Chromium recovery from superalloy scrap by selective...

Details Chromium recovery from superalloy scrap by selective... Chromium recovery from superalloy scrap by selective...

C - Chemistry, Metallurgy

22

B

53/119

C22B 7/00 (2006.01) C22B 34/32 (2006.01)

Patent

CA 1170060

PC -2112/CAN Abstract of the Disclosure To recover chromium and other metals from scrap such as superalloy scrap, the scrap is sulfided to provide a molten matte which is cooled and fragmented, the fragments are leached selectively in an aqueous solution with chlorine at a controlled temperature and with agitation while con- trolling chlorine flow by redox potential to provide the major portion of the chromium in the leach residue and dissolving other valuable metals present as chlorides and thereafter recovering the chromium from the solid.

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