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Percolation Segregation of Binary Mixtures for Varying Intensity of Motion Conditions

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2007 ASAE Annual Meeting  074030.(doi:10.13031/2013.23256)
Authors:   Anjani K Jha, Jaskaran S Gill, Virendra M Puri
Keywords:   Key words: Primary segregation shear cell (PSSC-II), size ratio, coarse particle, fine particles, strain rate, potash, segregation rate, and normalized segregation rate

Abstract Three strain rates of 1.0 Hz, 0.5 Hz, and 0.25 Hz were selected for studying percolation segregation in binary mixtures of potash. Binary mixed samples prepared from three mean coarse sizes with their corresponding three fines sizes for potash. Herein, three coarse mean sizes 3,675 µm, 3,075 µm, and 2,580 µm and three mean fines sizes 2,180 µm, 1,850 µm, and 1,550 µm were selected for tests. Percolation segregation in binary mixed sample was quantified using the primary segregation shear cell (PSSC-II). Based on experimental results, the segregated fines mass, normalized segregation rate (NSR) and segregation rate of fines for binary mixtures increased with increasing strain rate from 0.25 Hz to 1.0 Hz. The NSR decreased with decreasing strain rate from 1.0 Hz>0.5 Hz>0.25 Hz for size ratios 1.7, 2.0, and 2.4 (p<0.05). At these three strain rates, for size ratio 2.0, the NSR of coarse size 3,675 µm with fines size 1,850 µm was smaller than the NSR of coarse size 3,075 µm with fines size 1,550 µm in the binary mixtures (p<0.05).

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