C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 13/02 (2006.01) C22B 19/00 (2006.01) C22B 19/02 (2006.01) C22B 19/20 (2006.01) C22B 19/32 (2006.01)
Patent
CA 2052647
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.
Akada Akihiko
Kemori Nobumasa
Kusakabe Takeshi
Takano Hitoshi
Takebayashi Masaru
Marks & Clerk
Sumitomo Metal Mining Co. Ltd.
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