Patents

Magnesia-rich magnesium aluminate spinel is extensively used as a shaped refractory for application in cement rotary kilns, steel ladles, and various secondary refining vessels of steel-making processes. The conventional sintering process of refractory for the development of the spinel phase and its densification requires anything 415 between 10-12 hours in a normal furnace involving a long-range heating schedule. However, the invention relates to a process by which Magnesia rich Magnesium Aluminate spinel can be formed and densified through thermal plasma processing utilizing Indian natural Magnesite and Alumina. The major advantages of thermal plasma fusion over others are that it promotes rapid densification and quick 420 formations of spinel phase accompanied by high throughput in a very short period of time and generates a clean reaction atmosphere for the production of high purity materials.