Potentiality of Fine Grinding Using the Horizontal Dry Bead Mill, and Relationship between Required Power and Particle Size

Dry bead mills are believed to contribute significantly to the shortening of drying processes and reduction of required production space, as well as the energy costs reductions that result from these improvements. In this study, we used a dry bead mill to perform grinding test on silica sand, alumina, and activated carbon. We investigated the impact various dry bead mill conditions had on grinding, and explored the dry grinding potential of bead mills. We found a regular relationship between the median diameter and the power, and that this tended to match previous reports. We also demonstrated that within the scope of this experiment, tip speed, bead filling, and the feed rate were not factors that affected the energy efficiency.