Abstract
The dynamic characteristics of a high-speed elliptical-rotor-type powder mixer have been investigated experimentally by measuring the torque exerting on the rotation axis of the rotor during powder treatment under several operating conditions. Effects of operating conditions and powder physical properties on the dynamic characteristics of the mixer were clarified. It was indicated qualitatively that the treatment process of powder in the mixer included compression and
shear processes of powder around the clearance region which distance between the vessel wall and the rotor tip was minimum. An empirical formula of the torque including physical properties of powder, operating conditions and equipment constants was proposed, and the validity was indicated.
