Brown corundum, also known as fused brown corundum and emery, is a brown artificial corundum made from high-quality bauxite, carbon materials and iron filings by electrofusion reduction in an electric arc furnace, hence the name brown corundum (also known as brown corundum). brown corundum). brown corundum). The main chemical component of brown corundum is AL2O3, and also contains small amounts of Fe, Si, Ti, etc. Brown corundum is widely used in abrasives and refractory materials due to its good performance, wide range of uses and low price.
Uses of brown corundum abrasive tools:
1. Sandblasting - The abrasive has moderate hardness, high density, no free silica, and good toughness. It is an ideal "environmentally friendly" sandblasting material and is widely used in aluminum, copper profile glass, washed jeans precision molds and other fields.
2. Grind-free - grinding-grade abrasives are used in the fields of picture tubes, optical glass, monocrystalline silicon, lenses, watch glass, crystal glass, jade, etc. It is a high-grade abrasive material widely used in China.
3. Resin abrasives - The abrasives have suitable color, good hardness, toughness, suitable particle cross-section type and edge retention. When applied to resin abrasives, the effect is ideal.
4. Coated abrasives - brown corundum is the raw material for sandpaper, emery cloth, and abrasive belts.
5. Hydraulic cutting - using abrasives as the cutting medium and relying on high-pressure hydraulic jets for basic cutting, it is applied to cutting oil (natural gas) pipelines, steel and other parts. This is a new, environmentally friendly and safe cutting method.
Brown corundum is mainly used in refractory materials:
1. Due to its high temperature resistance, corrosion resistance, high strength and other properties, it is used for pouring steel water slides, smelting rare metals, special alloys, ceramics, ironmaking blast furnace linings (furnace walls and pipes); physical and chemical utensils, spark plugs, heat-resistant, Antioxidant coating.
2. Due to its high hardness, good wear resistance, and high strength, it is used in chemical systems as various reaction vessels and pipes, chemical pump components; in making mechanical parts and various molds, such as wire drawing dies and extruded pencil leads. Die mouth, etc.
3. Brown corundum insulation materials, such as corundum light bricks and fiber products, are widely used in various high-temperature furnace walls and furnace tops, and have both high temperature resistance and heat preservation functions.
4. Brown corundum has the characteristics of non-explosion, no powdering and no cracking during application. In particular, the cost performance of corundum is much higher than that of traditional corundum, which makes it a better aggregate and filler for corundum refractory materials.
Other applications of brown corundum:
Functional filler - mainly used for automobile brake parts, special tires, special construction products, etc., and can be used to construct highway pavements. aircraft runway. pier. PARKING. Industrial flooring, sports venues and other wear-resistant materials.
Filter media - is a new application field of abrasives. Granular abrasives are used as the bottom media of the filter bed to purify drinking water or wastewater. It is a new type of water filtration material at home and abroad, especially suitable for beautification of non-ferrous metals: oil drilling mud increases Heavy dose.
