Influence of vibration mode on the screening process
Influence of vibration mode on the screening process作者机构:School of Mechanical and Electrical Engineering China University of Mining & Technology Key Laboratory of Coal Processing and High Efficient Cleaning and Utilization of Ministry of Education School of Chemical Engineering and Technology China University of Mining & Technology
出 版 物:《International Journal of Mining Science and Technology》 (矿业科学技术学报(英文版))
年 卷 期:2013年第23卷第1期
页 面:95-98页
核心收录:
学科分类:081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学]
基 金:financial support from the National Natural Science Foundation of China (No. 51204181) the Research Fund for the Doctoral Program of Higher Education of China (No.20110095120004) the Fundamental Research Funds for the Central Universities (Nos. 2011QNA10 and 2010QNB17) the China Postdoctoral Science Foundation (No. 20110491485) for this work
主 题:Vibration mode Screening process Particles Discrete element method
摘 要:The screening of particles with different vibration modes was simulated by means of a 3D discrete element method (3D-DEM). The motion and penetration of the particles on the screen deck were analyzed for linear, circular and elliptical vibration of the screen. The results show that the travel velocity of the particles is the fastest, but the screening efficiency is the lowest, for the linear vibration mode. The circular motion resulted in the highest screening efficiency, but the lowest particle travel velocity. In the steady state the screening efficiency for each mode is seen to increase gradually along the longitudinal direction of the deck. The screening efficiency increment of the circular mode is the largest while the linear mode shows the smallest increment. The volume fraction of near-mesh size particles at the underside is larger than that of small size particles all along the screen deck. Linear screening mode has more near-mesh and small size particles on the first three deck sections, and fewer on the last two sections, compared to the circular or elliptical modes.