Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1977-04-15
1978-10-17
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 7, 75 21, 75 82, 75117, C22B 1500
Patent
active
041206975
ABSTRACT:
Copper is separately recovered from at least one nickeliferous sulfidic material selected from the group consisting of ore, ore concentrates, mattes or other metallurgical intermediates by roasting the sulfidic material to produce a calcine, mixing the calcine with a particulate carbonaceous reductant and with at least one halide heat transformable to halogen or to hydrogen halide at a segregation roasting temperature in small but effective amounts to halogenate copper values contained in the calcine, heating the mixture to a segregation roasting temperature between about 650.degree. C and about 700.degree. C whereby copper values contained in the calcine react to form a halide which is transported as a halide to the particulate carbonaceous reductant and metallic copper is precipitated from the copper halide on the surface of the carbonaceous reductant. The precipitated metallic copper is recovered as a highly enriched concentrate containing at least about 90% of the copper contained in the starting sulfidic material.
REFERENCES:
patent: 1865153 (1932-06-01), Taplin
patent: 2425760 (1947-08-01), Sproule et al.
patent: 3453101 (1969-07-01), Takahashi et al.
patent: 3799764 (1974-03-01), Opie et al.
patent: 3871867 (1975-03-01), Last et al.
Coffin Lamar D.
Opie William R.
Amax Inc.
Andrews M. J.
Ciomek Michael A.
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