Abstract
The mechanism for the granulation and coating with a rotary disk and an agitator equipped in a fluidized-bed granulator was examined. With this granulator, the two rotating revolvers give a densely agglomerated product. Which is considered to result from their large shear stress. No growth of coarse particles occurred during granulation and coating when the two revolvers inversely rotate; fine particles were not produced under the above mentioned operating condition. In the present study, an image analyzer was used to measure the particle size distribution of the agglomerates. The image analyzer was useful for the precise observation of particle growth with the lapse of time.
