四流中间包控流装置优化物理模拟
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摘要
通过中间包物理模拟的试验方法对某钢厂四流中间包进行控流装置优化,优化试验分为挡墙类型优化和挡墙结构优化。结果表明,原型方案流体流动状态很差,导流孔孔径过大易导致短路流现象的发生,死区比例也高达34.16%。优化后的最优方案中Y3死区比例降幅高达33.14%,流体平均停留时间由原型的761.2延长至900.7s,滞止时间则由32.2延长至76.7s,优化效果显著,说明最优方案可以显著地提高中间包体积利用率,并改善钢液的流动状态,有利于冶金质量的提高。
Optimization of flow control devices for four-strand tundish in a steel plant was investigated by physical simulation.The optimization experiment was divided into the optimization of baffles type and the optimization of baffles structure.The experimental results showed that the flow state of the fluid in the prototype scheme was very poor,and the excessive diameter of the diversion orifice could easily lead to short-circuit flow,and the proportion of dead zone was as high as 34.16%.The proportion of dead zone in the optimized scheme Y3 was decreased by33.14%.The average residence time of the fluid was extended from 761.2 to 900.7 s,and the stagnation time was extended from 32.2 to 76.7 s.The optimization effect was remarkable.It showed that the optimum scheme could significantly improve the utilization ratio of ladle volume and the flow state of molten steel,which was conducive to the improvement of metallurgical quality.
Optimization of flow control devices for four-strand tundish in a steel plant was investigated by physical simulation.The optimization experiment was divided into the optimization of baffles type and the optimization of baffles structure.The experimental results showed that the flow state of the fluid in the prototype scheme was very poor,and the excessive diameter of the diversion orifice could easily lead to short-circuit flow,and the proportion of dead zone was as high as 34.16%.The proportion of dead zone in the optimized scheme Y3 was decreased by33.14%.The average residence time of the fluid was extended from 761.2 to 900.7 s,and the stagnation time was extended from 32.2 to 76.7 s.The optimization effect was remarkable.It showed that the optimum scheme could significantly improve the utilization ratio of ladle volume and the flow state of molten steel,which was conducive to the improvement of metallurgical quality.
引文
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[10]田恩华,张健苹.七流中间包结构优化的物理模拟[J].中国冶金,2016,26(7):10.
[11]Sahai Y,Emi T.Melt flow characterization in continuous casting tundishes[J].ISIJ International,1996,36(6):667.
[12]Sahai Y,Burval M.Validity of Reynolds and Froude similarity criteria for water modeling of melt flow in tundishes[C]//50th Electric Furnace Conference Proceedings.Atlanta:[s.n.],1992:469.
[2]陈俊俊,武文斐,任雁秋,等.T型五流非对称连铸中间包内控流装置优化的水模拟实验[J].铸造技术,2006,27(7):719.
[3]蔡开科.连铸坯质量控制[M].北京:冶金工业出版社,2010.
[4]李京社,马昱,常国平,等.四流“L型”中间包控流装置优化的水模拟研究[J].钢铁钒钛,2010,31(1):30.
[5]王建军,包燕平,曲英.中间包冶金学[M].北京:冶金工业出版社,2001.
[6]熊玮,李全君.两流连铸中间包控流装置的优化设计[J].铸造技术,2012,33(10):1203.
[7]Craig K,Kock D,Makgata K,et al.Design optimization of a single-strand continuous caster tundish using residence time distribution data[J].ISIJ International,2001,41(10):1194.
[8]李永祥,程乃良,陈志平,等.三流Τ型中间包内控流装置优化的物理模拟[J].中国冶金,2008,18(2):29.
[9]ZHONG L,LI B,ZHU Y,et al.Fluid flow in a four-strand bloom continuous casting tundish with different flow modifiers[J].ISIJ International,2007,47(1):88.
[10]田恩华,张健苹.七流中间包结构优化的物理模拟[J].中国冶金,2016,26(7):10.
[11]Sahai Y,Emi T.Melt flow characterization in continuous casting tundishes[J].ISIJ International,1996,36(6):667.
[12]Sahai Y,Burval M.Validity of Reynolds and Froude similarity criteria for water modeling of melt flow in tundishes[C]//50th Electric Furnace Conference Proceedings.Atlanta:[s.n.],1992:469.