Metals recovery

Details Metals recovery Metals recovery

1983-11-04

1984-06-05

Andrews, R. L.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210758, 210911, 210912, 75101R, 75115, 75117, 75119, 75120, 75101BE, 423138, 423150, 423 87, C25C 108

Patent

active

044527063

ABSTRACT:
Various metals including cobalt nickel and copper can be recovered from a roasted ground ore or waste and particularly from tailings of a pyritic gold ore by leaching with sulphuric acid, oxidizing the separated leach liquor, filtering and partially neutralizing the liquor. In an improved process, the oxidation is effected with peroxomonosulphuric acid and the neutralization with a 60:40 to 40:60 mixture of calcium and sodium hydroxide/oxide. By so doing, it is possible to minimize the number of process stages by elimination of either or both solid/liquid separations and to combine the leach and oxidation stage, or to improve the separation of metals from impurities.

REFERENCES:
patent: 4201667 (1980-05-01), Liao
patent: 4244734 (1981-01-01), Reynolds et al.

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