Coal drying and passivation process. [14 claims]
Patent
·
OSTI ID:7233406
Low rank coals such as subbituminous or lignites containing more than about 10 wt. percent moisture are first dried and then passed to a fluidized bed where the coal is passivated against reabsorption of moisture by coating the warm coal particles with a heavy liquid hydrocarbon material. Such coating substantially prevents the reabsorption of moisture in the coal, and thereby prevents autogenous heating and possible spontaneous ignition during subsequent transportation or storage of the passivated coal.
- Assignee:
- Hydrocarbon Research, Inc.
- Patent Number(s):
- US 3985516
- OSTI ID:
- 7233406
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
BROWN COAL
CARBONACEOUS MATERIALS
COAL
COAL PREPARATION
COAL RANK
COMMINUTION
DRYING
ENERGY SOURCES
FLUIDIZED BED
FLUIDS
FOSSIL FUELS
FUELS
HYDROCARBONS
LIGNITE
LIQUIDS
MOISTURE
ORGANIC COMPOUNDS
REMOVAL
SUBBITUMINOUS COAL
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
BROWN COAL
CARBONACEOUS MATERIALS
COAL
COAL PREPARATION
COAL RANK
COMMINUTION
DRYING
ENERGY SOURCES
FLUIDIZED BED
FLUIDS
FOSSIL FUELS
FUELS
HYDROCARBONS
LIGNITE
LIQUIDS
MOISTURE
ORGANIC COMPOUNDS
REMOVAL
SUBBITUMINOUS COAL