Improved tellurium extraction from copper electrorefining...

Details Improved tellurium extraction from copper electrorefining... Improved tellurium extraction from copper electrorefining...

C - Chemistry, Metallurgy

01

B

C01B 19/02 (2006.01) C22B 3/08 (2006.01) C22B 61/00 (2006.01)

Patent

CA 2278834

The present invention is concerned with a method for the substantially selective extraction of tellurium from copper electrorefining slimes. The method comprises maintaining a molar ratio Ag/Se, Ag/S or Ag/Se+S at a value of about 2 or less in the slimes during leaching thereof in an autoclave. The excess of selenium and/or sulphur allows the formation of Ag2Se or Ag2S, which remains insoluble during autoclave leaching.

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