金属离子对微细粒锂辉石与长石浮选矿浆流变性的影响  

Effect of Metal Ions on Rheological Properties of Fine Spodumene Flotation Pulp

作　　者：杨志兆 张博远 朱光杰 周贺鹏 罗仙平[1,2] YANG Zhizhao;ZHANG Boyuan;ZHU Guangjie;ZHOU Hepeng;LUO Xianping(Jiangxi Provincial Key Laboratory of Environmental Pollution Control of Mining and Metallurgy,Ganzhou 341000,China;School of Resource and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西省矿冶环境污染控制重点实验室,江西赣州341000 [2]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《金属矿山》2023年第8期104-110,共7页Metal Mine

基　　金：国家自然科学基金项目(编号:52064017);江西省重点研发计划项目(编号:20214BBG74001);江西省青年井冈学者奖励计划项目(编号:QNJG2020048);江西理工大学清江青年英才支持计划项目(编号:JXUSTQJBJ2020002)。

摘　　要：微细粒锂辉石浮选回收难度大,金属离子可在锂辉石矿物表面生成羟基络合物及氢氧化物沉淀,从而改变微细粒锂辉石矿物表面动电位、矿物颗粒分布状态和矿物颗粒尺寸等性质,使矿浆流变特性发生改变。为充分了解金属离子对微细粒锂辉石和长石矿浆流变特征及其浮选行为的影响,开展了流变特性测试、浮选试验、表面动电位测试、EDLVO理论计算和矿浆流体形态观测等试验研究。结果表明:Mn^(2+)、Ca^(2+)和Fe3+均能改变微细粒锂辉石和长石矿浆的表观黏度和屈服应力等流变特性,Mn^(2+)在增大微细粒锂辉石矿浆表观黏度和屈服应力的同时也能提升其浮选回收效果,而Mn^(2+)在碱性条件下能抑制微细粒长石的浮选回收,从而扩大微细粒锂辉石和长石的可浮性差异;在Mn^(2+)的活化作用下,微细粒锂辉石和长石颗粒间作用力以疏水作用吸引力为主导,矿物颗粒间的聚集效应加剧,使得矿浆悬浮液中网络状空间结构的强度进一步增强,改善了微细粒锂辉石浮选回收效果,为微细粒锂辉石矿浆流变性的定向调控及其浮选分离回收提供新的思路。The flotation recovery of fine Spodumene is difficult.Metal ions can generate hydroxyl complexes and hydroxide precipitates on the surface of Spodumene minerals,thus changing the surface dynamic potential of fine Spodumene minerals,mineral particle distribution state,mineral particle size and other properties,and changing the rheological properties of pulp.To fully understand the influence of metal ions on the rheological characteristics and flotation behavior of ultrafine Spodumene and feldspar pulp,experimental studies such as rheological property test,flotation test,surface dynamic potential test,EDLVO theoretical calculation and slurry fluid morphology observation were carried out.The results show that Mn^(2+),Ca^(2+)and Fe3+can change the apparent viscosity and yield stress of fine Spodumene and feldspar pulp.Mn^(2+)can increase the apparent viscosity and yield stress of fine Spodumene pulp as well as improve its flotation recovery effect.However,Mn^(2+)can decrease the flotation recovery of fine feldspar under alkaline conditions,so it can enlarge the floatability difference between fine Spodumene and feldspar.Under the activation of Mn^(2+),the force between fine Spodumene and feldspar particles is dominated by hydrophobic attraction,and the aggregation effect between mineral particles is intensified,which further enhances the strength of the network like spatial structure in the slurry suspension,improves the flotation recovery effect of fine Spodumene,and provides a new idea for the directional control of the rheological properties of fine Spodumene slurry and its flotation separation recovery.

关 键 词：锂辉石 微细粒 流变性特征 金属离子 

分 类 号：TD923[矿业工程—选矿] TD97