三流板坯非对称中间包内腔结构优化的数值模拟
Study on numerical simulation of control device optimization in the asymmetric tundish for three-strands slab casting
倪赛珍1
作者信息
- 1. 中冶南方连铸工程技术有限责任公司研究院,湖北武汉 430073
- 折叠
摘要
以某钢厂新设计的三流板坯非对称中间包结构为基础,通过改变其中挡渣墙的设计形式得到不同的中间包内腔设计方案.然后利用商业CFD软件Fluent数值模拟计算不同设计方案下中间包内钢液的流动特性和温度场分布,采用"刺激-响应"的方法模拟计算得到各方案下钢液在中间包内的RTD曲线.通过对各方案下时间特征量的比较分析,同时比较了夹杂物上浮的情况,得到最优的内腔结构设计.分析结果表明,采用斜挡渣墙的方案2得到的流场最佳,该方案下各水口钢液平均停留时间的标准差最小,为19.19 s,夹杂物上浮的概率也最大,对于直径100μm的夹杂物颗粒,上浮概率为94％.
Abstract
Based on the newly designed three-strands slab asymmetric tundish structure of a steel plant,different de-sign schemes for the inner structure of the tundish were obtained by changing the design form of the slag retaining wall.Then,the commercial CFD software Fluent was used to numerically simulate the flow characteristics and tem-perature field distribution of molten steel in the tundish under different design schemes.The"stimulus response"method was used to simulate and calculate the RTD curves of molten steel in the tundish under each scheme.By comparing and analyzing the time characteristics of various schemes and comparing the situation of inclusions float-ing up,the optimal internal cavity structure design was obtained.The analysis results show that Scheme 2 using in-clined slag retaining walls achieves the best flow field.Under this scheme,the standard deviation of the average res-idence time of the molten steel at each nozzle is the smallest,the value is 19.19 s,and the probability of inclusions floating is also the highest,for inclusion particles with a diameter of 100 μm,the floating probability is 94％.
关键词
三流板坯/异型中间包/RTD曲线/流场/温度场/结构优化/数值模拟Key words
three-strand/abnormal tundish/RTD curve/flow field/temperature field/structure optimization/nu-merical simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据