回転容器式混合機内の密度の異なる粒子の偏析現象
1978 年 15 巻 12 号 p. 595-603
詳細
1978 年 15 巻 12 号 p. 595-603
The mixing of particles with different density is generally accompanied by segregation which prevents the particles from attaining the randomly mixed state. Theory of stady-state Markov chain was applied to describe the vertical segregation of solid particles in a tumbling mixer. The transtion probabilities in the vertical direction were determined by use of a particle-tracing method. Based on these transition probabilities, the concentration profiles, the concentration variances, and the equilibrium states of the density-different particles were simulated with the aid of a digital computer. The calculated results were in good agreement with the exprimental ones.
It was found that for the same size particles, the heavier particles concentrated in the central zone of the mixture, while the lighter ones segregated neighborhood of the surface layer, and the bottom of the mixture.
