含钛铁水转炉冶炼及其预脱钛行为研究  

Research on titanium-containing molten iron converter smelting and its pre-detitanium behavior

作　　者：李双江 张媛 张军国 张飞 卫广运 马浩冉 LI Shuangjiang;ZHANG Yuan;ZHANG Junguo;ZHANG Fei;WEI Guangyun;MA Haoran(Technology and Research Institute of HBIS Group,Shijiazhuang 050023,China;College of Science,Hebei University of Science and Technology,Shijiazhuang 050018,China;No.1 Steel Rolling Mill,Tangsteel Company of HBIS Group,Tangshan 063016,China)

机构地区：[1]河钢集团钢研总院,河北石家庄050023 [2]河北科技大学理学院,河北石家庄050018 [3]河钢集团唐钢公司第一钢轧厂,河北唐山063016

出　　处：《炼钢》2021年第1期23-26,38,共5页Steelmaking

基　　金：河北省青年拔尖人才支持计划项目([2016]10);河北科技大学博士科研启动基金项目(81/1181290)。

摘　　要：基于河钢集团唐钢公司150 t转炉含钛铁水冶炼实绩,采用冶金热力学分析和现场试验相结合的方法,研究了含钛铁水转炉造渣冶炼及其预处理喷氮预脱钛行为。研究结果表明:铁水钛的质量分数在0.12%以下时,转炉采用单渣法冶炼,可控制喷溅。向含钛铁水中喷吹氮气,促使氮化钛类物质析出,从而降低铁水钛含量的方法可行。铁水氮含量越高、温度越低,越有利于铁水脱钛反应的进行。平衡条件下,铁水温度和钛的质量分数分别控制在1573 K和0.12%时,铁水中平衡溶解氮的质量分数在13×10-6;铁水预处理喷氮气预脱钛,其脱钛率在20%左右。Based on the smelting performance of titanium-containing molten iron in a 150 t converter of HBIS Group Tangsteel Company, the behavior of titanium-containing molten iron converter slag making and its de-titanium pretreatment with nitrogen injection were studied with metallurgical thermodynamic analysis and field test. The results showed that the converter could control splash with single slag method when the titanium mass fraction controlled below 0.12 % in molten iron. The method of blowing nitrogen into the titanium-containing molten iron to promote the precipitation of titanium nitrides, thereby reducing the content of titanium in molten iron was feasible. It was beneficial for de-titanium reaction together with nitrogen mass fraction increasing and temperature decreasing in molten iron. When the temperature of molten iron and titanium mass fraction were controlled at 1 573 K and 0.12 % respectively, the balanced dissolved nitrogen mass fraction in molten iron was 13×10-6 under equilibrium conditions. The de-titanium rate was about 20 % in the process of de-titanium pretreatment by hot metal nitrogen injection.

关 键 词：含钛铁水 转炉 单渣法 热力学 预脱钛 

分 类 号：TF703[冶金工程—钢铁冶金]