Abstract: According to structure and operation parameters of a 32 t tundish for 150 mm X 150 mm 6-strand concasting billet at steelmaking workshop, Shuicheng Steel, the effect of gas curtain technology on characteristics of liquid flow in tundish and removal rate of inclusion particles in steel has been studied by using mathematical simulation method, and the commercial test for casting HPB235 and 65 C steel is carried out. Results show that the gas curtain weir is available to improve flow situation of liquid, balance residence time at each outlet, effectively prolong the residence time of liquid in tundish, decrease dead zone volume and increase removal rate of inclusion particles. This technology is suitable to meet the requirement for cleanliness steel steelmaking with tundish for multi-strand casting.

Key words: Tundish, Gas Curtain Weir, Mathematic Simulation, Optimization, Commercial Practice

摘要： 根据水钢炼钢厂150 mm×150 mm六流连铸32 t中间包的结构操作工艺参数,采用数模仿真法研究了气幕挡墙技术对中间包内钢液流动特性及夹杂物去除的影响,并对HPB235和65钢进行了工业试验。结果表明,气幕挡墙可以有效改善钢液的流动状态,均衡各出口停留时间,有效延长钢液的平均停留时间,降低死区体积,提高夹杂物去除率。该技术适应多流中间包纯净钢冶炼的需求。

关键词: 中间包, 气幕挡墙, 数模仿真, 优化, 工业实践