LC 80 Refractory Castables are 80% alumina low cement refractory castables from Xintai Refractory engineered for high-temperature industrial furnace linings where high strength, thermal stability, and abrasion resistance are required.
Formulated with selected high-purity alumina aggregates, reactive alumina micro-powders, and a low CaO calcium aluminate cement system, LC 80 Castables deliver excellent hot mechanical properties and long service life under continuous operation.
Technical Specifications
| Item | Unit | LC 80 Castable |
|---|---|---|
| Al₂O₃ Content | % | ≥ 80 |
| SiO₂ Content | % | ≤ 15 |
| CaO Content | % | ≤ 2.0 |
| Bulk Density | g/cm³ | ≥ 2.7 |
| Compressive Strength (110°C × 3h) | MPa | ≥ 50 |
| Compressive Strength (1500°C × 3h) | MPa | ≥ 80 |
| Flexural Strength (110°C × 3h) | MPa | ≥ 6 |
| Flexural Strength (1500°C × 3h) | MPa | ≥ 9 |
| Permanent Linear Change (1500°C × 3h) | % | ±0.5 |
| Maximum Service Temperature | °C | 1650 |
| Water Addition | % | 5.0 – 6.0 |
Key Features
High alumina content (≈80% Al₂O₃) for excellent refractoriness and thermal stability
Low cement and low CaO formulation to improve high-temperature strength and reduce liquid phase formation
High cold and hot crushing strength ensuring reliable load-bearing performance
Low permanent linear change for good volume stability during long-term service
Dense microstructure with low porosity providing superior abrasion resistance
Good workability and vibration casting performance for easy installation
Suitable for continuous service temperatures up to 1650°C
Typical Applications
LC 80 Refractory Castable is suitable for severe service conditions in various high-temperature industries, including:
Steel industry: reheating furnaces, ladle back linings, furnace roofs
Cement industry: kiln hoods, preheaters, calciners
Non-ferrous metallurgy: aluminum and copper melting furnaces
Petrochemical and chemical industry: reformers, reactors, incinerators
High-temperature industrial kilns and thermal processing units
Production Details
Raw materials: High-purity alumina aggregates, reactive alumina, low CaO cement, performance-enhancing additives
Manufacturing process: Precise proportioning, high-intensity mixing, and strict quality inspection
Quality control: Chemical composition analysis, physical strength testing, and high-temperature performance
Proper curing, drying, and controlled heating are essential to ensure optimal performance.
Packing and Shipping Details
Standard packing: 25 kg moisture-proof paper bags
Bulk option: Jumbo bags available upon request
Palletizing: Wooden pallets with protective wrapping
Transportation: Sea freight, road transport, or rail
Storage: Keep dry and protected from moisture
Frequently Asked Questions (FAQ)
Q1: What is the alumina content of LC 80 Castables?
LC 80 Castables contain approximately 80% Al₂O₃, offering a balance between high-temperature resistance and cost efficiency.
Q2: What is the maximum service temperature?
LC 80 Castables are suitable for continuous service temperatures up to 1650°C, depending on operating conditions.
Q3. How much water is required for mixing?
The recommended water addition is 5.0 – 6.0%, depending on installation method and ambient conditions.
Q4: What installation method is recommended?
Vibration casting is recommended to achieve maximum density and performance.
Q5: Are LC 80 Castables suitable for abrasion-resistant applications?
Yes. Their dense structure and high alumina content provide excellent abrasion resistance in demanding environments.
