D0L:10.13374M.issm1001-053x.2011.s1.014 第33卷增刊1 北京科技大学学报 Vol.33 Suppl.1 2011年12月 Journal of University of Science and Technology Beijing Dec.2011 超低碳铝镇静钢方坯连铸工艺 马富平12)包燕平)凶王毓男)王敏” 1)北京科技大学钢铁治金新技术国家重点实验室，北京1000832)邢台钢铁有限责任公司，邢台054027 ☒通信作者，E-mail:baoyp@usth.cdu.cn 摘要为了对超低碳铝镇静钢的生产工艺进行优化研究，结合某钢铁厂的现有工艺装备和条件，经过大量试验研究，确立 了转炉一LF一RH一连铸机的工艺路线，并实施转炉初炼钢水质量控制、钢包顶渣改制及成分控制、RH工艺优化及钙处理等 工艺优化措施.工艺流程优化后，控制转炉初炼钢水出钢氧的质量分数为0.04%-0.08%，终点碳0.03%-0.05%%，钢包顶 渣改制后F0+Mn0<3%,钙处理钢中Ca的质量分数达到0.002%~0.003%，解决了方坯连铸中包水口絮流的技术难题，实 现了超低碳铝镇静钢方坯顺利浇铸，连浇炉数达到8炉以上，达到了成品碳含量[C]<50×106,全氧含量≤30×10~6的较好 质量水平 关键词超低碳钢：连铸：方坯：工艺优化 分类号T℉777.2 Continuous casting process of ultra low carbon aluminum killed steel for blooms MA Fu-ping2,BAO Yan-ping",WANG Yu-nan,WANG Min 1)State Key Laboratory of Advanced Metallurgy.University of Science and Technology Beijing.Beijing 100083.China 2)Xingtai Iron and Steel Co..Ltd.Xingtai 054027.China Corresponding author,E-mail:baoyp@ustb.edu.en ABSTRACT In order to optimize the production process of ultra low carbon aluminium killed steel blooms,a large number of experi- ments were conducted on the basis of the existing equipment and process conditions in certain iron and steel plant and the BOF-LF-RH- bloom caster process was established.A series of optimizing measures were practiced,such as quality control of initial converter molten steel,ladle top slag modification and content control,process optimization for RH,and calcium treatment.The process parameters were obtained after taking the optimizing measures:the oxygen content,0.04%to 0.08%:the final carbon content,0.035%to 0.05%:the Fe0+MnO)content after adjusting the refining slag,<3%:and the [Ca]content after calcium treatment,0.002%to 0.003%.As a result,the problem of nozzle clogging has been solved,the average heats of continuous casting has increased to more than 8 heats,and the quality of final products has already reached a high level:the carbon content <50x10 and the total oxygen content≤30×10-6 KEY WORDS ultra low carbon steel;continuous casting:blooms:process optimization 邢钢于2007年建设一条精品钢生产线，主要工着连铸连浇炉数的提高，最多连浇2~3炉，给公司 艺装备包括一座80t顶底复吹转炉、一座80tLF精造成巨大损失.本文旨在对邢钢超低碳钢生产工艺 炼炉、一座80tRH真空精炼炉和一台四机四流大方 流程进行优化，对工艺过程参数进行摸索，解决方坯 坯连铸机，由于配备了H真空处理设施，具备了开 连铸过程中包水口絮流的技术难题，实现超低碳铝 发超低碳钢的硬件条件，为搭建高效低成本洁净钢 镇静钢方坯顺利浇注，实现连浇炉数8炉以上，成品 平台提供了基础1-.在开发初期，经常出现中包水碳含量[C]<50×10-6,全氧含量≤30×10-6的高 口絮流造成连铸无法顺行、生产中断事故，严重制约 要求标准，满足客户需求。 收稿日期：201108-12 基金项目：国家自然科学基金资助项目(51074019)第 33 卷 增刊 1 2011 年 12 月 北京科技大学学报 Journal of University of Science and Technology Beijing Vol． 33 Suppl． 1 Dec． 2011 超低碳铝镇静钢方坯连铸工艺 马富平1，2) 包燕平1) 王毓男1) 王 敏1) 1) 北京科技大学钢铁冶金新技术国家重点实验室，北京 100083 2) 邢台钢铁有限责任公司，邢台 054027 通信作者，E-mail: baoyp@ ustb． edu． cn 摘 要 为了对超低碳铝镇静钢的生产工艺进行优化研究，结合某钢铁厂的现有工艺装备和条件，经过大量试验研究，确立 了转炉—LF—RH—连铸机的工艺路线，并实施转炉初炼钢水质量控制、钢包顶渣改制及成分控制、RH 工艺优化及钙处理等 工艺优化措施． 工艺流程优化后，控制转炉初炼钢水出钢氧的质量分数为 0. 04% ～ 0. 08% ，终点碳 0. 03% ～ 0. 05% % ，钢包顶 渣改制后 FeO + MnO ＜ 3% ，钙处理钢中 Ca 的质量分数达到 0. 002% ～ 0. 003% ，解决了方坯连铸中包水口絮流的技术难题，实 现了超低碳铝镇静钢方坯顺利浇铸，连浇炉数达到 8 炉以上，达到了成品碳含量［C］＜ 50 × 10 － 6 ，全氧含量≤30 × 10 － 6 的较好 质量水平． 关键词 超低碳钢; 连铸; 方坯; 工艺优化 分类号 TF777. 2 Continuous casting process of ultra low carbon aluminum killed steel for blooms MA Fu-ping1，2) ，BAO Yan-ping1) ，WANG Yu-nan1) ，WANG Min1) 1) State Key Laboratory of Advanced Metallurgy，University of Science and Technology Beijing，Beijing 100083，China 2) Xingtai Iron and Steel Co． ，Ltd． ，Xingtai 054027，China Corresponding author，E-mail: baoyp@ ustb． edu． cn ABSTRACT In order to optimize the production process of ultra low carbon aluminium killed steel blooms，a large number of experi￾ments were conducted on the basis of the existing equipment and process conditions in certain iron and steel plant and the BOF-LF-RH￾bloom caster process was established． A series of optimizing measures were practiced，such as quality control of initial converter molten steel，ladle top slag modification and content control，process optimization for RH，and calcium treatment． The process parameters were obtained after taking the optimizing measures: the oxygen content，0. 04% to 0. 08% ; the final carbon content，0. 035% to 0. 05% ; the ( FeO + MnO) content after adjusting the refining slag，＜ 3% ; and the［Ca］content after calcium treatment，0. 002% to 0. 003% ． As a result，the problem of nozzle clogging has been solved，the average heats of continuous casting has increased to more than 8 heats，and the quality of final products has already reached a high level: the carbon content ＜ 50 × 10 － 6 and the total oxygen content ≤30 × 10 － 6 ． KEY WORDS ultra low carbon steel; continuous casting; blooms; process optimization 收稿日期: 2011--08--12 基金项目: 国家自然科学基金资助项目( 51074019) 邢钢于 2007 年建设一条精品钢生产线，主要工 艺装备包括一座 80 t 顶底复吹转炉、一座 80 t LF 精 炼炉、一座80 t RH 真空精炼炉和一台四机四流大方 坯连铸机，由于配备了 RH 真空处理设施，具备了开 发超低碳钢的硬件条件，为搭建高效低成本洁净钢 平台提供了基础［1--2］． 在开发初期，经常出现中包水 口絮流造成连铸无法顺行、生产中断事故，严重制约 着连铸连浇炉数的提高，最多连浇 2 ～ 3 炉，给公司 造成巨大损失． 本文旨在对邢钢超低碳钢生产工艺 流程进行优化，对工艺过程参数进行摸索，解决方坯 连铸过程中包水口絮流的技术难题，实现超低碳铝 镇静钢方坯顺利浇注，实现连浇炉数 8 炉以上，成品 碳含量［C］＜ 50 × 10 － 6 ，全氧含量≤30 × 10 － 6 的高 要求标准，满足客户需求． DOI:10.13374/j.issn1001-053x.2011.s1.014