无挡墙中间包内流动状况数值模拟研究
Numerical Simulation of the Flow Field in Tundish Without Dams
黄京宇 1金焱 1甘菲芳 2林鹏 1程常桂 1王家轩 1孙逸飞鸿 1张博翔 1李军 1李晓婷 1吴健舟1
作者信息
- 1. 武汉科技大学耐火材料与冶金国家重点实验室,武汉 430081
- 2. 中国宝武(宝钢股份)中央研究院,上海 201900
- 折叠
摘要
利用数学模型研究了国内某厂的中间包不设置挡墙对中间包流场的影响,并用水模型验证了数学模型的有效性.结果表明,在设置挡墙的中间包内,夹杂物碰撞长大的区域主要是湍流抑制器内和上方空间及上下挡墙之间区域.中间包不设挡墙将出现大面积的超低速流区,死区扩大,平均停留时间大幅延长.改造湍流抑制器,将残钢孔改成直径为ϕ75 mm、孔宽为150 mm的导流孔,可减少死区和超低流速区,平均停留时间大幅延长,长水口吹氩流量可以提高至2.5×10-4 Nm3/min而不出现渣眼现象,有利于夹杂的去除,但是去除挡墙后有利于夹杂物碰撞长大的区域将大幅缩减.
Abstract
A mathematical model was established to investigate the influence of nondam on flow field in tundish in a Chinese steel mill,and a water model was adopted to verify the mathematical model.The results indicate that in the tundish with dams,the colliding zones are inner-space of inhibitor and the zone between upper and lower baffles.The tundish without dams operates with large volume of ultra-low-velocity zone,enlarged dead zone and ultra-long residen-tial time.The inhibitor was modified and the diameter of hole was increased to 75 mm and the width was increased to 150 mm,which can reduce dead zone and ultra-low-velocity zone,greatly extending the average residential time.The flux rate of argon blowing in shroud can be increased to 2.5×10-4 Nm3/min without hot eye and slag entrainment,which helps to removal of inclusion.However,inclusion-easy-colliding zone is decreased abundantly after removing the dams in tundish.
关键词
中间包/挡墙/流场/卷渣Key words
Tundish/Dam/Flow Field/Slag Entrainment引用本文复制引用
基金项目
国家自然科学基金资助项目(52174324)
出版年
2024
NETL
NSTL
万方数据