Grinding Media Motion and Collisions in Different Zones of Stirred Media Mills
Product fineness during grinding in stirred media mills is mainly influenced by the specific energy input, the stress energy transferred by the colliding grinding media and the stress frequency. The stress energy from grinding media collisions is heterogeneously distributed in stirred media mills. H...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/11/2/185 |
| _version_ | 1797411444170424320 |
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| author | Greta Fragnière Aleksandra Naumann Marcel Schrader Arno Kwade Carsten Schilde |
| author_facet | Greta Fragnière Aleksandra Naumann Marcel Schrader Arno Kwade Carsten Schilde |
| author_sort | Greta Fragnière |
| collection | DOAJ |
| description | Product fineness during grinding in stirred media mills is mainly influenced by the specific energy input, the stress energy transferred by the colliding grinding media and the stress frequency. The stress energy from grinding media collisions is heterogeneously distributed in stirred media mills. Herein, in order to characterize the stress energy distribution and the local grinding media collision frequencies, the grinding media motion was calculated using discrete element method (DEM) simulations coupled with computational fluid dynamics (CFD). The local grinding media concentration, velocity profiles, grinding media collisions and stress energies were compared for varied total grinding media fillings and stirrer speeds. It was confirmed that the normalized grinding media velocity profile can be used to divide the grinding chamber into four types of zones that allow the modeling of the stress energy distribution. However, the collision frequency showed very different distributions for varied stirrer velocities and grinding media fillings. |
| first_indexed | 2024-03-09T04:45:10Z |
| format | Article |
| id | doaj.art-9a492f5b6c6243829988408393e74216 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T04:45:10Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-9a492f5b6c6243829988408393e742162023-12-03T13:16:11ZengMDPI AGMinerals2075-163X2021-02-0111218510.3390/min11020185Grinding Media Motion and Collisions in Different Zones of Stirred Media MillsGreta Fragnière0Aleksandra Naumann1Marcel Schrader2Arno Kwade3Carsten Schilde4Institute for Particle Technology, Technische Universität Braunschweig, 38104 Braunschweig, GermanyInstitute for Particle Technology, Technische Universität Braunschweig, 38104 Braunschweig, GermanyInstitute for Particle Technology, Technische Universität Braunschweig, 38104 Braunschweig, GermanyInstitute for Particle Technology, Technische Universität Braunschweig, 38104 Braunschweig, GermanyInstitute for Particle Technology, Technische Universität Braunschweig, 38104 Braunschweig, GermanyProduct fineness during grinding in stirred media mills is mainly influenced by the specific energy input, the stress energy transferred by the colliding grinding media and the stress frequency. The stress energy from grinding media collisions is heterogeneously distributed in stirred media mills. Herein, in order to characterize the stress energy distribution and the local grinding media collision frequencies, the grinding media motion was calculated using discrete element method (DEM) simulations coupled with computational fluid dynamics (CFD). The local grinding media concentration, velocity profiles, grinding media collisions and stress energies were compared for varied total grinding media fillings and stirrer speeds. It was confirmed that the normalized grinding media velocity profile can be used to divide the grinding chamber into four types of zones that allow the modeling of the stress energy distribution. However, the collision frequency showed very different distributions for varied stirrer velocities and grinding media fillings.https://www.mdpi.com/2075-163X/11/2/185discrete element methodstress energy modelcomminutionfine grindingstirred media mill |
| spellingShingle | Greta Fragnière Aleksandra Naumann Marcel Schrader Arno Kwade Carsten Schilde Grinding Media Motion and Collisions in Different Zones of Stirred Media Mills Minerals discrete element method stress energy model comminution fine grinding stirred media mill |
| title | Grinding Media Motion and Collisions in Different Zones of Stirred Media Mills |
| title_full | Grinding Media Motion and Collisions in Different Zones of Stirred Media Mills |
| title_fullStr | Grinding Media Motion and Collisions in Different Zones of Stirred Media Mills |
| title_full_unstemmed | Grinding Media Motion and Collisions in Different Zones of Stirred Media Mills |
| title_short | Grinding Media Motion and Collisions in Different Zones of Stirred Media Mills |
| title_sort | grinding media motion and collisions in different zones of stirred media mills |
| topic | discrete element method stress energy model comminution fine grinding stirred media mill |
| url | https://www.mdpi.com/2075-163X/11/2/185 |
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