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| Design and Investigation of a Novel Submerged Entry Nozzle Used in Super-Large Round Bloom Continuous Casting |
| ZHANG Xing-zhong1,ZHENG Xue-ran2,LIU Qing-guo1,WANG Chao3 |
（1. National Engineering Research Center for Equipment and Technology of C.S.R., Yanshan University, Qinhuangdao 066004, Hebei, China
2. National Engineering Research Center of Continuous Casting Technology, Beijing 100081, China
3. Dalian Design and Research Institute China, First Heavy Industries, Dalian 116600, Liaoning, China） |
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Abstract For the characteristic of continuous casting super-large round bloom, a novel SEN (submerged entry nozzle) called umbrella type SEN was proposed to reduce the impingement depth of molten steel by its own structure and keep fluid flow and heat transfer distributed uniformly in circumferential direction. A coupled analysis mathematical model in continuous casting mold was presented, and the fluid flow, heat transfer and solidification of the molten steel in the mold were simulated. The superiority and rationality of the SEN were verified that the molten steel stream spouted from umbrella nozzle took the shape of upper and lower circulation loops, which can not only be convenient for inclusions and gas to float up, but also can decrease the penetration depth of the jet. Meanwhile, liquid steel with superheat was distributed uniformly at upper mold zone, and a noticeable increase of temperature was observed on meniscus which may benefit the melting of slag; solidified shell distributed uniformly in circumferential direction, thereby reducing the probability of longitudinal crack. Solidified shell was 31.2mm thick at the outlet of the mold at the casting speed of 0.35m/min, which can ensure the safety in production.
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Received: 01 July 2013
Published: 13 December 2013
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| [1] |
Thomas B G, Mika L J, Najjar F M. Simulation of Fluid Flow Inside a Continuous Slab Casting Machine[J]. Metal Trans B, 1990, 21(2): 387
|
| [1] |
Thomas B G, Mika L J, Najjar F M. Simulation of Fluid Flow Inside a Continuous Slab Casting Machine[J]. Metal Trans B, 1990, 21(2): 387
|
| [2] |
Hintikka S, Konttinen J, Leiviska K. Optimization of Molten Steel Flow in Continuous Casting Mold[C]// Steelmaking Conference Proceedings, 1992: 887
|
| [2] |
Hintikka S, Konttinen J, Leiviska K. Optimization of Molten Steel Flow in Continuous Casting Mold[C]// Steelmaking Conference Proceedings, 1992: 887
|
| [3] |
吴耀光,陈远清,仇圣桃等.大圆坯连铸用新型旋流水口的数值模拟[J]. 钢铁钒钛,2009,30(4):49
|
| [3] |
吴耀光,陈远清,仇圣桃等.大圆坯连铸用新型旋流水口的数值模拟[J]. 钢铁钒钛,2009,30(4):49
|
| [4] |
Fluent Inc., FLUENT User’s Guide[M]. Fluent Inc., 2010
|
| [4] |
Fluent Inc., FLUENT User’s Guide[M]. Fluent Inc., 2010
|
| [5] |
Yin Hebi, Yao Man. Inverse Problem-based Analysis on Non-uniform Profiles of Thermal Resistance between Strand and Mould for Continuous Round Billets Casting[J]. Journal of Materials Processing Technology,2007,183(1): 49
|
| [5] |
Yin Hebi, Yao Man. Inverse Problem-based Analysis on Non-uniform Profiles of Thermal Resistance between Strand and Mould for Continuous Round Billets Casting[J]. Journal of Materials Processing Technology,2007,183(1): 49
|
| [6] |
Liangliang GUO, Xudong WANG et al. Mould Heat Transfer in the Continuous Casting of Round Billet[J]. ISIJ International, 2007, 47(8):1108
|
| [6] |
Liangliang GUO, Xudong WANG et al. Mould Heat Transfer in the Continuous Casting of Round Billet[J]. ISIJ International, 2007, 47(8):1108
|
| [7] |
盛义平,孔祥东,杨永利.连铸结晶器传热边界条件研究[J].中国机械工程,2007,18(13):1615
|
| [7] |
盛义平,孔祥东,杨永利.连铸结晶器传热边界条件研究[J].中国机械工程,2007,18(13):1615
|
| [8] |
Jong-Kyu YOON. Applications of Numerical Simulation to Continuous Casting Technology[J]. ISIJ International, 2008, 48(7):879
|
| [8] |
Jong-Kyu YOON. Applications of Numerical Simulation to Continuous Casting Technology[J]. ISIJ International, 2008, 48(7):879
|
| [9] |
冯捷. 连续铸钢生产[M]. 冶金工业出版社.北京, 2005:145
|
| [9] |
冯捷. 连续铸钢生产[M]. 冶金工业出版社.北京, 2005:145
|
| [10] |
吴耀光, 龚志翔, 张建平等. 圆坯连铸工艺优化试验研究[J].钢铁,2008,43(8):31
|
| [10] |
吴耀光, 龚志翔, 张建平等. 圆坯连铸工艺优化试验研究[J].钢铁,2008,43(8):31
|
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2013, Vol. 48 
