Mathematical modeling of mass transfer during centrifugal filtration of polydisperse suspensions

A mass-transfer equation, the solution of which for given boundary conditions makes it possible to derive in analytical form a relationship between the extraction of the solid phase of a suspension into the centrifuge effluent and the fineness of the particles, is suggested on the basis of a model;...

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Bibliographic Details
Published in:Chemical and petroleum engineering 2009-07, Vol.45 (7-8), p.460-467
Main Authors: Pozhidaev, V. F., Rubinshtein, Yu. B., Golberg, G. Yu, Osadchii, S. A.
Format: Article
Language:English
Subjects:
01 COAL, LIGNITE, AND PEAT
ASH CONTENT
Ashes
Centrifugal filtration
CENTRIFUGES
Chemistry
Chemistry and Materials Science
COAL
Effluents
Extraction
Filtering
FILTRATION
FUEL SLURRIES
Geotechnical Engineering & Applied Earth Sciences
Industrial Chemistry/Chemical Engineering
Industrial Pollution Prevention
MASS TRANSFER
Mathematical analysis
MATHEMATICAL MODELS
Mineral Resources
PARTICLE SIZE
SEPARATION PROCESSES
SUSPENSIONS
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Summary:A mass-transfer equation, the solution of which for given boundary conditions makes it possible to derive in analytical form a relationship between the extraction of the solid phase of a suspension into the centrifuge effluent and the fineness of the particles, is suggested on the basis of a model; this is of particular importance in connection with the development of a new trend in the utilization of filtering centrifuges – concentration of coal slurries by extraction into the centrifuge effluent of the finest particles, the ash content of which is substantially higher than that of particles of the coarser classes. Results are presented for production studies under conditions at an active establishment (the Neryungrinskaya Enrichment Factory); these results confirmed the adequacy of the mathematical model proposed: convergence of computed and experimental data was within the limits of the experimental error (no more than 3%). The model in question can be used to predict results of suspension separation by centrifugal filtration.
ISSN:0009-2355
1573-8329
DOI:10.1007/s10556-009-9210-3