Method of tellurium separation from copper electrorefining...

Details Method of tellurium separation from copper electrorefining... Method of tellurium separation from copper electrorefining...

C - Chemistry, Metallurgy

01

B

C01B 19/02 (2006.01) C22B 3/08 (2006.01) C22B 7/02 (2006.01) C22B 15/00 (2006.01) C22B 61/00 (2006.01)

Patent

CA 2049276

A method of increasing the extraction of tellurium from copper electrorefining slime comprises leaching the slime with dilute sulphuric acid in a reactor under a partial oxygen pressure of up to 150 psi and at an elevated temperature between about 100 and 200°C until copper, nickel and substantially all of the tellurium is dissolved, thereby forming a leach slurry, and contacting the slurry with an appropriate reducing agent immediately after the leaching operation has been halted and the leaching reactor brough back to atmospheric pressure to reprecipitate any excessive quantities of silver and selenium solubilized during the leaching operation.

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