Efficiency and quality of industrial classification
Pneumatic classification

If we consider a pneumatic classification operation (figure 1) with :

• M, M_g and M_f the mass flow rates of separator feed, coarse product and fine product respectively;

• is the size of the particle ;

• F (a), F_g (a) and F_f (a) the cumulative distributions of a-dimensional particles in the feed, coarse product and fine product respectively; the differential dF /da describes the statistical weight represented by a-dimensional particles.

The general mass balance equation and the equation for a-dimensional particles are written as :