13 全幅一段电磁制动连铸结晶器内钢液的模拟研究.pdfVIP

全幅一段电磁制动连铸结晶器内钢液的模拟研究 李菲 王恩刚 冯明杰 (东北大学材料电磁过程研究教育部重点实验室，沈阳 110819) 摘要 基于全幅一段电磁制动技术，模拟研究了条形磁极距离水口稍远时结晶器内钢液的情况。利用ANSYS 软件建立描述全 幅一段电磁制动连铸过程磁场模型，经过求解得到结晶器内钢液中磁感应强度分布，然后利用FLUENT 软件计算得到全幅一 段电磁制动结晶器内钢液的流动情况。结果表明：全幅一段电磁制动装置可以在钢液中产生恒定有效的磁场，磁感应强度主 要集中于制动器磁极覆盖区域；全幅一段电磁制动能够减小结晶器内下回流区流速，促进下回流区涡心上移，减弱钢液射流 对结晶器窄面的冲击强度；本论文模拟参数条件下，全幅一段电磁制动会引起自由液面流速的增加，这是因为全幅一段电磁 制动的磁极距离水口的距离较远造成的，为优化操作参数提供了理论依据。 关键词 电磁制动 磁场 流场 模拟 Simulation of Molten Steel in Continuous Casting Mold with EMBr-Ruler Li Fei Wang Engang Feng Mingjie (Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education, Northeastern University, Shenyang, 110819, China) Abstract When the strip magnetic poles were farther away from the outlet, simulation and study of molten steel in mold was carried on based on the EMBr-Ruler technology. The magnetic model which described the electromagnetic brake continuous casting process with EMBr-Ruler was established by ANSYS software and got the magnetic flux density distribution of molten steel in mold after solving. Then the flow field of molten steel in mold with EMBr-Ruler was calculated by FLUENT software. The results showed that the EMBr-Ruler device can generate constant effective magnetic field in the molten steel, and the magnetic flux density mainly concentrated on the electromagnetic brake poles coverage area. The EMBr-Ruler can reduce the flow velocity of lower reflux region in mold and promote the vortex center of lower reflux region moving up. It also weakened impact strength of liquid steel jet on narrow face of mold. Under the operating parameters in this paper, the electromagnetic brake process with EMBr-Ruler may increase free surface velocity. This was because the magnetic poles of electromagnetic brake device far away