Recovery of gold from refractory auriferous iron-containing sulphidic material
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United States of America Patent
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Aug 12, 1986
Grant Date -
N/A
app pub date -
Mar 4, 1985
filing date -
Sep 27, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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 pressure oxidation at a temperature of from about 120.degree. to about 250.degree. 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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