Brown aluminum oxide also named brown fused alumina,,it is a tough, durable abrasive material made from bauxite and processed in high-temperature furnaces. Its high hardness and angular particle shape make it suitable for sandblasting application.
The production of brown aluminum oxide involves a high-temperature fusion process in an electric arc furnace. First, carefully selected raw materials, primarily high-quality bauxite, are mixed with additives such as iron filings or coke to enhance the melting process. The mixture is then melted at temperatures exceeding 2000°C to achieve complete fusion. During this stage, impurities are removed, and the material crystallizes to form dense and tough alumina.
After cooling, the solidified material is crushed and graded into various sizes to meet specific industrial requirements. Finally, the product undergoes quality inspection to ensure consistency and performance standards, making it suitable for applications in abrasives, sandblasting, and refractory materials.
Grain size distrubition:
According to ISO, ANSI, FEPA and JIS. Size Available: .
Other sizes can be produced by customer’s special request..
Brown Aluminum Oxide For Sandblasting:
Brown aluminum oxide plays a crucial role in the sandblasting field due to its unique combination of hardness, durability, and angular particle shape. It is highly effective for a variety of surface preparation tasks, providing reliable performance in demanding industrial environments.
Key Functions in Sandblasting
1.Surface Cleaning:
Brown aluminum oxide is used to remove contaminants such as rust, mill scale, and old coatings from surfaces. Its sharp, angular grains ensure efficient material removal, leaving the substrate clean and ready for further processing.
2.Deburring and Edge Preparation:
This abrasive is ideal for refining the edges of metal parts, removing burrs, and achieving precise finishes. Its toughness allows for consistent results, even with hard metals.
3.Surface Profiling:
It creates a uniform surface profile, which is critical for enhancing the adhesion of paints, coatings, and adhesives. Industries like automotive and aerospace often rely on brown aluminum oxide for preparing parts before applying protective layers.
4.Versatility Across Materials:
Brown aluminum oxide can be used on a wide range of materials, including metals, glass, ceramics, and stone. This versatility makes it a popular choice for both heavy-duty applications and delicate work like etching glass or preparing medical devices.
5.Reusable and Cost-Effective:
Its high toughness ensures multiple cycles of use, making it a cost-effective option for industrial sandblasting.
This report provides a detailed analysis of the physical and chemical properties of brown aluminum oxide(BFA) used in sandblasting applications. The results are based on testing conducted in accordance with international standards, ensuring reliability and accuracy.
2. Sample Details
The brown aluminum oxide sample was sourced from certified production batches and tested under controlled laboratory conditions. The sample was prepared in accordance with ISO 11126-4 for non-metallic abrasives.
3. Chemical Composition
The chemical composition of the sample was analyzed using X-ray fluorescence (XRF). Results are as follows:
Component
Content (%)
Aluminum Oxide (Al₂O₃)
95.5
Iron Oxide (Fe₂O₃)
0.25
Silicon Dioxide (SiO₂)
1.20
Titanium Dioxide (TiO₂)
2.00
4. Physical Properties
The physical properties were measured following ASTM C128 and ISO 9286 standards. Results are as follows:
Property
Value
Bulk Density (g/cm³)
3.90
Hardness (Mohs)
9.0
Grain Shape
Angular
Specific Gravity (g/cm³)
3.95
5. Conclusion
The brown fused alumina sample meets international standards for sandblasting applications. Its high aluminum oxide content, excellent hardness, and angular grain shape ensure optimal performance in abrasive processes. These properties make it suitable for a variety of surface preparation and cleaning applications.
