工程科学学报，第38卷，第7期：930-936,2016年7月 Chinese Journal of Engineering,Vol.38,No.7:930-936,July 2016 DOI:10.13374/j.issn2095-9389.2016.07.006:http://journals.ustb.edu.cn 孔隙结构特征对焦炭高温抗拉强度的影响 郭文涛”，薛庆国”，凌超”，左海滨”，王静松)四，韩毅华) 1)北京科技大学钢铁治金新技术国家重点实验室，北京1000832)华北理工大学治金与能源学院，唐山063009 ☒通信作者，E-mail:wangjingsong(@usth.cd山.cm 摘要采用压汞仪测量焦炭与C0,或H,0反应后的孔隙结构特征，研究孔隙率、平均孔径、比表面积及孔径分布对焦炭高 温抗拉强度的影响规律.焦炭孔隙率和平均孔径随反应率升高而增加.平均孔径小于30m时气化反应以造孔为主，比表面 积随反应率升高先增后减，大于30μm时以扩孔为主，随反应率升高而减小.与C0,相比，H,0反应后焦炭平均孔径小，比表 面积大，抗拉强度高.焦炭抗拉强度随孔隙率和平均孔径增加而降低，平均孔径小于30μm时抗拉强度随比表面积增加而降 低，大于30μm时随比表面积减小而降低.焦炭中小孔数量越多抗拉强度越高，大孔数量越多抗拉强度越低。相同反应率下， H,0反应后焦炭中小孔数量增加，比表面积大，有利于保护气孔壁结构，抑制高温抗拉强度的降低 关键词焦炭：气化反应：孔隙结构：高温：抗拉强度 分类号TF526.1 Influence of pore structure features on the high temperature tensile strength of coke GUO Wen-tao,XUE Qing-guo,LING Chao,ZUO Hai-bin,WANG Jing-song,HAN Yi-hud 1)State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China 2)College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063009,China Corresponding author,E-mail:wangjingsong@ustb.edu.cn ABSTRACT Through measuring the pore structure features of coke reacted with H,O or CO,using a mercury porosimeter,the influ- ence of average pore size,specific surface area and pore size distribution on the high temperature tensile strength of coke were studied in this paper.It is found that the porosity and average pore diameter of coke increase with the increase of reaction degree.When the average pore size is less than 30um,the gasification reaction is mainly pore-ereating,and the surface area of coke increases firstly and then decreases with increasing reaction degree:but when the average pore size is more than 30 um,the gasification reaction is mainly pore-expanding.Compared with CO,coke reacted with H2O has a smaller average pore diameter,larger specific surface area and ten- sile strength.The tensile strength of coke decreases with the increase of porosity and average pore diameter.At an average pore diame- ter smaller than 30 um,the tensile strength decreases with the increase of specific surface area:but at an average pore diameter larger than 30 um,the tensile strength decreases with the decrease of specific surface area.The small pore increases the tensile strength of coke,while the large pore decreases the tensile strength.At the same reaction rate,coke reacted with HO has a large amount of small pores and large specific surface area,which are conducive to protect the structure of the air pore wall and to prevent from the reduction of tensile strength at high temperature. KEY WORDS coke:gasification reactions;pore structure:high temperature;tensile strength 焦炭是高炉炼铁过程不可或缺的原料，起提供热量、还原剂、铁水渗碳和料柱骨架的作用-.随高炉 收稿日期：2015-09-18 基金项目：国家自然科学基金资助项目(51574023)：国家重点基础研究发展计划资助项目(2012CB720401):河北省自然科学基金一钢铁联合 研究基金资助项目(F2014209144)工程科学学报，第 38 卷，第 7 期: 930--936，2016 年 7 月 Chinese Journal of Engineering，Vol． 38，No． 7: 930--936，July 2016 DOI: 10． 13374 /j． issn2095--9389． 2016． 07． 006; http: / /journals． ustb． edu． cn 孔隙结构特征对焦炭高温抗拉强度的影响 郭文涛1) ，薛庆国1) ，凌 超1) ，左海滨1) ，王静松1) ，韩毅华2) 1) 北京科技大学钢铁冶金新技术国家重点实验室，北京 100083 2) 华北理工大学冶金与能源学院，唐山 063009  通信作者，E-mail: wangjingsong@ ustb． edu． cn 摘 要 采用压汞仪测量焦炭与 CO2 或 H2O 反应后的孔隙结构特征，研究孔隙率、平均孔径、比表面积及孔径分布对焦炭高 温抗拉强度的影响规律． 焦炭孔隙率和平均孔径随反应率升高而增加． 平均孔径小于 30 μm 时气化反应以造孔为主，比表面 积随反应率升高先增后减，大于 30 μm 时以扩孔为主，随反应率升高而减小． 与 CO2 相比，H2O 反应后焦炭平均孔径小，比表 面积大，抗拉强度高． 焦炭抗拉强度随孔隙率和平均孔径增加而降低，平均孔径小于 30 μm 时抗拉强度随比表面积增加而降 低，大于 30 μm 时随比表面积减小而降低． 焦炭中小孔数量越多抗拉强度越高，大孔数量越多抗拉强度越低． 相同反应率下， H2O 反应后焦炭中小孔数量增加，比表面积大，有利于保护气孔壁结构，抑制高温抗拉强度的降低． 关键词 焦炭; 气化反应; 孔隙结构; 高温; 抗拉强度 分类号 TF526 + . 1 Influence of pore structure features on the high temperature tensile strength of coke GUO Wen-tao1) ，XUE Qing-guo1) ，LING Chao1) ，ZUO Hai-bin1) ，WANG Jing-song1)  ，HAN Yi-hua2) 1) State Key Laboratory of Advanced Metallurgy，University of Science and Technology Beijing，Beijing 100083，China 2) College of Metallurgy and Energy，North China University of Science and Technology，Tangshan 063009，China  Corresponding author，E-mail: wangjingsong@ ustb． edu． cn ABSTＲACT Through measuring the pore structure features of coke reacted with H2O or CO2 using a mercury porosimeter，the influ￾ence of average pore size，specific surface area and pore size distribution on the high temperature tensile strength of coke were studied in this paper． It is found that the porosity and average pore diameter of coke increase with the increase of reaction degree． When the average pore size is less than 30μm，the gasification reaction is mainly pore-creating，and the surface area of coke increases firstly and then decreases with increasing reaction degree; but when the average pore size is more than 30 μm，the gasification reaction is mainly pore-expanding． Compared with CO2，coke reacted with H2O has a smaller average pore diameter，larger specific surface area and ten￾sile strength． The tensile strength of coke decreases with the increase of porosity and average pore diameter． At an average pore diame￾ter smaller than 30 μm，the tensile strength decreases with the increase of specific surface area; but at an average pore diameter larger than 30 μm，the tensile strength decreases with the decrease of specific surface area． The small pore increases the tensile strength of coke，while the large pore decreases the tensile strength． At the same reaction rate，coke reacted with H2O has a large amount of small pores and large specific surface area，which are conducive to protect the structure of the air pore wall and to prevent from the reduction of tensile strength at high temperature． KEY WOＲDS coke; gasification reactions; pore structure; high temperature; tensile strength 收稿日期: 2015--09--18 基金项目: 国家自然科学基金资助项目( 51574023) ; 国家重点基础研究发展计划资助项目( 2012CB720401) ; 河北省自然科学基金--钢铁联合 研究基金资助项目( E2014209144) 焦炭是高炉炼铁过程不可或缺的原料，起提供热 量、还原剂、铁水渗碳和料柱骨架的作用［1--3］． 随高炉