Al2O3 ceramic-lined composite gun for coal-dust-injection produced by combustion synthesis method exhibited low service life as a result of low ductility and low thermal shock resistance of Al2O3 ceramic-lined layer. The ceramic-lined curved composite gun for coal-dust-injection with high strength and ductility can be produced successfully by introducing ZrO2 into （CrO3 +Al） system based on SHS gravitational separation method

in which ceramic-lined layer consists of eutectic Al2O3-ZrO2 composite ceramics. ZrO2 fiber with nano-micron size in diameters can enhance the ceramic matrix

and rod-like eutectic structure with orientation growth can improve the toughness of the ceramics as a result of rod-like eutectic grain bridge and pull-out

which can effectively improve the elevated strength and wear resistance of ceramic lined layer

so the service life of coal-dust-injection gun is greatly improved.