Fluidization Analysis of Thickening in the Deep Cone for Cemented Paste Backfill
Cemented paste backfill (CPB) can effectively eliminate the risk of dam break in goaf and tailings pond which used tailings waste. Deep cone thickener (DCT) is an efficient machine for the system of paste preparation, and the concentration of slurry at the bottom is high and distributed unevenly, wh...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/6285981 |
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| author | Haiyong Cheng Jin Liu Shunchuan Wu Xiaoqiang Zhang |
| author_facet | Haiyong Cheng Jin Liu Shunchuan Wu Xiaoqiang Zhang |
| author_sort | Haiyong Cheng |
| collection | DOAJ |
| description | Cemented paste backfill (CPB) can effectively eliminate the risk of dam break in goaf and tailings pond which used tailings waste. Deep cone thickener (DCT) is an efficient machine for the system of paste preparation, and the concentration of slurry at the bottom is high and distributed unevenly, which will cause too much partial resistance and failure of thickener. Focusing on the above problems, fluidization design was conducted by using the fluidization theory. The delivery law of flocs was analyzed, and the isobaric surface was obtained. The equation of pressure and critical velocity of the ideal fluidized bed was acquired by analyzing the relationship between pressure and critical velocity. Based on the characteristics of tailings and distribution of the bonding zone, the arrangement, number, and working mode of spray nozzles were reformed. It is verified that the failure time of thickener decreased from 14 hours to 1 hour and the range of concentration increased from 74%∼78% to 78%∼80%, which improved the stability and reliability of DCT. The depth thickening mechanism is obtained, and the thickening method has been improved which provides a theoretical basis for the effective preparation of paste. |
| format | Article |
| id | doaj-art-701227648dea44d5ac8dd611509b91ee |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-701227648dea44d5ac8dd611509b91ee2025-02-03T01:27:55ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/62859816285981Fluidization Analysis of Thickening in the Deep Cone for Cemented Paste BackfillHaiyong Cheng0Jin Liu1Shunchuan Wu2Xiaoqiang Zhang3Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaFaculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaFaculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaFaculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaCemented paste backfill (CPB) can effectively eliminate the risk of dam break in goaf and tailings pond which used tailings waste. Deep cone thickener (DCT) is an efficient machine for the system of paste preparation, and the concentration of slurry at the bottom is high and distributed unevenly, which will cause too much partial resistance and failure of thickener. Focusing on the above problems, fluidization design was conducted by using the fluidization theory. The delivery law of flocs was analyzed, and the isobaric surface was obtained. The equation of pressure and critical velocity of the ideal fluidized bed was acquired by analyzing the relationship between pressure and critical velocity. Based on the characteristics of tailings and distribution of the bonding zone, the arrangement, number, and working mode of spray nozzles were reformed. It is verified that the failure time of thickener decreased from 14 hours to 1 hour and the range of concentration increased from 74%∼78% to 78%∼80%, which improved the stability and reliability of DCT. The depth thickening mechanism is obtained, and the thickening method has been improved which provides a theoretical basis for the effective preparation of paste.http://dx.doi.org/10.1155/2020/6285981 |
| spellingShingle | Haiyong Cheng Jin Liu Shunchuan Wu Xiaoqiang Zhang Fluidization Analysis of Thickening in the Deep Cone for Cemented Paste Backfill Advances in Materials Science and Engineering |
| title | Fluidization Analysis of Thickening in the Deep Cone for Cemented Paste Backfill |
| title_full | Fluidization Analysis of Thickening in the Deep Cone for Cemented Paste Backfill |
| title_fullStr | Fluidization Analysis of Thickening in the Deep Cone for Cemented Paste Backfill |
| title_full_unstemmed | Fluidization Analysis of Thickening in the Deep Cone for Cemented Paste Backfill |
| title_short | Fluidization Analysis of Thickening in the Deep Cone for Cemented Paste Backfill |
| title_sort | fluidization analysis of thickening in the deep cone for cemented paste backfill |
| url | http://dx.doi.org/10.1155/2020/6285981 |
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