Process for preparing a clean coal-water slurry
A process for providing a clean coal-water slurry, which contains from 60-80 volume percent of coal and has a relatively low viscosity, is provided. In one embodiment of this process, a coal-water mixture which contains 60-80 volume percent of solid material is ground until a slurry whose particle size distribution is in accordance with a specified CPFT formula is produced, and the coal is cleaned; in this embodiment, the coal is cleaned either by cleaning the coal-water mixture before grinding it, or by cleaning the coal-water slurry. In another embodiment of this process, a coal-water mixture is blended with at least one additional coal fraction (such as coal, coal-water mixture, or mixtures thereof) until a slurry is produced which contains 60-80 percent of solids and which has the aforementioned particle size distribution; and the coal is cleaned; in this embodiment, it is preferred to clean the coal by cleaning the coal-water slurry.
- Assignee:
- Alfred University Research Foundation Inc.
- Patent Number(s):
- US 4468232
- OSTI ID:
- 6187792
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
CARBONACEOUS MATERIALS
COAL
COAL PREPARATION
DISPERSIONS
DISTRIBUTION
ENERGY SOURCES
FOSSIL FUELS
FUEL SLURRIES
FUELS
HYDROGEN COMPOUNDS
MATERIALS
MIXTURES
OXYGEN COMPOUNDS
PARTICLE SIZE
PRODUCTION
QUANTITY RATIO
SIZE
SLURRIES
SUSPENSIONS
VISCOSITY
WATER