Process for selective grinding of coal

Details Process for selective grinding of coal Process for selective grinding of coal

1989-08-25

1991-11-05

Hunt, Brooks H.

Fuel and related compositions

Solid carbonaceous fuel dispersed in a liquid medium

The liquid medium is, or contains, hydrocarbon

44500, 209172, 2091725, 241 16, 241 20, C10L 132

Patent

active

H00009814

ABSTRACT:
A process for preparing coal for use as a fuel. Forming a coal-water slurry having solid coal particles with a particle size not exceeding about 80 microns, transferring the coal-water slurry to a solid bowl centrifuge, and operating same to classify the ground coal-water slurry to provide a centrate containing solid particles with a particle size distribution of from about 5 microns to about 20 microns and a centrifuge cake of solids having a particle size distribution of from about 10 microns to about 80 microns. The classifer cake is reground and mixed with fresh feed to the solid bowl centrifuge for additional classification.

REFERENCES:
patent: 4173530 (1979-11-01), Smith et al.
patent: 4244699 (1981-01-01), Smith et al.
patent: 4405453 (1983-09-01), Wells
patent: 4500041 (1985-02-01), Nakaoji et al.
patent: 4522626 (1985-06-01), Epsenscheid
patent: 4533464 (1985-08-01), Smith et al.

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