Coal passivation process. [11 claims]
Patent
·
OSTI ID:7320684
Low rank coals such as subbituminous or lignites containing more than about 10 percent moisture are dried and passivated against reabsorption of moisture in a fluidized bed by heating the particulate coal with a warm inert gas passing upwardly through the bed and simultaneously coating the warm particulate coal with a heavy liquid hydrocarbon material. Such coating aids in the removal of the moisture and prevents the reabsorption of moisture by the coal and thereby prevents consequential heating and possibly spontaneous ignition of the coal during its subsequent transportation or storage.
- Assignee:
- Hydrocarbon Research, Inc.
- Patent Number(s):
- US 3985517
- OSTI ID:
- 7320684
- Country of Publication:
- United States
- Language:
- English
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