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Flow field simulation of thin slab funnel-type crystalline steel based on large vortex simulation |
LI Xue-kai1,2, ZHANG Yan-chao1,2, ZHANG Cai-jun1,2, XIAO Peng-cheng1,2, GUO Wen-bin3 |
1. School of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063000, Hebei,China; 2. Hebei High Quality Steel Continuous Casting Engineering Technology Research Center, Tangshan 063000,Hebei,China; 3. Tangshan Thick Plate Co.,Ltd., Tangshan 063000,Hebei,China |
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Abstract The core of efficient continuous casting is high drawing speed. In order to explore the influence of different operating parameters on the flow field of thin slab crystallizer under the condition of high drawing speed, the paper takes FTSC (Flexible Thin Slab Caster) thin slab crystallizer and new five-hole water orifice as research objects. Based on the surface velocity and fluctuation height of the steel slag interface in the mold flow field, a slag-liquid steel two-phase flow model was established by using large eddy simulation method. The numerical simulation of the mold flow field was carried out, and the effects of drawing speed, immersion depth of the water nozzle and the viscosity of the protective slag on the mold flow field and the steel slag interface flow behavior were analyzed. The results show that increasing the drawing speed can increase the surface velocity and liquid level fluctuation of steel slag interface. The deepening of the immersion depth of the nozzle will reduce the surface pulling speed and liquid level fluctuation. At the drawing speed of 6 m/min, increasing the viscosity of the protective slag can effectively inhibit the slag rolling.
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Received: 04 November 2022
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[1] |
LI Z,ZHANG L,MA D,et al.Numerical simulationon flow characteristic of molten steel in the mold with freestanding adjustable combination electromagnetic brake[J].Metallurgical and Materials Transactions B, 2020,51(31):2609.
|
[2] |
周海忱,刘国梁,李海波,等.基于数值模拟的结晶器卷渣在线预测方法[J].钢铁,2022,57(8):103.
|
[3] |
李向龙,冯胜强,张志霄,等.连铸坯拉速对结晶器卷渣现象的影响[J].连铸,2022(2):100.
|
[4] |
毛新平,高吉祥,柴毅忠.中国薄板坯连铸连轧技术的发展[J].钢铁,2014,49(7):49.
|
[5] |
朱苗勇.高效连铸结晶器冶金过程控制关键技术探讨[J].连铸,2011(增刊1):1
|
[6] |
BIELNICKI M, JOWSA J. Physical and numerical modeling of liquid slag entrainment in mould during slabs casting[J]. Metallurgical Research and Technology, 2020, 117(5):509.
|
[7] |
LI X, BAO Y P, WANG M, et al. Simulation study on factors influencing the entrainment behavior of liquid steel as bubbles pass through the steel/slag interface[J]. International Journal of Minerals Metallurgy and Materials, 2016, 23(5):511.
|
[8] |
ZHANG Z N, WANG Z Y, LIU H, et al. Experimental study on entrained droplets in vertical two-phase churn and annular flows[J]. International Journal of Heat and Mass Transfer, 2019, 138:1346.
|
[9] |
HIBBERLER L C, THOMAS B G. Mold slag entrainment mechanisms in continuous casting molds[J]. Iron Steel Technol, 2013, 10(10): 121.
|
[10] |
郑万,寇锦荣,陈小龙,等.高速连铸结晶器卷渣缺陷的特征、演变及控制[J].炼钢,2021,37(4):30.
|
[11] |
赵鹏,周兰花.连铸结晶器卷渣过程的实验设计及数值模拟[J].力学与实践,2020,42(1):56.
|
[12] |
李宝宽,刘中秋,齐凤升,等.薄板坯连铸结晶器非稳态湍流大涡模拟研究[J].金属学报,2012,48(1):23.
|
[13] |
LIU Z, SUN Z, LI B. Modeling of quasi-four-phase flow in continuous casting mold using hybrid Eulerian and Lagrangian approach[J]. Metallurgical and Materials Transactions B, 2017, 48(2):1248.
|
[14] |
ZHAO P, LI Q, KUANG S B, et al. Mathematical modeling of liquid slag layer fluctuation and slag droplets entrainment in a continuous casting mold based on VOF-LES method[J]. High Temperature Materials and Processes, 2017, 36(5):551.
|
[15] |
JOWSA J, BIELNICKI M, CWUDZINSKI A. Physical and numerical investigations of mould flux entrainment into liquid steel [J].Archives of Metallurgy and Materials, 2016, 61(4):2043.
|
[16] |
窦冠琪,王宝峰,李建超,等.宽厚板坯连铸结晶器内的钢液流场的数值模拟[J].连铸,2013(1):27.
|
[17] |
王永胜,王新华,王万军.高拉速板坯连铸结晶器液面波动影响因素研究[J].中国冶金,2009,19(9):24.
|
[18] |
庄迎,李吉东.不锈钢方坯连铸结晶器内钢渣界面行为的数值模拟研究[J].连铸,2016(5):26.
|
[19] |
周秋月,朱坦华,张立峰,等.非稳态浇铸对结晶器卷渣定量影响的大涡模拟[J].钢铁,2022,57(4):68.
|
[20] |
张建伟,苏旺,崔衡,等.PIV测速技术分析异型坯连铸结晶器流场[J].连铸,2019(1):54.
|
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