Method for processing complex metal sulphide materials
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United States of America Patent
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Mar 14, 1995
Grant Date -
N/A
app pub date -
Oct 21, 1993
filing date -
Jun 19, 1991
priority date (Note) -
Expired
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Abstract
A process for the treatment of complex metal sulphide materials and for the recovery of metal values from such materials. The process involves first subjecting the material to a leaching process under conditions such that sulphide-sulphur is oxidized to sulphate and such that oxidized iron and impurities such as As will pass into solution, whereafter the leaching residue is melted for conventional pyrometallurgical recovery of the metal values. Different embodiments of the process provide for the recovery of precious metal values from refractory materials containing such values and for the recovery of metal from complex copper concentrate and complex nickel concentrate.
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