Study on the Method of Dividing Media Motion Region in Ball Milling

doi:10.3901/JME.2020.23.212

Abstract

Abstract: The motion morphology of grinding media has an important effect on particles breakage efficiency in ball milling. In order to reveal the broken way and effective broken region when the motion morphology changes in different milling conditions, research on the regional division of the motion morphology of grinding media has been conducted. The theoretical dividing method is too ideal and less application, while the experimental tracking method costs too much time and money. Therefore, a new method of dividing the media motion morphology regions using EDEM grid partition has been proposed. The location function for each grid which is divided from the cross-section of the mill is obtained by the numerical statistics, combined with the regional distributions of media velocity vectors and collision characteristics, the regional distribution examples in three different milling condition, including rotational motion, spiral motion and coupled flutter motion have been provided. The comparison result with the experimental tracking method has verified the validity and availability of the EDEM grid partition method. In the end, the grinding test has been conducted, and the particles' broken way and effective broken region imposed by the media motion morphology has been discussed according to the particles broken effect and broken rate. This conclusion provides a fast and effective method to study and optimize the region changes in different influence factors.

Key words: grinding media motion morphology, EDEM grid partition method, particles' velocity and collision region, crashed rate, productivity of fine particles

CLC Number:

TD453

LIANG Man, SUN Weihong, SUN Yi, XIANG Jingcheng. Study on the Method of Dividing Media Motion Region in Ball Milling[J]. Journal of Mechanical Engineering, 2020, 56(23): 212-225.

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