Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1976-09-07
1977-07-19
Vertiz, O. R.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75117, 423 24, 423 32, C22B 1510
Patent
active
040366391
ABSTRACT:
Substantially pure copper is produced from impure cupriferous materials by leaching the cupriferous material with an ammonium sulfate-containing ammoniacal solution in the presence of oxygen, followed by separating the copper-containing aqueous liquor from the insoluble leach residue and contacting the thus separated leach liquor with an organic extractant of the metal ion exchange type to extract the copper from the leach liquor. The organic phase comprising the copper-bearing organic extractant is separated from the aqueous phase comprising the leach liquor of reduced copper content, and the resulting copper-bearing organic extractant is contacted with an aqueous solution of sulfuric acid to strip the copper from the copper-bearing extractant. The copper containing acidic solution containing from 5 to 150 gms/l of dissolved copper is then separated from the solution of reconstituted organic extractant, and the desired high purity copper is recovered from this solution by electrowinning or other techniques such as direct hydrogen reduction.
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Solvent Extraction, Proceedings of the I.S.E.C., vol. II (1971), Society of Chemical Industry, London, pp. 1351-1355.
Ritcey et al., The Canadian Mining and Metallurgical Bulletin, (May 1972), pp. 46-50.
Boldt, The Winning of Nickel, Longmans Canada Ltd., Toronto, (1967), pp. 299-310.
Delbridge Robert F.
Fors Arne I.
Hearn Brian E.
Piper Frank I.
Sherritt Gordon Mines Limited
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