Classification of Particles of the Same Densityin Liquid-Solid Fluidized Beds

Abstract

Glass beads and crushed glass particles of diameters ranging from 1.0 to 5.0 mm were fluidized with tap water. The bed was initially fluidized completely, and then the liquid velocity was gradually decreased to obtain a fixed bed. The relationships of relative particle diameter ratios with the relative heights of the sampling sections in the beds were obtained at 7 mm height intervals. With respect to binary systems of glass beads, good size classification was accomplished at the size ratio of 1.10. This size ratio is much smaller than the widely accepted critical size ratio of 1.30 for classification in liquid fluidization. For a multicomponent system of crushed glass, the continuous classification of various size ranges was observed.
Inclination of the fluidized column had a great adverse effect of the size segregation.