Dead roast-oxide flash reduction process for copper concentrates

Details Dead roast-oxide flash reduction process for copper concentrates Dead roast-oxide flash reduction process for copper concentrates

1982-04-16

1983-12-20

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 26, 75 74, 75 92, C22B 1500

Patent

active

044215525

ABSTRACT:
The present invention contemplates providing a finely divided copper calcine and thereafter subjecting the calcine to reduction flash smelting. Indeed, significant processing advantages are achieved by dead roasting a finely divided copper concentrate, especially in a fluid bed reduction zone, and thereafter subjecting the resulting calcine to reduction flash smelting. Gases from the dead roaster and the flash smelter are combined for SO.sub.2 recovery in an acid plant.

REFERENCES:
patent: 3589892 (1971-06-01), Peterson
patent: 3799764 (1974-03-01), Opie et al.
patent: 3857701 (1974-12-01), Hunter et al.
patent: 4006010 (1977-02-01), Rajcevic et al.
patent: 4073645 (1978-02-01), Fritsch
patent: 4113470 (1978-09-01), Aaltonen et al.

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