添加无烟煤对焦炭微晶和气孔结构的影响  

Effect of Anthracite in Coal Blend on Micro-Crystal and Pore Structure of Coke

作　　者：房永征[1] 曹银平[2] 金鸣林[1] 杨俊和[1] 钱湛芬[3] 

机构地区：[1]上海应用技术学院材料工程系,上海200235 [2]宝山钢铁股份有限公司炼铁厂,上海200941 [3]安徽工业大学化工学院,安徽马鞍山243002

出　　处：《钢铁》2006年第10期16-18,22,共4页Iron and Steel

基　　金：上海市高校优秀青年教师后备人才资助项目(04YQHB162);上海教委重点学科资助项目(Y0401)

摘　　要：根据焦炭的XRD谱图及SCHERRER’S公式研究了添加无烟煤炼焦后焦炭的微晶结构参数的变化。试验结果表明:添加无烟煤可以促进焦炭中微晶的发展,使焦炭微晶结构参数La、Lc和石墨化度增大。利用氮气吸附方法分析了焦炭气孔结构的变化,结果发现:添加无烟煤炼焦后焦炭的微孔体积、比表面积和平均孔径都有显著的降低。根据FHH模型计算了焦炭的分形维数。结果表明:在焦炭中存在分形结构,添加无烟煤炼焦后焦炭的分形维数降低,焦炭表面变光滑。Coking was carried out by use of coal blends with anthracite. The change in structure of micro-crystals of coke was investigated according to coke XRD pattern and Scherrer＇s equation. The results reveal that the addition of anthracite facilitates the growth of micro-crystals and the increase of crystal parameters La, Lc and graphite degree, g. The pore structure of coke was measured by nitrogen adsorption. It was found that the micro pore volume, specific surface area and average pore diameter were markedly decreased by adding anthracite to coal blend. The fractal dimensions of coke were calculated according to FHH model. It was shown that there exists fractal structure network in coke, and moreover, fractal dimensions of coke is decreased and coke surface becomes smooth due to anthracite addition.

关 键 词：无烟煤 焦炭 微晶 气孔结构 分形维数 

分 类 号：TF526.1[冶金工程—钢铁冶金]