Effect of Swirling Flow out of Nozzle on Flow Field in Continuous Casting of Billet
旋流水口对小方坯连铸结晶器流场影响的水模拟

Electromagnetic stirrer was fixed on intermediate zone of the nozzle to make molten steel outflow with swirling flow, reduce dashing depth of molten steel and form a up reversing flow. All of these were to get the mold powder melted, shell solidified and uniform composition in the continuous casting of special steel billet. This paper was to simulate the effect of electromagnetic stirring in submerged entry nozzle (SEN) through setting a swirl blade in SEN of the hydromechanics mode. This method used was to impart swirl to the flow. On the basic of this, the vertical velocity and horizon velocity of liquid level in the model were measured using Ultrasonic Doppler Velocity (UDV).The effectiveness of electromagnetic stirrer and analyzing technological parameter were examined. Following issues were obtained: (1) Swirling flow was in favor of flow field in mold. (2)The dashing depth can be reduced effectively. (3)The reversing flow and heat transmission of meniscus were enlarged. (4)The horizon circulating was formed so the activity of liquid level and the effectiveness of molten slag were increased.