Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1993-05-19
1994-08-09
Lithgow, Thomas M.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
209168, 2102212, 2611221, 261123, 261124, B03D 124, B03D 114
Patent
active
053357850
ABSTRACT:
An apparatus for separating by froth flotation hydrophobic and hydrophilic particles contained in an aqueous slurry, the apparatus comprising a generally vertical tubular column having an upper froth zone, an upper separation zone, a lower separation zone, an air inlet zone, and an intermediate feed inlet zone; a feed inlet, air inlet, froth outlet and a tailings outlet; an upper baffle unit comprising a plurality of horizontally extending upper baffle plates, a vertical upper support member including an upper end portion, and first upper apparatus for removably mounting the upper baffle plates on the upper support member at predetermined vertically spaced positions; each of the upper baffle plates comprising a mounting aperture and a plurality of flow apertures; and a second upper apparatus for removably supporting the upper support member in the column with the upper baffle plates in the upper separation zone. The apparatus can include a lower baffle unit. The open area of each baffle plate and the vertical space between adjacent baffle plates can vary between different baffle plates in dependence upon the position of a baffle plate in the column, or in dependence upon one or more of the following: a solids flow rate at the position, a liquid flow rate at the position, and a gas flow rate at the position. The invention also provides a method for improving the operating performance of an unbaffled column.
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Eisele Timothy C.
Kawatra Surendra K.
Board of Control of Michigan Technological University
Lithgow Thomas M.
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