EMBr对高拉速薄板坯钢水动态行为影响的模拟

doi:10.13228/j.boyuan.issn1005-4006.20220028

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摘要在高拉速薄板坯的生产工艺研究中,结晶器内钢水流场是决定坯壳均匀性、液面卷渣概率等铸坯质量问题的关键因素。EMBr能够显著改变钢水流场,是改善这些问题的关键工艺技术。因此,对结晶器内钢水流场的模拟、分析与优化是必不可少的工作。以往的研究中,相关的数据与理论指导较少,针对薄板坯无头轧制产线,高拉速连铸机的分析与研究更鲜有报道。因此基于该高拉速连铸机,采用数值模拟方法获得了结晶器内不同电磁制动电流强度的磁感强度分布。采用电磁与多相流耦合模式,针对不同磁感强度条件下的结晶器钢水流场分布与液面形貌进行了仿真模拟,并分析了电磁制动对液面波动的影响。结果表明,基于固定的工况环境,电磁制动电流值为175 A时钢水流场分布均匀,钢水液面流速相对最低,最高流速约为0.6 m/s,同时液面高度差与剪切角相对最小。该条件最有利于减少因坯壳不均或液面卷渣造成铸坯缺陷的概率。电流值225 A相比125 A时,钢水液面位置磁感强度仅提高0.02 T,液面到达稳定时间仅缩短约1 s。因此存在综合评判下的最优电流值。

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	马明
	郑旭涛
	喻尧
	王诗
	田振
	谢清华

关键词 ：高拉速薄板坯, 电磁制动, 多相流, 流场, 数值模拟

Abstract：In the research on the production technology of thin slab with high casting speed, the steel flow field in the mold is the key factor to determine the slab quality problems such as the uniformity of slab shell and the probability of liquid level slag entrapment. EMBr can significantly change the flow field of molten steel, which is the key process technology to improve these problems. Therefore, it is essential to simulate, analyze and optimize the steel flow field in the mold. In the previous research, there are few relevant data and theoretical guidance, and there are few reports on the analysis and research of high casting speed continuous caster for thin slab endless rolling line. Based on the high casting speed continuous caster, the magnetic induction distribution of different electromagnetic braking current intensity in the mold is obtained by numerical simulation. Using the coupling mode of electromagnetic and multiphase flow, the flow field distribution and liquid surface morphology of steel in mold under different magnetic induction intensity are simulated, and the influence of electromagnetic braking on liquid surface fluctuation is analyzed. The results show that: Based on the fixed working condition environment, when the electromagnetic braking current value is 175 A, the flow field of steel is evenly distributed, the liquid surface velocity of steel is relatively lowest, the maximum velocity is about 0.6 m/s, and the liquid surface height difference and shear angle are relatively minimum. This condition is most conducive to reducing the probability of slab defects caused by uneven shell or liquid level slag. When the current value is 225 A, compared with 125 A, the magnetic induction intensity at the liquid level of steel is only increased by 0.02 T, and the time for the liquid level to reach stability is only shortened by about 1 s. Therefore, there is an optimal current value under comprehensive evaluation.

Key words： high casting speed thin slab electromagnetic braking multiphase flow flow field numerical simulation

收稿日期: 2022-02-26

引用本文:

马明, 郑旭涛, 喻尧, 王诗, 田振, 谢清华. EMBr对高拉速薄板坯钢水动态行为影响的模拟[J]. 连铸, 2022, 41(5): 17-22. MA Ming, ZHENG Xu-tao, YU Yao, WANG Shi, TIAN Zhen, XIE Qing-hua. Simulation of the effect of EMBr on the dynamic behavior of molten steel in thin slab with high casting speed. CONTINUOUS CASTING, 2022, 41(5): 17-22.

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[1]	任磊.宽板坯连铸结晶器内钢液流动与铸坯表面质量的关系研究[D].北京:北京科技大学,2017.
[2]	仇德金,张朝晖,冯璐,等.连铸过程中夹杂物去除数值模拟研究现状[J].钢铁研究学报,2020,32(11):937.
[3]	田贵昌,季晨曦,高荣正,等.连铸结晶器内水口结构对卷渣行为影响的物理模拟[J].炼钢,2021,37(6):38.
[4]	伍旋,王明林,张延玲,等.高拉速板坯结晶器流场影响因素的模拟研究[J].炼钢,2020,36(1):27.
[5]	张然,许琳,韩泽峰,等.立式组合电磁制动对CSP结晶器内钢液流动及偏流控制[J].中国冶金,2022,32(1):44.
[6]	朱立光,张利民,王杏娟,等.漏斗形结晶器液面流场物理试验与数值模拟分析[J].连铸,2021(6):2.
[7]	刘珂,季晨曦,王胜东,等.MCCR产线110 mm薄板坯结晶器流场的数值模拟[J].钢铁研究学报,2021,33(2):143.
[8]	李康康,张彩军,肖鹏程,等.电磁制动下薄板坯结晶器内钢液流动优化[J].连铸,2020(6):9.
[9]	李康康,张彩军,肖鹏程,等.高拉速薄板坯连铸结晶器钢渣界面波动分析[J].连铸,2021(1):9.
[10]	吴颖东,刘中秋,李宝宽.坯壳导电性对电磁制动结晶器多物理场的影响[J].连铸,2020(6):1.
[11]	徐绵广,刘和平,项利,等.电磁制动对CSP漏斗形结晶器开浇过程影响的数值模拟[J].钢铁,2014,49(1):28.
[12]	武绍文,张彩军,刘毅,等.板坯连铸结晶器流场物理与数学模拟研究[J].炼钢,2019,35(1):54.
[13]	赵鹏.连铸结晶器内液面波动行为的大涡模拟[J].钢铁钒钛,2019,40(6):101.
[14]	郑英辉,赵建平,唐广鹏.电磁制动技术在FTSC薄板坯连铸中的应用[J].河北冶金,2021(3):74.
[15]	杨宇威,苏志坚,陈进,等.复合磁场作用下板坯结晶器内流场与温度场的数值模拟[J].材料与冶金学报,2021,20(3):185.
[16]	Yang H, Vanka S P, Thomas B G. Mathematical modeling of multiphase flow in steel continuous casting[J]. ISIJ International, 2019,59(6):956.
[17]	Real R C A, Carvajal M I, Sanchez S F, et al. Three-Dimensional flow behavior inside the submerged entry nozzle[J]. Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, 2018, 49(4):1644.
[18]	王杨.薄板坯连铸结晶器中的流动控制研究[D].北京:北京科技大学,2020.
[19]	董伊康,刘天武,罗扬,等.板坯连铸结晶器内流场与钢-渣界面波动性数值模拟分析[J].铸造技术,2018,39(10):2332.
[20]	陈威.连铸过程钢液多相流动、传热、凝固及夹杂物捕获的大涡模拟研究[D].北京:北京科技大学,2021.
[21]	李康康.高拉速条件下电磁制动对薄板坯结晶器钢液流动的影响[D].唐山:华北理工大学,2021.
[22]	黄财德,何文远,刘延强,等.电磁制动对镀锡板高拉速结晶器内流场的影响[J].钢铁,2019,54(8):90.