偏心M-EMS作用下连铸圆坯流动-传热模拟

doi:10.13228/j.boyuan.issn0449-749x.20200018

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Abstract In order to explore the effect of eccentric mold electromagnetic stirring (M-EMS) on the flow and heat transfer of molten steel in continuous casting round bloom and reduce the adverse effect of eccentric M-EMS on round bloom, a coupled three-dimensional mathematic model is established to study the flow and heat transfer characteristics of molten steel in Φ380 mm round bloom with eccentric M-EMS and the effects of M-EMS parameters. The results show that under the action of eccentric M-EMS(300 A/2 Hz): the molten steel entering the mold from the nozzle flows to the external arc side, and a large recirculation zone will be formed after molten steel hitting the arc side; the temperature of molten steel near the external arc side is higher than that near the inner arc side; as the distance from the meniscus increases, the temperature of the molten steel on the external arc side increases first and then decreases, the temperature at the center of the M-EMS is the highest at 1 779 K; the temperature of the molten steel on the inner arc side has been decreasing. As the current intensity increases from 100 A to 500 A, the recirculation zone under the round bloom changes from one to two; the temperature difference of the molten steel on the inner and external arc sides first decreases and then increases, which is the smallest at 300 A, and the temperature difference is 8.4 K. As the current frequency increases from 1 Hz to 5 Hz: the recirculation zone near the external arc side becomes smaller until it disappears. When the current frequency is less than 3 Hz, the temperature difference of the molten steel on the inner and external arc sides is less than 10 K, and when the frequency is greater than 3 Hz, the temperature difference is greater than 16 K. The recommended M-EMS parameter for Φ380 mm round bloom is 300 A/2 Hz.

Key words： mold electromagnetic stirring eccentric stirring round bloom temperature field flow field

Received: 13 January 2020

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	Articles by authors
	NIU Liang
	ZHAO Jun-xue
	QIU Sheng-tao
	TANG Wen-dan
	YANG Ling-zhi

Cite this article:

NIU Liang,ZHAO Jun-xue,QIU Sheng-tao等. Numerical simulation of flow and heat transfer in a continuous casting round bloom with eccentric M-EMS[J]. Iron and Steel, 2020, 55(9): 49-56.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20200018 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I9/49

[1] 徐洋. 连铸大圆坯的市场现状与发展趋势[J]. 工程技术,2016(58): 33.(XU Yang. Market status and development trend of continuous casting round bloom[J]. Engineering Technology, 2016(58): 33.)
[2] 王社教,倪红卫,尹修刚,等. Q345E低合金高强度钢Φ600 mm连铸圆坯的生产实践[J]. 特殊钢, 2013, 34(5):54.(WANG She-jiao, NI Hong-wei, YIN Xiu-gang, et al. Production practice of Φ600 mm round bloom of HSLA steel Q345E[J]. Special Steel,2013,34(5): 54.)
[3] 孙立明. 特大圆坯结晶器内钢液流场及传热的研究[D]. 秦皇岛: 燕山大学, 2013.(SUN Li-ming. Research on Steel Flow Field and Heat Transfer in Mold For Casting Super- Large Round Billet[D]. Qinghuangdao: Yanshan University, 2013.)
[4] 于海岐,朱苗勇. 圆坯结晶器电磁搅拌过程三维流场与温度场数值模拟[J]. 金属学报, 2008, 44(12): 1465.(YU Hai-qi, ZHU Miao-yong. 3D numerical simulation of flow field and temperature field in a round billet continuous casting mold with electromagnetic stirring[J]. Acta Metallurgica Sinica, 2008, 44(12): 1465.)
[5] 陈永,杨素波,朱苗勇. 结晶器电磁搅拌改善重轨钢连铸坯内部质量的试验研究[J]. 钢铁,2007, 42(2): 24.(CHEN yong, YANG Su-bo, ZHU Miao-yong. Improvement on internal quality of heavy rail steel bloom by mold electromagnetic stirring[J]. Iron and Steel,2007, 42(2): 24.)
[6] 吴明洋,陈良. Φ800 mm圆坯连铸机45钢生产工艺优化[J]. 中国冶金,2018, 28(4): 53.(WU Ming-yang, CHEN Liang. Process optimization 45 steel manufactured by Φ800 mm round billet caster[J]. China Metallurgy, 2018, 28(4): 53.)
[7] 朱苗勇. 新一代高效连铸技术发展思考[J].钢铁,2019,54(8):21.(ZHU Miao-yong. Some considerations for new generation of high-efficiency continuous casting technology development[J]. Iron and Steel, 2019, 54 (8): 21.)
[8] 吴耀光,陈远清,王学兵,等. 大圆坯结晶器电磁搅拌器磁场的数值模拟[J]. 钢铁研究学报, 2009, 21(7): 13.(WU Yao-guang, CHEN Yuan-qing, WANG Xue-bing, et al. Numerical simulation of magnetic field of mold electromagnetic stirrer for round bloom continuous casting[J]. Journal of Iron and Steel Research, 2009, 21(7): 13.)
[9] REN B, CHEN D, WANG H, et al. Numerical analysis of coupled turbulent flow and macroscopic solidification in a round bloom continuous casting mold with electromagnetic stirring[J]. Steel Research International, 2015, 86(9):1104.
[10] 郭李波,马忠存. 圆坯连铸机结晶器电磁搅拌的研究与实践[J]. 特钢技术, 2015, 21(7): 41.(GUO Li-bo, MA Zhong-cun. Research on mold electro magnetic stirring of round billet continuous casting machine and its practice[J]. Special Steel Technology, 2015, 21(7): 41.)
[11] 孙涛,岳峰,吴华杰,等. 结晶器电磁搅拌电流对Φ650 mm大圆坯内部质量的影响[J]. 特殊钢, 2015, 36(5): 43.(SUN Tao, YUE Feng, WU Hua-jie, et al. Effect of mold electromagnetic stirring current on internal quality of Φ650 mm heavy round bloom[J]. Special Steel,2015, 36(5): 43.)
[12] 任兵芝,陈登福,王宏丹,等. 大圆坯连铸结晶器电磁偏心搅拌的数值模拟[J]. 东北大学学报:自然科学版,2016, 37(6): 820.(REN Bing-zhi, CHEN Deng-fu, WANG Hong-dan, et al. Numerical simulation of electromagnetic field in round boom continuous casting mould with eccentric electromagnetic stirring[J].Journal of Northeastern University: Natural Science, 2016, 37(6): 820.)
[13] 张权企,董娟,夏冬冬. 大圆坯中心偏析成因解析及质量控制的思考[J]. 冶金与材料, 2017, 37(6): 8.(ZHANG Quan-qi, DONG Juan, XIA Dong-dong. Cause analysis and quality control of center segregation in large round bloom[J]. Metallurgy and Materials, 2017, 37(6): 8.)
[14] 张志宏,刘军利,刘伟平. 大圆坯中心偏析成因解析及质量控制[J]. 炼钢, 2013, 29(2):19.(ZHANG Zhi-hong, LIU Jun-li, LIU Wei-ping. Quality control and cause analysis on central segregation of round bloom[J]. Steelmaking, 2013,29(2): 19.)
[15] 赵菲,白明华,徐宽,等. 电磁搅拌作用下弧形结晶器流场的数值模拟[J]. 连铸, 2017,42(1): 13.(ZHAO Fei, BAI Ming-hua, XU Kuan, et al. Numerical simulation on flow field in curved mold with electromagnetic stirring[J]. Continuous Casting, 2017,42(1): 13.)
[16] 张静,王恩刚,邓安元,等.大方坯连铸M-EMS参数对磁场和流场分布的影响[J].钢铁,2012,47(6):27.(ZHANG Jing, WANG En-gang, DENG An-yuan, et al. Influence of M-EMS parameters on distribution of magnetic field and flow field in continuous casting of bloom[J]. Iron and Steel, 2012, 47 (6): 27.)
[17] 谢集祥,罗钢,刘浏,等.1 850 mm×230 mm板坯连铸结晶器流场与温度场数值模拟[J].中国冶金,2020,30(2):54.(XIE Ji-xiang, LUO Gang, LIU Liu, et al. Numerical simulation of flow and temperature field of 1 850 mm×230 mm slab in continuous casting mold[J]. China Metallurgy, 2020, 30(2): 54.)
[18] 王璞,李少翔,陈列,等. 电磁搅拌对大圆坯结晶器冶金行为影响的探讨[J]. 钢铁, 2019, 54(8):82.(WANG Pu, LI Shao-xiang, CHENG Lie, et al. Investigation of mold metallurgical behavior under electromagnetic stirring for round bloom[J]. Iron and Steel, 2019, 54(8):82.)