Microstructures and Corrosion Resistance of Al2O3-C Based Refractories to the Melts Containing Titania

摘要

The corrosion resistance of the Al2O3-C based refractories in melts containing titania has been studied by quasistation immersion and rotary immersion.The corrosion rate is decreased with the addition of graphite carbon and ZrO2 in the refractories.The corrosion mechanism of Al2O3-C refractories is the oxidization of graphite carbon by the oxides of the melts and the formation of deteriorate layer.For the Al2O3-C-ZrO2 refractories ,the corrosion behavior is due to the interaction between melts and refractories.The new compounds of FeO.SiO2,SiZrO4,FeO.3CaO,2CaO.SiO2 and CaO.SiO2 are formed in the deteriorate layer.