捣固焦高温气化反应特性  

Gasification reaction characteristics of stamp charging cokes at high temperature

作　　者：王喆[1] 张建良[1] 左海滨[2] 高冰[1] 孔德文[3] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [3]唐山钢铁集团有限责任公司,唐山063016

出　　处：《北京科技大学学报》2014年第12期1602-1607,共6页Journal of University of Science and Technology Beijing

基　　金：国家重点基础研究发展计划资助项目(2012CB720401)

摘　　要：通过模拟高炉实际条件,研究了温度、富碱条件等对五种捣固焦气化反应的影响,并结合光学组织和微观气孔结构分析了捣固焦在高温下的碳溶反应规律。实验结果表明,反应温度升高和富碱均能较大地提高捣固焦气化反应失碳率。不富碱时,捣固焦气化反应失碳率随温度升高先缓慢增长而后急剧升高,在1000℃以下时反应较少;富碱后,四种捣固焦失碳率随温度升高先急剧升高而后趋于平稳,在1100℃时已达到最大值。捣固焦内部闭气孔比例较大,大气孔较少,微小气孔较多,局部存在盲肠状气孔,反应后大气孔和贯穿孔数量增加。除反应性最低的捣固焦A外,其他四种捣固焦以基础各向异性和粗粒镶嵌结构为主,在1000℃和1100℃时抗碱金属侵蚀能力较差.The influences of temperature and alkali metals on the gasification reactions of 5 kinds of stamp charging cokes were investigated by simulating the real conditions of blast furnaces. The carbon solution loss reaction regularity of the cokes was also analyzed by testing the optical textures and microscopic pore structures. The results show that the mass loss ratio of the cokes can increase quickly by rising the reaction temperature or enriching alkalis. Without alkalis,the mass loss ratio of the cokes increases slowly firstly and then quickly,and it is low when below 1000 ℃; but with alkalis,the mass loss ratio of 4 kinds of stamp charging cokes increases quickly firstly and gently then,and it reaches the maximum at 1100 ℃. The cokes contain more closed pores,more small pores,less large pores,and a few cecum-like pores locally. The quantity of large pores and connected pores in the cokes increases after the reactions. Except stamp charging coke A,whose coke reactivity index is the lowest,the other 4 kinds of stamp charging cokes are mainly basic anisotropic and coarse mosaic structures,which are less resistant to alkali metals at 1000 ℃ and 1100 ℃.

关 键 词：高炉 冶金焦 气化反应 高温 气孔结构 

分 类 号：TF526.1[冶金工程—钢铁冶金]