Brown fused alumina is made of high quality bauxite as main material,widely used in refractory industry. Sizes:0-1,1-3mm. Brown Fused Alumina is made by high quality bauxite as main material, fusing and purifying in a pouring electric arc furnace at a temperature of over 2200 celsius degree, and made into different grain sizes through crystal, choosing, crashing, magnetic, separating, screening, ...