Method for processing raw coal

Details Method for processing raw coal Method for processing raw coal

1978-02-02

1979-01-09

Lutter, Frank W.

Classifying, separating, and assorting solids

Treatment subsequent

209 5, 209 17, B03B 900

Patent

active

041337476

ABSTRACT:
A method and apparatus for beneficiating crushed raw coal comprising: cleaning the crushed coal in bulk in cyclone separators using only water as a cleaning medium and obtaining a product of wet clean coal and wet reject material and also a stream of effluent; drying said wet clean coal and wet reject material by agglomerating after the addition of a small amount of oil and then centrifuging to obtain a product of clean dry coal and solid reject material and also a stream of effluent; treating the effluent stream from the cleaning step and the effluent stream from the drying step by means of flocculation to recover a product of coal and reject sludge which is returned to pass through the drying step again; and thus obtain clean water which is recycled and applied to the input of the cyclones in the cleaning step.

REFERENCES:
patent: RE26720 (1969-11-01), Visman
patent: 2724503 (1955-11-01), Fontein
patent: 3045818 (1962-07-01), Muschenborn et al.
patent: 3366247 (1968-01-01), Visman
patent: 3408293 (1968-10-01), Dajani et al.
patent: 3487923 (1970-01-01), Visman et al.
patent: 3856668 (1974-12-01), Shubert

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