新型侧底复吹真空精炼装置循环特性研究
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摘要
对某钢厂180 t RH真空精炼装置浸渍管结构改造并增加底吹氩气功能,通过数值方法对新型侧底复吹真空精炼装置内气液两相循环流动进行了模拟,并与实验数据进行了比较。结果表明:数值模拟所得到循环流量值与物理模拟所得到的实验数据有较好的一致性;侧吹0.8 m~3/h、底吹0.6 m~3/h时,循环流量达到最大数值0.227 m~3/h,新型结构用较小的吹氩流量即可达到传统RH的循环精炼效率,具有重要的应用前景。
The gas liquid flow-field,in the 180 t Ruhrstahl Hearaeus( RH) furnace modified by introduction of bottom blowing of argon,was empirically approximated,mathematically modeled,numerically simulated and experimentally evaluated. The impact of both the side-and bottom-blowing flow-rates on the mixing time of liquid steel and argon,their average circulation rates,their 3-D velocity profiles,and RH refining efficiency was investigated. The simulated results show that the modified RH furnace outperformed the conventional one. For example,the new RH furnace decreased the mixing-time by 41. 29% to 39 s and increased the maximum circulation rate to 0. 227 m~3/h at a side-blowing flow-rate of 0. 8 m~3/h and a bottom-blowing flow-rate of 0. 6 m~3/h,indicating that the conventional RH refining efficiency could be reached at a much lower argon flow rate for a shorter time. The simulated and measured results were found to be in fairly good agreement.
The gas liquid flow-field,in the 180 t Ruhrstahl Hearaeus( RH) furnace modified by introduction of bottom blowing of argon,was empirically approximated,mathematically modeled,numerically simulated and experimentally evaluated. The impact of both the side-and bottom-blowing flow-rates on the mixing time of liquid steel and argon,their average circulation rates,their 3-D velocity profiles,and RH refining efficiency was investigated. The simulated results show that the modified RH furnace outperformed the conventional one. For example,the new RH furnace decreased the mixing-time by 41. 29% to 39 s and increased the maximum circulation rate to 0. 227 m~3/h at a side-blowing flow-rate of 0. 8 m~3/h and a bottom-blowing flow-rate of 0. 6 m~3/h,indicating that the conventional RH refining efficiency could be reached at a much lower argon flow rate for a shorter time. The simulated and measured results were found to be in fairly good agreement.
引文
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[4]Drozdz P,Falkus J.The Modeling of Vacuum Steel Refining in the RH Degassing unit Based on Thermodynamic Analysis of the System[J].Archives of Meta llurgy and Materials,2007,52(4):585-591
[5]KISHAN P Anil,DASH Sukanta K.Prediction of Circulation Flow Rate in the RH Degasser Using Discrete Phase Particle Modeling[J].ISIJ International,2009,49(4):495-504
[6]Li B K,Tsukihashi F.Modeling of Circulating Flow in RH Degassing Vessel Water Model Designed for Two-and Multi-Legs Operations[J].ISIJ International,2000,40(12):1203-1209
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[11]Han Jie,Wang Xiaodong,Ba Dechun.Coordinated Analysis of Multiple Factors of Argon Blowing Parameters on the Effect of Circulation Flow Rate in RH Vacuum Refining Process[J].Vacuum,2014,109:68-73
[12]Han Jie,Wang Xiaodong,Ba Dechun.Simulation of Circulation Flow Field and Mixing Time in RH Vacuum Refining Process[J].Metalurgia International,2014,XIX(2-3):19-23
[13]孙亮,艾立群,赵俊花,等.RH精炼过程钢液流动行为与循环流量数值模拟[J].钢铁钒钛,2009,30(2):28-32
[14]王晓冬,王维娜.RH真空精炼吹氩参数对循环流动影响的数值分析[J].真空科学与技术学报,2009,29(6):682-685
[15]韩杰,王晓冬,巴德纯.RH真空精炼过程循环流量与混合特性的物理模拟,东北大学学报(自然科学版),2013,34(7):975-979
[16]耿佃桥,雷洪,赫冀成.侧底复吹RH精炼装置内的钢液流场及循环流量[J].东北大学学报(自然科学版),2011,32(8):1119-1123
[17]Taylor C,Morgan K.Recent Advances in Numerical Methods in Fluids[M].Pineridge Press,1980
[2]刘浏.RH真空精炼工艺与装备技术的发展[J].钢铁,2006,41(8):1-11
[3]Neves L,Oliveira HPO,Tavares RP.Evaluation of the Effects of Gas Injection in the Vacuum Chamber of a RH Degasser on Melt Circulation and Decarburization Rates[J].ISIJ International,2009,49(8):1141-1149
[4]Drozdz P,Falkus J.The Modeling of Vacuum Steel Refining in the RH Degassing unit Based on Thermodynamic Analysis of the System[J].Archives of Meta llurgy and Materials,2007,52(4):585-591
[5]KISHAN P Anil,DASH Sukanta K.Prediction of Circulation Flow Rate in the RH Degasser Using Discrete Phase Particle Modeling[J].ISIJ International,2009,49(4):495-504
[6]Li B K,Tsukihashi F.Modeling of Circulating Flow in RH Degassing Vessel Water Model Designed for Two-and Multi-Legs Operations[J].ISIJ International,2000,40(12):1203-1209
[7]韩杰,王晓冬,巴德纯,等.RH真空精炼吹氩喷嘴结构参数对循环流量影响的数值模拟[J].真空,2013,50(5):41-44
[8]Geng D Q,Lei H,He J C.Numerical Simulation of the Multiphase Flow in the Rheinsahl–Heraeus(RH)System[J].Metallurgical&Materials Transactions Part,2010,B41(1):234-247
[9]舒宏富,宋超,张晓峰,等.RH-MFB真空精炼过程中循环流量的物理模拟研究[J].材料与冶金学,2004,3(2):107-112
[10]艾新港,包燕平,吴华杰,等.RH精炼循环流量优化的水模型研究[J].特殊钢,2009,30(3):1-3
[11]Han Jie,Wang Xiaodong,Ba Dechun.Coordinated Analysis of Multiple Factors of Argon Blowing Parameters on the Effect of Circulation Flow Rate in RH Vacuum Refining Process[J].Vacuum,2014,109:68-73
[12]Han Jie,Wang Xiaodong,Ba Dechun.Simulation of Circulation Flow Field and Mixing Time in RH Vacuum Refining Process[J].Metalurgia International,2014,XIX(2-3):19-23
[13]孙亮,艾立群,赵俊花,等.RH精炼过程钢液流动行为与循环流量数值模拟[J].钢铁钒钛,2009,30(2):28-32
[14]王晓冬,王维娜.RH真空精炼吹氩参数对循环流动影响的数值分析[J].真空科学与技术学报,2009,29(6):682-685
[15]韩杰,王晓冬,巴德纯.RH真空精炼过程循环流量与混合特性的物理模拟,东北大学学报(自然科学版),2013,34(7):975-979
[16]耿佃桥,雷洪,赫冀成.侧底复吹RH精炼装置内的钢液流场及循环流量[J].东北大学学报(自然科学版),2011,32(8):1119-1123
[17]Taylor C,Morgan K.Recent Advances in Numerical Methods in Fluids[M].Pineridge Press,1980