Hydrometallurgical process for copper recovery

Details Hydrometallurgical process for copper recovery Hydrometallurgical process for copper recovery

1985-07-30

1987-01-06

Doll, John

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75 2, 75 97A, 75114, 75118R, 75121, 423 38, 423 53, 423567A, 204107, C22B 1500

Patent

active

046344675

ABSTRACT:
An improved hydrometallurgical process for the recovery of metallic copper, elemental sulfur, compounds of molybdenum and other valuable materials from copper sulfide ore concentrates, such as chalcopyrite. The process, comprising a reduction stage, metallic copper recovery stage, and a combined regeneration-purge-oxidation stage, is improved by the addition of a second reduction stage following the first or primary reduction stage, and by the addition of a by-product recovery stage after the second or secondary reduction stage. The secondary reduction stage also enhances overall process performance by allowing more flexible operating practices.

REFERENCES:
patent: 3879272 (1975-04-01), Atwood et al.
patent: 3901776 (1975-08-01), Kruesi et al.
patent: 4138248 (1979-02-01), Narain
patent: 4236918 (1980-12-01), Narain
patent: 4337128 (1982-05-01), Haakonsen et al.
patent: 4384890 (1983-05-01), Clevenger et al.
patent: 4544460 (1985-10-01), Ochs

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