Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1988-05-17
1989-06-13
Schor, Kenneth M.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
209170, 209211, 2105121, 2102212, 210788, 261122, B03D 102, B04C 5103, B04C 516
Patent
active
048384348
ABSTRACT:
The present invention is directed to air sparged hydrocyclone flotation apparatus and methods for separating particles from particulate suspensions (such as coal and mineral ore slurries), wherein fluid discharge is removed annularly from a flotation vessel. Preferably, the flotation apparatus includes a vertically oriented cylindrical flotation vessel having a tangential inlet at its upper end and an annular outlet at its lower end. The annular outlet allows for the smooth exit of fluid discharge from the flotation vessel so as to avoid disturbance of the fluid flow within the flotation vessel. Air is sparged into the vessel and a froth which contains the recovery products exits through a vortex finder positioned in the upper end of the vessel. The apparatus includes a froth pedestal positioned within the vessel which forms the annular outlet with the wall of the vessel. The froth pedestal may take a generally cylindrical or a generally conical configuration. The conical froth pedestal extends into the vessel from near the bottom of the vessel to at least one-half the distance to the vortex finder. The froth pedestal further serves, among other things, to support the froth column formed within the flotation vessel and isolate the froth column from the fluid discharge so as to minimize mixing therebetween.
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Miller Jan D.
Yi Ye
Lithgow Thomas M.
Schor Kenneth M.
University of Utah
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