Products
Fused Cast AZS Brick
• ZrO₂ Content: ≥32.5–40.5%
• Al₂O₃ Content: ≥45–50%
• Bulk Density: ≥3.75–4.00 g/cm³
• Apparent Porosity: ≤1.0–1.2%
• Cold Crushing Strength: ≥200 MPa
• Function: Glass Corrosion Resistance & High Density & Low Porosity & High-Temperature Stability
Product Introduction
Fused Cast AZS Brick is a high-density refractory product made from alumina, zirconia and silica raw materials through electric arc melting, casting, annealing and precision processing.
AZS refers to the three main chemical components:
- A: Al₂O₃
- Z: ZrO₂
- S: SiO₂
During production, the raw materials are completely melted at high temperature and poured into specially designed molds. The cast blocks are then slowly annealed to reduce internal stress and obtain a dense refractory structure.
Fused Cast AZS Brick has very low apparent porosity, high mechanical strength and strong resistance to molten glass corrosion. It also has a low tendency to generate stones, bubbles and glass-phase contamination when correctly selected and installed.
Three common grades are available: AZS33, AZS36 and AZS41. The grade number approximately represents the zirconia content. A higher zirconia content generally provides improved resistance to molten glass corrosion in severe glass furnace areas.
Feature:
- High zirconia content.
- High bulk density.
- Very low apparent porosity.
- High cold crushing strength.
- Strong resistance to molten glass corrosion.
- Good resistance to glass penetration.
- Good high-temperature volume stability.
- High glass-phase exudation temperature.
- Low bubble generation tendency.
- Low stone and defect generation tendency.
- Good resistance to hot glass flow.
- Suitable for severe glass furnace working areas.
- Standard and special shapes available.
- Different casting methods available.
Application:
Fused Cast AZS Brick is mainly used as a working lining in glass melting furnaces and other equipment exposed to molten glass corrosion.
Typical applications include:
- Glass furnace sidewalls
- Melting pool sidewalls
- Refining zone sidewalls
- Furnace paving blocks
- Tank bottoms
- Doghouse walls and crowns
- Feeder channels
- Forehearth channels
- Furnace throats
- Dam blocks
- Electric boosting areas
- Electrode block corners
- C-shaped blocks
- Frit kilns
- Special glass melting equipment
AZS33 is commonly used for furnace superstructures, working-pool sidewalls, paving blocks, feeder channels, tank bottoms, C-shaped blocks and doghouse crown areas.
AZS36 is generally selected for sidewalls, doghouses, throats, bottom areas, dam blocks and electric boosting areas requiring stronger corrosion resistance.
AZS41 has the highest zirconia content in the standard range and is mainly selected for severe molten-glass contact areas, including sidewalls, doghouses, dam blocks, tank-bottom areas and electric block corners.
The final grade and casting method should be selected according to glass composition, furnace temperature, glass flow, installation position and expected furnace campaign life.
Technical Data:
| Item | Fused Cast AZS Brick | |||
| Index | RS-AZS33 | RS-AZS36 | RS-AZS41 | |
| Chemical Composition% | Al2O3 | ≥50.00 | ≥49.00 | ≥45.00 |
| ZrO2 | ≥32.50 | ≥35.50 | ≥40.50 | |
| SiO2 | ≤15.00 | ≤13.50 | ≤12.50 | |
| Na2O+K2O | ≤1.30 | ≤1.35 | ≤1.30 | |
| Volume density g/cm3 | ≥3.75 | ≥3.85 | ≥4.00 | |
| Apparent Porosity % | ≤1.2 | ≤1.0 | ≤1.2 | |
| Cold Crushing Strength Mpa | ≥200 | ≥200 | ≥200 | |
| Exudation Temperature of Glass Phase | ≥1400 | ≥1400 | ≥1410 | |
| Bubble Separation Ratio（1300℃×10h） | ≤1.2 | ≤1.0 | ≤1.0 | |
| Anti-corrosion rate of glass liquid 1500℃×36h （mm/24h）% | ≤1.4 | ≤1.3 | ≤1.2 | |
| Bulk density（g/cm3） | Ordinary casting PT(RN RC N) | ≥3.55 | ≥3.55 | ≥3.70 |
| No shrinking casting ZWS(RR EVF EC ENC) | ≥3.65 | ≥3.75 | ≥3.85 | |
| Tilt casting QX(RO) | ≥3.65 | ≥3.75 | ≥3.90 | |
| No shrinkage castingWS( RT VF EPIC FVP DCL) | ≥3.75 | ≥3.80 | ≥3.95 | |
The technical values above are based on the reference manufacturer’s published AZS33, AZS36 and AZS41 technical table.
The values are typical reference data. Final specifications may vary according to raw material purity, melting process, casting method, annealing process, block size and testing standards.
Before publishing the table as Jiuhua product data, confirm the values against your own technical data sheet or laboratory report.
