"The method of removal of fine fraction from a polydisperse granular layer is experimentally investigated in order to increase its uniformity on the sizes of particles. This method is based on the earlier found out unusual effect consist in moving down the cylinder (tube) in fluidization layer; then inside the cylinder, the conditions for intensive pneumotransport of a firm phase are created. Consequently, the height, on which the disperse environment inside a tube rises, exceeds height of fluidization layer. Distinguishing feature of this method is absence of environmental contamination (a layer where of the fine fraction leaves is slightly motionless), and also is far less power consumption as energy is not spent on removal and transportation of minor particles, energy is spent only on minimal fluidization removal from a layer of fraction."