Centrifugal flotation apparatus
US4874357A · kind A · utility
Inventor
Key dates
| Filing date | Mar 27, 1989 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Mar 27, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03D1/1493
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The apparatus includes a powered bowl assembly having a tubular shaft journalled within a base of the apparatus. A pressurized air flow is discharged into slurry in the bowl assembly via a circular array of bubble generators. An impellor discharges the slurry outwardly against an upwardly inclined annular surface 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 with particle flotation forming a froth layer inwardly of a slurry vortex. The froth exits the bowl assembly upwardly past a barrier partially closing the bowl assembly. Heavier gangue particles exit via an outlet about the bowl assembly periphery. A collector shroud is partitioned to receive the froth and the heavier waste material. A modified form of the apparatus includes an independently powered bowl assembly and impellor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.