Increasing the recoverability of gold from carbonaceous gold-bea

Details Increasing the recoverability of gold from carbonaceous gold-bea Increasing the recoverability of gold from carbonaceous gold-bea

1976-11-04

1977-07-26

Vertiz, O. R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 29, C01G 700

Patent

active

040383628

ABSTRACT:
The recoverability by cyanidation of the gold content of sedimentary gold-bearing ores containing organic carbonaceous material and gold-bearing pyrite, or other gold-bearing sulfides, is greatly increased by heating an aqueous slurry of the ore to about 167.degree. to 212.degree. F. and then introducing air or oxygen into the heated slurry to oxidize and eliminate a substantial portion of the carbonaceous material and oxidizable sulfides in the slurried ore, followed by cooling the slurry to about 70.degree. to 85.degree. F. and then introducing chlorine gas into the slurry to substantially complete the oxidation and chlorination of the carbonaceous content of the slurried ore. The ore is then subjected to conventional cyanidation to recover the gold content thereof.

REFERENCES:
patent: 1734306 (1929-11-01), Schraps
patent: 2777764 (1957-01-01), Hedley et al.
patent: 3574600 (1971-04-01), Scheiner et al.
patent: 3846124 (1974-11-01), Guay

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