Reduction roasting of metal ores
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United States of America Patent
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Jan 15, 1991
Issued Date -
N/A
app pub date -
Jul 20, 1988
filing date -
Feb 14, 1985
priority date (Note) -
Expired
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Abstract
A process is provided for the reduction roasting of ores using a C.sub.2 to C.sub.8 hydrocarbon. The process is particularly applicable to manganese dioxide containing ores and provides enhanced reduction of the manganese to lower oxidation states at low operating temperatures for manganese dioxide ores and provides increased silver recoveries from refractory manganese-silver ores.
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