Dispersion of aggregates of fine powder by acceleration in an air stream and its application to the evaluation of adhesion between particles

摘要

Dispersion of aggregate particles by acceleration in an air stream is examined both experimentally and theoretically. In the experiments, several kinds of powders composed of particles of around 1 μm are dispersed by a high speed air stream at the throat of an ejector type disperser. The dispersed particles are observed with an optical or electron microscope. A numerical simulation is made with aggregates of different sized spheres, comparing the dispersion force acting on each aggregate with the adhesion force between spherical particles.