Compressibility of particulate structures in relation to thickening, filtration, and expression - a review
Conference
·
· Sep. Sci. Technol.; (United States)
OSTI ID:6295899
Compressibility of cakes is basic to separation of solids from slurries. Cake compression is caused by collapsing, particulate structures in which particles are forced into existing voids. Stresses causing the collapse arise from unbuoyed weight of solids in thickeners, radial acceleration in centrifuges, frictional pressure drop in filters, and mechanical forces in press belts and membrane actuated filters. Compressibility is a function of particle size and shape and the degree of aggregation. Flow through very compressible cakes produces a highly non-uniform structure with a tight skin of low porosity next to the supporting medium. This skin leads to adverse effects in which increasing filter pressure has little effect on flow rate or average porosity. Similarly increasing the squeezing pressure indefinitely in expression has little effect upon the rate of removal of liquid.
- Research Organization:
- Univ. of Houston, TX
- DOE Contract Number:
- AS05-81ER10946
- OSTI ID:
- 6295899
- Report Number(s):
- CONF-851011-
- Conference Information:
- Journal Name: Sep. Sci. Technol.; (United States) Journal Volume: 22:2/3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
COMPRESSIBILITY
DIMENSIONS
DISPERSIONS
DOCUMENT TYPES
FILTERS
FILTRATION
FLOW RATE
FLUID FLOW
MECHANICAL PROPERTIES
MIXTURES
PARTICLES
PARTICULATES
POROSITY
PRESSURE DROP
REVIEWS
SEPARATION PROCESSES
SLURRIES
SUSPENSIONS
THICKNESS
400105* -- Separation Procedures
COMPRESSIBILITY
DIMENSIONS
DISPERSIONS
DOCUMENT TYPES
FILTERS
FILTRATION
FLOW RATE
FLUID FLOW
MECHANICAL PROPERTIES
MIXTURES
PARTICLES
PARTICULATES
POROSITY
PRESSURE DROP
REVIEWS
SEPARATION PROCESSES
SLURRIES
SUSPENSIONS
THICKNESS