Consecutive or simultaneous leaching of nickel and cobalt...

Details Consecutive or simultaneous leaching of nickel and cobalt... Consecutive or simultaneous leaching of nickel and cobalt...

2011-01-18

2011-01-18

Bos, Steven (Department: 1793)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

C423S150500, C423S139000, C423S140000, C423S141000, C423S142000, C423S143000, C423S144000, C423S145000, C423S146000, C423S147000, C423S164000

Reexamination Certificate

active

07871584

ABSTRACT:
A process for the recovery of nickel and cobalt from nickel and cobalt containing ores, including the steps of first leaching a laterite ore and/or a partially oxidized sulfide ore with an acid solution to produce a pregnant leach solution containing at least dissolved nickel, cobalt and ferric ions, and subsequently leaching a sulfide ore or concentrate with the pregnant leach solution to produce a product liquor. Alternatively, the laterite ore and/or partially oxidized sulfide ore can be leached in a combined leach with the sulfide ore or concentrate. The ferric ion content in the pregnant leach solution or in the combined leach is sufficient to maintain the oxidation and reduction potential in the sulfide leach high enough to assist in leaching nickel from the sulfide ore or concentrate.

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