Abstract: Magnesia-hercynite refractory was prepared by reaction sintering , using magnesia and hercynite as raw materials.The influences of hercynite addition by 1%, 3%, 5%, 7%, 9% and 11% on the properties of magnesia-hercynite refractory were studied . The phase composition of specimens was determined by XRD and the microstructure was observed by SEM .The results show that the thermal shock resistance and coating adhesion ability of magnesia-hercynite refractory improve and the refractoriness under load decrease with the increasing of the content of hercynite within the range from 1% to 11%.The magnesia-hercynite refractory has bigger bulk density , higher cold crushing strength and smaller apparent porosity when the content of hercynite is 5%.

Key words: reactive sintering;hercynite;magnesia-hercynite refractory;coating adhesion ability;cement rotary kiln