Abstract
ABSTRACT Anthracite can be used to produce graphite. This paper takes Taixi anthracite as the research sample. The changes of micro-morphology and lattice structure of carbon during graphitization were characterized using scanning electron microscope (SEM) and transmission electron microscope (TEM), to explore the change from stereo organic complex structure to planar ordered structure. The results showed: carbon atoms in different chemical environments in the original anthracite would have different microstructures after the heat treatment at high temperature. We found polycrystalline graphite, monocrystalline graphite, and microsphere intermediates. This means that the graphitization process of anthracite is a complex process with multiple conversion mechanisms. By adjusting the content of coal ash, the products of coal-based graphite with different crystal structure can be obtained.
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