焦炭在碱金属负荷条件下对炉料熔滴性能的影响  

Effect of Coke Under Alkali Metal Load on the Droplet Performance of Furnace Charge

作　　者：陈树军 刘凯 吕庆 王福佳 

机构地区：[1]东北大学冶金学院,辽宁沈阳110819 [2]河钢集团承钢分公司,河北承德067000 [3]华北理工大学教育部现代冶金技术重点实验室,河北唐山063009

出　　处：《东北大学学报（自然科学版）》2017年第11期1564-1568,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(U1360205)

摘　　要：通过模拟炼铁高炉内炉料的熔滴过程,研究了焦炭在不同碱金属负荷下对熔滴过程的影响.对不同碱金属负荷与炉料的最大压差Δpmax和熔滴总特性值S的关系进行了分析.研究发现焦炭影响炉料熔滴性能主要是由于碱金属对其熔损反应的催化作用造成的.由扫描电镜观察到熔滴反应后的焦炭形貌可知,随着碱金属负荷的增加,其表面的气孔增多,气孔变大,焦炭表面被侵蚀得越来越严重,最终焦炭强度下降,甚至崩裂,最终影响到炉料的熔滴性能,使Δpmax,S值指标变差.By simulating droplet formation and property in blast furnace, the effect of coke under different alkali metal loads on the droplet performance of furnace charge was investigated. The relations between alkali metal load and the maximum pressure difference （Afmax） and the droplet eigenvalue （S ） value were analyzed, respectively. The results indicate that the coke under alkali metal load affects the charge melt drops performance through catalyzing melting reaction of coke. The morphology of cokes after reaction shows that with the increase of alkali metal load, the number of stomatal on the coke surface increases and the size becomes larger, the erosion of coke surface becomes more severe, the strength of the coke decreases even down to zero, eventually the droplet performance of furnace charge can be affected,which make A^maX and S deteriorate greatly.

关 键 词：碱金属 熔滴性能 焦炭熔损反应 催化作用 

分 类 号：TQ054[化学工程]