氢冶金竖炉还原域的数值模拟分析  

Numerical simulation analysis of reduction domain in hydrogen metallurgy shaft furnace

作　　者：柴锡翠 岳强 张钰洁 王琦 CHAI Xi-cui;YUE Qiang;ZHANG Yu-jie;WANG Qi(School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China;State Environmental Protection Key Laboratory of Eco-Industry,Shenyang 110819,Liaoning,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]国家环境保护生态工业重点实验室,辽宁沈阳110819

出　　处：《钢铁》2022年第4期138-147,共10页Iron and Steel

基　　金：国家重点研发计划资助项目(2019YFC1905204);国家自然科学基金资助项目(52170177);中央高校基本科研业务费资助项目(N182502045)。

摘　　要：钢铁工业是中国国民经济发展的重要基础产业,在中国“碳达峰、碳中和”的背景下,低碳生产已成为钢铁行业新的竞争力。环境意识的日益提高迫切需要开发创新技术,氢冶金在炼铁环节利用清洁和可再生能源,是全世界公认的最清洁环保的冶金技术。H_(2)的利用可以减少炼铁过程产生的温室气体,从源头上减少碳还原剂带入的排放。氢冶金竖炉的数值模拟是研究钢铁冶金流程内部特性的一种重要方法,其目的是设定合理的氢直接还原反应器的炉型参数及还原条件,可为实现平稳运行提供有效策略。依据逆流还原竖炉规律和安全可靠、稳定顺行、高效节能的方针,充分发挥H_(2)还原优势,利用现有竖炉设计和生产经验,借助Ansys软件对氢冶金竖炉还原域进行数值模拟分析,重点研究纯氢在高温还原条件下的工艺优势。结果表明,还原反应沿着氢还原竖炉进行时,呈现出气态反应物含量降低而气态产物含量增加的变化趋势;同时,还原反应主要集中在还原域的中下部,即0.5~2.0 m的高度范围。合理设置还原条件及还原域参数可显著提高整个工艺流程的还原度,减缓原料的消耗,达到最优效率,为远期结合可再生能源廉价化趋势过渡到全氢竖炉提供合理化建议,支持氢冶金尽早实现工业化应用,为氢冶金工业设计提供理论支撑。Iron and steel industry is important basic industry for China′s national economic development.Under the background of"carbon peak and carbon neutralization",low-carbon production has become a new competitiveness of iron and steel industry.The increasing environmental awareness calls for the development of innovative technologies.Hydrogen metallurgy is recognized as the cleanest and the most environment friendly metallurgical technology in the world,and clean and renewable energy are used in the iron-making process.The use of H_(2)can reduce the greenhouse gas emissions caused by the iron-making process and reduce the emissions brought by carbon reductants from the source.Numerical simulation of hydrogen metallurgy shaft furnace is an important method to study the internal characteristics of iron and steel metallurgical process,which can provide an effective strategy for smooth operation.The purpose is to set reasonable furnace type parameters and reduction conditions of hydrogen direct reduction reactor.According to the rule of countercurrent reduction shaft furnace and the principle of safe,reliable,stable running,high efficiency and energy saving,this paper gave full play to the advantages of H_(2)reduction,using existing shaft furnace design and production experience,carried out numerical simulation analysis on the reduction domain of hydrogen metallurgy shaft furnace with the help of Ansys,and which focused on the technological advantages of pure hydrogen in high temperature reduction conditions.The results show that the contants of gaseous reactants decreases while the contants of gaseous products increases when the reduction reaction goes along the hydrogen reduction shaft furnace.At the same time,the reduction reaction is mainly concentrated in the middle and lower part of the reduction domain,that is,0.5-2.0 m height.Reasonable setting of reduction conditions and parameters of reduction domain can significantly improve the reduction degree of the whole process,slow down the consumption of raw materials,

关 键 词：氢气 氢冶金 竖炉 还原域 数值模拟 

分 类 号：TF19[冶金工程—冶金物理化学]