东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (4): 151-158.DOI: 10.12068/j.issn.1005-3026.2025.20239060

• 资源与土木工程 • 上一篇    

电渗改良尾矿泥力学性能试验研究

魏作安, 张雪怡, 郭宏伟, 路停   

  1. 重庆大学 资源与安全学院,重庆 400044
  • 收稿日期:2023-12-05 出版日期:2025-04-15 发布日期:2025-07-01
  • 作者简介:魏作安(1965—),男,江西南昌人,重庆大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(52304124);重庆市自然科学基金资助项目(CSTB2022NSCQ-MSX0497)

Experimental Study on Electroosmotic Improvement of Mechanical Properties of Tailings Mud

Zuo-an WEI, Xue-yi ZHANG, Hong-wei GUO, Ting LU   

  1. School of Resources and Safety Engineering,Chongqing University,Chongqing 400044,China. Corresponding author: WEI Zuo-an,E-mail: weiza@cqu. edu. cn
  • Received:2023-12-05 Online:2025-04-15 Published:2025-07-01

摘要:

为探究电渗改良尾矿泥力学性能的可行性与效果,以电压梯度、电压加载方式为变量,利用自制的电渗试验箱对铜尾矿泥和磷尾矿泥分别开展室内电渗试验.通过分析电渗过程中的排水量与电流衰减规律以及电渗改良后尾矿泥的含水率、干密度和抗剪强度等指标,并结合电渗能耗,探究了电渗改良尾矿泥力学性能的有效性及最佳作用方式.结果表明:电渗排水量与电压强度和电压加载级数正相关;相较于单级电压加载,多级电压加载时的电流衰减趋势减缓,电渗结束后尾矿泥的含水率更低、干密度更大、抗剪强度更高,力学性能的改良效果更优;在电渗过程中,多级电压加载的平均能耗比单级加载更低;电渗改良尾矿泥力学性能的最佳作用方式为15—20—25—30 V 4级电压加载.

关键词: 尾矿泥, 电渗排水, 多级加载, 抗剪强度, 能耗分析

Abstract:

To investigate the feasibility and effectiveness of improving the mechanical properties of tailings mud by electroosmosis, voltage gradient and voltage loading method were used as variables, and the self-made electroosmotic test chamber was used to carry out indoor electroosmotic tests on copper tailings mud and phosphorus tailings mud. By analyzing the drainage volume and current attenuation during the electroosmosis, as well as the moisture, dry density and shear strength of the tailings mud after electroosmotic improvement, combined with the energy consumption of electroosmosis, the effectiveness and best way for improving the mechanical properties of tailings mud by electroosmosis were explored. The test results show that electroosmotic drainage is positively correlated with voltage intensity and voltage loading stages. Compared with single-stage voltage loading, the current attenuation trend of multi-stage voltage loading slows down. After the end of electroosmosis, the water content of tailings mud is lower, the dry density is larger, the shear strength is higher, and the improvement effect of mechanical properties is better. During the electroosmotic process, the average energy consumption of multi-stage voltage loading is lower than that of single-stage loading. The best way to improve the mechanical properties of tailings mud by electroosmosis is 15—20—25—30 V four-stage voltage loading.

Key words: tailings mud, electroosmotic dewatering, multi-stage loading, shear strength, energy consumption analysis

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