细粒级尾砂絮凝沉降特性研究

发布时间：2018-06-06 16:07

本文选题：细尾砂 + 絮凝沉降　；参考：《矿业研究与开发》2017年09期

【摘要】：尾砂沉降是充填采矿系统的重要组成部分。随着选矿技术的发展,尾砂粒径越来越细,细粒级尾砂沉降速度缓慢严重影响了矿山充填效率。为研究多因素耦合作用下细粒级尾砂的沉降特性,采用正交试验法开展细粒级尾砂静态絮凝沉降试验,探讨沉降速度和底流浓度最佳时各影响因素的最优值。对试验结果进行极差分析和回归分析后认为,尾砂沉降效果最优的絮凝剂是阴离子聚丙烯酰胺,尾砂浆入料浓度是影响沉降速度最显著的因素,其次是絮凝剂溶液浓度和絮凝剂单耗,影响底流浓度的显著性顺序为尾砂浆入料浓度、絮凝剂单耗、絮凝剂溶液浓度;推荐细粒级尾砂沉降参数为尾砂入料浓度20%,絮凝剂单耗140g/t,絮凝剂溶液浓度0.1%。
[Abstract]:Tailing settlement is an important part of filling mining system. With the development of mineral processing technology, the particle size of tailings is becoming smaller and smaller, and the slow settling rate of fine tailing has seriously affected the filling efficiency of mines. In order to study the settling characteristics of fine tailing under multi-factor coupling, the static flocculation settlement test of fine tailing was carried out by orthogonal test, and the optimum value of each factor was discussed when the settling velocity and the bottom flow concentration were optimal. The results of range analysis and regression analysis show that the best flocculant for tailings settlement is anionic polyacrylamide, and the concentration of tail-mortar is the most significant factor affecting the settling rate. The second is the concentration of flocculant solution and the consumption of flocculant. The significant order of influencing the bottom flow concentration is the concentration of tail-mortar, the unit consumption of flocculant and the concentration of flocculant solution. It is recommended that the settling parameters of fine grain tailing sand are the concentration of 20% tailings, the unit consumption of flocculant 140 g / t, and the concentration of 0.1 g / t of flocculant solution.
【作者单位】：华北理工大学矿业工程学院;河北省矿业开发与安全技术重点实验室;
【基金】：华北理工大学研究生创新项目(CXZZSS2017070、2017S02) 河北省自然科学基金项目(E2016209220)
【分类号】：TD926.4

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