Recovery of metal values from ores

Details Recovery of metal values from ores Recovery of metal values from ores

1989-06-07

1990-05-29

Stoll, Robert L.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

75722, 423 24, 423 29, C22B 1104

Patent

active

049292749

ABSTRACT:
Heap leaching of gold/silver ores with an aqueous alkali cyanide solution containing a surfactant hydrolyzable at the pH of the solution, the surfactant being present in an amount sufficient to increase the rate of metal value recovery without adversely affecting the carbon efficiency in the subsequent step of separating the metal cyanide value from the pregnant leach solution by absorption on carbon columns.

REFERENCES:
patent: 1519396 (1924-12-01), Darrow
patent: 1549856 (1925-08-01), Darrow
patent: 2234140 (1941-03-01), Falconer
patent: 4721526 (1988-01-01), Elmore
McClelland, Gene E., et al., "Silver and Gold Recovery from Low-Grade Resources" Mining Congress Journal, 1981, pp. 17-23.
CA92(16):132551q.
"Gold and Silver Heap and Dump Leaching Practice", Soc. Mining Eng., Proc. Fall 1983 SME Meeting, pp. 41-49 Pilot Scale Heap Leaching at the Pinson Mine, Humboldt County, Nev., Mark E. Smith and W. B. Craft.

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