The Effects of Silica Sand Particle Size on Drying Using a Vertical Fluid Bed Dryer

Abstract

The experimental and theoretical relationships of silica sand particle size and drying was compared to predict the minimum fluidization rate in drying at 9.57% moisture. The drying temperature (90°C, 120°C, and 150°C) and particle size (274 ± 0.5 µm, 563 ± 0.5 µm, and 910 ± 0.5 µm) parameters were studied as factors influencing the drying process in the experiment. Upon comparing all the test results, it was found that moisture loss accelerated as drying temperature of the silica sand samples increased. On the other hand, the minimum fluidization rate was found to have varied directly with particle size, in addition to being inversely proportional to temperature. Moreover, it was observed that pressure increased with increasing particle diameter and reduced with decreasing temperature.