Coal beneficiation processes
US4252639A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1979 |
| Grant date | Feb 24, 1981 |
| Priority date | — |
| Expiry date | Nov 5, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03B1/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of beneficiating coal in which the coal is conditioned by agitating it in the presence of a dense halogenated hydrocarbon and a surface active agent to effect a transfer of surface water from the coal to mineral matter associated therewith and an agglomeration of the mineral matter and to envelop the coal in a film of the surface active agent. The conditioned coal is then introduced into a halogenated hydrocarbon bath having a specific gravity intermediate those of the coal and the mineral matter. The agglomerated mineral matter sinks to the bottom of the bath in the region of feedstock introduction, and the coal disperses in and migrates to the top of the bath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.