The paper mainly studies the coal-ash resistance to zirconium silicate bonded SiC refractory. Two types of coal-ash tiled SiC refractory and were heated at 1250-1450°C for 40 hours, then XRD pattern and optical microscope were employed to determine the phase composition and microstructure of SiC refractory. It is suggested that zirconium silicate bonded SiC refractory containing Cr2O3 has potential application in burner quarls wi...