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Dead‐End Dynamic Filtration of Highly Concentrated CaCO 3 Suspensions in the Presence of a Dispersant
Author(s) -
Loginov M.,
Lebovka N.,
Larue O.,
Ding L. H.,
Vorobiev E.
Publication year - 2010
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201000073
Subject(s) - dispersant , dewatering , filtration (mathematics) , sodium polyacrylate , materials science , pulp and paper industry , chromatography , chemistry , waste management , composite material , dispersion (optics) , geotechnical engineering , engineering , mathematics , organic chemistry , raw material , statistics , physics , optics
This work discusses dewatering of CaCO 3 suspensions in the presence of a dispersant (sodium polyacrylate). Suspensions were dewatered using the rotating disk‐aided dead‐end dynamic filtration technique. Dewatering efficiency was studied as a function of the dispersant content and operational parameters (disk rotation speed, filtration pressure). Two dewatering modes, with initial ( i ‐dewatering) and delayed ( d ‐dewatering) dispersant addition, were tested. For concentrated suspensions, the d ‐dewatering allowed higher final dryness and better fluidity than i ‐dewatering with minimum dispersant losses in the filtrate.