Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Patent
1974-02-27
1976-06-08
Vertiz, Oscar R.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
423 41, C01G 310
Patent
active
039624021
ABSTRACT:
A method is described for the oxidation-leaching of chalcopyrite concentrates at high temperatures and pressures for the extraction of copper values as copper sulfate in which temperatures are maintained between about 425.degree. and 450.degree.F, oxygen partial pressures of between about 50 and 200 psi are provided, and levels of acidity are permitted to increase above about 50 grams of H.sub.2 SO.sub.4 per liter in order to obtain maximum rates of extraction of virtually all of the copper. Thereafter, while maintaining the temperature and pressure at elevated levels, the acidity of the slurry is reduced to between about 10 and 40 grams of H.sub.2 SO.sub.4 per liter in order to obtain reduction of dissolved iron to optimal levels. The resulting slurry is then cooled and further processed for the production of a very pure copper sulfate solution.
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Evans et al., Editors, International Symposium on Hydrometallurgy AIME, New York, 1973, pp. 375-402.
Freeport Minerals Company
Hearn Brian E.
Schapira Ronald A.
Vertiz Oscar R.
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