Abstract: Chromia-free lining materials for gasifier have to be developed with due consideration to environmental requirements.Based on the theory that viscosity of Ti(C,N) containing slags are higher than others.In order to introduce in-situ formed Ti(C,N) and improve the corrosion resistance of refractories.TiO2 is added into novel Al2O3-C materials for gasifier lining, which has been reported in our previous work.The results show that pore structure of Al2O3-C materials is optimized when appropriate TiO2 is added, due to the in-situ formation of Ti(C,N).Moreover, slag viscosity will be increased when slag react with Ti(C,N) containing Al2O3-C materials, so corrosion resistance of this kind of materials is improved.If excessive TiO2 is added into Al2O3-C materials, TiO2 will dissolve into slag at high temperature and result in decreasing of slag viscosity.Corrosion resistance of Al2O3-C materials decreases.

Key words: chromia-free;Al2O3-C;Ti(C;N);viscosity;corrosion resistance