▉[ White corundum for oilstone ]: The most commonly used white corundum powder for the production of oilstone, fused alumina powder 800 mesh 1000 mesh 1200 mesh 1500 mesh 2000 mesh.
▉【Product Specifications】: white corundum micropowder, fine powder, section sand, grain size sand of various specifications
▉[Scope of application]: Used for sandblasting, polishing and derusting. High-quality white corundum sand is available from stock.
▉ [Product Introduction]:
White corundum is made of industrial alumina powder, which is smelted in an electric arc at a high temperature above 2000 degrees and then cooled. After crushing and shaping, magnetic separation to remove iron, and sieving into various particle sizes, it has a dense texture and high hardness. The hardness of white corundum is slightly higher than that of brown corundum, with slightly lower toughness, high purity, good self-sharpening, strong grinding ability, low calorific value, high efficiency, acid and alkali corrosion resistance, high temperature resistance, and good thermal stability
- Physical properties of white corundum
Moh’s hardness 9.0 Bulk density 1.75-1.95g/cm true density 3.95g/cm Bulk density 3.6 melting point 2250℃ Operating temperature 1900℃ - Chemical composition and chemical content of white corundum
Al2O3 Fe2O3 Na2O SiO2 Duan sand 99.5% 0.04% 0.06% 0.3% powder 99.0% 0.1% 0.08% 0.35% grain size sand 99.5% 0.04% 0.04% 0.23% Micropowder 99.2% 0.06% 0.08% 0.35%
It is suitable for the manufacture of ceramics, resin-bonded abrasive tools, grinding, polishing, sandblasting, precision casting (corundum for precision casting), etc. It can also be used to manufacture high-grade refractory materials, most of which are for export, and a certain amount of supply to domestic users. Its abrasive tools are suitable for grinding high carbon steel, high speed steel, etc. It can also be used as grinding and polishing materials; precision casting, spraying materials, chemical catalyst carrier, special ceramics, advanced refractory materials, etc.
The granularity of the product can be processed according to the granularity required by the user. The general particle size number is F6~F220, and its chemical composition varies depending on the particle size. The prominent feature is that the crystal size is small and impact resistant. If it is processed and crushed by an autogenous mill, the particles are mostly spherical particles, and the surface is clean and easy to combine with a binder.
Density of white corundum: The density is divided into two types, one is the bulk density of white corundum, and the other is the true density of white corundum.
The bulk density is 1.53~1.99g/cm3. The bulk density of the abrasive is related to the particle size, particle size composition, variety, particle shape and other factors of the abrasive. Generally speaking, the bulk density of the coarse-grained abrasive is higher than that of the fine-grained abrasive. The bulk density is greater than the single particle size density. The true density of the particles is 3.90~4.0g/cm3, and the true density of the abrasive refers to the mass of the abrasive contained in the unit volume (excluding the volume of the open pores). The basic particle size of white corundum is 45%~55%. The basic particle size is an important indicator to ensure the grinding effect. It should be properly controlled during production, but the production speed may slow down.
