Yi Bing, Zhang Guifang, Jiang Qi, Yan Peng, Feng Zhenhua, Tian Nan
Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.
Hunan Zhongke Electric Co., Ltd., Yueyang 414000, China.
Materials (Basel). 2023 Dec 8;16(24):7556. doi: 10.3390/ma16247556.
Impurity elimination in tundishes is an essential metallurgical function in continuous casting. If inclusions in a tundish cannot be effectively removed, their presence will have a serious impact on the quality of the bloom. As a result, this research investigates the locations of inclusion particles in a six-strand induction-heating tundish in depth, combining the flow, temperature, and inclusion trajectories of molten steel under electromagnetic fields. The results show that a pinch effect occurred in the induction-heating tundish, and a rotating magnetic field formed in the channel, with a maximum value of 0.158 T. The electromagnetic force was directed toward the center of the axis, and its numerical distribution corresponds to the magnetic flux density distribution, with a maximum value of 2.11 × 10 N/m. The inclusion particles' movement speed accelerated as the molten steel's temperature rose, and their distribution in the channel was identical to the rotating flow field distribution. When the steel's temperature rose from 1750 K to 1850 K, the removal percentage of inclusion particles in the discharge chamber rose by 9.20%, the removal rate at the outlet decreased from 8.00% to 3.00%, and the adhesion percentage of inclusion particles in the channel decreased from 48.40% to 44.40%.
中间包中的杂质去除是连铸过程中一项至关重要的冶金功能。如果中间包中的夹杂物不能被有效去除，它们的存在将对铸坯质量产生严重影响。因此，本研究深入探究了六流感应加热中间包中夹杂物颗粒的位置，结合了电磁场作用下钢水的流动、温度和夹杂物轨迹。结果表明，感应加热中间包中出现了箍缩效应，通道内形成了旋转磁场，最大值为0.158T。电磁力指向轴心，其数值分布与磁通密度分布相对应，最大值为2.11×10N/m。夹杂物颗粒的运动速度随着钢水温度的升高而加快，其在通道内的分布与旋转流场分布一致。当钢水温度从1750K升至1850K时，出料室中夹杂物颗粒的去除率提高了9.20%，出口处的去除率从8.00%降至3.00%，通道内夹杂物颗粒的附着率从48.40%降至44.40%。
