基于COMSOL Multiphysics的椭圆齿齿板介质的颗粒捕集行为  

Particle capture behavior of elliptic tooth grooved plate based on COMSOL Multiphysics

作　　者：孙自玺 薛子兴[1] 荆子航 卢东方[1] 王毓华[1] 郑霞裕[1] SUN Zixi;XUE Zixing;JING Zihang;LU Dongfang;WANG Yuhua;ZHENG Xiayu(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China)

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2022年第11期4207-4216,共10页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51804341);湖南省自然科学基金资助项目(2019JJ50833);中南大学和湖南省研究生教学改革项目(2020JGB033,2020JGYB043);中南大学研究生自主创新项目(2020zzts743)。

摘　　要：为进一步提升平环强磁选机的颗粒捕集性能和分选效果,以直角齿齿板介质为基准,采用COMSOL Multiphysics研究不同长径比的椭圆齿齿板介质的磁场特性、磁性颗粒运动规律及磁性颗粒的捕集行为。研究结果表明:对于两类齿板介质,低场强下,齿尖处均为磁性吸引区域,齿谷处均为磁性排斥区域,高场强下,椭圆齿介质齿谷会产生磁性吸引区域;椭圆齿齿板介质的颗粒捕集性能随长径比的增大而增加,且长径比λ≥1.5的椭圆齿齿板介质具有优于直角齿齿板介质的颗粒捕集性能,在平环强磁选机中具有较大的应用潜力。For further improving particle capture ability and separation performance of horizontal ring magnetic separator, the magnetic characteristics, the particle motion principles and particle capture behaviors of grooved plates with elliptic teeth of different aspect ratios were investigated on the basis of conventional right angle grooved plates using COMSOL Multiphysics. The results show that for right angle and elliptic tooth plates, the region around tooth tips and valleys respectively are magnetically attractive and repulsive in relatively low applied induction. Some parts of region around tooth valleys of elliptic tooth plates can also be transferred to be magnetically attractive in high applied induction. The particle capture ability of elliptic tooth plates increases with increasing aspect ratios and elliptic tooth plates with aspect ratio λ≥1.5 have superior particle capture performance than conventional grooved plates, which reveals that elliptic tooth plates have great application prospect in horizontal ring high intensity magnetic separation.

关 键 词：齿板介质 椭圆齿 长径比 颗粒捕集 

分 类 号：TD457[矿业工程—矿山机电]