Hydrometallurgical arsenopyrite process

Details Hydrometallurgical arsenopyrite process Hydrometallurgical arsenopyrite process

C - Chemistry, Metallurgy

22

B

53/224

C22B 11/08 (2006.01) C22B 11/06 (2006.01)

Patent

CA 1219132

HYDROMETALLURGICAL ARSENOPYRITE PROCESS ABSTRACT A process for the hydrometallurgical recovery of gold from arsenical pyrite concentrate. The process comprises decomposing the concentrate by using a leach composed of higher valence nitrogen oxides present in acidic solution; subjecting the decomposed product to a solid-liquid separation to produce a residue and a liquid fraction; recovering gold from the residue by conventional means; and precipitating dissolved arsenic, iron and sulphur from the liquid fraction before recycling the liquid fraction in the process.

443728

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