Classifying – separating – and assorting solids – Precedent preparation of items or materials to facilitate... – Sorting special items or sorting by methods and apparatus...
Patent
1987-12-11
1989-12-19
Lacey, David L.
Classifying, separating, and assorting solids
Precedent preparation of items or materials to facilitate...
Sorting special items or sorting by methods and apparatus...
209 11, 209 5, 241 23, 241 24, B03B 102, B04C 700, B07B 900
Patent
active
048877220
ABSTRACT:
A method for beneficiating a coal refuse feed stream which includes agglomerated carbonaceous and clay particles. The feed stream is rapidly heated to volatilize moisture. Heating is carried out in a manner to produce abrasive commutation and sub-divide particles by volatilizing the moisture. After deagglomerating the feed stream, the discreet particles essentially consisting of carbonaceous particles and clay particles are separated to form a plurality of differently sized classifications of granular particles. A carbonaceous particle fraction essentially comprised of granular particles having a particle size greater than about 2 microns is recovered to form one fraction and a minus 2 micron fraction is classified to separate particles from the component gas. In one embodiment, a dust laden gas fraction is treated in an air classifier to form a coarse particle fraction and a fine particle fraction. The recovered coarse particle fraction can be used as a carbonaceous fuel.
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Lacey David L.
Lithgow Thomas M.
Poff Clifford A.
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