Reductive ammoniacal leaching of nickel and coblat bearing
AssigneeBHP Billiton SSM Technology Pty. Ltd.
InventorsPeter Anderson, Mark Fisher, John Fittock, Victoria Hultgren, Erin Jones, Robert Messenger, Adam Moroney
Life of this patent
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Abstract
A process for the recovery of nickel and/or cobalt from an impure nickel, cobalt or mixed nickel/cobalt material including the steps of: a) providing a nickel, cobalt or mixed nickel/cobalt material; and b) contacting the nickel, cobalt or mixed nickel/cobalt material with a feed ammoniacal ammonium carbonate solution and a reductant in a leach step.
Claims31
A process for the recovery of nickel and/or cobalt from an impure nickel, cobalt or mixed nickel/cobalt material including the steps of:
- a) providing a nickel, cobalt or mixed nickel/cobalt material;
- and
- b) contacting the nickel, cobalt or mixed nickel/cobalt material with a feed ammoniacal ammonium carbonate solution and a reductant in a leach step.
A process for the recovery of nickel and/or cobalt from a nickel, cobalt or mixed nickel/cobalt material including the steps of:
- a) providing a nickel, cobalt or mixed nickel/cobalt material;
- b) contacting the nickel, cobalt or mixed nickel/cobalt material with a feed ammoniacal ammonium carbonate solution in a primary leach step to produce a product solution containing the majority of the nickel and cobalt and a residue;
- c) separating the residue from the product solution;
- and
- d) contacting the residue with fresh ammoniacal ammonium carbonate solution and a reductant in a secondary leach step to produce a secondary product solution containing the dissolved nickel and cobalt and a secondary leach residue.
-32. (canceled)
Dependencies are inferred from the claim text.