Xintai Refractory supplies high-quality AZS-33 Fused Cast Refractory Bricks designed for glass melting furnaces and other high-temperature applications requiring excellent corrosion resistance and thermal stability. AZS-33 bricks are manufactured through an advanced electrofusion casting process using high-purity alumina powder and zircon raw materials, forming a dense microstructure composed of corundum crystals, zirconia crystals, and a controlled glass phase.
With approximately 33% zirconia content, AZS-33 fused cast refractory bricks offer outstanding resistance against molten glass corrosion, alkali attack, and high-temperature erosion. Their low porosity, high density, and low glass phase exudation characteristics help reduce glass defects such as blistering and contamination, ensuring long service life in severe furnace environments.
AZS-33 bricks are widely used in glass contact areas, including sidewalls, paving blocks, and other furnace zones directly exposed to molten glass. They are also suitable for superstructure applications such as breast walls, ports, and tuck stones where reliable thermal performance is required.
Technical Specifications
| Item | AZS-33 |
|---|---|
| ZrO₂, % | 33 |
| Al₂O₃, % | 49.8 |
| SiO₂, % | 15.5 |
| Na₂O, % | 1.4 |
| Corundum Phase, % | 47 |
| Baddeleyite Phase, % | 32 |
| Vitreous Phase, % | 21 |
| Bulk Density, g/cm³ | 3.7 |
| Apparent Porosity, % | ≤1.5 |
| Cold Crushing Strength, MPa | ≥350 |
| Linear Change Under Load | 0 |
| Refractoriness Under Load (0.2 MPa) | ≥1700℃ |
| Initial Exudation Temperature | 1400℃ |
| Static Corrosion Rate of Molten Glass | ≤1.45 mm/24h |
| Bubble Release Rate | ≤1.4% |
Key Features
- Excellent Molten Glass Corrosion Resistance: AZS-33 fused cast refractory bricks have excellent resistance to erosion from molten glass, acidic and alkaline substances, making them ideal for direct contact areas inside glass melting furnaces.
- Dense Structure and Low Porosity: The fused cast manufacturing process creates a compact crystal structure with low apparent porosity, reducing penetration of molten glass and furnace gases.
- Low Glass Contamination: The controlled glass phase content helps minimize blistering and exudation, improving glass quality and reducing defects during production.
- High Mechanical Strength: With high cold crushing strength and excellent structural stability, AZS-33 bricks can withstand mechanical stress and long-term operation under high temperatures.
- Good Thermal Stability: The material maintains reliable performance under continuous high-temperature operation when properly installed and heated according to recommended procedures.
- Customized Manufacturing: Xintai provides customized AZS-33 brick sizes, shapes, and pre-assembled solutions according to different glass furnace designs and installation requirements.
Typical Applications
AZS-33 Fused Cast Refractory Bricks are commonly used in:
- Glass melting furnace tank blocks
- Glass furnace sidewalls and paving blocks
- Molten glass contact areas
- Furnace throats and channels
- Glass furnace ports and breast walls
- Tuck stones and other superstructure components
- Float glass production lines
- Container glass and daily-use glass furnaces
- Specialty glass manufacturing equipment
Production Details
Xintai AZS-33 fused cast refractory bricks are manufactured using advanced electrofusion casting technology. During production, carefully selected alumina and zircon raw materials are melted at high temperatures and cast into precision molds to achieve a uniform crystal structure.
The production process includes:
- High-temperature electrofusion melting
- Precision casting and controlled cooling
- Crystal structure optimization
- Dimensional inspection
- Bulk density and porosity testing
- Corrosion resistance evaluation
- Quality inspection before shipment
Through strict manufacturing control, each AZS-33 brick provides stable chemical composition, excellent dimensional accuracy, and reliable furnace performance.
Packing and Shipping Details
Xintai uses professional packaging methods to ensure safe transportation of AZS-33 Fused Cast Refractory Bricks.
Packing includes:
- Strong wooden cases for external protection
- Foam boards between individual bricks
- Corner protection with reinforced materials
- Plastic film wrapping for moisture protection
- Steel band reinforcement for secure transportation
Each package includes detailed product labels and packing lists for easy identification during installation. Every batch is inspected before shipment to ensure compliance with customer requirements.
Xintai provides global delivery services with reliable logistics solutions and timely shipment schedules.
Frequently Asked Questions (FAQ)
Q1: What is AZS-33 fused cast refractory brick?
AZS-33 is a fused cast alumina-zirconia-silica refractory brick containing approximately 33% zirconia. It is widely used in glass furnaces because of its excellent resistance to molten glass corrosion and high-temperature erosion.
Q2: What is the difference between AZS-33, AZS-36, and AZS-41 bricks?
The main difference is zirconia content. AZS-33 contains about 33% ZrO₂, AZS-36 contains about 36%, and AZS-41 contains about 41%. Higher zirconia content generally provides stronger corrosion resistance and lower glass contamination.
Q3. Where are AZS-33 bricks mainly used?
AZS-33 bricks are mainly used in glass melting furnaces, especially molten glass contact areas such as sidewalls, tank bottoms, paving blocks, channels, and other high-temperature zones.
Q4: Can Xintai provide customized AZS-33 brick sizes?
Yes. Xintai provides customized dimensions, shapes, and pre-assembled refractory solutions according to furnace drawings and customer requirements.
Q5: What is the service life of AZS-33 fused cast bricks?
The service life depends on furnace design, operating temperature, glass composition, and installation quality. Properly installed AZS-33 bricks can provide long-term stable performance in demanding glass furnace environments.
