Influence of Diversion Hole Inclination on Near Surface Flow Behavior of Liquid Steel in Tundish
Reasonable near surface flow is beneficial to extend the residence time of molten steel and remove inclusion in tundish.To study the relationship between the different inclination configuration scheme of diversion hole and the near surface flow behavior of liquid steel in tundish,one water model of 1:4 ratio has been established according to the process condition of one steelmaking plant in China,the process casting speed is 0.5m/min and the dimensions of casting section is 300mm×360mm,there are two diversion hole in each primary diversion wall in tundish,the inner diameter of diversion hole is 100mm.The experiment results showed that the average residence time of the molten steel is shorter when the inclination of diversion hole is smaller,and the near surface flow is not developed sufficiently in tundish.When the inclination of upper diversion hole is fixed,with the increasing of inclination of the lower diversion hole,the near surface flow of liquid steel is improved gradually in tundish,and the average residence time of the molten steel in tundish has been increased.When the casting speed is increased,the influence of inclination configuration scheme of diversion hole on the near surface flow behavior of molten steel is decreased.Higher casting speed and larger lower diversion hole inclination are beneficial to reduce the difference of the residence time among the different strand.The optimization inclination configuration of diversion hole is that the inclination of upper diversion hole is 30° and the inclination of lower diversion hole is 40°,the corresponding average residence time of molten steel in tundish is 11.66 min,and the largest difference of the residence time among different strand is 0.23 min.
diversion hole inclination near surface flow tundish continuous casting
Changgui CHENG Zewei LIANG Shibin QI Yan JIN Jiafa ZHU
Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and Technology,Wuhan 430081,China
国际会议
the 6th International Congress on the Science and Technology of Steelmaking,ICS2015(第六届国际炼钢科技大会)
北京
英文
704-707
2015-05-12（万方平台首次上网日期，不代表论文的发表时间）