LDSLC Series Low Cement Castable – High-Strength Refractory for Demanding Thermal Applications
Our LDSLC Series Low Cement Castable is engineered for applications demanding exceptional strength, density, and corrosion resistance in the critical mid-to-high temperature range. By utilizing low-calcium aluminate cement (typically <3% CaO content) as a binder and optimizing the particle size distribution, this castable achieves a uniform, low-porosity microstructure. This advanced formulation results in outstanding hot strength, excellent volume stability, and superior resistance to slag penetration and abrasion, making it a top-tier choice for severe service conditions.
Each grade is produced under strict quality control protocols, ensuring consistent chemical composition, stable physical properties, and reliable performance at continuous service temperatures up to 1780°C. The low CaO content fundamentally eliminates the traditional strength dip in the 800-1200°C range, providing consistent and high mechanical performance throughout the entire heating profile.
Technical Specifications
| Item |
LDSLC75 |
LDSLC80 |
LDSLC85 |
LDSLC95 |
| Service Temp ℃ |
1650 |
1700 |
1750 |
1780 |
| Bulk Density (g/cm³) (Dried at 110℃) |
2.55 |
2.6 |
2.7 |
3.0 |
| CCS 110℃ (MPa) 1100℃ 1500℃ |
65 75 80 |
70 80 85 |
80 90 100 |
90 95 110 |
| MOR 110℃ (MPa) 1100℃ 1500℃ |
9 10 11 |
10 11 12 |
11 12 13 |
13 14 15 |
| Max Grain Size (mm) |
6 |
6 |
6 |
6 |
| Chemical Analysis(%) Al₂O₃ CaO Fe₂O₃ |
75 2-3 2.4 |
80 2-3 2.0 |
85 2-3 1.8 |
95 2-3 1.5 |
| Application Guidelines Mixer Placement Water/Mixer Temp℃ Mixing Time(Min):Dry/Wet |
P V/T 20±5 2/5 |
P V/T 20±5 2/5 |
P V/T 20±5 2/5 |
P V/T 20±5 2/5 |
| Water % (Typical) |
7-9 |
7-9 |
6-8 |
6-7 |
Key Advantages
- Exceptional Mid-Temperature Strength - The low CaO content fundamentally eliminates the traditional strength dip in the 800-1200°C range, providing consistent and high mechanical performance throughout the entire heating profile.
- Optimized Density and Low Porosity - Achieves a dense, uniform structure that acts as a robust barrier against corrosive slag and abrasive materials, extending lining service life significantly.
- Enhanced Corrosion and Abrasion Resistance - The impermeable matrix significantly reduces infiltration by molten slags and fluxes, while the high density resists wear and erosion in high-velocity particle environments.
- High Refractoriness and Volume Stability - Maintains dimensional stability and structural integrity under prolonged exposure to high temperatures, reducing the risk of cracking and spalling.
Primary Applications
- Cement and Lime Industry - Transition zones, burning zones, and inlet ducts of rotary kilns; preheater cyclones and riser ducts where abrasion and thermal shock are severe.
- Steel Industry - Ladle well blocks, tundish impact pads, slag lines, refining vessel linings, and steel ladle linings requiring high corrosion resistance.
- Non-Ferrous Metals - Furnace linings in copper, lead, and zinc smelting operations where aggressive slag attack and high temperatures are common.
Frequently Asked Questions
Q1: What makes low cement castable different from traditional castables?
Traditional castables typically contain 15-30% calcium aluminate cement, which can cause a significant strength dip in the 800-1200°C range. Our LDSLC series uses <3% CaO content, which fundamentally eliminates this weakness, providing consistent high strength across the entire temperature range. The lower cement content also results in higher density, lower porosity, and superior corrosion resistance.
Q2: How do I select the right LDSLC grade for my application?
The selection depends on your maximum operating temperature, chemical environment, and abrasion requirements. LDSLC75 is suitable for general-purpose applications up to 1650°C. LDSLC80 and LDSLC85 offer higher alumina content for more demanding environments. LDSLC95 is recommended for ultra-high-temperature applications exceeding 1750°C requiring maximum purity and corrosion resistance. Please provide your design specifications for a tailored recommendation.
Q3: What is the recommended water addition for mixing?
Typical water addition ranges from 6-9% depending on the grade. LDSLC75 and LDSLC80 typically require 7-9% water. LDSLC85 requires 6-8%, and LDSLC95 requires 6-7%. The exact water demand should be adjusted based on site conditions and workability requirements. We recommend conducting trial mixes to determine the optimal water content for your specific installation conditions.
