In order to study effect of CaO content on the ash fusibility of high sodium coal,high sodium synthetic coal ash samples with different CaO content were prepared and ash fusion temperatures(AFTs) were measured.Thermodynamic database FactSage 7.0 was applied to simulate the ash melting process,and the mineral conversion was analyzed.The minerals' composition and surface morphology of synthetic coal ash samples were investigated by X-ray diffraction(XRD) and scanning electronic microscope(SEM).The results sho...