Process for beneficiation of coal and associated apparatus
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United States of America Patent
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-
Jan 9, 1990
Grant Date -
N/A
app pub date -
Apr 20, 1989
filing date -
Apr 20, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for removing mineral matter from coal is disclosed. The process involves creating ultrafine coal by pulverizing the coal feed material and mixing it with an aqueous amine solution. The coal/amine solution is fed into a flotation cell and gaseous carbon dioxide is charged into the cell. The carbon dioxide reacts with the amine solution to form bubbles which carry the 'clean' coal component of the coal feed material to the top of the cell for subsequent removal from the cell. The bubbles are reduced in size as they move up within the cell. The mineral matter, which is heavier than the clean coal, stays at the bottom of the cell and can be removed spearately. The amine and the carbon dioxide used in the process can be recycled. An associated apparatus is also disclosed.
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