Analysis of Sedimentation and Settling Process of Dense Alumina Slurries by Hydrostatic Pressure Measurement

Autor:	Masanori Miyazawa, Ikue Inamine, Kiyohito Kuno, JunIchiro Tsubaki
Rok vydání:	2003
Předmět:	Fluid Flow and Transfer Processes Flocculation Sedimentation (water treatment) Chemistry Process Chemistry and Technology Hydrostatic pressure Mineralogy Filtration and Separation Apparent viscosity Catalysis Settling Chemical engineering Compressibility Slurry DLVO theory
Zdroj:	Journal of the Society of Powder Technology, Japan. 40:432-437
ISSN:	1883-7239 0386-6157
Popis:	A new evaluation technique has been developed for the characterization of slurry compressibility by hydrostatic pressure measurement. Slurry was poured into a test tube, and the change in hydrostatic pressure at the bottom was measured during the gravitational sedimentation. In order to investigate the effect of flocculation degree on the sedimentation behavior, pH values were changed using hydrochloric acid. It was found that the hydrostatic pressure of strongly flocculated slurry decreased faster than that of well-dispersed slurry. It was also shown that the hydrostatic pressure of weakly flocculated slurry decreased like well-dispersed slurry at initial stage of sedimentation, however it decreased rapidly after a certain time. This result suggests that the flocculation proceeded during the sedimentation for the weakly flocculated slurry. The results obtained from the hydrostatic pressure measurement were found to agree well with DLVO theory.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8772a93ae3d124e448ce03aab6b8eae3 https://doi.org/10.4164/sptj.40.432 Zobrazit plný text záznamu