TY JOUR TI THE STUDY OF DEHYDRATION OF COLEMANITE IN NON-ISOTHERMAL CONDITIONS KW colemanite KW dehydration KW non-isothermal conditions KW activation energy KW endothermic effects KW kinetic equation JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Bessmertnyy, V.S. AU Bondarenko, M.A. AU Puchka, O.V. AU Cherkasov, A.V. AU Izotova, I.A. AU Bragina, V.S. AU Platov, Y.T. AU Bragina, L.L. PY 2021 IS 6 PB Belgorod State Technological University named after V.G. Shukhov