White Fused Alumina is a white man-made corundum that, like natural corundum gemstones, has high hardness, ketahanan suhu tinggi, chemical stability and purity. Dengan kekerasan mohs 9, second only to diamond, a maximum use temperature close to 2000°C, and an Al2O3 content greater than 99%, these excellent material properties make White Fused Alumina more and more widely used in industrial production today.
Alumina yang menyatu putih is made from industrial alumina powder, yang dilebur dalam tungku busur listrik pada suhu lebih dari 2000°C dan didinginkan serta dikristalkan untuk memperoleh frit Alumina Fused Putih.
White Fused Alumina dan bubuk alumina industri juga mengandung alumina, so why do we need to do this extra work for smelting?
Hal ini karena banyak karakteristik unggulan White Fused Alumina yang berasal dari kristal α-Al2O3-nya, sedangkan kandungan alumina bubuk alumina industri hanya sekitar 98%, yang tidak hanya mengandung kotoran lainnya, tetapi juga mengandung isomer Al2O3, yang secara signifikan dapat mengurangi berbagai sifat bahan korundum. Karena itu, perlu untuk menghilangkan kotoran dengan cara melelehkannya, memurnikan kandungan alumina, dan membentuk kristal α-Al2O3 melalui kristalisasi ulang.
Main Properties
| Milik | Practical Significance |
| Kekerasan tinggi | Supports grinding, blasting, lapping and wear-resistant applications. |
| Low iron content | Reduces the risk of iron contamination and dark discoloration. |
| Angular grain shape | Provides cutting edges for material removal and surface preparation. |
| Stabilitas termal | Supports selected refractory and high-temperature applications. |
| Stabilitas kimia | Provides resistance in many industrial environments. |
| Wide grit range | Allows selection from coarse blasting grains to fine polishing powders. |
Exact chemical composition, kepadatan massal, magnetic content and particle size distribution vary by grade. Insert verified values from the current product specification rather than publishing generic numbers.
Classification of White Fused Alumina
The melting and cooling process results in several tons of corundum lumps, which cannot be used directly in industrial production, so they need to be processed and crushed into different sizes to suit various applications.
The classification of White Fused Alumina according to particle size mainly includes:
- Pasir segmental Alumina Fused Putih (White Fused Alumina sand within two particle sizes).
- Pasir ukuran partikel White Fused Alumina (corresponding to the standard requirements of the model).
- Serbuk halus Alumina Fused Putih (fine segmental sand that completely passes through a certain screen).
- Bubuk mikro Alumina Fused Putih (superfine powder with a general particle size of less than 60 microns).
White Fused Alumina segment sand
Pasir segmental Alumina Fused Putih: it is White Fused Alumina product with particle size range of 0-1mm, 1-3mm, 3-5mm, 5-8mm, 100#-0, 200#-0, 320#-0, dll.. It is transported from the smelting workshop to the section sand production workshop with high quality White Fused Alumina boulders, crushed by the coarse breaker and then sieved to finally get White Fused Alumina products with particle size in a certain range. Hal ini terutama digunakan sebagai bahan tahan api berbentuk, bahan tahan api tak berbentuk dan pasir lantai.
Serbuk halus Alumina Fused Putih
Serbuk halus Alumina Fused Putih: Itu milik pasir bagian White Fused Alumina, produk dari 0 sampai ukuran partikel tertentu pada bagian pasir disebut juga serbuk halus, ini adalah produk yang lolos saringan terbaik di lini produksi pasir bagian White Fused Alumina, model umumnya adalah: 100#-0, 200#-0, 320#-0, 0-1mm, it can be used as high quality refractory powder for shaped refractories and unshaped refractories. Also White Fused Alumina fine powder can be further ground, processed and sieved into White Fused Alumina number sand and White Fused Alumina micro powder.
Pasir ukuran partikel White Fused Alumina
Pasir ukuran partikel White Fused Alumina, also called White Fused Alumina number sand, terutama dibagi menjadi pasir White Fused Alumina F dan pasir White Fused Alumina P dan nomor W bubuk mikronisasi standar nasional. It is a certain type of White Fused Alumina sand corresponding to the standard particle size distribution of F sand and P sand. Mainly contains
White Fused Alumina F sand: F4, F5, F6, F7, F8, F10, F12, F14, F16, F20, F22, F24, F30, F36, F40, F46, F54, F60, F70, F80, F90, F100, F120, F150, F180, F220, F230, F240, F280, F320, F360、F400、F500、F600、F800、F1000、F1200
White Fused Alumina P sand: p240, p280, p320, p360, p400, p500, p600, p800, p1000, p1200, p1500, p2000, p2500
Bubuk mikro Alumina Fused Putih
Bubuk mikronisasi White Fused Alumina dipilih dari bubuk halus White Fused Alumina berkualitas tinggi di lini produksi pasir bagian White Fused Alumina, selanjutnya dihancurkan dan dibentuk oleh pabrik tabung, pemisahan magnetik untuk menghilangkan besi, pencucian asam dan kelembapan. It is widely used in grinding and polishing of semiconductors, crystals, circuit boards, aluminium, steel, stainless steel, batu, kaca, dll.. as well as coatings, fillers, dll..
Size specification and composition
Japanese standard: 240#, 280#, 320#, 360#, 400#, 500#, 600#, 700#, 800#, 1000#, 1200#, 1500#, 2000#, 2500#, 3000#, 3500#, 4000#, 6000#, 8000#
European Standard: F240, F280, F320, F360, F400, F500, F600, F800, F1000, F1200, F1500
National standard: W63, W50, W40, W28, W20, W14, W10, W7, W5, W3.5
White Fused Alumina need to pay attention to the following points
Alumina content: Alumina content directly determines the nature of White Fused Alumina and the cost of the plant.
Sodium content: sodium oxide will produce high sodium aluminate in White Fused Alumina smelting, which affects the product quality.
Kepadatan massal: Bulk density can reflect particle density, particle shape and particle size composition to a certain extent.
Whiteness: the index of reflecting the appearance and color of White Fused Alumina.
Distribusi ukuran partikel: too coarse or too fine particles will have different effects.
Bentuk partikel: Different applications use sharp or rounded or flat particle shapes.
Applications in the white corundum industry
- Polishing and Grinding
- Bahan tahan api
- Sandblasting
- Precision Casting
- Coated Abrasives
- Curing Abrasives
White corundum life applications
- White grinding wheel, gauze
- White sharpening stone
- Wear layer of laminate wood flooring
- Sanding and polishing wax
- Sapphire screen
- Artificial corundum stones
- Sandblasting of porcelain teeth
White Fused Alumina vs Other Abrasives
| Feature | Alumina yang menyatu putih | Alumina menyatu coklat | Silikon karbida |
| Primary composition | Aluminium oksida | Aluminum oxide with more impurities | Silikon karbida |
| General character | Hard, clean and relatively friable | Tough and economical | Very hard, sharp and relatively brittle |
| Iron contamination risk | Generally low | Higher than white fused alumina | Generally low, subject to grade |
| Common use | Penggilingan presisi, blasting, tahan panas | General grinding and blasting | Hard/brittle materials and rapid cutting |
| Selection factor | Clean finish and controlled cutting | Toughness and cost | Sharp cutting and material compatibility |
Pertanyaan yang Sering Diajukan
Is white fused alumina the same as white corundum?
Ya. White corundum and white aluminum oxide are common alternative names for white fused alumina.
Is white fused alumina harder than brown fused alumina?
Both are hard aluminum oxide abrasives. White fused alumina is generally cleaner and more friable, while brown fused alumina is often selected for toughness and economy. Performance depends on the grade and application.
Can white fused alumina be used on stainless steel?
It is often used where low iron contamination is important, including stainless steel processing. The blasting system and recycled media must also be protected from contamination.
Which grit size should I choose?
Coarse grits create faster removal and a rougher profile. Fine grits produce a smoother finish. The correct size depends on the workpiece, process pressure, equipment and target surface.
Can it be used in refractory materials?
Ya. White fused alumina is used in selected refractory formulations, but chemistry, grain sizing and service conditions must be reviewed.
White fused alumina manufacturer
Henan Superior Abrasives is a manufacturer in China that provide concrete additive, abrasives, our main product include densified silica fume, undensified silica fume, silikon karbida hitam, silikon karbida hijau, alumina leburan putih, brown fused alumina etc.
If you are interested in our products, please leave a message or contact us through the contact information below.
E-mail: Sales@superior-abrasives.com
Whatsapp: +86-15981847002
