Abrasion resistance of alumina based refractory products at elevated temperatures

Abrasion resistances of five kinds of alumina based refractory products at elevated temperatures were determined using a new developed high-temperature abrasion facility. The results show that the wear volume of the refractory products during elastic deformation has a little change with temperature rising, but in the plastic deformation range it drops sharply. The refractory products with a high hardness mineral as the main crystal phase have a better abrasion resistance. Sintering degree has a more obvious effect on the abrasion resistance. For the refractory products with the same main mineral phase, the denser the sintering degree, the better the abrasion resistance is. When a low melting point liquid phase forms in the refractory products at elevated temperatures, the wear volume decreases, and the liquid phase has a more effect on the abrasion resistance than the hardness of the mineral phase. The wear volume has a close relation with hot modulus of rupture ( HMOR). The higher the HMOR, the smaller the wear volume is during elastic deformation. The HMOR and wear volume decrease rapidly with temperature rising during plastic deformation.