Mineral Process

8/10/2019 Mineral Process

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Advanced Engineering, Worldwide Facilities &Comprehensive Technical Support


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EIMCO Process Equipment Company

is an organization whose history and

development are inextricably linked

with the evolution of twentieth century

mining and minerals processing. Since

the early 1900s, EIMCO has pioneered

the development and deployment of

new process technology and equipment,

producing products that have helped the

mining industry steadily reduce its cost

of production while maximizing

recovery efficiency.

Today, EIMCO supports the extractiveindustries with an unmatched combina-

tion of advanced engineering, world-

wide manufacturing facilities and com-

prehensive technical support services.

Advanced Engineering -EIMCO

blends the latest CAD/CAM

technologies with an intimate

understanding of process flowsheets

and mill environments, producing

mechanical systems that are productive,

reliable and economical.

Worldwide Manufacturing -

Manufacturing facilities are located

in North and South America, Europe,

Africa, and Australia.

Technical Support -Expert technical

support specialists are available world-

wide for process consultation, flow

sheet development, mechanism sizing,

troubleshooting and new installation

start-up assistance.

Tankage and Erection Service -

In many parts of the world, complete

erection and construction management

services are available for containment

tanks and basins used with EIMCO

sedimentation equipment.

Sedimentation Equipment

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EIMCOThickener DrivesEIMCOthickener drives are the most

durable and reliable units in the world.

Great care in material selection and

strict adherence to AGMA design

guidelines result in longer gear life,

higher usable torque and maximum

peak torque capacity.

EIMCOThickener Drives Feature:

Worm and multi-stage spur gear

designs with planetary intermediate

reducersSeparate, precision four-point

contact main bearings support the

main gear and protect against

severe radial, overturning and

vertical loads

Steel main spur gears are

hardened prior to machining

All gears and bearings are oilbath

lubricated

Accurate torque control for reliable

overload protection

Rake arm lift mechanisms availablefor all center driven thickeners

All pinion shafts are fully supported

to ensure accurate alignment

Standard torque capacities from

3,000 - 8,000,000 Nm

(2,000-6,000,000 ft./lbs.) with

special designs available to

13,500,000 Nm (10,000,000 ft/lbs.).

EIMCOThickenersEIMCO is the worlds leading manufac-

turer of minerals-duty thickeners in ap-

plications such as concentrate, tailings,

preleach and CCD. With over a half

centurys experience and thousands of

installations, EIMCO Process engineers

can assist in sizing and mechanism

selection for maximum economy and

performance.

Thickener Types:

Bridge supported mechanism- for

basins to 53m (174 ft.) in diameter

Column supported mechanism-

for basins to 183m. (600 ft.) in

diameter. Includes conventional

center pier support as well as

caisson design with underflow

pumps located within the caisson.

Center drive and peripheral traction

drive designs are available.

SwingLiftTM(cable drive)-

for thixotropic slurries. Available to

90m (300 ft.) diameter.

Hi-RateTMThickener-

Enhanced flocculation accelerates set-

tling. Higher flow and loading rates

reduce space requirements. Available

up to 125m. (420 ft.) diameter.

Metallurgical Reactor-Clarifier -

designed for high-efficiency clarifi-

cation of feed streams using me-

chanical flocculation in the feedwell.

Rakeless (E-CATTM)-clarifier-

thickeners combine excellent

clarification and high underflow

slurry density in a small footprint.Delta-Stak-Inclined Plate

Clarifiers give large clarification

area in a compact, low

maintenance tank.

Deep ConeTMPaste Thickener

patented system to maximize

solids concentration for economic

disposal and liquor recovery.

High Density Paste Thickenerfor

high tonnage applications produc-

ing high solids concentration.


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E-CATClarifier-ThickenerThe EIMCOE-CATTMClarifier-

Thickener streamlines liquid-solid

separation flowsheets by combining

optimized flocculation, high-rate clari-

fication and high-density thickening in

a single compact unit with no moving

parts. The E-CATTMClarifiers deep

tank and steep compaction cone con-

centrate settled solids, while annular

rows of clarifying cylinders aggregate

and remove fine suspended solids from

the overflow liquor. An internal cone/pipe system rapidly channels free water

to the feedwell for influent dilution.

Sizesfrom 2m diameter x 7.7m height

to 12m diameter x 16m height.

EIMCO

Deep Cone

andHigh-Density Paste ThickenersEIMCODeep ConeTMand High-Density

Paste Thickeners optimize flocculation

and enhance settled solids compression

for maximum underflow slurry solids

and minimum thickener footprint. Deep

ConeTMunits accommodate up to 20

times the solid mass flow and 10 times

the volumetric loading of conventional

thickeners. Their deep tank design

maximizes pulp concentration, and

produces uniform, non-segregating,

paste consistency underflow slurry.

Deep ConeTMPaste Thickening

Applications:

Coarse or fine tails

CCD circuits - superior washing

Base metals

Phosphate slimes

Diamond slimes

Uranium tails

Surface stacking and water recovery

E-DUCFeed Dilution SystemE-DUC

feed dilution systems boost

settling rates and dramatically reduce

polymer consumption by diluting

thickener feed slurry with clarified

supernatant. No pumps are required for

diluting liquor circulation and influentenergy is utilized for polymer mixing,

eliminating all moving parts. The

improved settling efficiency reduces

overflow liquor solids, increases

underflow slurry density, and reduces

polymer consumption by up to 60

percent. Retrofits available for most

conventional thickeners.

High Rate Thickeners

High Performance Sedimentation Equipment

E-CATTM

C larifier Design Features Operating Advantages

No moving parts Lower capital cost

Lower energy consumption

Reduced maintenance

Smaller surface area than Reduced capital and installation

conventional thickeners expense

Self-diluting feedwell Optimal flocculant utilization

No external flocculant dilution pumps

Excellent overflow clarity Effluent re-use

Lower ponding area requirements

Dense underflow Reduced filtration equip. downstream

Reduced handling volume

Increased CCD efficiency

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The SmartCellflotation machine

combines the proven WEMCO flotation

mechanism with cylindrical cells to

optimize energy input, aeration, and

mixing. This configuration reduces

pulp turbulence and improves froth

stability.Additional standard features

include a hybrid draft tube, beveled

cell bottom, froth crowder, mixing

baffles, and radial launders.

Since the introduction of the SmartCell

Flotation Machine in early 1996, most

major base metal flotation developmentshave selected WEMCOSmartCell

machines.

Cylindrical Tank Design

Improves mixing efficiency and

air dispersion

Better surface stability and less

pulp turbulence

Lower capital costs

Hybrid Draft Tube & Beveled Tank

Improves hydrodynamic mixing

Increases solids suspension

Improves coarse particle recovery

Radial Launder & Mixing Baffles

Increases froth mobility

Decreases froth residence time

Increases recovery

WEMCO

SmartCell

Flotation Machines

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Semi-

CircularFeed Box

DisperserHood

Disperser

Tank Bevels

Hybrid DraftTube

FalseBottom

Motor

AgitatorMechanism

FrothCrowder

RadialLaunder

MixingBaffle

SingleConcentrateLaunder

Rotor

Feed

Tails

Ambient Air


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PyramidFlotation ColumnsPyramidTMflotation columns deliver high

recoveries and grades, reduce reagent

consumption, decrease maintenancecosts and lower capital expense. The

keys to success are as follows:

Design:First and foremost, the appropri-

ate number, size and layouts of flotation

columns is accomplished by applying

the critical design parameters and work-

ing with our customers to optimize the

layout of the system. EIMCOs high

level of experience can guide our cus-

tomers through this step.

KnowledgeScapeprocess control soft-

ware allows engineers to maximize the

economic gain of virtually any process-

ing or manufacturing operation.

KnowledgeScapesoftware is the first

real-time optimization system that actu-

ally learns process dynamics and adjusts

process setpoints to achieve a true opti-

mal operating regime. This is the first

expert system operating shell ever tocohesively integrate several different

artificial technologies in a common

wrapper. The KnowledgeScapesoft-

ware has met with huge successes as a

result of the unique synergy created by

combining such tools as fuzzy logic,

neural networks and genetic algorithms.

Installations worldwide have experi-

enced large productivity increases and

almost immediate return on investment.

The KnowledgeScapesoftware is avail-

able as a retrofit system for controlling

individual unit operations or for plant-

wide optimization. All EIMCO equip-

ment can be provided with embedded

KnowledgeScape intelligence for opti-

mized control.

KnowledgeScape

Control Software

Process Control

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Sparger Selection:For the heart of

the column, EIMCO Process offers the

RateMaxsupersonic sparger system

which is designed for maximum

operational flexibility and minimum

maintenance.

Operation:Proper feed conditioning and

selection of column flotation operatingparameters such as froth depth, aeration

rate and washwater flow rate can make

or break a column installation.

Benefits of PyramidTMColumns:

Improve hydrodynamic conditions

for improved flotation separation

Wear-resistant sparger nozzles

On-line sparger maintenance

No down time!

Reduced capital costs

PyramidColumns Sparger & DesignEIMCOs latest generation column

flotation sparger system, the RateMax

supersonic sparger system provides in-

credible opportunities to both improve

performance and increase operational

flexibility as well as decrease mainte-

nance requirements. The exit velocity of

the gas leaving a RateMaxnozzle is

about 50% greater than a standard col-

umn sparger nozzle, which translates

into smaller bubbles being formed. The

net result is that the bubble surface area

flux rate, Sb, is as much as 50% higher

than traditional sparger designs. Some

of the features and benefits of the

RateMaxsparger include a simple,ro-

bust design constructed of wear and

chemical resistant ceramics, easy on-line

maintenance of the system and the abil-

ity to easily retrofit any column installa-

tion. Combined with our ACDSM

(Auto-

mated Column Designer), engineering

and design services, EIMCO has a

potent combination of both technology

and tools to assist any user of column

flotation technology.

WEMCOAgitairFlotation CellsAgitairflotation cells offer fine process

control through low-pressure forced aer-

ation with individual valves controlling

air supply to each bank and cell. Mixing

and air diffusion are achieved through

the use of hollow-shaft impellers and

floor-mounted stabilizer. Several impel-

ler and stabilizer configurations are

available to accommodate various cell

and process requirements. Agitair

cells provide excellent performance

in cleaner circuits.

Cell Sizes:1 - 14m3(40 - 500 ft3)


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EIMCODrum FiltersEIMCOrotary vacuum filters provide

efficient, continuous filtration with the

flexibility to handle dewatering, cake

washing or clarification. Their ability

to accommodate maximum hydraulic

flows and a wide range of cycle times

allows optimum cake formation in many

different slurries.

EIMCODrum Filters Feature:

Rigid box and gusset drum

construction with unitized end plates

and machined annular internal

support rings to ensure structural

integrity and drum roundness.

Five available discharge

arrangements: scraper, roll,

EIMCOBELT, string or precoat.

Cast Hy-FlowTMfilter valve with

smooth internal contours and large

diameter ports for minimal

pressure drop.

Large diameter internal piping

for high flow volume, minimal

pressure drop.

Deep deck sections with poly-

propylene grid cloth supports.

Wide choice of materials including

mild steel, rubber-covered steel,

stainless steel, and exotic metals.

Drum Filter Sizes:

Drum diameter: 1 - 4m (3 - 13.5 ft.)

Drum length: 1 - 11m (3 - 36 ft.)

Filtration area: 1 - 140m2(9 - 1500 ft2)

EIMCOMETMolded

Thermoplastic Drum FiltersEIMCOMet TMfilters provide dependable

vacuum filtration in corrosive

applications such as those found in many

molybdenum and rare earth circuits -

at a substantially lower price than

filters constructed of exotic metals.

All components that contact corrosive

agents are molded thermoplastic or FRP.

EIMCOMetTM

Filter Sizes

Drum diameter: 1 - 3m (3 - 10 ft.)

Drum length: 0.3 - 4.2m (1 - 14 ft.)

Filtration area: 0.9 - 39m2(9.4 - 420 ft2)

EIMCOExtractor

Horizontal Belt FiltersEIMCO Extractorhorizontal belt

vacuum filters are versatile, high-

production machines that utilize both

gravity and vacuum forces for rapid

separation of liquids from coarse solids.

Multiple wash zones of adjustable

size can be arranged in co-current or

counter-current fashion, making the

EIMCOExtractorHBF filter an ideal

choice for cake washing applications.

Top feed and an extended cake drying

zone accommodate fast settling solids

and low cake moisture requirements.

EIMCO ExtractorFilters Feature:

Choice of drainage belt carcass and

elastomer materials to match process

demands. Support carcass is fully

encapsulated for protection from

process liquids.

Trapezoidal, flexible, or static belt

edge flanges available.

Air deck support and traveling wear

belt available in larger filter sizes.

Diamond design vacuum pan for

high hydraulic flow, low pressure

drop. Lowering system provides

easy access.

Filters

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EIMCOExtractor

Filter Sizes

and Capacities:

Filtration area: 1 - 150m2

(10 - 1600 ft2)

Processing Rates:50 - 2500 Kg/hr/m2

(10 - 500 lbs/hr/ft2)

Belt Speeds: Variable to 1 mps

(200 ft/min)

EIMCOAgidiscFiltersAgidiscTMfilters provide compact, low-

cost, high volume production where

large filtration areas are required. They

are particularly effective in filtering fast-

settling solids that do not require cake

washing. Ideal applications include iron

ore, coal cleaning and alumina hydrate.

AgidiscFilters Feature:

Heavy duty tank with external steel

frame. Rubber lining available

Hy-FlowTMfilter valve accommodates

maximum hydraulic and pneumatic

flows with minimum pressure drop

Durable molded plastic sectors

Agidisc

Filter Sizes:Number of discs: 1 to 15

Disc diameters: 1.2 - 3.8m

(4'0" - 12'6")

Filtration areas: 2 - 300m2

(22 - 3300 ft2)

AFP IVAutomated FilterThe AFP IVTMFilter design provides a

simple, rugged and reliable solution to

the special problems associated with

minerals processes. These filters not

only provide high throughput and

efficient solids capture, but they also

operate continuously, automatically,

in harsh environments, and can handle

abrasive or corrosive slurries. When

coupled with simple systems and

EIMCO operating philosophies,

operating costs are maintained at

the lowest levels in the industry.

EIMCOAFP IV

Filters Feature:

15 bar operating pressure

Hydra-ShiftTMPlate Shifter

PLC Control

Automatic lubrication

Automatic drip trays

Automatic shaker

Automatic flood washer

10-25 minute cycle times typical

Double-ended feed

Available up to 120 Chambers

Quick Open/Close Plate Options

1200, 1500, 2000 mm plates in

polypropylene or cast iron

Lower operating costs

Recessed plates standard

Membrane plates optional

Special materials

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EIMCOBelt Press FiltersEIMCOBelt Press Filters effectively

combine long gravity drainage and

wedge sections with decreasing diameter

compression rolls, each one wrappped

over a long arc to maximize retention

time under pressure. This results in

higher throughputs and lower cake

moistures. Fine coal or tailings can be

efficiently dewatered for dry stacking.

EIMCOfilters accommodate feed

material from 0.5 - 0mm (30 - 0 mesh)

in size.

Belt Press Sizes & Capacities:

Belt widths:1.0 - 2.6m (3 - 8.5 ft.)

Capacities: to 30 metric or 33 short

tons/hour

EIMCOVertical Leaf

Pressure FiltersThe EIMCOVPF is

an automatic, self-

sluicing pressure filter

developed specifically

for Bayer liquor

filtration in alumina

processing. It features

a top-opening standard

pressure vessel with

swing bolt flange and

O-ring seal, discharge

cone and vertically

mounted filter leaves.

Operation is fully

automatic with cake

discharge achieved by

sequential leaf sluicing

that minimizes liquor

consumption and

eliminates discharge

cone blockage.

EIMCOVertical Pressure Filters feature:

Quick release internal filtrate spigot

connections

Bottom leaf guides to prevent filter

cloth wear or damage

Three filtration areas in one standardvessel size: 375, 415, and 440m2

Filters

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Attrition MachinesWEMCOAttrition Machines provide

particle surface preparation, cleaning and

desliming to improve productivity of

Granular Media FiltersEIMCO manufactures pressure and

gravity feed granular media filters for

minerals applications such as pregnant

solution filtration in SX/EW circuits. All

filters use Flexscourunderdrains, which

have been designed for efficient media

utilization and uniform distribution

of simultaneous air scour and waterbackwashes for effective bed cleaning.

Flexscourlaterals are partitioned to

separate air and water flows, allowing

the underdrain to be cleaned in place by

internally circulating high temperature

wash water. All underdrain components

are manufactured of stainless steel

for a completely corrosion-resistant

installation.

Pressure vessels are fabricated to ASME

code VIII. Filter vessels are available in

full stainless steel construction. Gravity

feed filters are also available in FRPconstruction. EIMCOfilters are avail-

able in complete shop-fabricated, skid-

mounted modules with all required in-

strumentation and controls.

WEMCOPacesetter

Oil/Water SeparatorsThe WEMCO Pacesetteroil/water

separator has become the standard in

SX-EW applications for separating aque-

ous and organic streams. The Pacesetter

separator uses a unique, two-stage pro-

cess to effectively recover entrained

organic from either raffinate or electro-lyte or to remove entrained aqueous

from organic streams. First, influent

energy is diffused by a coalescer pack

causing small droplets to collide and

form larger ones. This is followed by a

separator pack that provides separate

surfaces and flow paths for aqueous

and organic streams thus preventing

re-entrainment. The packs are inclined

at 60 degrees to enhance solids removal.

The WEMCOPacesetteroil/water sep-

arator is designed to handle a wide vari-

ety of influent entrainment concentra-tions as well as upset conditions and

crud runs.

Pacesetteroil/water separators are engi-

neered in a range of sizes and can be

supplied in a variety of materials of

construction such as stainless steels or

FRP. Start-up and operation are simple

and reliable with little operator attention

and maintenance required.

Liquid and Liquid Separation

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Scrubbers / Classifiers

subsequent treatment processes such as

glass sand preparation and flotation.

Powerful attrition action is created by

particles abrading against each other in

a thick, high-density pulp as it moves

through a series of octagonal cells. Each

cell is equipped with a separate motor

driven impeller with three sets of

alternating pitch blades. The resulting

flow

reversals

provide

controlled

turbulence

for effective

attrition.

Cast alloy,

Ni-hard or

rubber

covered

paddles and

abrasion-resistant steel or rubber-covered

steel tank liners limit wear and

maintenance.

Cell sizes: 0.20 - 5.7m3(8 - 200ft3)

ClassifiersWEMCOSpiral Classifiers provide

continuous wet classification, washing,

dewatering or desliming. Fines and low-

density materials overflow the tank weir

while coarse, fast-settling particles are

removed and dewatered by the turning

spiral. Large diameter tubular shafts and

short, cast flight arms carry heavy loads

with minimal deflection. A simple lifting

device permits easy start-up after shut-

down or power interruption. Replaceable

wear shoes and tank liners simplifymaintenance and ensure long service life.

Specifications

Spiral diameters:300 - 2500 mm

(12 - 100 in.)

Tank lengths: 1.8 - 14.6m (6 - 48 ft.)

Wear materials: Ni-Hard, rubber,

urethane


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WEMCODense Media CyclonesWEMCOCyclones provide high-tonnage separation in a

compact footprint for smaller feed particle sizes in the

0.5 - 50mm range. Cast Ni-hard or high chrome steel

construction minimizes abrasive wear, and easily replace-

able sections reduce maintenance expense. An available

automatic density control system provides precise cut

control to (plus/minus) 0.01 SG units.

Sizes:350 - 700mm diameter

Treatment rates:to 250 tph

WEMCOHMS SystemsStandardized Mobil-Mill systems are available with

WEMCODrum, Cone or Cyclone separators. All systems

incorporate feed preparation, separation, product drainage,

washing and dewatering, media reclamation, storage and return.

All phases are semi-automated or controlled from a single

control panel. EIMCO water clarification and fines pressing

circuits are available to suit. Capacities: to 800 metric or

900 short tons/hour.

WEMCOHMS Drum SeparatorsWEMCOHMS Drum Separators perform gravimetric solid-

solid separations using a separating medium whose specific

gravity lies between those of the substances to be separated.

Sharp separations are achieved in the specific gravity range

of 1.25 - 3.8, at feed capacities of up to 820 metric or 900 short

tons per hour. WEMCODrum Separators are designed to

handle abrasive materials in the size range between 6 - 300 mm

(1/4" - 12"). Single and dual gravity machines are available,

designed for low maintenance and service lifetimes of 15

years or more.

Capacities:to 820 metric or 900 short tons/hour.

WEMCOHMS Cone SeparatorsWEMCOCone Separators handle separations where only

slight gravimetric differences exist between sink and float

product, and where retention time is critical. Ample area-volume

ratio permits sharp separations at high capacities, in feed particle

sizes from 1.5 - 75mm (10 mesh - 3").

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Heavy Media Separation


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11

EIMCO

Separation and Treatment Equipment

Granular Media Filtration Systems

FLEXSCOUR Stainless Steel Underdrain

POLYKLEENUnderdrain System

CASTKLEENUnderdrain System

Gravity & Pressure Filters

Low-Head Filters

Grit Removal Systems

Center-Raked Gravity Separators

Aerated Grit Chambers

Grit Washer-Classifiers

Pressure Filtration - Dewatering Systems

SHRIVERFilter Presses

EIMCOAFP IVAutomated Filters

EIMCOCLARI-DISCFilters

EIMCOVertical Leaf Pressure Filters

EIMCOBelt Press Filters

Process Control Systems

KNOWLEDGESCAPEAdaptive Optimizing Software

Thickeners

Center-Drive Circular ThickenersPeripheral Drive Circular Thickeners

Hi-RateDrive Thickeners

E-CAT Thickener-Clarifiers

EIMCODeep ConePaste Discharge Thickeners

EIMCOSwing Lift Thickeners

EIMCOThickener Drives

Vacuum Filtration Systems

EIMCORotary Drum Filters

EIMCOMETThermoplastic Drum Filters

EIMCOExtractor Horizontal Belt FiltersEIMCOTraveling Belt Filters

EIMCO AGIDISCFilters

Aeration Systems / Biological Processes

EIMCOLow-Speed Surface Aerators

Propulsair aerators

EIMCOCarrouselSystem

BARDENPHOProcess

Advent AIS System

Rotary Distributors

Anaerobic Digestion Systems

EIMCODigester Covers

EIMCOHydrosealDigester Covers

EIMIXMechanical Sludge Mixers

Clarifiers

EIMCOCenter-Raked Circular Clarifiers

EIMCOFlocculating Clarifiers

EIMCOSolids-Contact Clarifiers

E-CATClarifier-Thickeners

EIMCOClarifier Drives

TRAC-VACPneumatic Sludge Collectors

DELTA-STAKLaminar Flow Clarifiers

FLEXKLEARLaminar Flow Settlers

Classifiers

WEMCOSpiral Classifiers

Dense Media Separation Systems

WEMCODrum Separators

WEMCOCyclone Separators

WEMCOModular Separation Plants

Flocculation & Mixing Systems

EIMCOFlash Mixers

EIMCOVertical Turbine Mixers

EIMCOPaddle FlocculatorsFLOCSILLATOROscillating Mixers

Flotation Systems - Minerals Separation

WEMCO1+1Cells

WEMCOSmartCells

PYRAMIDFlotation Columns

WEMCOAgitaircells

WEMCOAttrition machines


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Global Sales, Service and Full Equipment Life-Cycle Support

Orillia

Salt Lake City

Pittsburgh

San Luis Potosi

Mexico City

Lima

Santiago

Sao PauloJohannesburg

RugbyWiesbaden

Milan

Madrid

Torcy

Hoofddorp

Beijing

Singapore

BelmontGosford

e-mail: [email protected] www.glv.com

For a complete listing of office locations, visit www.glv.com or contact our US office at 1.801.526.2000

Documents

Mineral Process