Identification and analysis of amorphous graphite associated with high metamorphosed anthracite
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Graphical Abstract
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Abstract
Taking anthracite from Taixi and North Korea respectively as references,the amorphous graphite associated with high metamorphosed anthracite was qualitatively and quantitatively analyzed in this study. The demineralized test samples were analyzed through X-ray and Raman spectrum,and then the demineralized test samples were separated by float-and-sink analysis. The results show that the C(002) diffraction peaks of parts of demineralized graphite associat- ed with high metamorphosed anthracite from different sampling positions exist,their peak intensity is different,and the diffraction peaks are broadening. The comparison of G band and D band parameters of Raman spectrum shows that the thermal evolution stage of amorphous graphite associated with high metamorphosed anthracite is between paranthracite and flake graphite. Using the disordered carbon content of Raman spectrum to characterize the anthracite relative con- tent of amorphous graphite associated with high metamorphosed anthracite,and with the content of disordered carbon of Raman spectrum equivalent to the total float content,its corresponding separation density can be considered to be the separation density between amorphous graphite and anthracite of the samples,its value ranges from 1. 665 g / cm3 to 1.681 g / cm3 .
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