Method of producing blister copper from copper raw material...

Details Method of producing blister copper from copper raw material... Method of producing blister copper from copper raw material...

C - Chemistry, Metallurgy

22

B

53/282

C22B 15/06 (2006.01) C22B 15/00 (2006.01)

Patent

CA 1111658

A B S T R A C T A method of producing blister copper from raw material contain- ing antimony. The invention is characterized in that a slag is separated from copper matte formed by smelting the raw material. Thereafter the matte is brought into contact, under violent agitation preferably in a rotary converter of the Kaldo type, with a substantially inert gas in a quantity sufficient to re- duce by volatilization the antimony content of the copper matte and, possibly, also the content of other impurities such as bismuth, arsenic and zinc to a level acceptable when perfor- ming the subsequent converting process, so as to obtain the desired blister copper product, preferably a maximum content of antimony, 0.04 percent by weight and of bismuth 0.03 per- cent by weight, The rotary converter is suitably operated with a rotation corresponding to a peripheral speed of approxima- tely 0,5 - 7 m/s, preferably 2-5 m/s.

308395

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