高炉炉料结构对软熔过程煤气成分的影响  

Influence of blast furnace burden structure on gas composition during softening-melting process

作　　者：韩凤光 张建良[3] 刘征建[3] HAN Fengguang;ZHANG Jianliang;LIU Zhengjian(School of Mineral Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China;Technology Center of Meishan Iron and Steel Compangy,Baosteel Central Research Institute,Nanjing 210039,Jiangsu,China;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083 [2]宝钢股份中央研究院梅钢技术中心,江苏南京210039 [3]北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁研究学报》2023年第10期1207-1213,共7页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(52174291)。

摘　　要：为研究高炉炉料结构变化对炉内煤气成分的影响,以梅钢高碱度烧结矿搭配块矿为主的炉料结构为基础,通过调整烧结矿碱度、烧结矿比例和块矿比例,研究与分析了不同炉料结构下高炉煤气的成分变化、还原-软熔性能以及煤气利用率结果。研究表明,高炉煤气中CO和CO_(2)的峰值分别出现在下部直接还原区和块矿带间接还原区。在块状带区域,随着烧结矿碱度提高、比例降低和块矿比例的提高,煤气利用率呈现下降的趋势。而在软熔开始之后,高碱度烧结矿搭配高比例块矿的实验组煤气利用率出现显著上升。高比例烧结矿(碱度1.8)对于煤气利用率提升最为有效,但高碱度烧结矿(碱度2.2~2.3)也能够通过交互作用在一定程度上弥补提高块矿比例后煤气利用率的降低。To investigate the impact of blast furnace burden structure on gas composition in the blast furnace,the change in blast furnace gas composition,reducibility,softening-melting performance,and gas utilization rate were studied and analyzed by adjusting the alkalinity of sintered ore,the proportion of sintered ore,and the proportion of lump ore based on the burden structure of high-basicity sinter with lump ore in Meishan Steel.The study found that the peak values of CO and CO_(2)in blast furnace gas occur in lower part of the direct reduction zone and indirect reduction zone of lumpy zone,respectively.The gas utilization rate in the lumpy zone tended to decrease with increasing of sinter basicity,decreasing of sinter proportion,and increasing of lump ore proportion.After the start of soft melting,the experimental group of high alkalinity sintered ore combined with high proportion block ore showed a significant increase in gas utilization rate.The high proportion sinter burden with basicity of 1.8 is the most effective for improving the gas utilization rate.However,the high alkalinity sintered ore(alkalinity of 2.2-2.3)can also compensate to some extent for the decrease in gas utilization rate after increasing the proportion of block ore.

关 键 词：炉料结构 高碱度烧结矿 块矿比例 煤气成分 煤气利用率 交互行为 

分 类 号：TF537[冶金工程—钢铁冶金]