细粒级尾砂絮凝沉降特性研究

Study on the Flocculation Settlement Characteristics of Fine-grained Tailings

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： Tailings settlement development of beneficiation efficiency. In order to study flocculation settlement tests is an important process of the filling mining system. The tailings size is becoming finer with the technology, and the slow settlement speed of fine-grained tailings has seriously affected the filling the settlement characteristics of fine：grained tailings under the multi-factor coupling, the static of fine-grained tailings were conducted by the orthogonal test method, and the optimum value ofeach influencing factor was discussed under the conditions of the best sedimentation rate and under/low concentration, ine range analysis and regression analysis on the test results showed that the optimum flocculation agent for tailings settlement was anionic polyacrylamide. The feeding concentration of railings was the most significant factor affecting the settlement speed, fol- lowed by solution concentration and unit consumption of flocculant. The parameters influencing underflow concentration in the sequence of significance were the feeding concentration of tailings, the unit consumption of flocculant and the solution concen- tration of flocculant. Finally, the recommended settlement parameters for fine-grained tailings were the feed concentration of tailimzs of 20%, the unit consumption of flocculant of 140 g/t and the solution concentration of floeculant of 0.1%.