TY JOUR TI OPTIMIZATION OF THE PROCESS OF PRODUCING REACTIVE ALUMINA USING A BALL MILL KW reactive alumina KW ball mill KW dry grinding KW granulometric composition KW specific surface area KW grinding intensifier KW fine powders JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Trubitsyn, M.A. AU Volovicheva, N.A. AU Doroganov, E.A. AU Doroganov, V.A. AU Kozyreva, Y.N. AU Evtushenko, E.I. AU Bondareva, I.A. AU Lisnyak, V.V. PY 2026 IS 11 PB Belgorod State Technological University named after V.G. Shukhov