LC 45 Refractory Castable is a 45% alumina low cement refractory castable designed for medium-temperature industrial furnace linings where cost-effective, reliable performance is required.
It is formulated with high-quality alumina aggregates, reactive alumina micro-powders, and low CaO calcium aluminate cement, offering good mechanical strength, volume stability, and thermal shock resistance at temperatures up to 1450°C.
LC 45 Castable provides excellent workability and easy installation for various industrial applications while maintaining low permanent linear change and low porosity after firing.
Technical Specifications
| Item | Unit | LC 45 Castable |
|---|---|---|
| Al₂O₃ Content | % | ≥ 45 |
| SiO₂ Content | % | ≥ 50 |
| CaO Content | % | ≤ 2.1 |
| Bulk Density | g/cm³ | ≥ 2.3 |
| Compressive Strength (110°C × 3h) | MPa | ≥ 40 |
| Compressive Strength (1500°C × 3h) | MPa | ≥ 60 |
| Flexural Strength (110°C × 3h) | MPa | ≥ 6 |
| Flexural Strength (1500°C × 3h) | MPa | ≥ 8 |
| Permanent Linear Change (1500°C × 3h) | % | ±0.2 |
| Maximum Service Temperature | °C | 1450 |
| Water Addition | % | 6.0 – 6.5 |
Key Features
Medium alumina content (~45% Al₂O₃) for cost-effective high-temperature performance
Low cement and low CaO content to reduce slag penetration and improve thermal stability
Good cold and hot crushing strength for reliable structural support
Low permanent linear change for high volume stability
Low porosity with good density for improved wear resistance
Excellent workability and vibration casting performance
Suitable for service temperatures up to 1450°C
Typical Applications
LC 45 Refractory Castable is widely used in medium-temperature industrial applications, including:
Steel industry: furnace walls, roofs, and ladle insulation
Cement industry: preheaters, calciners, and duct linings
Non-ferrous metallurgy: holding and melting furnaces
Chemical and petrochemical reactors
Industrial kilns and thermal processing units
Production Details
Raw materials: High-grade alumina aggregates, reactive alumina, low-CaO cement, and selected additives
Manufacturing process: Accurate batching, intensive mixing, and strict quality control at each stage
Quality control: Chemical analysis, physical testing, and high-temperature performance verification
Proper curing and controlled drying are essential to achieve optimal performance and long service life.
Packing and Shipping Details
Standard packing: 25 kg paper bags with moisture-proof inner lining
Bulk packing: Jumbo bags available upon request
Palletizing: Wooden pallets with shrink wrapping for enhanced protection
Shipping methods: By sea, by truck, or by rail
Delivery form: Dry powder, ready for on-site mixing
All products are securely packed to prevent moisture absorption and damage during transportation.
Frequently Asked Questions (FAQ)
Q1: What is the alumina content of LC 45 Castable?
LC 45 Castable contains approximately 45% Al₂O₃, making it suitable for medium-temperature applications.
Q2: What is the maximum service temperature?
LC 45 Castable can be used continuously up to 1450°C.
Q3. How much water is needed for mixing?
The recommended water addition is 6.0 – 6.5% depending on the application.
Q4: Can LC 45 Castable resist abrasion?
Yes, its low porosity and dense microstructure provide reasonable wear resistance for medium-temperature furnaces.
Q5: What curing and drying procedures are required?
After installation, proper curing at ambient temperature is required, followed by controlled drying and heating according to a recommended heating schedule.
