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| Water flow field model and numerical simulation of 180 mm×610 mm slab continuous casting mold |
| WANG Wei1,2,3, ZHU Li-guang2,4, ZHANG Cai-jun1,2, ZHENG Quan5 |
1. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China;
2. Refractory Department, Hebei Engineering Research Center of High Quality Steel Continuous Casting, Tangshan 063000, Hebei, China;
3. Tangshan Jilong Industrial Co., Ltd., Tangshan 063017, Hebei, China;
4. Hebei University of Science and Technology, Shijiazhuang 050018, Hebei, China;
5. Steelmaking Department, Qian'an Iron and Steel Co., Ltd., Tangshan 064400, Hebei, China |
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Abstract A slab mold with a section of 180 mm×610 mm in a steel company in north China was taken as the prototype. In view of the problems such as large fluctuation of surface velocity and easy slag entrapment in the production process, the Fluent numerical simulation software was used to optimize the process parameters such as the bottom geometric structure of the submerged entry nozzle, the immersion depth and the casting speed of the immersion nozzle, and the numerical simulation results were verified by the cold water simulation. The results showed that when the bottom structure of the nozzle was not changed, and the immersion depth of the nozzle was 100 mm, the casting speed should be below 1.45 m/min. When the casting speed was increased to 1.55 m/min, the immersion depth should be kept at 120-130 mm. In order to maintain the original process conditions(casting speed of 1.55 m/min, immersion depth of 100 mm), the bottom structure of the nozzle should be changed to a concave nozzle with a groove depth of 10 mm. At this time, the surface velocity of the mold was suitable.
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Received: 08 August 2019
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| [1] |
ZHANG L F,YU F W,XIANG J Z.Flow transport and inclusion motion in steel continuous-casting mold under submerged entry nozzle clogging condition[J].Metallurgical and Materials Transactions B,2008,39(4):534.
|
| [2] |
罗衍昭.连铸结晶器水口不同浸入深度的数值模拟[J].中国冶金,2016,26(11):34.
|
| [3] |
王新华.高品质冷轧薄板钢中非金属夹杂物控制技术[J].钢铁,2013,48(9):1.
|
| [4] |
陆巧彤,杨荣光,王新华,等.板坯连铸结晶器内钢液表面流速水模研究[J].炼钢,2007,23(1):30.
|
| [5] |
张燕超,张彩军,刘毅.板坯连铸结晶器浸入式水口结构优化[J].铸造技术,2018,39(11):129.
|
| [6] |
Chaudhary R,Lee G-G,Thomas B G,et al.Transient mold fluid flow with well- and mountain-bottom nozzles in continuous casting of steel[J].Metallurgical and Materials Transactions B,2008,39(6):870.
|
| [7] |
颜慧成,朱果灵,张柏汀,等.连铸结晶器弯月面区域传热模拟[J].钢铁,1999,34(1):20.
|
| [8] |
Launder B E,Spalding D B.Lectures in Mathematical Models of Turbulence[M].London:Academic Press,1972.
|
| [9] |
JIANG P G,LAI C B.Numerical simulation of the flow field in a wide slab continuous casting mold[J].Chinese Journal of Engineering,2016,38(s1):50.
|
| [10] |
Miranda R.Experimental and numerical analysis of the free surface in a water model of a slab continuous casting mold[J].ISIJ International,2005,45(11):1626.
|
| [11] |
李济永,张立峰,王强强.板坯连铸结晶器内流场数值模拟[J].过程工程学报,2012,12(6):925.
|
| [12] |
张兴中,任素波,周超,等.新型结晶器内流场及温度场数值模拟[J].钢铁,2015,50(9):53.
|
| [13] |
吴哲,张彩军,刘毅,等.板坯连铸结晶器内钢液流场的水模拟研究[J].铸造技术,2017,38(8):145.
|
| [14] |
邓小旋,季晨曦,安泽秋,等.宽度对板坯连铸结晶器液面特征影响[J].钢铁,2017,52(8):48.
|
| [15] |
王翠娜,温良英,陈登福,等.板坯连铸结晶器内流场的数值模拟[J].过程工程学报,2009,9(增刊1):325.
|
| [16] |
邓小旋,季晨曦,何文远,等.板坯连铸结晶器液面的周期性瞬态特征[J].钢铁,2017,52(9):42.
|
|
|
|
2020, Vol. 30 
