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 its 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.