Coal cleaning by gaseous carbon dioxide conditioning and froth flotation
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United States of America Patent
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Jun 30, 1987
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N/A
app pub date -
Sep 23, 1985
filing date -
Sep 23, 1985
priority date (Note) -
Expired
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Abstract
A process for froth flotation of coal using gaseous carbon dioxide includes a preconditioning treatment of the coal with gaseous carbon dioxide followed by froth flotation, preferably also using gaseous carbon dioxide. The pretreatment causes the coal to show improved results in that less reagent promoter and frother are required, and the flotation time is reduced. The process is particularly useful for producing 'super' clean coal.
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