The effect of inclination of submerged nozzle -7°~-11° with casting speed 0.9m/min on shell thickness

shell temperature and free surface flow in mold for 220mm x 1600mm slab has been studied by numerical simulation method. The simulation and application results show that taking liquid steel flow with casting speed 0.8m/min and inclination of nozzle -15° as criterion and compared calculation results with criterion process curves the optimizing process scheme is nozzle inclination -11° with casting speed 0.9m/min. Commercial production application results show that after using the optimization process the mold narrow face alarm rate of recurrence per month from 15 times to 0 time and the quality of cast slab surface has definite improvement.