Copper smelting process

Details Copper smelting process Copper smelting process

C - Chemistry, Metallurgy

22

B

C22B 15/06 (2006.01) C22B 15/00 (2006.01)

Patent

CA 2055819

ABSTRACT OF THE DISCLOSURE 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 sul- furic 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 prefera- bly introduced into the converting furnace.

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