High-alumina (corundum) refractories are used in units with operating temperatures up to 1800 ° C, they provide the necessary stability in contact with the slag, molten metal, molten glass, alkalis and acids. This type of refractories contains > 95% A12O3 and is made from electrofused corundum powders and technical alumina is formed in different ways and fired at 1600-1750 ° C. Corundum refractories are used for manufacturing of plates for slide gates of ladles, articles for lining steel degasser cameras, lenses of high-heaters, covers thermocouples, crucibles for melting glass, metals, etc. Non-shaped refractory corundum, namely, mortars and concretes with corundum filler pipes are used for lining steel degasser, a mass and coating - for the manufacture and repair of refractory linings with an operating temperature> 1700 ° C.