Corrosion behavior of different Al₂O₃-MgO-C bricks tested in dynamic conditions

Abstract

The slag corrosion of Al₂O₃-MgO-C refractories for steelmaking ladles is addressed by a dynamic test by considering their characteristics, the experimental approach, and previous cup test data and thermodynamic simulation. To obtain reliable results, an alternative to the current practice of using the samples’ dimensions to estimate the corrosion wear was proposed. The brick with the higher periclase content and high open porosity was less resistant in the dynamic test. However, in the other two bricks, the smaller particles and the lower corrosion resistance of bauxite were considered the determining factors for the greater increase in wear during the dynamic test concerning the cup test.

Keywords:
Al₂O₃-MgO-C refractories; steelmaking ladle; slag corrosion; laboratory testing