Removal of copper from ferrous scrap

Details Removal of copper from ferrous scrap Removal of copper from ferrous scrap

1987-07-30

1990-05-15

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

C21C 776

Patent

active

049254880

ABSTRACT:
A process for removing copper from ferrous or other metal scrap in which the scrap is contacted with a polyvalent metal sulfide slag in the presence of an excess of copper-sulfide forming additive to convert the copper to copper sulfide which is extracted into the slag to provide a ratio of copper in the slag to copper in the metal scrap of at least about 10.

REFERENCES:
patent: 671988 (1901-01-01), Burfeind
patent: 1377217 (1921-01-01), Mullen
patent: 1425701 (1922-01-01), Sem
patent: 2115300 (1938-04-01), Butcher
patent: 2512578 (1950-01-01), Jordon
patent: 3441404 (1969-01-01), Ivey
patent: 3666441 (1968-11-01), Milner

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