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利用煤岩显微镜观测喷吹煤的微观组织,发现内含与煤的组织形貌相异的杂质。为了鉴别该杂质,对样品做了热重分析以及偏光组织分析,并采用煤岩相分析仪、分光光度计测定反射率的值。结果表明,热重DTG曲线有两个明显不同的峰值,证实杂质的存在;杂质的偏光组织与焦炭各向同性类似,与半焦标准样品对比干涉光均为一级红色;杂质的反射率平均值为4.6左右,远远大于喷吹煤的镜质组反射率。综合所有性质分析可知其杂质为半焦。
The microstructure of PCI coal was observed using a coal-rock microscope and found to contain impurities that differed from those of coal. In order to identify the impurities, the samples were analyzed by thermogravimetric analysis and polarized light microscopy, and the reflectivity values were determined using a coal phase analyzer and a spectrophotometer. The results show that there are two distinct peaks in DTG curve of thermogravimetry, confirming the existence of impurities. The polarization structure of impurities is similar to that of coke, and the interference light is primary red in comparison with the semi-coke standard sample. The average reflectance of impurities Value of 4.6 or so, far greater than the injection of coal vitrinite reflectance. Comprehensive analysis of all the properties of its impurities are semi-coke.