| 摘要 |
A centrifuge concentrator bowl (10) includes a plurality of fluidized recesses (30) at axially spaced positions along the peripheral wall (12) and between each fluidized recess and the next is provided a shallower recess which is non-fluidized (40) which provides some collection of materials. The bowl is of a frusto-conical shape so that the open mouth (13) is larger than the base (11) and a restricting ring (70) is attached at the open mouth to define an inner edge of a diameter less than that of the uppermost recess and approximating that of a recess lower in the bowl. The uppermost recess is a fluidized recess and a series of the lowermost recesses are non-fluidized. In one embodiment, the bowl includes a first frusto-conical wall portion with no recesses, a second portion with a series of non-fluidized recesses with a fluidized land portion between each and the next, and a third portion having two fluidized recesses with inserts to provide a reduced volume. The bowl acts to reduce water requirement and to improve the richness of the concentrate by reducing the volume of start-up material retained with the heavier materials collected. |
