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Simulation Research of Flow Field in Continuous Casting Mold with Vertical Electromagnetic Brake

机译：垂直电磁制动连铸结晶器流场的仿真研究

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摘要

The narrow face of continuous casting mold is the first impact region of the jet from the submerged entry nozzle (SEN), and against the characteristic a new pattern of electromagnetic brake device is proposed, which is called Vertical Electromagnetic Brake (V-EMBr) and its magnetic poles can cover the free surface and the frontier region of solidified shell. The effect laws of magnetic flux density, casting speed and the submergence depth of the SEN on flow field in mold with V-EMBr are investigated by numerical simulation method. The results show that with the magnetic flux density increasing, inhibitory effect of electromagnetic force on molten steel from SEN is increased gradually, impact strength of molten steel stream on narrow face is weakened gradually, the vortex center of lower recirculation zone is moved up gradually and the flow velocity of free surface is decreased gradually. These can reduce the fluctuations of free surface and chance of slag effectively, suppress impinging depth of molten steel in lower recirculation zone and float air bubbles and inclusions beneficially. In addition, the V-EMBr technology can also be applied to different casting speed and different submergence depth of the SEN in continuous casting process. The significantly metallurgical effects and flexibility of application range which are generated by V-EMBr is in line with the original intention of the V-EMBr design.
机译：连铸结晶器的窄面是浸入式喷嘴（SEN）射流的第一个冲击区域，针对此特性，提出了一种新型的电磁制动装置，称为垂直电磁制动（V-EMBr）和它的磁极可以覆盖凝固壳的自由表面和边界区域。通过数值模拟的方法，研究了V-EMBr对模具中流场的磁通密度，铸造速度和SEN的浸没深度的影响规律。结果表明，随着磁通密度的增加，电磁力对SEN产生的钢水的抑制作用逐渐增强，钢水流在窄面上的冲击强度逐渐减弱，下回流区的涡旋中心逐渐向上移动。自由表面的流速逐渐降低。这些可以有效地减少自由表面的波动和结渣的机会，抑制钢水在较低的再循环区中的撞击深度，并有益地漂浮气泡和夹杂物。此外，V-EMBr技术还可应用于连续铸造过程中不同的铸造速度和SEN的不同浸没深度。 V-EMBr产生的显着的冶金效果和应用范围的灵活性符合V-EMBr设计的初衷。

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