云南某难选铅锌矿选矿新工艺试验研究  

Experimental Study on New Beneficiation Process for a Refractory Lead-Zinc Ore in Yunnan

作　　者：赵家林 刘进 张红英 ZHAO Jialin;LIU Jin;ZHANG Hongying(Institute of Resource Utilization and Rare Earth Development,Guangdong Academy of Sciences,Guangzhou 510650,China;State Key Laboratory of Rare Metals Separation and Comprehensive Utilization,Guangzhou 510650,China;Guangdong Provincial Key Laboratory Development and Comprehensive Utilization of Mineral Resources,Guangzhou 510650,China)

机构地区：[1]广东省科学院资源利用与稀土开发研究所,广州510650 [2]稀有金属分离与综合利用国家重点实验室,广州510650 [3]广东省矿产资源开发与综合利用重点实验室,广州510650

出　　处：《有色金属（选矿部分）》2023年第5期81-86,112,共7页Nonferrous Metals（Mineral Processing Section）

基　　金：广东省科学院发展专项资金项目(2022GDASZH-2022010104)。

摘　　要：针对云南某难选铅锌矿,原采用的选矿流程为“铅优先浮选—锌硫混浮—锌硫分离”高碱工艺,铅精矿、锌精矿品位及回收率不高,导致资源浪费,为提高生产指标,在探索试验的基础上确定了铅锌顺序优先浮选低碱清洁新工艺,试验主要考察了磨矿细度、矿浆pH值、浮选抑制剂及捕收剂等因素对选别指标的影响,并确定了最佳的药剂制度。在最佳条件试验基础上,采用铅锌顺序优先浮选清洁工艺,对Pb品位3.62%、Zn品位4.04%、含Ag 19.04 g/t的原矿进行选别,最终获得了Pb品位65.70%、含Zn 2.36%、含Ag 150 g/t, Pb回收率92.93%、Ag回收率40.31%的铅精矿和Zn品位53.89%、含Pb 1.46%、含Ag 115 g/t, Zn回收率为88.71%的锌精矿,较原高碱工艺流程Pb品位提高18.36个百分点、回收率提高5.46个百分点、Zn品位提高9.66个百分点、锌回收率提高4.65个百分点的良好指标。In view of a refractory lead-zinc ore in Yunnan,the original beneficiation flowsheet was lead selective flotation,zinc-sulfur bulk flotation,zinc-sulfur separation high-alkali process,the grade and recovery of lead concentrate and zinc concentrate were not high,resulting in waste of resources,in order to improve the production index,on the basis of exploratory test,a new low-alkali clean process of lead-zinc sequential selective flotation was determined.The effects of grinding fineness,pH value of pulp,flotation depressants and collectors on the separation indexes were investigated,and the optimal reagent system was determined.On the basis of optimum condition tests,the clean process of Pb-Zn sequential preferential flotation was adopted to beneficiate the ore with Pb grade of 3.62%,Zn grade of 4.04%and Ag content of 19.04g/t,and finally the ore with Pb grade of 65.70%,Zn content of 2.36%and Ag content of 150g/t was obtained.Lead concentrate with Pb recovery of 92.93%,Ag recovery of 40.31%and zinc concentrate with Zn grade of 53.89%,Pb content of 1.46%,Ag content of 115g/t,Zn recovery of 88.71%.Compared with the original high alkali process flow,Pb grade was improved by 18.36percentage points,the recovery was improved by 5.46percentage points,Zn grade was improved by 9.66percentage points and zinc recovery was increased by 4.65percentage points.

关 键 词：难选铅锌矿 低碱选矿工艺 优先顺序浮选 清洁选矿 

分 类 号：TD952[矿业工程—选矿] TD923