Mineral Processing Hydrometallurgy

Jaakko Leppinen

Outotec Oyj CMD 2008 Seville, Spain2

Mineral Processing - Hydrometallurgy

BIO

CRUSHING GRINDING FLOTATION

HEAP LEACHINGOF ORE

ORE

SOLUTION PURIFICATION

METAL

CONCENTRATE

FLOTATIONTAILINGS

REDUCTION

LEACH RESIDUE

ORELEACHING

CONCENTRATE LEACHING

Outotec Oyj CMD 2008 Seville, Spain3

Mineral Processing - Hydrometallurgy

CRUSHING GRINDING FLOTATION

HEAP LEACHINGOF ORE

ORE

SOLUTION PURIFICATION

METAL

CONCENTRATE

FLOTATIONTAILINGS

REDUCTION

LEACH RESIDUE

ORELEACHING

CONCENTRATE LEACHING

ENVIRONMENTAL ISSUES

ENERGY CONSUMPTION WATER CONSUMPTION CHEMICALS CONSUMPTION

TAILINGS MANAGEMENT- SOLID RESIDUES

- WATER RECYCLING

- CHEMICALS

Outotec Oyj CMD 2008 Seville, Spain4

Energy-efficient grinding technology Efficiency in the grinding circuit

improves the overall performance of the concentrator.

Outotec provides Advanced Control Tools (ACT) for grinding circuits: Desired particle size distribution is

achieved and maintained. Throughput of the mill is optimized.

Outotec Skimmair flotation technology with grinding circuit

This ensures cost-effective, trouble-free and efficient operation of grinding circuit.

Outotec Oyj CMD 2008 Seville, Spain5

Advanced Flotation technology Outotec sets new standards for

Superior flotation performance: aeration, mixing and froth removing.

Low operating and maintenance costs and high equipment reliability.

The wide range of available cell sizes, including the world largest operating flotation cell (TC- 300) permits plant design to be compact, economical and efficient.

Outotec Oyj CMD 2008 Seville, Spain6

PRINCIPLE OF FLOTATION

CONCENTRATE

AIR

VALUABLE MINERALGANGUE MINERAL

OREFROM GRINDING

REAGENTS CONTROL OF CONDITIONS

FROTH WITH MINERALS

CONDITIONING STAGE FLOTATION STAGE

TAILING

Outotec Oyj CMD 2008 Seville, Spain7

Leading Thickener Technology The revolutionary SUPAFLO High Rate Thickener concept has pioneered and redefined the methods of clarification and thickening around the world over the past decade.

Outotec Oyj CMD 2008 Seville, Spain8

PRINCIPLE OF THICKENING

1 2

THICKENED UNDERFLOWTO TAILINGS

SOLUTIONTO RECYCLEOR DOWNSTREAMPROCESS

SLURRY (SOLIDS + SOLUTION)

Outotec Oyj CMD 2008 Seville, Spain9

PRINCIPLE OF PASTE THICKENING

ORDINARY THICKENER PASTE THICKENER

PASTE

THICKENED SLURRY

Outotec Oyj CMD 2008 Seville, Spain10

Paste thickening Outotec leads the industry with thickening

technologies for base metals and minerals slurries, using: High rate, High Compression, Paste Thickeners.

Why use Paste Thickeners? To efficiently use water (water shortage in

mine-sites). Underflow (paste/solids) does not require

filtration. De-watering a slurry to a paste will lead to

environmentally sustainable tailings management.

Paste might be used for refilling degraded mine-areas (rehabilitation of mine-sites).

Outotec Oyj CMD 2008 Seville, Spain11

Outotec hydrometallurgical processes

Standard HydroCopper Zn hydrometallurgy (direct

zinc concentrate leach technology)

SX technology

Customer specific tailored Different unit processes

(known performance) Equipment selection

Outotec Oyj CMD 2008 Seville, Spain12

The HydroCopper - process

HydroCopper is a chloride medium based leaching process:

Copper concentrates. Secondary copper raw materials.

Operating at atmospheric pressure and T = 80 -100C.

Final product copper wire rod. No concentrate transportation!!

Outotec Oyj CMD 2008 Seville, Spain13

Customized process solution What is a customized process

solution? Utilization of existing knowledge

and references. Adaptation of the knowledge for

a customer specific case.

Customized process to treat customer specific raw material Leaching Impurity control Residue control Product control.

Environmental aspects takeninto account.

Outotec Oyj CMD 2008 Seville, Spain14

Mine to metal concept

MINE CONCENTRATOR HydroCopper END PRODUCT

No concentrate transportation. Local sosio-economic impacts.

Outotec Oyj CMD 2008 Seville, Spain15

Mine to Metal Longer lifetime for mine

Outotec Oyj CMD 2008 Seville, Spain16

Summary Our customers want to produce metals competitively. Only those producers survive in the long run who use

sustainable technologies. Profitability and environmentally sound technologies

can and must go hand in hand. Technology development is the key. It is important to evaluate the whole production chain,

from ore to metal.

Outotec Oyj CMD 2008 Seville, Spain17

More out of ore!

Mineral Processing HydrometallurgyJaakko LeppinenMineral Processing - HydrometallurgyMineral Processing - HydrometallurgyEnergy-efficient grinding technologyAdvanced Flotation technologyPRINCIPLE OF FLOTATIONLeading Thickener TechnologyPRINCIPLE OF THICKENINGPRINCIPLE OF PASTE THICKENINGPaste thickeningOutotec hydrometallurgical processesThe HydroCopper - processCustomized process solutionMine to metal conceptMine to Metal Longer lifetime for mineSummary