Process for cleaning and dewatering fine coal

Details Process for cleaning and dewatering fine coal Process for cleaning and dewatering fine coal

1977-03-24

1978-12-05

Cuchlinski, Jr., William A.

Classifying, separating, and assorting solids

Special applications

B03B 548

Patent

active

041284747

ABSTRACT:
A wet mechanical process is described for cleaning, upgrading and dewatering fine coal. The process provides for forming an aqueous feed slurry of fine coal and its associated contaminant particles wherein all particles have a particle portion size of less than about 6 mm. ranging to zero. The feed slurry is separated into coal slurry and refuse slurry portions in a spiral gravity concentrator by removing contaminants having a particle size greater than about 0.15 mm. The concentrated coal slurry is then fed to a hydrocyclone separator where all of the ultra-fine silt material having a particle size of less than 0.15 mm. is removed and the coal particle fraction 6 mm. to 0.15 mm. is accumulated and thoroughly dewatered.

REFERENCES:
patent: 2431560 (1947-11-01), Humphreys
patent: 3923210 (1975-12-01), Jackson
patent: 3926787 (1975-12-01), Gay
patent: 3929642 (1975-12-01), Ennis et al.
patent: 3970549 (1976-07-01), Ennis et al.
Thompson et al.; "The Humphreys Spiral--Some Present and Potential Applications"; Aug., 1950; Engineering and Mining Journal; pp. 87-89.

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