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Sinergies in Electrowinning and Electrorefining

QUALIFICATIONS

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Background and Experience

� More than 30 years experience with specialdedication to non-ferrous hydrometallurgy and electrometallurgy, particualrly in CopperElectrowinnning and Electrorefining.

� Responsibilities include Metallurgy, Operations, Design and Marketing, with special emphasis onTankhouses Retrofitting, Modernization and Upgrading.

� Special development of the Cell Block Conceptaimed to integrate all associated equipments and operational requirements under one single designconcept

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Professional Carrier

� Metallurgical Engineer ( 1978 )� Independent Consultant and President

METALEX ( 1999 to date )� 1995 – 1998 President Ancor N.A. Inc.(USA)� 1992 – 1994 Commercial Manager Ancor

Chile� 1990 – 1991 Project Engineer, Phelps Dodge� 1986 – 1990 Project Engineer, Bechtel� 1979 -1986 Codelco Chuquicamata

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Main Consulting Works

� 2007 Design of New Ni EW Tankhouse with Permanent Cathodes and Acid Mist Capturing Systems, South Africa (active)

� 2007 EPC Demo Plant LIX/SX/EW, Zambia� 2007 Expansion and Modernization of Ventanas

Refinery, Chile� 2007 Expansion and Modernization of

Nkana Copper Refinery, Zambia� 2003 Bid Evaluation Ilo Smelter Modernization Project,

Perú� 2001 Technological Change Chuquicamata Nº 2

Refinery, Chile� 2002 New Mejillones Copper Refinery, Chile

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Scope of Services

� Process and Cathode Quality Auditing� Material and Heat Balances� Design Simulations for Verification of Integrated Cell

Blocks� Design of Hardware� 3D Modelling� CAPEX Review� OPEX Review� Conceptual Designs: New and Upgrades� Inspection Services� Commissioning and Start-Up Assistance to Owner

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Areas of Influence

Design and Supply

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Cell Block Concept

� Electrolytic Cells� Electrodes� Cell Top Furniture� DC Busbars and Power

Supply� Accesories� Integration with other

equipments� Cranes� Ventilation System� Shorting Frame� Handling Equipment

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Electrolytic Cells

� Polymer Concrete� Corrosion Resistant� Electrical Isolation� Integrated Supports� Integrated Feed System� Intergrated Overflows� Integrated Guides� All dimensions needed

by the process� Fully transportable

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Lead Anodes

� Rolled Plates� Calcium-Tin-Lead� Silver-Lead

� Antimonial Lead Full Bar Encapsulation

� Stitch Lead Burning ofPlates to Bars

� Fine Grain Structure� Low Seggregation� No cracks nor Voids� Perfect Flatness

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Anode Accesories

� Minor Airborne Metal Sulphatesand Sulphuric Acid in Tankhouses

� Uniform Cathode Quality� Capture Oxygen Generated� Customized Design and

Fabrication� Easy Assembly� Premium Materials� In-house Material Testing

Facilities� Flexibility For Design

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Cathodes

� 316L, Ti, Al Blanks� Explosion Bonded Process

Provides Maximum BondStrength Between DissimilarMetals

� Excellent CorrosionResistance

� Highest Electrical Efficiency� Full Compliance of

Specifications� World’s Largest Cathode

Supplier

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Edge - Strips

� Customized Design� Customized

Fabrication� Premium Materials� In-house Material

Testing Facilities� Flexibility

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Cell Top Furniture

� Customized Designs� Modular or Full Cell

Length� Accurate Positioning� Premium Materials

� High MechanicalResistance

� High ElectricalResistance

� Corrosion Resistant

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Cell Top Furniture

� Customized Designs� Modular or Full Cell

Length� Accurate Positioning� Premium Materials

� High MechanicalResistance

� High ElectricalResistance

� High ElectricalResistance

� Corrosion Resistant

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Cell Accesories

� Customized Design� Customized

Fabrication� Premium Materials� In-house Material

Testing Facilities� Flexibility

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DC Busbars

� Complete Design� Main Feeder Bus Bars

from T/R Unit i.e. Positive, Negative and Crossover sections.

� Riser Bus bars� Apron Bus Bars� Intercell Bus Bars� Shorting Switches� Flexibles� Maximum output per

cross section� Minimum Electrical

losses in connections

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Short Circuiting Frames

� Customized Design� Flexible Contacts� Maximum Current

Carrying Capacity� Lowest Temperature

Increase at MaximumCurrent Density

� Shortest installationtime

� Accurate Positioning

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Transformer/Rectifiers

� Single floor fabrication –All in One Shop

� Own Oil FilledTransformers

� Complete Auto-Cad and 3-D Design

� Full Shop Test� CSA Certified� UL Listed

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Cathode Stripping Machines

� 50 years world leader in custom engineering & fabrication of process materials handling equipment.

� Integrated systems solution provider to Copper, Nickel, Cobalt & Zinc refineries.

� Cathode Stripping Machine:

� Cathode In-feed Conveyor� Cathode Washing System� Cathode Transfer System� Semi or Automatic Stripping

Station� Copper Sheet Stacking Station� Blank Out-Feed Conveyor� Hydraulics Equipment and

Electrical Controls

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Solvent Extraction Plants

� Modular � Pilot to Commercial� Transportable� Relocatable� Complete Plant� Standard Design� Flexible to tolerate

changes in flow and PLS concentration

� Friendly Operation

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Areas of Innovations

New or Improved Technologies

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Acid Mist Capturing

� Acid Mist Capture atSource

� Contaminants Recoveryat Wash Chamber

� Full Compliance ofregulations, particualrlyat Altitude and Sub-Zero applications

� Fully Integrated withmechanical handling

� Friendly to Operators

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Bags and Electrodes Frames� Acid Mist Encapsulation� Excelent Chemical and Thermal

Resistance. � Excelent Mechanical Wear

Resistance.� Easy Cathode Insertion and

Removal.� Uniform Cathode Quality� Premium Materials� In-house Material Testing

Facilities� Flexibility� Longer Life.

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Superior Starting Sheets

� Eliminates use of stripper cells

� Reduced Cathode Harvesting Cyclecompared to Blanks with LessManipulation

� Faster Productivity in CathodeWashing

� Virtual “Cu Blanks”. Stainless Steel orTitanium blanks eliminated

� Potential Pitting in SS Blanks and “Frequent Rebuffing” of cathode surface eliminated.

� Edge Strips not required

� Sheets exceed dimensional qualityrespect of SS Blanks when hanging.

� Best for Tankhouse Upgrading

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EXMAJET - Descriptive

� High Current DensityElectrowinning (> 550 A/m2)

� Increased Productivity� Improved Cathode

Quality� No External Air Needed� Improved

Hydrodynamics� Control of Bubble Size

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Portable Lix/Sx/Ew Plants

� Standard Design� Modular� Transportable� Relocatable� Flexible Capacities� Simple

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Teamwork for our customers:

www.exma.clwww.limpact.comwww.conalloy.com

www.neeltran.comwww.gcorner.co.ukwww.metalex.cl

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www.metalex.cl

Hernando de Aguirre 162 Oficina 806Santiago – CHILE

Tel: +56(2) 335 2217Fax: +56 (2) 321 8280

Mobile: +569 94371714Contact: Alex R. Lillo

Email: alillo@metalex.cl