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Volume 30 Issue 12
Dec.  2023
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文章导航 >  矿物冶金与材料学报（英文）  > 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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研究论文

粗颗粒极角和方位角的变化对尾砂浓密床层导水通道结构的影响研究

  • 1)

    北京科技大学金属矿山高效开采与安全教育部重点实验室, 北京 100083, 中国

  • 2)

    北京科技大学顺德创新学院, 佛山 528399, 中国

  • 3)

    CI2MA and Departamento de Ingeniería Matemática, Facultad de Ciencias Físicas y Matemáticas, Universidad de Concepción, Casilla 160-C, Concepción, Chile

  • 4)

    北京科技大学冶金与生态工程学院, 北京 100083, 中国

  • 5)

    北京科技大学土木与资源工程学院, 北京 100083, 中国



  • 通讯作者:

    阮竹恩    E-mail: ustb_ruanzhuen@hotmail.com

文章亮点

  • (1) 浓密过程中导水通道体积下降且孔喉结构参数是床层排水的关键因素。
  • (2) 研究了床层中粗颗粒的方位角和极角变化对导水通道结构产生的影响。
  • (3) 揭示了床层中粗颗粒的θ和φ变化对床面排水的作用机理。
  • 本研究对床层中的导水通道和尾砂粗颗粒进行了三维重建和定量表征。分析了粗颗粒方位角(θ)和极角(φ)的变化对导水通道结构的影响，并研究了床层的排水机理。结果表明，床层内水的排出使球状孔隙和棍状孔喉结构的尺寸减小，从而增加了料浆浓度，并且棍状孔喉结构是排水过程的关键组成部分。粗颗粒的 φ 和 θ 主要沿粗颗粒的长轴方向变化。φ的变化对床层内导水通道结构产生了累积堵塞效应，增加了排水的难度。耙架和导水杆结构在浓密床层上形成了剪切环，在耙架剪切过程中，粗颗粒的 θ 分布由无序变为有序。在剪切过程中，导水通道结构随着 θ 的变化而受到挤压，从而导致导水通道结构破裂，促进了床层中水的排出，有利于料浆浓度的进一步提高。该成果有望为尾砂浓密过程中高浓度底流的制备提供理论指导。
    • Research Article

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

    + Author Affiliations
      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.
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    • Supplementary Information-10.1007s12613-023-2680-z.doc
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