Corundum refractories used in

Brown fused alumina is a high-grade synthetic material. Is the use of high-quality bauxite as main raw material, coke, iron and other auxiliary materials, high-temperature smelting in electric arc furnace purified from.
Generally were brown corundum, Al2O3 ≥ 94.5%, SiO2 ≤ 2.5%, TiO2 ≤ 3.5%, Fe2O3 ≤ 1%, mineral composition to α-Al2o3 main center of the diamond-shaped crystal, slab type and with crack particles have more peripheral silicon oxide, calcium Melt Crystallization, elongated plate, the coarse crystal grains become skeletal-like sheet. Corundum hue is largely dependent on the remnants of the titanium oxide.
Corundum is mainly used as an abrasive. Refractory materials have been widely used in recent years, such as hooks castable, no blisters mud, corundum brick, precast, air brick, ladle brick, magnesia carbon bricks.
Brown fused alumina for refractory aggregate and powder is generally used to do, it has the advantage of high refractoriness, wear resistance, erosion, corrosion, bulk density, high alumina content, mainly for aluminum lines and alumina. When do products have a high load softening temperature and high temperature volume stability. But corundum impurities in the products in the course of life. Since smelting impurities not removed completely, so corundum also contains six calcium aluminate, calcium plagioclase, spinel, rutile and other times crystalline phase and glass phase, ferro alloys and solid solutions. In a large sense, corundum smelting process and smelting time determines the performance and quality of its products.