ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2015, Vol. 36 ›› Issue (2): 13-16.

• 试验研究 • 上一篇    下一篇

水口扩张角对230mm x 1300 mm板坯结晶器流场及氩气泡行为的影响

肖太平1,倪红卫1,孔勇江2,吴扬1,张华1   

  1. 1. 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,武汉 430081;
    2. 武汉钢铁股份有限公司炼钢总厂,武汉 430083;
  • 收稿日期:2014-10-15 出版日期:2015-04-01 发布日期:2022-08-22
  • 作者简介:肖太平(1989-)男,硕士研究生(武汉科技大学),2012年武汉科技大学(本科)毕业,连铸结晶器数值模拟。

Influence of Nozzle Divergence Angle on Argon Bubble Behavior and Flow Field in Mould for 230 mm x 1300 mm Slab

Xiao Taiping1 , Ni Hongwei1 , Kong Yongjiang2 , Wu Yang1 , Zhang Hua1   

  1. 1. Key Lab for ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081 ;
    2. Steelmaking Plant, WISCO, Wuhan 430083;
  • Received:2014-10-15 Published:2015-04-01 Online:2022-08-22

摘要: 利用离散相模型研究水口扩张角(0~12°)对230mm×1300 mm板坯结晶器流场及氩气泡行为影响。并用水模型实验进行了验证。结果表明,扩张角增大,能显著减小注流冲击深度及氩气泡在自由液面上浮区域;尤其当扩张角为9°时,结晶器流场较好,自由液面波动较小,有利于夹杂物去除及减轻界面卷渣几率。双流230mm板坯连铸工业性试验表明,安装扩张角9°的水口一流铸坯较安装无扩张角水口的另一流铸坯表面夹渣发生率降低了5.9%~14.8%。

关键词: 板坯连铸, 水口扩张角, 数值模拟, 水模型, 吹氩

Abstract: Influence of nozzle side-hole divergence angle (0-12°) on argon bubble behavior and flow field of liquid in mould for 230 mm x 1 300 mm slab has been studied by using discrete phase model, and verified by water model test. Results show that increasing nozzle divergence angle can significantly reduce the impact depth and floating area of argon bubbles at free surface of liquid ; especially with divergence angle 9°, the flow field in mould is better and the free surface of liquid is smaller, it is available to remove the inclusions in liquid and reduce the probability of slag entrapment. The double strands 230 mm slab commercial casting results show that as compared with second strand slab without divergence angle nozzle the occurrence of slag entrapment ratio of first strand slab with installed divergence angle 9° nozzle decreases by 5.9%-14.8%.

Key words: Slab Casting, Nozzle Side-Hole Divergence Angle, Numerical Simulation, Water Model, Argon Blowing in Mould