In management of difficult technological processes the intellectual systems of automatic control are successfully applied. Among intellectual control systems the greatest distribution was gained by indistinct control systems. For design of the indistinct regulator the mathematical model of continuous and periodic processes of enrichment of technogenic waste of the mining and metallurgical plants (MMP) is constructed. Existence of indistinct sets the dispersion of the sizes of the separated particles, difference of a form of particles of real disperse materials from spherical, change of humidity of particles seasonally demand accounting of such factors as. Besides impact change of a consumption of gas, thickness and a poroznostipsevdoozhizhenny layer, diameter of particles, density, the device sizes, etc. exerts on their values