低阶煤热萃取物与瘦煤共炭化焦炭的微观结构及显微强度研究  

Micro-structure and micro-strength of coke from co-carbonization of lean coal and thermal extract from low rank coal

作　　者：朱亚明[1,2] 唐帅[3] 赵雪飞[1,2] 赵春雷 袁霁 胡朝帅 闫立东[1] ZHU Ya-ming;TANG Shuai;ZHAO Xue-fei;ZHAO Chun-lei;YUAN Ji;HU Chao-shuai;YAN Li-dong(Engineering Research Center of Advanced Coal Coking and Efficient Use of Coal Resources,University of Science and Technology Liaoning,Institute of Chemical Engineering,Anshan 114051,China;Key Laboratory of Chemical Metallurgy Liaoning Province,University of Science and Technology Liaoning,Anshan 114051,China;Sinosteel Anshan Research Institute of Thermo-Energy Co.,Ltd,Anshan 114044,China)

机构地区：[1]辽宁科技大学化工学院,辽宁省先进煤焦化及煤资源高效利用工程研究中心,辽宁鞍山114051 [2]辽宁科技大学辽宁省化学冶金重点实验室,辽宁鞍山114051 [3]中钢集团鞍山热能研究院有限公司,辽宁鞍山114044

出　　处：《燃料化学学报》2018年第9期1036-1043,共8页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(U1361212),辽宁省教育厅青年项目(2017LNQN04)和辽宁科技大学青年项目(2017QN06)资助.

摘　　要：以众唯瘦煤作为主炼焦煤,大同长焰煤萃取物作为添加剂,进行共炭化处理制备坩埚焦。利用偏光显微镜法定量研究焦炭光学显微组分,获得焦炭的各向异性指数(DRAS);采用XRD及分峰拟合的方法研究了焦炭的微晶粒径(L_c)、芳香缩合度(I_a)、石墨化度(g);利用Raman光谱结合分峰拟合的方法研究了焦炭中理想石墨微晶含量(I_g)。对所得焦炭的光学显微组分进行定量分析发现:大同长焰煤热解萃取产物的添加对共炭化焦炭的光学显微组分有显著的影响,利用偏光显微镜法计算出焦炭的DRAS与XRD和Raman计算的焦炭微晶参数呈现很好一致性。并且,焦炭的显微强度与其微观结构关联性极大。Crucible cokes were obtained by co-carbonization of Zhongwei lean coal as main coking coal and thermal extract from Datong long-flame coal as additive.The degree of regularization on anisotropic structure(DRAS)of coke was obtained by quantitative calculation of optical tissue from polarized microscopy.The crystallite size(Lc),aromatic condensation(La)and degree of graphitization(g)have been quantitative calculated by combination of XRD and curve-fitted method.Furthermore,Raman spectrum and curve-fitted method have been used to obtain content of ideal graphite microcrystalline of coke.The quantitative analysis of optical micro-component on obtained cokes shows that addition of thermal extract from Datong long-flame coal has a significant influence on optical micro-component of coke.There is good consistency on DRAS and microcrystalline parameters,which is calculated by the method of polarized microscopy and XRD and Raman spectrum,respectively.Moreover,the micro-strength index of coke is highly correlated with its microstructure.

关 键 词：焦炭 微观结构 各向异性指数 微晶参数 

分 类 号：TQ520[化学工程—煤化学工程]