Brown Fused Alumina is mainly used as a recyclable abrasive in blast cabinets and blast rooms. Brown aluminum oxide is a very hard and sharp abrasive that cleans rapidly. It leaves a sharp anchor profile prior to coating and is suitable for removal of scale, rust and old coating layers.
White fused alumina is widely used as a raw material in refractories, ceramics shapes, grinding wheels, sandpaper, blasting media, metal preparation, laminates, coatings, lapping, polishing, grinding and hundreds of other applications.
The two characteristics of calcined alumina that distinguish it from fused aluminum oxide grains are shape and purity. Calcined alumina grains are normally composed of single platey crystals, whereas fused aluminum oxide grains tend to be fractions of large crystals and blocky in shape.
Fused aluminas: the powerhouse of abrasives
The resultant fused aluminum oxides are synthetic hard minerals based on α-aluminum oxide. Fused aluminum oxides show a value of 9 on the Mohs scale of hardness close to diamond (Mohs 10), the hardest known substance.