第36卷第12期 北京科技大学学报 Vol.36 No.12 2014年12月 Journal of University of Science and Technology Beijing Dec.2014 捣固焦高温气化反应特性 王 喆”，张建良”，左海滨四，高冰”，孔德文》 1)北京科技大学治金与生态工程学院，北京1000832)北京科技大学钢铁治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 ☒通信作者，Emai:zuohaibin@usth.cdu.cm 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℃时己达到最大值。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. 关键词高炉；治金焦：气化反应：高温：气孔结构 分类号TF526.1 Gasification reaction characteristics of stamp charging cokes at high temperature WANG Zhe'”,ZHANG Jian--iang”,ZU0Hai-bina,GA0Bing”,KONG De4-ten》 1)School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China 3)Tangshan Iron Steel Group Co.Ltd.,Tangshan 063016,China Corresponding author,E-mail:zuohaibin@ustb.edu.cn ABSTRACT 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 slow- ly firstly and then quickly,and it is low when below 1000C: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 1100C.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 C and 1100 C. KEY WORDS blast furnaces;metallurgical coke:gasification reactions:high temperature;pore structure 近年来，捣固炼焦技术在我国得到了迅速的发于生产工艺的不同，捣固焦的性能和结构与传统顶 展，2012年捣固炼焦产能约达3亿t.捣固炼焦技术 装焦存在差异，使得捣固焦在高炉中的使用效果并 可以扩展炼焦煤资源，使用更多的弱粘结性煤，从而 不一定比顶装焦好.当前，人们对于捣固焦的认 缓解我国优质炼焦煤资源短缺的问题·).然而，由 识尚不十分清楚，未能提出准确评价捣固焦质量的 收稿日期：201403-11 基金项目：国家重点基础研究发展计划资助项目(2012CB720401) DOI:10.13374/j.issn1001-053x.2014.12.006:http://journals.ustb.edu.cn第 36 卷 第 12 期 2014 年 12 月 北京科技大学学报 Journal of University of Science and Technology Beijing Vol． 36 No． 12 Dec． 2014 捣固焦高温气化反应特性 王 喆1) ，张建良1) ，左海滨2) ，高 冰1) ，孔德文3) 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  通信作者，E-mail: zuohaibin@ ustb． edu． cn 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． 关键词 高炉; 冶金焦; 气化反应; 高温; 气孔结构 分类号 TF526 + . 1 Gasification reaction characteristics of stamp charging cokes at high temperature WANG Zhe1) ，ZHANG Jian-liang1) ，ZUO Hai-bin2)  ，GAO Bing1) ，KONG De-wen3) 1) School of Metallurgical and Ecological Engineering，University of Science and Technology Beijing，Beijing 100083，China 2) State Key Laboratory of Advanced Metallurgy，University of Science and Technology Beijing，Beijing 100083，China 3) Tangshan Iron ＆ Steel Group Co． Ltd． ，Tangshan 063016，China  Corresponding author，E-mail: zuohaibin@ ustb． edu． cn ABSTＲACT 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 slow￾ly 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 ℃ ． KEY WOＲDS blast furnaces; metallurgical coke; gasification reactions; high temperature; pore structure 收稿日期: 2014--03--11 基金项目: 国家重点基础研究发展计划资助项目( 2012CB720401) DOI: 10． 13374 /j． issn1001--053x． 2014． 12． 006; http: / /journals． ustb． edu． cn 近年来，捣固炼焦技术在我国得到了迅速的发 展，2012 年捣固炼焦产能约达 3 亿 t． 捣固炼焦技术 可以扩展炼焦煤资源，使用更多的弱粘结性煤，从而 缓解我国优质炼焦煤资源短缺的问题［1--3］． 然而，由 于生产工艺的不同，捣固焦的性能和结构与传统顶 装焦存在差异，使得捣固焦在高炉中的使用效果并 不一定比顶装焦好［4--6］． 当前，人们对于捣固焦的认 识尚不十分清楚，未能提出准确评价捣固焦质量的