Abstract:

In order to understand the operational performances of bauxite based β-SiAlON new type raw material for practical application in the future,this paper studies the effects of bauxite based β-SiAlON on conventional physical properties,hot modulus of rupture,thermal shock resistance and slag corrosion resistance of MgO-SiO2-H2O combined Al2O3-MgO castables.The results showed that bauxite based β-SiAlON fines have minor negative effect on physical properties of the samples which were sintered at 1 550℃ for 3 hours and have little effect on hot modulus of rupture of the samples which were embedded carbon at 1 400℃,and improve the thermal shock resistance.Residual strength retention rate increased from 16.27% to 30.82% and slag corrosion resistance decreased obviously with the increase of β-SiAlON addition.