TY JOUR TI MATHEMATICAL DESCRIPTION OF THE PROCESS OF GRINDING MATERIAL IN THE AREA OF COUNTER-INTERSECTING FLOWS IN CENTRIFUGAL COUNTERCURRENT MILL KW overlappingflows KW particlecrushing JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Semikopenko, I.A. AU Voronov, V.P. AU Gorban, T.L. PY 2017 IS 2 PB Belgorod State Technological University named after V.G. Shukhov