Method of recovering zinc

Details Method of recovering zinc Method of recovering zinc

C - Chemistry, Metallurgy

22

B

C22B 19/20 (2006.01) C22B 5/02 (2006.01) C22B 19/04 (2006.01)

Patent

CA 2096050

ABSTRACT Zinc is recovered from zinc sulphide material by introducing such material at a feed station into a molten copper sulphide matte which is circulated in a closed loop path through said feed station, a zinc recovery station and an oxidising station. The matte is heated electrically directly by resistive heating. Oxygen in the absence of other gases is introduced at the oxidising station. Sulphur dioxide is removed in a sulphuric acid plant. The method is operated to keep the activity of copper in the total matte at less than unit activity. Virtually zero gas emission is possible.

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