耗散型浸入式水口对1 270 mm×150 mm板坯结晶器流场优化

doi:10.13228/j.boyuan.issn1006-9356.20230271

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (4307 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Aiming at the problem of liquid level fluctuation in the production of 1 270 mm × 150 mm slab mold in a steel plant, the structure of the submerged entry nozzle was improved, and the influence of improved submerged entry nozzle on flow field of the mold was analyzed. The results show that the flow field distribution in the mold is more reasonable after the improvement of nozzle, and the surface velocity decreases. The maximum free-surface velocity decreases from 0.414 m/s to 0.365 m/s, a decrease of 11.8%. The particle image velocimetry (PIV) results are consistent with the numerical calculation results of velocity field distribution, confirming the reliability of the numerical calculation results. Finally, water simulation experiments were conducted on the fluctuation of mold oil layer by the prototype nozzle and the improved dissipative nozzle respectively. The research results show that the thickness of the thinnest oil layer under different casting speeds after using dissipative nozzle is much greater than that of the prototype nozzle, which can stably cover the liquid surface without exposing. When the casting speed increases to 2.0 m/min, the thinnest oil layer thickness of the prototype nozzle is only 0.005 m, while the thinnest oil layer thickness is still 0.015 m when using the new dissipative nozzle. Dissipative nozzle can effectively reduce the fluctuation of free-surface and prevent the reoxidation occurrence of molten steel. The research results can provide reference for optimizing the structure of mold nozzle.

Key words： mold numerical simulation submerged entry nozzle free-surface velocity particle image velocimetry flow field optimization

Received: 28 April 2023

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	WANG Yang
	MA Dangshen
	YANG Maosheng
	LI Jingshe
	YANG Shufeng

Cite this article:

WANG Yang,MA Dangshen,YANG Maosheng等. Optimization of flow field in 1 270 mm×150 mm slab mold by dissipative submerged entry nozzle[J]. China Metallurgy, 2023, 33(10): 65-72.

URL:

http://www.zgyj.ac.cn/EN/10.13228/j.boyuan.issn1006-9356.20230271 OR http://www.zgyj.ac.cn/EN/Y2023/V33/I10/65

[1]	蔡开科. 连铸技术发展[J]. 山东冶金,2004(1):1.
[2]	HINTIKKA S,KONTTINEN J,LEIVISKA K. Optimization of molten steel flow in continuous casting mold[C]//Steelmaking Conference Proceedings. Warrendale:Iron and Steel Society,1992:887.
[3]	李四军,彭永香,李萍,等. 超薄大断面异型坯结晶器非对称流场和温度场的优化[J]. 连铸,2021(6):9.
[4]	裴英豪,朱涛,王茹玉,等. 水口浸入深度对CSP结晶器内流场的影响[J]. 连铸,2021(6):38.
[5]	刘文祥,任磊. 浸入式水口倾角对宽幅连铸结晶器内流动行为的影响[J]. 钢铁,2022,57(1):83.
[6]	刘颜彬,唐海燕,王凯民,等. 水口结构对板坯结晶器液面流动行为的影响[J]. 连铸,2022(3):1.
[7]	张乔英,王书桓,王立涛,等. SEN壁厚对结晶器内钢液流场和温度场的影响[J]. 炼钢,2005,21(3):3.
[8]	周俐,徐其言,岳强. 板坯连铸结晶器水口优化试验研究[J]. 连铸,2011(3):15.
[9]	赵洪强,王叶婷,国兴龙,等. 水口侧孔角度对不锈钢板坯连铸结晶器内流场和温度场的影响[J]. 连铸,2011(增刊1):81.
[10]	于会香,张炯明,王万军,等. 板坯连铸浸入式水口出口速度对结晶器流场影响的数值模拟[C]//第一届冶金工程科学论坛论文集. 北京:北京科技大学,2002:492.
[11]	陈斌,李海波,季晨曦,等. 浇铸参数对结晶器液面波动影响及其工业应用[J]. 钢铁,2022,57(7):86.
[12]	HIBBELER L C,THOMAS B G. Mold slag entrainment mechanisms in continuous casting molds[J]. Iron and Steel Technology,2013,10(10):121.
[13]	YUAN Q,VANKA S P,THOMAS B G,et al. Computational and experimental study of turbulent flow in a 0.4-scale water model of a continuous steel caster[J]. Metallurgical and Materials Transactions B,2004,35(5):967.
[14]	周晨阳,黄军,张亚竹,等. 大方坯连铸结晶器水口优化模拟探究[J]. 连铸,2023(1):97.
[15]	张志霄,韩蕾蕾,李向龙,等. 旋流水口对大圆坯结晶器内流动及夹杂物去除行为影响[J]. 连铸,2023(4):48.
[16]	THOMAS B G. Continuous casting[C]//AISE Steel Technol Conference. Pittsburgh,PA:[s.n.],2003:1.
[17]	YOKOYA S,TAKAGI S,IGUCHI M,et al. Swirling flow effect in immersion nozzle on flow in slab continuous casting mold[J]. ISIJ International 2000,40(6):578.
[18]	CHEN Y F,ZHANG L F,YANG S F,et al. Water modeling of self-braking submerged entry nozzle used for steel continuous casting mold[J]. JOM,2012,64(9):1080.
[19]	BIELEFELDT V,VILELA F. Study of inclusions in high sulfur,Al-killed Ca-treated steel via experiments and thermodynamic calculations[J]. Steel Research International,2015,86(4):375.
[20]	肖志祥,李凤蔚.三种湍流模型模拟能力的对比[J].西北工业大学学报,2002,20(3):351.
[21]	HE Q. Observations of vortex formation in the mould of a continuous slab caster[J]. ISIJ International,1993,33(2):343.
[22]	仇轶,由长福,祁海鹰,等. 多相流动的直接数值模拟进展[J].力学进展,1900,33(4):507.
[23]	KLINE S,REYNOLDS W,SCHRAUB F,et al. The structure of turbulent boundary layers[J]. Journal of Fluid Mechanics,1967,30(4):741.
[24]	KARMAN V. On the statistical theory of turbulence [J]. Proceedings of the National Academy of Sciences of the United States of America,1937,23(2):98.
[25]	HINZE J. Turbulence[M]. New York:Mcgraw-Hill College,1975.
[26]	LEE J H,HAN S,CHO H J,et al. Numerical and experimental study of the meniscus vortex core in a water model of continuous casting mold[J]. Metallurgical and Materials Transactions B,2021,52:178.
[27]	陈士杰. 1 400 mm×230 mm板坯结晶器流场优化的数值模拟研究[J]. 冶金设备,2017(4):28.
[28]	LIANG M,CHO S M,RUAN X,et al. Modeling of multiphase flow,superheat dissipation,particle transport,and capture in a vertical and bending continuous caster[J]. Processes,2022,10(7):1429.
[29]	WANG Y,YANG S,WANG F,et al. Optimization on reducing slag entrapment in 150 × 1 270 mm slab continuous casting mold[J]. Materials,2019,12(11):1.
[30]	DEMASI G A,HARTMANN R F. Development of the ladle shroud mechanism and its metallurgical benefits[C]//Steelmaking Conference Proceedings. Warrendale,PA:Iron and Steel Society of AIME,1981:245.
[31]	ZHANG L,THOMAS B G. State of the art in evaluation and control of steel cleanliness[J]. ISIJ International,2003,43(3):271.
[32]	MORALES R D,GARCIA-HERNANDEZ S,BARRETO J D J,et al. Multiphase flow modeling of slag entrainment during ladle change-over operation[J]. Metallurgical and Materials Transactions B,2016,47(4):2595.
[33]	SOLORIO-DIAZ G,MORALES R D,PALAFOX-RAMOS J,et al. Modeling the effects of a swirling flow on temperature stratification of liquid steel and flotation of inclusions in a tundish[J]. ISIJ International,2005,45(8):1129.
[34]	ZHANG L,YANG S,CAI K,et al. Investigation of fluid flow and steel cleanliness in the continuous casting strand[J]. Metallurgical and Materials Transactions B,2007,38(1):63.
[35]	RENÉ H,RÜDIGER S,HELLER HP,et al. Model investigations on the stability of the steel-slag interface in continuous-casting process[J]. Metallurgical and Materials Transactions B,2013,44(1):80.
[36]	WANG L,LEE H,HAYES P. A new approach to molten steel refining using fine gas bubbles[J]. ISIJ International,1996,36(1):17.