| 摘要 |
A froth crowder device (10) is disclosed for incorporation into a froth flotation cell (12) to improve the froth removal dynamics of the flotation cell. The froth crowder device (10) is positioned within a froth flotation cell (12) above and below the overflow launder, and provides a sloped surface to direct froth toward the overflow launder (28) in an expedited manner. Experimental data confirms that use of a froth crowder device (10) as disclosed expedites movement of the froth toward the launder (28) for more efficient operation, permits operating the rotor (46) of the flotation cell (12) 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 (12) in which a crowder device (10) 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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