精炼渣与高锰高铝钢液的相互作用  

Interaction between refining slag and high manganese and high aluminum molten steel

作　　者：赵吉轩 朱航宇[1,2] 王伟胜 宋明明[2] 李建立[1] 薛正良[1,2] ZHAO Jixuan;ZHU Hangyu;WANG Weisheng;SONG Mingming;LI Jianli;XUE Zhengliang(Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081 [2]武汉科技大学钢铁冶金新工艺湖北省重点实验室,湖北武汉430081

出　　处：《钢铁研究学报》2021年第8期726-733,共8页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(52074199);国家自然科学基金联合基金重点资助项目(U20A20270)。

摘　　要：为了研究精炼渣与高锰高铝钢液相互作用规律,以CaO-5%SiO_(2)-Al_(2)O_(3)-8%MgO精炼渣与Fe-15Mn-10Al-0.7C高锰高铝钢液在1 600℃的渣金反应为研究对象,分别在渣金反应5、15、30、60和90 min时取钢样和渣样,通过钢液和渣成分变化进行了渣金反应动力学计算。结果表明:整个渣金反应过程中,钢液中[Al]和渣中SiO_(2)不断降低、渣中Al_(2)O_(3)不断增加;精炼渣与高锰高铝钢液反应前期限制性环节为[Al]在边界层的传质,反应后期渣成分发生改变、黏度升高以及渣中固相颗粒形成,使得SiO_(2)在渣中的传质条件恶化,SiO_(2)向反应界面的传质成为渣金反应的速率限制环节;精炼渣与高锰高铝钢反应分3个阶段:初期反应剧烈、中期渣金界面形成尖晶石层并阻碍渣金反应、后期反应趋于稳定。In order to study the interaction between refining slag and high-manganese and high-aluminum molten steel, a steel-slag reaction experiment between CaO-5%SiO_(2)-Al_(2)O_(3)-8%MgO refining slag and Fe-15 Mn-10 Al-0.7 C molten steel at 1 600 ℃ was performed. Steel and slag samples were taken and analyzed when the slag-metal reaction time was 5, 15, 30, 60 and 90 min respectively. In addition, the steel-slag reaction kinetics was calculated based on laboratory experiment. The results show that the [Al] content in molten steel and(SiO_(2)) content in slag decrease, while(Al_(2)O_(3)) increases during steel-slag reaction. The mass transfer of [Al] in the boundary layer is the controlled process in the early stage of the reaction. As the reaction proceeds, the composition and viscosity of slag obviously change, accompanied by the formation of solid parcitles, which makes the mass transfer of(SiO_(2)) to the reaction interface becoming the limited step. In summary, the interaction between refining slag and steel can be concluded to three stages:(1) Violent reaction during the initial stage;(2) The formation of spinel layer at the slag-metal interface;(3) Stable reaction stage.

关 键 词：低密度钢 高铝钢 高锰钢 精炼渣 渣金反应 

分 类 号：TF713[冶金工程—钢铁冶金]