Numerical Study of Collision and Penetration Behavior Between Particles and Screen Plate

作     者：JIAO Hong-guang ZHAO Yue-min WANG Quan-qiang 

作者机构：School of Material Science and Engineering Henan Polytechnic University Jiaozuo Henan 454003 China School of Chemical Engineering and Technology China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China 

出 版 物：《Journal of China University of Mining and Technology》 (中国矿业大学学报（英文版）)

年 卷 期：2006年第16卷第2期

页      面：137-140,146页

核心收录：

学科分类：081902[工学-矿物加工工程] 0819[工学-矿业工程] 08[工学] 

基　　金：Projects 50025411 supported by the China National Science Foundation for Distinguished Young Scholars 92010035 by National Natural Science Foun-dation of China 20030290015 by the Specific Research Foundation for Doctor Discipline of Colleges and Universities 

主　　题：screening numerical simulation particle motion collision 

摘      要：For a screening process, the collision and penetration phenomena between particles and screen plate is standard behavior and with collision the mechanical energy of the vibrating screen can be transmitted to the feed. In order to recognize further the collision process and the law of penetrating motion, with the spring-dashpot-slider contact model of the distinct element method （DEM）, a mathematical model which can describe the collision process has been established and a program for simulating the motion of a single particle on the screen plate developed by VC＋＋. NET. To evaluate the handling capacity of the screen that deals with difficult screening material, an instantaneous penetrating coefficient is defined. The moving period of the screen plate is divided into four stages. By analyzing the state of contact collision at each stage, it is pointed out that the collision ranging from 3π/2 to 2π period is the most favorable aperture for penetration of particles, while the collision ranging from π/2 to n period is the most unfavorable. The numerical simulation result further indicates that increasing the amplitude of the screen plate has a much greater effect on the augmentation of instantaneous penetration coefficient than increasing the vibration frequency.