Process for selective grinding of coal

Patent · Tue Jan 01 00:00:00 EST 1991

OSTI ID:875280

Venkatachari, Mukund K. ^[1]; Benz, August D. ^[2]; Huettenhain, Horst ^[3]

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1. San Francisco, CA
2. Hillsborough, CA
3. Benicia, CA

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.

• Research Organization: Bechtel Corp., Homer City, PA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC22-87PC79867
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): H000981
• Application Number: 07/398576
• OSTI ID: 875280
• Resource Relation: Patent File Date: 1989 Aug 25
• Country of Publication: United States
• Language: English

Related Subjects

statutory invention registration
process
selective
grinding
coal
preparing
fuel
forming
coal-water
slurry
solid
particles
particle
size
exceeding
80
microns
transferring
bowl
centrifuge
operating
classify
ground
provide
centrate
containing
distribution
20
cake
solids
10
classifer
reground
mixed
fresh
feed
additional
classification
coal particle
water slurry
coal-water slurry
containing solid
size distribution
solid particles
particle size
coal particles
solid particle
fresh feed
/44/209/241/