High slurry density sulfidic mineral leaching using nitrogen dio

Details High slurry density sulfidic mineral leaching using nitrogen dio High slurry density sulfidic mineral leaching using nitrogen dio

1977-11-30

1979-03-13

Hearn, Brian

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 36, 423 53, 423109, 423150, C01G 310, C01G 906, C01G 5310

Patent

active

041443101

ABSTRACT:
An energy efficient process is disclosed for the hydrometallurgical oxidation of sulfidic minerals containing copper, silver, nickel, cobalt, molybdenum, or zinc values. A high density slurry, e.g., 67% by weight solids, is prepared from a particulate sulfide mineral and water. Nitrogen dioxide and preferably also oxygen are added to the slurry to oxidize the sulfidic minerals and to produce solubilized cations and nitric oxide. The nitric oxide is oxidized to nitrogen dioxide, thereby regenerating the principal oxidant. If oxygen is added to the slurry along with NO.sub.2, then the regeneration occurs in-situ.

REFERENCES:
patent: 2871116 (1959-01-01), Clark
patent: 3793429 (1974-02-01), Queneau et al.
Habashi, F., Extractive Metallurgy, vol. 2, Gordon & Breach, N.Y. (1970), pp. 15-19.

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