TY JOUR TI DEVELOPMENT OF THE DESIGN AND CHECKING THE PERFORMANCE OF AN IMPROVED MODEL OF A CATAPULT FOR OPENING A LADLE KW metallurgical ladle KW steel casting KW slide gate system KW ladle filler sands KW catapult KW physical model JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Ponamaryova, E.A. PY 2025 IS 10 PB Belgorod State Technological University named after V.G. Shukhov