高炉内焦炭气固溶损反应及其内部结构转变研究  

Influence of dissolution loss reaction of coke in blast furnace and development of new indicators

作　　者：郑林[1] 何二喜 潘玉柱 熊梓鑫 李克江[2] 张建良[2] Zheng Lin;He Erxi;Pan Yuzhu;Xiong Zixin;Li Kejiang;Zhang Jianliang(Ironmaking Department,Xiangtan Iron and Steel Co.,Ltd.of Hunan Valin;University of Science and Technology Beijing)

机构地区：[1]湖南华菱湘潭钢铁有限公司炼铁厂 [2]北京科技大学冶金与生态工程学院

出　　处：《冶金能源》2024年第6期44-48,共5页Energy For Metallurgical Industry

基　　金：国家自然科学基金面上项目(51974019,51804025);国家重点研发计划(2017YFB0304300,2017YFB030430)。

摘　　要：焦炭在高炉炼铁全流程中扮演着关键角色,对其质量和功能评估而言,考察其微观结构多尺度变化至关重要。高炉内部环境促使焦炭发生气固溶损反应,导致内部形成不同程度的多孔结构,这种变化对焦炭的反应性能和机械性能具有重大影响。文章对某钢铁厂所用焦炭在溶损过程中的反应动力学进行探究,并针对温度和反应时间对焦炭性能的影响进行了相关实验研究。结果表明,随着反应温度的升高,焦炭的失重率明显增加,1200℃下的失重率是1100℃的1.6倍左右,并且反应后的焦炭内部孔隙直径增大,孔数增加。非等温气化实验结果表明,所用焦炭在900℃左右开始发生溶损反应,且顺城焦炭的反应性最高。Coke plays a crucial role in the entire process of blast furnace ironmaking,and for its quality and functional evaluation,it is crucial to examine the multi-scale changes in its microstructure.The internal environment of the blast furnace promotes the gas-solid solution loss reaction of coke,leading to the formation of varying degrees of porous structures inside.This change has a significant impact on the reactivity and mechanical properties of coke.The article explores the reaction kinetics of coke used in a certain steel plant during the dissolution process,and conducts relevant experimental studies on the effects of temperature and reaction time on coke performance.The results showed that as the reaction temperature increased,the weight loss rate of coke significantly increased.The weight loss rate at 1200℃was about 1.6 times higher than that at 1100℃,and the internal pore diameter and number of pores of the reacted coke increased.The results of non isothermal gasification experiments indicate that the used coke begins to undergo dissolution reaction at around 900℃,and Shuncheng coke has the highest reactivity.

关 键 词：焦炭 溶损反应 反应动力学 工业CT 

分 类 号：TF526.1[冶金工程—钢铁冶金]