高炉喷吹煤粉燃烧性与反应性的研究与应用  

Research and application of combustibility and reactivity of pulverized coal injected in blast furnace

作　　者：李杰[1] 宋灿阳[1] 李小静[1] 杜先奎[1] 秦学武[1] LI Jie;SONG Can-yang;LI Xiao-jing;DU Xian-kui;QIN Xue-wu(Technology Center,Ma'anshan Iron and Steel Co.,Ltd.,Ma'anshan 243000,Anhui,China)

机构地区：[1]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000

出　　处：《中国冶金》2019年第1期8-13,共6页China Metallurgy

摘　　要：为了研究高炉喷吹煤粉的冶金性能,采用热重分析法对6种无烟煤和1种烟煤进行燃烧性与反应性研究。结果表明,与无烟煤相比,烟煤在不同温度下的燃烧性和反应性均明显高于无烟煤。混煤的燃烧率实测值大于加权值,使用混煤可以发挥无烟煤和烟煤各自的优点,加快燃烧过程,提高混煤燃烧率。随着混煤中粒度小于74μm煤粉所占比例的增加,燃烧率增大。在高煤比喷吹条件下,混煤煤粉粒度小于74μm的比例控制在75%左右。结合无烟煤的燃烧性和反应性试验结果,建议喷吹煤粉采购中应尽可能多地采购无烟煤C资源,同时控制无烟煤E的采购量;高炉提煤比操作中应将无烟煤C确定为喷吹用无烟煤的首选煤种,以提升混煤燃烧率和发挥未燃煤粉保护焦炭的作用。In order to study metallurgical properties of PCI,the combustibility and reactivity of six kinds of anthracite and one kind of bituminous coal were investigated by thermogravimetric analysis.The results showed that compared with anthracite,the combustibility and reactivity of bituminous coal are obviously higher than that of anthracite at different temperatures.The measurement value of the combustion rate of blended coal was greater than the weighted value.Using the mixed coal can give play to the advantages of anthracite and bituminous coal,accelerate the combustion process and improve the combustion rate of mixed coal.With the increase in the proportion of the coal with the particle size less than 74μm in the mixed coal,the combustion rate increases.Under the condition of high coal ratio,the proportion of the coal with the particle size less than 74μm in the mixed pulverized coals was controlled at about 75%.Combined with the combustion and reactivity experimental results of anthracite coal,it was suggested that the anthracite C should be purchased as much as possible in the procurement of pulverized coal,and the purchase quantity of the anthracite E should be controlled at the same time.The anthracite C should be selected as the preferred coal for anthracite injection in the operation of increasing the coal ratio in blast furnace,so as to enhance the combustion rate of mixed coal and play the role of unburned pulverized coal to protect coke.

关 键 词：高炉喷煤 无烟煤 烟煤 燃烧性 反应性 

分 类 号：TF538.63[冶金工程—钢铁冶金]