Abstract
This chapter discusses the fluidized bed coating and granulation. Fluidized beds, both with and without internals, offer many advantages over conventional granulation and coating equipment such as pans, drums, and mixers. Fluidized beds, by virtue of the air or gas required to fluidize the solids, typically have high rates of heat and mass transfer leading to uniform temperature distribution within the bed and relatively short processing times. Moreover, the shearing forces exerted in such beds help to control the formation of agglomerates, and the movement of fluidizing gas, including bubbles, which causes solids to circulate within the equipment providing a constant flow of bed particles through the spray zone, which is essential for uniform product quality. The main goal of this chapter is to provide a technical basis or framework for analyzing fluidized bed coating and granulation operations.
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