How to Identify High Quality Brown Fused Alumina?

Brown fused alumina is made of bauxite, coke(anthracite) used as main raw materials smelting in the high temperature electric arc furnace. The abrasive products made of brown fused alumina, are suitable for grinding the high tensile metals, such as all kinds of steel, malleable cast iron, hard bronze, etc., and also can make advanced refractories.

The principal component of brown fused alumina is the alumina, and the aluminum content is used to distinguish the grades. The lower the aluminum content is, the lower the hardness.

Product sizes are made according to the international standard and national standard and can be processed according to user requirements. Gm grain sizes are F4-F320, whose chemical composition is different depending on the size of the particle size. The outstanding characteristic is that small crystal size can have impact resistance. Because the particles are spherical particles, and their surfaces are dry and clean, it is easy to bond.

Brown fused alumina has dense texture, high hardness and globular particles, suitable for manufacturing ceramic porcelain, resin high bonded abrasive products and grinding, polishing, sandblasting, precision casting, etc., which can also be used for manufacturing advanced refractories.

Brown fused alumina has many characteristics, such as high purity, good crystallization, strong liquidity, low linear expansion coefficient, corrosion resistance, etc. The dozens of refractory production enterprises have proved that the product in the application has no initiation, pulverization and cracking characteristics. Especially its cost performance is far higher than the traditional brown fused alumina, which makes it become the best aggregate and filling material in the brown fused alumina refractory.

Where is the difference between white fused alumina and brown fused alumina? White fused alumina has high purity, good self-sharpening, naisuanjian corrosion, high temperature resistant, stable thermal state performance, etc. The hardness of white fused alumina is slightly higher than that of brown fused alumina, whose toughness is slightly low, but has good self-sharpening, high grinding ability, low calorific value, high efficiency, good thermal stability, acid and alkali corrosion resistance and high temperature resistant.

White fused alumina abrasive products are suitable for grinding high carbon steel, high speed steel, stainless steel, and other granular abrasives, and it can also be used for precision casting and high-grade refractory materials. White fused alumina sand segment: 0-1mm 1-3mm 3-5mm 5-8mm; physical and chemical indicators: Al2O3≥99% Na2O≤0.5% CaO ≤0.4%. Brown fused alumina is made of bauxite, anthracite coal, scrap iron used as the main raw materials smelting in the electric arc furnace, which has good toughness and high temperature resistance as high as 1850 ℃.The microhardness: 1800-2200Kg/ mm2; volume density≥3.85g/cm3, it can be used as not only refractory materials, but also abrasives.