1. Brown corundum abrasive is widely used in components of reaction vessels, pipelines and chemical pumps due to its high hardness, high strength and good wear resistance; it is used as mechanical parts and various grinding tools in the machinery industry. Drawing dies, pencil core dies, extrusion nozzles, etc.; making tools, bulletproof materials, mold abrasives, body joints and sealing mold rings.
2. Brown corundum abrasives are used as thermal insulation materials, such as corundum hollow balls, fiber products and corundum lightweight bricks, which have been widely used in the roof and wall of high-temperature furnaces, not only for high temperature resistance, but also for thermal insulation.
3. Brown corundum abrasive is used for processing precious metals, special alloys, ceramics and iron blast furnace linings (walls and tubes) due to its high temperature resistance, corrosion resistance, high strength and other properties. Physical and chemical containers, spark plugs, heat-resistant and anti-oxidation coatings, etc.
In terms of color, it is best to distinguish the color of brown fused alumina. It is usually dark purple and violet. Under the sunlight, the transparency is very high. It is translucent and glossy. This brown fused alumina generally has slightly higher hardness and better wear resistance. Iron content is high and abundant. Brown fused alumina particles are larger and darker in color. Generally, brown corundum abrasives have good self-sharpening and good toughness. The less material a strong magnet absorbs, the better the quality. The grade and quality of brown corundum abrasive can be identified from the color.
2. Shape and size should be distinguished from shape and size, and good brown corundum depends on its original mineral quality. Generally, good main minerals are mainly spherical small particles, with small particle size, strong impact resistance and smooth and shiny surface.
3. From the content of alumina to distinguish the content of brown fused alumina, there are three grades, the quality of the first to third grades gradually weakens, and the quality of brown fused alumina mainly depends on the content of AL2O3. The grade of brown fused alumina is AL2O3 content greater than 95%, so it is often referred to as No. 95 brown fused alumina . Second, the AL2O3 content of the third-grade brown corundum gradually decreases, and the quality also decreases.
