甘肃洛坝铅锌矿选矿流程考察与优化  

Investigation and Optimization of Processing Flowsheet for a Luoba Lead-zinc Mine in Gansu Province

作　　者：周贺鹏[1,2] 胡洁 段朝阳[3] 邓攀 钟志刚 张永兵[1] ZHOU Hepeng;HU Jie;DUAN Chaoyang;DENG Pan;ZHONG Zhigang;ZHANG Yongbing(Faculty of Resource and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou341000,Jiangxi,China;Jiangxi Key Laboratory of Mining Engineering,Ganzhou 341000,Jiangxi,China;Gansu Luoba Nonferrous Metal Group Co.,Ltd.,Longnan 742500,Gansu,China)

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000 [2]江西省矿业工程重点实验室,江西赣州341000 [3]甘肃洛坝有色金属集团有限公司,甘肃陇南742500

出　　处：《黄金科学技术》2019年第5期696-703,共8页Gold Science and Technology

基　　金：国家重点研发计划项目“含砷铜基多金属固废预脱杂与定向矿化技术”(编号:2018YFC1901602-3);青海省重大科技专项“铜铅锌清洁选冶新技术研究和应用示范”(编号:2018-GX-A7);青海省重点企业技术创新项目“高原高寒缺氧条件下铅锌硫化矿高浓度浮选分离技术应用”(编号:JC-2017-37)联合资助

摘　　要：我国铅锌矿产资源丰富,但其自然禀赋差且矿物组成复杂,导致其综合回收利用难度大。甘肃洛坝铅锌矿是一座含铅锌且伴生有少量银、硫的泥岩—细碎屑岩型铅锌矿床,因其矿石性质复杂,较早期形成的矿石性质发生明显变化,导致铅锌分选指标及精矿质量下降。为解决现有选矿生产过程中存在的问题,寻找适宜的改进措施和方法,以提高铅锌资源综合利用效率,在研究矿石性质的基础上开展了详细的工艺流程考察。研究结果表明:矿石中碳质、硅质等脉石矿物含量升高,碎磨过程易于泥化,且吸附性能和可浮性好,这些是影响铅锌分选指标的主要因素;通过优化碎磨工艺参数,减少了碳质、硅质等脉石矿物的泥化程度;在浮选工艺中添加适宜抑制剂,并采用高选择性的铅、锌矿物捕收剂,可显著提高铅、锌精矿品位和质量,大幅提高铅、锌回收率,从而实现该复杂含碳低品位铅锌资源的高效综合回收,并为同类矿产资源的选矿回收提供参考依据。The lead and zinc mineral resources are very abundance in China,but the lead-zinc metal quantity is much short for further mining.The resources are not of natural endowment,with difficulty of utilization.Type of lead-zinc deposit is variety and associated elements are rich.Sulfide minerals have similar interface properties and are difficult to separate.Widespread as the occurrence of resource is,the ores are mostly very low-grade, complexity of multi-components and difficult of separation. All of this up make it difficult to recover such resources efficiently and comprehensively. It is necessary to carry out systematic process optimization and technical research in order to improve the comprehensive utilization.The Luoba lead-zinc deposit in Gansu Province is a mudstone-fine clastic lead-zinc deposit,associated with a small amount of silver and sulfur.With the long-term exploitation and utilization,the valuable metal content of lead and zinc in the ore decreases,while the content of carbonaceous and siliceous minerals increases,which brings great interference to the separation and recovery of lead and zinc.There are some problems in lead and zinc concentrate production,such as lead concentrate grade decrease,zinc concentrate containing excessive silicon. As a result,the present mineral processing technology and reagent system can’t adapt to the change of ore properties well. Therefore,a systematic process optimization and technical research should be carried out to find out the quality decline of concentrate and the possible problems in the process of concentration,and to explore the difficulties and physical factors in the recovery of lead and zinc flotation,so as to improve the comprehensive utilization level of resources.On the basis of detailed understanding of mineral processing technology and production status,an overall processing flowsheet investigation was conducted.It has been studied that the technical parameters and production conditions of each operation of grinding and floating process.Then the di

关 键 词：铅锌硫化矿 流程考察 磨矿分级 工艺优化 细粒浮选 高效回收 

分 类 号：TD952[矿业工程—选矿]