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Avenida del Valle 601, Oficina 31, Ciudad Empresarial, Huechuraba Santiago – Chile

Telephone Nº (56–2)-738-4493; (56-2)-738-4477 Fax (56-2)-738-4488 E-Mail drm@drm.cl; Website www.drm.cl

MISSION

De Re Metallica Ingeniería Limitada, DRM, is a Chilean consulting company for industrial processes, created in August 1995 by outstanding professionals in the copper extractive metallurgy.

Our mission is to advise companies in the mining and metallurgical field as well as other industrial activities, in a series of aspects such as: Project Engineering, New Process Development, Diagnosis of Industrial Operations, Metallurgical Auditing, Process Optimization and Control, Computational Code Development, Project Evaluation, Patenting Studies and Professional Training.

Differentiating element compared to conventional engineering is the TECHNOLOGICAL INNOVATION component in all our work, evidenced through intensive use of Basic Sciences and Engineering Sciences aimed to solve the industrial problems presented to us. DRM has the response capacity of engineering companies with the deepness of a research centre or university.

OUR PERSONS Jorge Menacho Llaña : Outstanding Chilean professional in the mining

industry. He was awarded as the “Professional of the Year” in 2005 by the Chilean Institution for Mining Engineers and the Ramón Salas Edwards Award to the “Outstanding Contribution to Engineering” published within years 2003-2005”, distinction given by the Chilean Engineer Institution in 2006. His background includes basic sciences (B.Sc. Chemistry, University of Chile, 1972) and engineering sciences (D.Sc. Metallurgical Engineering, University of Concepción, Chile, 1985, and Post Doct at Pennsylvania State University, USA, 1985-1986). Field of interest are Hydrometallurgy, Mineral Processing and Environment. He has been linked to several universities, the Mining and Metallurgical Research Centre (CIMM) and engineering companies. Since 1995 he holds the Technical Manager position at DRM.

Yadranka Zivkovic Domic : Chemical Civil Engineer from the University of

Concepción, Chile. She worked shortly for the University of Concepción, then for CIMM and DRM since 1995. She has been involved in a variety of projects mainly in the Hydrometallurgy field. Areas of interest are process math modeling for optimization and environment control and the study of chemical topics in SX, contaminant behavior and patenting studies. She is Senior Consultant and Operation Manager at DRM.

Patricio Chávez Espinoza : Metallurgical Civil Engineer from the University

of Santiago, Chile. He has been involved in many optimization projects as well as metallurgical auditing. He is skilled in process analysis, dynamic modeling, optimization and code development. He is Process Engineer at DRM.

Elvis Peñaloza Ortiz : Metallurgical Engineer from the National University San Agustín de Arequipa Perú, he also holds a technical degree in Informatic Systems from the System and Data Processing Institute IPSIPRODA, Perú. He has been involved in development of design and optimization computing codes as well as metallurgical process studies. He currently holds the Process Engineer position at DRM.

Boris Merino Pulgar : Metallurgical Civil Engineer from the University of Concepción, Chile. He has been involved in many optimization projects as well as metallurgical auditing. He is skilled in process analysis, modeling and optimization.He has leaded the commissioning and start up of a new SX plant. He is Process Engineer at DRM

Guillermo Ávila Castillo : Metallurgical Civil Engineer from the University

of Concepción, Chile. He has been involved in industrial optimization projects as well as metallurgical design. He is skilled in process analysis, modeling and optimization. He is Process Engineer at DRM.

Daniel Jordán Paredes : Metallurgical Civil Engineer from the University

of Santiago, Chile. He has been involved in industrial optimization projects as well as metallurgical design. He is skilled in process analysis, modeling and optimization. He is Process Engineer at DRM.

BASIC ADMINISTRATIVE TEAM Natalia Mujica Neira : Executive Secretary Juan Garay Zelada : General Accountant Leonardo Garetto : Lawyer

WORKING FIELD DRM is highly skilled in process development, engineering studies and operational analysis with robust knowledge on basic and engineering sciences, much deeper than conventional engineering companies, for whom DRM use to be Consultant. Our knowledge on fundamentals allows to face any industrial process, but our experience is centered in Hydrometallurgy, Mineral Processing and Environmental Issues. We are “expert in solving specific process problems and also in the overall optimization and control of industrial plants, strongly oriented toward immediate improvement of the business result”, a highly valued feature in these high price days. How can we do this? By using our rich 35 years experience in process analysis and also by handling a battery of phenomenological models, most of them developed by ourselves, with intense use of transport phenomena, chemical kinetics, thermodynamics, reactor analysis, bioprocessing and other tools to model, simulate and optimize industrial operations. Specific skills supported by experience are listed below:

(I) Mineral Processing • Blasting

- Development of novel phenomenological models for granulometry estimation and further prediction of metal recovery at the concentrator operation.

• Crushing & Screening - Development of novel phenomenological models for optimization

of crushing and classification in screens. - Design of industrial crushing plants assisted by phenomenological

models. - Optimization of crushing plants assisted by static

phenomenological models. - Control of crushing plants assisted by dynamic phenomenological

models. - Training courses at specific companies.

• Rod and Ball Milling

- Development and adoption of phenomenological grinding models (population balances) for optimization of industrial circuits.

- Development of novel grinding-body wear model (population balances) for industrial optimization purposes.

- Design and dimensioning of industrial grinding and classification circuits.

- Optimization of industrial grinding and classification circuits. - Dynamic modeling of conventional mills for control purposes. - Procedure to estimate optimal ball make up at industrial plants. - Study on grinding media corrosion. - Training courses at specific companies.

• SAG Milling

- Development and adoption of phenomenological SAG mill model (population balances) for design and optimization issues.

- Dimensioning and optimization of SAG mill circuits. - Evaluation of pre-crushing options to enhance capacity in SAG

mill circuits assisted by phenomenological models. - Mass transport characterisation in SAG mills by means of radio

tracer experiments. - Development of novel model for mass transport in SAG and ball

mills (turbulent flow in porous media). - Development and application of methodologies to estimate SAG

milling model parameters. - Development and application of scaling up techniques in SAG

mills. - Dynamic modeling of conventional mills for control purposes. - Training courses at specific companies.

• Dry Milling

- Development and adoption of phenomenological models for design and optimization of clinker cement dry grinding (air-swept mill models).

- Dry cycloning of clinker cement for design and optimization purposes.

• Non Conventional Fracture Developments

- Design and optimization of vertical mills. - Modelling of vertical mills. - Design and optimization of high pressure grinding rolls. - Mechanical and metallurgical modelling of high pressure grinding

rolls. - Study on electro fracture of ores. - Development in centrifugal grinding device and process. - Development in ultrasonic grinding device and process.

• Flotation

- Development and adoption of phenomenological flotation models (kinetics model with distributed rate constants) to optimize industrial circuits.

- Design and dimensioning of industrial flotation circuits. - Development and application of novel scale up flotation models. - Development of reagent formula in flotation systems. - Fluid dynamics and mass transport in different size cells (RTD

tracer experiments). - Development of methodologies to scale up results from lab to

industrial plant and pilot plant to industrial plant. - Dynamic modeling of industrial flotation plants for control

purposes. - Flotation of clayish copper ores: bench scale tests and

optimization at industrial level. - Effect of salty water (brines) in flotation response at lab and

scale up to industrial scale. - Training courses at specific companies.

• Thickening

- Process engineering in thickening operations. - Design and dimensioning of industrial thickeners. - Diagnosis of industrial thickening operations. - Metallurgical auditing. - Optimization and control of industrial thickeners.

• Filtration

- Development of a novel phenomenological filtering dynamic model useful in design, optimization and control of industrial circuits (transport phenomena approach).

- Process engineering in filtering operations. - Design and dimensioning of industrial filters. - Diagnosis of industrial filtering operations. - Metallurgical auditing. - Optimization and control of filtering systems. - Training courses at specific companies.

• Drying

- Process engineering in drying operations. - Design and dimensioning of industrial dryers. - Diagnosis of industrial operations. - Metallurgical auditing. - Optimization and control of industrial dryers. - Mass and energy balances in industrial dryers. - Solar drying of sulfide concentrates and anodic muds. - Mass transport studies in rotary dryers, assisted by RTD tracer

experiments.

(II) Hydrometallurgy • Blasting

- Development of novel phenomenological models for granulometry estimation and further prediction of metal recovery and acid consumption in ROM leach operations.

• Crushing & Screening - Development of novel phenomenological models for crushing and

classification in screens. - Design of industrial crushing plants assisted by phenomenological

models. - Optimization of crushing plants assisted by static

phenomenological models. - Control of crushing plants assisted by dynamic phenomenological

models. - Training courses at specific companies.

• Aglomeration

- Development of novel phenomenological models to describe aglomeration in rotary drums (population balance models).

- Design and optimization of aglomeration circuits by means of phenomenological models.

- Optimization of lifters design and liquid addition system (acid and raffinate solutions) in industrial aglomerators.

- Determination of mass transport patterns through rotary

aglomerators assisted by RTD tracer experiments and flow models.

- Training courses at specific companies.

• Stacking

- Development of novel physical models for ore stacking (granulometric classification by zones).

- Optimization of industrial stacking operations by using phenomenological models.

- Studies on segregation phenomena and further impact in the subsequent leach step.

- Training courses at specific companies. • Leaching

- Development of novel phenomenological models for heap leaching, dump leaching and vat leaching.

- Development and application of novel models for liquid flow in porous media and application to solve flow problems in industrial operations.

- Design of industrial leach operations assisted by phenomenological models.

- Optimization of leach cycles assisted by phenomenological models. - Development of novel procedures to scale up hydrodynamics and

metallurgy results from column to industrial heap or dump lech operations.

- Diagnosis and metallurgical auditing in heap and dump leach operations with the use of transport phenomena tools.

- Set up of design parameters for heap and dump operations in phases of conceptual, basic and detail engineering projects.

- Development and adoption of tools from the hydrology field to hydrometallurgy.

- Development of leaching process for refractory, clayish and low-grade ores.

- Development of concentrate leaching processes.

- Development and application of a novel bioleaching model, which

includes liquid transport, solute transport (copper, acid, ferrous and ferric iron), bacteria growth, air and oxygen transport and heat transport.

- Training courses at specific companies. • Solvent Extraction

- Development of novel SX physical models for the copper exchange.

- Design and optimization of industrial SX circuits assisted by phenomenological models.

- Experimental and conceptual selection of optimal extractant formulae.

- Evaluation and selection of industrial diluents. - Control of organic degradation problems at industrial scale. - Analytical service to determine the organic composition of

industrial oxime solutions (aldoxime, ketoxime, aldehyde, ketone, tridecyl alcohol, diester TXIB, nitrated oxime, aldehyde and ketone).

- Definition of restoring system for the organic phase by jeans of activated clays.

- Fundamental adsorption studies of organic polar constituents on zeolite substrates, assisted by molecular modeling software.

- Development and application of novel phenomenological model useful for design, optimization and control of impurities in SX electrolytes.

- Diagnosis and control of the oxime nitration at industrial SX plants.

- Development of a novel mixing and settling model useful to predict entraiments at the weir exit and also a novel procedure to estimate drop size distribution in mixer and settler and 3D velocity profile in the settler.

- Design and optimization of picket fences in industrial SX plants, assisted by our own hydrodynamic code and CFD modeling.

- Mixing characterisation by application of RTD tracer experiments. - Training courses at specific companies.

• Electrowinning

- Development of a novel phenomenological model for electrowinning (electrochemical kinetic approach).

- Development of a novel phenomenological model for chlorine-gas evolution in industrial EW cells (electrochemical kinetic approach).

- Chlorine control at EW tankhouse. - Electrochemical decomposition of oximes in EW circuits

(polarisation curves, cyclic voltametry in non-aqueous media). - Control of acid aerosols in EW tankhouse (polypropilene spheres,

extractor systems, chemical additives such as FC-1100 and saponines).

- Development of a novel phenomenological model to estimate dispersion of acid mist in EW tankhouse (electrochemical model for the aid aerosol evolution and atmospheric dispersion model).

- Flow pattern characterization at EW cells by jeans of RTD tracer experiments.

- Auditing of engineering EW tankhouse projects. - Training courses at specific companies.

(III) Environment • Water Contamination

- Dynamic modeling of water industrial dams to estimate underground infiltration by means of transport phenomena approach.

- Stability of organic flotation reagents and infiltration to the sub soil.

- Contamination of dam water with humic acids dissolved from the natural soil and effect in the flotation process.

- Dynamic modeling of solute transport in the vadose zone, with/without chemical reaction to estimate contaminant spread out.

- Transport of organic/inorganic species to estimate contamination in underground courses.

- Scale up and forecast of impurity behavior at industrial mineral processing and leaching plants.

- Evaluation of the impact of a reverse osmosis plant in the

quality of Molybdenum Plants effluents. - Heavy-metal precipitation with lime and disposal in dams.

• Air Contamination - Probability model to predict transport of paraffinic.contaminants

through air. - Model to estimate chlorine gas evolution at industrial

tankhouses. - Studies on air pollution control in crushing plants.

SELECTED CLIENTS • Minera Lomas Bayas, Xstrata Copper • Compañía Minera Doña Inés de Collahuasi, Anglo American – Xstrata

Copper - Mitsui • Minera Escondida Limitada, BHP Billiton • Empresa Mantos Blancos, División Manto Verde, Anglo American plc • AngloAmerican Chile, Planta Las Tórtolas, Planta Los Bronces, Planta

El Soldado, Anglo American plc • Sociedad Punta del Cobre S.A. • Codelco Norte, Gerencia de Hidrometalurgia Norte (ex Radomiro

Tomic) • Codelco Norte, Gerencia de Hidrometalurgia Sur (ex Chuquicamata) • Codelco El Teniente, Subgerencia de Ingeniería • Codelco Andina, Subgerencia de Ingeniería • Minera Gaby, Codelco Chile • Sociedad Contractual Minera El Abra, Codelco Chile, Freeport -

McMoran • Compañía Minera Quebrada Blanca, OUR Resources Chile Limitada • BHP Billiton, BHP Chile Inc. • Compañía Minera Cerro Colorado Ltda., BHP Billiton • Minera Michilla, Antofagasta Minerals • Minera Cerro Dominador S.A., Compañía Minera El Bronce • Sociedad Química y Minera de Chile S.A. • Cía. Minera Zaldivar, Barrica Chile • Bechtel A.R.A. • Arcadis Geotécnica • Molycop CHile • Cognis Chile • Avecia Chile, • Shell Chile S.A.I.C. • Phillips Petroleum • Westfalia Chile • Refinería Petróleo de Concón, RPC.

PROFESSIONAL EXPERIENCE PROJECT : Diagnosis and Improvement of the Organic Quality at

the Radomiro Tomic Solvent Extraction Plant COMPANY/YEAR : Codelco Chile, División Codelco Norte, 2008 PROJECT : Environmental Analysis of the Disposal of the HDS

Mud-Plant in the Ovejería Dam. Use of Dynamic Simulation Tools

COMPANY/YEAR : Codelco Chile, 2008 PROJECT : Diagnosis and Improvement of the Organic Quality at

the Minera Escondida Limitada Solvent Extraction Plant

COMPANY/YEAR : Minera Escondida Limitada, 2008 PROJECT : Optimization of the Current and Future Leaching and

Cristallization Plant to Produce Copper Sulphate COMPANY/YEAR : Compañía Minera Quimal, 2008 PROJECT : Technical Assistance in the Commisioning and Start

Up of the SX Plant at Minera Gaby COMPANY/YEAR : Minera Gaby S.A., 2008 PROJECT : Dynamic Simulation of the Compañía Minera Cerro

Colorado Leach Operation with Run-of-Mine Granulometry

COMPANY/YEAR : BHP Billiton, 2008 PROJECT : Estimation of Production Vector, Acid and Water

Consumption in the Caserone ROM Dump Leach Project. Use of Dynamic Simulation Tools

COMPANY/YEAR : Aker Kvaerner Chile, 2008 PROJECT : Estimation of the Water Quality Impact in the

Metallurgical Response of the Concentrator and Moly

Plants. Part II: Exploration of Process and Operation Variables through Dynamic Simulation

COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2007 PROJECT : Development and Application of an Overall Balance

Model for the Novel Ferric Leach Procedure Developed at Codelco Chile RT Plant. Behavior of By-Products is Included. Dynamic Simulation Tools were Applied

COMPANY/YEAR : Codelco Chile, División Codelco Norte, 2008 PROJECT : Exploration of Different Options within the Loa

Production Plan by means of Dynamic Simulation COMPANY/YEAR : Compañía Minera Cerro Colorado, 2007 PROJECT : Scale Up and Estimation of Metallurgical Recoveries in

the Regalito Leach Project COMPANY/YEAR : Lumina Copper Chile (Nippon Mining Co.), 2007 PROJECT : Estimation of the Water Quality Impact in the

Metallurgical Response of the Concentrator and Moly Plants. Part I: Dynamic Simulation of Posible Scenary

COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2007

PROJECT : Integral Water Balance and Physico Chemical Profile

in the Concentrator and Osmosis Plant Effluents COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2007 PROJECT : Estimation of the Loa FY 2009 – 2016 Production Plan

through Dynamic Simulation COMPANY/YEAR : Compañía Minera Cerro Colorado, 2007 PROJECT : Diagnosis and Optimization of the San José

Concentrator (crushing, grinding and flotation plants) COMPANY/YEAR : Pucobre, 2007 PROJECT : Diagnosis of the Heap Bioleaching Operation COMPANY/YEAR : Minera Zaldívar, 2007 PROJECT : Water Balance in the Cerro Colorado Industrial

Operation COMPANY/YEAR : Compañía Minera Cerro Colorado, 2007 PROJECT : Integral Assistance to Improve Operacional Results at

Compañía Minera Cerro Colorado COMPANY/YEAR : Compañía Minera Cerro Colorado, 2007 PROJECT : Hydrodynamic Characterization of the ROM Ore COMPANY/YEAR : Compañía Minera Zaldívar, 2007 PROJECT : Technical Analysis of the Crushing and Leaching

Operations COMPANY/YEAR : Compañía Minera Zaldívar, 2007 PROJECT : Modelling and Simulation of Comminution Circuits

Using the JK.SimMet® Code (Pebbles Handling System Re-Powering, Conceptual Engineering)

COMPANY/YEAR : SNC Lavalin, 2007

PROJECT : Technical Support to Claim the Insurance covering the

Stockpile Accident May 2006 COMPANY/YEAR : Compañía Minera Zaldívar, 2007-2008 PROJECT : Technical Assistance to Use the DRM LixRom®

Computational Code COMPANY/YEAR : Sociedad Contractual Minera El Abra, 2007 PROJECT : Modeling and Simulation of Comminution Circuits Using

the DRM Simulating Code COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2007 PROJECT : Use of Dynamic Model to Estimate Future Budget at

CMCC COMPANY/YEAR : Compañía Minera Cerro Colorado, 2007 PROYECT : Integral Assistance to Improve Operacional Results at

Compañía Minera Escondida Limitada COMPANY/YEAR : Minera Escondida Limitada, 2007 PROJECT : Technical and Economical Audit to Santa Margarita

Plant COMPANY/YEAR : Minera Cerro Dominador, 2007 PROJECT : Training in the Use of FilterSim® Software (DRM

property) COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2007 PROJECT : Metallurgical Assistance to Comissioning of the

Chalcopyrite Pad Leach Pilot Plant COMPANY/YEAR : Codelco Chile, Andina Division, 2007 PROJECT : Gas Permeability of Ores in the Spence Project COMPANY/YEAR : BHP Billiton, 2007

PROJECT : Projection of Pilot Plant Results Using the BioLeach®

Code (DRM property) COMPANY/YEAR : Codelco Chile, Andina Division, 2007 PROJECT : Bench Marking on Reverse Flow SX Plants COMPANY/YEAR : Minera Gaby, 2006 PROJECT : Diagnosis on Residual Flotation Reagents at Las

Tórtolas Plant COMPANY/YEAR : AngloAmerican Chile, 2006 PROJECT : Overall Water Balance and Physico-Chemical Profile of

Patache Effluents COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2006 PROJECT : Preliminar Analysis of the Lipesed Coalescer at

Compañía Mantos de la Luna S.A. COMPANY/YEAR : Codelco Chile, División Codelco Norte, 2006 PROJECT : Dynamic Simulation of Daily Results during the Ramp

Up at Minera Gaby COMPANY/YEAR : Codelco Chile, Minera Gaby, 2006 PROJECT : Bench Marking on Evaporation Rate in Heap Leach

Plants COMPANY/YEAR : Sociedad Minera El Abra, 2006 PROJECT : Workshop on the Use of the FilterSim® Code (DRM

Property) COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2006 PROJECT : Scale Up and Projection of Results in the Secondary

Ripios Heap Leaching at Minera Gaby COMPANY/YEAR : Minera Gaby, 2006

PROJECT : Analysis of the Industrial Cleaner Filip Ser Circuit –

Sampling September 2006 COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2006 PROJECT : Fines Control at the CMCC Crushing Plant COMPANY/YEAR : Compañía Minera Cerro Colorado, 2006 PROJECT : Production Vector Dynamic Simulation with the Mine

Program /04/09/2006, Stacking in 1, 2 and 3 Phases COMPANY/YEAR : Sociedad Minera El Abra, 2006 PROJECT : Proposal of Protocol to Check the Process Guarantee

of the Bateman Gaby SX Plant COMPANY/YEAR : Minera Gaby, 2006 PROJECT : Oxide Leach Plants Bench Marking COMPANY/YEAR : Minera Escondida Limitada, 2006 PROJECT : Dynamic Simulation of the Minera Gaby Secondary

Ripio Heap Leach Operation COMPANY/YEAR : Minera Gaby, 2006 PROJECT : Calculation of the Optimum Leach Cycle to Reach a

Steady Concentration and the PLS Solution COMPANY/YEAR : Minera Gaby, 2006 PROJECT : Use of Tritium as Radiotracer to Characterize

Solution Movement inside the Codelco Norte Leach Pads

COMPANY/YEAR : Codelco Chile, Codelco Norte Division, 2006 PROJECT : Ramp Up Production Options in the Ripio Secondary

Leaching ENMS/RCHU Project COMPANY/YEAR : Bechtel Chile, 2006

PROJECT : Global Assistance to the Pilot Plant Heap Leach

Program with Future Ores COMPANY/YEAR : Compañía Minera Cerro Colorado, 2006 PROJECT : Process Options to Control the Statistical Variability

in the Mine Grades COMPANY/YEAR : Codelco Chile, División Codelco Norte, 2006 PROJECT : Fines Control at the Crushing and Agglomeration

Plants COMPANY/YEAR : Compañía Minera Cerro Colorado, 2006 PROJECT : Estimation of the Production Program for the Fiscal

Year 2007 Assisted by Dynamic Simulation COMPANY/YEAR : Compañía Minera Cerro Colorado, 2006 PROJECT : Metallurgical and Hydrodynamic Simulation of Nitrate

Caliche Leach Pads COMPANY/YEAR : Soquimich, 2006 PROJECT : Beneficiation of Blend of Mina Sur and Chuqui Ripios

(RMS/RCH): Conceptual Engineering Project COMPANY/YEAR : Cade Idepe, 2006 PROJECT : Improvement in the Production Planning System at

CMCC COMPANY/YEAR : Compañía Minera Cerro Colorado, 2006 PROJECT : Scale Up in the Recovery and Acid Consumption for

Ripios Blends COMPANY/YEAR : Codelco Chile, Codelco Norte Division, 2006 PROJECT : Options to Maximize Throughput at the Crushing Plant COMPANY/YEAR : Codelco Chile, Codelco Norte Division, 2005

PROJECT : Development of the Software Pro2. PTMP1.0 COMPANY/YEAR : Codelco Chile, Codelco Norte Division, 2005 PROJECT : Optimization of the Patache Industrial Filter Plant COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2005 PROJECT : Study on Grinding Media Corrosion and Impact on

Floatability of Copper Sulfide Ores COMPANY/YEAR : Molycop, 2005 PROJECT : Bench Marking in Sulfide Concentrate Filter Plants COMPANY/YEAR : Minera Escondida Limitada, 2005 PROJECT : Use of Dynamic Simulation to Estimate Daily

Production during the Ramp Up in the Sulfolix Project COMPANY/YEAR : Sociedad Minera El Abra, 2005 PROJECT : Technical and Economical Evaluation of Addition of a

New Filter Unit at Puerto Patache COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2005 PROJECT : Development of a New Calculation System to Estimate

Production Programs Assisted by Dynamic Simulation COMPANY/YEAR : Codelco Chile, Codelco Norte Division, 2005 PROJECT : Diagnosis of the Heap Leach Operation COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2005 PROJECT : Revision of the Drainage System and Heel

Permeability at the PTMP Hep Leach Plant COMPANY/YEAR : Codelco Chile, Codelco Norte Division, 2005 PROJECT : Metallurgical Optimization of the Crushing Plant

(9,000 t/h capacity) COMPANY/YEAR : Codelco Chile, Codelco Norte Division, 2005.

PROJECT : Molybdenite Flotation Depression at Las Tórtolas

Concentrator COMPANY/YEAR : Anglo American Chile, 2004-2005. PROJECT : Lifter Design in Agglomerator Drums COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2004 PROJECT : Hydrodynamic Optimization at the HidroSur SX Plant COMPANY/YEAR : Codelco Chile, Codelco Norte Division, 2004 PROJECT : Pre Crushing Step in the SAG Circuit – Conceptual

Engineering Study COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2004 PROJECT : Restoring of Physical Properties of the Organic

Extractant at the SX HidroSur Plant COMPANY/YEAR : Codelco Chile, Codelco Norte Division, 2004 PROJECT : Diagnosis of Current Situation at the LIX-SX

Radomiro Tomic Industrial Plant COMPANY/YEAR : Codelco Chile, Codelco Norte Division, 2004 PROJECT : Estimating Monthly Production Vector in the

Secondary Leaching Project at Cerro Colorado COMPANY/YEAR : Compañía Minera Cerro Colorado, 2004 PROJECT : Metallurgical Analysis of Copper Recovery from the

Rosario COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2004 PROJECT : Purge Destine Optimization at SX Plant COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2004

PROJECT : Metallurgical Support and Definition of the Optimal

Leaching Sequency in the Secondary Dump Leaching Gaby Project

COMPANY/YEAR : Arcadis – Geotécnica, 2004 PROJECT : Diagnosis of the Cathode Contamination with Chloride COMPANY/YEAR : Minera Michilla, 2004 PROJECT : Development of a New Decanter Device for SX Plants COMPANY/YEAR : Compañía Minera Lomas Bayas, 2004-2005 PROJECT : Recovery Optimization of CMDIC Heap leaching

Operation Assisted by Process Simulator COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2004 PROJECT : Development of a Process Simulator for the ROM

Leach Operation COMPANY/YEAR : El Abra, 2004 PROJECT : Revision and Improvement in the Draining System at

the Heap Leach Plant COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2004 PROJECT : Diagnosis of the Current and Future Operation at the

Concentrate CMDIC Filtering Plant COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2004 PROJECT : Evaluation of a New Alternative to Remove Manganese

from Tankhouse Electrolytes COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2004 PROJECT : Metallurgical Consulting at Compañía Minera Cerro

Colorado COMPANY/YEAR : Compañía Minera Cerro Colorado, 2004

PROJECT : Assistance to the CMCC Leach Operation COMPANY/YEAR : Compañía Minera Cerro Colorado, 2004 PROJECT : Mineralogy Characterization of Current and Future

Ores COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2004 PROJECT : Metallurgical Audit of the Industrial Operation COMPANY/YEAR : Compañía Minera Cerro Colorado, 2004 PROJECT : Optimization of the Flotation Response of Clayish

Sulfide Ores COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2003 PROJECT : Metallurgical Consulting for the Hydrometallurgy

Management COMPANY/YEAR : Gerencia de Hidrometalurgia Norte, Codelco Norte

Division, 2003 PROJECT : Diagnosis of the Current SX Plant Facing the New

ENMS Project COMPANY/YEAR : Codelco Chile, Codelco Norte Division, 2003 PROJECT : Estimation of the Oxide Plant Capacity COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2003 PROJECT : Estimation of the Concentrator Plant Capacity COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2003 PROJECT : Optimization of the Leaching Operation COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2003 PROJECT : Trade Off: Organic Entrainment versus Throughput at

the Industrial SX Plant COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2003

PROJECT : Development of a Computing Platform to Optimize

Stacking and Irrigation Programs according to Budget COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2003 PROJECT : In Situ Impurity Precipitation from the Chuquicamata

Ripio and Underlying Graves COMPANY/YEAR : Codelco Norte, Gerencia de Hidrometalurgia Sur,

2003 PROJECT : Improvement in Moly Recovery at Las Tórtolas

Flotation Plant COMPANY/YEAR : Anglo American Chile, 2003 PROJECT : Alternatives to Control the Extractant Chemical

Degradation at the SX Plant COMPANY/YEAR : Codelco Norte, Gerencia de Hidrometalurgia, 2003 PROJECT : Development of a Novel Picket Fence Distributor for

SX Plants: Design, Construction and Installation COMPANY/YEAR : Cía. Minera Doña Inés de Collahuasi, 2003 PROJECT : Hydrodynamic Analysis of Solution Run-off through

the ENMS Heaps COMPANY/YEAR : Codelco Norte, Gerencia de Hidrometalurgia, 2003 PROJECT : Study of Chemical Stability of Sulfosuccinate Diester COMPANY/YEAR : Codelco Norte, Gerencia de Hidrometalurgia, 2003 PROJECT : Recovery Scale up from Mini Column to Heap and

Dump Leaching Operations COMPANY/YEAR : Codelco Norte, Gerencia de Hidrometalurgia, 2003 PROJECT : Dimensioning of a Plate Filter for the SX Plant COMPANY/YEAR : Codelco Chile, División Codelco Norte, Gerencia de

Hidrometalurgia Sur, 2002

PROJECT : Infrared Analysis of Organic Solution at the SX Plant COMPANY/YEAR : Codelco Chile, Codelco Norte Division, 2002 PROJECT : Dimensioning of a Plate Filter at the SX Plant COMPANY/YEAR : Codelco Chile, Codelco Norte Division, 2002 PROJECT : A New Procedure to Remove Chloride in the Reducting

Tower of Chuquicamata SX Plant COMPANY/YEAR : Codelco Chile, Codelco Norte Division, 2002 PROJECT : Effect of Intermittent Irrigation in the Copper

Recovery, Acid Consumption and Heat Balance in Heap Bioleaching

COMPANY/YEAR : Compañía Minera Cerro Colorado, 2002 PROJECT : Metallurgical and Geotechnical Analysis in Heap

Remining Operations: Pads 15 and 16 COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2002 PROJECT : Design and Projection of Heap Leach Testing in the

ROM Gaby Project COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 2002 PROJECT : Metallurgical Audit: Upgrading of the SX-1 and SX-2

Solvent Extraction Plants COMPANY/YEAR : Minera Michilla, 2002 PROJECT : Integral Restoring of Properties of the SX Organic

Phase COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 2002 PROJECT : Hydrodynamic Characterization of Picket Fences at

the SX Plant COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2002

PROJECT : Analysis of the New Organic Washing System at the

SX Plant COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 2002 PROJECT : Integral Assistance to the Heap Leach Operation COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2002 PROJECT : Historical Analysis of Codelco’s Contribution to

Development of the Modern Hydrometallurgy COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 2001 PROJECT : Integral Procedure to Improve Efficiency in the SX

Plant COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 2001 PROJECT : Analysis of the Ripio Heap Leach Operation COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 2001 PROJECT : Metallurgical Optimization of the Radomiro Tomic

Crushing Plant COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 2001 PROJECT : Metallurgical Model to Estimate Production COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 2001 PROJECT : Diagnosis of the Operation in the Dry and Wet Areas COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2001 PROJECT : Conceptual Engineering RT Plant Enlargement to 330

kt Cut/year Project (Process Discipline) COMPANY/YEAR : Outokumpu - Indepro, 2001 PROJECT : Experimental Study to Leach Ripios Mixes COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 2001

PROJECT : Experimental Study in the Dump Leach Operation COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 2001 PROJECT : Revision of the Profile Engineering Chuqui North

Project COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 2001 PROJECT : Effect of the Inclined Base in the Solution Movement

through Flotation Tailing Heap Leach Pilot Operation COMPANY/YEAR : Codelco Chile, El Teniente Division, 2001 PROJECT : Restoring Properties of the Organic Phase in the SX

Plant COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 2001 PROJECT : Material Handling in the Industrial Test to Leach Old

Tails Stocked in the Barahona Dam COMPANY/YEAR : Codelco Chile, El Teniente Division, 2001 PROJECT : Control of the Process Guarantee at the Industrial SX

VSF Outokumpu Train D SX Plant COMPANY/YEAR : Codelco -Chile, Radomiro Tomic Division, 2001 PROJECT : Metallurgical Report ARI C99XL44 Checking the

Stacking and Leach Design Parameters COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 2001 PROJECT : Detail Engineering for the Radomiro Tomic Dump

Leach Operation (Process Aspects) COMPANY/YEAR : Codelco -Chile, Radomiro Tomic Division, 2001 PROJECT : Diagnosis of the Industrial Hydrometallurgical

Operation COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2001

PROJECT : Heap Leach Optimization at Minera Michilla Plant COMPANY/YEAR : Minera Michilla S.A., 2001 PROJECT : Assistance in the Selection of an Optimum Extractant

Formula at the SX Plant COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 2001 PROJECT : Technical and Economical Feasibility to Recover

Valuable By-Products from the RT Leach Solutions COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 2001 PROJECT : Column Testing to Leach Flotation Tailings COMPANY/YEAR : Codelco Chile, El Teniente Division, 2001 PROJECT : Optimization of the Crushing Plant COMPANY/YEAR : Minera Michilla S.A., 2001 PROJECT : Aglomeration of Flotation Tailing in Rotary Drums COMPANY/YEAR : Codelco Chile, El Teniente Division, 2001 PROJECT : Diagnosis of the Ripio Dump Leach Operation COMPANY/YEAR : Compañía Minera Disputada de Las Condes, 2001 PROJECT : RTD Analysis at the Grinding and Flotation Circuits COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2001 PROJECT : RTD Analysis in Mini-Box Heap Leaching Tests COMPANY/YEAR : Codelco Chile, División Chuquicamata, 2000 PROJECT : State-of-the-Art in the Technology to Agglomerate

Ores with Flocculant Additives COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 2000 PROJECT : Arsenic Handling in the RMSA Project COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 2000

PROJECT : Analysis and Projection of the Ripio Mina Sur Column

Leach Testing COMPANY/YEAR : Codelco -Chile, Chuquicamata Division, 2000 PROJECT : Bench Scale Flotation Study of RT Ores COMPANY/YEAR : Codelco Chile, División Radomiro Tomic, 2000 PROJECT : Chacterization of the Organic Solution Recovered

from the Raffinate Pond COMPANY/YEAR : Compañía Minera Doña Inés de Collahuasi, 2000 PROJECT : Optional SX Circuits to Minimize Entrainments at the

SX Plant COMPANY/YEAR : Compañía Minera Lomas Bayas, 2000 PROJECT : Improving the Leach Conditions at the Ripio Dump

Leach Operation COMPANY/YEAR : Cía. Minera Disputada de Las Condes, 2000 PROJECT : Hydrodynamic Characterization of Fines in the RMSA

Material COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 2000 PROJECT : Heap Leach Scale Up Results from Column Tests COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 2000 PROJECT : Effect of Flocculant Additives in the RMSA Ripio

Heap Leach Operation COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 2000 PROJECT : Extractant Formula Selection for the Fourth Train at

RT SX Plant COMPANY/YEAR : Codelco Chile, División Radomiro Tomic, 2000

PROJECT : Comparative Evaluation of Shell and Market SX

Diluents COMPANY/YEAR : Shell Chile S.A.I.C., 2000 PROJECT : Hydrodynamic Analysis of the RMSA Heap Leach

Industrial Operation Up to May 2000 COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 2000 PROJECT : Planning of Checking Testwork to Leach Old Tails

from the Barahona Dam COMPANY/YEAR : Codelco Chile, El Teniente Division, 2000 PROJECT : Diagnosis of Measuring System and Procedure to

Compute the Metallurgical Balance COMPANY/YEAR : Codelco -Chile, Radomiro Tomic Division, 2000 PROJECT : Analysis of Results from the Experimental Ripios Mina

Sur Heap Leaching COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1999 PROJECT : Optimization and Control of the Agglomeration of

Ripios Mina Sur at Industrial Scale COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1999 PROJECT : Improvement in the Heap Leach Operation COMPANY/YEAR : Codelco -Chile, Chuquicamata Division, 1999 PROJECT : Study to Maximize Throughput at the Industrial

Crushing Plant COMPANY/YEAR : Cía. Minera Lomas Bayas, 1999 PROJECT : Control of Solid Contaminants at the Quebrada Blanca

SX Plant COMPANY/YEAR : Cía. Minera Quebrada Blanca, 1999

PROJECT : Study to Reduce Degradation of the Organic Phase at

the Quebrada Blanca SX Plant COMPANY/YEAR : Cía. Minera Quebrada Blanca, 1999 PROJECT : Calcium Removal from Molybdenum Concentrates at

Las Tórtolas Concentrator COMPANY/YEAR : Cía. Minera Disputada de Las Condes PROJECT : Optimization of the Belt Transport and Stacking of

Agglomerated Ores COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1999 PROJECT : Diagnosis of the Current Operation at the Quebrada

Blanca SX Plant COMPANY/YEAR : Cía. Minera Quebrada Blanca, 2000 PROJECT : Diagnosis of the Current Operation at the Quebrada

Blanca SX Plant COMPANY/YEAR : Cía. Minera Quebrada Blanca, 1999 PROJECT : Development of Procedures and Protocols to Control

the Experimental Ripio RMSA Heap Leach Test COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1999 PROJECT : Control of Process Guarantee at Trains A-B-C SX VSF

Outokumpu Plant COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 1999 PROJECT : Comments to the SRK audit. Report on the

Geometallurgical Plan COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1999. PROJECT : Evaluation of New Additives to Improve Solution Flow

through the CMCC Pads COMPANY/YEAR : Cía. Minera Cerro Colorado, 1999

PROJECT : Effect of Magnafloc 333 Flocculant in the

Hydrodynamic Response of Different Geometallurgical Unit Ores

COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1999 PROJECT : Development of an Improved System to Estimate

Metallurgical Balances at Radomiro Tomic Plant COMPANY/YEAR : Codelco -Chile, Radomiro Tomic Division, 1999 PROJECT : Patent Review on Procedures to Clean Organics with

Decanter Devices COMPANY/YEAR : Westfalia Chile, 1999 PROJECT : Kinetic of Decomposition of Aldoxime and Ketoxime

Extractants at Lomas Bayas COMPANY/YEAR : Cía. Minera Lomas Bayas, 1999 PROJECT : Development of a Computational System to Estimate

Long-Term Production at CMCC COMPANY/YEAR : Cía. Minera Cerro Colorado, 1999 PROJECT : Diagnosis of the Metallurgical Balance System at the

CMDIC Concentrator Plant COMPANY/YEAR : Cía. Minera Doña Inés de Collahuasi, 1999 PROJECT : Simulation of Alternative SX Circuits to Maximize

Production at Loma Bayas COMPANY/YEAR : Cía. Minera Lomas Bayas, 1999 PROJECT : Impact and Control of Nitrate in Leach Solutions at

Radomiro Tomic COMPANY/YEAR : Codelco -Chile, Radomiro Tomic Division, 1999 PROJECT : Revision of the Irrigation System at the RMSA Heap

Leach Operation COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1999

PROJECT : Behavior of Nitrate at the SX Lomas Bayas Plant COMPANY/YEAR : Cía. Minera Lomas Bayas, 1999 PROJECT : Use of Lagrange Multipliers to Estimate Material

Balance at Leach Operations COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1999 PROJECT : Nuclear Magnetic Resonance Analysis of Organic SX

Solutions COMPANY/YEAR : Codelco -Chile, Radomiro Tomic Division, 1998 PROJECT : Study to Optimize Industrial Agglomerate Drums at

the RMSA Plant COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1998 PROJECT : Analysis of the Organic Phase at Minera Michilla SX

Plant COMPANY/YEAR : Minera Michilla S. A., 1998 PROJECT : Control of the Chloride Transfer to the Electrolyte at

the Radomiro Tomic SX-EW Plant COMPANY/YEAR : Zeneca, 1998 PROJECT : Organic Analysis of Extractant Solutions at Different

SX Plants in Chile COMPANY/YEAR : Zeneca, 1998 PROJECT : Upgrading the Metallurgical Lab Facilities COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1999 PROJECT : Technical Analysis on Current Situation in the RMSA

Experimental Pad COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1998

PROJECT : Ripio Characterization from the Cerro Colorado

Hydrometallurgical Operation COMPANY/YEAR : Compañía Minera Cerro Colorado, 1998 PROJECT : Filtering of Organic and Kieselghur Mix in a Larox

Unit COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 1998 PROJECT : Control of Fine Particles and its Effect in the Heap

Leach Operation at CMCC COMPANY/YEAR : Compañía Minera Cerro Colorado, 1998 PROJECT : Metallurgical Classification of the Mina Sur Ores COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1998 PROJECT : Chemical Transfer of Chloride via Oximes in the

Copper Solvent Extraction COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1998 PROJECT : Basis to Develop an Integrated Information System COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 1998 PROJECT : Development of a New Extractant Formula at the

Chuquicamata SX Plant COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1998 PROJECT : Study of the Composition of the Organic Phase at the

RT SX Plant COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 1998 PROJECT : Simulation of the Crushing Plant Period 1998 – 2002

for Different Mixes of Oxide and Sulfide Ores COMPANY/YEAR : Compañía Minera Cerro Colorado, 1998

PROJECT : Metallurgical Consulting in the RAMS/RFMS Heap

Leach Operation COMPANY/YEAR : Codelco -Chile, Chuquicamata Division, 1998 PROJECT : Evaluation of Westfalia Decanter as Alternative to

Recover Organic Solution from Cruds in Copper SX Plants

COMPANY/YEAR : Westfalia Separator, 1998 PROJECT : Simulation of the CMCC Crushing Plant with P80 1/2”

and 5/8” COMPANY/YEAR : Compañía Minera Cerro Colorado, 1998 PROJECT : Crushing Options for the SNSA Ore COMPANY/YEAR : Compañía Minera Cerro Colorado, 1998 PROJECT : Statistical Method to Estimate Copper Recovery in

Vat Leaching Starting from the Forecast Laboratory Test

COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1998 PROJECT : Procedure for Sampling the Feed Ore to Leaching

Using the Ramsey System COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 1998 PROJECT : Scale Up Flow Considerations in Heterogeneous

Particle Beds COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 1998 PROJECT : Bench Marking of the Grinding Media Market COMPANY/YEAR : Molycop, 1998 PROJECT : Exploring Flocculants Alternatives to Magnafloc 333

in Vat Leach Industrial Operation COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1998

PROJECT : Peripherical Feed to Vat Leach Tanks COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1997 PROJECT : Study to Reduce Fines at the Crushing CMCC Plant COMPANY/YEAR : Compañía Minera Cerro Colorado, 1997 PROJECT : Particle Size Segregation Model in Ore Stacking

Operations COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 1997 PROJECT : Development of an Analytical Technique to Determine

Polyacrylamide Residuals in Acid Solutions COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1997 PROJECT : Study to Optimize the Magnafloc 333 Preparation and

Addition System in the Vat Leach Operation COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1997 PROJECT : Technical and Economical Analysis of Using Magnafloc

333 at the Whole Hydrometallurgical Operation COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1997 PROJECT : Analytical Service to Evaluate Solvent for SX Plants COMPANY/YEAR : Concón Oil Refinery, 1997 PROJECT : Technical Inspection to the Radomiro Tomic Pilot

Plant COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 1997 PROJECT : Study on Iodine Analytical Determination COMPANY/YEAR : Codelco Chile, Radomiro Tomic Division, 1997 PROJECT : NMR Analysis of Organics from the Low Grade

Sulfide Plant COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1997

PROJECT : Development of a New Extractant Formula at the

Chuquicamata SX Plant COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1997 PROJECT : Study to Reduce Crud Formation at the Mantos

Blancos SX Plant COMPANY/YEAR : Empresa Minera Mantos Blancos S.A., 1997 PROJECT : Market Study for Solvent in the Mining Industry COMPANY/YEAR : Paréz y Alvarez Ingenieros Asociados Ltda., 1997 PROJECT : Evaluation of the ORFOM-SX12 Solvent COMPANY/YEAR : Interquímica, 1997 PROJECT : New Solvents for the Mining Industry COMPANY/YEAR : Concón Oil Refinery, 1996 PROJECT : Analysis of Critical Success Factors in the New CSM

Process COMPANY/YEAR : Metaproject, División Andina 1996 PROJECT : Characterization of MOC 55TD Extractant Samples COMPANY/YEAR : Andean Mining & Chemicals Ltd., 1996 PROJECT : Comments on the Copper-Zinc Ore Processing at

Minera Antamina, Perú COMPANY/YEAR : Cía. Minera Cerro Colorado, 1996 PROJECT : Final Simulations for the New Crushing Plant at Cerro

Colorado COMPANY/YEAR : Cía. Minera Cerro Colorado, 1996 PROJECT : Environmental Analysis of the New "LR" Process in

Codelco Chile, Andina Division COMPANY/YEAR : Codelco Chile, Andina Division, 1996

PROJECT : Study to Reduce Solution Impregnation in Drained Vat

Leach Ripios COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1996 PROJECT : Exploring Study on Crushing Options in the Cerro

Colorado Expansion COMPANY/YEAR : Compañía Minera Cerro Colorado, 1996 PROJECT : Study to Control the Solvent Evaporation at the SX

Plant, "Processing of CMD Mine Waters", Conceptual Engng. Project

COMPANY/YEAR : Compañía Minera Disputada de Las Condes, 1996 PROJECT : Study to Reduce the Agglomeration in the Copper

Filtered Concentrate at Las Tórtolas Plant COMPANY/YEAR : Compañía Minera Disputada de Las Condes, Las

Tórtolas Area, 1996 PROJECT : Study to Control the Acid Mist at the SX Plant,

"Processing of CMD Mine Waters", Conceptual Engng. Project

COMPANY/YEAR : Compañía Minera Disputada de Las Condes, 1995 PROJECT : Conceptual Study to Increase the Crushing Plant

Capacity by Introducing a New Screening Station COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1995 PROJECT : RTD Study at the Flotation Tailing Barahona Dump

Leaching COMPANY/YEAR : Codelco Chile, El Teniente Division, 1995 PROJECT : Diluents Evaluation for the Chuquicamata SX Plant COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1995-1996

PROJECT : Options to Implement the New Extractant Formula at

the Chuquicamata SX Plant COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1995 PROJECT : Side Effect in the SX Plant due to Use of Wetting

Agents in the Leach Operation COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1995 PROJECT : Development of a Grinding-Flotation Flowsheet for

the Minera La Patagua Plant COMPANY/YEAR : Compañía Minera La Patagua, 1995 PROJECT : Optimization of the Industrial Grinding Circuit at

Minera Tocopilla COMPANY/YEAR : Compañía Minera Tocopilla, 1995 PROJECT : Revision of Design and Operational Conditions at Las

Tórtolas Black Acid Neutralization Plant COMPANY/YEAR : Compañía Minera Disputada de Las Condes, 1995 PROJECT : Flocculant Identification at the Chuquicamata SX

Plant COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1995 PROJECT : Study to Control the Iron Precipitation in the Heap

Leach Operation COMPANY/YEAR : Compañía Minera Cerro Colorado, 1995 PROJECT : Hydraulic and Metallurgical Characterization in Box

Leach Experiments COMPANY/YEAR : Codelco Chile, Chuquicamata Division through CIMM,

1995 PROJECT : Conceptual Evaluation of Sprinkler Evaporation to

Concentrate PLS Solutions COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1994

PROJECT : Defense of Application Patents Nº 0378-92, 0921-92

and 0816-92 Codelco –Chile Property COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1994 PROJECT : Development of an Isobaric Percolator to Simulate

Leaching under Load COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1994 PROJECT : RTD Measurements in Leach Boxes and Scale Up to

the Industrial Dump Operation COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1994 PROJECT : Extractant Evaluation at the SX Plant COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1994 PROJECT : Development of a New Hydro Method to Enrich and

Purify Copper Concentrates COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1993-1994 PROJECT : Evaluation of the New Chuquicamata Mesh Filter to

Clean Aqueous SX Solutions COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1993-1994 PROJECT : Marketing and Technology Sale of the Mechanical

Crud Rupture to Recover Organic Solution at SX Plants

COMPANY/YEAR : Codelco Chile, División Chuquicamata, 1993-1994 PROJECT : Study to Increase Molibdenite Recovery at the

Concentrator Plant COMPANY/YEAR : FONDEF and Codelco Chile, Andina Division, 1994-

1997 PROJECT : Development of an Ultrasonic Comminuting Device for

the Ore grinding COMPANY/YEAR : FONDEF, 1994-1997

PROJECT : Development of Methods to Control the Acid Mist at

the EW Tankhouse COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1994-1995 PROJECT : Dynamic Simulators for Grinding and Flotation

Processes COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1994 PROJECT : Instrumentation and Control of Flotation Froths:

Froth Model Development COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1994 PROJECT : Potentiodynamic Evaluation of the Electrolyte Quality

and its Effect in the EW Circuit COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1991-1993 PROJECT : Development of an Improved Mechanical Rupture

Method to Recover Organics from Cruds in SX Plants COMPANY/YEAR : Codelco Chile, Chuquicamata Division, 1991-1993 PROJECT : Control of Froth Stability and Composition at El

Teniente Concentrator COMPANY/YEAR : Codelco Chile, El Teniente División, 1992-1993 PROJECT : Feasibility Study to Use Tower Mill to Regrind the

PTR Concentrates COMPANY/YEAR : Codelco -Chile, División Chuquicamata, 1992-1993 PROJECT : Calculation of Extractant Balance Including Oxime

Degradation at Chuquicamata SX Plant COMPANY/YEAR : Codelco -Chile, Chuquicamata Division, 1993 PROJECT : Assistance to Commissioning the Crud SX/CMD Plant

at El Soldado COMPANY/YEAR : Codelco -Chile, Chuquicamata Division, 1993

PROJECT : Crushability Study at Minera El Abra COMPANY/YEAR : Codelco -Chile, Chuquicamata Division, 1993 PROJECT : Technical Defense of the New Coalescer System

Patent Application in Chile COMPANY/YEAR : Codelco -Chile, Chuquicamata Division, 1993 PROJECT : Technical and Economical Analysis API PTR Plant El

Teniente Division COMPANY/YEAR : Codelco – Chile, Chuquicamata Division, 1993 PROJECT : Design of a Semi Continuous Copper Leach Reactor

Using the System NH3/CO2/Air COMPANY/YEAR : Codelco -Chile, Chuquicamata Division, 1993 PROJECT : Study on the Relationship between Composition of the

Organic Solution and Phase Disengagement COMPANY/YEAR : Codelco -Chile, Chuquicamata Division, 1993 El

Teniente, 1988-1989

TRAINING Given Courses NAME : Ore Leaching Theory and Prectice”, Curso Regional

Capacitación para Aplicaciones de Radiotrazadores en Procesos Minero Metalúrgicos y del Medio Ambiente Relacionado

PLACE : Cchen, Santiago, Chile, Marzo 24, 2008 ATTENDANTS : NAME : Copper Mining: Process, Persons and Organisations PLACE : Taller de Metalurgia Extractiva de Heindrick & Struggles ATTENDANTS : NAME : Postgraduate Diploma in Mining Operation Management,

Hydrometallurgy block, Catholic University of Chile PLACE : Codelco Chile, Termas de Cauquenes, 2006 and 2007 ATTENDANTS : Codelco Chile Professionals NAME : Topics in Modern Hydrometallurgy of Copper and Seminal:

Fire Hazard in Solvent Extraction Plants PLACE : HydroCopper 2005 – Hotel Sheraton, Santiago, Chile NAME : Copper Hydrometallurgy PLACE : Copper 2003 – Hotel Sheraton, Santiago, Chile NAME : Tools for Planning, Optimization and Control in Heap

Leaching Operations PLACE : Training Course, Compañía Minera Doña Inés de Collahuasi,

Iquique, 2005 NAME : Mining Sciences PLACE : Chile-Science 2000 Meeting, Diego Portales Convention

Center, Santiago-Chile, June 2000

NAME : Mathematical Tools in Ore Crushing PLACE : The Institute of Mining Engineers, Iquique, 2000 ATTENDANTS : Engineers, operators, academics and students. NAME : Bioleaching of Sulfide Ores PLACE : The Institute of Mining Engineers, Iquique, 2000 ATTENDANTS : Engineers, operators, academics and students. NAME : Heap Leaching Hydrodynamics PLACE : The Institute of Mining Engineers, Iquique, 2000 ATTENDANTS : Engineers, operators, academics and students. NAME : Scale Up in Heap Leaching PLACE : The Institute of Mining Engineers, Iquique, 2000 ATTENDANTS : Engineers, operators, academics and students. NAME : Heap Stacking PLACE : The Institute of Mining Engineers, Iquique, 2000 ATTENDANTS : Engineers, operators, academics and students. NAME : Ore Agglomeration in Rotary Drums PLACE : The Institute of Mining Engineers, Iquique, 2000 ATTENDANTS : Engineers, operators, academics and students. NAME : Control of Heap Leaching Operations PLACE : Minera Michilla S.A., Antofagasta, 2000 ATTENDANTS : Engineers and operators. NAME : Crushing and Screening PLACE : Minera Michilla S.A., Antofagasta, 2000 ATTENDANTS : Engineers and operators. NAME : Dynamic Fundamentals in Mineral Processing PLACE : University of Concepcion/Met. Engng. Department ATTENDANTS : Graduated M.Sc./D.Sc. Met. Engrs. Students.

NAME : Solvent Extraction and Electrowinning Technology PLACE : Iquique, IIMCh, 1998 ATTENDANTS : Engineers, operators, academics and students. NAME : Autogenous and Semi-Autogenous Mill Modelling PLACE : University of Concepcion, regular course, 1988 ATTENDANTS : Pre and Post Graduate Student in Met. Engng. NAME : Analysis and Optimization in Crushing – Agglomeration –

Heap Leaching Operations PLACE : Empresa Minera Manto Verde, Copiapó, 1997 ATTENDANTS : Engineers and operators. NAME : Tools to Optimize Grinding Circuits PLACE : Metalúrgica Peruana, Perú, 1997 ATTENDANTS : Engineers and operators. NAME : Grinding Circuits Optimization PLACE : Empresa Minera Manto Verde, 1996 ATTENDANTS : Engineers and operators. NAME : Advanced Topics in SX-EW PLACE : Empresa Minera Manto Verde, 1996 ATTENDANTS : Engineers and operators. NAME : Special Topics in Mineral Comminution PLACE : Cyted, 1995 ATTENDANTS : Engineers, operators, academics and students. NAME : Statistical Adjustment of Metallurgical Balances PLACE : University of Concepcion, 1994 ATTENDANTS : Engineers and Met. Engng. Students. NAME : Scale Up in Leaching Systems PLACE : University of Concepcion, 1994. ATTENDANTS : Engineers and Met. Engng. Students.

NAME : Metallurgical Processes III (Advanced Level) – 5

Consecutive Semesters since 1992 PLACE : USACH/Depto. Ing. Metalúrgica ATTENDANTS : Met. Engng. Students. NAME : SAG Milling: Theory and Practice (Co-Speaker with

Professor Leonard Austin Penn State University, UNDP Sponsorship), CIMM, 1990

ATTENDANTS : Engineers, Operators, Academics and Students. NAME : Advances in Comminution: High Pressure Grinding Roll (Co-

Speaker with Professor Klaus Schönert, Clausthal University, UNDP Sponsorship), CIMM, 1990

ATTENDANTS : Engineers, Operators, Academics and Students. NAME : Mathematical Modeling of Metallurgical Processes (Co-

Speaker with Professor Leonard Austin, Penn State University), 1985.

ATTENDANTS : Post Graduate Students Mineral Science Engineering, The Pennsylvania State University.

NAME : Process Engineering in Size Reduction (Co-Speaker with

Professors L.G. Austin, R.R. Klimpel & F.J. Concha), University of Concepcion, 1984

ATTENDANTS : Engineers, Operators and Students. NAME : Design and Optimization in SAG and Ball Milling (UNDP

and Peruvian Government), Geological, Mining and Metallurgical Institute, Lima-Peru.

ATTENDANTS : Engineers, Operators, Academics and Students. NAME : Mathematical Models for Grinding ad Flotation Processes

(Co-Speaker with Professor Leonel Gutiérrez – CIMM), Metallurgical Engineering Department, University of Atacama, Copiapo (1983).

ATTENDANTS : Metallurgical Engineering Students.

NAME : Application of Spectroscopy Techniques to

Hydrometallurgy Challenges, Extraction Division /Cía. Cobre Chuquicamata (1977)

ATTENDANTS : Engineers and Operators. NAME : Surface Phisico Chemistry (Level 500), Sciences

Faculty/University of Chile, 1976 ATTENDANTS : Chemistry Students. NAME : Solvent Extraction Processes (Level 500), Sciences

Faculty/University of Chile, 1976 ATTENDANTS : Chemistry Students.

THESIS ADVISOR - Peñaloza E., "Study and Application of Phenomenological Modelling and

Computer Tools to Compute Production at Leaching Plants", Met. Engr., San Agustín de Arequipa National University, Perú – 2006.

- Brito J., "Conceptual Analysis of the Lagrange Multiplier Technique to Adjust Material Balances in Hydrometallurgical Plants", University of Atacama, 2001.

- Catoni M., "Development of a Model to Evaluate Grinding Media at Industrial Scale", Met. Engr., USACH, 1997.

- Magne L., "Mass Transport Model in SAG Mills", Ph.D. Thesis Met. Engng., University of Concepción.

- Cisneros A., "Electrochemical Study for the Enargite Flotation in Mineral Systems", Chem. Engr., USACH, 1992.

- Olivares I., "Differential Flotation of Enargite and Chalcopyrite", Met. Engr., USACH, 1993.

- Magne L., "Optimum Ball Make Up in Ball Mills”, M.Sc. Thesis, University of Concepcion, 1992.

- Ortiz M., "Optimizing the Flotation Process through Electrochemical Variables”, Met Engr., USACH, 1989.

- Perigault G., “Cathodic Protection in Ball Mills against Corrosion", Mechanical ENSR., University of Chile, 1989.

- Améstica R., “Development of a SAG Model for Automatic Control Purposes", Electrical Engr., M.Sc: Elect. Engng., University of Chile, 1994.

- Guevara F., “Mechanical and Metallurgical Modelling of the High Pressure Grinding Roll", Mechanical Engr., University of Chile, 1990.

- Contreras J., “Evaluation of Non-Traditional Options to Increase Molybdenum Recovery", Met. Engr., USACH, 1987-1988.

- Barría J., "Study of Catodic Protection Options in the Wet Ball Milling", Met. Engr., USACH, 1987-1988.

- Bossel F., “Study on Activation Mechanisms in the Flotation of Sulfide Ores". B.Sc: Chemistry, University of Chile, 1987-1988.

- Jofré J., "Variable-Optimization in Batch and Continuous Ball Milling", Met. Engr., USACH, 1986-1988.

- Manríquez L., "Development of a Mathematical Simulator for Crushing Plants", Met. Engr., USACH, 1986-1988.

- Reyes C., "Impact of Pulp Rheology in the Rod Milling Efficiency". Met.

Engr., USACH, 1987-1988. - López I., "Electrochemical Flotation of Chalcopyrite", Met. Engr.,

University of Atacama, 1988-1989. - Cuhadaroglu, Mehmet, "An Investigation on the Grinding of Large

Particles in Ball Mills", PSU Research, M.Sc. Thesis Mineral Engng., 1986. - Mendoza M., "Development of a Mathematical Model for Heap

Leaching", Met. Engr., University of Concepción, 1983. - Arriagada V., “Ionic Exchange Application for Copper recovery from

Mantos Blancos Effluents", Met. Engr., USACH, 1984-1985. - Guajardo R., “Development of Depressant Reagents in Mineral

Flotation", B.Sc: Chemistry Thesis, University of Chile, 1982-1983. - Cruz A., "Co-Extraction of Copper and Molybdenum with Oxime

Extractants", Met. Engr., Technical State University, 1974.

INVENTION PATENTS He has been envolved in about 25 invention patents in the extractive metallurgy field. The most relevant, some applied at industrial scale are as follows: -. Procedure to Restore Phase Disengagement Response and Reduce

Contamination in the Electrolyte in Solvent Extraction Plants for Copper and Other Common Metals through Addition of an Acid Sodium Sulfate Solution with or without other Saline Compounds, Chi. Pat. Application N°2265, August 2002. Sodium sulfate solution is added to the organic phase thus increasing notably the phase disengagement.

-. Procedure to Remove Aqueous Entrainment, Cruds and Solid Particles

from Organic Effluents in Solvent Extraction Plants and Improve of the Physico-Chemical Properties, Chi. Pat. Application N°1868, August 2002. Dirty organic solution is recycled through a coalescer filled with natural ligno-cellulose materials, previously activated thus producing fast and clean phase separation.

-. Procedure to Restore Physico-Chemical Properties of Organic Solutions

in Solvent Extraction Plants for Copper and Other Common Metals, Chi. Pat. Application N°1909, August 2002. Organic solution is circulated through a plate filter containing activated and fine-size natural ligno-cellulose materials. Fast phase disengagement is obtained as final result.

-. Batch Bed Leaching Assisted by In Situ Agglomeration, Chi. Pat.

Application N°00987, 1998. Leach procedure where poly electrolyte solutions are added to improve permeability and recovery of the valuable elements.

-. Process to Inhibit Silica Dissolution in the Acid Leaching of Copper

Silicate Ores, Chi. Pat. Application Nº71-78, Feb. 1978. This process of acid curing is one of the outstanding features in most of the modern acid leach technology. It particularly made possible the economical

beneficiation of the Mina Sur orebody, property of Codelco Chile and today it is of standard use everywhere.

-. Method to Recover Organic Solution from Cruds in Solvent Extraction

Processes, Chi. Pat. Nº30.876, January 1979. This procedure was standard for about twenty years and it represents even today an efficient way to recover organic solution from cruds.

-. Process to Reduce Crud Appearance in Solvent Extraction Systems by

Adding Fine Solids, Chi. Pat. Nº206.824 (1977). Methodology broadly used at SX plants; reinvented in 1981 by Magma Copper/San Manuel. The Chilean patent was never commercialized.

-. Acid Pretreatment Process to Increase Floatability of Metallic

Sílfides, Chi. Pat. Application Nº869.87 (1987). One of the few successful applications of the electrochemistry in the flotation. A success trial was performed at 40,000 tons/day increasing both recovery and concentrate grade. Quite useful to beneficiate chalcopyrite ores with acid gangue.

-. Process for Iron Removal from Acid Leach Solutions, Chi. Pat.

Application Nº225.78 (1978). Process to purify leach solutions previous to the application of the copper solvent extraction in Chile. It was succesfully used in Chuquicamata in 1977 to remove iron from the leach solutions.

-. Procedure and Device to Fracture Materials within an Accoustic Field,

Chi. Pat. Application Nº17772.96, 1996. New process and equipment for particle size reduction in a vibrating high pressure roll mill with advantages in energy consumption, size distribution and purity of product.

-. Un Procedimiento para Remover Arrastres de Acuoso, Crud y Sólidos

desde Efluentes Orgánicos de Plantas de Extracción por Solventes y Mejoramiento de sus Propiedades Físico.Químicas, Sol. Pat. Chi. N°1868, Ago. 2002. La fase orgánica sucia se hace circular a través de un coalescedor relleno con materiales ligno celulósicos naturales, los que

han sido previamente activados, lo que induce la coalescencia de las gotas de acuoso y retención de los sólidos por contacto con el lecho.

-. Procedimiento para la Restauración de las Propiedades Físico-Químicas

del Orgánico de Operación en Plantas de Extracción por Solventes de Cobre y de Otros Metales Comunes, Sol. Pat. Chi. N°1909, Ago. 2002. La fase orgánica con separación de fases deficiente, se hace circular a través de un filtro de placas, que contiene una precapa formada por materiales ligno celulósicos naturales de fina granulometría y químicamente activados. Como resultado se obtiene un orgánico altamente4 restaurado en sus propiedades de separación de fases.

-. Método de Lixiviación en Lecho FijoAsistido por Aglomeración In Situ,

Sol. Pat. Chi. N°00987, 1998. Procedimiento de lixiviación en que se adicionan poli electrolitos en la solución de riego de pilas o bateas, para mejorar el escurrimiento y por tanto la extracción del metal que se lixivia..

-. Un Proceso para Reducir la Disolución de Sílice en la Lixiviación Ácida

de Menas Silicatadas de Cobre, Sol. Pat. Chi 71-78, Feb. 1978. Este proceso (curado ácido) es uno de los pilares sobre los cuales descansa la Tecnología Moderna de Lixiviación de Lechos de Minerales; posibilitó el Beneficio Económico de la Mina Sur de Codelco y su uso es hoy generalizado en la mayoría de las operaciones de lixiviación..

- Un Método de Tratamiento del CRUD para Recuperar la Solución

Orgánica en Procesos de SX, Pat. Chi. 30.87, En. 1979. Este procedimiento constituye una tecnología estándar en plantas de SX y es una forma eficiente de recuperar el orgánico desde el crud.

- Proceso para Reducir la Formación de CRUD y los Altos Arrastres en

Extracción por Solventes. Pat. Chi 206.824 (1977). Metodología de uso generalizado en las Plantas Industriales de extracción por solventes de cobre del mundo. Re-inventada en 1981 por Magma Copper/San Manuel. Esta patente nunca se comercializó y a esta fecha está vencida.

- Un Proceso para Aumentar la Flotabilidad de Sulfuros Metálicos

Aplicado a Minerales Secos, Sol. Pat. CHI. 869.87. Una de las pocas

aplicaciones exitosas a nivel mundial de la Electroquímica de Flotación. En Sewell se corrió la planta completa a 40.000 toneladas, incrementando recuperación y ley de cobre, simultáneamente. Útil en la Flotación de Menas Calcopiríticas Refractarias.

- Un Proceso para la Remoción de Hierro desde Soluciones de Lixiviación

Ácida, Sol. Pat. Chi. 225.78 (1978). Proceso de purificación química de soluciones anterior a la extracción por solventes. Se aplicó exitosamente en Chuquicamata en 1977 para remover Fe desde soluciones de Lixiviación Ácida de las Bateas. Se dejó de usar por razones de costo y disponibilidad del fosfato precipitante.

- Un Procedimiento de Fractura de Materiales Asistida por un Campo

Acústico, Sol. Pat. Chi. 17772.96, 1996. Nuevo proceso y equipo para la reducción de tamaño en molinos de rodillos vibrantes en la frecuencia de los ultrasonidos, con ventajas de consumo de energía y perfil granulométrico de producto.

SOFTWARE DEVELOPMENT -. BioLeach®, It is a dynamic heap bioleaching simulator. It handles

differential equations for the liquid transport through variable-saturation porous media as well as air transport by forced convection, solute transport in the gas and liquid phases, bacterial growth and heat transport. It has been successfully applied at several industrial bioleaching operations, 2007.

-. Filter Sim®, Dynamic simulator of filter plants useful for design,

optimization and control purposes. It has been successfully applied at Patache Filter Plant, property of Compañía Minera Doña Inés de Collahuasi, 2003.

-. Pro2PTMP® 1.0, Plant production simulator; It has a phenomenological

frame, particularly the liquid transport through a variable-saturation porous media. It has been successfully used at Chuquicamata Heap Leach Plant, 2004.

-. Pro2.Hidronorte®, Plant production simulator; It has a phenomenological

frame, particularly the liquid transport through a variable-saturation porous media. It has been successfully used at Radomiro Tomic Heap Leach Plant, 2003.

-. LIX ROM V 1.2®, Dynamic Simulator for El Abra ROM production and

copper and acid concentration in the effluent solution. Delphi Platform, 2004.

-. LeachSim v1.0®, Dynamic Simulator for Compañía Minera Doña Inés de

Collahuasi Plant. Calculation of copper production, acid consumption and copper and acid concentration in the effluent solution, 2003.

-. DUMP LEACH v1.0®, Codelco Chile, 2002. Dynamic simulator useful to

design and optimize industrial dump leach operations. It may handle stacking in several floors and phases as well as different stacking and irrigation calendars.

-. HYDROMET v1.0®, Codelco Chile, 2002. Process simulator including

mine-to-leach platform. Crushing, primary heap leaching, secondary ripio leaching and ROM leaching, SX and EW processes are considered. It includes expert system rules to decide dynamic optimum operational conditions.

-. RIPIO-RT v2.0®, Codelco Chile, 2001. Dump secondary ripio leach

simulator. It includes expert system rules to decide dynamic optimum operational conditions along the time.

-. MODEEM v1.0®, Codelco Chile, Chuquicamata Division, 1999. Geo-

hydrometallurgical model used to set production programs based on the Mine Program and experimental results from forecast lab test assayed in drill core samples.

-. OPTIMIZA v1.0®, DRM, 1998. Simulator for grinding and classification

foccused on the optimization of ball make up. -. BALMET v1.0 y v2.0®: Adjustment of Material Balances at El

Salvador Concentrator. 1978-1979 y 1983. Application of the Simplex Direct Search algorithm by Nelder y Mead to distribute statistical residuals.

-. BALMET v1.0®: Ajuste Balance Metalúrgico Concentradora División

Chuquicamata. 1980-1981. Application of the Lagrange Multipliers technique to distribute residuals.

-. RTD Deconvolution in Circuits with Recycle®. PNUD Chi/88/011, 1989-

1992. Model to interpret RTD results at any system with recycle. -. SAG Mill Model®. PNUD Chi/088/011 (SIMUSAG y OPTISAG), 1989-

1993. Phenomenological model for SAG and FAG milling. -. Mechanical and Metallurgical High Pressure Grinding Roll Simulator®.

PNUD Chi/88/011, 1990-1992. One of the first physical models for the HPGR.

PUBLICATIONS -. J. Menacho, “The Extractive Metallurgy of Copper in the Twenty First

Century”, Proceeding First Meeting on Minor Element Contaminants in Copper Metallurgy”, University of Concepcion, Concepcion, Chile, October 2007.

-. J. M. Menacho, “Industrial Practice and Control of Entrainments and Degradation in Chilean SX Plants” - Pre Conference Hydrometallurgy Short Course, 6th International Copper Conference Copper 2007, Canada 2007.

-. Menacho J. and Zivkovic Y., “A Novel Physical Method to Calibrate PLS Flowrate at Industrial SX Plants”, Proceedings IV International Copper Hydrometallurgy Workshop, Viña del Mar, Chile 2007.

-. Menacho J. and Chávez P., “A Novel Method to Optimize Crushing Circuits at Heap Leaching Operations”, Proceedings IV International Copper Hydrometallurgy Workshop, Viña del Mar, Chile 2007.

-. Menacho J. , “An Overview of Innovations in Copper Extractive Metallurgy up to the Year 2050”, Plenary Session, Proceedings IV International Copper Hydrometallurgy Workshop, Viña del Mar, Chile 2007.

-. J.M. Menacho, L.E. Gutiérrez and P.A. Chávez, “Matching Theory and Practice in Heap Leaching Processes”, Proceedings 6th International Copper Conference, Canada 2007.

-. J.M. Menacho, L.E. Gutiérrez and E.A. Peñaloza, “Filter.Sim: A New Tool to Optimize Industrial Filtering Plants”, Proceedings 6th International Copper Conference, Canada 2007.

-. Menacho J. M., Gutiérrez L.E. and Chávez P.A. “Breaking Paradigms in Heap Leaching Processes” Proceedings International Workshop on Metallurgical Processes, Hydroprocess 2006.

-. Menacho J. y Gutiérrez L. “Scale Up in Heap Leaching: Abiotic Systems” Proceedings III International Copper Hydrometallurgy Workshop, 2005.

-. J.M. Menacho, C. Hurtado-Guzmán “Solvent Extraction Recovery of Copper”, Proceedings International Conference Copper 2003.

-. J. Menacho Ll. and Y. Zivkovic D. “Acid Leaching of Copper Ores”, Proceedings International Conference Copper 2003.

-. Menacho J., Gutiérrez L. y Zivkovic Y. “Dynamic Model to Control

Chloride in SX Plants”, Minerales, Volume 57, Nº 248, November – December 2002.

-. Menacho J., Ortiz C., Zivkovic Y. y Droguett M., “Heap Leaching Digital Simulation”, Minerales, Volume 56, Nº 239, May – June 2001.

-. Menacho J. y Zivkovic Y, “Hydrodynamics of Mixer-Settlers at Industrial SX Plants”, Minerales, September – October 1999.

-. Magne L., Valderrama W., Pontt J., Gutiérrez A., Menacho J., “Conceptual Overview and State-of-the-Art in SAG Milling”, Minerales, Institute for Chilean Mining Engineers, Vol. 52 Nº 218, 1997.

-. Menacho J. y Zivkovic Y., ¿How Can Be Determined Whether a New Procedure or Apparatus is Patentable?, Minerales (The Institution for Chilean Mining Engineers), Vol. 54(226), pp 29-38, 1999.

-. Menacho J. y Zivkovic Y., "Physical versus Chemical Extractant Loss in SX Plants", CONAMET IX/IBEROMET IV, CCHEN, Santiago-Chile, 28-31 Oct. 1996.

-. Menacho J. y Yadranka Z., "A Methodology Contribution to Verify Inventive Level for a New Procedure or Apparatus", CONAMET IX/IBEROMET IV, CCHEN, Santiago-Chile, 28-31 Oct. 1996.

-. Menacho J. and Zivkovic Y., "Emulsion Formation and its Control in Solvent Extraction Plants", Chemical Metallurgy Vol. III, IV Meeting of the Southern Hemisphere on Mineral Technology, University of Concepcion, Concepción-Chile, Nov. 1994.

-. Menacho J. y Zivkovic Y., "Crud Appearance and Control at Industrial SX Plants", Procedings 45a Annual Convention of The Institute for Chilean Mining Engineers, Copiapó, Nov. 1994.

-. Magne L., Barría J., Améstica R., Menacho J., “Analysis of Operacional Variables in SAG Milling”, Remetallica, Met. Engng. Department, University of Santiago, Chile, Vol. 8, 1993

-. Jorge Menacho, Javier Jofré y Yadranka Zivkovic, "The Apparent Wear Rate for Grinding Media", Proceedings VIII Symposium on Mineral Processing, ARMCO, Chile, 1993.

-. Magne L., Améstica R., Barría J. y Menacho J., “Dynamic Model for SAG Milling based on a Simple Phenomenological Model”, Rev. Metal. Madrid, 31(2), 1995.

-. Améstica R., Barría J., Magne L., Jofré J., Menacho J., “Dynamic

Modelling for SAG Milling”, Minerales, The Institute for Chilean Mining Engineers, Vol. 47 Nº 199, 1992.

-. Rodrigo Améstica, Jorge Barría, Oscar Castro, Jorge Menacho, "Modelling the Discharge System in a SAG Pilot Mill", 42a Annual Convention of The Institute for Chilean Mining Engineers, Concepcion, 1991

-. Claudia Yerkovic, Francisco Bossel, Jorge Menacho, Luis Gaete, "Advances in Comminution: Application of Ultrasonics to Ore Fracture”, 42a Annual Convention of The Institute for Chilean Mining Engineers, Concepcion, 1991.

-. Menacho J., "Evaluation of the Critical Mining and Metallurgical Mass for Technology Development in Chile", Proceedings II Workshop on Mining Technology, The Mining Minister, Ed. Iván Valenzuela, Gráfica Nueva Era. pp 87-100, Sept. 1993.

-. Jorge Menacho, "The Concentrator in the Year 2010", Proceeding VI Symposium on Grinding, ARMCO Chile Mineral Processing, Viña del Mar, 1990.

-. Javier Jofré, Jorge Menacho, "A New Non-Linear Mathematical Model for Grinding of Ores", Proceeding First Ibero-American on Material and Metallurgical Engineering and Sixth National Congress on Metallurgy, IBEROMET Santiago, 1990.

-. Jorge Menacho, Juan Reyes, "The Tower Mill as Option to Regrind Copper Concentrates", Proceedings V Symposium on Grinding, ARMCO Chile, Viña del Mar, November 2-6, 1987.

-. Jorge Barría, Ramón Guajardo, Christian Hecker, Jorge Menacho, "Reduction in Steel Consumption in the Wet Grinding of Ores through Imposed Current", 39a Annual Convention of The Institute for Chilean Mining Engineers, Punta Arenas, Nov. 1988.

-. Ramón Guajardo, Jorge Menacho, Francisco Bossel, Miguel Ortiz, "Experimental Correlation between Electrochemical Potential and Flotation Response of Sulfides", 39a Annual Convention of The Institute for Chilean Mining Engineers, Punta Arenas, Nov. 1988.

-. Jorge Menacho, Juan Reyes, Julio Brito, Javier Jofré, "Comparison between Phenomenological Grinding Models and Simple Bond-Type Models", 39ª Annual Convention of The Institute for Chilean Mining Engineers, Punta Arenas, Nov. 1988.

-. Jorge Menacho, "Developments in Crushing Technology", EXPOMIN

Santiago, 1990. -. Jorge Menacho, "Mathematical Basis to Phenomenological Modelling of

SAG and FAG Milling", Minerales, Vol. 42 Nº 179, July-August-September 1987.

-. Jorge Menacho, "Mineral Processing Technology: State-of-the-Art", Proceedings I Workshop on Mining Technology, Ed. Min. Minería, Gráfica Nueva Era, pp 98-103, March 1993.

-. R. Guajardo, J. Menacho, F. Bossel y M. Ortiz, "Electrochemical Control of Sulfide Flotation Processes", 39ª Annual Convention of The Institute for Chilean Mining Engineers, Punta Arenas 1988, Chile.

-. Yerkovic C., Menacho J. y Gaete L., "Ultrasonics: A New Comminution Technology?", Proceedings V Chilean Symposium for Computing Applications in the Mining Industry, Expomin'92, Santiago-Chile, May 1992.

-. J. Jofré, J. Barría, J. Menacho; "Application of Simplified Models to Simulate Comminution Processes", 42ª Annual Convention of The Institute for Chilean Mining Engineers, 1991.

-. R. Améstica, J. Barría, O. Castro y J. Menacho; "SAG Mill Modelling: Mechanistic Approach with Implementation Advantages", 42ª Annual Convention of The Institute for Chilean Mining Engineers, 1991.

-. P. Navarro, J. Ormeño, J. Barría, L. Magne y; J. Menacho "Use of Corrosion Inhibitors to Reduce Grinding Media Consumption”, 42ª Annual Convention of The Institute for Chilean Mining Engineers, 1991.

-. F. Guevara, J. Menacho: "Methodology to Determine Optimal Conditions in High Pressure Grnding Rolls", 42ª Annual Convention of The Institute for Chilean Mining Engineers, October 1991, Concepción-Chile.

-. Menacho J., Reyes J. and Austin L.G., "Fracture Mechanism for Big Lumps in SAG and FAG Milling, Presentation to Annual Convention of The Institute for Chilean Mining Engineers, Copiapó, November 1986.

-. Menacho J., Reyes J. and Austin L.G., "Scale Up of Kinetic Parameters in SAG/FAG Milling", Presentation to Annual Convention of The Institute for Chilean Mining Engineers, Copiapó, November 1986.

-. Soto B. y Menacho J.: "Metallurgical Balances", Seminar on Metallurgical Balances, Codelco Chile, El Salvador, May 1980.

-. Soto B., Menacho J. y Ríos O.: "Comparison of Different Options to

Adjust Metallurgical Balances", Proceedings I Congreso on Porfidic Copper Ores, November 1980.

-. Jorge Menacho, Leonard Austin y Mehmet Cuhadaroglu, "Improved Control of the Finish Grinding Process in Cement Manufacture", The Pennsylvania State University. Mineral Processing Section University Park, PA 16802, July 1986.

-. F. Guevara y J. Menacho, "Phenomenological Modelling for High Pressure Grinding Rolls", Proceedings V Chilean Symposium on Computing Application to Mining Industry, EXPOMIN'92, Santiago-Chile, May 1992.

-. Menacho J. y Broitman J., "IX versus SX to Treat Copper Leach Solutions", 34a Annual Convention of The Institute for Chilean Mining Engineers, Rancagua-Chile, October 1983.

-. Menacho J. y Concha F., "Ball Charge Optimization in Rotary Mills", 2nd

National Congress on Metallurgy, Santiago-Chile, October 1984. -. Cruz A. y Menacho J.: "Poisoning of Oxime Copper Extractants”, 1st

National Congress on Metallurgy, Santiago-Chile, November 1979. -. Menacho J.: "Coalescence Phenomena in Solvent Extraction Processes",

III Seminar on Surface Chemistry and Flotation, Concepción-Chile, 1977. -. Menacho J. y Córdova A.: "Presence of Solid Emulsifiers in SX

Operations, III Seminar on Surface Chemistry and Flotation, Concepcion-Chile, 1977.

-. Fuentes J. y Menacho J.: "Compatibility between Flocculants and SX Process", II Seminar on Surface Chemistry and Flotation, Catillo-Chile, December 1975.

-. Jorge Menacho, Mario Riveros, Bernardo Soto, Héctor Soto, "Metallurgical Balance Adjustment in Concentrator Plants", Proceeding I Latinoamerican Congress on Flotation, Concepcion-Chile, 1979.

-. Jorge Menacho: "Transformation Balances: Key in Process Control", Natural Resources, 1979.

-. Bernardo Soto y Jorge Menacho: "Metallurgical Balances in Flotation of Ores", Difussion Magazine, 1980.

-. Bernardo Soto y Jorge Menacho: "Metallurgical Balances in Flotation of Ores", Reverberatory Magazine (Technical State University of Chile), Nº 48, 1981.

-. Magne L., Améstica R., Barría J., Menacho J., “Dynamic Modelling for

SAG Milling Based on a Simplified Phenomenological Model”, Metallurgy Magazine, Scientific Research Superior Board, Nacional Center for Metallurgical Research, Madrid, España, Vol. 31, Nº 2, 1995.

-. Magne L., Jofré J., Barría J., Menacho J., “Scale Up in Flotation by Using the RTD Concept”, Metallurgy Magazine, Scientific Research Superior Board, Nacional Center for Metallurgical Research, Madrid, España, Vol. 31, Nº 1, 1995.

-. Yerkovic C., Menacho J. and Gaete L.,"Ultrasonics: A New Way to Break Minerals", Min. Engng. Vol. 6 (6), April 1993.

- F. Guevara; L.G. Austin; J. Menacho: "A Model for the Simulation of High Pressure Grinding Rolls", Powder Technology.

- F. Guevara J. Menacho: "Mechanical and Metallurgical Modeling of the High Pressure Roll Mill", Proceedings XV Encontro Nacional de Tratamento de Minerios e Hidrometalurgia y III Encontro do Hemisferio Sur sobre Tecnología Mineral, San Lorenzo, Minas Gerais, Brasil, September 13-16, 1992.

- F. Guevara, F. Bossel; J. Menacho: "Pressure Distribution in High Pressure Grinding Rolls", Proceeding 1st Ibero American Congress on Material and Metallurgical Engng., IBEROMET and 6th National Congress on Metallurgy, CONAMET VI, November 1990, Santiago, Chile.

- R. Améstica, J. Barría, L. Magne, J. Jofré y J. Menacho; "Dynamic Simulation of SAG Milling", Proceedings XV Encontro Nacional de Tratamento de Minérios e Hidrometalurgia, III Encontro do Hemisfério Sur Sobre Tecnología Mineral, Sao Lourenço, Brasil, September 1992.

- L. Magne, J. Barría, R. Améstica, J. Menacho, "Evaluation of Operational Variables in SAG Milling" Proceeding 2nd Ibero American Congress on Material and Metallurgical Engng, IBEROMET II, México City, México, November 1992.

- J. Jofré, L. Magne, J. Barría, J. Menacho; "Mechanistic Model for SAG Milling". Proceeding 2nd Ibero American Congress on Material and Metallurgical Engng, IBEROMET II, México City, México, November 1992.

- R. Améstica, G. González, J. Barría, L. Magne, J. Menacho y O. Castro; "A SAG Mill Circuit Dynamic Simulator Based on a Simplified Mechanistic Model", Proceedings XVIII International Mineral Processing Congress, Sydney 23-28, May 1993.

- Menacho J., Vera M., Cisneros A. y Valenzuela R., "Electrochemical

Aspects of the Enargite", Min. Tech., Part A, Vol. I, pp 648, 1992. - Menacho J., Vera M. y Valenzuela R., "Enargite Electrochemistry

(Cu3AsS4)", Proceedings III Encontro do Hemisfério Sur sobre Tecnología Mineral, Minas Gerais, Brasil, Sept. 1992.

- Jorge Menacho and Héctor Hip, "Acid Curing to Activate Floatability of Metal Sulfide Ores", Copper'91 International Conference, Ottawa-Canada, Oct. 1991.

- R. Améstica, G. González, J. Menacho, J. Barría; "On Line Estimation of Fine Coarse Ore, Water, Grinding Rate, and Discharge Rates in Semiautogenous Grinding Mills" Proceedings XVIII International Mineral Processing Congress, Sydney 23-28, May 1993.

- R. Améstica, G. González, J. Menacho, J. Barría; "A Mechanistics State Equation Model for Semiautogenous Mills". Proceedings XIII European Comminution Congreso, Stockholm-Sweden, April 1994.

- Jofré J., Barría J. y Menacho J., "Use of RTD Measurement to Scale Up Flotation Results", 44a Annual Convention of The Institute for Chilean Mining Engineers, Rancagua, October 1993.

- Menacho J., Aliaga W., Valenzuela R., Ramos V. y Olivares I., "Selective Enargite/Chalcopyrite Separation by Froth Flotation", Minerales, Vol. 48 Nº 203, Sept. 1993, pp 33-40.

- Jorge Menacho, Jaime Sepúlveda, "The Concentrator Plant in the Year 2010", I Assian Comminution Congress, Manila-Filipinas, 1990.

- Leonard Austin, Jorge Menacho, Francisco Pearcy, "A General Model for Semiautogenous and Autogenous Milling". APCOM'87. Johannesburg - South Africa, October 1987.

- Leonard Austin, Fernando Concha, Jorge Menacho, "Comminution in the Copper Industry of Chile: State of the Art and Future Research Needs". Conferencia Internacional Copper'87. Viña del Mar-Chile, 28 Nov.-3 Dic. 1987.

- Jorge Menacho, Juan Reyes, Pablo Soto, Javier Jofré, Norbert Patzelt, "The High Pressure Grinding Roll Mill in the Comminution of Ores", Copper'87, CIM/IIMCH, Viña del Mar-Chile, Nov. 1987.

- Jorge Barría, R. Guajardo, J. Menacho y C. Hecker; "Cathodic Protection in Wet Ore Grinding", III Congreso Ibero-Americano de Corrosión y Protección, Brasil, 1988.

- Menacho J., Guajardo R. and Bossel F., "A New Process to Activate

Floatability of Metal Sulfide Ores", XVI Int. Min. Proc. Congress, Stockholm-Sweden, June 1988.

- Concha F., Menacho J. y Santelices L., "Optimization of the Ball Make Up at Industrial Ball Mills", II Encontro do Hemisferio Sur sobre Tecnología Mineral, Río de Janeiro, May 1987.

- Menacho J., "Fundamentals to Phenomenological Modelling of SAG and FAG Milling", II Encontro do Hemisferio Sur sobre Tecnología Mineral, Río de Janeiro, May 1987.

- Menacho J. and Concha F., "Mathematical Model of Ball Wear in Grinding Mills. II General Solution", Powder Technology.

- Austin L.G., Barahona C.A. and Menacho J.M., "Investigations on Autogenous and Semi-Autogenous Grinding in Tumbling Mills", Proc. 1st World Congress Particle Technology, Nuremberg, RFA, April 1986.

- Menacho J., Comment on "A Contribution to Ball Wear and Ball Size Distribution in Tumbling Mills" by L.A. Vermeulen, Powder Technology, 47 (1) 1986, 97-99.

- Menacho J., "Some Solutions of the Kinetics of Combined Fracture and Abrasion Breakage", Powder Technology, 49 (1) 1986, 89-97.

- Austin L.G., Barahona C.A. and Menacho J., "Fast and Slow Chipping-Fracture and Abrasion in Autogenous Grinding", Powder Technology, 46 (1) 1986, 81-86.

- Menacho J. and Concha F., "Mathematical Model of Ball Wear in Grinding Mills. I. Zero-Order Wear Law", Powder Technology, 47 (1) 1986, 87-96.

- Menacho J. y Concha F., "Population Balance Applied to Ball Wear", II Nacional Congreso on Metallurgy, Buenos Aires, Argentina, December 1984.

- Menacho J. y Concha F., "Phenomenological Model for Ball Wear", 4th ARMCO Grinding Congress, Viña del Mar, Chile, November 1984.

- Menacho J., Broitman J., "IX Alternative to SX for the Recovery of Copper from Acid Solutions", CIM Conference, Montreal, Canadá, 1983.

- Menacho J. and Concha F., "Phenomenological Model of Ball Wear in Tumbling Mills", Intern. Min. Proc. Congress, Cannes, France, June 1985.

- J. Menacho, Riveros M., Soto H. y Soto B.: "Adjustment of Metallurgical

Balances at Concentrator Plants", I Latinoamerican Congreso on Flotation, Concepción-Chile, October 1979.

- Cruz A., Lastra M. y Menacho J.: "Sulfuric Leaching of Silicate Ores", 1980's Annual Meeting AIME, Las Vegas-Nevada-USA, February 1980.

- Cruz A., Lastra M. y Menacho J.: "Iron Removal from Leach Liquors by Using Phosphate Compounds", 1980's Annual Meeting AIME, Las Vegas-Nevada-USA, February 1980.

- Córdova A. y Menacho J.: "Phase Disengagement Behavior of Bacterial Leach Solution in SX Plants", International Congress on Mineral Processing, Sao Paulo-Brasil, August 1977.

- Goldfarb J., Rubio J., Bustamante H. y Menacho J., "Dispersibility and Aggregation of Silica and Clay Materials", I Latinoamerican Congreso on Mining and Extractive Metallurgy, Santiago-Chile, August 1973.

PUBLICACIONES EN REVISTAS CON COMITÉ EDITORIAL (REGISTRO EN CURRENT CONTENTS) -. Magne L., Améstica R., Barría J., Menacho J., “Modelización Dinámica de

Molienda Semiautógena Basado en un Modelo Fenomenológico Simplificado”, Revista de Metalurgia, Consejo Superior de Investigaciones Científicas, Centro Nacional de Investigaciones Metalúrgicas, Madrid, España, Vol. 31, Nº 2, 1995.

-. Magne L., Jofré J., Barría J., Menacho J., “Escalamiento de Resultados de Flotación de Minerales a Través de la Función DTR”, Revista de Metalurgia, Consejo Superior de Investigaciones Científicas, Centro Nacional de Investigaciones Metalúrgicas, Madrid, España, Vol. 31, Nº 1, 1995.

-. Yerkovic C., Menacho J. and Gaete L.," Ultrasonics: A New Way to Break Minerals", Min. Engng. Vol. 6 (6), April 1993.

- F. Guevara; L.G. Austin; J. Menacho: "A Model for the Simulation of High Pressure Grinding Rolls", Powder Technology, aceptado para publicación.

- F. Guevara J. Menacho: "Mechanical and Metallurgical Modeling of the High Pressure Roll Mill", publicación Analis XV Encontro Nacional de Tratamento de Minerios e Hidrometalurgia y III Encontro do Hemisferio Sul sobre Tecnología Mineral, San Lorenzo, Minas Gerais, Brasil, 13-16 de septiembre, 1992.

- F. Guevara, F. Bossel; J. Menacho: "Medición de la Distribución de Presión en un Molino de Rodillos de Alta Presión", trabajo presentado en el Primer Congreso Iberoamericano de Ingeniería Metalúrgica y de Materiales, IBEROMET, y Sexto Congreso Nacional de Metalurgia, CONAMET VI, noviembre de 1990, Santiago, Chile.

- R. Améstica, J. Barría, L. Magne, J. Jofré y J. Menacho; "Un Simulador Dinámico de la Molienda SAG basado en un Modelo Fenomenológico Simplificado", presentado en el XV Encontro Nacional de Tratamento de Minérios e Hidrometalurgia, III Encontro do Hemisfério Sul Sobre Tecnología Mineral, Sao Lourenço, Brasil, Septiembre 1992.

- L. Magne, J. Barría, R. Améstica, J. Menacho, "Evaluación de Variables de Operación en Molienda SAG". Presentado en el Segundo Congreso en

Metalurgia e Ingeniería de Materiales, IBEROMET II, Estado de México, México, Noviembre 1992.

- J. Jofré, L. Magne, J. Barría, J. Menacho; "Análisis de la Modelación de Molienda SAG: Desarrollo de un Modelo Mecanístico". Presentado en el Segundo Congreso en Metalurgia e Ingeniería de Materiales, IBEROMET II, Estado de México, México, Noviembre 1992.

- R. Améstica, G. González, J. Barría, L. Magne, J. Menacho y O. Castro; "A SAG Mill Circuit Dynamic Simulator Based on a Simplified Mechanistic Model", XVIII International Mineral Processing Congress, Sydney 23-28, Mayo 1993.

- Menacho J., Vera M., Cisneros A. y Valenzuela R., "Electrochemical Aspects of the Enargite", Min. Tech., Part A, Vol. I, pp 648, 1992.

- Menacho J., Vera M. y Valenzuela R., "Electroquímica de la Enargita (Cu3AsS4)", III Encontro do Hemisfério Sul sobre Tecnología Mineral, Minas Gerais, Brasil, Sept. 1992.

- Jorge Menacho and Héctor Hip, "Acid Curing to Activate Floatability of Metal Sulfide Ores", Copper'91, Ottawa-Canadá, Oct. 1991.

- R. Améstica, G. González, J. Menacho, J. Barría; "On Line Estimation of Fine Coarse Ore, Water, Grinding Rate, and Discharge Rates in Semiautogenous Grinding Mills" XVIII International Mineral Processing Congress, Sydney 23-28, Mayo 1993.

- R. Améstica, G. González, J. Menacho, J. Barría; "A Mechanistics State Equation Model for Semiautogenous Mills". Artículo presentado al XIII Congreso Europeo de Conminución, Stockholm-Sweden, Abril 1994.

- Jofré J., Barría J. y Menacho J., "La Función DTR y el Escalamiento de Resultados en la Flotación de Minerales", 44a. Convención IIMCH, Rancagua, Octubre 1993.

- Menacho J., Aliaga W., Valenzuela R., Ramos V. y Olivares I., "Flotación Selectiva de la Enargita y Calcopirita", Minerales, Vol. 48 Nº 203, Sept. 1993, pp 33-40.

- Jorge Menacho, Jaime Sepúlveda, "El Concentrador del Año 2010", I Congreso Asiático de Conminución, Manila-Filipinas, 1990.

- Leonard Austin, Jorge Menacho, Francisco Pearcy, "A General Model for Semiautogenous and Autogenous Milling". APCOM'87. Johannesburg - South Africa, October 1987.

- Leonard Austin, Fernando Concha, Jorge Menacho, "Comminution in the

Copper Industry of Chile: State of the Art and Future Research Needs". Conferencia Internacional Copper'87. Viña del Mar-Chile, 28 Nov.-3 Dic. 1987.

- Jorge Menacho, Juan Reyes, Pablo Soto, Javier Jofré, Norbert Patzelt, "The High Pressure Grinding Roll Mill in the Comminution of Ores", Copper'87, CIM/IIMCH, Viña del Mar-Chile, Nov. 1987.

- Jorge Barría, R. Guajardo, J. Menacho y C. Hecker; "Protección Catódica en la Molienda de Minerales", III Congreso Ibero-Americano de Corrosión y Protección, Brasil, 1988.

- Menacho J., Guajardo R. and Bossel F., "A New Process to Activate Floatability of Metal Sulfide Ores", XVI Int. Min. Proc. Congress, Stockholm-Sweden, June 1988.

- Concha F., Menacho J. y Santelices L., "Optimización de Recargas de Bolas en Molinos Industriales", II Encontro do Hemisferio Sul sobre Tecnología Mineral, Río de Janeiro, Mayo 1987.

- Menacho J., "Bases Matemáticas para la Modelación Fenomenológica de la Molienda Autógena y Semi-Autógena de Minerales", II Encontro do Hemisferio Sul sobre Tecnología Mineral, Río de Janeiro, Mayo 1987.

- Menacho J. and Concha F., "Mathematical Model of Ball Wear in Grinding Mills. II General Solution", Powder Technology, in Press.

- Austin L.G., Barahona C.A. and Menacho J.M., "Investigations on Autogenous and Semi-Autogenous Grinding in Tumbling Mills", Proc. 1st World Congress Particle Technology, Nuremberg, RFA, April 1986.

- Menacho J., Comment on "A Contribution to Ball Wear and Ball Size Distribution in Tumbling Mills" by L.A. Vermeulen, Powder Technology, 47 (1) 1986, 97-99.

- Menacho J., "Some Solutions of the Kinetics of Combined Fracture and Abrasion Breakage", Powder Technology, 49 (1) 1986, 89-97.

- Austin L.G., Barahona C.A. and Menacho J., "Fast and Slow Chipping-Fracture and Abrasion in Autogenous Grinding", Powder Technology, 46 (1) 1986, 81-86.

- Menacho J. and Concha F., "Mathematical Model of Ball Wear in Grinding Mills. I. Zero-Order Wear Law", Powder Technology, 47 (1) 1986, 87-96.

- Menacho J. y Concha F., "Modelo de Balance Poblacional del Desgaste de

Bolas", II Congreso Nacional Metalurgia, Buenos Aires, Argentina, Diciembre 1984.

- Menacho J. y Concha F., "Modelo Fenomenológico del Desgaste de Bolas", 4_ Congreso ARMCO sobre Molienda, Viña del Mar, Chile, Noviembre 1984.

- Menacho J., Broitman J., "IX Alternative to SX for the Recovery of Copper from Acid Solutions", CIM Conference, Montreal, Canadá, 1983.

- Menacho J. and Concha F., "Phenomenological Model of Ball Wear in Tumbling Mills", Intern. Min. Proc. Congress, Cannes, France, June 1985.

- J. Menacho, Riveros M., Soto H. y Soto B.: "Ajuste de Balances Metalúrgicos en Plantas Concentradoras", I Congreso Latinoamericano de Flotación, Concepción-Chile, Octubre 1979.

- Cruz A., Lastra M. y Menacho J.: "Sulfuric Leaching of Silicate Ores", 1980's Annual Meeting AIME, Las Vegas-Nevada-USA, Febrero 1980.

- Cruz A., Lastra M. y Menacho J.: "Iron Removal from Leach Liquors by Using Phosphate Compounds", 1980's Annual Meeting AIME, Las Vegas-Nevada-USA, Febrero 1980.

- Córdova A. y Menacho J.: "Estudio de Factibilidad de Tratamiento de Soluciones de Lixiviación Bacterial mediante SX", Congreso Internacional Procesamiento Minerales, Sao Paulo-Brasil, Agosto 1977.

- Goldfarb J., Rubio J., Bustamante H. y Menacho J., "Dispersibilidad y Agregación de Sílice y Arcillas", I Congreso Latinoamericano Minería y Metalurgia Extractiva, Santiago-Chile, Agosto 1973.

BOOKS AND MONOGRAPHIES - J. Menacho: "Advances in Mineral Processing: Optimization of Ball

Make Up in Tumbling Mills", Vol. I, 468 págs., Ed. F. Concha, University of Concepcion, 1986.

- F. Bossel; F. Guevara; J. Menacho: "Developments in Residence Time Distribution Modeling", Comminution Monography Series Nº2, UNDP Project CHI/88/011; Technological Development of Comminution in the Chilean Industry, University of Concepcion, May 1992.

- F. Bossel; F. Guevara; J. Menacho: "Mathematical Modeling of High Pressure Grinding Roll", Comminution Monography Series Nº1, UNDP Project CHI/88/011; Technological Development of Comminution in the Chilean Industry, University of Concepcion, August 1991.

- J. Barría, L. Magne, J. Jofré y J. Menacho: "SAG Mill Modelling", Comminution Monography Series Nº7, UNDP Project CHI/88/011; Technological Development of Comminution in the Chilean Industry, University of Concepción, April 1992.

- J. Menacho el al., "Advanced Topics in Ore Comminution”, USACh-DRM Eds., 1990.

- "First Workshop on Mining Technology", The Chilean Mining Ministery, J. Menacho, J. Solari Eds., March 1992.

- Menacho J.: "Ball Wear Model and Optimal Ball Size Distribution in Continuous Tumbling Mills", D.Sc. Thesis, University of Concepcion, May 1985.

- Menacho J.: "Study on Dispersibility and Settling of Silica and Clays", B. Sc. Chemistry Thesis, University of Chile, April 1974.

RELEVANT CONFERENCES AND TALKS - “Process Mining Technology in the Future World”, Curso Regional

Capacitación para Aplicaciones de Radiotrazadores en Procesos Minero Metalúrgicos y del Medio Ambiente Relacionado, Cchen, Santiago, Chile, Marzo 24, 2008.

- “The New Mining Technology for the Next 50 Years”, Post Graduate Academic Year 2007 Closure Ceremony, University of Concepcion, Geology Department, Concepcion, November 2007.

- ”Breaking Paradigms in Heap Leaching Processes”, International Workshop on Metallurgical Processes, Hydroprocess 2006, October 13-15, 2006, Iquique – Chile.

- “Heap Leaching Industrial Technology” Pre-Conference Talk, HydroCopper 2005 Workshop, November 23, 2005.

- “Scale Up in Heap Leaching: Abiotic Systems”, III International Copper Hydrometallurgy Workshop, Santiago of Chile, 2005.

- “Environmental Challenges in Modern Hydrometallurgical Plants”, VI International Conference on Clean Technologies, University of Concepcion, Concepción, Chile, April 18-21, 2004.

- “Oxime Degradation Chemistry in Copper Solvent Extraction Plants”, International Conference Copper 2003, Hotel Sheraton, Santiago of Chile, December 2-3, 2003.

- “Acid Leaching of Copper Ores” International Conference Copper 2003, Hotel Sheraton, Santiago de Chile, December 2-3, 2003.

- “Mine-to-Leaching”: Modern Business Management Tool, II Copper Hydrometallurgy Workshop 2003, University of Chile, Mining Engineering Department, Antofagasta, 21 – 22 August 2003.

- ”Chloride Dynamic Balance in SX Plants”, I Copper Hydrometallurgy Workshop 2003, University of Chile, Mining Engineering Department, Antofagasta, 23 – 25 October 2002.

- Hydrology in Heap Leaching Processes, International Seminar “Technological Innovation in Hydrometallurgy”, Expomin, 2002.

- Optimization of Settler Performance using a Hydrodynamic Approach, International Seminar “Technological Innovation in Hydrometallurgy”, Expomin, 2002.

- ¿Grind or Leach? Hydrometallurgy Menace against Ore Grinding, IX

Simposium on Mineral Processing, Molycop Chile, Termas of Puyehue, November 19 al 23, 2001.

- “Heap Leaching Scale Up”, I Hydrometallugy Plant Operators Coloquium, The Institute for Chilean Mining Engineers, October 2001.

- “¿Will Hydrometallurgy Replace Mineral the Processing Route?”, Presentation to Molycop Chile, May 2001.

- “Exploring New Applications for Aldoxime Copper Extractants”, Zeneca, August 1997.

- “Overview and State-of-the-Art in SAG Technology”, Workshop SAG’97, University of Santiago and Technical University FSM, Viña del Mar, Chile, 1997.

- “Mixer-Settlers Design”, First Regional Meeting on Hydrometallurgy, North Catholique University/Tecnocap Ltd., Antofagasta – Chile, November 25 – 27, 1997.

- “Development of New Solvents for the Copper Mining Industry”, Confidential presentation to the ConCón Oil Refinery, Concón, April 7, 1997.

- “The Laws Driving the Optimal Ball Make Up”, Proceedings VIII Moly-Cop Symposium on Mineral Processing, Termas de Puyehue, Osorno – Chile, November 17-21, 1997.

- “Optimiza 1.0, Integral Simulator for Grinding – Classification Circuits”, MEPSA, Perú, 1997.

- “Corrosion Inhibitors in the Flotation of Copper Sulfide Ores”; Proceedings IV Italo-Brasileiro Congreso on Mining Engineering, Canela, Brasil, 1996.

- “Analysis of Metallurgical Technology Nearing the XXI Century”, Presentation to El Teniente-2000 Project Workshop, July 3 1997.

- “Separation Technologies in the Future Extractive Metallurgy”, I Coloquium on Solid/Liquid Separation Systems in the Mining Industry, Regal Pacific Hotel, Santiago-Chile July 10-11, 1997.

- "Copper Mineral Processing Technology in the XXI Century”, IV Encuentro Minero, Región Tarapacá, Iquique, Nov. 1993.

- “A SAG Mill Circuit Dynamic Simulator Based on a Simplified Mechanistic Model”, Proceedings XVIII International Mineral Processing Congress, Sidney, Australia, 1993.

- “SAG Dynamic Model based on a Simplified Approach”, Proceedings III

Encuentro del Hemisferio Sur Sobre Tecnología Mineral, Sao Lorenço, Brasil, 1992.

- “Advances in SAG Milling: A New Simplified Model”, Proceedings Symposium on Computing Applications in the Mining Industry, APCOMIN’92, Santiago, Chile, 1992.

- "Mineral Processing Technology", I Workshop on Mining Technology, Eds. J. Menacho/J. Solari- The Mining Ministery, Termas of Cauquenes, January 1991.

- “Decreasing Steel Consumption in Wet Grinding by Using Corrosion Inhibitors”, Proceedings I International Congress on Metallurgy, Lima, Peru, 1991.

- “Chemical Corrosion Inhibitors in Wet Grinding”, 42ª Annual Convention Chilean Mining Engineer Institute, Concepcion, Chile, 1991.

- "Past, Present and Future in the Extractive Metallurgy", Talk to the Chilean Mining Engineer Institute IIMCH, Santiago, August 1988.

- "State-of-the-Art in Mineral Processing Technology" a) Technical Board Codelco Chile, Santiago, Nov. 1988 b) Central Office ENAMI, Santiago, Dic. 1988 c) Chuquicamata IIMCH, Chuquicamata, Dic. 1988 - "Needs for New Chemical Reagents in the Copper Extractive

Metallurgy", Invited by the Universidad Mayor San Andrés PNUD, La Paz, Bolivia, January 1991.

- "Technological Trends in the Non-Ferrous Metal Extractive Metallurgy", Invited by the Universidad Mayor San Andrés PNUD, La Paz, Bolivia, January 1991.

- "Metallurgy for the XXI Century", Invited by the Concepcion Bank, El Salvador, August 1990.

- "Technological Support to the Future Mining Projects", invited by the Bank of Concepcion, Crown Plaza Hotel, Invited by the Concepcion Bank, Mining Investor Meeting, Santiago, August 1991.

- Briceño H. y Menacho J.: "Solvent Extraction: Technology, Field of Application and Limitations", Seminar on Technological Research in the Chilean Regions, the Mining and Metallurgical Research Center CIMM, August 1978.

- Jorge Barría, Rodrigo Améstica, Jorge Menacho, "Advances in SAG

Modeling", Seminar on Developments in Copper Extractive Metallurgy, Presented to the Technical Board Codelco Chile, July 1991.