PDF(Pubmed)
Abstract：
In order to optimize the application effect of induction heating (IH) tundishes, a four-channel IH tundish is taken as the research object. Based on numerical simulation methods, the influence of different relative placement angles of induction heaters and channels on the electromagnetic field, flow field and temperature field of the tundish is investigated. We focus on comparing the magnetic flux density (B) and electromagnetic force (EMF) distribution of the channel. The results show that regardless of the relative placement angle between the heater and the channel, the distribution of B in the central circular cross-section of the channel is eccentric. When the heater rotates around channel 1 towards the bottom of the tundish, the distribution of B in the central circular cross-section of the channel changes from a horizontal eccentricity to a vertical one. Through the analysis of the B contour in the longitudinal section of the channel, the difference in effective magnetic flux density area (ΔAB) between the upper and lower parts of the channel can be obtained, thereby quantitatively analyzing the distribution of B in this section. The distribution pattern of ΔAB is consistent with the distribution pattern of the electromagnetic force in the vertical direction (FZ) of the channel centerline. The ΔAB and FZ of channel 1 gradually increase as the heater rotates downwards, while those of channel 2 reach their maximum value at a rotation angle of 60°. Compared to the conventional placement, when the heater rotation angle is 60°, the outlet flow velocities at channel 1 and channel 2 decrease by 15% and 12%, respectively. However, the outlet temperature at channel 2 increases by 1.96 K, and the molten steel flow at the outlet of channel 1 and channel 2 no longer exhibits significant downward flow. This shows that when the heater rotation angle is 60°, it has a dual advantage. On the one hand, it is helpful to reduce the erosion of the molten steel on the channel and the bottom of the discharging chamber, and on the other hand, it can more effectively exert the heating effect of the induction heater on the molten steel in the channel. This presents a new approach to enhance the application effectiveness of IH tundish.
摘要：
为了优化感应加热(IH)中间包的应用效果,以四通道IH中间包为研究对象。基于数值模拟方法,感应加热器和通道的不同相对放置角度对电磁场的影响，研究了中间包的流场和温度场。我们专注于比较通道的磁通密度（B）和电磁力（EMF）分布。结果表明，无论加热器和通道之间的相对放置角度如何，B在通道的中心圆形横截面中的分布是偏心的。当加热器绕通道1向中间包底部旋转时，B在通道的中心圆形横截面中的分布从水平偏心变为垂直偏心。通过对通道纵截面中B轮廓的分析,可以获得通道上部和下部之间的有效磁通密度面积差（ΔAB），从而定量分析B在本节中的分布。ΔAB的分布模式与电磁力在通道中心线的垂直方向(FZ)上的分布模式一致。随着加热器向下旋转，通道1的ΔAB和FZ逐渐增加。而通道2的那些在旋转角度为60°时达到最大值。与常规放置相比，当加热器旋转角度为60°时，通道1和通道2的出口流速分别下降15%和12%，分别。然而,通道2处的出口温度增加1.96K，并且在通道1和通道2的出口处的钢水流不再表现出显著的向下流动。这表明，当加热器旋转角度为60°时，它有双重优势。一方面,有助于减少钢水对槽道和出料室底部的侵蚀，另一方面,能更有效地发挥感应加热器对槽钢的加热作用。这为提高IH中间包的应用效果提供了新的途径。
