Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1988-05-02
1989-11-21
Kastler, S.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75108, C22B 1308
Patent
active
048819719
ABSTRACT:
A method of removing bismuth from lead wherein the lead is melted, barium is dissolved in the lead optionally with magnesium, calcium or strontium, the melt is cooled, and dross which contains barium is removed from the melt. The barium is preferably added as a barium lead alloy which is produced by electrolysis of a mixture of barium sulphide, barium fluoride and potassium fluoride.
REFERENCES:
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patent: 4135993 (1979-01-01), Um
patent: 4157946 (1979-06-01), Hyvarinen
Van Der Merwe, J. T. L., et al., The Debismuthing of Lead: A Review of Practise, 8/15/78.
Davey, T. R. A., Trans.AIME, 206, pp. 341-350 (1956).
Hey, J. D., et al., Development of a Continuous Process for the Fine Debismuuthing of Lead, undated.
Jollivet, L., et al., Journal of Metals, 3/64, pp. 235-237.
Rudiger, W., Erzmetall, 12/1974, Heft, 12, pp. 599-603.
Kuanysheva, K. S., et al., The Bulletin of the Bismuth Institute, Second Quarter, 12/1975.
Emicke, K., et al., AIME World Symposium 12, 1970 on Mining and Metallurgy of Lead and Zinc, vol. 2.
Smirnov, M. P., et al., Tsvetnye Metally No. 1, 12/1975, pp. 22-24 (translation).
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