The Characteristics of granulation of fine powders have been investigated by using a rotary-vessel-type mixer with rocking motion. The liquid as a binder is introduced into the mixer maintaining its inclination by means of ball bearings mounted on the inlet cover. A scraper and an impeller-type chopper are installed in the vessel to prevent the powder from sticking and to disintegrate the coarser agglomerates into the desired size range. The interior construction and operating conditions for granulation have been discussed based on the yield, size and size distributions of the granules. It is found that the granule formed by this mixer was relatively highly porous and soft.
