Some Studies on a Rectangular Type Thickener.

Abstract

In designing continuous thickeners, the concentration gradient of slurry in the thickeners is assumed to be kept horizontally constant, in any place, but vertically changed. To confirm the propriety of this assumption, we carried out an experiment with magnesium hydrate slurry in a rectangular type thickener in an industrial scale and the following results were obtained.
(1) Slurry fed in the thickener settles down forming socalled density flow through clear liquid zone and spreads over the stagnant slurry level. By this density flow the return flow towards the feed launder is traced in clear liquid zone.
(2) The concentration gradient is dept each definite value at various depths throughout the area of the thickener.