Biochemical oxidation system and process
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United States of America Patent
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Oct 9, 2001
Grant Date -
N/A
app pub date -
Dec 23, 1997
filing date -
Dec 23, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A biochemical oxidation system and process is disclosed for the removal of insoluble sulfides from metal ores. A liquid mixture of an ore slurry and of a liquid biochemical oxidation medium is flowed through a plurality of covered overflow tanks connected in series. The liquid mixture is continuously aerated in an aeration chamber formed in the tanks with a mixture of a purified oxygen gas and a purified carbon dioxide gas as introduced into the aeration chamber. A substantially sulfide-free liquid mixture is discharged from a last tank into a clarifier in which at least a portion of the biochemical oxidation medium is separated from the liquid mixture for recirculation into the tanks.
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