粉体粘球对卧式行星磨粉磨重质碳酸钙的影响

摘要

采用小型卧式行星磨粉磨重质碳酸钙,研究粉体粘球程度随粉磨时间的变化规律以及粉体粘球对粉磨过程的影响.结果表明:重钙粉体粘球时间在7 min时达到动态平衡;粘球后,达到粉磨极限的时间由5 min延长到7 min;小于10 μ,m的成粉率从72.61％减少到66.67％;重钙的粉磨极限没有改变,极限粒径稳定在d(0.5)在3～4 μm之间.%A self-designed horizontal planetary ball mill was used to grind ground calcium carbonate.The evolution of the degree of the powder wrapping the ball versus grinding time and the effect of the powder wrapping the ball on the grinding process were studied.The results show that the ground calcuim carbonate powder wrapping the ball reaches the dynamic equilibrium in about 7 min.After powder wrapping the ball,the time to reach the grinding limit increases from 5 to 7 min,powder forming rate of less than 10 μm decreases from 72.61％ to 66.67％ while the grinding limit of the ground calcium carbonate does not change.The limit d(0.5) is between 3 and 4 μm.