Simulation of Free Surface in a Continuous Casting Mould and Structural Optimization of a Submerged Entry Nozzle

By taking a continuous casting mould for rectangular slab production in a certain steel mill as the research subject,flow and flow fields of the free surface were systematically analyzed,flow conditions affected by different exit area ratio,immersion depth,and inclination of the submerged entry nozzle(SEN) were studied,and corresponding process parameters were optimized through numerical and physical simulation.Results show that for the rectangular slab with a 150 mm×440 mm section,the optimum exit area ratio,inner diameter and side opening angle of the SEN should be 2.42,30 mm and 25° respectively.