Process for selective leaching of nickel- copper matte

Details Process for selective leaching of nickel- copper matte Process for selective leaching of nickel- copper matte

C - Chemistry, Metallurgy

22

B

53/289, 53/372

C22B 15/14 (2006.01) C01G 3/12 (2006.01) C01G 51/04 (2006.01) C01G 53/10 (2006.01) C22B 3/00 (2006.01) C22B 15/00 (2006.01) C25C 1/06 (2006.01)

Patent

CA 1145952

ABSTRACT OF THE DISCLOSURE A finely-ground nickel-copper matte is leached using an acid at a minimum temperature of approx. 80°C and under oxidizing conditions in order to produce a nickel sulfate solution and a nickel-copper sulfide residue, which is separated from the solution and thereafter the nickel-copper sulfide residue is leached using acid in an autoclave at a minimum temperature of 110°C and under oxidizing conditions in order to produce an additional quantity of nickel sulfate solution and a copper sulfide precipitate.

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