NMJ-1 High-strength Wear-resistant Castable is a premium-grade cement-based composite dry mortar. It is formulated through industrialized production using high-strength aluminate cement, selected mineral admixtures, high-performance aggregates, and specially designed anti-cracking and wear-resistant agents. This monolithic refractory material offers outstanding resistance to mechanical wear, high compressive strength, and excellent thermal stability, making it ideal for use in harsh industrial environments where abrasive forces and high temperatures are constant challenges.
Unlike conventional castables, KSL-60 does not require extensive vibration or formwork and can be rammed, troweled, or pneumatically gunned into place. This makes it particularly suitable for repairs and complex-shaped refractory linings. With an Al₂O₃ content of approximately 60%, this castable offers a balance between thermal efficiency and mechanical durability.
Technical Specifications
| Parameter | Value |
|---|---|
| Al₂O₃ (%) ≥ | 85 |
| Bulk Density (g/cm³) ≥ | 3.0 |
| Cold Crushing Strength (MPa) ≥ | 110℃ × 24h: 1501100℃ × 3h: 60 |
| Modulus of Rupture (MPa) ≥ | 110℃ × 24h: 26 |
| Permanent Linear Change (1100℃ × 3h, %) | -0.15 ~ 0 |
| Room Temperature Wear Volume (cm³) ≤ | 3 |
Key Features
Exceptional Wear Resistance: Provides superior resistance to abrasive and erosive wear, extending service life in high-wear zones.
High Mechanical Strength: Outstanding cold crushing strength ensures durability under mechanical stress.
Thermal Stability: Maintains structure and performance under high-temperature cycling.
Low Linear Shrinkage: Excellent dimensional stability at elevated temperatures.
Easy Installation: Delivered as a one-component dry mix, it can be installed by casting or vibrating without special equipment.
Typical Applications
Circulating Fluidized Bed (CFB) Boiler Lining
Cement Rotary Kiln Preheater and Riser Ducts
Blast Furnace Runner Systems
Petrochemical and Refining Units
Waste Incineration Plants
Steel Ladle and Tundish Impact Zones
Production Details
NMJ-1 is manufactured under strict quality control using:
High-purity Alumina Cement as binder
Specially-graded High-strength Aggregates
Industrial-grade Anti-wear Additives
Micro-powder Mineral Admixtures to enhance binding and thermal resistance
Each batch undergoes rigorous testing for strength, density, and wear loss to ensure consistency and quality.
Packing and Shipping Details
Packaging: 25kg or 50kg kraft paper bags with inner moisture-proof lining
Optional Packaging: Jumbo bags or customized packaging available upon request
Palletizing: Shrink-wrapped and strapped on export-grade pallets
Storage Conditions: Store in a dry, ventilated area; avoid contact with moisture
Frequently Asked Questions (FAQ)
Q1: Can NMJ-1 be used directly after mixing with water?
No. After mixing, the castable must be cured and dried following proper procedures before being exposed to high temperatures to avoid steam explosion and cracking.
Q2: What is the recommended water addition for mixing?
Typically, 5–7% clean water by weight of dry material. The exact amount may vary depending on the installation method and site conditions.
Q3. What installation methods are suitable for NMJ-1?
NMJ-1 is ideal for vibrating casting and pouring. Ensure proper vibration for dense compaction and optimal performance.
Q4: Is on-site customization possible?
Yes. We can tailor the formulation based on your specific service conditions and technical requirements.
Q5: How does NMJ-1 compare to lower-grade wear-resistant castables?
NMJ-1 provides higher alumina content, density, and strength, making it suitable for the most demanding applications involving severe wear and mechanical impact.
