摘要
本文通过对离心磨粉磨石英和氧化铝后,磨样的粒度测定,对离心磨粉磨动力学进行了研究。研究结果表明该种磨机粉磨过程基本符合传统粉磨速度方程Rdt=Rdtexp(-k_f·t~′)。但常数K_f和n′与粒径d存在幂函数关系。粉磨产品粒度在大于2μm时其分布符合R-R分布,小于2μm时,比R-R分布所表示的该粒级筛下量少。研究认为对于离心磨这种超细粉磨设备减小颗粒的粘附力可明显提高磨机效率。
The grinding dynamics in a centrifugal mill was studied by way of the size analyses of the ground quarts and Al_2O_3 products. As the results show, the grinding process in this mill is mainly in comformity with the conventional grinding rate equation R_(dt)=R_(dt).exp (-K_f·t^(n')), with the constants K_f and n' bearing exponential relations to the particle size d. The product sizes coincide with the R-R distribution when the sizes are above 2 microns. But the quantity of products with sizes below 2 microns is smaller than that demonstrated by this distribution. The research suggests that the reducing adhesion between particles may greatly improve the grinding efficiency of the super-fine grinding apparatus of this kind.
关键词
离心磨
粉磨速率
粒度分布
动力学
硅酸盐
centrifugal mill, grinding rate, particle size distribution
