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Effect of gas curtain in tundish on flow field and inclusions removal |
ZUO Xiao-tan1, ZHAO Li1, ZHANG Ya-bing1, ZHANG Xu-bin2, WANG Qiang-qiang2 |
1. Steelmaking Plant,Wuhu Xinxing Ductile Iron Pipes Co.,Ltd.,Wuhu 241002,Anhui,China; 2. College of Materials Science and Engineering, Chongqing University, Chongqing 400044,China |
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Abstract To eliminate the adverse effect resulting from inclusions formed during the continuous casting of high-Ti steel, this study considered the influence of gas adsorption on inclusions, built the numerical model of the flow field and inclusions motion and removal within tundish, and discussed the influence of gas curtain and its location on the flow and inclusion removal. The main results show that as particles with small sizes had good following ability driven by molten steel, and low buoyancy, the removal rate of particles in the 1-10 μm range was almost zero under traditional tundish. After applying the gas curtain with 5 L/min gas flow rate, the removal rates for both Al2O3 and TiN were enhanced obviously, 21.7%-34.6% for Al2O3 particles and 22.7%-33.14% for TiN particles in the range of 1-10 μm. When the gas curtain was located between the turbulence inhibitor and the up-dam, the flow speed of steel circulation became larger, to increase the probability of inclusion collision with bubbles. Thus, the probability of inclusions being captured by bubble increased, which was more conducive to inclusion removal. The current study can provide theoretical guidance for inclusion removal in the continuous casting of high-Ti steel.
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Received: 12 May 2022
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[1] |
Joo S, Guthrie R I L. Inclusion behavior and heat-transfer phenomena in steelmaking tundish operations: Part I. Aqueous modeling[J]. Metallurgical Transactions B, 1993, 24(5): 755.
|
[2] |
Joo S, Han J W,Guthrie R I L. Inclusion behavior and heat-transfer phenomena in steelmaking tundish operations: Part II. Mathematical model for liquid steel in tundishes[J]. Metallurgical Transactions B, 1993, 24(5): 767.
|
[3] |
Joo S, Han J W,Guthrie R I L. Inclusion behavior and heat-transfer phenomena in steelmaking tundish operations: Part III. applications-computational approach to tundish design[J]. Metallurgical Transactions B, 1993, 24(5): 779.
|
[4] |
包燕平, 王敏. 中间包冶金技术发展趋势[J]. 连铸, 2021(5): 2.
|
[5] |
Taslicukur Z,Balaban C,Kuskonmaz N. Production of ceramic foam filters for molten metal filtration using expanded polystyrene[J]. Journal of the European Ceramic Society, 2007, 27(2): 637.
|
[6] |
李明, 翟卫江. 锆质过滤器对钢中夹杂物的影响[J]. 中国冶金, 2016, 23(11): 26.
|
[7] |
梁震江, 郑万, 王君驰, 等. 过滤控流中间包流场及夹杂物去除的数值模拟[J]. 连铸, 2021(5): 88.
|
[8] |
Tanaka Tsutomu, Yoshida Masaru, Yasumoto Kunio. Solidification control making use of high frequency electromagnetic field in a mould connected with tundish[J]. Transactions of the Iron and Steel Institute of Japan, 1994, 34(5): 420.
|
[9] |
王凯民, 唐海燕, 肖红,等. 六流双通道感应加热中间包钢水流动控制[J]. 中国冶金, 2022, 32(2): 84.
|
[10] |
陈希青, 肖红, 王璞, 等. 双通道感应加热中间包的三维磁流热耦合模型[J]. 钢铁, 2021, 56(6): 48.
|
[11] |
袁己百, 马志民, 殷攀, 等. 四流H型感应加热中间包控流装置设计[J]. 连铸, 2021(6): 85.
|
[12] |
Keiji Nakajima, Morio Kawasaki. Promotion of inclusion float-out in continuous casting tundish bath by gas blowing[J]. Tetsu-to-Hagane, 1987, 73(7): 860.
|
[13] |
武光君. 板坯连铸中间包气幕挡墙技术开发与应用[J]. 连铸, 2018(1): 34.
|
[14] |
ZHONG L C, LI L Y, WANG B, et al. Fluid flow behaviour in slab continuous casting tundish with different configurations of gas bubbling curtain[J]. Ironmaking and Steelmaking, 2013, 35(6): 436.
|
[15] |
LI L Y, WANG B, ZHANG L,et al. Fluid flow behaviour in slab continuous casting tundish with different configurations of gas bubbling curtain[J]. Ironmaking and Steelmaking, 2008, 35(6): 436.
|
[16] |
DONG S K, Hyo S S, YONG D L, et al. Clogging of the submerged entry nozzle during the casting of titanium bearing stainless steels[C]//Steelmaking Conference Proceedings. Chicago: Steelmaking Division of the Iron and Steel Society Iron and Steel Society, 1997.
|
[17] |
ZHUO Chen, MIN Li, WANG Xu-feng, et al. Mechanism of floater formation in the mold during continuous casting of Ti-stabilized austenitic stainless steels[J]. Metals, 2019, 6: 635.
|
[18] |
WANG Lai-hua,Haegeon Lee, Hayes Peter. Prediction of the optimum bubble size for inclusion removal from molten steel by flotation[J]. ISIJ International, 1996, 36(1): 7.
|
[19] |
DUAN Hao-jian, REN Ying, ZHANG Li-feng. Effects of interphase forces on fluid flow in gas-stirred steel ladles using the Eulerian-Lagrangian multiphase approach[J]. JOM, 2018, 70(10): 2128.
|
[20] |
LING Hai-tao, LI Fei, ZHANG Li-feng, et al. Investigation on the effect of nozzle number on the recirculation rate and mixing time in the RH process using VOF + DPM model[J]. Metallurgical and Materials Transactions B, 2016, 47(3): 1950.
|
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