Treatment of dross

Details Treatment of dross Treatment of dross

C - Chemistry, Metallurgy

22

B

53/282

C22B 7/00 (2006.01) C01G 21/21 (2006.01) C22B 7/04 (2006.01) C22B 13/02 (2006.01) C22B 15/00 (2006.01)

Patent

CA 1232141

ABSTRACT Lead constituents may be removed from a dross to produce a copper matte low in lead assay by melting the dross at a temperature in excess of 900°C, allowing the molten dross to separate into a lead bullion layer and a matte layer, removing the lead bullion layer from the matte layer, then heating the matte layer to a temperature in excess of 1000°C, and removing the lead sulfide therefrom as a fume.

468099

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