Abstract
To develop a continuous granulation process for the transformation of fine powder into the smaller and more spherical granules, the operations of granulation, grinding and separation are performed simultaneously in a continuous rotating conical vessel.
The experiments are carried out by using CaCO3-powder and water. The effect of the operating conditions on the shape of granules is investigated on the basis of a continuous granulation process model of the simultaneous operation. It can be considered, in the present model, that the shape characteristics of the final product are given by two kinds of granules differing in shape. One is more spherical granules which are made to round with the number of total cascading flow passing through the conical vessel, and the other is non-spherical ground granules the amounts of which increase with the feed ratio of the binder to the powder.
As a result, it is possible to continuously make a fine powder into smaller and more spherical granules by the above simultaneous operation under appropriate conditions of a smaller feed ratio and the larger number of the cascading flow through the conical vessel.
