Gold extraction

Details Gold extraction Gold extraction

C - Chemistry, Metallurgy

22

B

53/224

C22B 11/00 (2006.01) C22B 11/02 (2006.01) C22B 11/08 (2006.01)

Patent

CA 1107076

ABSTRACT OF DISCLOSURE A process for extracting gold values from a gold-bearing pyrite concen-trate which includes the steps of roasting the concentrate at a temperature in the range 600 to 750°C, preferably 650 to 700°C, the roast also preferably being carried out in the presence of a suitable alkali metal salt or hydroxide, typically sodium sulphate, and there- after leaching the gold values from the roasted concentrates for example by means of a standard cyanide leach.

320821

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