Process for the recovery of zinc from a zinc sulphide ore or concentrate
AssigneeCominco Engineering Services Ltd.
InventorDavid L. Jones
Life of this patent
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Abstract
A processs for the recovery of zinc from a zinc sulphide ore or concentrate comprises the steps of subjecting the concentrate to pressure leaching with an acidic solution containing at least about 15 g/L iron in solution to produce a zinc solution and a solid leach residue containing iron. The zinc solution is subjected to zinc solvent extraction to produce a raffinate and a pregnant zinc solution. A method of removing ion from an iron bearing raffinate is also provided which comprises pressure leaching a zinc sulphide ore with the iron bearing raffinate to produce a solid leach residue containing iron and a zinc solution.
Claims11
A process for the recovery of zinc from a zinc sulphide ore or concentrate, comprising the steps of:
- subjecting the ore or concentrate to pressure leaching with an acidic leach solution containing at least about 15 g/L iron in solution to produce a zinc solution and a solid leach residue containing iron;
- subjecting the zinc solution to zinc solvent extraction to produce a raffinate and a pregnant zinc solution;
- and
- subjecting the pregnant zinc solution to electrowinning to recover zinc and producing a resultant spent electrolyte.
Dependencies are inferred from the claim text.