Method of concentrating slurried kaolin
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United States of America Patent
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Aug 6, 1991
Grant Date -
N/A
app pub date -
Dec 27, 1988
filing date -
Dec 27, 1988
priority date (Note) -
Expired
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Abstract
An aqueous beneficiated clay slurry is concentrated from a lower solids content to a higher solids content by evaporating water therefrom by passing the aqueous clay slurry through one or more non-contact evaporative heat exchangers in indirect heat exchange relationship with a hot drying fluid. The driving fluid, that is the heating medium which is passed in indirect heat exchange relationship with the aqueous clay slurry to initiate the evaporation process, comprises a hot liquid, preferably a moderate temperature hot liquid such as hot water having a temperature ranging from about 120.degree. F. to about 200.degree. F.
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