A microlevel-based characterization of granulation phenomena

The Status of Population Balances

Agglomeration during precipitation: agglomeration mechanism identification for Al(OH)3 crystals in stirred caustic aluminate solutions

Publisher Summary The spheroidal ensemble of particles is called a granule, ball, pellet, or an agglomerate. Nucleation, compaction, size enlargement, and spheroidization of the pellets take place in the course of balling and granulation and related agglomeration processes. Depending on the nature of the pelletizing system, the sequence of the last three actions may occur in different orders and with extensive overlapping, as indeed happens in most instances. Dry pelletization refers to the agglomeration of finely divided moisture-free powder into dense free-flowing spheroids. The formation of granules from finely divided solids in liquid suspension in the presence of a small amount of a second immiscible liquid, which preferentially wets the solid, is known as spherical agglomeration. Many chemical, ceramic, metallurgical, nuclear, and pharmaceutical industries are concerned with the processing of finely divided solids and find it advantageous, or even necessary, to carry out size enlargement by some method of agglomeration. Balling and granulation has proved to be a highly versatile technique for large-scale production of particulate spheroids at relatively low capital and operational costs..

T.E. Ramabhadran

Papers

On the general theory of solid granulation

Self-preserving theory of particulate systems