TRL CAST AH-90 (N) – Complete Industrial Description

Type: High Alumina Castable Refractory
Al₂O₃ Content: ~90%
Maximum Service Temperature: Up to 1700°C (Approx.)
Appearance: Grey to off-white granular powder

TRL CAST AH-90 (N) is a premium-grade high alumina castable refractory designed for demanding high-temperature industrial applications. Manufactured by , this product is engineered to deliver superior thermal performance, high mechanical strength, and excellent resistance to chemical attack and thermal shock. It is widely used in furnaces, kilns, and various heat-processing units where durability and performance under extreme conditions are essential.

This castable refractory is formulated using high-purity alumina aggregates combined with calcium aluminate cement and advanced additives. The result is a dense, strong, and durable refractory lining material that can withstand continuous high temperatures while maintaining structural integrity.

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Composition and Material Structure

TRL CAST AH-90 (N) is composed of:

• High-purity alumina aggregates (≈90% Al₂O₃)
• Calcium aluminate cement (CAC)
• Fine refractory fillers
• Performance-enhancing additives

The high alumina content ensures excellent resistance to slag, abrasion, and chemical corrosion. Its optimized particle size distribution helps achieve a dense structure with low porosity, improving both mechanical strength and thermal efficiency.

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Key Properties

This high alumina castable offers outstanding technical properties:

• High refractoriness and temperature resistance
• Excellent mechanical strength at elevated temperatures
• Superior thermal shock resistance
• Low porosity and high density
• مقاومة to chemical attack and slag penetration
• Good abrasion and wear resistance
• Stable volume with minimal shrinkage

These properties make it suitable for both continuous and cyclic thermal operations.

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Working Principle

TRL CAST AH-90 (N) works through a dual bonding mechanism:

1. Hydraulic Bonding:
   When mixed with water, the calcium aluminate cement hydrates and forms an initial मजबूत structure at room temperature.
2. Ceramic Bonding:
   At high temperatures, the material undergoes sintering and forms a ceramic bond, significantly enhancing its strength and heat resistance.

This combination ensures long-lasting durability and performance in extreme thermal environments.

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Applications

Steel Industry:
Used in ladles, tundishes, reheating furnaces, and other high-temperature zones.

Cement Industry:
Applied in rotary kilns, preheater systems, and clinker zones.

Power Plants:
Used in boilers, combustion chambers, and ash handling systems.

Petrochemical Industry:
Suitable for reactors and high-temperature processing equipment.

Furnaces and Kilns:
Used in industrial furnaces, soaking pits, and heat treatment units.

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Advantages

• High alumina content ensures superior heat resistance
• Long service life under harsh conditions
• مقاومة to thermal cycling and temperature fluctuations
• Reduced maintenance and downtime
• Easy installation compared to brick lining
• Suitable for complex shapes and structures

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Installation and Usage

For best performance, proper installation is essential:

• Mix with clean water (as per manufacturer recommendation)
• Use mechanical mixing for uniform consistency
• Pour and cast into desired shapes or linings
• Compact properly to eliminate air voids
• Cure under controlled conditions
• Gradually heat after curing to avoid thermal shock

Proper installation ensures maximum strength and durability.

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Technical Parameters (Typical)

• Al₂O₃: ~90%
• Bulk Density: 2.9 – 3.1 g/cm³
• Cold Crushing Strength: High
• Maximum Service Temperature: ~1700°C
• Permanent Linear Change: Low

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Packaging and Storage

TRL CAST AH-90 (N) is typically supplied in 25 kg moisture-resistant bags. It should be stored in a dry and cool environment, protected from moisture and humidity to maintain product quality and shelf life.

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Safety and Handling

Use protective equipment such as gloves, masks, and safety goggles during handling. Avoid inhalation of dust and ensure proper ventilation in the working area.

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Conclusion

TRL CAST AH-90 (N) is a high-performance, high-alumina castable refractory designed for the most demanding industrial applications. Its exceptional heat resistance, strong mechanical properties, and durability make it an ideal solution for furnaces, kilns, and high-temperature processing units. Backed by the expertise of , it ensures reliable performance, reduced maintenance, and long-term operational efficiency in extreme thermal environments.