Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1995-11-02
1997-03-18
Lithgow, Thomas M.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
209169, B03D 114, B03D 116
Patent
active
056119178
ABSTRACT:
A froth crowder device is disclosed for incorporation into a froth flotation cell to improve the froth removal dynamics of the flotation cell. The froth crowder device is positioned within a froth flotation cell above and below the overflow launder, and provides a sloped surface to direct froth toward the overflow launder in an expedited manner. Experimental data confirms that use of a froth crowder device as disclosed expedites movement of the froth toward the launder for more efficient operation, permits operating the rotor of the flotation cell at reduced speeds without compromising the efficiency of operation, and reduces the amount of air necessary to produce a froth in the cell. Experimental data also confirms that little or no surface eddies are observed in froth flotation cells in which a crowder device as disclosed is used. By comparison, flotation cells without use of a crowder device experience increased occurrences of surface eddies which traps the froth within the tank and extends froth residency time to the ultimate detriment of separation efficiency.
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Baker Hughes Incorporated
Lithgow Thomas M.
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