转炉双渣炼钢工艺对脱磷影响的研究
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- 英文论文题名：Study on the Double Slag Converter Steelmaking Process for Dephosphorization
- 论文作者：王杨 ; 王峰 ; 杨树峰 ; 李京社
- 英文论文作者：WANG Yang ; WANG Feng ; YANG Shu-feng ; LI Jing-she ; School of Metallurgical and Ecological Engineering ; University of Science and Technology Beijing ; Hesteel Group Tangsteel Company
- 年：2016
- 作者机构：北京科技大学冶金与生态工程学院钢铁冶金系;河北钢铁集团唐钢公司;
- 论文关键词：双渣 ; 脱磷 ; 转炉 ; 石灰石消耗
- 英文论文关键词：Double slag ; Dephosphorization ; Converter ; Lime consumption
- 会议召开时间：2016-12-02
- 会议录名称：第八届中国金属学会青年学术年会论文集
- 语种：中文
- 分类号：TF713
- 学会代码：ZGJS
- 会议名称：第八届中国金属学会青年学术年会
- 会议地点：中国辽宁沈阳
- 主办单位：中国金属学会
- 学会名称：中国金属学会
- 页数：6
- 文件大小：952k
- 原文格式：O
- 会议级别：全国
摘要
双渣法炼钢工艺能够实现低磷钢、超低磷钢的冶炼,同时还可以减少炼钢用石灰、白云石消耗量以及炼钢渣量。本文通过对唐钢公司150t转炉进行双渣炼钢工业试验,分析了双渣工艺对转炉冶炼脱磷率以及物料消耗的影响。结果表明:双渣炼钢工艺能够充分利用转炉冶炼前期温度低这一有利于脱磷反应的热力学条件实现快速高效脱磷。在脱磷阶段应当选用低碱度渣系(R在1.5~2.0),当炉渣碱度为1.7时,脱磷率达到最大值71%。采用双渣冶炼工艺后终点P含量由平均为0.018%降低至平均为0.011%,脱磷效率提高6%以上。基于高效脱磷,渣铁快速分离及倒渣等关键因素,在生产同等低[P]钢种的条件下,采用双渣冶炼工艺生产效率是提高的。因倒渣增加的时间与单渣法后吹脱[P]造成的冶炼周期增加相近,而钢铁料消耗和渣料消耗均明显降低。
The double slag converter steelmaking process can smelt low-and ultra-low-phosphorus steel and reduce lime and dolomite consumption and the amount of final slag simultaneously.Industrial steelmaking tests on a 150-metric ton converter at the Tangsteel Company were carried out to study this principle and its effect on the dephosphorization ratio and material consumption.The results showed that low-temperature stage could be used with a reduced amount of slag in the double slag steelmaking process to achieve rapid and efficient dephosphorization.A smelting process that uses double slag production requires a low-basicity slag(~1.5-2.0) in the dephosphorization stage.The dephosphorization ratio reached a maximum of 71%when the slag basicity was 1.7.The end-point phosphorus content after the smelting process(which produces less slag) was reduced from an average of 0.018%to an average of 0.011%and the dephosphorization efficiency increased by more than 6%.Based on key factors such as an efficient dephosphorization and a rapid iron-slag separation,the production efficiency was improved and the smelting cycle increased by only four minutes over the conventional process.
The double slag converter steelmaking process can smelt low-and ultra-low-phosphorus steel and reduce lime and dolomite consumption and the amount of final slag simultaneously.Industrial steelmaking tests on a 150-metric ton converter at the Tangsteel Company were carried out to study this principle and its effect on the dephosphorization ratio and material consumption.The results showed that low-temperature stage could be used with a reduced amount of slag in the double slag steelmaking process to achieve rapid and efficient dephosphorization.A smelting process that uses double slag production requires a low-basicity slag(~1.5-2.0) in the dephosphorization stage.The dephosphorization ratio reached a maximum of 71%when the slag basicity was 1.7.The end-point phosphorus content after the smelting process(which produces less slag) was reduced from an average of 0.018%to an average of 0.011%and the dephosphorization efficiency increased by more than 6%.Based on key factors such as an efficient dephosphorization and a rapid iron-slag separation,the production efficiency was improved and the smelting cycle increased by only four minutes over the conventional process.
引文
[1]王新华.氧气转炉“留渣+双渣”炼钢工艺技术研究[J].中国冶金,2013,23(4);40-43.
[2]Ogawa Y,Yano M,Kitamura S,et al.Development of the Continuous Dephosphorization and Decarburization Process Using BOF[J].Tetsu to Hagane-Journal of The Iron and Steel Institute of JAPAN,2001,87(1);21.
[3]Kitamura S Y,Yonezawa K,Ogawa Y,el al.Improvement of reaction efficiency in hot metal dephosphorization[J].Ironmaking&steelmaking,2002,29(2):121-124.
[4]Kume K.Success in Multi-Refining Converter(MURC)process at Oita steelmaking plant[J].Current Advances in Materials and Processes,2003,16(1):116-116.
[5]Kumakura M.Advances in Steel Refining Technology and Future Prospects[J].Nippon Steel Technical Report(104):2.
[6]Miyamoto K,Naito K,Kitagawa I,et al.Estimation of oxygen potential at slag/metal interface and effect of initial slag condition on hot metal dephosphorization[J].Tetsu to Hagane-Journal of the Iron and Steel Institute of JAPAN,2009,95(3):199-206.
[7]Ishikawa M.Reduction behaviors of hot metal dephosphorization slag in a slag regenerator[J].ISIJ international,2006,46(4):530-538.
[8]E.T.Turkdogan.Theoretical concept on slag-oxygen sensors to measure oxide activities related to FeO,SiO_2,and CaO contents of steelmaking slags[J].Ironmaking and Steelmaking,2000,27(1);32-36.
[9]Sasaki N,Ogawa Y,Mukawa S.Improvement in hot-metal dephosphorization[J].Nippon Steel Technical Report,2013,104:26-31.
[10]李伟东,杨明,何海龙.等.转炉“留渣+双渣”少渣炼钢工艺实践[J].鞍钢技术,2015,5:41-45.
[11]Emi T.Optimizing Steelmaking System for Quality Steel Mass Production for Sustainable Future of Steel Industry[J].Steel Research International,2014,85(8):1274-1282.
[12]Lundkvist K,Br(a|¨)mming M,Larsson M,et al.System analysis of slag utilisation from vanadium recovery in an integrated steel plant[J].Journal of Cleaner Production,2013,47:43-51.
[13]Yang Xiao,sun feng-mei,yang jin-li,liu fei,et al.Optimization of Low Phosphorus Steel Production with Double Slag Process in BOF[J].Journal of Iron and Steel Research,International.2013,20(8):41-47.
[14]Zhou C,Li J,Shi C,et al.Dependence of Temperature and Slag Composition on Dephosphorization at the First Deslagging in BOF Steelmaking Process[J].High Temperature Materials and Processes.
[15]Dippenaar R.Industrial uses of slag(the use and re—use of iron and steelmaking slags)[J],Ironmaking&steelmaking,2005,32(1):35-46.
[16]Diao J,Xie B,Wang Y,et al.Recovery of phosphorus from dephosphorization slag produced by duplex high phosphorus hot metal refining[J].ISIJ international,2012,52(6):955-959.
[17]E.T.Turkdogan.Assessment of P_2O_5 Activity Coefficients in Molten Slags[J].ISIJ International,2000,40(10);964-970.
[2]Ogawa Y,Yano M,Kitamura S,et al.Development of the Continuous Dephosphorization and Decarburization Process Using BOF[J].Tetsu to Hagane-Journal of The Iron and Steel Institute of JAPAN,2001,87(1);21.
[3]Kitamura S Y,Yonezawa K,Ogawa Y,el al.Improvement of reaction efficiency in hot metal dephosphorization[J].Ironmaking&steelmaking,2002,29(2):121-124.
[4]Kume K.Success in Multi-Refining Converter(MURC)process at Oita steelmaking plant[J].Current Advances in Materials and Processes,2003,16(1):116-116.
[5]Kumakura M.Advances in Steel Refining Technology and Future Prospects[J].Nippon Steel Technical Report(104):2.
[6]Miyamoto K,Naito K,Kitagawa I,et al.Estimation of oxygen potential at slag/metal interface and effect of initial slag condition on hot metal dephosphorization[J].Tetsu to Hagane-Journal of the Iron and Steel Institute of JAPAN,2009,95(3):199-206.
[7]Ishikawa M.Reduction behaviors of hot metal dephosphorization slag in a slag regenerator[J].ISIJ international,2006,46(4):530-538.
[8]E.T.Turkdogan.Theoretical concept on slag-oxygen sensors to measure oxide activities related to FeO,SiO_2,and CaO contents of steelmaking slags[J].Ironmaking and Steelmaking,2000,27(1);32-36.
[9]Sasaki N,Ogawa Y,Mukawa S.Improvement in hot-metal dephosphorization[J].Nippon Steel Technical Report,2013,104:26-31.
[10]李伟东,杨明,何海龙.等.转炉“留渣+双渣”少渣炼钢工艺实践[J].鞍钢技术,2015,5:41-45.
[11]Emi T.Optimizing Steelmaking System for Quality Steel Mass Production for Sustainable Future of Steel Industry[J].Steel Research International,2014,85(8):1274-1282.
[12]Lundkvist K,Br(a|¨)mming M,Larsson M,et al.System analysis of slag utilisation from vanadium recovery in an integrated steel plant[J].Journal of Cleaner Production,2013,47:43-51.
[13]Yang Xiao,sun feng-mei,yang jin-li,liu fei,et al.Optimization of Low Phosphorus Steel Production with Double Slag Process in BOF[J].Journal of Iron and Steel Research,International.2013,20(8):41-47.
[14]Zhou C,Li J,Shi C,et al.Dependence of Temperature and Slag Composition on Dephosphorization at the First Deslagging in BOF Steelmaking Process[J].High Temperature Materials and Processes.
[15]Dippenaar R.Industrial uses of slag(the use and re—use of iron and steelmaking slags)[J],Ironmaking&steelmaking,2005,32(1):35-46.
[16]Diao J,Xie B,Wang Y,et al.Recovery of phosphorus from dephosphorization slag produced by duplex high phosphorus hot metal refining[J].ISIJ international,2012,52(6):955-959.
[17]E.T.Turkdogan.Assessment of P_2O_5 Activity Coefficients in Molten Slags[J].ISIJ International,2000,40(10);964-970.