C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/276, 53/299
C22B 15/02 (2006.01) C22B 5/10 (2006.01) C22B 15/00 (2006.01) C22B 23/02 (2006.01)
Patent
CA 1180902
ABSTRACT OF THE DISCLOSURE A carbonaceous reducing agent, at least one of calcium oxide and a substance capable of forming calcium oxide, and a sodium salt are admixed into a substance containing a sulfide of at least one of nickel, cobalt and copper. The resulting mixture is heated to at least 750°C directly by a non-reducing gas, such as the combustion product of heavy oil. A metal or metals are recovered in powder form by beneficial methods and acid washing from the roasted product.
391843
Kitagawa Masatoshi
Okajima Yasuhiro
Kirby Eades Gale Baker
Sumitomo Metal Mining Company Limited
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