ABSTRACT
In almost all industrial processes in which particulate materials are handled, mixtures that differ in particle properties are often subjected to relative movements. When each component (which may have the same physical properties but different chemical properties) is randomly dispersed throughout the particle bed in a microscopic sense, the result is referred to as “well mixed.” But if one of the key components congregates or is condensed locally in the macroscopic sense, it is called “segregation,” as a sort of separation phenomenon in the dense phase. The mechanisms by which mixing and segregation occur are identical in principle. In mixing, the scale of scrutiny and the partial composition are important as an index of the quality of mixing, but in segregation the location of segregated species is of main concern.
