C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/278
C22B 15/00 (2006.01) C21B 3/04 (2006.01) C22B 7/04 (2006.01)
Patent
CA 1093834
K-0456-KCC ABSTRACT OF THE DISCLOSURE An improved process is disclosed for pyrometal- lurgical recovery of copper from slag material containing both dissolved and/or entrained copper values. The copper-bearing slag material is melted and treated with a hydrocarbonaceous or hydrogenous reductant in a rotary furnace, such as a top-blown rotary reactor, rotating at at least about 10 rpm, to form a high-grade copper matte phase and a slag phase of reduced copper content. The rotation of the reactor is discontinued and the high-grade copper matte phase is allowed to separate from the slag phase and is then removed from the reactor. The reactor containing the remaining slag of reduced copper content is again rotated at about 10 rpm, and iron sulfide, e.g. pyrite is added to the slag in the rotating reactor to provide a low-grade matte phase which literally "washes out" most of the remaining copper contained in the slag. The low-grade matte phase is recovered, and the remaining slag phase is discarded.
257012
Donaldson John W.
Sharma Shree N.
Themelis Nickolas J.
Kennecott Copper Corporation
Kirby Eades Gale Baker
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