絮凝剂对全尾砂沉降性能影响试验研究  

Experimental research of flocculant influence on settlement characteristic of unclassified tailings

作　　者：刘志强 程海勇[2] 王贻明[2] 吴爱祥[2] 尹建东 

机构地区：[1]金诚信矿业管理股份有限公司,北京100089 [2]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《中国矿山工程》2015年第1期41-44,共4页China Mine Engineering

基　　金："十二五"国家科技支撑计划资助项目(2012BAB08B02);国家自然科学基金资助项目(51374034)

摘　　要：针对全尾砂细粒级含量多、自然沉降速度较慢的特点,在全尾砂沉降过程中一般需添加絮凝剂。结合某铁矿全尾砂物理及化学特性,研究了3种类型絮凝剂（阳离子型、阴离子型和非离子型）对沉降速率的影响。在筛选出最优类型（阴离子型）的基础上进一步探讨了絮凝剂单耗对尾砂沉降速率的影响程度,给出了合理单耗区间在40~50g/t。阐述了絮凝沉降机理,分析了絮团形成的过程及沉降的6个阶段。对生产实践及理论研究具有一定的指导作用。A certain amount of flocculant is needed to add during the settling process because of the low settling velocity caused by the abundance of fine particles in full tailings.Combined with the physical and chemical properties of full tailings in a iron mine,a study was taken to analyse the effect of different types of flocculant（cationic,anionic and non-ionic） on the settling velocity.The anionic flocculant was selected to be the best and further test was carried on to study the influence of flocculant dosage on settling velocity.Finally a dosage of 40~50g/t was proved to be suitable.The mechanism of flocculation and settling process was presented and the formation of floc and six stages of settling process were analyzed.The results can be applied to guide further practical and theoretical studies.

关 键 词：尾砂 絮凝剂 沉降 浓密 

分 类 号：TD350.4[矿业工程—矿井建设]