Particle Attrition in Small Clearances
Attrition is commonly found in the clearances of equipment where a mechanical device moves relative to a wall. Particles are trapped and broken in these regions, hence promoting attrition. This work concerns a cell where a blade rotates parall...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Hosokawa Powder Technology Foundation
2014-05-01
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| Series: | KONA Powder and Particle Journal |
| Online Access: | https://www.jstage.jst.go.jp/article/kona/15/0/15_1997007/_pdf/-char/en |
| _version_ | 1818912235640061952 |
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| author | C.C. Crutchley J. Bridgwater |
| author_facet | C.C. Crutchley J. Bridgwater |
| author_sort | C.C. Crutchley |
| collection | DOAJ |
| description | Attrition is commonly found in the clearances of equipment where a mechanical device moves relative to a wall. Particles are trapped and broken in these regions, hence promoting attrition. This work concerns a cell where a blade rotates parallel to a wall. A cone cell design allowed for various gap sizes, particle velocities and blade tip speeds. The breakage rate of particles changed dramatically with gap size. Breakage commenced at a gap size close to a half particle diameter but had a definite minimum between one and one-and-half particle diameters. Little breakage was experienced if the gap much exceeded two particle diameters. When the other conditions of cell are changed, firstly the blade speed and secondly the flow rate of particles through the cell, the effect of gap size on breakage pattern is not changed. The product size distribution can be quite complex and is not simply related to the gap size. Segregation and a changed packing structure may each influence the breakage of a mixture. |
| first_indexed | 2024-12-19T23:11:22Z |
| format | Article |
| id | doaj.art-2466f936d0c3452f858dd3ea12477fa1 |
| institution | Directory Open Access Journal |
| issn | 0288-4534 2187-5537 |
| language | English |
| last_indexed | 2024-12-19T23:11:22Z |
| publishDate | 2014-05-01 |
| publisher | Hosokawa Powder Technology Foundation |
| record_format | Article |
| series | KONA Powder and Particle Journal |
| spelling | doaj.art-2466f936d0c3452f858dd3ea12477fa12022-12-21T20:02:13ZengHosokawa Powder Technology FoundationKONA Powder and Particle Journal0288-45342187-55372014-05-01150213110.14356/kona.1997007konaParticle Attrition in Small ClearancesC.C. Crutchley0J. Bridgwater1Department of Chemical Engineering, University of BirminghamDepartment of Chemical Engineering, University of CambridgeAttrition is commonly found in the clearances of equipment where a mechanical device moves relative to a wall. Particles are trapped and broken in these regions, hence promoting attrition. This work concerns a cell where a blade rotates parallel to a wall. A cone cell design allowed for various gap sizes, particle velocities and blade tip speeds. The breakage rate of particles changed dramatically with gap size. Breakage commenced at a gap size close to a half particle diameter but had a definite minimum between one and one-and-half particle diameters. Little breakage was experienced if the gap much exceeded two particle diameters. When the other conditions of cell are changed, firstly the blade speed and secondly the flow rate of particles through the cell, the effect of gap size on breakage pattern is not changed. The product size distribution can be quite complex and is not simply related to the gap size. Segregation and a changed packing structure may each influence the breakage of a mixture.https://www.jstage.jst.go.jp/article/kona/15/0/15_1997007/_pdf/-char/en |
| spellingShingle | C.C. Crutchley J. Bridgwater Particle Attrition in Small Clearances KONA Powder and Particle Journal |
| title | Particle Attrition in Small Clearances |
| title_full | Particle Attrition in Small Clearances |
| title_fullStr | Particle Attrition in Small Clearances |
| title_full_unstemmed | Particle Attrition in Small Clearances |
| title_short | Particle Attrition in Small Clearances |
| title_sort | particle attrition in small clearances |
| url | https://www.jstage.jst.go.jp/article/kona/15/0/15_1997007/_pdf/-char/en |
| work_keys_str_mv | AT cccrutchley particleattritioninsmallclearances AT jbridgwater particleattritioninsmallclearances |