水口浸入深度与拉坯速度对电磁制动下板坯结晶器内金属流动的影响

上海金属, 2012, 34(1): 53-62. doi: 10.3969/j.issn.1001-7208.2012.01.012

水口浸入深度与拉坯速度对电磁制动下板坯结晶器内金属流动的影响

贾皓 ^1, , 王敏 ^2, , 张振强 ^3, , 邓康 ^4, , 雷作胜 ^5, , 任忠鸣 ^6,

1.上海大学上海现代冶金与材料制备重点实验室,上海200072

2.上海大学上海现代冶金与材料制备重点实验室,上海200072

3.上海大学上海现代冶金与材料制备重点实验室,上海200072

4.上海大学上海现代冶金与材料制备重点实验室,上海200072

5.上海大学上海现代冶金与材料制备重点实验室,上海200072

6.上海大学上海现代冶金与材料制备重点实验室,上海200072

基金项目: 国家自然科学基金课题(50674066)

关键词：板坯连铸 , 结晶器 , 电磁制动 , 物理模拟

EFFECTS OF NOZZLE SUBMERGED DEPTH AND CASTING VELOCITY ON LIQUID METAL FLOW WITH EMBr IN CONTINUOUS CASTING OF SLAB

以水银为实验工质,通过物理模拟考察板坯连铸电磁制动时,水口浸入深度和拉坯速度对结晶器内液态金属流动的影响规律.采用超声波多普勒测速仪测量了在结晶器上部磁场B1 =0.18 T和下部磁场B2=0.5T的情况下,板坯结晶器(模型)内水银的流速分布.实验表明:(1)加大水口浸入深度整体上使液面水平流速下降,且提高该流动的稳定性(湍流度降低)；而当水口浸入深度过深时,会引起液面水平流向改变.(2)水口出流的射流流速及其对结晶器窄面的撞击强度,以及液面的水平流速与其湍流度依然随拉坯速度提高而增强；同时,结晶器窄面附近上、下回流区金属液的铅垂速度均趋增大,且上回流区金属液对窄面冲刷的相对强度表现为先升高后降低,而下回流区金属液对窄面冲刷的相对强度则呈持续增强趋势.

参考文献

[1]	Klaus Ttimmel;Sven Eckert;Gunter Gerbeth .Experimental Investigation of the Flow in a Continuous-Casting Mold under the Influence of a Transverse,Direct Current Magnetic Field[J].Metallurgical and Materials Transactions B:Process Metallurgy and Materials Processing Science,2011,42B:68-80.
[2]	KEVIN CUKIERSKI;BRIAN G. THOMAS .Flow Control with Local Electromagnetic Braking in Continuous Casting of Steel Slabs[J].Metallurgical and Materials Transactions, B. Process metallurgy and materials processing science,2008(1):94-107.
[3]	Baokuan Li;Fumitaka Tsukihashi .Effects of Electromag-netic Brake on Vortex Flows in Thin Slab Continuons Casting Mold[J].ISIJ International,2006,26:1833-1838.
[4]	Hanada H.Effect of Density Difference of Molten Steels on the Mixing in Strand Pool in the Sequential Casting of Different Steel Grades with a Level DC Magnetic Field[J].Current Advances in Materials and Processes,1999(12):830.
[5]	H. HARADA;T. TOH;T. ISHII .Effect of Magnetic Field Conditions on the Electromagnetic Braking Efficiency[J].ISIJ International,2001(10):1236-1244.
[6]	Yun-Seong HWANG .Numerical Analysis of the Influences of Operational Parameters on the Fluid Flow and Meniscus Shape in Slab Caster with EMBR[J].ISIJ International,1997(7):659-667.
[7]	张永杰,温宏权.板坯连铸电磁制动技术发展20年[J].世界钢铁,2001(04):6-10.
[8]	徐愧儒,刘光穆,孟征兵,尹延波.电磁制动对CSP结晶器内坯壳冲击和弯月面温度的影响[J].特殊钢,2006(01):11-14.
[9]	Klaus TIMMEL;Sven ECKERT;Gunter GERBETH;Frank STEFANI;Thomas WONDRAK .Experimental Modeling of the Continuous Casting Process of Steel Using Low Melting Point Metal Alloys—the LIMMCAST Program[J].ISIJ International,2010(8):1134-1141.
[10]	于湛,雷作胜,贾洪海,金小礼,任忠鸣,邓康,钟云波.液态金属流速的测量技术[J].上海金属,2007(02):54-58.

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