Chloride assisted hydrometallurgical extraction of metals

Details Chloride assisted hydrometallurgical extraction of metals Chloride assisted hydrometallurgical extraction of metals

C - Chemistry, Metallurgy

22

B

C22B 3/06 (2006.01) C22B 3/08 (2006.01) C22B 3/20 (2006.01) C22B 15/00 (2006.01) C22B 19/20 (2006.01) C22B 23/00 (2006.01)

Patent

CA 2387633

A process for the extraction of a base metal such as Ni, Co or Zn, from a sulphide ore or concentrate containing copper and the base metal comprises the step of subjecting the ore or concentrate to pressure oxidation in the presence of oxygen and an acidic solution containing halide and sulphide irons to produce a product solution containing copper and the base metal. The product solution is subjected to a copper extraction process for recovering copper from the solution and the product solution containing the base metal after copper recovery is recirculated or recycled to the pressure oxidation to effect build-up of the base metal in the product solution. Preferably, a stream which is split from the product solution is treated for the recovery of the base metal.

Divulgation d'un procédé pour l'extraction d'un métal de base, comme Ni, Co ou Zn, d'un minerai ou d'un concentré sulfuré contenant du cuivre et le métal de base. Ce procédé comprend une étape de soumission du minerai ou du concentré à une oxydation sous pression en présence d'oxygène et d'une solution acide contenant des halogénures ou des sulfures de fer afin de produire une solution contenant le cuivre et le métal de base. La solution produite est soumise à un processus d'extraction du cuivre afin de récupérer le cuivre de la solution et la solution restante contenant le métal de base est remise en circulation ou recyclée vers le circuit d'oxydation sous pression pour concentrer le métal de base dans la solution produite. De préférence, un circuit dérivé de la solution produite est traité afin de récupérer le métal de base.

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