White corundum is a kind of artificial abrasive, which is white in color. It mainly contains aluminum oxide, and contains a small amount of iron oxide, silicon oxide and other components. It has dense texture, high hardness, and sharp-edged grains. It is suitable for manufacturing ceramics, resin-bonded abrasives, grinding, polishing, sandblasting, precision casting, etc., and can also be used for manufacturing advanced refractory materials. Small crystal size, impact resistance, crushed by self-grinding machine, mostly spherical particles, clean surface, easy to combine with adhesives, suitable for various high-end products, surface beautification treatment of crafts or hardware products, the surface is white after sandblasting Impurities, eliminating the trouble of cleaning.
White corundum fine powder is harder and brittle than brown corundum, and has stronger cutting force. Good chemical stability and good insulation. It can be used as solid structure and coated abrasives, wet or dry spray sand, suitable for ultra-fine grinding and polishing in the crystal and electronic industries, and making advanced refractory materials; suitable for processing hardened steel, alloy steel, high-speed steel, high-carbon steel, etc. Harder material with higher tensile strength. It is made of high-quality aluminum oxide powder, which is refined and crystallized by electric melting. It has high purity, good self-sharpening, acid and alkali corrosion resistance, high temperature resistance, stable thermal performance, and slightly higher hardness than brown corundum.
After continuous technical improvement and industry trials, white corundum powder has been recognized by customers. It has high hardness, good self-sharpening, excellent grinding and polishing performance. At the same time, after technical improvement, the production cost is slightly reduced. , which becomes complicated by chemical reaction, homogeneous polycrystalline transformation, recrystallization, and co-dissolution, but it is mainly realized by the large surface area and high surface energy of the powder. During the preparation process of the powder, various lattice defects appear on the surface and inside.
It is made of high-quality aluminum oxide powder, which is refined and crystallized by electric melting. It has high purity, good self-sharpening, acid and alkali corrosion resistance, high temperature resistance, and stable thermal performance; its hardness is slightly higher than that of brown corundum, and its toughness is slightly lower. Strong cutting ability, low calorific value and high efficiency; it can be used to make abrasive tools, which are suitable for grinding fine-grained abrasives such as high-carbon steel, high-speed steel and stainless steel, and can also be used for precision casting and advanced refractory materials.
White corundum micropowder has good chemical stability and good insulation. White corundum is harder and more brittle than brown corundum. It has stronger cutting force. It can be used as solid structure and coated abrasive tools. Wet or dry spray sand is suitable for crystal and electronic industries. Ultra-fine grinding and polishing and making advanced refractory materials, etc., suitable for processing hardened steel, alloy steel, high-speed steel, high-carbon steel and other materials with high hardness and high tensile strength. Abrasives can also be used as contact media, insulators and precision casting sand etc.
Micro-powder does not affect the color of the workpiece, and can be used for sandblasting in processes where iron powder residue is strictly prohibited. Micro-powder grade is very suitable for wet sandblasting and lapping operations. The processing speed is fast and the quality is high. The amount of iron oxide contained is extremely low and is suitable for iron. Residual sandblasting operation.
The traditional preparation of micropowder is to melt the raw materials at high temperature in an electric arc furnace to produce white corundum blocks, which are processed and finely crushed, and then subjected to hydraulic classification to be divided into micropowders of different particle sizes. Today, white corundum micropowder is produced by powder Shaped raw materials are formed and heated at a temperature lower than their melting point to make them adhere to each other, bond, eutectic, recrystallize, etc. under the action of additives, and sinter densely and have specific properties.