Precious metals recovery process

Details Precious metals recovery process Precious metals recovery process

1992-02-10

1993-04-27

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75428, C22B 1100

Patent

active

052058581

ABSTRACT:
Standard cyanide-extraction techniques are coupled with carbon adsorption to facilitate the recovery of precious metals. The carbon is in the minus eighty mesh size range and is removed from a slurry by flotation. The loaded carbon is then dried and destroyed by direct fusion to produce dore bullion.

REFERENCES:
patent: 2147009 (1939-02-01), Chapman
Ammen Recovery and Refining of Precious Metals TN760A5 Dec. 1985 pp. 10 to 16, 24 and 25.

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