摘要
中间包内钢液的流动与温度直接决定其冶金效果。铸坯断面越大,中间包流间距也越大,其中各流钢液的冶金效果差异也越大。以某钢厂可生产直径不小于1200 mm的特大断面圆坯三流非对称中间包为研究对象,针对其特大流间距中间包所导致的各流铸坯质量一致性较差问题,通过水力学物理模拟和热流体数值模拟相结合的方法研究不同挡墙结构和挡坝组合下中间包内钢水的流动行为、温度分布及夹杂物去除行为。结果表明,与原型结构相比,在1号和3号水口附近设置挡坝,并采用U型挡墙结构的方案,可以有效改善原型包的2号出口短路流问题,可使死区比例降低15.84%,平均停留时间标准差下降107.1 s,三流水口间最大温差降低至0.5 K,各流浇铸温度一致性显著提高,且夹杂物平均去除率提高了10.86%。合理的控流结构可以显著改善特大断面圆坯连铸用非对称三流中间包的综合冶金效果。
The fluid flow and temperature of molten steel in tundish play a key role in its metallurgical performance,in which the difference between each strand will be magnified due to increasing strand spacing for the production of large-sized casting formats.A three-strand asymmetric tundish used for producing super large section round blooms with diameters over 1200 mm in a steel plant was focused on.Aiming at the poor consistency of each strand caused by the large strand spacing,the flow behavior,temperature distribution and inclusion removal behavior of molten steel in the tundish with different retaining wall structures and dam combinations were studied by physical and numerical simulation.The results show that the short-circuit flow at out 2 of the prototype tundish can be effectively improved by setting U-shaped retaining walls and dams near strands No.1 and No.3 as compared with the prototype structure,and the ratio of dead zone can be reduced by 15.84%,and the standard deviation of mean residence time can be reduced by 107.1 s,and the maximum temperature difference can be decreased to 0.5 K,and the consistency of each strand can be improved significantly,and the average removal rate of inclusions increased by 10.86%.Thus,the optimized structure proposed in this study effectively enhances the steady-state metallurgical behavior of the asymmetric three-strand tundish utilized in continuous casting of super large cross-section round blooms,thereby improving its overall metallurgical.
作者
白云
冯文文
陈希青
肖红
王璞
张家泉
BAI Yun;FENG Wenwen;CHEN Xiqing;XIAO Hong;WANG Pu;ZHANG Jiaquan(Jiangyin Xingcheng Special Steel Co.,Ltd.,Jiangyin 214429,Jiangsu,China;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Magnetoelectric Research Institute,Hunan Zhongke Electric Co.,Ltd.,Yueyang 414000,Hunan,China)
出处
《连铸》
北大核心
2025年第3期80-90,共11页
Continuous Casting
基金
湖南省科技人才托举工程资助项目(2023TJ-Z14)。
关键词
特大圆坯连铸
非对称中间包
数值模拟
物理模拟
结构优化
夹杂物去除
super large round bloom casting
asymmetric tundish
numerical simulation
physical simulation
structural optimization
inclusions removal
