摘要
以某钢厂八流方坯中间包为研究对象,采用物理模拟与数值模拟相结合的方法,基于中间包的流场、温度场及钢水停留时间分布等参数评价原控流方案下中间包钢水流动存在的问题;分析挡墙导流孔数量、孔径、位置和倾角对中间包钢水流动特性的影响,优化中间包控流装置。结果表明:原控流方案下中间包钢水存在死区体积较大、各流一致性较差及温度场不均匀等问题;优化控流方案为在挡墙侧墙减小2个导流孔孔径并提升其位置,在中间墙增加带偏角(43°)和仰角(15°)的小导流孔。优化方案的中间包流场和温度场得到大幅改善,死区体积比例由原方案的19.04%降至7.06%,活塞流和全混流体积比例均有所增加,且各流滞止时间、实际平均停留时间和峰值时间一致度均提高到80%以上,各流一致性得到大幅提升;优化方案中间包最大温差为16.004 K,比原方案下降2.182 K,且各流出口钢液最大温差为0.616 K,比原方案下降0.944 K,整个中间包温度场更均匀。
Taking the eight-strand billet tundish of a steel mill as the research object,the physical and numerical simulation methods were used to evaluate the problem of steel flow in the tundish under the original flow control scheme based on parameters such as flow field,temperature field,and residence time distribution.The influence of the number,aperture,position,and inclination angle of diversion holes in the retaining wall on the flow characteristics of steel in the tundish was analyzed to optimize the flow control device in the tundish.The results show that under the original flow control scheme,there are problems with a large dead zone volume,poor consistency among different flows,and uneven temperature field in the ladle molten steel.The optimized flow control plan is to reduce the aperture of two diversion holes on the side wall of the retaining wall and increase their position,and to add small diversion holes with a deviation angle(43°)and an elevation angle(15°)on the middle wall.The flow field and temperature field in the tundish of the optimized scheme are significantly improved,with the dead zone volume ratio reduced from 19.04%in the prototype scheme to 7.06%.The volume ratio of piston flow and fully mixed flow has increased,and the consistency of the stagnation time,actual average residence time,and peak time of each strand is increased to over 80%,resulting in a significant improvement in the consistency among each strand.For the optimized scheme,the maximum temperature difference of the tundish is 16.004 K,which is 2.182 K lower than the prototype scheme,and the maximum temperature difference of liquid steel at the outlet of each strand is 0.616 K,which is a decrease of 0.944 K compared to the original plan,and the temperature field of the entire tundish is more uniform.
作者
李浩
李新
陶承岗
朱李艳
宋瑛洁
王欣瑶
林小祥
吴全俊
何飞
LI Hao;LI Xin;TAO Chenggang;ZHU Liyan;SONG Yingjie;WANG Xinyao;LIN Xiaoxiang;WU Quanjun;HE Fei(Special Steel Company,Maanshan Iron&Steel Co.,Ltd,Maanshan 243000,China;School of Metallurgical Engineering,Anhui University of Technology,Maanshan 243032,China)
出处
《安徽工业大学学报（自然科学版）》
CAS
2024年第2期142-150,共9页
Journal of Anhui University of Technology（Natural Science）
基金
安徽省高校自然科学基金项目(2022AH050293)。
关键词
中间包
控流装置
物理模拟
数值模拟
流场
温度场
tundish
flow control device
physical simulation
numerical simulation
flow field
temperature field
