某厂含锑金矿浮选工艺改进研究

Study on improvement of flotation process of antimony-bearing gold ore in a plant

国内某厂含锑金矿的选矿回收率偏低。为提高选矿回收率,有效利用矿产资源,增加企业经济效益,进行了磨矿细度、浮选药剂捕收剂、抑制剂、活化剂种类和用量的实验研究。结果表明,在磨矿细度为-0.045 mm粒级占93.52%,抑制剂焦亚硫酸钠+新型药剂GT-1用量(200+200)g/t,活化剂硝酸铅用量400 g/t,捕收剂丁基钠黄药用量500 g/t、乙硫氮200 g/t,新型药剂GT-2用量400 g/t,起泡剂2#油用量30 g/t条件下,经一粗四扫三精浮选闭路流程,锑回收率达77.33%,金回收率59.16%。结合闭路试验结果,对工业选矿生产流程进行了优化改进,技术指标提升明显。

The recovery rate of antimony-bearing gold ore in a domestic plant is low.In order to address this problem,experimental studies were carried out to investigate the mineral processing including the flotation grinding fineness,the types and amounts of flotation reagents,collectors,inhibitors,and activators.Their effect of on the flotation recovery was analyzed.The results show that the recovery rate of antimony and gold reached 77.33%and 59.16%,respectively,after the closed-circuit flotation process of one rough four sweeps and three refinements when the grinding fineness was-0.045 mm which accounted for 93.52%,the dosage of inhibitor sodium pyrosulfite+new agent GT-1 was(200+200)g/t.Other mineral processing conditions were as follows:400 g/t lead nitrate activator,500 g/t sodium butyl xanthate collector,200 g/t ethyl sulfide,400 g/t new agent GT-2 and 30 g/t foaming agent 2#oil.Combined with the original closedcircuit method,this mineral processing technique greatly improves the recovery rate of antimony and gold.