C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/14, 53/225
C22B 1/02 (2006.01) C22B 1/24 (2006.01) C22B 11/00 (2006.01) C22B 11/08 (2006.01)
Patent
CA 2004475
METAL RECOVERY ABSTRACT A process for recovering gold and silver from refractory ores containing precious metals locked in sulfide and arsenide minerals including roasting a concentrate of said sulfide and arsenide minerals with lime at a temperature of about 600°C. Thereafter the resultant calcine is ground, leached with cyanide and precious metals are recovered from the cyanide solution.
Inco Limited
Smart & Biggar
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