Aluminum is the third most abundant element in the earth’s crust, constituting about 8% of its total mass. Aluminum is extracted from bauxite, a rock composed mainly of aluminum oxide and aluminum hydroxide minerals. The rock usually includes other materials such as iron hydroxides, clay, silt, and free silica. It most often occurs as a residual soil material in tropical and subtropical areas. It is the primary source of aluminum. Bauxites are typically classified according to their intended commercial application: abrasive, cement, chemical, metallurgical, and refractory.
Common uses for Aluminum Oxide:
Used as an abrasive in the manufacture of sandpaper, polishing compounds, and cutting tools. For abrasive applications, alumina can be used in industrial applications such as grinding operations, pressure blasting, and mass finishing. Abrasive alumina can cut, clean, or polish materials such as metals, wood, glass, ceramics, marble, granite, and other stones.