TY JOUR TI ADVANTAGE OF RECOVERY THE DOUBLE-BALL GRINDING MEDIA IN THE SECOND CHAMBER OF THE MILL OPEN CYCLE IN CONTRAST TO TRADITIONAL ASSORTIMENT OF GRINDING MEDIAS KW grinding of clinker KW cement mill KW grain size composition KW cylpebs KW dispersed characteristics JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Borisov, I.N. AU Stronin, A.A. AU Klassen, V.K. PY 2020 IS 4 PB Belgorod State Technological University named after V.G. Shukhov