Wholesale Corundum Mullite Kiln Bricks are premium high alumina refractory bricks manufactured with corundum and mullite as the main crystalline phases. Using high-purity raw materials and carefully controlled firing processes at 1650–1750℃, these bricks deliver excellent high-temperature strength, creep resistance, and thermal shock resistance. With low apparent porosity and accurately controlled dimensions, corundum mullite bricks are widely applied in hot blast stoves, glass furnaces, ceramic kilns, and other high-temperature industrial equipment.
Technical Specifications
| Property | Unit | Value |
|---|---|---|
| Al₂O₃ Content | % | ≥ 80 – 90 |
| Apparent Porosity | % | ≤ 18 |
| Bulk Density | g/cm³ | 2.8 – 3.1 |
| Cold Crushing Strength | MPa | ≥ 70 – 90 |
| Refractoriness Under Load | °C | ≥ 1700 |
| Thermal Shock Resistance | Cycles | ≥ 20 |
Key Features
High Temperature Resistance: Withstands temperatures up to 1700℃ with strong structural integrity.
Excellent Creep Resistance: Maintains performance under long-term high-temperature stress.
Low Apparent Porosity: Reduces slag penetration and improves erosion resistance.
Strong Mechanical Strength: Cold crushing strength ≥100 MPa ensures durability in harsh environments.
Precision Manufacturing: Uniform size and smooth surfaces make installation easier and more efficient.
Typical Applications
Hot blast stoves in iron and steel industries
Glass furnaces (regenerator and combustion chambers)
Ceramic kilns and tunnel kilns
Non-ferrous smelting furnaces
High-temperature burners and industrial thermal equipment
Production Details
Raw Materials: High-purity corundum and mullite, with low iron content to ensure stability.
Process: Raw material selection → crushing & grading → mixing with binding agents → molding under hydraulic press → drying → high-temperature firing (1650–1750℃).
Quality Control: Each batch undergoes chemical analysis, density measurement, strength testing, and refractoriness verification to meet international standards.
Packing and Shipping Details
Packing: Bricks are packed in fumigation-free wooden pallets or wooden cases, wrapped with protective film and secured with steel straps.
Shipping: Suitable for sea freight in standard containers. Customized packaging and palletizing available upon request to ensure safe delivery.
Frequently Asked Questions (FAQ)
Q1: What makes corundum mullite bricks better than common high alumina bricks?
They have higher Al₂O₃ content (≥90%), better creep resistance, higher refractoriness under load, and lower porosity, which ensure longer furnace life.
Q2: Are these bricks suitable for direct contact with molten glass?
Yes, due to low porosity and excellent erosion resistance, they are commonly used in glass furnaces.
Q3. Can I order customized shapes and sizes?
Yes, in addition to standard sizes (230×114×65 mm), we provide custom shapes according to furnace design requirements.
Q4: How do you ensure quality during production?
Strict raw material control, high-pressure molding, precise firing technology, and multiple testing methods guarantee consistent quality.
Q5: What is the delivery time for bulk orders?
Normally 20–30 days after order confirmation, depending on quantity and customization.
