Brown Fused Alumina

Brown corundum, commonly known as emery, is a tan artificial corundum obtained by melting and reducing three raw materials of bauxite, carbon material and iron filings in an electric arc furnace, hence the name. The main chemical composition of brown corundum is AL2O3, its content is 95.00%-97.00%, and it also contains a small amount of Fe, Si, Ti and so on. Brown corundum is the most basic abrasive and is widely used because of its good grinding performance, wide application range 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. The abrasive tools made of it are suitable for grinding metals with high tensile strength, such as various general steels. , malleable cast iron, hard bronze, etc., and can also manufacture advanced refractory materials. Brown corundum has the characteristics of high purity, good crystallization, strong fluidity, low coefficient of linear expansion and corrosion resistance. It has been verified by dozens of refractory production enterprises that the product has the characteristics of no explosion, no pulverization and no cracking during the application process. In particular, it is much more cost-effective than traditional brown corundum, making it the best aggregate and filler for brown corundum refractories.

Physical properties

Brown corundum application range:

Brown corundum is called the teeth of the industry: mainly used in refractory materials, grinding wheels, and sandblasting.

1. It is used to manufacture advanced refractory materials, castables, refractory bricks, etc.;

2. Sandblasting – moderate abrasive hardness, high bulk density, no free silica, large specific gravity, good toughness, it is an ideal “environmental” sandblasting material, widely used in aluminum profiles, copper profile glass, washed jeans Precision molds and other fields;

3. Free grinding – grinding grade abrasives, which are used in free grinding in the fields of picture tubes, optical glass, single crystal silicon, lenses, watch glass, crystal glass, jade and other fields.

4. Resin abrasives – abrasives with suitable color, good hardness, toughness, suitable particle section type and edge retention, applied to resin abrasives, the effect is ideal;

5. Coated abrasives – abrasives are the raw materials for manufacturers of sandpaper and gauze;

6. Functional fillers – mainly used for automobile brake parts, special tires, special building products, etc. It can be used as wear-resistant materials for building highway roads, airstrips, docks, parking lots, industrial floors, sports venues, etc.;

7. Filtration medium – is a new application field of abrasives. Granular abrasives are used as the bottom medium of the filter bed to purify drinking water or waste water. It is a new type of water filtration material at home and abroad, especially suitable for non-ferrous metal mineral processing: oil drilling mud weighting agent ;

8. Hydraulic cutting – using abrasives as the cutting medium and relying on high-pressure hydraulic jets for basic cutting, it is used in the cutting of oil (natural gas) pipelines, steel and other components. It is a new, environmentally friendly and safe cutting method;