Method for desilverizing and removal of other metal values from

Details Method for desilverizing and removal of other metal values from Method for desilverizing and removal of other metal values from

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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