Process for the refining of a metal sulfide melt

Details Process for the refining of a metal sulfide melt Process for the refining of a metal sulfide melt

C - Chemistry, Metallurgy

22

B

53/361

C22B 15/14 (2006.01) C22B 9/02 (2006.01) C22B 9/10 (2006.01) C22B 15/00 (2006.01)

Patent

CA 1078190

ABSTRACT OF THE DISCLOSURE A process for removing the impurities, such as arsenic, antimony, bismuth, and/or lead, from a metal sulfide melt, such as copper sulfide melt, in which there is a melt solubility gap between the metal to be refined and its sulfide, in which the metal sulfide melt is first sulfidized in order to shift the composition of the melt away from the range of the solubility gap and the sulfidized metal sulfide melt is thereafter exposed to a selective chlorination to remove the impurities as vaporiz- able chlorides from the metal sulfide melt by a technique known per se, while the sulfur concentration in the melt is simultan- eously controlled in such a manner that the composition of the melt remains outside the said melt solubility gap.

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