White corundum is a high-purity abrasive material made from premium aluminum oxide powder. It is produced through an electro-melting and refining process, resulting in a product with excellent self-sharpening properties, strong resistance to acid and alkali corrosion, high heat resistance, and stable thermal performance. With a hardness slightly higher than brown corundum but lower toughness, white corundum offers superior grinding efficiency, low heat generation, and long-lasting durability. It is ideal for grinding materials like high-carbon steel, high-speed steel, and stainless steel, especially when fine-grained abrasives are required.
White corundum is also widely used in precision casting and advanced refractory applications. Available in various particle sizes such as 0-1mm, 1-3mm, 3-5mm, 5-8mm, and 8-12mm, it meets strict physical and chemical standards, including Al₂O₃ content of over 99%, Na₂O below 0.5%, CaO under 0.4%, and magnetic impurities less than 0.003%. For finer applications, white corundum fine powders like 180#-0, 200#-0, and 320#-0 are available, with Al₂O₃ content above 98.5% and similar impurity limits.
As one of the most cost-effective abrasives for both dry and wet processes, white corundum excels in finishing rough surfaces where a finer finish is needed. Its sharp, angular structure ranks second only to diamond in hardness and is preferred in applications where iron contamination must be avoided. It can cut extremely hard materials or be used for precise machining to achieve ultra-low surface roughness. The high density and angular shape contribute to its fast cutting performance.
White corundum is manufactured by melting high-quality alumina (aluminum oxide) in an electric arc furnace at temperatures exceeding 2000°C, followed by cooling, crushing, shaping, magnetic separation, and sieving into different particle sizes. The resulting grains have a dense texture, sharp edges, and high hardness, making them suitable for ceramic production, resin-bonded abrasives, grinding, polishing, sandblasting, and precision casting. It is also used in advanced refractory materials.
The international standard code "WA" ensures consistency with global and national specifications. Most products are exported, while some are supplied domestically. Particle sizes are available according to international and national standards, and custom sizes can be processed upon request. Common sizes range from F4 to F320, with chemical composition varying slightly depending on the grade.
One of its key features is small crystal size and high impact resistance. When broken by a self-grinding machine, the particles tend to form spherical shapes, making them easy to bind with adhesives and suitable for various applications. White corundum is commonly used in industries such as aerospace, automotive, foundry, and semiconductor manufacturing. It is applied in surface treatments like plating, painting, glazing, and pre-treatment of PTFE, as well as in deburring, descaling, mold cleaning, and metal blasting. It is also used for dry and wet grinding, optical refraction, mineral and metal grinding, glass engraving, and as a paint additive.
For proper use, white corundum should be employed in dry or wet blasting systems using compressed air. Due to its high hardness, it wears quickly on low-quality equipment. It is recommended to avoid tungsten carbide spray guns and instead use boron or silicon carbide nozzles to ensure optimal performance.
This versatile abrasive material continues to play a vital role in modern industrial applications, offering efficiency, durability, and precision. Whether for large-scale manufacturing or specialized tasks, white corundum remains a top choice for professionals worldwide.
Foyer Light
Foyer Light is a type of lighting fixture used for decorating and illuminating entrance halls. It is typically installed on the ceiling and can be in the form of a chandelier, Semi-flush Mount, Wall Sconce, or ceiling fan light. The design of Foyer Light is often elaborate, and can be made of materials such as crystal, glass, metal, and can feature intricate patterns and decorations. It not only provides ample lighting, but also adds a touch of elegance and sophistication to the entrance hall.
The specific choice of Foyer Light also depends on the type of decoration effect suitable for various lamps and lanterns. However, it is generally necessary to meet the effect of the atmosphere and grade, and the current modern and simple Foyer Light is more popular, and the Lighting Fixture material is generally made of metal, stainless steel or acrylic. The installation method can be installed by ceiling or hanging wire, and the selection of lamps and lanterns should also be comprehensively considered from the later maintenance and management methods.
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