Chromium recovery from superalloy scrap by selective chlorine le

Details Chromium recovery from superalloy scrap by selective chlorine le Chromium recovery from superalloy scrap by selective chlorine le

1980-06-03

1983-03-22

Hearn, Brian E.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75114, 75119, 75 84, 423 48, 423150, C22B 3432

Patent

active

043774105

ABSTRACT:
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 controlling 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.

REFERENCES:
patent: 3767760 (1973-10-01), Hougen
patent: 3847594 (1974-11-01), Van Der Meulen
patent: 4150975 (1979-04-01), Miyake
patent: 4259296 (1981-03-01), Hennion

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