Corrosion Study of MgO-C Bricks in Contact with a Steelmaking Slag

BENAVIDEZ, EDGARDO; BRANDALEZE, ELENA; MUSANTE, LEONARDO; GALLIANO, PABLO

Procedia Materials Science

Elsevier

Año: 2015 vol. 8 p. 228 - 235

MgO-C bricks are extensively used as lining work on different steel containers. Due to the high temperatures of the process,these refractories are subjected to severe wear and corrosion processes, principally in the area of contact with the slag. Theseslags have variable contents of CaO, SiO2, Al2O3, MgO and FeO, varying in composition according to the process stage. In thispaper, cup tests were performed at 1650 °C during 2 hours in air, using three kinds of commercial MgO-C bricks. They were putin contact with a high basicity slag. The corrosion degree and decarburization level sufferered by the refractories were analyzedand compared. Microstructural observations were performed in order to postulate the probable corrosion mechanisms acting oneach material.