【作者】 张文成； 张小勇； 郑明东；

【Author】 Zhang Wencheng;Zhang Xiaoyong;Zheng Mingdong;Institute of Metallurgy, Anhui University of Technology;Meishan Technology Center, Baosteel Research Institute;Institute of Chemical Industry, Anhui University of Technology;

【机构】 安徽工业大学冶金学院； 宝钢研究院梅钢技术中心； 安徽工业大学化学与化工学院；

【摘要】 通过对高炉风口焦炭的质量分析,探讨了风口不同深度的风口焦炭的粒度、化学成分及焦炭热性能的变化趋势。研究结果表明,焦炭粒度随着风口深度而变化,小于3mm的焦炭呈现先增后减再增加的分布,在0.5～1m的位置有一个小峰值。从渣铁比例来看,则随着风口距离增加呈现先减后增的趋势。从工业分析来看,各粒度等级及各深度范围的风口焦的灰分均有所增加,风口焦全部挥发分都有所降低。从风口焦炭灰成分分析来看,钾、钠和锌元素在0.5m的范围内大块风口焦和小块风口焦均高于入炉焦,在风口位置产生富集;风口焦炭中的硅和铝含量远低于入炉焦,硅在炉内被还原;风口焦炭中的钙和镁含量远高于入炉焦,受到高炉内灰渣影响明显。从焦炭催化指数看,风口焦炭催化指数MCI远大于入炉焦,在高炉内在焦炭外部粘连的渣铁其催化性远大于焦炭本身所带灰分的催化,风口焦较入炉焦的反应性大幅度提高,反应后强度大幅度下降。更多还原

【Abstract】 By analyzing the quality of coke in blast furnace tuyere, the change trend of particle size, chemical composition and thermal properties of coke in tuyere of different depth was discussed. The results show that the coke particle size varies with the tuyere depth, and the coke size less than 3 mm shows a distribution of first increasing, then decreasing and then increasing, with a small peak value at the position of 0.5～1 m. According to the proportion of slag and iron, it decreases first and then increases with the increase of tuyere distance. From the perspective of industrial analysis, the ash content of tuyere coke in each particle size and depth range increased, and all volatiles of tuyere coke decreased. From the composition analysis of tuyere coke ash, potassium, sodium and zinc elements in the 0.5 m range of large tuyere coke and small tuyere coke are higher than the furnace coke, and the concentration occurs in the tuyere location. The content of silicon and aluminum in tuyere coke is much lower than that in coke. The content of calcium and magnesium in tuyere coke is much higher than that in coke. From the perspective of coke catalytic index, tuyere coke catalytic index MCI is much higher than that of coke, and the catalytic property of slag iron sticking to coke outside the blast furnace is much higher than that of coke with ash. The reactivity of tuyere coke is much higher than that of coke, and the intensity of the reaction is greatly reduced after the reaction.更多还原