White alumina, also known as alumina, is a type of artificial abrasive with a content of over 99% aluminum oxide (Al2O3). It is a uniform small particle in the form of white sand or powder, with a slight amount of floating dust. White corundum is made from high-quality aluminum oxide powder as raw material, which is melted at high temperatures above 2000 degrees in an arc and then cooled.

White corundum abrasive is suitable for surface beautification treatment of various high-end products, processes, or hardware products. Fine grained white corundum can be used as the first for polishing and grinding. Can be used as a fixed and coated grinding tool, suitable for processing hardened steel, alloy steel, high-speed steel, high carbon steel and other materials with higher hardness and tensile strength.

The hardness of white corundum is slightly higher than that of brown corundum, and its toughness is lower than that of brown corundum. During grinding, the abrasive particles are prone to fragmentation, so the grinding heat is small. It is suitable for manufacturing grinding wheels for precision grinding of quenched steel, high carbon steel, high-speed steel, and thin-walled parts, and the cost is higher than that of brown corundum.

The characteristics of white corundum

1. Uniform particle size, used for hydraulic cutting with smooth cutting surface, good cutting performance, and fast speed;

2 particles have high purity and few impurities, so the cutting environment is good;

3. Good quality, less wear on accessories, reducing costs.

Advantages of white corundum products:

1. It does not affect the color of the processed parts;

2. It can be used for sandblasting in processes where residual iron powder is strictly prohibited; Micro powder level is very suitable for wet sandblasting and polishing operations;

3. Fast processing speed and high quality;

4. The extremely low content of iron oxide in 4 is suitable for sandblasting operations that strictly prohibit iron residue;

5. Go through the acid washing step to remove impurities.

The difference between white corundum and brown corundum:

The raw material for brown corundum is bauxite, as well as anthracite and iron oxide. The raw material of white corundum is aluminum oxide powder.

1 Different uses: Brown corundum can be used to manufacture ceramics, resin high consolidation grinding tools, as well as grinding, polishing, sandblasting, precision casting, etc. It can also be used to manufacture advanced 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.

2 Performance differences: Brown corundum has the characteristics of high purity, good crystallization, strong fluidity, low coefficient of linear expansion, 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. Compared to brown corundum, white corundum has a higher hardness.

3 Composition difference: Although both brown and white corundum contain alumina, the alumina content of white corundum is over 99%, while the alumina content of brown corundum is around 95%.

4 The target audience is different: White corundum is used by some high-end users because it has good cutting force and polishing effect. It is mostly used in carbon steel, alloy steel, malleable cast iron, hard bronze, etc., while brown corundum is widely used in the market and is also widely used in the market, mostly used in firing steel, high-speed steel, high carbon steel, etc.