Simulation of ball motion and energy transfer in a planetary ball mill |
| |
Authors: | Lu Sheng-Yong Mao Qiong-Jing Peng Zheng Li Xiao-Dong Yan Jian-Hua |
| |
Institution: | a State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering of Zhejiang University, Hangzhou 310027, China;b Foreign Economic Cooperation Office, Ministry of Environmental Protection ofPeople's Republic of China, Beijing 100035, China |
| |
Abstract: | A kinetic model is proposed for simulating the trajectory of a single milling ball in a planetary ball mill, and a model is also proposed for simulating the local energy transfer during the ball milling process under no-slip condition. Based on the kinematics of ball motion, the collision frequency and power are described and the normal impact forces and effective power are derived from analyses of collision geometry. The Hertzian impact theory is applied to formulate these models, after having established some relationships among geometric, dynamic, and thermophysical parameters. Simulation is carried out based on two models, and the effects of the rotation velocity of the planetary disk Ω and the vial-to-disk speed ratio ω/ Ω on other kinetic parameters have been investigated. As a result, the optimal ratio ω/Ω to obtain high impact energy in the standard operating condition at Ω =800 rpm is estimated, which is equal to 1.15. |
| |
Keywords: | ball motion energy transfer kinetic model milling ball |
本文献已被 CNKI 维普 等数据库收录! |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |
|