KMnO_4助燃高炉喷吹煤粉的机制  

Combustion Mechanism of Blast Furnace Coal Injection Adding KMnO_4

作　　者：冯帅 吕庆[2] 孙艳芹[2] 吴玮楠[2] 王瑞哲[2] 毕耜友 

机构地区：[1]河北钢铁集团邯郸钢铁公司,河北邯郸056000 [2]河北联合大学冶金与能源学院,河北唐山063009

出　　处：《钢铁研究学报》2013年第9期11-15,共5页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(50774028)

摘　　要：KMnO4是一种适合高炉生产的煤粉助燃剂,通过热重-差热分析其助燃机制是Mn7+(CO-)7削弱了碳结构单元间的桥键结合力以及改变了晶格结构,使煤粉活化能降低,加速燃烧。通过模拟高炉风口的燃烧条件并收集未燃煤粉,采用XRD和SEM方法检测,可知随着助燃剂KMnO4的加入,未燃煤粉的微晶参数增大,芳香片层的堆砌高度升高0.001 3nm,层片直径增大0.036 6nm;KMnO4使未燃煤粉颗粒的平均粒径减小2.62μm。KMnO4 is a kind of pulverized coal combustion improver which is suited for the blast furnace. Mn7＋ （CO-）7 weakened bridge adhesion of carbon structural units and changed lattice structures, activation energy of pulverized coal was lowered and burn rate was accelerated. The unburned coal, which was investigated by the method of XRD and SEM, was collected through simulating combustion conditions of blast furnace. The results show that： micro- crystalline parameters of unburned coal is increased, height and diameter of aromatic slices will increase 0. 0013 and 0. 0366nm respectively as KMnO4 joined; particles size of unburned coal powder can be reduced 2.62tLm by adding KMnO4.

关 键 词：助燃剂KMnO4 未燃煤粉 微晶参数 平均粒径 COMBUSTION IMPROVER adding KMNO4 

分 类 号：TF53[冶金工程—钢铁冶金]