Apparatus and method for froth flotation separation of the components of a slurry
US4347127A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1981 |
| Grant date | Aug 31, 1982 |
| Priority date | — |
| Expiry date | Jan 29, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L9/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved method and apparatus for froth flotation separation of the components of a slurry, having particular utility for the beneficiation of coal by the flotation separation of coal particles from impurities associated therewith such as ash and sulfur. In this arrangement, a primary spray nozzle is positioned above a flotation tank having a water bath therein, and sprays an input slurry through an aeration zone into the surface of the water. The spraying operation creates a froth on the water surface in which a substantial quantity of particulate matter is floating, while other components of the slurry sink into the water bath. A skimming arrangement skims the froth from the water surface as a cleaned or beneficiated product. Moreover, a recycling operation is provided wherein particulate materials which do not float after being sprayed through the primary spray nozzle are recycled to a further recycle spray nozzle to provide a second opportunity for recovery of the recycled particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.