论文部分内容阅读
Corrosion effect of ladle furnace (LF) refining slag on fired MgO-CaO bricks with about 34% CaO was studied by static crucible method, and corrosion mechanism was analyzed by techniques of scan electron micrograph, energy dispersive spectrometer, and X-ray diffraction. The results show that: MgO-CaO bricks exhibit excellent corrosion resistance but poor penetration resistance to LF refining slag; oxidation of (Mg·Fe)O in reaction zone results in volume expansion forming cracks; penetration of 2CaO·Fe2O3 (C2F) from slag to MgO-CaO bricks increases liquid phases which accelerates corrosion of the bricks; a protective layer of 2CaO·SiO2 formed on reaction interface prevents penetration of C2F to the bricks.
Corrosion effect of ladle furnace (LF) refining slag on fired MgO-CaO bricks with about 34% CaO was studied by static crucible method, and the corrosion mechanism was analyzed by techniques of scan electron micrograph, energy dispersive spectrometer, and X-ray diffraction. The results show that: MgO-CaO bricks exhibit excellent corrosion resistance but poor penetration resistance to LF refining slag; oxidation of (Mg.Fe) O in reaction zone results in volume expansion forming cracks; penetration of 2CaO.Fe2O3 (C2F) to MgO-CaO bricks plus liquid phases which accelerates corrosion of the bricks; a protective layer of 2CaO.Si02 formed on the reaction interface prevents penetration of C2F to the bricks.