Copper smelting process

Details Copper smelting process Copper smelting process

1991-11-20

1993-01-19

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75641, 75643, C22B 1500

Patent

active

051804220

ABSTRACT:
A copper smelting process is disclosed in which copper concentrate is smelted in a furnace to produce purified copper. Flue gas discharged from the furnace is treated to produce sulfuric acid. Furthermore, waste liquid discharged during the production of sulfuric acid is treated to produce gypsum, and the gypsum thus produced is recycled to the furnace as a flux. The flue gas may be exhausted from either or both of a smelting furnace and a converting furnace, and the gypsum may be preferably introduced into the converting furnace.

REFERENCES:
patent: 2111789 (1938-03-01), Kuzell
patent: 2129760 (1938-09-01), Greenawalt
patent: 3281236 (1966-10-01), Meissner
patent: 3857701 (1974-12-01), Hunter

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