Dry process for refining zinc sulfide concentrates

Details Dry process for refining zinc sulfide concentrates Dry process for refining zinc sulfide concentrates

1991-09-30

1993-01-12

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75696, 423107, 423108, C22B 1904, C22B 1300

Patent

active

051786672

ABSTRACT:
A pyrometallurgical refining process for obtaining one or both of zinc and lead from a sulfide concentrate, in which an iron-silicate slag or iron-silicate slag containing lime is formed and the sulfide concentrate, incombustible materials, and flux, together with at least one of industrial oxygen, oxygen-enriched air, or air, are blown into the slag to cause a reaction; as a result of the reaction, the major part of the zinc and part of the lead in the sulfide concentrate and the incombustible materials are dissolved in the slag, to arrange the slag and a matte and/or metal from one part of the lead in the raw material. A reducing agent such as heavy oil, pulverized coal, powdered coke, or the like is blown through the resulting slag, and the zinc and the lead in the slag are volatilized then condensed to obtain molten zinc and molten lead.

REFERENCES:
patent: 4741770 (1988-05-01), Andrews et al.

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