Abstract
Power requirement for mixing powders in a rotary vessel type mixer has been analyzed by introducing a simplified model, which regards the vessel shape of the three dimension as that of two dimension. The total force exerted on the mixer's shaft by the charged powders is assumed to be the sum of; (i) the gravitational force by the powders bed, (ii) the inertia force for accelerating the powders mass, and (iii) the frictional force acting between the powders bed and the inside wall of the mixer.
Horizontal drum, twin shell (V) and double cones type mixer are used in this work.
Power equations were obtained as the function of the operating conditions, the propertied of the powders and the dimension of the mixers. An agreement within an accuracy of ±20% was obtained between the measured power and the one calculated by these equations.
