Method for passivating particulate coal

Details Method for passivating particulate coal Method for passivating particulate coal

1988-02-29

1991-07-23

Medley, Margaret B.

Fuel and related compositions

Particulate

Solid particle containing liquid fuel

44505, 44545, 44608, 44628, 34 10, C10L 500

Patent

active

050332309

ABSTRACT:
A method is disclosed for drying and passivating wet coals, for example bituminous, subbituminous or lignite. The wet coal is introduced into a heating zone at a controlled rate, then is contacted with a heavy hydrocarbonaceous treatment material having a softening point of at least 60.degree. C. The particles and treatment material are simultaneously intimately mixed and are heated to a temperature of at least 200.degree. C. but below the coal decomposition temperature while being moved along the heating zone in a plug flow manner. The particles are then cooled in a cooling zone.

REFERENCES:
patent: 2590733 (1952-03-01), Stillman
patent: 2610115 (1952-09-01), Lykken
patent: 2811427 (1957-10-01), Lykken
patent: 3957456 (1976-05-01), Verschuur
patent: 3961914 (1976-06-01), Kindig et al.
patent: 3985516 (1976-10-01), Johnson et al.
patent: 3985517 (1976-10-01), Johnson
patent: 4214875 (1980-07-01), Kromery
patent: 4397653 (1983-08-01), Loganbach
patent: 4461624 (1984-07-01), Wong
patent: 4481011 (1984-11-01), Weskamp et al.

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