What Is The Function Of The White Powdery Product?

White Corundum for Abrasives

Made from high-purity alumina powder, melted and crystallized in an electric arc furnace at temperatures exceeding 2000°C, this artificial abrasive is the high-quality white corundum needed for customized machining. Due to its dense crystal structure, high purity, high hardness, and moderate toughness, it is widely used in grinding wheels, polishing materials, coated abrasives, and precision grinding tools.

The typical Al₂O₃ content is ≥99.3%, while impurities such as Fe₂O₃ ≤0.2% and SiO₂ ≤0.4% are relatively low. The high purity of white fused aluminum oxide ensures grinding efficiency and surface finish, minimizing scratches and contamination on the workpiece surface. It is generally suitable for machining stainless steel, glass, ceramics, and other materials in high-cleanliness environments. Its high hardness and controllable toughness ensure stable grinding performance, with a Mohs hardness of 9.0 and a microhardness of 2100–2300 kg/mm². Therefore, the high-quality white aluminum oxide we produce for our customers features a highly uniform crystal structure, ensuring sharp grinding edges and resistance to chipping, high grinding efficiency, and low heat generation. White corundum with strictly controlled particle size distribution improves abrasive tool consistency and complies with national safety and quality standards. We offer customized services to tailor a full range of particle sizes to meet customer needs. Furthermore, the uniform particle morphology and size distribution stabilize the cutting force of the grinding wheel or sandpaper, significantly extending the product's lifespan when processed into other white fused aluminum oxide abrasive tools. Excellent heat resistance and chemical inertness → Suitable for high-load grinding. With a melting point of 2050°C, it can maintain crystal integrity under high-speed dry grinding or high-pressure conditions. It does not react with coolant or metal powder, maintaining processing stability.

White Corundum for Refractory

White fused aluminum (WFA) is a key raw material made from high-quality alumina powder melted at high temperatures in an electric arc furnace, then crystallized and purified. In the refractory industry, it is commonly used in critical applications such as high-alumina bricks, castables, sintering materials, and high-temperature structural components. Its key advantages include high purity, high refractoriness, and low chemical reactivity, making it suitable for furnace lining systems requiring high-temperature strength and corrosion resistance.

As a leading manufacturer, we produce high-quality white fused aluminum oxide with an aluminum content exceeding 99%. This results in superior refractoriness and high-temperature resistance, typically maintaining temperatures above 2050°C, making it suitable for ultra-high-temperature operating environments. Furthermore, the customized white fused alumina we produce for wholesale customers maintains extremely low impurities, whether used in refractory applications or other applications. This ensures excellent chemical stability, enhanced slag corrosion resistance, and improved product life. Furthermore, the unique morphology of dense crystals and horny grains provides high mechanical strength and wear resistance. With a Mohs hardness of approximately 9.0 and a density of approximately 3.95–3.98 g/cm³, the product offers enhanced mechanical engagement and compressive strength in castables or bricks. Finally, controlled particle size and grading are crucial to optimize bulk density and construction performance, resulting in a variety of particle sizes, including micro powder, fine sand, medium sand, and coarse sand, ultimately enhancing product performance.

How is white fused alumina produced?

Product consistency and batch traceability:

Sample QC reports, batch analysis sheets, and particle size data are publicly available.

Strong bulk supply capabilities and stable delivery schedules: Monthly production capacity, on-hand inventory, and the ability to sign long-term supply agreements are available.
Customization and service:

We offer uniform particle size grading, surface modification, or premixes based on formulation requirements; we also provide technical support and formulation recommendations.