ball mill montmorillonite grain Ball Mill Montmorillonite Grain Recently Zhuang et al 2015 have studied on modification of Ca 2 montmorillonite Ca Mt with anionic and nonionic surfactants by using ball milling in a planetary ball mill at 500 rpm 5 to 1 ball to materials and this technique was also found to be helpful in ball mill montmorillonite grain Grinding Mill A ball mill a type of grinder is a cylindrical device