煤炭转化2025，Vol.48Issue(6)：102-111,10.DOI:10.19726/j.cnki.ebcc.202506009
相近CRI及CSR的同系焦炭不可替换性Qisunny法分析
Non-replaceability analysis of same series coke with similar CRI&CSR by Qisunny method
摘要
Abstract
The Coke Reactivity Index(CRI)and Coke Strength after Reaction(CSR)are among the most important indicators for evaluating coke quality,exerting a significant influence on blast furnace productivity.To ensure continuous and stable production of blast furnace,steel plants usually adopt cokes from the same series with similar CRI and CSR values.However,this practice often causes instabilities in furnace conditions,raising a critical question:can same-series cokes be truly interchangeable?Their replaceability depends on whether they perform similar functions and exhibit comparable smelting effects inside the blast furnace.To address this issue,three same-series cokes with similar CRI and CSR values were selected and coupled with the same ore-blend in a Qisunny ore-coke coupling experiment,simulating blast furnace conditions.This study analyzed the smelting effects of the three cokes from the perspectives of solution loss and degradation behavior,reduction function,and thermal function.The results demonstrate that the same-series cokes exhibit distinct variations in solution loss and degradation behavior,which leads to varying degrees of impact on both indirect and direct reduction processes.Thermodynamic analysis reveals differing trends in the heat flux density,resulting in significant differences in their effects on the heating exchange of blast furnace.Consequently,it is evident that coke belonging to the same series do not necessarily possess similar smelting effect,thus indicating that cokes with similar CRI and CSR values may not be replaced.关键词
高炉/焦炭/CRI&CSR/焦炭冶炼/热力学Key words
blast furnace/coke/CRI&CSR/coke smelting/thermodynamic分类
冶金工业引用本文复制引用
李哲熙,李廷乐,黄浚宸,汪琦,杨松陶,孙长余,朱亚明..相近CRI及CSR的同系焦炭不可替换性Qisunny法分析[J].煤炭转化,2025,48(6):102-111,10.基金项目
国家自然科学基金项目(52204315和52174319). （52204315和52174319）
