Study on the Influence of Inorganic Mineralizers on Graphitization of Coal under High Temperature and High Pressure Conditions

煤系隐晶质石墨一般是指煤及碳质页岩在岩浆热和地层压力作用下形成的一种特殊矿产。而针对无机矿物对煤系隐晶质石墨成矿的差异性影响尚不明确，在一定程度上限制了煤系隐晶质石墨的勘探与开发以及煤炭资源的综合利用。本文选用汝箕沟无烟煤为研究对象，以FeS、FeCl3和CaCO3为矿化剂，通过拉曼光谱(Raman)和扫描电镜图(SEM)等测试手段，研究高温高压条件下矿化剂对煤石墨化的影响。结果显示，高温高压条件下，FeS、FeCl3和CaCO3对煤向石墨转化的催化效果明显，且催化效果FeS > FeCl3 > CaCO3。Coal bearing cryptocrystalline graphite generally refers to a special mineral formed from coal and carbonaceous shale under the action of magma heat and formation pressure. However, the disparate impact of inorganic minerals on the mineralization of coal bearing cryptocrystalline graphite is still unclear, which limits the exploration and development of coal bearing cryptocrystalline graphite and the comprehensive utilization of coal resources. The anthracite coal from Rujigou Coalmine in Ningxia Hui Autonomous Region of China was selected as the research object, and FeS, FeCl3, and CaCO3 as mineralizers. By using test methods such as Raman spectroscopy (Raman)and scanning electron microscopy (SEM), the effect of mineralizers on coal graphitization under high temperature and high pressure conditions was studied. The results showed that under high temperature and high pressure conditions, FeS, FeCl3, and CaCO3 had significant catalytic effects on the conversion of coal to graphite, and the catalytic effect was FeS > FeCl3 > CaCO3.