不同QI含量混合沥青对各向同性焦镶嵌结构及各向同性度的影响研究  

Study on impact of mixed pitch with different QI contents on isotropic coke mosaic structure and isotropic degree

作　　者：张海永[1] 张世纪 李靖 杨昱 Zhang Haiyong;Zhang Shiji;Li Jing;Yang Yu(School of Chemical&Environmental Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;Taiyuan Shenghong Carbon Materials Co.,Ltd.,Qingxu Shanxi 030400,China)

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]太原晟宏炭材料有限公司,山西清徐030400

出　　处：《煤化工》2024年第S1期41-45,79,共6页Coal Chemical Industry

基　　金：国家自然科学基金(21506251);国家重点研发计划(2016YFB0600305)。

摘　　要：通过煤焦油沥青混合不同比例的重相沥青,制备出不同QI含量的混合沥青。混合沥青经过炭化和煅烧,制备出微观结构上以镶嵌结构为主、各向同性度在1.1以内的各向同性焦。利用偏光显微镜、扫描电镜、XRD和Raman光谱仪对焦的微观结构进行分析,并对10种煅后焦的各向同性度进行研究。结果表明:随着沥青中QI含量的增加,生焦的镶嵌结构发展更加均匀、微观尺寸逐步减小,煅后焦的理想石墨微晶含量逐渐降低、石墨化度接近于0、各向同性度也接近于1。The mixed pitch with different QI contents was prepared by mixing coal tar pitch with different proportions of heavy phase pitch.The mixed pitch was carbonized and calcined to prepare isotropic coke with mainly mosaic structure and an isotropic degree of less than 1.1.Polarizing microscopy,scanning electron microscopy,XRD and Raman spectroscopy were used to analyze the microstructure of coke,and the isotropic degree of ten types of calcined cokes was studied.The results showed that with the increase of QI content in pitch,the mosaic structure of green coke developed more uniformly,the microscopic size gradually decreased,the ideal graphite crystallite content of calcined coke gradually decreased,the graphitization degree was close to 0 and the isotropic degree was also close to 1.

关 键 词：煤焦油沥青 重相沥青 QI 镶嵌结构 各向同性焦 各向同性度 

分 类 号：TQ520[化学工程—煤化学工程]