Products
Mullite Castable
• Al₂O₃ Content: ≥55–70%
• Bulk Density: ≥2.2–2.5 g/cm³
• Maximum Service Temperature: 1450–1600°C
• Flexural Strength: ≥7–9 MPa
• Compressive Strength: ≥30–45 MPa
• Function: High Strength & Thermal Shock Resistance & Erosion Resistance & Monolithic Lining
Product Introduction
Mullite Castable is an unshaped refractory material made from selected mullite aggregates, high-alumina refractory powder, binders and performance-enhancing additives.
After adding the recommended amount of clean water and mixing evenly, the material can be poured into formwork and compacted by vibration to form a strong monolithic refractory lining.
Mullite Castable provides high mechanical strength, good volume stability and excellent thermal shock resistance. It also offers good resistance to erosion, gas scouring and mechanical abrasion during high-temperature operation.
The material can be used as a furnace working lining in direct contact with flame. Different grades are available with alumina contents ranging from 55% to 70% and maximum service temperatures ranging from 1450°C to 1600°C.
Features
- High mechanical strength.
- Good high-temperature volume stability.
- Excellent thermal shock resistance.
- Good resistance to flame and hot gas.
- Good erosion resistance.
- Good scouring resistance.
- Good abrasion resistance.
- Low permanent linear change.
- Strong monolithic lining structure.
- Fewer joints than refractory brick linings.
- Suitable for complex furnace structures.
- Good construction performance.
Applications
Mullite Castable is mainly used as a working lining or monolithic refractory lining in industrial furnaces and high-temperature equipment.
Typical applications include:
Typical applications include:
- Petrochemical tubular heating furnaces
- Light diesel cracking furnaces
- Ethane cracking furnaces
- Atmospheric and vacuum furnaces
- Sulfur recovery units
- Steam boilers
- Industrial furnace walls
- Industrial furnace roofs
- Furnace doors
- Observation hole linings
- Burner areas
- High-temperature pipeline linings
- Heat-resistant equipment linings
- Other industrial furnace working linings
Mullite Castable is suitable for furnace areas exposed to flame, hot gas, erosion and temperature fluctuations. The appropriate product grade should be selected according to operating temperature, furnace atmosphere, mechanical load and abrasion conditions.
Technical Data:
| Product Grade | JHMJ55 | JHMJ60 | JHMJ65 | JHMJ70 |
| Al2O3 content, % ≥ | 55 | 60 | 65 | 70 |
| Bulk density, g/cm3 ≥ | 2.2 | 2.3 | 2.4 | 2.5 |
| Flexural strength, MPa ≥ | 7 | 7 | 8 | 9 |
| Compressive strength, MPa ≥ | 30 | 35 | 40 | 45 |
| Linear variation(%) ≤ | ±0.5 | ±0.5 | ±0.5 | ±0.5 |
| Maximum use temperature, ℃ | 1450 | 1500 | 1550 | 1600 |
The technical data above are typical reference values. Final specifications may vary according to raw materials, aggregate grading, binder content, water addition, curing conditions and testing methods.