Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1990-02-28
1991-12-24
Weisstuch, Aaron
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75634, 75632, 75633, 75643, 75648, 423 40, 423 39, 423 48, 423 46, 423 23, 423147, 423103, C22B 1112
Patent
active
050749102
ABSTRACT:
The present invention is a process to recover precious metals from sulfide ores. It involves chlorinating a mixture of an ore concentrate and salt to form a liquid melt. The salt preferably contains potassium chloride. This chlorination is carried out at a temperature between 300.degree. and 600.degree. C. while stirring. The process converts precious metals in the elemental and sulfide forms into precious metal chlorides which are recovered by subsequent processing steps.
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Cavalieri V. J.
Chevron Research and Technology Company
DeJonghe T. G.
Squillante Edward
Weisstuch Aaron
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