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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 suitable for blast furnace production. Its thermal combustion-differential thermal analysis shows that Mn7 + (CO-) 7 weakens the bridging bond between carbon structural units and changes the lattice structure, Activation of powder can be reduced to accelerate the combustion. By simulating the combustion conditions of blast furnace tuyere and collecting unburned coal powder, the XRD and SEM methods were used to test the results. It is found that with the addition of oxidant KMnO4, the crystallite parameters of unburned coal powder increased and the stacking height of aromatic sheet increased by 0.001 3nm, ply diameter increased 0.036 6nm; KMnO4 to reduce the average particle size of unburned coal particles 2.62μm.