高炉富氢热储备区矿焦匹配关系模拟研究  

Study on the Matching Relationship between Ore and Coke in Thermal Reserve Zone under Hydrogen-rich Condition

作　　者：谢师威 王德全 余雪峰 刘燕军 邓勇 薛庆国 XIE Shiwei;WANG Dequan;SHE Xuefeng;LIU Yanjun;DENG Yong;QUE Qingguo(State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China;Delong Iron and Steel Co.,Ltd.,Xingtai 054009,Hebei,China;Hebei Hot Rolled Strip Technology Innovation Center,Xingtai 054009,Hebei,China;School of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,Hebei,China)

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]德龙钢铁有限公司,河北邢台054009 [3]河北省热轧板带钢技术创新中心,河北邢台054009 [4]华北理工大学冶金与能源学院,河北唐山063210

出　　处：《炼铁》2024年第3期60-65,共6页Ironmaking

基　　金：国家自然科学基金资助项目(U1960205)。

摘　　要：通过建立高炉热储备区CO、H_(2)混合气体还原FeO矿球未反应核模型,探究煤气利用率与温度的关系,进而得到不同H_(2)含量时,矿球还原性与焦炭反应性的匹配关系。结果表明:①还原性气体全为CO时,对于单一种矿球来说,随着热储备区温度的降低,煤气利用率受动力学和热力学共同作用,呈现升高后降低的趋势,有一个煤气利用率最大值;②富氢时,对同一种矿球来说,随着H_(2)含量的增加,在温度为950~1000℃时,煤气利用率整体升高,煤气利用率最大值对应的温度也升高;③矿球还原性越高,匹配的焦炭反应性越高,H_(2)含量增加1%,焦炭反应性指数需降低0.42%。The relationship between gas utilization rate and temperature is studied by building an unreacted nucleus model of FeO pellet reduced by CO and H_(2) mixture in the thermal reserve area so as to derive the matching relationship between the pellet reducibility and the coke reactivity under the condition of different H,contents.The study results indicates:(1)for single type of ore pellet,if the reducing gas is CO only,the gas utilization rate increases first and then decreases as the tem-perature in the heat reserve area decreases under the combined action of kinetics and thermodynamics,and there is a highest value of gas utilization rate;(2)for the same type of pellets,if hydrogen is enriched,the overall utilization rate of gas at the temperature within 950-1000℃ increases along with the increase of H_(2) content,and the temperature corresponding to the highest value of the gas utilization rate also increases;(3)the higher the reducibility of the ore pellets,the higher the reac-tivity of the matched coke is,and the reactivity of coke needs to decrease by 0.42% for every 1%increase of H,content.

关 键 词：高炉 富氢 热储备区 矿石还原性 焦炭反应性 

分 类 号：TF54[冶金工程—钢铁冶金]