尾砂物理特性对其絮凝沉降性能影响规律的研究  

Study on the rules of influence of physical properties of tailings on their flocculation sedimentation performance

作　　者：谢佩 戴惠新[1] 赵明珠 Xie Pei;Dai Huixin;Zhao Mingzhu(Faculty of Land Resource Engineering,Kunming University of Science and Technology)

机构地区：[1]昆明理工大学国土资源工程学院

出　　处：《黄金》2023年第8期52-57,共6页Gold

基　　金：国家自然科学基金项目(51764023);矿物加工科学与技术国家重点实验室开放基金(BGRIMM-KJSKL-2021-03)。

摘　　要：尾砂絮凝沉降是矿山尾砂浓密脱水的关键技术。给料尾砂的物理特性直接影响了絮凝沉降的性能。试验开展了给料浓度、中值粒径及-38μm粒级占比等物理特性对其沉降性能的影响。研究结果表明:在不同物理特性的尾砂中,絮凝剂单耗存在最佳值。在最佳絮凝剂单耗下,尾砂絮凝沉降速度与给料浓度、-38μm粒级占比呈负相关,与中值粒径呈正相关;尾砂沉降的底流浓度与给料浓度、中值粒径呈正相关,与-38μm粒级占比呈负相关;通过建立拟合方程并进行显著性分析,得出3个因素对絮凝沉降性能的影响,认为尾砂的粒度组成对絮凝沉降的性能影响较大,是絮凝沉降过程中尾砂需要考虑的主要因素。研究结果为实际生产中絮凝沉降的操作参数选择提供参考。Tailings flocculation sedimentation is a key technology for the thickening and dewatering mine tailings.The physical properties of the feed tailings directly affect the performance of flocculation sedimentation.To investigate the influence of the physical properties,including feed concentration,median particle size,and-38μm particle size fraction,on the performance of flocculation sedimentation for tailings,an experimental study is conducted.The results show that for tailings with different physical properties,there exists an optimal unit consumption of flocculant.Under the optimal unit consumption the sedimentation rate of tailings is negatively correlated with the feed concentration and-38μm particle size fraction,but positively correlated with the median particle size;the underflow concentration of tailings is positively correlated with the feed concentration and median particle size but negatively correlated with the-38μm particle size fraction.By establishing fitting equations and analyzing the significance of various factors,the degree of the influence of the 3 factors on the performance of flocculation sedimentation was determined.It is believed that the particle size composition of tailings has a significant impact on the performance of flocculation sedimentation and is the main factor that needs to be considered in the flocculation sedimentation process.The research results provide a reference for the selection of operational parameters in the practical production of tailings flocculation sedimentation.

关 键 词：絮凝沉降 絮凝剂单耗 给料浓度 粒度组成 沉降速度 底流浓度 

分 类 号：TD803[矿业工程—矿山开采]