铁矿烧结过程低含量CO气相氧化行为研究  

Research on gas phase oxidation behavior of low-content CO in iron ore sintering process

作　　者：代梦博 刘柯佳 龙防 周东锋[3] 公毅 春铁军 DAI Mengbo;LIU Kejia;LONG Fang;ZHOU Dongfeng;GONG Yi;CHUN Tiejun(Henan Iron and Steel Group Co.,Ltd.,Henan Advanced Iron and Steel Material Industry Research Institute,Zhengzhou 450046,Henan,China;Henan Iron and Steel Group Co.,Ltd.,Henan Jinye New Material Science and Technology Co.,Ltd.,Zhengzhou 450046,Henan,China;Anyang Iron and Steel Group Co.,Ltd.,Anyang 455000,Henan,China;School of Metallurgical Engineering,Anhui University of Technology,Ma’anshan 243002,Anhui,China)

机构地区：[1]河南钢铁集团有限公司、河南省先进钢铁材料产业研究院,河南郑州450046 [2]河南钢铁集团有限公司、河南省金冶新材料科技有限公司,河南郑州450046 [3]安阳钢铁股份有限公司,河南安阳455000 [4]安徽工业大学冶金工程学院,安徽马鞍山243002

出　　处：《烧结球团》2024年第6期87-95,共9页Sintering and Pelletizing

基　　金：安徽省自然科学基金面上项目(2008085ME175);安徽省高校自然科学研究项目(YJS20210328)。

摘　　要：铁矿烧结烟气中CO排放尚未得到有效控制。本文针对烧结料层内低含量CO的氧化问题,通过石英管反应器模拟烧结料层内的气相条件,分别在程序升温和恒温条件下考察干基和湿基环境CO的氧化行为。结果表明:引入蒸汽显著促进了CO氧化,并引发爆燃效应;在含有8.0%水蒸气的条件下,CO氧化反应速率及程度均显著提高,起始温度由干基的826℃显著降低至676℃,且在700℃以上时,CO氧化接近完全;料面喷吹蒸汽或烟气循环技术为CO爆燃营造了高温、含水、含氧的条件;推荐的料面气流介质水蒸气体积分数为6.1%~8.0%,以避免料层过湿或CO爆燃条件不足。本文研究结论为烧结过程中CO减排提供理论依据,对生产实践具有指导意义。CO emissions from iron ore sintering gas have not been effectively controlled.Aiming at the oxidation problem of low-content CO in the sintering material layer,a quartz tube reactor is used to simulate the gas phase conditions in the sintering material layer,and the CO oxidation behavior in dry and wet bases is investigated under programmed temperature and constant temperature conditions.The results show that the introduction of steam significantly promotes CO oxidation and triggers the deflagration effect;under the condition of 8.0%water vapor,the CO oxidation reaction rate and degree are significantly improved,and the starting temperature is significantly reduced from 826℃on a dry basis to 676℃,and CO oxidation is almost complete above 700℃;the steam injection or gas circulation technology on the material surface creates high temperature,water bearing and oxygen bearing conditions for CO deflagration;the recommended water vapor volume fraction of the material surface air flow medium is 6.1%~8.0%to avoid over-humidification of the material layer or insufficient conditions for CO deflagration.The research conclusions provide a theoretical basis for CO emission reduction during the sintering process and have guiding significance for production practice.

关 键 词：铁矿烧结过程 气相 湿基 CO氧化 蒸汽喷吹 

分 类 号：TF046.4[冶金工程—冶金物理化学] X701.7[环境科学与工程—环境工程]