Effect of Micron and Nano MgAL2O4 Spinel Addition on the Properties of Magnesia-Carbon Refractories

Abstract

Magnesia- carbon (MgO-C) refractory bricks have been used in the slag line of ladles due to its superior slag penetration resistance and excellent thermal shock resistance at high temperatures. However, the life of this bricks has become limited on prolonged use due to its poor oxidation resistance as well as low strength at high temperatures. Thus, the physical and chemical properties of MgO-C refractories could be improved by the addition of suitable additives in micron or nano range. Magnesium aluminate (MgAl2O4) spinel has been recognized as one of the most effective refractory material due to its excellent wear and slag resistance. The particle size distribution of MgAl2O4 spinel is also important factor that influence both the physical and chemical properties of refractories. Hence, the present work deals with the improvement of the physical and chemical properties of MgO-C refractories with the addition of MgAl2O4 spinel in micron and nano range.