White Fused Alumina for Refractories
1. High purity and stable performance Al₂O₃ ≥99.0%, with very low impurities (Fe₂O₃≤0.05%, Na₂O≤0.30%), ensures stable refractory performance. 2. High refractoriness and temperature resistance Refractoriness ≥1850℃ and a maximum service temperature up to 1900℃ suit various indust...
Read the full description- Color
- White
- Mesh size
- 200#-0, 325#-0
- Bulk density
- ≥3.50 g/cm³
- True density
- ≥3.95 g/cm³
Bodan supplies this item to specification. Share the material, machine and required finish and we will confirm the grade, dimensions and packing for your order.
Advantages
Key features
-
High purity and stable performance
Al₂O₃ ≥99.0%, with very low impurities (Fe₂O₃≤0.05%, Na₂O≤0.30%), ensures stable refractory performance.
-
High refractoriness and temperature resistance
Refractoriness ≥1850℃ and a maximum service temperature up to 1900℃ suit various industrial furnaces.
-
Good thermal shock resistance
Low linear expansion provides excellent thermal shock resistance and helps prevent cracking under rapid heating and cooling.
-
Strong chemical stability
Resists acid and alkali corrosion without reacting with them, supporting varied chemical environments.
-
High bulk density and low porosity
Production in a tilting electric arc furnace achieves bulk density ≥3.50 g/cm³ and low porosity, improving volume stability and thermal shock resistance.
-
Good particle shape and flowability
Rounded grains, a narrow and uniform size distribution, and clean, dry surfaces support bonding and easy forming.
Technical data
Specifications
- Color
- White
- Mesh size
- 200#-0, 325#-0
- Bulk density
- ≥3.50 g/cm³
- True density
- ≥3.95 g/cm³
- Melting point
- 2250℃
- Mohs hardness
- ≥9.0
- Particle size — Metric
- 0-1 mm, 1-3 mm, 3-5 mm, 5-8 mm, 8-12 mm
- Crystal system
- Trigonal crystal system
- Specifications — Metric
- 0-1 mm, 1-3 mm, 3-5 mm, 5-8 mm
- Specifications — Mesh size
- 200#-0, 325#-0
- Max service temperature
- 1900℃
Product details
About this product
Product Overview
White fused alumina (WFA) is a synthetic corundum made from quality industrial alumina powder by arc fusion above 2000℃. Its main crystalline phase is α-Al₂O₃ in the trigonal system, with a pure white color. High purity and hardness, acid and alkali resistance, temperature resistance and thermal stability make it suitable as aggregate and filler for premium refractories.
Available as sized aggregates of 0-1, 1-3, 3-5 and 5-8 mm, and fine powder of 200#-0. Other specifications can be customized.
Core Advantages
1. High purity and stable performance
Al₂O₃ ≥99.0%, with very low impurities (Fe₂O₃≤0.05%, Na₂O≤0.30%), ensures stable refractory performance.
2. High refractoriness and temperature resistance
Refractoriness ≥1850℃ and a maximum service temperature up to 1900℃ suit various industrial furnaces.
3. Good thermal shock resistance
Low linear expansion provides excellent thermal shock resistance and helps prevent cracking under rapid heating and cooling.
4. Strong chemical stability
Resists acid and alkali corrosion without reacting with them, supporting varied chemical environments.
5. High bulk density and low porosity
Production in a tilting electric arc furnace achieves bulk density ≥3.50 g/cm³ and low porosity, improving volume stability and thermal shock resistance.
6. Good particle shape and flowability
Rounded grains, a narrow and uniform size distribution, and clean, dry surfaces support bonding and easy forming.
Chemical Specifications
| Specification | Al2O3 | Fe2O3 | Na2O | TiO2 |
|---|---|---|---|---|
| 0-1mm | ≥99.0% | ≤0.05% | ≤0.30% | ≤0.15% |
| 1-3mm | ≥99.0% | ≤0.05% | ≤0.30% | ≤0.15% |
| 3-5mm | ≥99.0% | ≤0.05% | ≤0.30% | ≤0.15% |
| 5-8mm | ≥99.0% | ≤0.05% | ≤0.30% | ≤0.15% |
| 200#-0 | ≥99.0% | ≤0.05% | ≤0.30% | ≤0.15% |
| 325#-0 | ≥99.0% | ≤0.05% | ≤0.30% | ≤0.15% |
Physical Properties
| Item | Property |
|---|---|
| Color | White |
| Crystal form | Trigonal crystal system |
| Mohs hardness | ≥9.0 |
| Melting point | 2250℃ |
| Maximum service temperature | 1900℃ |
| True density | ≥3.95 g/cm³ |
| Bulk density | ≥3.50 g/cm³ |
Applications
Steelmaking: ladle and iron-runner castables, gunning mixes, purging plugs and monolithic lances
Refractory products: corundum bricks, corundum-mullite products, refractory fibers and lightweight insulating bricks
Monolithic refractories: castables, ramming mixes, plastic refractories, spray mixes and precast shapes
Industrial furnaces: high-temperature linings, cement kilns and petrochemical equipment
Precision casting: molding sand, lost-foam coatings and refractory coatings
Other applications: specialty ceramics, catalyst supports and polishing materials
Packaging
Packaging type / Specification / Applications
25 kg plastic woven bags / 25 kg per bag / Small orders and samples
Bulk bags / 1000 kg (1 ton) per bag / Large industrial orders
25 kg bags in a bulk bag / 40 × 25 kg bags per bulk bag / Flexible handling and efficient transport
Custom Packaging Service
Customized packaging can include:
Custom capacities, such as 1000 or 1250 kg bulk bags
Custom labels and branding
Special moisture- and contamination-resistant packaging
Use and Storage Recommendations
1. Combine sized aggregate and fine powder
In refractory castables, aggregate forms the structural skeleton and fine powder fills the matrix voids. Select a suitable grading according to the formulation.
2. Storage Conditions
Store in a dry, ventilated place away from moisture and corrosive substances such as acids and alkalis. Do not exceed the specified stacking height to prevent packaging damage.
3. Custom Services
Water washing, acid washing and other treatments are available to meet different purity requirements.
Frequently Asked Questions
How does white fused alumina differ from brown fused alumina?
White fused alumina has higher purity (Al₂O₃≥99%), a pure white color, slightly higher hardness and somewhat lower toughness. Brown fused alumina contains approximately 95% Al₂O₃ and is dark brown. White fused alumina is more suitable for high-purity refractories and precision casting.
What is the difference between white fused alumina aggregate and fine powder?
Sized aggregate, from 0-1 to 5-8 mm, forms the refractory skeleton; fine powder, 200#-0, fills the matrix. Combining them can optimize refractory density and performance.
Can the product be used in high-temperature steelmaking environments?
Yes. White fused alumina offers high refractoriness, a maximum service temperature of 1900℃ and good slag resistance. It is widely used in ladle and iron-runner castables.
Are custom specifications available?
Yes. Besides standard sizes, 8-12 mm aggregate, 325#-0 fine powder and other special sizes can be supplied.
What is the minimum order quantity?
Standard orders start from one 25 kg bag. Bulk bags are normally shipped as complete units.
Can packaging be customized?
Yes. Bulk bag capacities, label designs and special packaging formats can be customized.
Resources
Documents
Data sheets, test reports and packing details for this product are issued on request. Send an inquiry and our technical team will return the documents that match your application.
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White Fused Alumina for Refractories Pricing, lead time and packing for wholesale and OEM orders.