G0500-6-6 準剛体回転流を用いた単段分級方式における高流量化に伴う精度変化の実験的考察([G0500-6]流体工学部門一般講演(6))

Abstract

In a single-stage classification system using an almost rigidly flow in which small feed-powder particles suspended in a liquid medium with a low mass-concentration are accurately classified into fine and coarse products by the difference in centrifugal force and fluid drag acting on each particle due to the particle-size difference, with the aim of considering the change in accuracy with increasing flow-rate, we have conducted classification experiments, keeping the centrifugal-effect parameter constant to hold the cut size constant. With increasing Rossby number (flow rate) by decreasing Ekman number (by increasing rotation rate), the cut size scarcely changes and the classification accuracy is more improved. This is due to decreasing Ekman number. With increasing Rossby number further, however, the accuracy decreases drastically. Corresponding to this fact, the flow state of the classification field changes definitely.