The difference between brown corundum grinding wheel and white corundum grinding wheel
1, the raw material is different: brown corundum raw material is bauxite, in addition to anthracite and iron Xiao. While the raw material of white corundum is alumina powder.
2, the color is different: because the content of alumina in white corundum is higher than brown corundum, so white corundum color is white, brown corundum is brown-black.
3, the composition is different: although brown and white corundum both contain alumina, but the alumina content of white corundum is more than 99%, brown corundum alumina content in about 95%.
4, hardness is different: white corundum hardness is slightly higher than brown corundum. White corundum abrasives belong to the crystal compound, have better hardness and toughness, crystal size is fine, good wear resistance, but is a higher production cost, lower production, so the price is higher. Brown corundum abrasives have medium hardness, weaker grinding effect, the price is cheaper.
5, different performance: brown corundum has high purity, good crystallization, strong fluidity, low coefficient of linear expansion, corrosion resistance. White corundum has the characteristics of high purity, good self-sharpening, acid and alkali corrosion resistance, high temperature resistance, and stable thermal state performance. Comparatively speaking, the hardness of white corundum is higher than brown corundum.
6, the use of different objects: white corundum is used by some high-end users, because it cutting strength is better, polishing effect is also very good, mostly used for carbon steel, alloy steel, malleable cast iron, hard bronze, etc., while brown corundum is commonly used in the market, but also the market use is relatively large, more for tempered steel, high-speed steel, high carbon steel and so on.
7, smelting process is different: brown corundum is bauxite high temperature melting, after redox reaction manufacturing, white corundum is bauxite melting crystallization and become.
8, the use of different:
Brown corundum: used for grinding wheels, sandblasting, free grinding, resin abrasives, coated abrasives, functional fillers, filter media, refractory materials
White corundum: used in ceramic manufacturing, resin cemented abrasives and sandblasting, polishing, grinding, precision casting and advanced refractory materials