White Corundum Abrasives

White corundum is a white artificial corundum, like natural corundum gemstones, it has the characteristics of high hardness, high temperature resistance, stable chemical properties and purity. The Mohs hardness of this abrasive media is 9, second only to diamond, the maximum service temperature is close to 2000°C, and the Al2O3 content is greater than 99%, these excellent material properties make it more and more widely used in today's industrial production.

White fused alumina is made of industrial alumina powder, which is melted and smelted in an electric arc furnace at a high temperature above 2000°C, and then cooled and crystallized to obtain a white aluminum oxide frit. Industrial alumina powder also contain alumina, so why bother to smelt it? This is because many of the excellent properties of it come from the α-Al2O3 crystal, while the alumina content of industrial alumina powder is only about 98%, which not only contains other impurities, but also contains Al2O3 isomers, which will be obvious Reduce various properties of corundum material. Therefore, it is necessary to remove impurities through smelting, purify the alumina content, and form α-Al2O3 crystals through recooling and crystallization.

After smelting and cooling, the white fused aluminum oxide frit weighing several tons cannot be used directly in industrial production, so it needs to be processed and crushed to make particles of different sizes to suit various purposes, the classification of this abrasive material according to particle size mainly includes: white corundum segment sand (white corundum sand within two particle size ranges), white fused alumina grain size sand (corresponding to the model required by the standard), white aluminum oxide fine powder (completely passed through a certain sieve Fine sand of the net), white alumina powder (generally ultra-fine powder with a particle size of less than 60 microns).

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