Brown corundum, also known as emery, is a brown artificial corundum produced by melting and reducing three raw materials: alumina, carbon materials, and iron filings in an electric arc furnace, hence the name. The main chemical component of brown corundum is AL2O3, its content is 95.00%-97.00%, and it also contains a small amount of Fe, Si, Ti, etc. Brown corundum is the most basic abrasive and is widely used because of its good grinding performance, wide range of applications and low price.
Brown corundum is made of bauxite and coke (anthracite) as the main raw materials, and is smelted at high temperature in an electric arc furnace. Abrasive tools made of it are suitable for grinding metals with high tensile strength, such as various general-purpose steels. , malleable cast iron, hard bronze, etc., and can also make high-grade refractory materials. Brown corundum has the characteristics of high purity, good crystallization, strong fluidity, low linear expansion coefficient and corrosion resistance. It has been verified by dozens of refractory manufacturing companies that this product does not explode, pulverize or crack during application. In particular, its cost performance is much higher than that of traditional brown corundum, making it the best aggregate and filler for brown corundum refractory materials.
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