氰化尾渣微细粒金电解微泡浮选创新实验设计

Innovative experimental design on recovery of fine gold from cyanide tailings by electrolytic microbubble flotation

基于“两山论”及微细粒电解微泡浮选研究热点,设计了氰化尾渣微细粒金电解微泡浮选本科生创新实验。利用自制的电解微泡浮选实验装置,结合氰化尾渣工艺矿物学分析,采用单因素法重点考查了电解时间、电流大小、阴极孔径及浮选药剂对氰化尾渣电解微泡浮选的影响。闭路实验采用“一次粗选—两次扫选—两次精选”工艺流程,获得金品位为25.40 g/t、金回收率为71.91%的金精矿。同时,基于气泡矿化理论分析,探究了不同流态条件下电解微泡浮选机理,形成了从实验装置搭建、样品制备分析、条件优化、流程设计以及机理研究分析等完整的创新性实验闭环设计,克服了传统实验设计被动地“照单抓药”以及对探究能力关注不够等问题,取得了良好的实验教学效果。

Based on the two mountains theory and the research hotspots of microbubble flotation of fine gold particles,the innovation experiment of microbubble flotation of cyanide tailings is designed.The effects of electrolytic time,current size,cathode pore size and flotation reagent on the electrolytic microbubble flotation of cyanide tailings are investigated by single factor method based on the self-made electrolytic microbubble flotation experimental device,combined with the mineralogy analysis of the cyanide tailings.In the closed circuit experiment,a gold concentrate with gold grade of 25.40 g/t and gold recovery of 71.91%is obtained by the process of one roughing,two scavenging and two cleaning.At the same time,based on the theoretical analysis of bubble mineralization,the mechanism of electrolytic microbubble flotation under different flow conditions is explored,and a complete innovative experimental closed-loop design is formed,including the experimental device,sample preparation and analysis,condition optimization,process design and mechanism research and analysis,etc.,which overcome the shortcomings of traditional experimental design,such as passive grasping medicine by single and insufficient exploration ability,and has achieved good results in experimental teaching.