High Alumina Refractory Castable is a high-performance unshaped refractory material widely used in industrial furnaces and kilns. Produced by Highland Refractory, it is designed for steel, cement, petrochemical, and ceramic industries. This castable offers excellent thermal shock resistance, chemical stability, and wear resistance, making it ideal for high-temperature applications such as boiler linings, blast furnace hot blast stoves, heating furnaces, and ceramic kilns.
With a combination of compact bulk density, low porosity, and strong resistance to slag or solution penetration, our High Alumina Refractory Castable ensures durability and reliability in demanding industrial environments. Available in standard formulations and customized specifications, it can be cast into complete linings or prefabricated masonry blocks for specific applications.
High Alumina Refractory Castable is a mixture of high-quality alumina aggregates, refractory powders, and a binding agent. It is designed to withstand extreme temperatures ranging from 1400°C to 1500°C, maintain structural integrity under thermal shock, and resist chemical corrosion from molten slags or industrial solutions.
It is particularly suitable for:
Industrial kilns and furnaces
Heat treatment furnace linings
Petrochemical catalytic cracking reactor linings
Blast furnace tapping grooves and iron tapping tanks
High-temperature sections of lime shaft kilns and rotary kiln heads
Power plant boiler linings
High Alumina Refractory Castable
High Thermal Shock Resistance: Maintains stability under rapid heating and cooling cycles.
Wear and Abrasion Resistance: Extends service life in high-wear industrial conditions.
Low Porosity and High Density: Reduces penetration of molten slags and chemicals.
Chemical Stability: Resistant to acidic and alkaline industrial solutions.
Versatile Construction: Can be cast into full linings or prefabricated blocks for modular installations.
High Mechanical Strength: Excellent compressive strength for demanding industrial applications.
| Specification | RS-1 | RS-2 | RS-3 |
|---|---|---|---|
| Al₂O₃ Content (%) | 60 | 65 | 70 |
| Bulk Density (g/cm³) | 2.40 | 2.60 | 2.80 |
| Cold Crushing Strength (MPa) | 55 | 60 | 65 |
| Crushing Strength at 1000°C (MPa) | 80 | 90 | 100 |
| Modulus of Rupture (MPa) | 7 | 8 | 9 |
| Modulus of Rupture at 1000°C (MPa) | 9 | 11 | 13 |
| Linear Change at 1000°C (%) | ±0.3 | ±0.3 | ±0.3 |
| Room Temperature Wear (cm³) | 9 | 8 | 7 |
| Thermal Shock Resistance (times) | 20 | 20 | 20 |
| Maximum Service Temperature (°C) | 1400 | 1450 | 1500 |
High Alumina Refractory Castable is suitable for high-temperature industrial operations, including but not limited to:
Steel Industry: Blast furnace hot blast stoves, iron tapping tanks, molten steel refining devices.
Cement Industry: Rotary kiln linings, heating furnace linings, lime shaft kiln high-temperature sections.
Petrochemical Industry: Catalytic cracking reactor linings and high-temperature wear-resistant structures.
Power Generation: Boilers, industrial heat treatment furnaces, and burner linings.
Ceramics and Glass: Ceramic kilns, soaking furnaces, and other high-temperature treatment equipment.
Its versatility allows for both in-situ casting and prefabricated block installation, providing flexible solutions for various industrial applications.
High Alumina Refractory Castable
Raw Material Selection: High-quality alumina aggregates, powders, and binders are carefully chosen.
Mixing: Precise formulation of aggregates, powders, binders, and additives. Mixing ensures uniformity for optimal performance.
Packaging: Stirred castable is packaged with moisture-proof protection and labeled for traceability.
Storage: Packaged castables are stored under controlled conditions to maintain product integrity.
Mix dry materials thoroughly before adding water, and strictly control water content.
Use mechanical mixers; manual mixing is not recommended.
Castable should be used within 30 minutes after preparation to avoid premature setting.
Follow design thickness and avoid anchor conflicts during construction.
Gradually heat after pouring to prevent thermal shock.
Inspect cast linings after curing and address any construction issues to ensure performance.
Highland Refractory is a trusted manufacturer with decades of experience in refractory materials. Our High Alumina Refractory Castable offers:
Reliable Supply: Strong production capacity to meet large-scale industrial needs.
Advanced Manufacturing: Professional refractory brick and castable production plants with modern equipment.
Quality Assurance: Strict process control, from raw material procurement to final inspection.
Technical Support: Expert guidance for installation and application.
After-Sales Service: Full support to ensure your project success and satisfaction.
Q1: What is the maximum operating temperature of High Alumina Refractory Castable?
A1: Depending on the specification, it can withstand temperatures from 1400°C to 1500°C.
Q2: Can it be customized for specific industrial applications?
A2: Yes, Highland Refractory can provide custom formulations and prefabricated blocks according to your requirements.
Q3: How is the castable applied?
A3: It can be cast in-situ or assembled as prefabricated blocks, depending on the project design.
Q4: What industries use high alumina castables?
A4: Steel, cement, petrochemical, power generation, ceramics, and glass industries widely use this material.
Q5: How to ensure long service life?
A5: Proper mixing, casting, curing, and gradual heating are essential. Avoid manual mixing and ensure correct thickness during construction.
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