| CONTINUOUS ULTRA—FINE CLASSIFICATION IN A DISC—STACK NOZZLE CENTRIFUGEEFFECTS OF G—FORCES AND DISC GEOMETRY |
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| 作者姓名： | YanminWang EricForssberg JingxianLi ZhidongPan |
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| 作者单位： | Yanmin Wang，Eric Forssberg，Jingxian Li and Zhidong Pan
Department of Chemical & Metallurgical Engineering，Lulea University of Technology，S-97187，Lulea，Sweden Division of Powder & Particle Technology，Institute of Material Science and Engineering，South China University of Technology，Guangzhou 510640，P. R. China Author to whom correspondence should be addressed. E-mail: wangym@scut.edu.cn |
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| 摘 要： | 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.
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| 关 键 词： | 离心机 分类 分离 超精细粒子 碳酸钙 |
| 收稿时间： | 7 March 2003 |
CONTINUOUS ULTRA-FINE CLASSIFICATION IN A DISC-STACK NOZZLE CENTRIFUGE EFFECTS OF G-FORCES AND DISC GEOMETRY |
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| YanminWang EricForssberg JingxianLi ZhidongPan.CONTINUOUS ULTRA-FINE CLASSIFICATION IN A DISC-STACK NOZZLE CENTRIFUGE EFFECTS OF G-FORCES AND DISC GEOMETRY[J].China Particuology,2003,1(2):70-75. |
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| Authors: | Yanmin Wang Eric Forssberg Jingxian Li Zhidong Pan |
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| Institution: | 1. Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UK;2. Department of Biochemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK |
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| 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. |
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| Keywords: | centrifuge classification separation ultra-fines calcium carbonate |
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