工程科学学报2016，Vol.38Issue(7)：930-936,7.DOI:10.13374/j.issn2095-9389.2016.07.006
孔隙结构特征对焦炭高温抗拉强度的影响
Influence of pore structure features on the high temperature tensile strength of coke
摘要
Abstract
Through measuring the pore structure features of coke reacted with H2 O 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 30μm, the gasification reaction is mainly pore-expanding. Compared with CO2 , coke reacted with H2 O 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 30μm, the tensile strength decreases with the increase of specific surface area;but at an average pore diameter larger than 30μm, 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 H2 O 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.关键词
焦炭/气化反应/孔隙结构/高温/抗拉强度Key words
coke/gasification reactions/pore structure/high temperature/tensile strength分类
冶金工业引用本文复制引用
郭文涛,薛庆国,凌超,左海滨,王静松,韩毅华..孔隙结构特征对焦炭高温抗拉强度的影响[J].工程科学学报,2016,38(7):930-936,7.基金项目
国家自然科学基金资助项目(51574023) （51574023）
国家重点基础研究发展计划资助项目(2012CB720401) （2012CB720401）
河北省自然科学基金-钢铁联合研究基金资助项目(E2014209144) （E2014209144）
