| 摘要 |
<p>A powered bowl assembly includes walls (21) and a tubular shaft (4) journalled within a base (1) of the apparatus. A pressurized air flow is discharged into slurry in the bowl assembly via a circular array of bubble generators (10). An impeller (13) discharges the slurry outwardly against an upwardly inclined annular surface (18) of the bowl assembly to cause the slurry to merge upwardly with the streams to promote flotation. Slurry within the bowl assembly forms a vortex (V) with particle flotation forming a froth layer (F) inwardly of the slurry vortex (V). The froth exits the bowl assembly upwardly past a barrier (30) partially closing the bowl assembly. Heavier gangue particles exit via an outlet (29) about the bowl assembly periphery. A collector shroud (32) is partitioned to receive the froth and the heavier waste material. A modified form of the apparatus includes an independently powered bowl assembly and impeller.</p> |
