Polydisperse coal slurry rheology. Quarterly report

Technical Report · Tue Jan 01 04:00:00 EST 1985

OSTI ID:6252201

Probstein, R F

In the previous quarter analyses of coal particle size distributions for a large number of coal-water slurries for which the particle sizes range from about 1 to 300 microns have shown the particle size distributions to be relatively sharply divided between a coarse fraction and a fine fraction when the fractions are based on particle number. The particle size dividing the two fractions was found to be about 6 microns and the ratio of coarse to fine volume fraction was found to be very close to 4 for all the slurries examined. The fine fraction is made up of particles which are affected by Brownian motion and have a colloidal behavior in contrast to the coarse fraction which is subjected to gravitational forces. In this reporting quarter work concentrated on determining the energy dissipation experienced by the coarse particles moving in a stiffened liquid made up of the carrier water and fine micron size particles. The slurry viscosity which is measured is proportional to the energy dissipation.

• Research Organization: Massachusetts Inst. of Tech., Cambridge (USA)
• DOE Contract Number: FG22-84PC70061
• OSTI ID: 6252201
• Report Number(s): DOE/PC/70061-2; ON: DE85007367
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600 -- Coal
Lignite
& Peat-- Properties & Composition
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
COAL FINES
DISPERSIONS
DISTRIBUTION
EQUATIONS
FUEL SLURRIES
FUELS
HYDROGEN COMPOUNDS
MIXTURES
OXYGEN COMPOUNDS
PARTICLE SIZE
QUANTITY RATIO
RESEARCH PROGRAMS
RHEOLOGY
SIZE
SLURRIES
SUSPENSIONS
VISCOSITY
WATER