Method of recovering non-ferrous metals from sulphidic materials

Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium

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75 7, 75 60, 75116, 75117, 204108, C22B 1500

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active

040690415

ABSTRACT:
A method for recovering copper and/or other non-ferrous metals from sulphidic raw material by roasting the material to a substantially sulphur-free state and then in a separate furnace sulphatize the roasted material into a form of a readily soluble sulphate and/or basic sulphate and then leaching the sulphatized material with an aqueous sulphuric acid solution. Copper and/or other non-ferrous metals are recovered from the spent leaching solution. The leaching solution is after said recovering recirculated to the leaching stage and to the roasting stage.

REFERENCES:
patent: 839451 (1906-12-01), Blackmore et al.
patent: 1974886 (1934-09-01), Young
patent: 2783141 (1957-02-01), Foley
patent: 3971652 (1976-07-01), Bryson

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