ボール・ミル粉砕の速度定数 : 生成速度定数に与える供給粒径の影響

概要

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In the previous paper, the effects of hardness of samples and feed weight on the grinding rate constants were studied. In the present paper, the effect of feed size on the rate constant of undersize increase is examined. The samples used were silica glass, borosilicate glass, soda glass, quartz, feldspar, Iimestone, marble, gypsum and talc. The pebble mill consisted of a 12.8 cm-diameter by 13.2 cm-long cylinder and 40 balls of 3 cm diameter having the total weight of 1 180 g. The tests were done at the speed of 88.1% of critical one with several feed size ranges of 14〜20, 20〜28, 28〜35, 35〜48 and 48〜65 mesh. As the result, the following equation was obtained. K_x=0.024 H_<v^^->^<-0.47>・ (W_S/W_B)^<-1.5>・(x/x_f)・(x_f/x_0)^<0.7> where K_x is the zero order increasing rate constant of weight fraction less than size x, H_<v^^->^<, the dimensionless Vickers hardness, W_S, the feed weight of sample, W_B, the ball weight, x_f, the feed size, and x_0, the optimum feed size.
社団法人日本材料学会の論文
1978-10-15