LC 60 Castable is a 60% alumina low cement refractory castable developed for medium to high-temperature industrial furnace linings. It is formulated with selected high-purity alumina aggregates, optimized particle size distribution, and a low CaO cement system.
This combination provides high mechanical strength, excellent volume stability, and reliable thermal performance under continuous service conditions up to 1450°C.
Compared with conventional refractory castables, LC 60 Castable requires less mixing water and produces a denser structure after curing and firing. This results in improved resistance to abrasion, thermal shock, and chemical attack, making it a cost-effective solution for long-term furnace operation and reduced maintenance.
Technical Specifications
| Item | Unit | LC 60 Castable |
|---|---|---|
| Al₂O₃ Content | % | ≥ 60 |
| SiO₂ Content | % | ≥ 35 |
| CaO Content | % | ≤ 2.1 |
| Bulk Density | g/cm³ | ≥ 2.5 |
| 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) | % | ±0.5 |
| Maximum Service Temperature | °C | 1450 |
| Water Addition | % | 6.0 – 6.5 |
Key Features
60% Al₂O₃ content with balanced alumina–silica composition
Low cement (low CaO ≤ 2.1%) for improved high-temperature stability
High cold and hot compressive strength
Low permanent linear change after high-temperature firing
Good workability and vibration casting performance
Dense structure and excellent abrasion resistance
Stable service performance up to 1450°C
Typical Applications
LC 60 Castable is widely used in various industrial heating and thermal processing equipment, including:
Steel industry: reheating furnaces, soaking pits, furnace walls and roofs
Cement industry: preheaters, calciners, tertiary air ducts
Non-ferrous metallurgy: melting furnaces, holding furnaces
Chemical and environmental equipment: incinerators, thermal reactors
General industrial kilns and high-temperature chambers
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 maximum service temperature of LC 60 Castable?
The maximum recommended service temperature is 1450°C under normal operating conditions.
Q2: How much water is required for mixing?
The recommended water addition is 6.0–6.5%, depending on installation method and ambient conditions.
Q3. Is LC 60 Castable suitable for abrasion-resistant applications?
Yes. Its dense structure and high strength provide good abrasion and mechanical impact resistance.
Q4: Can LC 60 Castable replace traditional high-cement castables?
In most medium to high-temperature applications, LC 60 Castable offers better performance, lower porosity, and longer service life than conventional high-cement castables.
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.
