Treatment of base metal smelter slag
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United States of America Patent
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Issued Date -
Sep 13, 2007
app pub date -
Aug 31, 2006
filing date -
Mar 10, 2006
priority date (Note) -
Abandoned
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Abstract
A process for treating base metal smelter slag containing from about 20 to about 60 percent by weight iron and at least one further metal selected from the group consisting of nickel, copper and cobalt comprises mixing base metal smelter slag with calcium sulphate and carbon and melting the resultant mixture to produce a metallic sulphide matte containing substantially all the further metal or metals and a secondary slag substantially free of the further metal or metals suitable for use as a cement.
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