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.
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)
出处
《炼铁》
CAS
北大核心
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)。
关键词
高炉
富氢
热储备区
矿石还原性
焦炭反应性
blast furnace
hydrogen-enrichment
thermal reserve zone
ore reducibility
coke reactivity
