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随着对连铸坯质量要求的不断提高,适当地控制钢流速度,使钢流不会由于从滑动水口(SG)和浸入式水口(SEN)接口四周吸入空气而致使钢流飘移或钢液发生二次氧化便显得相当重要。在本项研究中,已研制出一种新方法来阻止在钢流速度控制期间,空气从SG和SEN之间接口处四周吸人。就是在SEN上制作一台阶,该台阶对阻止空气吸入的作用如下: (1)挤压通过SG的钢流正好在SEN前端的台阶处突然转向,当逆流通向SG和SEN之间的接口处时,它的动能被转换成压能,起到一个类似气流碰撞的作用,在接缝处形成正压气体。
With the continuous improvement of the quality requirements of the continuous casting slab, the steel flow rate is controlled appropriately so that the steel flow will not drift due to the air flow or the liquid steel due to air suction around the sliding port (SG) and the immersed nozzle (SEN) Secondary oxidation occurs it is very important. In this study, a new method has been developed to prevent air entrainment around the interface between SG and SEN during steel flow rate control. The effect of this step on preventing air aspiration is as follows: (1) The steel flow squeezing through the SG happens to steer right at the step at the front of the SEN, and when the countercurrent leads to the interface between the SG and the SEN When its kinetic energy is converted into pressure energy, play a role similar to the impact of the air flow in the joints to form a positive pressure gas.