Selective recovery of base metals and precious metals from ores
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United States of America Patent
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Apr 10, 1984
Grant Date -
N/A
app pub date -
Oct 20, 1982
filing date -
Oct 20, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Metal values are recovered from ore concentrates by forming a sulfide matte, grindng the matte, leaching with sulfuric acid at elevated temperature to selectively extract nickel and iron, and roasting and leaching the residue with dilute sulfuric acid to selectively extract copper. The residue contains a high concentration of platinum, palladium and gold.
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