Process for selective grinding of coal

Patent Application · Fri Aug 25 00:00:00 EDT 1989

OSTI ID:5902630

Venkatachari, M K; Benz, A D; Huettenhain, H

A process for preparing coal for use as a fuel is described. The process relates to 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 classifier cake is reground and mixed with fresh feed to the solid bowl centrifuge for additional classification. 1 fig., 5 tabs.

• Research Organization: Bechtel Corp., Homer City, PA (USA)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC22-87PC79867
• Assignee: Dept. of Energy
• Patent Number(s): PATENTS-US-A7398576
• Application Number: ON: DE91011622; PPN: US 7-398576
• OSTI ID: 5902630
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
COMMINUTION
DEASHING
DESULFURIZATION
FUEL SLURRIES
SYNTHESIS
CENTRIFUGATION
COAL FINES
COAL PREPARATION
DISTRIBUTION
FLOWSHEETS
PARTICLE SIZE
RECYCLING
REMOVAL
SORTING
WATER
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
DIAGRAMS
DISPERSIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
MATERIALS
MIXTURES
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SIZE
SLURRIES
SUSPENSIONS
010300* - Coal
Lignite
& Peat- Preparation- (1987-)