铅锌矿无石灰分支快速浮选回收铅  

Rapid flotation recovery of lead from lead-zinc ore without lime branching

作　　者：苏振华 刘兵 钟旭群 周志国 杨林源 廖红灯 SU Zhenhua;LIU Bing;ZHONG Xuqun;ZHOU Zhiguo;YANG Linyuan;LIAO Hongdeng(Guangxi Zhongjin Lingnan Mining Co.Ltd.,Laibin 545900,Guangxi,China)

机构地区：[1]广西中金岭南矿业有限责任公司,广西来宾545900

出　　处：《矿冶》2024年第3期416-422,437,共8页Mining And Metallurgy

摘　　要：广西盘龙铅锌矿中硫化铅矿物整体嵌布粒度细小,次生泥质高,采用传统的高碱药剂制度产出的铅精矿中铅回收率远低于硫化铅理论回收率,损失在锌尾矿中的铅较多。对原矿和尾矿进行化学成分、物相和筛析分析,并对比研究高碱体系和不添加石灰的无石灰浮选体系下的铅浮选动力学和闭路试验结果。结果表明,铅尾矿中损失的铅矿物中含有部分粒径为19μm以下的单体方铅矿;采用分支快速浮选工艺对盘龙铅锌矿矿石进行浮选试验研究可优化盘龙铅锌矿选矿指标,减少微细粒方铅矿矿物的流失;相较于原来的高碱浮选体系,无石灰浮选体系浮选所得铅精矿中铅回收率可提高8.07个百分点,-19μm部分铅金属损失率降低28.57个百分点;采用分支快速浮选工艺可有效提高微细粒方铅矿的浮选回收率。The lead sulfide minerals in the Panlong lead-zinc mine in Guangxi are overall considered fine in particle size distribution with a high secondary mud content.The lead recovery rate in the lead concentrate produced by the traditional high alkali chemical system is much lower than the theoretical recovery rate of lead sulfide,resulting in substantial lead losses in the zinc tailings.The chemical composition,phase,and sieve analyses were carried out on the raw ore and tailings.The lead flotation kinetics and closed-loop test under both high alkali and lime-free flotation systems were carried out as well.The results indicate that some of the lost lead minerals in the lead tailings contain single galena particles below 19μm.The use of branch rapid sorting technology for flotation experiments of Panlong lead-zinc ore can optimize the beneficiation indicators of Panlong lead-zinc ore and reduce the loss of fine-grained galena minerals.Compared to the original high-alkali flotation system,the lead recovery rate in the lead concentrate obtained by the lime-free flotation system can be increased by 8.07 percent.Moreover,the loss rate of lead metal particles below-19μm is reduced by 28.57 percent.The branch rapid flotation process can effectively enhance the flotation recovery rate of fine-grained galena.

关 键 词：硫化铅锌矿 微细粒 浮选工艺 高碱体系 无石灰体系 分支快速浮选 浮选动力学 

分 类 号：TD[矿业工程]