无取向电工钢冶炼过程氧含量控制  

Controlling Oxygen in Steelmaking Process of Non-Oriented Electrical Steel

作　　者：郭飞虎 仇圣桃[2] 乔家龙 刘磊 Guo Feihu;Qiu Shengtao;Qiao Ji along;Liu Lei(College of Metallurgical Engineering,Anhui University of Technology,Ma'anshan 243002;Engineering and Research Center for Continuous Casting Technology,Central Iron and Steel Research Institute,Beijing 100081)

机构地区：[1]安徽工业大学冶金工程学院,马鞍山243002 [2]钢铁研究总院连铸技术国家工程研究中心,北京100081

出　　处：《特殊钢》2019年第4期38-42,共5页Special Steel

基　　金：国家重点研发计划资助(2016YFB0300305)

摘　　要：取向硅钢的磁性能与钢的洁净度水平密切相关。为实现对无取向电工钢冶炼过程氧含量的合理控制,分析了无取向电工钢冶炼过程碳氧含量变化数据,热力学计算转炉终点临界碳含量与炉渣αFe0。结果表明:随着转炉终点碳含量的降低,终点氧含量升高且波动范围大,合理出钢碳含量应控制为0.03%-0.05%;为满足炉渣中T.Fe≤24%的现场生产要求,终点碳含量应高于0.031%;钢包底吹氮气可有效降低钢液中过剩氧,降低钢液的平均碳氧积;据现场生产数据.RH精炼前理想碳、氧含量应控制为0.025%~0.035%和500×10^-6-650×10^-6,相应转炉终点碳含量控制为0.03%~0.04%.The magnetic properties of non-oriented electrical steels are closely related to the cleanliness level.In order to achieve reasonable control of oxygen in non-oriented electrical steel smelting process,the change of carbon and oxygen content were analyzed,the critical carbon content at the end-point of BOF and aFe0 in slag were also calculated.The results show that with the decrease of end-point carbon content,the end-point oxygen content increases and fluctuates widely.The ideal carbon content in tapping should be controlled at 0.03%~0.05%.It is required that the content of T.Fe in slag should be≤24%and the end-point carbon content should be higher than 0.031%.Ladle botton argon blowing can effectively reduce excess oxygen and decrease carbon-oxygen product in molten steel.According to production data,the ideal carbon and oxygen content should be controlled at 0.025%-0.035%and 500×10^-6.650×10^-6 before RH refining,and the end-point carbon content of BOF should be controlled at 0.03%.0.04%.

关 键 词：无取向电工钢 转炉终点 RH精炼 氧含量 

分 类 号：TF713[冶金工程—钢铁冶金]