Method for the recovery of base metals from ores

Details Method for the recovery of base metals from ores Method for the recovery of base metals from ores

C - Chemistry, Metallurgy

22

B

C22B 3/06 (2006.01) C22B 3/08 (2006.01) C22B 3/10 (2006.01) C22B 23/00 (2006.01)

Patent

CA 2727556

A hydrometallurgical method for leaching a base metal in a combined pressure acid leach comprises the steps of combining a sulphide ore (14) or concentrate with a laterite or other oxide ore (16) and mixing them together to form a slurry in a milling circuit (12). The combined slurry is leached in a pressure acid leach circuit (20) comprising a series of pressure Pachuca (tanks 22). An oxidant such as oxygen or air is provided to the pressure acid leach circuit such that the oxidant allows for the conversion of substantially all of the sulphide to transition through to sulphate.

Linvention concerne un procédé hydrométallurgique pour lixivier un métal de base lors dune lixiviation acide sous pression combinée. Le procédé selon linvention comprend les étapes de combinaison dun minerai sulfuré (14) ou dun concentré avec une latérite ou un autre minerai oxydé (16) et de mélange de ces éléments pour former une pâte dans un circuit de broyage (12). La pâte combinée est lixiviée dans un circuit de lixiviation acide sous pression (20) qui comprend une série de cuves Pachuca sous pression (cuves 22). Un oxydant tel que loxygène ou lair est introduit dans le circuit de lixiviation acide sous pression de manière à ce que loxydant permette la conversion de sensiblement la totalité du sulfure en un produit de transition, puis en sulfate.

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