粒度对粉煤灰旋转摩擦电选效果的影响研究  

Study on Effect of Particle Size in Rotary Triboelectrostatic Separation of Fly Ash

作　　者：叶世旺[1] 陶东平 陶有俊[3] 黄志敏[1] 薛刘萍[1] 张雷[1] YE Shiwang;TAO Dongping;TAO Youjun;HUANG Zhimin;XUE Liuping;ZHANG Lei(School of Materials and Physics,China University of Mining and Technology,Xuzhou 221116,China;School of Resources and Environmental Engineering,Shandong University of Technology,Zibo 255000,China;School of Chemical Engineering and Technology,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学材料与物理学院,江苏徐州221116 [2]山东理工大学资源与环境工程学院,山东淄博255000 [3]中国矿业大学化工学院,江苏徐州221116

出　　处：《煤炭技术》2022年第2期219-222,共4页Coal Technology

基　　金：国家自然科学基金资助项目(51274200);国家自然科学基金青年基金资助项目(51804302)。

摘　　要：为探究粉煤灰颗粒粒径对旋转摩擦电选的影响,采用标准k-ε湍流模型结合颗粒轨道模型,在1~100μm选取11种粒径的球形碳、灰颗粒为研究对象,对相同条件下颗粒在摩擦起电器内的运动情况进行数值模拟。结果表明:颗粒在旋转起电器内的运动行为与颗粒的粒径及种类有关,颗粒粒径越小,颗粒跟随性越好,颗粒越难与摩擦轮碰撞摩擦,不利于颗粒摩擦带电,不利于分选;颗粒粒径大于30μm时,摩擦起电效果好,与实验结果基本一致。In order to investigate the influence of fly ash particle size in rotary triboelectrostatic separation,the standard k-εturbulence model and particle orbit model are adopted to simulate the motion of spherical carbon and ash particles with eleven particle sizes between 1μm and 100μm at the same air feed rate and friction wheel rotation speed.The simulation results show that the movement of particles inside the rotary electrostatic charger is related to the particle size and type of particles.The smaller the particle size is,the better the particle follows the air,the harder the particles are to collide with the friction wheel,which is not conducive to the triboelectrification of the particles and is not conducive to the separation;When the particle size is larger than 30μm,the triboelectrification effect is good,which is basically consistent with the experimental results.

关 键 词：旋转摩擦电选 粉煤灰 粒度 运动特性 

分 类 号：TD924[矿业工程—选矿]