ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2014, Vol. 35 ›› Issue (1): 23-25.

• 工艺技术 • 上一篇    下一篇

防止超低碳铝镇静钢大方坯连铸水口堵塞的工艺实践

马富平1, 包燕1, 董志强2   

  1. 1北京科技大学冶金与生态工程学院,北京100083;
    2 邢台钢铁有限责任公司,邢台054027
  • 收稿日期:2013-08-20 出版日期:2014-02-01 发布日期:2022-09-05
  • 作者简介:马富平(1970-),男,博士研究生(北京科技大学),髙级工程师,1993年东北大学(本科)毕业,炼钢工艺技术研究。

Practice of Process to Prevent Nozzle Clogging During Bloom Concasting of Ultra-Low-Carbon Aluminium-Killed Steel

Ma Fuping1 , Bao Yanping1,  Dong Zhiqiang2   

  1. 1 School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing 100083 ;
    2 Xingtai Iron and Steel Corp Ltd, Xingtai 054027
  • Received:2013-08-20 Published:2014-02-01 Online:2022-09-05

摘要: 研究了铁水脱硫预处理-80 t顶底复吹转炉-LF-RH-280 mm×325 mm方坯连铸流程生产XGM6钢(/%:0.012C, ≤0.012Si, ≤0.08Mn,  ≤0.015P, ≤0.010S)等超低碳铝镇静钢时水口堵塞的原因和防止措施。通过控制转炉终点[O]≤600×10-6, LF顶渣为高铝渣+电石,RH-OB脱碳后加铝粒脱氧,控制RH终点氧含量20×10-6~30×10-6, RH终点[Al]s≤0.009%,中间包钢水过热度25~40℃,[Al]s≤0.004%等工艺措施,基本避免超低碳铝镇静钢水口堵塞,连浇炉数由不足2炉提高到8炉以上。

关键词: 超低碳铝镇静钢, 水口堵塞, 防止措施, [O] , [Al]s

Abstract: The cause and preventing measures for nozzle clogging during steelmaking process of ultra-low-carbon aluminium-killed steel such as XGM6 steel (/%: 0. 012C, ≤0. 012Si, ≤0. 08Mn, ≤0. 015P, ≤0.010S) produced by hot metal pre-desulphurization process-80 t top and bottom combined blown converter-LF-RH-280 mm x325 mm bloom concasting flow sheet have been studied. With using the process measures including controlling converter end [ O] ≤600 x 10-6, LF top slag- high alumina slag + carbide, deoxidizing by adding aluminium shot after RH-OB decarburisation, controlling RH end [O] 20 x 10-6 ~30 x 10-6, RH end [Al]≤ 0. 009%, tundish liquid superheating extent 25 ~40 °C and [Al]s≤0. 004%, the nozzle clogging of liquid of ultra-low-carbon aluminium-killed steel has basically been avoided, continuous- continuous casting heats increase from less than 2 heats to more than 8 heats.