ジェットミル粉砕プロセスにおける粒子径分布のリアルタイムモニター

The optimum parameters for grindings by a jet mill is determined by many experiments, changing parameters, such as the feeding speed, the inlet pressure, and measure the particle size distribution of the corrected powder. This process takes long time and work load. To reduce this optimization time, in-line monitoring of the particle size distribution for the jet mill process was investigated. We could successfully monitor the particle size distribution of the ground particles, just after the jet mill process, using an in-line laser diffraction measurement system. A proportional relationship was observed between the supplying speed of the material, and the Volume based median diameter, Dv50 of the ground powder. When we changed the feed rate step by step, we could see the Dv50 value was changed with those steps.