90t钢包底吹氩水模型与数值模拟
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摘要
为了获得90 t钢包最佳底吹氩位置,采用1∶4水模型试验和数值模拟对透气砖位于钢包底部不同位置时的均混时间进行了研究。结果表明,在单吹情况下,透气砖位于1/2R圆周上的P5点时,钢包内钢液具有较快的流动速度,均混时间最短;在双吹情况下,夹角为180°的组合式底吹搅拌效果较好,均混时间较低。通过对比分析得出,在相同气体流量条件下,单吹与双吹最优方案下的均混时间相差不大。
In order to obtain the optimum gas permeable brick position at the bottom of 90 t ladle and the gas blowing model,the effect of gas permeable brick positions on the mixing time is studied using the similarity ratio 1:4 water model and the numerical simulation. The results show that the mixing time with the position of P5 at 1/2R cycle is shorter than that of the others under the single gas permeable brick scheme conditions. Besides,the stirring effect of the double gas permeable brick scheme with the angle of 180°is better than that of others. By contrast,with same gas blowing rate the mixing time by using double gas permeable brick optimum scheme is similar with that by using the single gas permeable brick optimum scheme. To confirm the validity of the water model results,the effect of different bottom blowing model on the flow field of ladle are calculated using the ANSYS software. The results show that the numerical simulation is well agreement with the results of water model,and the fluid speed of hot metal in ladle when the single gas permeable brick position is P5 at 1/2R cycle is faster than that of others.
In order to obtain the optimum gas permeable brick position at the bottom of 90 t ladle and the gas blowing model,the effect of gas permeable brick positions on the mixing time is studied using the similarity ratio 1:4 water model and the numerical simulation. The results show that the mixing time with the position of P5 at 1/2R cycle is shorter than that of the others under the single gas permeable brick scheme conditions. Besides,the stirring effect of the double gas permeable brick scheme with the angle of 180°is better than that of others. By contrast,with same gas blowing rate the mixing time by using double gas permeable brick optimum scheme is similar with that by using the single gas permeable brick optimum scheme. To confirm the validity of the water model results,the effect of different bottom blowing model on the flow field of ladle are calculated using the ANSYS software. The results show that the numerical simulation is well agreement with the results of water model,and the fluid speed of hot metal in ladle when the single gas permeable brick position is P5 at 1/2R cycle is faster than that of others.
引文
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[2]任三兵,陈义盛.大型钢包双孔吹氩位置的探讨[J].包头钢铁学院学报,2003,22(3):193.(RENG San-bing,CHENG Yi-sheng.Research of dual bottom-blowing argon position of large ladle[J].Journal of Baotou Iron and Steel Research,2003,22(3):193.)
[3]艾新港,包燕平,吴华杰.钢包底吹氩卷渣临界条件的水模型研究[J].特殊钢,2009,30(2):7.(AI Xing-gang,BAO Yan-ping,WU Hua-jie,et al.A study on water modeling of ladle with bottom argon blowing in critical slag entrapment condition[J].Special Steel,2009,30(2):7.)
[4]阳方,沈巧珍,彭琦.100 t钢包底吹氩工艺优化研究[J].过程工程学报,2010,1(10):109.(YANG Fang,SHENG Qiao-zheng,PENG Qi.Optimization research of process for ladle bottom argon blowing[J].Journal of Process and Engineer,2010,1(10):109.)
[5]黄宗泽,任三兵,陈义盛.宝钢300 t LF物理模拟的试验研究[J].宝钢技术,2004(5):47.(HUANG Zong-ze,RENG San-bing,CHENG Yi-sheng.Research of physical simulation for Baosteel300 t ladle[J].Baosteel Technology,2004(5):47.)
[6]张龙强,田乃媛,徐安军.新建钢厂铁水预处理模型的选择[J].炼钢,2008,24(1):58.(ZHANG Long-qiang,TIAN Nai-yuan,XU An-jun.Selection of hot metal pretreatment mode for new steel-making plant[J].Steel Making,2008,24(1):58.)
[7]王晓晨,孙齐松,邸全康,等.薄腹板近终形异形连铸温度场数值模拟[J].钢铁,2013,48(12):36.(WANG Xiao-chen,SUN Qisong,DI Quan-kang,et al.Numerical simiulation of temperature distribution for thin-web beam blank near net-shape continuous casting[J].Iron and Steel,2013,48(12):36.)
[8]张兴中,郑学然,刘庆国,等.特大圆坯连铸用新型侵入式水口的设计与研究[J].钢铁,2013,48(12):46.(ZHANG Xingzhong,ZHENG Xue-ran,LIU Qing-guo,et al.Design and investigation of a novel submerged entry nozzle used in superlarge round bloom continuous casting[J].Iron and Steel,2013,48(12):46.)
[9]樊俊飞,张清朗,朱苗勇.六流T形连铸中间包内控流装置优化的水模型研究[J].钢铁,1998,33(5):24.(FAN Jun-fei,ZHANG Qin-lang,ZHU Miao-yong.Water modeling research of controling flowing equipment in six-strand T type continuous casting tundish[J].Iron and Steel,1998,33(5):24.)
[10]雷洪,朱苗勇,干勇.高速连铸结晶器内卷渣机理及其控制研究[J].钢铁,1999,34(8):20.(LEI Hong,ZHU Miao-yong,GAN Yong.Mechanism of slag entrapment and controlling research for high speed continuous casting mould[J].Iron and Steel,1998,34(8):20.)
[11]Sahay S K,De T K,Basu D S,et al.Strance performance improvement through use of asymmetric baffies in tundish of six strand billet caster at DSP[J].Iron and Steel,2001(7):71.
[12]Mazmamdar D,Guthire R I L.The physical and mathematical modeling of gas stirred ladle system[J].Application Math Modelling,1986,10(2):252.
[13]周俐,戴伟,曹成虎,等.120 t钢包底吹氩工艺水模型研究[J].特殊钢,2012,33(4):6.(ZHOU Li,DAI Wei,CAO Cheng-hu,et al.A study on water model for 120 t ladle bottom argon blowing process[J].Special Steel,2012,33(4):6.)
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