中间包等离子加热的物理模拟  

Physical simulation of tundish heated by plasma

作　　者：王勇[1,2] 赵梦静 杨树峰[1,2] 李京社[1,2] 张贯旭 习小军 WANG Yong;ZHAO Meng-jing;YANG Shu-feng;LI Jing-she;ZHANG Guan-xu;XI Xiao-Jun(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials,Beijing 100083,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]北京科技大学高端金属材料特种熔炼与制备北京市重点实验室,北京100083

出　　处：《工程科学学报》2020年第S01期68-75,共8页Chinese Journal of Engineering

基　　金：国家自然科学基金资助项目(52074030,51734003)。

摘　　要：为了提高实际生产中中间包等离子加热热效率,改善中间包内钢液流动状态,本文根据某钢厂中间包原型,通过物理模拟对比研究了有无等离子加热和不同等离子加热位置下中间包内温度场和流场的变化情况.研究结果表明,在无等离子加热条件下,中间包内死区比例较高,达到了36%,死区主要集中在中间包挡墙外侧上部区域;当加热位置位于挡墙外侧时,中间包内死区比例与不加热时相差不大,靠近加热位置处的温度急剧上升,挡墙内外两侧的温度差较大,中间包内整体温度分布不均匀;加热位置位于挡墙内侧时,中间包死区比例明显降低,达到29.2%,平均停留时间约增加57 s,出水口温度明显上升(约7℃),中间包内温度分布更均匀.This study proposes a model to increase the heating efficiency of tundish plasma heating and improve the flow of molten steel in a tundish during production.A physical model was simulated based on the tundish prototype of a steel plant,and the temperature field and flow field of molten steel in the tundish with and without plasma heating at different plasma heating positions were analyzed.The research results showed that in the tundish without plasma heating,the proportion of the dead zone was high,reaching 36%.Moreover,the dead zone was mainly concentrated in the upper area outside the weir in the tundish.When the heating position was located outside the weir,it was found that there was little difference in the proportion of the dead zone between the tundish with and without plasma heating.The temperature near the heating position increased sharply,and the temperature difference of molten metal between the inside and outside of the weir was large.Moreover,the overall temperature distribution in the tundish was not uniform.When the heating position was located inside the weir,the proportion of the dead zone significantly decreased,reaching 29.2%.Further,the average residence time increased by about 57 s.The temperature of the outlet of the tundish increased significantly(about 7℃),and the temperature distribution in the tundish was uniform.

关 键 词：中间包 等离子加热 物理模拟 温度分布 死区比例 

分 类 号：TF777[冶金工程—钢铁冶金]