Coal-water fuel production
US4915706A · kind A · utility
11Cited by
6References
22Claims
0Family size
Inventors
Key dates
| Filing date | Mar 3, 1987 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Mar 3, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03D1/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process and apparatus for producing coal-water fuel comprises crushing and primary grinding of the coal to form a liberated granular material, multiple stage froth flotation of the granulated coal to reduce its ash content and pyritic sulfur content. The resulting product from the froth flotation operations is dewatered to yield a product having a selected solids content. A stable slurry is then produced from the product by establishing a selected particle size distribution. Refuse accumulated from the various previous steps is collected, dewatered and the water is clarified for use in the process steps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.