Recovery of gold from refractory auriferous iron- containing...

Details Recovery of gold from refractory auriferous iron- containing... Recovery of gold from refractory auriferous iron- containing...

C - Chemistry, Metallurgy

22

B

53/229

C22B 11/08 (2006.01)

Patent

CA 1234290

ABSTRACT OF THE DISCLOSURE A process for the recovery of gold from refractory auriferous iron-containing sulphidic material which comprises providing an aqueous feed slurry of fresh feed material and oxidized solids from a subsequent pressure oxidation step. The feed slurry has a pulp density in the range of from about 30 to about 60% by weight. The slurry is subjected to pres- sure oxidation at a temperature of from about 120 to about 250°C under a total pressure of from about 360 to about 6000 kPa to produce a slurry of oxidized solids. A portion of the oxidized solids is recycled to the feed slurry, and gold is recovered from the remaining oxidized solids.

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