Process for the sulfatization of non-ferrous metal sulfides

Details Process for the sulfatization of non-ferrous metal sulfides Process for the sulfatization of non-ferrous metal sulfides

1983-11-21

1985-09-17

Doll, John

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 45, 423106, 423109, 423146, 423150, 75 72, 75 82, 75 87, 75101R, 75115, C01G 5310, C01G 5110, C01G 310, C01G 906

Patent

active

045419930

ABSTRACT:
In the extraction of certain non-ferrous metals from their sulfide ores by a process where these sulfides are converted to water soluble sulfates by roasting, alkali metal carbonate or bicarbonate, especially sodium carbonate, is added to the roaster feed to promote the sulfatization reaction. Ores containing copper, nickel, cobalt or zinc sulfides are concentrated by froth flotation, the concentrate mixed with carbonate or bicarbonate and roasted. The roasted product is mixed with water to separate these metals as soluble sulfates from iron compounds and other solid residue. The sulfate solution is filtered from the solids and the non ferrous metals recovered by precipitation or electrolysis.

REFERENCES:
patent: 1289072 (1918-12-01), Annable
patent: 2187750 (1940-01-01), Marvin
patent: 4110106 (1978-08-01), Frankiewicz

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