BASF Mining Solutions Flyer Copper

7/27/2019 BASF Mining Solutions Flyer Copper

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CopperSolvent Extraction


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BASF LIX technology recovery o copperrom leach solutions

Leaching copper rom oxide ores, low grade secondary sulde

ores, and primary sulde concentrates with aqueous acid or

ammonia solutions, ollowed by solvent extraction (SX) has

been practiced commercially since the late 1960s. Over time,

LIX Reagents (hydroxyoximes chelating agents) used in

these solvent extraction processes have become more ecient,

more selective and more economical to use.

The benets and objectives o the copper solvent extraction

process are purication o copper, concentration o copper and

conversion o the copper to a orm that allows BASFs customers

to produce desired nal metal products including cathode,

powder and crystals.

BASF produces a complete line o copper solvent extraction

reagents, including ketoximes, aldoximes, non-modied blends

and modied blends o ketoximes and aldoximes. These re-agents and reagent blends allow BASF to supply its customers

with an optimized reagent ormulation tailored to meet the

needs o their specic applications.

The overall leaching, solvent extraction and nal metal produc-

tion processes can be summarized in the ollowing simplied

fowsheet.

LEACHING PROCESS / SOLVENT EXTRACTION /

FINAL COPPER RECOVERY

Copper leaching

Recyc

ledleachsolution

Copper extraction

Strippe

dLIXReagent

Copper stripping

Aqueo

usstripsolution

Pure copper product

C

oncentrated&purifedc

oppe

rsolutio

n

C

opperloadedLIXReage

ntImpuremetalleachs

olution

LEACHING PROCESS SOLVENT EXTRACTION FINAL COPPER RECOVERY


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Ketoximes: Moderately strong extractants and can be used

without equilibrium modiers.

Aldoximes: Very strong extractants and have to be used in

mixture with an equilibrium modier or ketoxime to aid the

stripping process and obtain adequate net copper transer.

LIX Reagents work on a hydrogen ion cycle. Acid is generated

in electrowinning, transerred to the organic in stripping in ex-

change or copper and then exchanged or copper in extraction.

Advantages o BASF LIX Reagents

Fast kinetics: Rapid copper uptake and copper stripping

Selective: Very high iron rejection

Net copper transer: Can be adjusted to maximize

process perormance

Ease o operations: Cleaner phase separation and

lower crud ormation

High purity fnal copper product: Lower entrainment

levels and lower transer o contaminants

Low viscosity: Operate better at high reagent

concentrations and low temperatures

Lower costs: Lower losses, higher net transer, improved

chemical stability

Service

All LIX Reagents are backed by BASFs comprehensive MSP

Minesite Services Program and BASFs qualied experts and

engineers.

Computer modeling

The BASF Isocalc computer simulation program provides

plant operators with ast and accurate simulations o virtually

any copper solvent extraction process involving suluric acid

leaching ollowed by copper solvent extraction with LIX

Reagents. The Isocalc program will generate extraction and

stripping isotherms and construct McCabe-Thiele diagrams or

a large number o circuit congurations. The program can also

be calibrated to match the perormance o commercial SX

plants, which allows the production engineer to accurately

determine the impact that changes in PLS chemistry, reagent

concentration, reagent blend and /or circuit conguration will

have on copper recovery.

Final Copper Cathode product bundled,

weighed and ready for shipment.

THE CHEMICAL STRUCTURES FOR

THE KETOXIME AND ALDOXIME REAGENTS

LIX OXIME EXTRACTANTS

COPPER EQUILIBRIUM REACTION

2 RH(org) + Cu+2SO4

2-(aq) R2Cu(org) + 2H

+1SO42-

(aq)

C

CH3

NOHOH

R

C

H

NOHOH

R

Ketoxime R = C9H25 Aldoxime R = C9H25 or C12H25


4/6

5.0

4.0

3.0

2.0

1.0 0.0 0.5 1.0 1.5 2.0 2.5

60

50

40

30

20 1.0 1.5 2.0 2.5 3.0 3.5

SX plant confgurations andfnal copper product

Commercial copper SX plants are designed around one o the

several proven circuit congurations: series, series parallel,

modied series parallel and optimum series parallel (or inter-

laced). The circuit conguration chosen will depend on several

variables unique to the site including economics, leach solutionchemistry and the operating philosophy o the company

associated with each plant. The solvent extraction process

can produce several dierent nal copper products, however,

most SX plants produce copper cathode.

Organicg/lcopper

Aqueous g / l copperRaff. = 0.22

Equilibrium extraction isotherm / two stage

McCabe-Thiele diagram with a typical LIX Reagent

Feed=2.5

0g/lCu

S. O.

L. O.

Aqueousg/lcopper

Organic g / l copper

Equilibrium strip isotherm /one strip stage

McCabe-Thiele diagram with a typical LIX Reagent

Loadedorganic=

3.9

0g/lCu

P. E.

S.O

.=1.7

7

S. E.


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The descriptions, designs, data and inormation contained herein are presented in good aith, and are based on BASFscurrent knowledge and experience. They are provided or guidance only, and do not constitute the agreed contractualquality o the product or a part o BASFs terms and conditions o sale. Because many actors may aect processing orapplication /use o the product, BASF recommends that the reader carry out its own investigations and tests to determinethe suitability o a product or its particular purpose prior to use. It is the responsibility o the recipient o product to ensurethat any proprietary rights and existing laws and legislation are observed. No warranties o any kind, either express orimplied, including, but not limited to, warranties o merchantability or tness or a particular purpose, are made regarding

products described or designs, data or inormation set orth herein, or that the products, descriptions, designs, data orinormation may be used without inringing the intellectual property rights o others. Any descriptions, designs, data andinormation given in this publication may change without prior inormation. The descriptions, designs, data, and inormationurnished by BASF hereunder are given gratis and BASF assumes no obligation or liability or the descriptions, designs,data or inormation given or results obtained, all such being given and accepted at the readers risk. (09/ 2013 )

= registered trademark o BASF SE

EVG1389e

Europe

BASF Perormance Products plc.

Cleckheaton Road

Low Moor, Bradord

BD12 0JZ

Great Britain

Phone: +44 1274 417 000

Fax: +44 1274 606 499

North America

BASF Corporation

2430 N. Huachuca DriveTucson, Arizona 85745

US

Phone: +1 520 622 8891

Fax: +1 520 624 0912

South America

BASF CHILE S.A.

Av. Carrascal N 3851

Quinta Normal

Santiago

Chile

Phone: +56 2 2640 7000Fax: +56 2 775 3095

Arica

BASF South Arica (Pty) Ltd.

852 Sixteenth Road

Midrand, P. O. Box 2801

Halway House 1685

South Arica

Phone: +27 11 203 2400

Fax: +27 11 203 2431

Australia

BASF Australia Ltd.

Level 12, 28 Freshwater PlaceVIC 3006, Southbank

Australia

Phone: +613 8855 6600

Fax: +613 8855 6511

For urther inormation:

[email protected]

BASF Mining Solutions Flyer Copper

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