High alumina fine powder is a refractory material mainly made of bauxite and calcined at high temperature.
Its main component is alumina, which usually contains a certain proportion of impurities such as iron oxide and titanium dioxide, and is widely used in the production of refractory materials.
(1) High mechanical strength
(2) Good resistance to wear, strong compression and bending resistance
(3) Excellent chemical stability and good corrosion resistance
(4) Good thermal stability and superior high temperature resistance
(5) Low thermal conductivity, minimal heat loss, and high energy utilization efficiency
(6) Good durability and long service life
(1) Refractory products: can be used to prepare refractory bricks, castables, lightweight refractory materials, bonded clay bricks, etc.
(2) Steel industry: the inner walls, insulation layers, furnace throats, kiln doors, feeding ports, exhaust ports, etc. of smelting equipment such as steel furnaces, converters, and electric arc furnaces.
(3) Metallurgical industry: Bauxite is used to manufacture high-temperature furnace linings, furnace liners, and casting sand.
(4) Chemical industry: lining of high-temperature reactors, catalyst carriers, and lining of various corrosion-resistant equipment.
|
Grade |
Content（%） |
Refractoriness（℃） |
Volume Density（g/cm3） |
||
|
Al2O3 |
CaO |
Fe2O3 |
|||
|
Special Grade |
≥85 |
≤0.60 |
≤1.40 |
≥1790 |
≥3.60 |
|
Grade-80 |
≥80 |
≤0.60 |
≤3.00 |
≥1790 |
≥3.00 |
|
Grade-70 |
70~80 |
≤0.80 |
≤3.00 |
≥1790 |
≥2.80 |
|
Grade-60 |
60~70 |
≤0.80 |
≤3.00 |
≥1790 |
≥2.65 |
|
Grade-50 |
50~60 |
≤0.80 |
≤2.50 |
≥1790 |
≥2.55 |
Highland Refractory classifies High alumina fine powder based on alumina (Al₂O₃) content and particle fineness to meet precise industrial formulation needs, including Standard High Alumina Fine Powder (Al₂O₃: 70-85%, particle size 325-500 mesh, suitable for refractory castables and ceramic glazes), High-Purity High Alumina Fine Powder (Al₂O₃: ≥85%, particle size 800-1000 mesh, ideal for advanced ceramics and electronic insulating materials), and Ultra-Fine High Alumina Fine Powder (Al₂O₃: ≥90%, particle size ≥2000 mesh, designed for high-precision refractory coatings and composite materials); each type is processed with strict impurity control, ensuring it aligns with the fine mixing and bonding requirements of high-end production processes.
Highland’s High alumina fine powder stands out in precision manufacturing with core strengths: it has ultra-fine and uniform particle size distribution, which enables thorough blending with other raw materials (such as binders or aggregates) to reduce voids in end products, enhancing structural density and mechanical strength; it maintains high thermal stability even at ultra-high temperatures (up to 1700℃), ensuring the long-term performance of materials like refractory linings or advanced ceramics; it also has low impurity levels (e.g., SiO₂ ≤2%, Fe₂O₃ ≤1%), preventing unwanted chemical reactions in high-temperature or high-precision scenarios—these advantages make High alumina fine powder a critical raw material for upgrading product quality in demanding industries.
High alumina fine powder is widely used across sectors that demand precision and high-temperature resistance: in the refractory industry, it is a key component in low-cement castables and refractory coatings, improving the castables’ flowability and bonding strength for complex furnace parts; in the advanced ceramic industry, it is mixed into ceramic bodies to enhance hardness, wear resistance, and thermal shock resistance, suitable for making high-performance ceramic valves and electronic substrates; in the metallurgical industry, it is used as a refining agent to purify molten metals and improve alloy quality; in the electronics industry, ultra-fine High alumina fine powder is processed into insulating pastes for semiconductor components—each application leverages its fine particle properties to meet strict performance standards.
High alumina fine powder (Highland) excels in precision and fineness, with ultra-small particle sizes (usually ≥325 mesh) that enable thorough dispersion and tight bonding in high-end formulations, making it ideal for scenarios like advanced ceramics, high-precision castables, and electronic materials where uniformity and detail are critical; High Alumina Powder, by contrast, has larger particle sizes (typically 100-200 mesh) and is more focused on providing basic high-temperature resistance as a raw material for general refractories or ceramic mixes, offering cost-effectiveness and versatility for bulk production. Each product serves distinct needs: High alumina fine powder dominates high-precision, high-performance applications, while High Alumina Powder leads in general-purpose, bulk high-temperature material manufacturing.
Highland Refractory is a trusted producer of high-quality High alumina fine powder, backed by 30+ years of refractory raw material expertise—we source high-purity bauxite ore, use advanced ultra-fine grinding and classification technologies to control particle size (from 325 mesh to 5000 mesh) and ensure uniformity, and implement strict quality testing (measuring alumina content, particle distribution, and impurity levels for every batch), ensuring each High alumina fine powder meets global industrial standards. We hold ISO 9001/CE certifications, maintain an annual production capacity of 60,000 tons (covering various refractory powders), and serve 1,500+ clients across Asia, Africa, Europe, and Australia, making us a reliable partner for High alumina fine powder needs.
Choosing Highland Refractory for your High alumina fine powder requirements means accessing tailored solutions and comprehensive support: we offer customization (adjusting alumina content and particle fineness of High alumina fine powder to match your production process—e.g., 1000-mesh for advanced ceramics or 325-mesh for refractory castables), fast delivery (3–7 days for standard grades in stock, 10–15 days for customized ultra-fine grades), and bulk discounts (5–10% off orders ≥ 5 tons). We also provide free samples, detailed quality inspection reports, and 24/7 technical guidance (advising on powder dispersion and formulation optimization), ensuring your High alumina fine powder integrates seamlessly into high-precision production and enhances the performance of your end products.
A: Yes, we do offer free samples of our standard High alumina fine powder. You only need to cover the shipping cost to your address. If you want samples of customized High alumina fine powder with specific alumina content or particle fineness, a small fee may apply, but it will be refunded if you place a large order later.
A: For our standard High alumina fine powder in stock, you can expect delivery within 3 - 7 days. If you've ordered customized High alumina fine powder with particular specifications, it'll take 10 - 15 days as we'll need extra time for production and quality checks. For large - scale bulk orders, we'll work with you to determine a suitable delivery schedule.
A: High alumina fine powder is carefully packaged to protect it during transit. It's first sealed in high - quality moisture - proof bags to prevent moisture absorption. Then, these bags are placed in sturdy cardboard or steel drums depending on the quantity. The drums are clearly labeled with handling instructions such as "Keep Dry" and "Handle with Care".
A: We accept T/T (Telegraphic Transfer) and PayPal for payments. Similar to our other products, we require full payment before dispatching the High alumina fine powder. We're constantly exploring additional payment options to make it more convenient for our customers.
A: Absolutely. Every batch of High alumina fine powder we produce undergoes strict quality control. You'll receive a detailed quality inspection report that includes information about its alumina content, particle size distribution, and impurity levels. This will give you confidence in the quality of the powder you're purchasing.
A: We're sorry if you receive damaged High alumina fine powder. Please contact our customer service right away and provide details and photos of the damage. We'll arrange to replace the damaged High alumina fine powder with a new, undamaged batch at no extra cost to you.
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