C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/282
C22B 15/14 (2006.01) C22B 15/00 (2006.01)
Patent
CA 1078627
ABSTRACT OF THE DISCLOSURE A method for continuously refining copper in the molten phase. The molten copper is passed, in a treatment area, through a plurality of reaction zones, in counterflow to the heating gases, and thus freed of impurities. The final reaction zone, in the direction of flow of the molten metal, is supplied with fuel and an oxygen-containing primary gas in less than stoichio- metric amount. The combustion of the primary gas, in the absence of oxygen, produces a reducing heating gas, and in the zones before the final reaction zone, afterburning is brought about of the still unburned fuel carried along with the heating gas by an additional supply of an oxygen-containing secondary gas. The supply of at least the secondary gas is effected in a manner such that it is first brought into reactive contact with the molten phase of the bath of metal, thus effecting a definite transfer of substances into the metal bath. Thereafter the secondary gas is caused to burn with the heating gas. ,
253063
Melcher Gerhard
Weigel Horst
Wuth Wolfgang
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