微细氰化尾矿颗粒絮凝沉降实验研究

摘要

微细氰化尾矿颗粒沉降速度慢，脱水困难，需借助絮凝剂改善其沉降特性。文中主要将阳离子絮凝剂HLM 和非离子絮凝剂 PAM 对3种平均粒径分别为30，14，3μm 的氰化尾矿悬浮液进行了絮凝沉降及除浊实验，确定其最佳投加量，并对比了2种絮凝剂对不同粒度尾矿的絮凝性能。结果显示，对于3种不同粒度分布的悬浮液，HLM 的絮凝效果均优于 PAM，并且尾矿颗粒的粒径越小，阳离子絮凝剂的絮凝优势就越明显。%Fine cyanide tailing particles have slow settling speed and it is difficult for de-watering.Therefore,it is needed to use flocculant to improve the settlement characteristics of this kind of tailings.In this paper,the optimum dosage of cationic flocculant HLM and nonionic flocculant PAM are determined by the sedimentation and turbidity removal experiment of cyanide tailings suspensions,the average particle size of which are 30 μm, 14 μm,3 μm respectively.In addition,the flocculation performance of two flocculants for different particle size of suspensions is compared.The results show that the flocculation effect of HLM is better than PAM for the three different particle size distribution of suspension.In addition,the smaller the particle size is,the more obvious the flocculation advantage of cationic flocculant is.