Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1989-04-20
1990-01-09
Lacey, David L.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
209166, 209168, 209170, B03D 102, B03D 110, B03D 112
Patent
active
048926485
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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Lacey David L.
Lithgow Thomas M.
Silverman Arnold B.
Viking Systems International, Inc.
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