Screening of Particles by Packed Fluidized Particle Classifier

Abstract

Nonuniform size particles are fed to the middle part of a tower packed with open-end screen packing and are classified into two parts by air flowing upward in the tower. This apparatus is defined as a packed fluidized particle classifier. The characteristics of particle classification are expressed by the fractional recovery curve of the particles. By obtaining fractional recovery curves for particle groups of different size, we found that the characteristics of particle classification of this apparatus were much better than those of centrifugal or gravitational particle classifiers. The fractional recovery curve of particles in this apparatus can be estimated from its operating conditions by establishing experimentally the relation between the fractional recovery curve of particles and the distribution function of gas flow in the apparatus.