Granulation techniques have been developed to produce granular materials, such as all forms of granules, small compacts, coating particles, and small grains or prills, for demand application in widely differing industries. A primary objective in this review is to present a generalized accouts of the diverse granulation methods in a systematic way. In the case of size-enlargement of fine powders, there are two principal modes of granulation. One is achieved by tumbling, agitating, or fluidizing raw materials in the presence of liquid binders, and the other includes granulation processes in which materials are forced to flow in a plastic or sticky condition through dies or screens or in molds. The former is especially reviewed from a design viewpoint of granulation processes.
