TY JOUR TI INFLUENCE OF DIFFERENT ASSORTMENT OF TWO-BALL GRINDING LOAD ON THE PERFORMANCE OF AN OPEN-CYCLE BALL MILL KW clinker KW productivity KW grinding index KW two-ball grinding loading KW ball mill KW clinker dispersion characteristics JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Borisov, I.N. AU Stronin, A.A. PY 2021 IS 6 PB Belgorod State Technological University named after V.G. Shukhov