COMPOSITION AND STRUCTURE OF LUXING COAL WITH DIFFERENT PARTICLE SIZES

More than 10 tons of coal samples from Luxing Coal Mining Company, Guizhou Province have beencollected from various points and sieved into different sizes from the as mined products accordingto its market demand and utilization. The series samples with different sizes have been characterizedusing X-Ray diffraction (XRD), Laser Raman (LR), Infrared spectroscope(IR), 13C solid state magicangle spinning nuclear magnetic resonance (13C MAS NMR), and scanning electron microscope. It isseen that the bigger lump coal has higher pyrite content and quartz, the big lump coal normally hashigher inorganic sulphur content, while the coal powder has higher organic sulphur content. Inaddition, the coal powders with smaller size have higher dolomite content. The kaolinite and quartzare present in the coal with various particles size. The carbon in the Luxing Coal is present in goodcrystalline structure, in which 95% of the coal is graphitic structural in the coal with smaller size.