$Refractory castable$

Refractory castable

Refractory Castables I. Main Product Types and Characteristics Low-Cement Series (LCC): Cement content 3–8%, Al₂O₃ 50–90%; water addition 5–7%; bulk density 2.3–3.0 g/cm³; service temperature: 1400–1800°C. Ultra-Low-Cement Series (ULCC): Cement content 1–3%, with the addition of ultrafine powders (d₅₀ ≤ 1 μm); compressive strength ≥ 80 MPa (after drying at 110°C); slag penetration resistance improved by 40%. Self-Flowing Castable (SCC): Flow value ≥ 260 mm (no vibration required); suitable for constructing complex structures, such as burners. New Nano-Composite Castable: Contains 2–5% nano-Al₂O₃/SiO₂, enhancing thermal shock resistance to 50 cycles (water cooling from 1100°C) and achieving wear resistance meeting ASTM C704 standards. II. Modern Production Processes Intelligent batching system; three-dimensional motion mixing (CV ≤ 0.3%); particle-size gradation optimized using the Dinger–Funk equation; composite bonding technologies: hydration bonding (aluminate cement), coagulation bonding (silica sol + ultrafine powders), and chemical bonding (phosphates); green production innovations, including water-free binders (reducing baking energy consumption by 30%) and a waste-recycling rate of 45%. III. Application Scenarios Typical Applications and Technical Benefits New Energy Lithium-Ion Battery Cathode Sintering Kiln: Service life extended to 5 years. Hydrogen-Energy Electrolyzer Liner: Resistance to hydrogen embrittlement improved by 60%. Environmental Protection Hazardous-Waste Melting Furnace: Corrosion resistance reaches Class A. Aerospace Rocket Engine Liner: Withstands temperatures up to 2000°C under 10 MPa. IV. Performance Comparison Advantages over Traditional Shaped Bricks Construction Efficiency: Increased by 300% (no masonry required). Integrity: No joints, with air-tightness improved by 50%. Ease of Repair: Local patching possible. Economic Analysis Initial Cost: 20–30% lower than shaped bricks made of the same material. Overall Benefits: Maintenance costs reduced by 60%. V. Physicochemical Specifications (GB/T 2026–NCC) 1. Basic Properties (LCC–70): – Bulk density: 2.65 ± 0.05 g/cm³ (GB/T 2997). – Compressive strength: ≥ 60 MPa after drying at 110°C for 24 hours. High-Temperature Characteristics: – Flexural strength (1400°C for 3 hours): ≥ 12 MPa. – Linear change after re-firing (1500°C): ± 0.3%. Special Indicators: – Resistance to alkali erosion (K₂CO₃ at 1300°C): Penetration ≤ 1.0 mm. – Thermal conductivity (800°C): 1.2 W/(m·K).

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Refractory castables

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Description:

Refractory castable

I. Main Product Types and Characteristics

Low-cement series ( LCC)

Cement content 3–8%, Al₂O₃ 50–90%
Amount of water added 5–7%, bulk density 2.3–3.0 g/cm³
Applicable temperature: 1400-1800℃

Ultra-low cement series ( ULCC)

Cement content 1–3%, with the addition of ultrafine powder (d50 ≤ 1 μm)
Compressive strength ≥ 80 MPa (after drying at 110°C)
Enhanced slag resistance 40%

Self-flowing castable ( SCC)

Flow value ≥ 260 mm (no vibration required)
Suitable for the construction of complex structures (such as burners).

New-type nano-composite castable

Add 2–5% nano-Al₂O₃/SiO₂
Thermal shock resistance improved to 50 cycles (1100°C water cooling)
Wear resistance reaches ASTM C704 Standard

II. Modern Production Processes

Intelligent Batching System

Three-dimensional motion mixing ( CV ≤ 0.3%)
Particle size distribution AI Optimization (Dinger-Funk Equation)

Composite bonding technology

Hydration bonding (aluminate cement)
Agglomeration and bonding (silica sol +Ultrafine powder)
Chemical bonding (phosphate)

Green Production Innovation

Water-free binder (reduces baking energy consumption) 30%)
Waste recycling rate reaches 45%

III. Application Scenarios

Application Fields	Typical site	Technical Benefits
New energy	Lithium-ion battery cathode sintering kiln	Lifespan extended to 5 years
Hydrogen energy	Electrolyzer lining	Hydrogen embrittlement resistance improved by 60%
Environmental protection	Hazardous Waste Melting Furnace	Corrosion resistance reaches Class A
Aerospace	Rocket engine liner	Temperature resistance: 2000℃ / 10 MPa

IV. Comparative Performance Advantages

Comparison with Traditional Molded Bricks

Construction efficiency: improved 300% (no masonry required)
Integrity: Seamless construction for enhanced air tightness. 50%
Convenient repair: can be repaired locally

Economic Analysis

Initial cost: lower than that of molded bricks made from the same material. 20-30%
Overall Benefits: Reduced Maintenance Costs 60%

V. Physicochemical Indices ( GB/T 2026-NCC)

1. Basic performance ( LCC-70 ):

- Bulk density: 2.65 ± 0.05 g/cm³ （ GB/T 2997 )

- Withstand Voltage Strength: 110℃ × 24 h ≥ 60 MPa

High-temperature characteristics:

- Flexural strength ( 1400℃ × 3 h ): ≥12MPa

- Change in the re-burn line ( 1500°C ): ±0.3%

Special indicators:

- Alkali resistance ( K₂CO₃/1300℃ ): ≤1.0mm Permeation

- Thermal conductivity ( 800°C ): 1.2 W/(m·K)

Keywords:

Refractory castable

Corundum refractory plastic

Magnesium ramming mass

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Email：zzjsrefractory@gmail.com

Refractory castable

Refractory castable

I. Main Product Types and Characteristics

II. Modern Production Processes

III. Application Scenarios

IV. Comparative Performance Advantages

V. Physicochemical Indices ( GB/T 2026-NCC)

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