摘要
利用热重分析仪对提质煤与高炉喷吹用烟煤单独燃烧过程、不同比例混合燃烧过程进行了研究。考察了提质煤添加量与混煤燃烧的特征参数、相互影响程度之间的相关性,并用DAEM动力学模型计算了不同提质煤配加量时混煤的活化能。结果表明:提质煤单独燃烧速率要快于高炉喷吹用烟煤单独燃烧速率;随着提质煤配比的增加,混煤着火温度降低,可燃指数和综合燃烧特性指数增大,燃烧性能变好;提质煤与烟煤混燃相互作用因子K值均大于1,两者在燃烧过程中具有相互促进作用;随着提质煤配比量的增加,混煤的活化能逐渐降低,混煤燃烧活性逐渐变强。
Thermo-gravimetric analysis is performed to study the combustion performance of upgraded low rank coal, bituminous coal injected into blast furnace and their mixture.It＇s studied the relationship between adding quantity of upgraded low rank coal and change rules of blended coal combustion index and their influence on each other.Blended combustion kinetics is analyzed by using the distributed activation energy model （DAEM）.The results indicate that the combustion rate of upgraded low rank coal is faster than that of bituminous coal.With the increase of adding quantity of upgraded low rank coal in the blended coal,the ignition temperature gradually decreases, the combustible index and comprehensive combustion index increase, and burning effect gets better.The value of interaction factors K of all blended coals are greater than 1,which suggests that the mutual promotion between upgraded low rank coal and bituminous coal in the combustion process existslThe apparent activation energy of blended coals decrease with the increase of adding quantity of upgraded low rank coal, which indicates the combustion activity of blend coal gradually stronger.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第2期1-10,共10页
Journal of Chongqing University
基金
国家科技支撑计划资助项目(2011BAC01B02)
国家重点基础研究发展计划资助项目(973计划)(2012CB720401)~~
关键词
提质煤
烟煤
热重
燃烧特性
相互作用因子
DAEM动力学模型
upgraded low rank coal
bituminous coal
combustion characteristics
interaction factors
DAEM kinetic analysis model
作者简介
徐润生（1988-），北京科技大学博士研究生，主要从事炼铁燃料高效利用及非高炉炼铁相关研究；
张建良（联系人），北京科技大学教授，博士生导师，主要从事炼铁新技术相关研究，（E-mail）j1．zhang@ustb．edu．cn。
