Effect of Overflow Pipe on the Internal Flow Fields and Separation Performance of W-Shaped Hydrocyclones
The entrainment of fine particles in underflow of a grinding-classification hydrocyclone can cause ore overgrinding, which will lead to reductions in both metal recovery and ball mill throughput. To address this problem, this paper proposed a W-shaped hydrocyclone that can effectively reduce underfl...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-04-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/10/4/329 |
| _version_ | 1797571203671523328 |
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| author | Lanyue Jiang Peikun Liu Xinghua Yang Yuekan Zhang Xiaoyu Li Yulong Zhang Hui Wang |
| author_facet | Lanyue Jiang Peikun Liu Xinghua Yang Yuekan Zhang Xiaoyu Li Yulong Zhang Hui Wang |
| author_sort | Lanyue Jiang |
| collection | DOAJ |
| description | The entrainment of fine particles in underflow of a grinding-classification hydrocyclone can cause ore overgrinding, which will lead to reductions in both metal recovery and ball mill throughput. To address this problem, this paper proposed a W-shaped hydrocyclone that can effectively reduce underflow fine particle entrainment. Experimental tests and numerical simulations were employed to deeply investigate overflow pipe diameter influence on the separation performance and internal flow field of W-shaped hydrocyclones. The effects of overflow pipe diameter on air core shape, velocity field, pressure field, and separation performance were studied. The results revealed that as the diameter of the overflow pipe increased, air core gradually stabilized, and air core diameter gradually increased. The diameter of stabilized air core was approximately 45% to 55% of overflow pipe diameter. As overflow pipe diameter increased, hydrocyclone pressure drop decreased, energy consumption was reduced, the tangential velocity decreased, outer vortex axial velocity did not change significantly, and inner vortex axial velocity gradually increased. At the same time, zero-velocity points gradually moved outward, and the inner vortex region expanded. By the increase of overflow pipe diameter, both the underflow yield and split ratio gradually decreased, the coarse particle content in the overflow product increased, and the fine particle content in the underflow product gradually decreased. |
| first_indexed | 2024-03-10T20:37:00Z |
| format | Article |
| id | doaj.art-a265e223b01c4f2e80041f4188e923ea |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T20:37:00Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-a265e223b01c4f2e80041f4188e923ea2023-11-19T20:57:45ZengMDPI AGMinerals2075-163X2020-04-0110432910.3390/min10040329Effect of Overflow Pipe on the Internal Flow Fields and Separation Performance of W-Shaped HydrocyclonesLanyue Jiang0Peikun Liu1Xinghua Yang2Yuekan Zhang3Xiaoyu Li4Yulong Zhang5Hui Wang6College of Mechanical & Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mechanical & Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mechanical & Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mechanical & Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mechanical & Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mechanical & Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Mechanical & Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaThe entrainment of fine particles in underflow of a grinding-classification hydrocyclone can cause ore overgrinding, which will lead to reductions in both metal recovery and ball mill throughput. To address this problem, this paper proposed a W-shaped hydrocyclone that can effectively reduce underflow fine particle entrainment. Experimental tests and numerical simulations were employed to deeply investigate overflow pipe diameter influence on the separation performance and internal flow field of W-shaped hydrocyclones. The effects of overflow pipe diameter on air core shape, velocity field, pressure field, and separation performance were studied. The results revealed that as the diameter of the overflow pipe increased, air core gradually stabilized, and air core diameter gradually increased. The diameter of stabilized air core was approximately 45% to 55% of overflow pipe diameter. As overflow pipe diameter increased, hydrocyclone pressure drop decreased, energy consumption was reduced, the tangential velocity decreased, outer vortex axial velocity did not change significantly, and inner vortex axial velocity gradually increased. At the same time, zero-velocity points gradually moved outward, and the inner vortex region expanded. By the increase of overflow pipe diameter, both the underflow yield and split ratio gradually decreased, the coarse particle content in the overflow product increased, and the fine particle content in the underflow product gradually decreased.https://www.mdpi.com/2075-163X/10/4/329W-shaped hydrocycloneCFDexperimental studyflow fieldseparation performance |
| spellingShingle | Lanyue Jiang Peikun Liu Xinghua Yang Yuekan Zhang Xiaoyu Li Yulong Zhang Hui Wang Effect of Overflow Pipe on the Internal Flow Fields and Separation Performance of W-Shaped Hydrocyclones Minerals W-shaped hydrocyclone CFD experimental study flow field separation performance |
| title | Effect of Overflow Pipe on the Internal Flow Fields and Separation Performance of W-Shaped Hydrocyclones |
| title_full | Effect of Overflow Pipe on the Internal Flow Fields and Separation Performance of W-Shaped Hydrocyclones |
| title_fullStr | Effect of Overflow Pipe on the Internal Flow Fields and Separation Performance of W-Shaped Hydrocyclones |
| title_full_unstemmed | Effect of Overflow Pipe on the Internal Flow Fields and Separation Performance of W-Shaped Hydrocyclones |
| title_short | Effect of Overflow Pipe on the Internal Flow Fields and Separation Performance of W-Shaped Hydrocyclones |
| title_sort | effect of overflow pipe on the internal flow fields and separation performance of w shaped hydrocyclones |
| topic | W-shaped hydrocyclone CFD experimental study flow field separation performance |
| url | https://www.mdpi.com/2075-163X/10/4/329 |
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