Direct sulphidization fuming of zinc

Details Direct sulphidization fuming of zinc Direct sulphidization fuming of zinc

C - Chemistry, Metallurgy

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B

C22B 19/04 (2006.01) C22B 4/04 (2006.01) C22B 5/16 (2006.01) C22B 7/00 (2006.01) C22B 7/02 (2006.01) C22B 7/04 (2006.01) C22B 19/34 (2006.01)

Patent

CA 2095436

2095436 9208815 PCTABS00013 A process for the treatment of zinc sulfide or other zinc bearing feed materials in conjunction with an iron sulfide containing mineral or compound to effect a separation of zinc from iron by fuming of either zinc and sulphur vapour or zinc sulphide vapour. The vapour is stripped and transported by a carrier gas from the mineral or a molten matte formed from the mineral. The process is operated at a temperature in the region of 1250 to 1400 ·C and at a partial pressure of oxygen in the region of 10-7 to 10-11 bar. The process is conducted in the presence of a liquid matte phase which contains at least iron sulphide and which is intimately mixed in a bath with a slag phase.

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