Method of producing blister copper from copper raw material cont

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

1979-04-12

1981-01-13

Edmundson, F. C.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 74, 75 75, C22B 1500

Patent

active

042447330

ABSTRACT:
PCT No. PCT/SE78/00030 Sec. 371 Date Apr. 19, 1979 Sec. 102(e) Date Apr. 12, 1979, PCT Filed Aug. 11, 1978 PCT Pub. No. WO 79/00104 PCT Pub. Date Mar. 8, 1979.
A method of producing blister copper from raw material containing 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 reduce 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 performing 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 percent by weight. The rotary converter is suitably operated with a rotation corresponding to a peripheral speed of approximately 0.5-7 m/s, preferably 2-5 m/s.

REFERENCES:
patent: 3069254 (1962-12-01), Queneau et al.
patent: 3432289 (1969-03-01), Spitz et al.
patent: 3516818 (1970-06-01), O'Neill et al.
patent: 3615361 (1971-10-01), Queneau et al.
patent: 3615362 (1971-10-01), Warner et al.
patent: 3884680 (1975-05-01), Bie

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