贵州某卡林型金矿精锐微泡浮选生产实践  

Production Practice of JRF Micro-bubble Flotation on Carlin Types Gold Ore in Guizhou

作　　者：彭科淇 周瑞仙 PENG Keqi;ZHOU Ruixian(Guizhou Zijin Mining Co.,Ltd.,Zhenfeng 562200,Guizhou,China)

机构地区：[1]贵州紫金矿业股份有限公司,贵州贞丰562200

出　　处：《黄金科学技术》2023年第4期689-697,共9页Gold Science and Technology

摘　　要：贵州某卡林型金矿原矿金品位较低,有用矿物与脉石矿物嵌布粒度细,有害元素As和C含量较高,常规细磨浮选工艺金回收率仅为80.54%,尾矿金品位为0.97×10^(-6),浮选尾矿金损失较为严重。为了提高金精矿回收率,降低浮选尾矿金品位,开展了工艺矿物学及精锐微泡浮选工业试验研究。结果表明:常规细磨浮选尾矿中损失的金主要以-38μm粒级的贫连生体形式损失,且金含量较高。常规细磨浮选无法捕收的微细颗粒矿物,是造成浮选尾矿金损失的主要原因。采用精锐微泡浮选技术对扫选Ⅳ的尾矿进行再选试验,结果表明:精锐微泡浮选对尾矿中-38μm粒级的微细颗粒矿物有显著捕收效果,工艺优化后,金累计回收率为82.39%,提高了1.85个百分点,尾矿金品位为0.88×10^(-6),降低了0.09×10^(-6),浮选指标逐渐转好,提升了企业经济效益。The raw ore of a carlin gold mine in Guizhou has low gold grade,fine disseminated granularity of valuable minerals and gangue minerals,and high content of harmful elements arsenic and carbon.The recovery rate of conventional fine grinding flotation process is only 80.54%and the gold grade of tailing is 0.97×10^(-6),the loss of flotation tailing gold is relatively serious.In order to improve the recovery rate of gold concentrate and reduce the gold grade of flotation tailing,the process mineralogy study of secondary grinding classification overflow and flotation tailing was carried out to find out the gold distribution and loss.The results show that the gold lost in conventional fine grinding flotation tailing is mainly sulfide wrapped gold,which is mainly lost in the poor coenobium of−38μm grade,accounting for 60.70%,and the lost sulfide gold content is high.Secondly,there are a small amount of dissociated monomer and a small amount of fusant,which are not fully recovered due to the fine particle size,and also lost in the tailings.The main cause of the loss of gold in flotation tailing is that the fine particle minerals cannot be caught by conventional fine grinding flotation.Combined with the site production situation,the JRF micro-bubble flotation was applied to rough selectionⅠoperation and scavengeⅣtailing for reselection test.The test results show that JRF micro-bubble flotation has a significant catching effect on some fine particle minerals in tailing,which can further strengthen the capture of sulfide poor coenobium of−38μm grade and a amount dissociation monomer of−20μm grade in conventional fine grinding flotation scavengeⅣtailing,and reduce the loss of gold in flotation tailing.After the technical transformation,the cumulative recovery rate of gold is 82.39%and the tailing grade is 0.88×10^(-6).The recovery rate increased by 1.85 percentage points,and the tailing grade decreased by 0.09×10^(-6),and the flotation index was gradually improved,which increased the economic benefits of ent

关 键 词：金 工艺矿物学 精锐微泡浮选 浮选尾矿 回收率 微细颗粒 

分 类 号：TD923[矿业工程—选矿]