First, the alumina content, which determines the hardness of the product The alumina content of brown corundum is 94% ~ 75%. The alumina content of white corundum is more than 99.2%. This results in their different colors and characteristics. The color of white corundum is white transparent, and brown corundum is brown black or brown red. In terms of product hardness, white corundum has the highest hardness, followed by brown corundum.
Generally speaking, white corundum is a high-end user, and brown corundum is the product with the largest consumption in the market
Brown corundum is made of high-quality bauxite, anthracite and iron Xiao. It is melted at a high temperature of more than 2000 degrees in an electric arc. It is crushed by an autogenous mill, removed by magnetic separation and sieved into various particle sizes, with dense texture, high hardness and spherical particles, it is suitable for manufacturing ceramic and resin highly consolidated abrasives, grinding, polishing, sand blasting, precision casting, etc,It can also be used to manufacture high-grade refractory materials. Brown corundum has the characteristics of high purity, good crystallization, strong fluidity, low linear expansion coefficient and corrosion resistance. The practice of dozens of refractory production enterprises has verified that the product has the characteristics of no initiation, no pulverization and no cracking in the application process.
In particular, it is much higher than the cost performance of traditional brown corundum, which makes it the best aggregate and filler for brown corundum refractory. White corundum 'is made of high-quality aluminum oxide powder and white corundum refined and crystallized by electrofusion. It has high purity, good self sharpening, acid and alkali corrosion resistance, high temperature resistance and stable thermal performance. White corundum has slightly higher hardness than brown corundum, slightly lower toughness, high purity, good self sharpening, strong grinding ability, low calorific value, high efficiency, acid and alkali corrosion resistance, high temperature and thermal stability.
Abrasive tools made of white corundum grain size sand are 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 high-grade refractory materials. White corundum products have excellent hand feel, fast cutting speed and sharp cutting blades, but the wear resistance is not very high. They are suitable for steel with high hardness and strength. The steel standards of most developed countries are very high, This kind of product is the first choice for cutting carbon steel and high hardness stainless steel. 

Brown corundum products have high toughness, wear resistance and long service life. They are suitable for cutting general steel, reinforcement, channel steel and deformed steel. It will make your work easier