煤质技术2024，Vol.39Issue(1)：11-20,10.DOI:10.3969/j.issn.1007-7677.2024.01.002
焦炭反应性对块矿高炉冶金性能的影响研究
Influences of cokes'reactivity on the metallurgical properties of lump ores in the blast furnace
摘要
Abstract
The influence of cokes'reactivity on metallurgical properties(e.g.,droplet properties and dripping mate-rial quality of lump ores)was studied to discuss the actual deterioration of cokes with different reactivity in the blast furnace.It provided technical support for improving the comprehensive evaluation index system of cokes.The experimen-tal testing device was applied for the dripping performance of iron-ore load reduction.When the CO2/N2 volume fraction ratio was 30%∶ 70%,the influences of five different thermal reactivity cokes and mixed cokes on blast furnace opera-tion and dripping material quality were investigated.The results show that:when cokes'reactivity rose from 22.0%to 50.2%,the softening temperature gradually decreased and the soft melt zone thickened.When the reactivity of coke was less than 35%,as the reactivity increased,the pressure difference sharply increased and the temperature decreased,breathability was reduced,at the same time,difficult-to-reduce Fe2 SiO4 and incompletely reduced FeO gradually ap-peared in droppings,and coke powders in droppings gradually increased.When the reactivity of coke exceeded 35%,the pressure difference and temperature rose with permeability improved.Breathability was improved,difficult-to-reduce Fe2SiO4 and incompletely reduced FeO gradually decreased,and coke powders in droppings also gradually decreased.Cokes mixed in a certain proportion were superior to those with a single thermal property in reducing the thickness of the soft melt zone,improving air permeability,and reducing the concentration of coke powders in drippings.关键词
焦炭反应性/冶金性能/块矿/透气性/软熔带/熔滴性能/滴落物质量/焦粉含量Key words
cokes reactivity/metallurgical properties/lump ores/breathability/soft melt zone/droplet proper-ties/dripping material quality/concentration of coke powders分类
矿山工程引用本文复制引用
马星野,王刚,李超,刘洋,隋月斯,钟祥云,徐国忠,白金锋..焦炭反应性对块矿高炉冶金性能的影响研究[J].煤质技术,2024,39(1):11-20,10.基金项目
国家自然科学基金资助项目(22378181) （22378181）
中国五矿科技专项-绿色低碳氢冶金技术及关键装备研发基金资助项目(2020ZXA01) （2020ZXA01）
兴辽英才计划科技创新领军人才基金资助项目(XLYC2002063) （XLYC2002063）
