Method for the microwave induced oxidation of pyritic ores without the production of sulphur dioxide
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United States of America Patent
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Oct 26, 1999
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app pub date -
Jan 16, 1998
filing date -
Aug 27, 1996
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Abstract
Pyritic ores are heated with microwave energy in a fluidized bed to a temperature in the range of approximately 573 degrees Kelvin to 823 degrees Kelvin with a controlled amount of oxygen to promote the oxidation of the pyritic ores according to the reaction: 2FeS.sub.2 +3/2 O.sub.2 .fwdarw.Fe.sub.2 O.sub.3 +4S, thereby preventing the production of sulphur dioxide.
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