Abstract
AbstractAn experimental study was conducted to examine the flow of slightly settling slurries in a horizontal rotary drum. The effects of the slurry flow rate, feed solids concentration, particle settling velocity and drum rotational speed on the hold‐up solids concentration were investigated.At low drum speeds, the hold‐up solids concentration was much higher than that of the feed. However, at higher drum speeds, the hold‐up solids concentration approached that in the feed. At a given drum speed, the hold‐up solids concentration was found to vary linearly with the feed solids concentration. A semi‐empirical correlation was developed to predict the hold‐up solids concentration using the drum Froude number, the single particle drag coefficient and a dimensionless slurry feed rate.
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