Hydrometallurgical process for the recovery of valuable...

Details Hydrometallurgical process for the recovery of valuable... Hydrometallurgical process for the recovery of valuable...

C - Chemistry, Metallurgy

22

B

53/372, 204/70

C22B 7/00 (2006.01) C01B 19/00 (2006.01) C01B 19/02 (2006.01) C22B 3/08 (2006.01) C22B 7/04 (2006.01) C25C 1/00 (2006.01) C25C 1/20 (2006.01) C25C 1/22 (2006.01)

Patent

CA 1059771

ABSTRACT OF THE DISCLOSURE A hydrometallurgical process for the recovery of silver, selenium and tellurium from the anode slime produced in the electrolytic refining of copper or lead or from other raw materials bearing these metals, wherein the raw material and concentrated sulfuric acid or oleum are heated at approx. 160-300°C, preferably 160-200°C, in order to sulfate the nickel and the possible copper. The concentrated sulfuric acid in which the silver, selenium, barium, and tellurium present in the raw material have dissolved is separated from the undissolved solid material so that the sulfuric acid can be treated separately for the recovery of Ag, Se, and Te and the solid material separately for the recovery of valuable components present in it.

236903

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