Direct smelting or zinc concentrates and residues

Details Direct smelting or zinc concentrates and residues Direct smelting or zinc concentrates and residues

1994-07-28

1995-08-22

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 103, 75636, 75658, 75669, 75670, C22B 702, C22B 1904

Patent

active

054436141

ABSTRACT:
The present invention is concerned with a process for the direct smelting of zinc containing materials. The process includes volatilizing zinc from zinc-containing materials into a gas phase, while sulphur is fixed as iron sulphide in a Fe-S-O matte. Thereafter, zinc is recovered in metallic form with a suitable condenser apparatus from a zinc laden gas consisting of Zn(g), CO, CO.sub.2 and N.sub.2. Other metals like silver, cadmium, mercury and lead may also be recovered in this manner.

REFERENCES:
patent: 4514221 (1985-04-01), Goto
patent: 5131944 (1992-07-01), Malmstrom et al.
patent: 5178667 (1993-01-01), Kemori et al.
patent: 5196047 (1993-03-01), Aune
Asteljoki et al., "Production of zinc by flash smelting of calcined concentrates", in Extraction Metallurgy '89 Symposium, London, Jul. 10-13, 1989.
Yazawa, "Thermodynamic evaluatons of extractive metallurgical processes", in Metallurgical Transactions B, 1979, vol. 10B, 307-321.
Davey et al., "The direct smelting of zinc sulphide concentrate", in the proceedings of Australia/Japan Extractive Metallurgy Symposium, Sydney, Jul. 16-19, pp. 23-29 1980.
Kellogg, "Energy use in zinc extraction", in the proceedings of the World symposium on metallurgy and environmental control, Las Vegas, Feb. 24-28, 1980, pp. 28-47.

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