40 t钢包底吹氩过程流热耦合的数值模拟
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摘要
根据宝钢40 t钢包底吹氩过程的现场资料,建立了钢包底吹氩过程钢水流热耦合的多相数值模型。并计算了吹氩量对钢水流场及温度场的影响。结果表明,钢包底吹氩过程主要影响的区域位于钢包上半部,并随着吹氩量的增加,影响区域扩大。钢包内钢液流动速度为0.02~0.04 m/s的区域所占比例最大,并随吹氩量的增加比例不断增大。钢包底部的死区比例随吹氩量的增加而减小。钢包底吹氩过程中钢包内的钢液主要通过顶部散热,钢液顶部会出现明显的温降,随着吹氩量的增加,钢液顶部温降更加显著。
Based on the actual data of 40 t bottom argon blowing process in Baosteel,a multiphase numerical model considering the flow-heat coupling field of liquid steel was established.The influences of argon flow rates on the flow field and temperature field of liquid steel were investigated by calculation. The results showed that the main influence area of ladle bottom blowing argon process was located in the upper part of ladle,and this area enlarged with the increase of argon flow rate. The liquid steel in ladle with the flow velocity ranging from 0. 02 m/s to 0. 04 m/s accounted for the largest proportion,and increased with the increase of argon flow rate. The dead zone ratio at the bottom of the ladle decreased with the increase of argon flow rate. During the ladle bottom blowing argon, the liquid steel in ladle was mainly cooled through the top part. The temperature drop of the liquid steel at the top part was obvious,and became more remarkable with the increase of argon flow rate.
Based on the actual data of 40 t bottom argon blowing process in Baosteel,a multiphase numerical model considering the flow-heat coupling field of liquid steel was established.The influences of argon flow rates on the flow field and temperature field of liquid steel were investigated by calculation. The results showed that the main influence area of ladle bottom blowing argon process was located in the upper part of ladle,and this area enlarged with the increase of argon flow rate. The liquid steel in ladle with the flow velocity ranging from 0. 02 m/s to 0. 04 m/s accounted for the largest proportion,and increased with the increase of argon flow rate. The dead zone ratio at the bottom of the ladle decreased with the increase of argon flow rate. During the ladle bottom blowing argon, the liquid steel in ladle was mainly cooled through the top part. The temperature drop of the liquid steel at the top part was obvious,and became more remarkable with the increase of argon flow rate.
引文
[1]韩建军,李士琦,吴龙.钢包底吹氩搅拌特性[J].北京科技大学学报,2011,33(9):1085-1090.
[2]马骏,沈巧珍,阳方,等.底吹氩钢包内三维流场的数值模拟[J].武汉科技大学学报,2010,33(2):124-128.
[3]张华,倪红卫,成日金,等.150 t钢包底吹氩工艺优化[J].炼钢,2009,25(5):8-11.
[4]钟良才,李壮,梁锋,等.120 t精炼钢包底吹氩物理模拟[J].过程工程学报,2010,10(S1):103-107.
[5]沈巧珍,吴曌环,阳方,等.100 t钢包底吹氩数值的模拟研究[J].武汉科技大学学报,2010,33(6):566-569.
[6]周云,董元篪,王海川,等.炉外精炼中钢包底吹氩流场的数学模拟[J].安徽工业大学学报(自然版),2002,19(2):91-94.
[7]李博斌.唐钢。50 t LF钢包底吹氩的优化研究[D].唐山:河北理工大学,2010.
[8]李有章,李顶宜.顶吹气体射流冲击下熔池内液体流场的研究[J].北京科技大学学报,1983(4):53-61.
[9]李晶,傅杰,周德光,等.60t钢包的传热分析[J].特殊钢,2001,22(4):16-18.
[10]李晶,傅杰,王平,等.钢包吹氩引起的钢水温降分析[J].炼钢,1998(5):46-48.
[11]朱苗勇,井本健夫,肖泽强.多孔喷吹钢包内流动和混合过程的数学物理模拟[J].金属学报,1995,31(22):435-439.
[12]WANG Q,HE Z,LI B K,et al.A general coupled mathematical model of electromagnetic phenomena,two-phase flow,and heat transfer in electroslag remelting process including conducting in the mold[J].Metallurgical and Materials Transactions B,2014,45(6):2425-2441.
[13]高旭东.钢包内钢水流热耦合场的数值模拟研究[D].沈阳:东北大学,2012.
[2]马骏,沈巧珍,阳方,等.底吹氩钢包内三维流场的数值模拟[J].武汉科技大学学报,2010,33(2):124-128.
[3]张华,倪红卫,成日金,等.150 t钢包底吹氩工艺优化[J].炼钢,2009,25(5):8-11.
[4]钟良才,李壮,梁锋,等.120 t精炼钢包底吹氩物理模拟[J].过程工程学报,2010,10(S1):103-107.
[5]沈巧珍,吴曌环,阳方,等.100 t钢包底吹氩数值的模拟研究[J].武汉科技大学学报,2010,33(6):566-569.
[6]周云,董元篪,王海川,等.炉外精炼中钢包底吹氩流场的数学模拟[J].安徽工业大学学报(自然版),2002,19(2):91-94.
[7]李博斌.唐钢。50 t LF钢包底吹氩的优化研究[D].唐山:河北理工大学,2010.
[8]李有章,李顶宜.顶吹气体射流冲击下熔池内液体流场的研究[J].北京科技大学学报,1983(4):53-61.
[9]李晶,傅杰,周德光,等.60t钢包的传热分析[J].特殊钢,2001,22(4):16-18.
[10]李晶,傅杰,王平,等.钢包吹氩引起的钢水温降分析[J].炼钢,1998(5):46-48.
[11]朱苗勇,井本健夫,肖泽强.多孔喷吹钢包内流动和混合过程的数学物理模拟[J].金属学报,1995,31(22):435-439.
[12]WANG Q,HE Z,LI B K,et al.A general coupled mathematical model of electromagnetic phenomena,two-phase flow,and heat transfer in electroslag remelting process including conducting in the mold[J].Metallurgical and Materials Transactions B,2014,45(6):2425-2441.
[13]高旭东.钢包内钢水流热耦合场的数值模拟研究[D].沈阳:东北大学,2012.