Continuous ultra-fine classification in a disc-stack nozzle centrifuge — effects of G-forces and disc geometry--颗粒学报PARTICUOLOGY

Wang, Y., Forssberg, E., Li, J., & Pan, Z. (2003). Continuous ultra-fine classification in a disc-stack nozzle centrifuge — effects of G-forces and disc geometry. China Particuology, 1(2), 70-75. https://doi.org/10.1016/S1672-2515(07)60111-0

Continuous ultra-fine classification in a disc-stack nozzle centrifuge — effects of G-forces and disc geometry

Yanmin Wang ^{a b *}, Eric Forssberg ^a, Jingxian Li ^b, Zhidong Pan ^b

a Department of Chemical & Metallurgical Engineering, Luleå University of Technology, S-971 87, Luleå, Sweden
b Division of Powder & Particle Technology, Institute of Material Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China

10.1016/S1672-2515(07)60111-0

Volume 1, Issue 2, June 2003, Pages 70-75

Received 7 March 2003, Accepted 20 March 2003, Available online 27 November 2007.

E-mail: wangym@scut.edu.cn

Highlights

Abstract

This paper describes the use of a disc-stack nozzle centrifuge for wet classification of ultra-fine particles of calcium carbonate. The influences of G-force and disc geometry on the performance of the ultra-fine classification have been investigated. The results have demonstrated that the efficiency of the classification can be increased by (1) applying a relatively moderate G-force and (2) the use of stud spacer discs in the centrifuge. The increased extraction of the fine particles is related to the formation of the appropriate fluid velocity profile at a lower G-force and a circumferential motion without meridional barriers for the case of the stud spacer discs.

Graphical abstract

Keywords

centrifuge; classification; separation; ultra-fines; calcium carbonate

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