... technology and skills 2.corrosion resistant Huilian Brown Alumina of high content of Al2O3 selling well in 2011 Brown corundum is ... temperature in electric spark furances. Al2O3 is the main chemical ingredient of Brown fused aumina, its content is between 94.5% ... , smelting rare metals, special alloys, ceramics, iron-smelting furnace of the lining (walls and tubes); physical and chemical containers , ...