Magnesia-chrome brick is mainly used in metallurgical industry, such as building open hearth furnace top, electric furnace top, furnace outside refining furnace and all kinds of non-ferrous metal smelting furnace, in addition to magnesia-chrome brick is also used in cement rotary kiln firing belt and glass kiln heat storage chamber and other parts. Its quality is divided into ordinary magnesia-chrome brick, directly bonded magnesia-chrome brick, half recombined magnesia-chrome brick, recombined magnesia-chrome brick and so on.