VD精炼技术的研究进展  

Research progress on VD refining technology

作　　者：易昌鑫 于会香[1] 刘金刚 贾刘兵 YI Changxin;YU Huixiang;LIU Jingang;JIA Liubing(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Research Institute of Technology of Shougang Group Co.,Ltd.,Beijing 100043,China;Technology Center of Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan 063210,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]首钢集团有限公司技术研究院,北京100043 [3]首钢京唐钢铁联合有限责任公司技术中心,河北唐山063210

出　　处：《炼钢》2024年第4期1-10,共10页Steelmaking

摘　　要：VD(Vacuum degassing)精炼在真空气氛下有强烈的渣-钢反应,具有脱气、脱硫以及控制非金属夹杂物等功能,是生产高品质洁净钢的重要精炼方式。介绍了VD精炼技术的发展历程和工业应用,详细阐述了在脱气、脱硫、夹杂物控制等方面的研究和生产应用情况,并对VD工艺提出了建议。VD精炼中真空脱气(O、N、H)的研究主要集中在优化工艺参数和提升设备性能方面,能将钢中氢质量分数控制在(1~2)×10^(-6),氮质量分数控制在(40~60)×10^(-6),且VD真空脱氮具有一定的优势。脱硫方面,VD精炼有良好的热力学和动力学条件,能将钢中硫含量控制在很低水平。夹杂物控制方面,通过优化炉渣成分和工艺参数,VD精炼可以减少夹杂物数量、对夹杂物进行改性。相关的研究结果对VD精炼的研究与生产具有一定的指导意义,为降低钢中杂质元素含量、控制非金属夹杂物、提高钢的洁净度提供了有益的参考。Vacuum degassing(VD)refining,characterized by strong reactions between slag and steel within a vacuum atmosphere,serves functions such as degassing,desulfurization,and the control of non-metallic inclusions.This method is of great importance for producing high-quality clean steel.This work presented an overview of the development history and industrial applications of VD refining technology,described in detail the research and production of VD refining in degassing,desulfurization and inclusion control,and gave some suggestions for this process at the end.In VD refining,researches on vacuum degassing(including O,N,H)mainly focused on optimizing process parameters and enhancing equipment performance.It could control[H]in steel within(1-2)×10^(-6) and[N]within(40-60)×10^(-6),and denitrogen in VD had some advantages.Regarding desulfurization,VD refining benefitted from favorable thermodynamic and kinetic conditions,enabling control of[S]in steel at relatively low levels.In terms of inclusion control,VD process could decrease the quantity of inclusions effectively and modify inclusions through optimizing slag compositions and process parameters.The related research results had certain guiding significance for the research and industrial production of VD refining,offering favorable references for reducing impurity element content,controlling non-metallic inclusions,as well as improving steel cleanliness.

关 键 词：VD精炼 真空脱气 脱硫 夹杂物控制 精炼渣 

分 类 号：TF769.4[冶金工程—钢铁冶金]