超导磁选白云鄂博尾矿稀土颗粒捕获及聚集行为  

Trapping and Aggregation Behavior of Rare Earth Particles in Bayan Obo Tailings by Superconducting Magnetic Separation

作　　者：刘昕旸 白庆伟 赵增武[1] 许鹏 贺宇龙 贾艳 LIU Xinyang;BAI Qingwei;ZHAO Zengwu;XU Peng;HE Yulong;JIA Yan(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia,China;School of Mining and Coal,Inner Mongolia University of Science and Technology,Baotou 014010,Inner Mongolia,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]内蒙古科技大学矿业与煤炭学院,内蒙古包头014010

出　　处：《有色金属（选矿部分）》2024年第4期144-153,共10页Nonferrous Metals（Mineral Processing Section）

基　　金：国家重点研发计划专项(2020YFC1909100)。

摘　　要：超导磁分离技术中,稀土矿物颗粒在磁介质上的聚集半径与磁介质填充率应相互匹配,以确保高效的矿物分离效果和提高稀土尾矿资源利用率。基于颗粒轨迹模型,探究了矿浆流速对颗粒捕获的影响并建立了颗粒饱和聚集模型,以计算稀土矿物颗粒单体及其连生体在磁介质上的饱和聚集半径、聚集半径和磁介质间距关系,从而优化磁介质填充率。并通过颗粒沉积试验,验证了聚集模型的正确性。研究结果表明,矿浆流动速度最优为0.1m/s时有效去除了杂质萤石矿物。磁介质有一个临界填充率,高于临界填充率不会发生堵塞。随着磁介质直径的增加,颗粒饱和聚集半径rBa和磁介质临界填充率逐渐增大,当连生体度为1/20的稀土连生体与磁介质直径为0.06mm时,临界填充率为5.6%。当磁介质直径为0.4mm时临界填充率为20.6%。本研究结果为稀土矿物的高效分离提供了重要的理论基础,也为工业生产中磁分离技术的优化与设计提供了可靠的参考依据。In the superconducting magnetic separation technology,the aggregation radius of rare earth mineral particles on the magnetic medium and the filling rate of the magnetic medium should match each other,so as to ensure the efficient mineral separation effect and improve the utilization rate of rare earth tailings resources.Based on the particle trajectory model,the influence of slurry velocity on particle capture has been explored,and a particle saturation aggregation model has been established to calculate the saturation aggregation radius of rare earth mineral free and intergrown particles on the magnetic medium,and the relationship between the aggregation radius and the magnetic medium distance,so as to optimize the filling rate of the magnetic medium.The aggregation model is verified by particle deposition experiment.The results show that impurity fluorite mineral can be effectively removed when the slurry flow velocity is optimal at 0.1m/s.Magnetic media have a critical filling rate,above which plugging will not occur.With the increase of magnetic medium diameter,the particle saturation aggregation radius rBaand the critical filling rate of magnetic medium increase gradually.For rare earth intergrown particles with a locking degree of 1/20,when the diameter of magnetic medium is 0.06mm,the critical filling rate is 5.6%.When the magnetic medium diameter is 0.4 mm,the critical filling rate is 20.6%.This study provides an important theoretical basis for the efficient separation of rare earth minerals,and also provides a reliable reference for the optimization and design of magnetic separation technology in industrial production.

关 键 词：磁介质 超导磁分离 稀土颗粒 连生体 颗粒聚集 

分 类 号：TD954[矿业工程—选矿] TD924