Method for desilverizing and removal of other metal values...

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

C - Chemistry, Metallurgy

22

B

53/339

C22B 13/08 (2006.01) C22B 7/04 (2006.01) C22B 13/06 (2006.01)

Patent

CA 1201596

METHOD FOR DESILVERIZING AND REMOVEL OF OTHER METAL VALUES FROM LEAD BULLION Abstract of the Disclosure 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°C in order to effect significant savings in energy, time and labor over processes previously used.

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