提质煤代替高炉部分喷吹用煤及其性能  

Upgraded coal injection on blast furnace and its performance

作　　者：郑常乐[1] 张建良[1] 章鹏程[1] 王海洋[1] 郭建[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《钢铁》2015年第10期8-13,共6页Iron and Steel

基　　金：国家重点基础研究发展(973)计划资助项目(2012CB720401)

摘　　要：为了拓展高炉喷吹燃料资源,研究了由长焰煤低温热解提质后得到的提质煤作为高炉喷吹煤利用的可行性。试验采用TG/DTG差热分析对提质煤的燃烧性和反应性进行研究,运用SEM电镜对提质煤与F煤的微观结构进行表征。结果表明,提质煤的燃烧性和反应性均明显优于F煤,这主要是由于提质煤在低温热解过程中挥发分析出,煤粉颗粒结构遭到破坏,产生大量孔隙和棱角结构所致。配加提质煤的混煤燃烧结果表明,提质煤与F煤燃烧具有协同反应作用,混煤的燃烧性和反应性都明显提高,有利于高炉喷吹煤粉在高炉中燃烧利用。高炉喷吹提质煤工业试验结果表明,配加提质煤焦比、燃料比下降,当提质煤配比达40%时,燃料成本下降9.84元/t,经济效益可观。The upgraded coal produced by long- flame coal pyrolysis was studied for blast furnace injection. Upgraded coal combustibility and reactivity were studied by thermal gravimetric analysis in laboratory. Combined with scanning electron microscope analysis,the microscopic structure of upgraded coal and F coal was investigated. And finally the performance of upgraded coal for blast furnace injection was investigated by industry experiment. The results showed that combustion and reactivity of upgraded coal were significantly better than that of F coal,which is mainly due to the break of upgraded coal particle structure at low temperature pyrolysis process,resulting in a large number of pores and angular structure. In addition,combustion of upgraded coal and F coal existed synergistic response effect,blended coals combustibility and reactivity were significantly improved,which is in favor of pulverized coal injection coefficient of utilization in blast furnace. Industry experiment results showed that the economic benefits was considerable with coke ratio and fuel ratio decreased.

关 键 词：高炉 喷吹煤粉 提质煤 燃烧性 反应性 

分 类 号：TF538.63[冶金工程—钢铁冶金]