Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1981-12-29
1983-10-18
Andrews, M. J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 79, C22B 1306
Patent
active
044103611
ABSTRACT:
A batch process for desilverizing and refining lead bullion containing antimony and a low silver content, including the steps of melting the lead bullion, adding calcium to form a floating silver-rich dross containing a silver-antimony-calcium compound and separating the dross from the desilverized, molten lead bullion. The process further comprises a plurality of successive batch operations wherein silver-rich dross is separated and accumulated in each batch operation for subsequent processing. The successive batch operations are maintained at about 400.degree. C. in order to effect significant savings in energy, time and labor over processes previously used.
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Dunlevey Francis M.
Mehta Jitesh R.
Andrews M. J.
GNB Batteries Inc.
Hipp Augustus J.
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