Preparation of deashed high solid concentration coal-water slurry
US4593859A · kind A · utility
9Cited by
1References
4Claims
0Family size
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Key dates
| Filing date | May 17, 1984 |
| Grant date | Jun 10, 1986 |
| Priority date | — |
| Expiry date | May 17, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L1/326
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This process, which comprises subjecting coal to gravity classification to classify into a low ash coal, a middle ash coal and a high ash coal; deashing the middle ash coal by flotation; and using the deashed middle ash coal together with the low ash coal as the materials for producing a coal-water slurry, provides a low ash content and high solid content coal-water slurry in a high coal recovery as well as economically. This coal-water slurry is able to handle, store and burn as are fuel oils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.