菱镁矿粉体颗粒摩擦荷电试验与仿真研究  

Experiment and Simulation Study on Magnesite Powder Particle Friction Charging

作　　者：高海 王志强[1] 苏美璇 李国锋[1] GAO Hai;WANG Zhiqiang;SU Meixuan;LI Guo feng(School of Electrical Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]大连理工大学电气工程学院,辽宁大连116024

出　　处：《有色金属（选矿部分）》2022年第2期73-80,共8页Nonferrous Metals（Mineral Processing Section）

基　　金：辽宁省中央引导地方科技发展专项资金项目(2020JH6/10500020);国家自然科学基金资助项目(51607023)。

摘　　要：为了对粉体颗粒摩擦荷电过程进行数值模拟,以菱镁矿粉体颗粒为研究对象,利用离散元模型和电荷转移模型对粉体颗粒运动过程和摩擦荷电过程分别进行理论建模。在EDEM仿真软件中建立了适用于粉体颗粒摩擦荷电仿真的计算模块,并应用该模块进行菱镁矿粉体摩擦荷电仿真分析,考察给料量和滑槽倾斜角度对摩擦荷质比的影响,同时利用振动槽摩擦荷电装置进行菱镁矿粉体颗粒摩擦荷电对比试验研究。结果表明,菱镁矿粉体摩擦荷质比随给料量的增加而减小,随滑槽倾斜角度的增大而减小。试验结果得到了与仿真结果相似的变化趋势,验证了所建粉体颗粒摩擦荷电数值模型的准确性。研究结果对更精确粉体颗粒摩擦荷电模型的建立和粉体颗粒摩擦带电的进一步应用具有重要意义。In order to numerically simulate the friction charging process of powder particles,the magnesite powder particles is taken as the research object,the discrete element model and the charge transfer model are used to model the movement process of the powder particles and the friction charging process respectively.A calculation module suitable for friction charging simulation of powder particles is established in the EDEM simulation software,and the module is used to perform friction charging simulation analysis of magnesite powder,and to investigate the charge-to-mass ratio at different feed rate and chute inclination.At the same time,the friction charging device of vibrating trough is used to carry out comparative experimental research on friction charging of magnesite powder particles.The results show that the frictional charge-to-mass ratio of magnesite powder decreases with the increase of the feed rate,and decreases with the increase of the inclination angle of the chute.The test results have a similar trend to the simulation results,which verifies the accuracy of the numerical model of powder particle friction charging.Research results are of great significance for the establishment of a more accurate powder particle friction charging model and the further application of powder particle friction charging.

关 键 词：摩擦荷电 菱镁矿粉体 离散元模型 电荷转移模型 

分 类 号：O572[理学—粒子物理与原子核物理]