It is one of the main products of NO. 1 branch, produced of concentrated bauxite with the advanced process and quality inspection. The main mineral components are corundum and mullite crystal phases. It features excellent hgih-tempreture mechanical strength and chemical corrosion resistance.

In recent years, the modified high-alumina brick for eletric are furnace roof has been developed, having good thermal shock resistance and slag resistance, suitable to the roofs of various kinds of electric furnaces and other furnaces.