全尾砂絮凝沉降规律实验研究

发布时间：2018-06-23 07:07

本文选题：全尾砂 + 絮凝沉降　；参考：《矿业研究与开发》2017年03期

【摘要】：充填料浆制备是充填采矿过程中的重要组成部分,全尾砂絮凝沉降是料浆制备的关键技术。为探讨某铁矿山全尾砂絮凝沉降规律,采用正交试验法以尾砂浆入料浓度、絮凝剂单耗、絮凝剂溶液浓度和聚丙烯酰胺分子量为自变量,以沉降速度、极限浓度和上清液含固率为考察指标开展全尾砂絮凝沉降实验。对实验数据进行极差分析,结果表明:絮凝剂单耗和尾砂浆入料浓度是影响全尾砂絮凝沉降效果的主要因素,聚丙烯酰胺分子量和絮凝剂溶液浓度为次要因素;沉降速度与聚丙烯酰胺分子量和絮凝剂单耗正相关,与尾砂浆入料浓度负相关,极限浓度与尾砂浆入料浓度和聚丙烯酰胺分子量正相关,上清液含固率与尾砂浆入料浓度和絮凝剂溶液浓度正相关;本次实验范围内最佳絮凝剂单耗为20g/t,最佳尾砂浆入料浓度为15%,聚丙烯酰胺最佳分子量为1800万,絮凝剂溶液浓度最佳为0.4%。
[Abstract]:The preparation of filling slurry is an important part in the process of filling mining, and the flocculation settlement of whole tailings is the key technology of slurry preparation. In order to probe into the flocculation settlement law of the whole tailings of a certain iron mine, the orthogonal test method was used to take the concentration of the tail-mortar, the unit consumption of the flocculant, the concentration of the flocculant solution and the molecular weight of polyacrylamide as independent variables and the settling speed as the independent variables. Limit concentration and solid content of supernatant were investigated. The results show that the unit consumption of flocculant and the concentration of tailings mortar are the main factors affecting the flocculation settlement of the whole tailings, and the molecular weight of polyacrylamide and the concentration of flocculant solution are the secondary factors. The settling velocity was positively correlated with the molecular weight of polyacrylamide and the unit consumption of flocculant, negatively with the concentration of tail mortar, and positively with the concentration of tail mortar and the molecular weight of polyacrylamide. The solid content of supernatant was positively correlated with the concentration of tail-mortar and the concentration of flocculant solution, the optimum consumption of flocculant was 20g / t, the optimum concentration of tail-mortar was 15g, the optimum molecular weight of polyacrylamide was 18 million, The best concentration of flocculant solution is 0.4.
【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实验室;华北理工大学;
【基金】：华北理工大学大学生创新训练项目(X2015087) 河北省自然科学基金项目(E2016209220)
【分类号】：TD853.34

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