Exellent performance makes it the lead of the industry. The bricks consist of fused oxides and spinel and features high density, low porosity, high bonding strength, high hardness, high refractoriess, good anti-wearing, good abrasion resistance, good thermal shock resistance and long using life. They are widely used in various smelting vessels, such as Ausmelt furnaces, Flash furnaces, Kaldo furnaces, Baiyin furnaces, Nolanda furnacs, convertr, SKS smelting furnaces, QSL bottom-blow furnaces and electric cleaning furnaces. Additionally they are also used as the lining material of zinc-volatilizing rotary kiln, cement rotary kilns and glass kilns. Comparing with Cr-Mg, Mg-Al and aluminum silicate bricks, their lives are two times or more.