Effect of variations in the polar and azimuthal angles of coarse particles on the structure of drainage channels in thickened beds

Cuiping Li; Gezhong Chen; Zhu’en Ruan; Raimund Bürger; Yuan Gao; Hezi Hou; Hui Wang

doi:10.1007/s12613-023-2680-z

Volume 30 Issue 12

Dec. 2023

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2023 > 30(12): 2321-2333

Cuiping Li, Gezhong Chen, Zhu’en Ruan, Raimund Bürger, Yuan Gao, Hezi Hou, and Hui Wang, Effect of variations in the polar and azimuthal angles of coarse particles on the structure of drainage channels in thickened beds, Int. J. Miner. Metall. Mater., 30(2023), No. 12, pp. 2321-2333. https://doi.org/10.1007/s12613-023-2680-z

Cite this article as:

Cuiping Li, Gezhong Chen, Zhu’en Ruan, Raimund Bürger, Yuan Gao, Hezi Hou, and Hui Wang, Effect of variations in the polar and azimuthal angles of coarse particles on the structure of drainage channels in thickened beds, Int. J. Miner. Metall. Mater., 30(2023), No. 12, pp. 2321-2333. https://doi.org/10.1007/s12613-023-2680-z

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Research Article

Effect of variations in the polar and azimuthal angles of coarse particles on the structure of drainage channels in thickened beds

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Corresponding author:
Zhu’en Ruan E-mail: ustb_ruanzhuen@hotmail.com
Received: 19 November 2022; Revised: 23 April 2023; Accepted: 17 May 2023; Available online: 20 May 2023

Abstract

Abstract

The 3D reconstruction and quantitative characterization of drainage channels and coarse tailings particles in a bed were conducted in this study. The influence of variations in the azimuthal angle (θ) and polar angle (φ) of coarse particles on drainage channel structure was analyzed, and the drainage mechanism of the bed was studied. Results showed that water discharge in the bed reduced the size of pores and throat channels, increasing slurry concentration. The throat channel structure was a key component of the drainage process. The φ and θ of particles changed predominantly along the length direction. The changes in φ had a cumulative plugging effect on the drainage channel and increased the difficulty of water discharge. The rake and rod formed a shear ring in the tailings bed with shear, and the θ distribution of particles changed from disorderly to orderly during the rotation process. The drainage channel was squeezed during the shearing process with the change in θ, which broke the channel structure, encouraged water discharge in the bed, and facilitated a further increase in slurry concentration. The findings of this work are expected to offer theoretical guidance for preparing high-concentration underflow in the tailings thickening process.
- tailings thickening;
- coarse particle;
- azimuthal angle;
- polar angle;
- drainage channels

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References(49)

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