Softening and melting behaviors of ferrous burden in hydrogen-rich blast furnace cohesive zone

作     者：Bin-bin Lyu Guang Wang Fan Yang Hai-bin Zuo Qing-guo Xue Jing-song Wang Bin-bin Lyu;Guang Wang;Fan Yang;Hai-bin Zuo;Qing-guo Xue;Jing-song Wang

作者机构：State Key Laboratory of Advanced MetallurgyUniversity of Science and Technology BeijingBeijing100083China 

出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)

年 卷 期：2023年第30卷第12期

页      面：2366-2377页

核心收录：

学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程] 

基　　金：support of the National Natural Science Foundation of China(Nos.U1960205 and 51804024) China Baowu Low Carbon Metallurgy Innovation Foundation(BWLCF202101 and BWLCF202104) China Minmetals Science and Technology Special Plan Foundation(2020ZXA01) 

主　　题：Ferrous burden-Hydrogen Softening Melting Cohesive zone Slag-iron-coke interface 

摘      要：The changes in the softening and melting behaviors of ferrous burden in the cohesive zone and the characteristics of the slag–iron–coke interface in a blast furnace were investigated by simulating an actual blast furnace under hydrogen-rich *** to the variation in the transient shrinkage of the burden under different atmospheres,the shrinkage start temperature of the sinter was higher than that of the *** negative shrinkage rate of the pellets was greater than that of the ***,the softening start temperature in the blast furnace decreased under hydrogen-rich conditions,giving the blast furnace a broader range of softening *** softening start temperatures of the pellets and sinter decreased from 1102 to 949℃ and 1152 to 1080℃,*** hydrogen-rich traditional blast furnace conditions narrowed the melting zone temperature range and shifted it toward the high-temperature zone,significantly improving the burden layer ***,under the hydrogen-rich oxygen blast furnace conditions,there were a decrease in the melting start temperature,a shift of the melting zone location to the low-temperature zone,and an increase in the burden layer permeability and pressure difference.A comparison of the slag–iron–coke interface characteristics under different atmospheric conditions showed that the carbon content in metallic iron decreased under hydrogen-rich traditional blast furnace conditions compared with traditional blast furnace ***,under hydrogen-rich oxygen blast furnace conditions,the carbon content in metallic iron increased compared with oxygen blast furnace *** findings provide guidance for the development of low-carbon ironmaking processes in blast furnaces.