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Volume 30 Issue 8
Aug.  2023
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文章导航 >  矿物冶金与材料学报（英文）  > 2023  >  30(8): 1548-1559
Xinghang Dai, Xiaozhong Gu, Jingru Zheng, Liang Zhao, Le Zhou,  and Haiqiang Jiang, Carbonate-activated binder modified by supplementary materials for mine backfill and the associated heavy metal immobilization effects, Int. J. Miner. Metall. Mater., 30(2023), No. 8, pp. 1548-1559. https://doi.org/10.1007/s12613-022-2540-2
Cite this article as:
Xinghang Dai, Xiaozhong Gu, Jingru Zheng, Liang Zhao, Le Zhou,  and Haiqiang Jiang, Carbonate-activated binder modified by supplementary materials for mine backfill and the associated heavy metal immobilization effects, Int. J. Miner. Metall. Mater., 30(2023), No. 8, pp. 1548-1559. https://doi.org/10.1007/s12613-022-2540-2
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研究论文

辅助材料改性碳酸盐激发充填胶凝材料及其对重金属的固化效应

  • 1)

    辽宁石油化工大学土木工程学院, 抚顺 113001, 中国

  • 2)

    辽宁省石油化工特种建筑材料重点实验室, 抚顺 113001, 中国

  • 3)

    东北大学深部金属矿山安全开采教育部重点实验室, 沈阳 110819, 中国

  • 4)

    长春黄金研究院有限公司, 长春 130012, 中国



  • 通讯作者:

    姜海强    E-mail: jianghaiqiang@mail.neu.edu.cn

  • 尾砂胶结充填（CPB）是尾砂资源化利用的有效手段，但是硅酸盐水泥（OPC）的高成本限制了其应用。考虑到Na2CO3激发胶凝材料的性能较差，本研究采用CaO、MgO和煅烧层状双氢氧化物(CLDH)等辅助材料对其性能进行改性，以寻找OPC的替代胶凝材料。在本研究中，等温量热仪、X衍射以及热重分析用来探索胶凝材料的水化动力学以及反应产物的物相组成，同时研究了CPB料浆的流动性、抗压强度演化以及胶结充填体对重金属的固化效果。研究结果表明，MgO与CLDH的耦合利用效果最好，Mg2-CLDH3养护56 d后的强度约为2.94 MPa，高于OPC样品。此外，改性的Na2CO3激发胶凝材料的成本低于OPC，并且具有良好的重金属固化效果。这些结果表明，辅助材料改性的碳酸盐激发胶凝材料适用于CPB。
    • Research Article

    Carbonate-activated binder modified by supplementary materials for mine backfill and the associated heavy metal immobilization effects

    + Author Affiliations
      Abstract
    • Cemented paste backfill (CPB) is one of the effective methods for resource utilization of tailings, but the high cost of ordinary Portland cement (OPC) limits its utilization. Considering the poor performance of Na2CO3-activated binders, in this work, supplementary materials, including CaO, MgO, and calcined layered double hydroxide (CLDH), were used to modify their properties with the aim of finding an alternative binder to OPC. Isothermal calorimetry, X-ray diffraction, and thermogravimetric analyses were conducted to explore the reaction kinetics and phase assembles of the binder. The properties of the CPB samples, such as flowability, strength development, and heavy metal immobilization effects, were then investigated. The results show that the coupling utilization of MgO and CLDH showed good performance. The strength of the Mg2-CLDH3 sample was approximately 2.94 MPa after curing for 56 d, which was higher than that of the OPC-based sample. Moreover, the cost of the modified Na2CO3-activated binder was lower than that of the OPC-based binder. Modified sample showed satisfactory heavy metal immobilization effects. These findings demonstrate that carbonate-activated binder modified by supplementary materials can be suitable in CPB.
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