Segregation of Solid Particles in a Horizontal Drum Mixer

Abstract

The theory of Semi-Markovian Process is applicable to the transverse mixing-demixing of solid particles in a horizontal drum mixer. The motion of solid particles can be characterized by the transition probabilities in the radial direction and the circulation time distribution. These characteristic factors were determined experimentally for several kinds of spherical particles.
Based on these factors, the spatial distribution of tracer particles in the equilibrium mixture was obtained theoretically and was transformed into the concentration distribution.
The results for two constituents of different densities showed that lighter particles have a tendency to segregate toward the outer side of the circulating flow, while heavier ones have a tendency to concentrate in the neighbourhood of the stagnant point.