抄録
In a single-stage classification system using an almost rigidly rotating flow in which very small feed-powder particles suspended in water 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 raising throughput by increasing flow rate, we have conducted classification experiments. Consequently, we have reached the following conclusions. (1) In raising throughput with increasing Rossby number by decreasing Ekman number for a constant centrifugal-effect parameter, 50% and larger-particle-side cut sizes scarcely change and smaller-particle-side ones become large, so that classification accuracy becomes better. (2) In raising throughput with increasing feed-ratio for constant values of centrifugal-effect parameter and Ekman number, 50% cut size do not change so much, smaller-particle-side cut sizes become small and, larger-particle-side cut ones tend to become large, so that classification accuracy becomes worse.
