Spinel containing castables are becoming widely popular due to their high slag resistance, spalling resistance, drying behavior and hot strength. Most of the steel plants today use Magnesia-Alumina spinel system (MgAl2O4). Spinel containing castables can be prepared by two methods: direct spinel addition and in-situ spinel formation. The latter option is cheaper but has a drawback of volume expansion during spinel formation, which may lead to cracking. On the other hand, the pre reacted spinel system is expected to show a better hot strength and mechanical behavior. This project is an attempt to study the properties of both such types and present a contrast between them. Also, the effect of two different types of cement, having different alumina composition, was observed
