Experimental Study on the Grinding Rate Constant of a Ball Mill: Effects of Feed Size and Ball Diameter [Translated]†

Abstract

The grinding rate constant is one of the important factors needed to measure or evaluate a grinding process. It has been found that the decreasing rate of the feed size is described by a first-order equation in the initial grinding stage of various mill types. In this study we conducted grinding tests on silica glass using a ball mill, and measured the grinding rate constant of the feed size decrease. We investigated the effects of ball diameter and feed size on the rate constant when the ball mass, feed mass, and the mill's rotational speed were constant. The results indicated that the grinding rate constant can be expressed by modifying the equation that was proposed by Snow as the function of ball diameter and feed size.† This report was originally printed in J. Soc. Powder Technology, Japan. 35(1), 12-17 (1998) in Japanese, before being translated into English by KONA Editorial Committee with the permission of the editorial committee of the Soc. Powder Technology, Japan.