Removal of copper from ferrous scrap
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United States of America Patent
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May 15, 1990
Grant Date -
N/A
app pub date -
Jul 30, 1987
filing date -
Jul 30, 1987
priority date (Note) -
Expired
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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.
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