The difference between brown fused alumina and white fused alumina:
1. Different raw materials: The raw material of brown corundum is bauxite, in addition to anthracite and iron xiao. The raw material of white corundum is alumina powder.
2. Different uses: Brown corundum can be used to make ceramics, resin high-consolidation abrasive tools, grinding, polishing, sandblasting, precision casting, etc. It can also be used to make high-grade refractory materials. White corundum is suitable for grinding fine-grained abrasives such as high-carbon steel, high-speed steel and stainless steel. White corundum can also be used for precision casting and advanced refractory materials.
3. Different performance: Brown corundum has the characteristics of high purity, good crystallization, strong fluidity, low linear expansion coefficient and corrosion resistance. White corundum has the characteristics of high purity, good self-sharpening, acid and alkali corrosion resistance, high temperature resistance, and stable thermal performance. In comparison, the hardness of white corundum is higher than that of brown corundum.
4. The composition is different: Although both brown fused alumina and white fused alumina contain alumina, the alumina content of white fused alumina is more than 99%, and that of brown fused alumina is about 95%.
5. Different colors: Because the content of alumina in white fused alumina is higher than that of brown fused alumina, the color of white fused alumina is white, while that of brown fused alumina is brown-black.
6. Different production: white corundum is produced from alumina powder (the same as the raw material for electrolytic aluminum), while brown corundum is produced from calcined bauxite.
7. Different objects of use: white corundum is used by some high-end users, because it has better cutting power and good polishing effect. It is mostly used for carbon steel, alloy steel, malleable cast iron, hard bronze, etc., while brown corundum is the market It is commonly used, and the amount is relatively large in the market, and it is mostly used for quenched steel, high-speed steel, high-carbon steel, and so on.
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