Study on the graphitization of the mixture of anthracite and needle coke
The use of anthracite coal to prepare artificial graphite is one of the important ways to realize the high-value utilization of coal,but the degree of graphitization is difficult to improve because of the high impurities in coal and the complex structure of organic macromolecules.Needle coke,as a raw material for the preparation of high-quality artificial graphite,is in tight supply.This paper com-bines the respective advantages of anthracite and needle coke to carry out a hybrid graphitization study.The characteristics of artificial graphite prepared with different mixing ratios were studied,and the aromatic structure evolution of graphitized products prepared with different mixing ratios during heat treatment was compared and characterized with the anthracite and oil needle coke as the research ob-jects.The experimental results show that the graphitization degree of pure anthracite-based graphite is 80.61%,and that of pure needle coke-based graphite is 86.42% .Compared with the direct graphitization of anthracite,the graphitization degree of the mixed graphite products gradually increased with the increase of needle coke blending.It was also found that the graphitization degree of the graphitiza-tion products blended with 75%～95% needle coke was significantly enhanced up to 89.18% compared to pure needle coke based graphite.In addition,the resulting graphitized products have a higher degree of sp2 hybridization ordering,and the 3D graphite lattice development tends to be perfected,and the HRTEM exhibits the process of higher orientation,increased length,and significant en-hancement of the ordering of the aromatic stripe arrangement.
Needle cokeanthracite coalgraphitizationmicrocrystalline structurecoal based graphite
NETL
NSTL
万方数据
