Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1978-04-10
1979-09-18
Hearn, Brian
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
423 41, 423 47, 75 7, C25C 112
Patent
active
041682173
ABSTRACT:
A copper-containing sulfidic material is dead-roasted at a temperature of at least 750.degree. C. and the resulting calcine is leached in a sulfuric acid solution to dissolve most of the copper in preference to any iron, nickel and cobalt in the material.
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Shirts et al., "Double Roast-Leach Electrowinning Process for Chalcopyrite Concentrates", U.S. Bureau of Mines R.I7996 (1975).
Quenean, Editor, Extractive Metallurgy of Copper, Nickel, Cobalt Interscience Publishers, N.Y., 1961, p. 26, [TN780M4].
Bell Malcolm C. E.
Dalvi Ashok D.
Sridhar Ramamritham
Hearn Brian
MacQueen Ewan C.
Messulam Lewis
The International Nickel Company Inc.
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