FIELD: drying and thermal treatment of dispersive materials. SUBSTANCE: invention can also be used for preformance of chemical reactions between gas and dispersive material. Body carries vortex generators in the form of set of coaxial rings with diameters diminishing downwards connected with their lower parts to ring vortex generator positioned beneath or to body with ring step having inclination angle of generatrix to chamber axis exceeding 20 deg. EFFECT: improved efficiency of heat-and-mass exchange processes. 4 cl, 5 dwg
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