D0L:10.13374f.issn1001-053x.2011.s1.012 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 铁水脱钛理论分析与实验研究 徐迎铁✉陈兆平》夏幸明2) 1)宝山钢铁股份有限公司研究院，上海2019002)宝山钢铁股份有限公司炼钢厂，上海200941 ☒通信作者，E-mail:xuyingtie(@baosteel..com 摘要通过对铁水喷粉脱钛热力学和动力学的分析，建立了动力学模型，计算得到在1350℃不同停留时间条件下喷吹不同 粒径的脱钛剂时，脱钛、脱硅和脱碳量的变化情况.宝钢鱼雷罐喷吹富含氧化铁的脱钛剂，根据实际停留时间的计算值，分析 得到其脱钛剂的颗粒直径在0.5~0.8mm比较合适.通过感应炉实验研究了脱钛剂的脱钛与脱硅规律，结果表明：脱钛和脱 硅基本同步进行，脱钛率与脱硅率比在0.8~1左右，30m内的脱硅率或脱钛率在40%~80%之间.由此可见，喷吹高含量 氧化铁的粉剂脱钛剂进行脱钛是首选，可取得良好的脱钛效果. 关键词脱钛：脱硅：铁水预处理：动力学 分类号T℉533.27 Theory analysis and experimental study on the removal of titanium from hot metal XU Ying-tieb,CHEN Zhao-ping",XIA Xing-ming? 1)Research Institute,Baoshan Iron and Steel Co.Ltd.,Shanghai 201900.China 2)Steel-making Plant,Baoshan Iron and Steel Co.Ltd.,Shanghai 201941,China Corresponding author,E-mail:xuyingtie@baosteel.com ABSTRACT Based on the analysis of thermodynamics and kinetics of the titanium removal process from hot metal by the powders in- jection,a kinetic model was built to calculate the removal amounts of titanium,silicon,and carbon with the change in residence time in hot metal for different sizes of injected particles.With the help of the calculated actual residence time,it can be concluded that the particle size of titanium removal agents with a high content of iron oxide in the range of 0.5 to 0.8 mm is more suitable for titanium re- moval.The experiment in the induction furnace was performed to study the relationship between titanium removal and silicon removal of the titanium removal agents.The results show that titanium removal and silicon removal proceed synchronously,the related ratio of tita- nium removal amount to silicon removal amount is in the range of 0.8 to I,and the removal efficiencies of titanium and silicon are both in 40%-80%after 30 min treatment.It is found that in the industrial practice,the particles injection with a high content of iron oxide as the titanium removal agent should be chosen firstly and the optimal effect can be attained. KEY WORDS titanium removal;silicon removal;hot metal pretreatment:dynamics Ti对0、N、C元素具有较强的亲和力，炼钢过 到的铁水钛含量偏高，有时达到600×10-6以上；高 程中，很容易与三者结合，形成TiO,和Ti(NC)等夹 钛含量的铁水进入转炉前如不将钛部分脱除，会导 杂物，这些夹杂物对钢的拉伸和疲劳性能有很大危 致转炉渣含氧化钛量过高，很难保证钢水脱氧后的 害.因此，部分专用钢种，例如电工钢、轴承钢、弹簧 钛含量在要求范围内[②.若冶炼钢种对钛含量有严 钢等，都对钢中T含量提出了严格要求)，希望Ti 格的要求，就有必要在出铁过程或铁水预处理过程 的质量分数小于或等于30×10-6，甚至10×10-6. 将钛部分脱除.本文对铁水脱钛过程的热力学和动 在宝钢高炉生产铁水过程中，部分使用含钛铁矿可 力学进行了分析，结合相关实验和生产实践，为铁水 在高炉服役后期利用析出的TC保护炉缸，由此得 合理脱钛提供技术支持. 收稿日期：201108-12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 铁水脱钛理论分析与实验研究 徐迎铁1) 陈兆平1) 夏幸明2) 1) 宝山钢铁股份有限公司研究院，上海 201900 2) 宝山钢铁股份有限公司炼钢厂，上海 200941 通信作者，E-mail: xuyingtie@ baosteel． com 摘 要 通过对铁水喷粉脱钛热力学和动力学的分析，建立了动力学模型，计算得到在 1 350 ℃不同停留时间条件下喷吹不同 粒径的脱钛剂时，脱钛、脱硅和脱碳量的变化情况． 宝钢鱼雷罐喷吹富含氧化铁的脱钛剂，根据实际停留时间的计算值，分析 得到其脱钛剂的颗粒直径在 0. 5 ～ 0. 8 mm 比较合适． 通过感应炉实验研究了脱钛剂的脱钛与脱硅规律，结果表明: 脱钛和脱 硅基本同步进行，脱钛率与脱硅率比在 0. 8 ～ 1 左右，30 min 内的脱硅率或脱钛率在 40% ～ 80% 之间． 由此可见，喷吹高含量 氧化铁的粉剂脱钛剂进行脱钛是首选，可取得良好的脱钛效果． 关键词 脱钛; 脱硅; 铁水预处理; 动力学 分类号 TF533. 27 Theory analysis and experimental study on the removal of titanium from hot metal XU Ying-tie 1) ，CHEN Zhao-ping1) ，XIA Xing-ming2) 1) Research Institute，Baoshan Iron and Steel Co． Ltd． ，Shanghai 201900，China 2) Steel-making Plant，Baoshan Iron and Steel Co． Ltd． ，Shanghai 201941，China Corresponding author，E-mail: xuyingtie@ baosteel． com ABSTRACT Based on the analysis of thermodynamics and kinetics of the titanium removal process from hot metal by the powders in￾jection，a kinetic model was built to calculate the removal amounts of titanium，silicon，and carbon with the change in residence time in hot metal for different sizes of injected particles． With the help of the calculated actual residence time，it can be concluded that the particle size of titanium removal agents with a high content of iron oxide in the range of 0. 5 to 0. 8 mm is more suitable for titanium re￾moval． The experiment in the induction furnace was performed to study the relationship between titanium removal and silicon removal of the titanium removal agents． The results show that titanium removal and silicon removal proceed synchronously，the related ratio of tita￾nium removal amount to silicon removal amount is in the range of 0. 8 to 1，and the removal efficiencies of titanium and silicon are both in 40% － 80% after 30 min treatment． It is found that in the industrial practice，the particles injection with a high content of iron oxide as the titanium removal agent should be chosen firstly and the optimal effect can be attained． KEY WORDS titanium removal; silicon removal; hot metal pretreatment; dynamics 收稿日期: 2011--08--12 Ti 对 O、N、C 元素具有较强的亲和力，炼钢过 程中，很容易与三者结合，形成 TiOx 和 Ti( NC) 等夹 杂物，这些夹杂物对钢的拉伸和疲劳性能有很大危 害． 因此，部分专用钢种，例如电工钢、轴承钢、弹簧 钢等，都对钢中 Ti 含量提出了严格要求［1］，希望 Ti 的质量分数小于或等于 30 × 10 － 6 ，甚至 10 × 10 － 6 ． 在宝钢高炉生产铁水过程中，部分使用含钛铁矿可 在高炉服役后期利用析出的 TiC 保护炉缸，由此得 到的铁水钛含量偏高，有时达到 600 × 10 － 6 以上; 高 钛含量的铁水进入转炉前如不将钛部分脱除，会导 致转炉渣含氧化钛量过高，很难保证钢水脱氧后的 钛含量在要求范围内［2］． 若冶炼钢种对钛含量有严 格的要求，就有必要在出铁过程或铁水预处理过程 将钛部分脱除． 本文对铁水脱钛过程的热力学和动 力学进行了分析，结合相关实验和生产实践，为铁水 合理脱钛提供技术支持． DOI:10.13374/j.issn1001-053x.2011.s1.012