The Effect of Carbon Nanoparticles and Calcined Alumina on Mechanical Properties and Corrosion Resistance Behavior of the Magnesia Carbon Refractories

Nowadays, magnesia carbon refractories are very important for the iron and steel industries. It is dueto their unique properties, such as low wet ability with melt iron and steel. Therefore, it is importantto extend the life of the refractory. In this research, the effect of calcined alumina and nano carbon onmechanical strength and corrosion resistance against slag in magnesia carbon refractories was studied.Mechanical strength of cold crushing strength, CCS, was measured. The bulk density, BD, and apparentporosity, AP, were determined, relative to the size and weight measured, using Archimedes methodstandard and corrosion resistance against the slag shrub procedure. Cylindrical 50×50 mm sleswere tempered at 250 °C for 3 h. The corrosion resistance of the sles cocked at 1350 °C for 2h under reducing atmosphere (coke bed) was evaluated. XRD and SEM EDS analyses were used forcharacterizations. The results showed that the combination of calcined alumina, magnesia, graphiteand nano carbon produced very high strength up to 50% and density up to 12.5%, as well as very goodcorrosion resistance. Especially, the sles containing alumina showed better corrosion resistance, ascompared with other sles, due to spinel phase.