Brown Fused Alumina
Brown Fused Alumina (BFA) is a type of synthetic abrasive made from high-quality bauxite and other raw materials in an electric arc furnace. BFA is known for its toughness, high hardness, and excellent wear resistance.
BFA is widely used in abrasive applications such as grinding wheels, sandblasting, and polishing. It is also used in refractory materials, ceramics, and as a raw material for the production of aluminum metal.
BFA is available in different grit sizes and can be used for a variety of applications depending on the desired surface finish and material removal rate. It is often preferred over other abrasives due to its high durability and low dust generation during use.
BFA can also be further processed to produce specialized types of abrasive grains such as microcrystalline grains, which are used for precision grinding and lapping applications, and macrocrystalline grains, which are used for heavy-duty grinding and cutting applications.
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Particle Size
- Common particle size of refractory materials: 0-1, 1-3, 3-5, 5-8mm, 100, 200, 325 mesh.
- Common particle size of abrasives: 12, 14, 16, 24, 30, 36, 46, 60, 80, 100, 120, 150, 180, 200, 220, 240, 280, 325 mesh.
- Common micropowder for polishing and grinding: 400, 600, 800, 1000, 1500, 2000-6000 mesh.
- The granularity of the product can be processed according to the granularity required by the user.
Features
- High Hardness
Brown fused alumina is known for its high hardness, which makes it an excellent abrasive material. Its hardness is due to the strong covalent bonds between the aluminum and oxygen atoms in the aluminum oxide crystals. - High Strength
Brown fused alumina has high strength, making it suitable for use in applications that require a robust and durable material. Its strength is primarily attributed to its dense, crystalline structure. - Chemical Stability
Brown fused alumina is chemically stable and resistant to most acids and alkalis, making it suitable for use in corrosive environments. This chemical stability is due to the strong chemical bonds within the aluminum oxide structure. - Heat Resistance
Brown fused alumina has excellent heat resistance, which means it can withstand high temperatures without losing its physical properties. This heat resistance makes it suitable for use in high-temperature applications such as refractory materials and high-performance abrasives. - Grades
Brown fused alumina is available in various grades, which are determined by the purity of the material and the type of impurities present. The grading system is essential for categorizing the product based on its quality and suitability for specific applications. - Grit Size Selection
Grit size is a critical factor in determining the performance of brown fused alumina in different applications. The size of the grit is usually specified by a number, with higher numbers indicating smaller grit sizes. The selection of the appropriate grit size depends on the desired surface finish and material removal rate.
Applications
- Abrasives
One of the primary applications of brown fused alumina is in the manufacturing of abrasive products such as grinding wheels, sandpaper, and blasting media. Its high hardness and strength make it an excellent choice for cutting, grinding, and polishing various materials, including metals, ceramics, and glass. - Refractories
Brown fused alumina is also widely used as a refractory material, particularly in the production of high-temperature-resistant products such as bricks, castables, and monolithic linings. Its excellent heat resistance and chemical stability make it suitable for use in furnaces, kilns, and other high-temperature applications. - Surface Treatment
Brown fused alumina is used in surface treatment processes such as shot blasting, sandblasting, and surface polishing. Its hardness and abrasiveness make it ideal for cleaning and preparing metal surfaces before painting, welding, or other operations. - Other Applications
Brown fused alumina has other niche applications, including the manufacturing of wear-resistant ceramics, anti-skid materials, and specialized grinding tools.
Parameters
| Application | Grain size | Al2O3 | TIo2 | CaO | SiO2 | Fe2O3 | Magnetic material content% |
| FOR ABRASIVES | F4~F80 P12~P80 | 95.0~95.9 | 1.7~3.4 | 0.42max | 1.0 max | 0.3max | 0.05 max |
| F90~F150 P100~P150 | 94.5~95.9 | 1.7~3.6 | 0.42max | 1.0 max | 0.3max | 0.03 max | |
| F180~F220 P180~P220 | 94.0~95.9 | 1.7~3.8 | 0.45max | 1.2 max | 0.3max | 0.02 max | |
| F230~F800 P240~P800 | 93.5 min | 1.7~3.8 | 0.45max | 1.2 max | 0.3max | – | |
| F1000~F1200 P1000~P1200 | 93.0 min | 4.0max | 0.50max | 1.4 max | 0.3max | – | |
| P1200-P2500 | 92.5 min | 4.2max | 0.55max | 1.6 max | 0.3max | ||
| Application | Grain size | Al2O3 | TIo2 | CaO | SiO2 | Fe2O3 | Magnetic material content% |
| FOR REFRACTORY | 0-1mm 1-3mm 3-5mm 5-8mm 8-12mm | 95.0min | 0.25max | 1.0max | 3.0 max | – | 0.05 max |
| 0-3mm 0-5mm 0-10mm 0-25mm | 95.0min | 0.25max | 1.0max | 3.0max | – | 0.05 max | |
| 180#-0 240#-0 320#-0 | 94.0 min | 0.30max | 1.5max | 3.5 max | – | 0.03 max |
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Founded in 2001, HSA is a leading provider of Silica Fume and Abrasives in China, and also the premium source of high-performance Products for concrete and abrasives industries.
