欧孝夺, 黄中正, 罗炳雄, 等. 2023. 铝土尾矿泥浆逐级加砂堆排联合生石灰排水固化处理模型试验研究[J]. 工程地质学报, 31(1): 318-326. doi: 10.13544/j.cnki.jeg.2020-347.
    引用本文: 欧孝夺, 黄中正, 罗炳雄, 等. 2023. 铝土尾矿泥浆逐级加砂堆排联合生石灰排水固化处理模型试验研究[J]. 工程地质学报, 31(1): 318-326. doi: 10.13544/j.cnki.jeg.2020-347.
    Ou Xiaoduo, Huang Zhongzheng, Luo Bingxiong, et al. 2023. Model test study on treatment of bauxite tailing slurry by adding sand step by step combined with quicklime drainage and solidification[J]. Journal of Engineering Geology, 31(1): 318-326. doi: 10.13544/j.cnki.jeg.2020-347.
    Citation: Ou Xiaoduo, Huang Zhongzheng, Luo Bingxiong, et al. 2023. Model test study on treatment of bauxite tailing slurry by adding sand step by step combined with quicklime drainage and solidification[J]. Journal of Engineering Geology, 31(1): 318-326. doi: 10.13544/j.cnki.jeg.2020-347.

    铝土尾矿泥浆逐级加砂堆排联合生石灰排水固化处理模型试验研究

    MODEL TEST STUDY ON TREATMENT OF BAUXITE TAILING SLURRY BY ADDING SAND STEP BY STEP COMBINED WITH QUICKLIME DRAINAGE AND SOLIDIFICATION

    • 摘要: 为加快铝土尾矿泥浆的排水固结进程,提出一种在库区增设横竖向排水途径并联合生石灰固化的方法。通过增加排水路径和砂层的压载作用,使尾矿泥在较短时间内达到较好排水固结效果,并通过添加生石灰进一步增强尾矿泥的固化程度。本文通过开展模型试验,分析加砂与否模型中尾矿泥浆排水固结过程中各阶段的孔隙水压力、体积含水量和沿深度变化含水量等参数的变化特点,得出以下结论:加砂层对尾矿泥自重排水固结效果有较明显的提高;在自重排水稳定后和添加生石灰处理后,加砂堆排模型较堆排模型的尾矿泥平均含水量分别减少19.9%、14.6%,且沿深度范围内含水率分布更为均匀;同时发现加砂对生石灰固化尾矿泥的强度增长有促进作用。本研究可为铝土尾矿泥浆加砂堆排联合生石灰排水固化的工程实际应用提供一定的参考依据。

       

      Abstract: This paper aims to accelerate the drainage consolidation process of bauxite tailings slurry. It proposes a method of adding horizontal and vertical drainage consolidation and combined with quicklime consolidation. The increasing the drainage path and the ballast effect of the sand layer can result in that the tailing mud can achieve better drainage consolidation effect in a short period of time. The solidification degree of tailing mud can be further enhanced by adding quicklime. Based on the model test,this paper further analyzes the change characteristics of pore water pressure,volume water content and water content along the depth of tailings slurry in the process of drainage and consolidation in the model with and without adding sand. It draws the following conclusions: sand adding layer has obvious improvement on the self weight drainage and consolidation effect of tailings slurry; water content of tailings slurry in the model of adding sand layer is higher than that in the model of without adding sand layer. Meanwhile,it is found that the addition of sand can promote the strength growth of quicklime solidified tailing slime. This study can provide some reference for the practical application of bauxite tailing slurry,sand and quicklime drainage and solidification.

       

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