Leaching of Ni-Cu-Fe-S matte

Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge

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423 34, 423 41, 423150, C25C 112

Patent

active

040947548

ABSTRACT:
Nickel is selectively leached efficiently and rapidly from Ni-Cu-Fe-S matte under oxidizing conditions at ordinary pressure by controlling in combination the following variables: (1) the acid-to-copper mole ratio in the leaching solution, (2) the temperature, and (3) the sulfur content of the matte, whereby an enriched nickel solution is obtained low in copper and iron.

REFERENCES:
patent: 3293027 (1966-12-01), Mackiw et al.
patent: 3741752 (1973-06-01), Evans et al.
patent: 3914374 (1975-10-01), Koehler et al.
patent: 3962051 (1976-06-01), Symens et al.
Llanos et al. "Atmospheric Leaching of Matte at the Port Nickel Refinery" C.I.M. Bulletin, Feb., 1974, pp. 74-81.

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