用户名: 密码: 验证码:
攀钢炼钢过程钢水氮含量控制技术研究
详细信息    查看官网全文
摘要
本文针对攀钢重点品种钢氮含量偏高的问题,对炼钢全流程氮含量变化规律进行了调研,确定了转炉终点钢水氮含量偏高、出钢过程增氮严重、精炼结束至中包增氮严重是导致氮含量偏高的主要原因,并针对性地提出了"转炉低氮钢冶炼技术"、"两步脱氧控制出钢过程增氮技术"、"双氩封长水口保护浇注技术"等氮含量控制的关键技术,使得转炉终点钢水氮含量平均能控制在13×10~(-6)以内,出钢过程及精炼结束至中包增氮控制在5×10~(-6)以内。炼钢全流程氮含量控制技术应用后,板坯大梁钢、电工钢、IF钢成品氮含量分别为30.3×10~(-6)、18.2×10~(-6)、16.3×10~(-6),方坯重轨钢和帘线钢成品氮含量平均为4.8×10~(-6)、38.2×10~(-6),铸坯氮含量波动范围更小,控制更为稳定,攀钢低氮品种钢氮含量控制水平得到了大幅度的提升。
To solve the problem of high nitrogen content of key steel grades of Pan Gang Group,researches have been carried out on the change law of nitrogen during steelmaking process,and finally made sure that high nitrogen content at end-point of converter,serious nitrogen absorption during tapping and after secondary refining was the main factors.So,corresponding measures such as low nitrogen blowing technology,two-step deoxidization technology and double Argon sealing long nozzle protecting casting technology were put forwarded,which made the average nitrogen content at end-point of converter less than 13×10~(-6),nitrogen absorption amount during tapping and after secondary refining less than 5×10~(-6).By using the nitrogen control technology during the steelmaking process,average nitrogen content of the beam steel slab,electrical steel and IF steel were 30.3×10~(-6)、18.2×10~(-6)、16.3×10~(-6) respectively,which of the heavy railway bloom and tire cord steel were 40.8×10~(-6)and 38.2×10~(-6),nitrogen content of the casting billet was more stable,and which made the nitrogen control level during the production of low-nitrogen-steelmaking of Pang Gang Group improved greatly.
引文
[1]董汉君,陈志平,冷祥贵等.炼钢各工序增氮情况试验研究[J].梅山科技,2004(3):22-24.
    [2]崔阳,冯军,南晓东,白永立,包春林,周德光,朱立新.转炉吹炼末期钢中氮含量控制技术[J].炼钢,2010,04:75-78.
    [3]赵元,李具中等.汽车面板钢中氮控制技术的研究与实践[J].炼钢.2010,26(2),23.
    [4]李伟东,孙群,林洋.IF钢氮含量控制技术研究[J].钢铁.2010,45(7):32.
    [5]蒋晓放,郑贻裕.黄宗泽.宝钢洁净钢生产技术的发展与进步[A].第三届中德(欧)冶金技术研讨会论文集[C].2011.
    [6]石磊,易卫东,区铁,王光进,王国平.提高重轨钢洁净度的试验[J].武钢技术.2011(03).
    [7]R.Tsujino.M.Kojima.Production Technology of High Purity Steel for High Class Line Pipes and Cold Sheets.Tetsu·to-Hagane,1990(76):1948-1955.
    [8]陈家祥.钢铁冶金学(炼钢部分)[M].北京:冶金工业出版社,1990:91.
    [9]黄希祜.钢铁冶金学.北京:冶金工业出版社,2006:388.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700