Copper refining and novel flux therefor

Details Copper refining and novel flux therefor Copper refining and novel flux therefor

1980-10-20

1982-03-09

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 93AD, C22B 1500

Patent

active

043187374

ABSTRACT:
A method for removing lead and other basic impurities from copper during refining of the copper comprises treating molten copper to be refined with a slag having a final composition including iron oxide, calculated as Fe.sub.2 O.sub.3 and silica (SiO.sub.2) wherein the weight ratio of iron oxide to silica is from 0.4 to 0.8. The novel slag preferably contains less than 10% boric oxide and up to 30% phosphorus pentoxide.

REFERENCES:
patent: 3561952 (1971-02-01), Greenberg
patent: 3776718 (1973-12-01), Leak
patent: 4058395 (1977-11-01), Sole
Stolarczyk et al. Journal of the Institute of Metals vol. 86, pp. 49-58, 1957. _

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