Method and apparatus for beneficiating coal
US4323449A · kind A · utility
6Cited by
5References
11Claims
0Family size
Inventor
Key dates
| Filing date | Nov 14, 1980 |
| Grant date | Apr 6, 1982 |
| Priority date | — |
| Expiry date | Nov 14, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03B5/42
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and apparatus for beneficiating a mixture of coal and a denser material are provided. The coal and ash mixture and a liquid medium are deposited into a rotating, sloping barrel having internal spiral flights and foraminous end sections. Coal and medium travel downwardly and the denser material is screwed upwardly. The positions of deposit of the mixture and the medium are adjustable, as are the rates of rotation of the barrel and the angle of the barrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.