摘要
通道式感应加热是近年来得到快速推广应用的中间包冶金新技术,其通道常为直通式结构。然而对于多流狭长型中间包,这种结构会造成包内各流钢水流动和温度差异大,从而影响铸坯质量的稳定性和一致性。为此,提出了一种分口通道结构,并以国内某钢厂一需要改造的6流中间包为原型,通过物理模拟方法探究了通道孔径、角度等对钢水流动的影响,且与常规直通道结构进行了对比。结果表明,分口两孔径分别为90、60 mm并配合挡坝结构的A1D方案可明显改善整个中间包的流动均匀性,各水口RTD曲线几乎重合。该结构应用于某厂重轨钢生产,铸坯质量稳定,各流钢水温差为0~3℃,取得了良好的应用效果。研究为该类中间包的结构设计提供了新的思路和方法,同时也表明传统的物理模拟方法仍可用于指导感应加热中间包的设计和优化。
The channel-type induction heating is a new technology for continuous casting tundish which has been adopted by steel plants in recent years, and its channel structure is usually straight-through. However, for the long and narrow multi-strand tundish, the flow and temperature distribution of molten steel in the tundish with this channel structure vary greatly among different strands, which affects the stability and consistency of casting billet quality. To solve this problem, a novel channel structure with bifurcated split channels was proposed, and the influence of channel hole size and its angle on the flow of molten steel was investigated by physical simulation based on a 6-strand tundish which needed to be modified in a domestic steel plant. The results were compared with the common channel structure. The results show that the flow uniformity of tundish can be significantly improved by the A1 D case which has two apertures of 90 mm and 60 mm respectively and the retaining dam structure, and the RTD curves of each strand almost coincide. The channel structure has been applied to the industrial production of heavy rail steel in the steel plant. The quality of casting billet is stable, and the temperature difference of molten steel is controlled to 0-3 ℃. This study provides a new idea and method for the structural design of induction heating tundish and shows that traditional physical modelling method can still be used to guide the design and optimization of induction heating tundish.
作者
王凯民
唐海燕
肖红
马志民
成永久
智建国
WANG Kai-min;TANG Hai-yan;XIAO Hong;MA Zhi-min;CHENG Yong-jiu;ZHI Jian-guo(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Electromagnetic Center,Hunan Zhongke Electric Co.,Ltd.,Yueyang 414000,Hunan,China;Chief Engineer′s Office,Baotou Iron and Steel Group Corp.,Baotou 014010,Nei Mongol,China)
出处
《中国冶金》
CAS
北大核心
2022年第2期84-91,共8页
China Metallurgy
基金
国家自然科学基金资助项目(51874033)
北京市自然科学基金资助项目(2182038)。
关键词
中间包
感应加热
通道结构
钢水流动
各流一致性
tundish
induction heating
channel structure
flow of molten steel
consistency among strands
