国外某复杂低品位铅锌矿选矿工艺优化及应用  

Optimization and application of beneficiation process for a complex low grade lead-zinc ore abroad

作　　者：刘耀武 张恒 米寰鹏 冯晓燕 LIU Yao-wu;ZHANG Heng;MI Huan-peng;FENG Xiao-yan(China Nonferrous Metal Industry′s Foreign Engineering And Construction Co.,Ltd,Beijing 100029,China;BGRIMM Technology Group,Beijing 100160,China;State Key Laboratory of Mineral Processing Science and Technology,Beijing 102628,China)

机构地区：[1]中国有色金属建设股份有限公司,北京100029 [2]矿冶科技集团有限公司,北京100160 [3]矿物加工科学与技术国家重点实验室,北京102628

出　　处：《矿冶》2022年第4期56-63,共8页Mining And Metallurgy

摘　　要：某铅锌矿原矿铅含量为1.26%、含锌6.53%、含硫30.38%。生产上采用“铅锌依次优先浮选-中矿顺序返回”工艺流程,生产指标为铅精矿铅品位50.69%、含锌12.61%、铅回收率75.53%、锌精矿锌品位48.77%、含铅1.59%、锌回收率73.91%。铅、锌互含较高,锌精矿指标不理想。为了解决该问题,在了解现场生产工艺流程及矿石性质的基础上,针对该铅锌矿开展了详细的选矿工艺优化试验,通过对部分药剂制度进行优化,采用特效捕收剂BK-LY11,同时在锌浮选回路采用中矿再磨工艺,显著改善了铅、锌互含情况,有效提高了铅、锌选别指标,并成功应用于生产实践,优化后获得的铅、锌回收率分别提高了5.83、8.46个百分点。The raw ore of a lead-zinc ore contains 1.67%Pb,6.85%Zn and 16.22%S.In production,the process of"lead-zinc sequential priority flotation and middling sequential return"is adopted.The production indexes are lead concentrate grade 50.69%,zinc content12.61%,lead recovery 75.53%,zinc concentrate grade 48.77%,lead content 1.59%,zinc recovery 73.91%.The mutual content of lead and zinc is high and the index of zinc concentrate is not ideal.In order to solve the problem,on the basis of understanding the on-site production process and the properties of the ore,a detailed beneficiation process optimization test was carried out on the lead-zinc mine.Through the medicament system optimization,use of the new efficient collector BK-LY11,as well as adoption of the middlings grinding prooess in the zinc flotation circuit,the lead and zinc content was significantly improved,and the lead and zinc concentrate indexes were improved and successfully practiced in production.The recoveries of lead and zinc improved by 5.83 and 8.46 percentage points respectively after optimization.

关 键 词：低品位铅锌矿 方铅矿 闪锌矿 黄铁矿 铅锌分离 高效综合回收 

分 类 号：TD952[矿业工程—选矿]