ABSTRACT
Powder mixing is an operation to make two or more powder ingredients homogeneous with, if necessary, some amount of liquid. In some industrial fi elds, it is called blending. The size of the powders to be mixed ranges widely, and the states of moisture range from dry to pendular. Because solid particles are subjected to various interactive forces and are not self-diffusive, they cannot be set in motion without any external force such as mechanical agitation. Different external forces can be applied to the powders to be mixed, and many types of mixers have been developed for a variety of applications.
