2012年9月第43卷第5期
燃料与化工
Fuel&Chem
cal'Pmocesse
高温捣固焦与顶装焦抗碱性差异研究
马超张建良庞清海祁成林
（北京科技大学冶金与生态工程学院，北京100083）
25
摘要：通过研究负碱焦炭在短时内的溶损反应程度，发现换固焦在反应初期速率较低，但在高温呈现较高的反应性；反应后，项装焦内部以中粒和粗粒结构为主，气孔较小，数量多，面搞围焦内部以各向异性和细粒结构
为主，存在大的贯穿气孔，气孔数量少；携围焦内存在贯穿气孔和细小装纹，气孔不均匀度略大于顶装焦。关键调：换固焦顶装焦气孔微观结构
中图分类号：TF053
文献标识码：A
文章编号：10013709（2012）05-0025-03
Alkaliresistance comparisionbetween cokemade with stamp-charging
batteryandtop-chargingbatteryunderhightemperature
Ma Chao Zhang Jianliang Pang QinghaiQi Chenglin
(Metallurgical and Ecological Engineering College of Beijing University of Science and Technology, Beijing 100083, China) Abstract: The solution loss degree of alkali bearing coke in a short time is studied. The following conclusion is drawn. At the initial period the coke made with stampcharging battery has a lower rate of reaction and higher reactivity under high temperature. After reaction, inside the coke made with top-charging battery there are mainly medium and coarse grain structures with small pores but more in eaeee grain structures with bigger through pores and less in quantity; inside the coke made with stamp-charging battery, through pores and fine cracks exist and its unievenness of pores is greater than that of the coke made with topcharging battery.
Key words: Coke made with stampcharging batteryCoke made with topcharging battery
PoreMicrostructure
随着3000m甚至更大容积高炉的增多，对焦炭质量的要求越来越严格。焦炭的性能和质量不仅决定高炉冶炼炉容、喷煤量和炉缸工作状态，而且直接决定高炉燃料比的高低，成为能否实现低碳炼铁的决定性因素。随着优质炼焦煤资源的日趋减少，捣固炼焦工艺逐步被广泛采用。但是近年来高炉内碱金属循环富集，尤其是炉料带人的K,O、 Na,0普遍高于要求的2.5~3.0kg/t，导致焦炭中的钾、钠含量剧增，成为炉内焦炭强度恶化的重要原因之一1-2]。而搞固焦在高炉内的实际效果较差，表现为炉料的软熔区间增大、最大压差升高，捣固
焦劣化程度也稍大于顶装焦。收稿日期：2012-02-03
作者荫介：马超（1986-），男，硕士研究生万方数据
本试验研究分析了项装焦和势固焦在负碱状态下1200℃溶损反应后的微观结构，阐述了固焦在高炉内使用效果不如顶装焦的间题。
1
试验条件
1.1试样的制备
试验选取A、B焦炭为原料，其中A为顶装焦，B为捣固焦。2种焦炭的工业分析和元素分析见表1。
试样的制备分为3个步骤：①破碎筛分。将2 种焦炭分别破碎，利用振动筛筛出粒度为20~ 23mm的焦炭。②烘干。将得到的焦炭放人烘箱