异型坯连铸机中间包结构优化设计与应用  

Optimization design and application of tundish for special shape billet continuous casting machine

作　　者：高山 高志滨 王忠刚 刘忠建 GAO Shan;GAO Zhibin;WANG Zhonggang;LIU Zhongjian(Steelmaking Plant,Laiwu Iron and Steel Group Yinshan Section Steel Co.,Ltd.,Jinan 271104,Shandong,China)

机构地区：[1]莱芜钢铁集团银山型钢有限公司炼钢厂,山东济南271104

出　　处：《连铸》2024年第4期67-76,共10页Continuous Casting

摘　　要：为提高异型坯T型中间包冶金效果,对中间包流场和温度场等进行数值模拟和物理模拟,通过分析冲击区大小、稳流器开孔张角、稳流器开孔仰角以及稳流器立墙形式对流场的影响,制定了适合异型坯中间包内型尺寸和稳流器最佳的中间包结构。工业试验表明,改进后的中间包冶金效果明显优于原中间包。中间包优化前后测温、取样结果显示,优化前后1流、3流温度与2流平均温差由原来的11.8℃降低至3.95℃,降低幅度达66.5%以上;优化后1流、2流的氧质量分数和氮质量分数均相同,平均氧质量分数比优化前下降17.17%。说明优化后的中间包流场明显优于原中间包流场,改进后的中间包利于均匀钢水温度、成分和提高铸坯洁净度与表面质量。优化后稳流器对中间包内衬渣线侵蚀情况也得到明显改善,由原32 h侵蚀55 mm降低至目前48 h侵蚀45 mm,显著提高了中间包寿命。In order to improve the metallurgical effect of"T"shaped billet tundish,we researched the flow field and temperature field in tundish by numerically and physically simulated methods.Through analyzing the influence of the size of impact zone,opening angle of stabilizer,opening elevation angle of stabilizer and the type of vertical wall of stabilizer on the flow field,we had obtained the optimum tundish size and the tundish structure for the profiled billet.The industrial test shows that the metallurgical effect of the improved tundish is obviously better than that of the original tundish.The results of temperature measurement and sampling before and after tundish optimization show that the average temperature difference between the first and the third flow and the second flow decreases from 1l.8℃to 3.95 C,and the reduction is more than 66.5%.After optimization,the mass fraction of oxygen and ni-trogen in 1 and 2 streams are the same,and the average mass fraction of oxygen decreases by 17.17%.The flow field of the optimized tundish is obviously better than that of the original tundish.The improved tundish is beneficial to the uniformity of molten steel temperature,composition and the improvement of billet cleanliness and surface quality.After optimization,the slag line erosion of face tundish is also improved,which is reduced from 55 mm in 32 h to 45mm in 48 h,and the tundish life is increased remarkably.

关 键 词：中间包 数值模拟 物理模拟 流场 结构优化 

分 类 号：TF341.6[冶金工程—冶金机械及自动化]