Bright Black Fused Alumina #16 Sandblasting Rust Removal Wear-resistant Black Corundum

Black fused alumina, also known as black aluminum oxide, is a type of abrasive material that is commonly used in various industrial applications. It is made from the high-quality bauxite ore by fusing it in an electric arc furnace at high temperatures. During this process, the aluminum oxide content in the bauxite is reduced, resulting in a material that is predominantly composed of aluminum oxide and iron oxide.

1. Color and Appearance: As the name suggests, black fused alumina is black in color. It has a matte appearance and a high hardness.

2. Hardness: Black fused alumina is known for its high hardness, making it suitable for abrasive applications. It is often used for cutting, grinding, and polishing metals, ceramics, and other materials.

3. Abrasive Properties: It is an abrasive material with excellent cutting and grinding properties. It is used in applications such as sandblasting, grinding wheels, abrasive belts, and abrasive powders.

4. Strength and Durability: It has good strength and durability, making it a reliable choice for applications where wear resistance is essential.

5. Chemical Composition: Black fused alumina typically contains aluminum oxide (Al2O3) as the primary component, along with iron oxide (Fe2O3) and small amounts of other impurities.

1. Grinding and Polishing:

   • Black fused alumina is widely used in the manufacture of grinding wheels, abrasive belts, and abrasive discs.
   • It is employed for grinding and polishing metals, ceramics, and other hard materials. It is particularly effective in achieving smooth and precise surfaces.

2. Surface Preparation:

   • In industries such as automotive, shipbuilding, and construction, black fused alumina is used in sandblasting and shot blasting applications.
   • It is applied to prepare surfaces for painting, coating, or other finishing processes by removing rust, old paint, scale, and contaminants.

3. Cutting:

   • Black fused alumina is used as an abrasive material in cutting wheels or discs for precision cutting of various materials, including stainless steel, carbon steel, and alloys.
   • It provides clean and accurate cuts in manufacturing and metalworking processes.

4. Refractory Industry:

   • In the refractory industry, black fused alumina is sometimes added to refractory materials to enhance their properties.
   • It can improve the resistance of refractories to high temperatures, wear, and corrosion, making them more suitable for demanding applications like furnaces and kilns.

5. Abrasive Blasting:

   • Black fused alumina is used in abrasive blasting cabinets and systems for cleaning and surface preparation in a variety of industrial settings.
   • It helps remove rust, scale, paint, and other surface contaminants from metal surfaces.

6. Lapping and Polishing:

   • In precision machining and optics manufacturing, black fused alumina is used as an abrasive in lapping and polishing processes.
   • It assists in achieving flat and highly polished surfaces on optical lenses, semiconductor wafers, and precision components.

7. Cutting Tools:

   • Some cutting tools, such as cutting discs and abrasive saw blades, are made with black fused alumina as an abrasive material.
   • These tools are used in construction, metalworking, and fabrication.

8. Refractory Castables:

   • Black fused alumina can be used as an aggregate in the formulation of refractory castables.
   • It improves the overall performance and resistance of these materials in high-temperature environments.

9. Abrasive Powders and Compounds:

   • Black fused alumina is ground into fine powders and used in abrasive slurries and compounds for polishing and surface finishing.
   • It is utilized in applications like jewelry making, optics, and electronics manufacturing.

10. Tumbling and Deburring:

    • It is employed in tumbling and deburring processes to remove burrs and sharp edges from metal and plastic components, providing a smooth and finished appearance.