Effect of viscosity on the porosity of granular materials in the moving bed washing process

RODRIGUEZ, L.; HOFFNER, B.; STAHL, W.; PEREZ, R.; GOMEZ, L.; ARTEAGA, L.:
Afinidad, 71:767 (2014) 214 – 218.

Abstract

Washing processes are characterized by the replacement of the initial liquids by another liquid — the wash liquid. The experimental studies have been conducted with lab sedimentation equipment. The porosity of the moving bed increases with the average vertical velocity of the moving bed at a fixed width of the wash chamber. The experimental results show that the porosity values in the moving bed for both fractions of quartz sand used with the viscosity ratio ranging from 4 to 1/15 are slightly higher in respect to the values of the moving bed with h*= 1. The differences are in the range of 3-5 % at the chosen conditions.

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