Physical Simulation and Optimization of Submerged Entry Nozzle Used for Rectangular Bloom

In order to solve the problems of slag inclusion,bulging and sticker breakout on the 165 mm×280 mm rectangular bloom in a steel work,the structure forms of submerged nozzle and processing parameters are optimized by means of simulating experiment.The optimization of parameter includes submerged depth of the nozzle,tilted angle of the nozzle port,and area ratio of nozzle port and nozzle section.The results of the simulation experiment show that various nozzle parameters have different effect on the fluid flow behaviour.The single outlet SEN used at present is the sticking point of problem in production process.A two side outlet SEN 9^# and a four side outlet SEN 42^# adapted to 165mm×280mm rectangular bloom are optimized.