Abstract
AbstractRadial and axial segregation occur in rotary reactors such as kilns, driers, mixers, blenders and ball mills as a result of differences in the size, shape and density of the feed or product. Segregation may also be influenced by design and operating variables of the reactors. Segregation of granular solids and powers often leads to unacceptable product quality and/or poor process efficiency. Understanding the effect of material, design and operating variables is an important step in engineering de-segregation.This paper presents some observations of radial segregation due to size differences of irregularly shaped particulate solids in horizontal rotating cylinders. The kinetics of radial segregation is shown to be zero order for slumping and rolling beds and the rate of segregation is directly proportional to rotational speed and independent of bed depth and percent fines. Additionally, the larger the difference in particle size, the faster the normalized rate of segregation. The scale-up criteria...
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