Experimental Study on the Permeability of Rare Earths with Different Particle Composition for a Novel Heap Leaching Technology

被引:3
|
作者
Ju, Wei [1 ]
Yang, Jianhua [1 ]
Yao, Chi [1 ]
Zhang, Xiaobo [1 ]
Ye, Zhiwei [1 ]
Liu, Da [2 ]
机构
[1] Nanchang Univ, Sch Infrastruct Engn, Nanchang 330031, Jiangxi, Peoples R China
[2] Jiangxi Acad Water Sci & Engn, Jiangxi Hydraul Safety Engn Technol Res Ctr, Nanchang 330029, Jiangxi, Peoples R China
来源
APPLIED SCIENCES-BASEL | 2022年 / 12卷 / 22期
基金
中国国家自然科学基金;
关键词
rare earth; heap leaching; permeability; particle gradation; particle migration; PREFERENTIAL FLOW; ORE;
D O I
10.3390/app122211368
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In order to solve the problem of vegetation restoration in the traditional heap leaching of rare earths, a novel heap leaching technology is proposed. In the novel technology, leaching liquid is laterally injected into the rare earth pile from the side end so that vegetation restoration can be carried out quickly on the top of the pile. In this study, a laboratory test was performed to investigate the permeability of the ion-adsorbed rare earth pile under lateral liquid injection conditions. Four rare earth samples with varied combinations of the mineral particles at different sizes were adopted in the test to emphatically discuss the influence of the particle composition on permeability. The experimental results show that the permeability of the rare earth pile under the lateral liquid injection conditions is governed by the migration of fine particles. As the hydraulic head of the leaching liquid increases, the fine particles undergo a motion process of stabilization, migration initiation, deposition, and remigration. Accordingly, the permeability coefficient of the rare earth pile exhibits a variation of stabilization, a gradual increase, a re-stabilization, and a re-increase. The fine particle migration and exudation causes the permeability of the rare earth pile to be non-uniform in space. The permeability coefficients near the liquid injection end and the liquid outlet end are much greater than those are at the middle positions of the pile. The particle composition of the rare earth has an important effect on the permeability of the pile. In the rare earth with a combination of coarse and fine particles, preferential flow paths are easy to develop as in this soil, the fine particles easily migrate and they cannot block the pore channels. By contrast, the fine particles find it difficult to migrate, and the permeability coefficient is relatively stable in the fine-medium particle rare earth. This particle composition is conducive to the heap leaching of the rare earth under lateral liquid injection conditions.
引用
收藏
页数:16
相关论文
共 50 条
  • [1] Study of Rare Earths Leaching After Hydrothermal Conversion of Phosphogypsum
    Amani Masmoudi-Soussi
    Ines Hammas-Nasri
    Karima Horchani-Naifer
    Mokhtar Férid
    Chemistry Africa, 2019, 2 : 415 - 422
  • [2] Study of Rare Earths Leaching After Hydrothermal Conversion of Phosphogypsum
    Masmoudi-Soussi, Amani
    Hammas-Nasri, Ines
    Horchani-Naifer, Karima
    Ferid, Mokhtar
    CHEMISTRY AFRICA-A JOURNAL OF THE TUNISIAN CHEMICAL SOCIETY, 2019, 2 (03): : 415 - 422
  • [3] RARE-EARTHS COMPOSITION OF DIFFERENT TYPES GRANITOIDS OF MONGOLIA
    BUDNIKOV, SV
    KOVALENKO, VI
    YARMOLYUK, VV
    DOKLADY AKADEMII NAUK, 1994, 338 (03) : 372 - 375
  • [4] Study on leaching rare earths from bastnaesite treated by calcification transition
    黄宇坤
    张廷安
    豆志河
    刘江
    唐方方
    Journal of Rare Earths, 2014, 32 (11) : 1043 - 1047
  • [5] Study on leaching rare earths from bastnaesite treated by calcification transition
    Huang Yukun
    Zhang Ting'an
    Dou Zhihe
    Liu Jiang
    Tang Fangfang
    JOURNAL OF RARE EARTHS, 2014, 32 (11) : 1043 - 1047
  • [6] Experimental study on influence of particle size composition on permeability coefficient anisotropy of loess
    Zhao Q.
    Su L.
    Liu H.
    He J.
    Yang J.
    Su, Lijun (sulijun1976@163.com), 1615, Central South University of Technology (51): : 1615 - 1626
  • [7] Study of manufacturing technology and properties of AVGCI with rare earths
    Sheng, D
    Yan, BX
    JOURNAL OF RARE EARTHS, 2001, 19 (01) : 44 - 48
  • [8] Study of Manufacturing Technology and Properties of AVGCI with Rare Earths
    盛达
    颜丙祥
    Journal of Rare Earths, 2001, (01) : 44 - 48
  • [9] Experimental and theoretical study of the behavior of hydrogen in rare earths
    Marchetti, JM
    Corso, HL
    Gervasoni, JL
    INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2005, 30 (06) : 627 - 630
  • [10] Investigation on permeability of filter cake with different particle sizes: Experimental and simulation study
    Chen, Ruxia
    Dong, Xianshu
    Feng, Zeyu
    Fan, Yuping
    Ma, Xiaomin
    POWDER TECHNOLOGY, 2024, 433