TY JOUR TI THE MOVEMENT OF PARTICLES IN THE ACCELERATING TUBE OF THE JET MILL AT SMALL CONCENTRATION KW jet mill KW ejector KW accelerating tube KW movement equation KW dispersed particles KW compressed gas KW speed of particles KW method of tracks JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Barakovskih, D.. AU Shishkin, S.F. AU Shishkin, A.S. PY 2016 IS 1 PB Belgorod State Technological University named after V.G. Shukhov