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·1360 北京科技大学学报 第36卷 在主流股两侧形成单一的环流,结晶器自由液面基 2010,46(1):82 本成水平面.施加电磁搅拌后,结晶器钢液在横截 [6]Liu H P,Xu M G,Qiu S T,et al.Numerical simulation of fluid 面上旋转流动,纵截面上形成回流方向相反的上、下 flow in a round bloom mold with in-mold rotary electromagnetic stirring.Metall Mater Tran B,2012,40:1657 两个环流区.钢液的旋转速度和自由液面的波动幅 Zhang L S,Zhang X F,Wang B,et al.Numerical analysis of the 度随电流和频率的增加而增加.对于260mm×300 influences of operational parameters on braking effect of embr in mm轴承钢连铸,当电流300A、频率3Hz时,电磁搅 CSP funnel type mold.Metall Mater Trans B.2014,45(1):295 拌既可以保证钢液的搅拌强度,又可以避免结晶器 [8]Ren B Z,Zhu M Y,Wang H D,et al.3D numerical simulation of 自由液面的剧烈波动,有利于连铸坯质量的提高· electromagnetic field and flow field in bloom continuous casting mold with electromagnetic stirring.Acta Metall Sin,2008,44 4结论 (4):507 (任兵芝,朱苗勇,王宏丹,等.大方坯连铸结品器电磁搅拌三维 (1)采用有限元与有限体积结合的方法研究了 电磁场和流场的数值模拟.金属学报,2008,44(4):507) 电磁搅拌对结晶器流场和自由液面波动的影响,电 9] Yu H Q,Zhu M Y.3 numerical simulation of flow field and 磁搅拌装置中心轴线上磁感应强度的模拟结果与实 temperature field in a round billet continuous casting mold with electromagnetic stirring.Acta Metall Sin,2008,44(12):1456 测数据一致 (于海岐,朱苗勇.圆坯结品器电磁搅拌过程三维流场与温度 (2)在电磁搅拌作用下,钢液在水平截面上呈 场数值模拟.金属学报,2008,44(12):1465) 旋转流动,最大切向速度随电流和频率的增加而增 o] Zhang J,Wang E G,Deng A Y,et al.Influence of M-EMS pa- 大:在铸坯纵截面上,钢液流动出现上、下两对回流 rameters on distribution of magnetic field and flow field in contin- 方向相反的环流区,向下冲击的钢液与向上回流的 uous casting of bloom.fron Steel,2012,47(6):27 (张静,王恩刚,邓安元,等.大方坯连铸M-EMS参数对磁 钢液冲撞,使钢液的冲击深度变浅;电磁搅拌使结晶 场和流场分布的影响.钢铁,2012,47(6):27) 器自由液面波动加剧,电流在100~300A,频率在 [11]Yu Y,Li B K,Yang G.Numerical modeling of flow field in the 2~5Hz的范围内时,结晶器自由液面波动幅度的范 continuous casting process of steel under electromagnetic stirring. 围为0.77.4mm. J Unig Sci Technol Beijing,2011,33(2):157 (3)对于260mm×300mm的大方坯轴承钢连 (于祥,李宝宽,杨刚.钢连铸电磁搅拌工艺中流场的数值 铸,合理的结晶器电磁搅拌电流为300A,频率为3 模拟.北京科技大学学报,2011,32(2):157) 02] Zhang L S,Zhang X F,Wang B,et al.Effect of EMBR on the Hz.此时,连铸坯中心等轴晶率为26.2%,比未施 flow field and level fluctuation in CSP funnel type mold.Steel- 加电磁搅拌时提高了9.2%. making,2013,29(3):42 (张路莎,张晓峰,王宝,等.电磁制动对CSP漏斗型结品器 参考文献 流场和液面波动的影响.炼钢,2013,29(3):42) [Spitzer K H,Dubke M,Schwerdtfeger K.Rotational electromag- 03] Huang X,Thomas BG.Modeling of transient flow phenomena in netic stirring in continuous casting of round strands.Metall Trans continuous casting of steel.Can Metall 0,1998,37 (3/4):197 B,1986,17(1):119 [14]Lai K Y M,Salcudean M,Tanaka S,et al.Mathematical model- Ishii T,Sazhin S S,Makhlouf M.Numerical prediction of magne- ing of flow in large tundish systems in steelmaking.Metall Trans tohydrodynamic flow in continuous casting process.fronmaking B,1986,17:449 Steelmaking,1996,23 (3):267 05] Gan Y,Ni M S,Yu Z X.Practical Manual of Modern Continu- B]Okazawa K.Tom T,Fukuda J,et al.Fluid flow in a continuous ous Casting.Beijing:Metallurgical Industry Press,2010 casting mold driven by linear induction motors.IS//Int,2001,41 (干勇,倪满森,余志祥.现代连续铸钢实用手册.北京:治 (8):851 金工业出版社,2010) Pesteanu 0.Contribution to the flow calculation in electromagnetic 6] Mao B,Zhang G F,Li A W.Theory and Technology of Electro- stirrers for continuous casting.IS/J Int,2002,42(1):118 magnetic Stirring for Continuous Casting.Beijing:Metallurgical [5]Yu H Q,Zhu M Y.Three-dimensional magnetohydrodynamic cal- Industry Press,2012 culation for coupling multiphase flow in round billet continuous (毛斌,张桂芳,李爱武.连续铸钢用电磁搅拌的理论与技 casting mold with electromagnetic stirring.IEEE Trans Magn, 术.北京:治金工业出版社,2012)北 京 科 技 大 学 学 报 第 36 卷 在主流股两侧形成单一的环流,结晶器自由液面基 本成水平面. 施加电磁搅拌后,结晶器钢液在横截 面上旋转流动,纵截面上形成回流方向相反的上、下 两个环流区. 钢液的旋转速度和自由液面的波动幅 度随电流和频率的增加而增加. 对于 260 mm × 300 mm 轴承钢连铸,当电流 300 A、频率 3 Hz 时,电磁搅 拌既可以保证钢液的搅拌强度,又可以避免结晶器 自由液面的剧烈波动,有利于连铸坯质量的提高. 4 结论 ( 1) 采用有限元与有限体积结合的方法研究了 电磁搅拌对结晶器流场和自由液面波动的影响,电 磁搅拌装置中心轴线上磁感应强度的模拟结果与实 测数据一致. ( 2) 在电磁搅拌作用下,钢液在水平截面上呈 旋转流动,最大切向速度随电流和频率的增加而增 大; 在铸坯纵截面上,钢液流动出现上、下两对回流 方向相反的环流区,向下冲击的钢液与向上回流的 钢液冲撞,使钢液的冲击深度变浅; 电磁搅拌使结晶 器自由液面波动加剧,电流在 100 ~ 300 A,频率在 2 ~ 5 Hz 的范围内时,结晶器自由液面波动幅度的范 围为 0. 7 ~ 7. 4 mm. ( 3) 对于 260 mm × 300 mm 的大方坯轴承钢连 铸,合理的结晶器电磁搅拌电流为 300 A,频率为 3 Hz. 此时,连铸坯中心等轴晶率为 26. 2% ,比未施 加电磁搅拌时提高了 9. 2% . 参 考 文 献 [1] Spitzer K H,Dubke M,Schwerdtfeger K. Rotational electromag￾netic stirring in continuous casting of round strands. Metall Trans B,1986,17( 1) : 119 [2] Ishii T,Sazhin S S,Makhlouf M. Numerical prediction of magne￾tohydrodynamic flow in continuous casting process. Ironmaking Steelmaking,1996,23( 3) : 267 [3] Okazawa K,Tom T,Fukuda J,et al. Fluid flow in a continuous casting mold driven by linear induction motors. ISIJ Int,2001,41 ( 8) : 851 [4] Pesteanu O. Contribution to the flow calculation in electromagnetic stirrers for continuous casting. ISIJ Int,2002,42( 1) : 118 [5] Yu H Q,Zhu M Y. Three-dimensional magnetohydrodynamic cal￾culation for coupling multiphase flow in round billet continuous casting mold with electromagnetic stirring. IEEE Trans Magn, 2010,46( 1) : 82 [6] Liu H P,Xu M G,Qiu S T,et al. Numerical simulation of fluid flow in a round bloom mold with in-mold rotary electromagnetic stirring. Metall Mater Tran B,2012,40: 1657 [7] Zhang L S,Zhang X F,Wang B,et al. Numerical analysis of the influences of operational parameters on braking effect of embr in CSP funnel type mold. Metall Mater Trans B,2014,45( 1) : 295 [8] Ren B Z,Zhu M Y,Wang H D,et al. 3D numerical simulation of electromagnetic field and flow field in bloom continuous casting mold with electromagnetic stirring. Acta Metall Sin,2008,44 ( 4) : 507 ( 任兵芝,朱苗勇,王宏丹,等. 大方坯连铸结晶器电磁搅拌三维 电磁场和流场的数值模拟. 金属学报,2008,44( 4) : 507) [9] Yu H Q,Zhu M Y. 3-D numerical simulation of flow field and temperature field in a round billet continuous casting mold with electromagnetic stirring. Acta Metall Sin,2008,44( 12) : 1456 ( 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. 金属学报,2008,44( 12) : 1465) [10] Zhang J,Wang E G,Deng A Y,et al. Influence of M-EMS pa￾rameters on distribution of magnetic field and flow field in contin￾uous casting of bloom. Iron Steel,2012,47( 6) : 27 ( 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. 钢铁,2012,47( 6) : 27) [11] Yu Y,Li B K,Yang G. Numerical modeling of flow field in the continuous casting process of steel under electromagnetic stirring. J Univ Sci Technol Beijing,2011,33( 2) : 157 ( 于洋,李宝宽,杨刚. 钢连铸电磁搅拌工艺中流场的数值 模拟. 北京科技大学学报,2011,32( 2) : 157) [12] Zhang L S,Zhang X F,Wang B,et al. Effect of EMBR on the flow field and level fluctuation in CSP funnel type mold. Steel￾making,2013,29( 3) : 42 ( 张路莎,张晓峰,王宝,等. 电磁制动对 CSP 漏斗型结晶器 流场和液面波动的影响. 炼钢,2013,29( 3) : 42) [13] Huang X,Thomas B G. Modeling of transient flow phenomena in continuous casting of steel. Can Metall Q,1998,37( 3 /4) : 197 [14] Lai K Y M,Salcudean M,Tanaka S,et al. Mathematical model￾ing of flow in large tundish systems in steelmaking. Metall Trans B,1986,17: 449 [15] Gan Y,Ni M S,Yu Z X. Practical Manual of Modern Continu￾ous Casting. Beijing: Metallurgical Industry Press,2010 ( 干勇,倪满森,余志祥. 现代连续铸钢实用手册. 北京: 冶 金工业出版社,2010) [16] Mao B,Zhang G F,Li A W. Theory and Technology of Electro￾magnetic Stirring for Continuous Casting. Beijing: Metallurgical Industry Press,2012 ( 毛斌,张桂芳,李爱武. 连续铸钢用电磁搅拌的理论与技 术. 北京: 冶金工业出版社,2012) · 0631 ·
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