Sintered Heavy-Duty Mullite Brick

Sintered Heavy-Duty Mullite Refractory Bricks I. Main Product Types Standard Type (ML-70): Composition: Al₂O₃ 68–72%, SiO₂ 25–28%; Bulk Density: 2.6–2.8 g/cm³; Apparent Porosity: ≤18%; High-Purity Type (ML-80): Al₂O₃ ≥78% (using industrial-grade alumina raw material); Load Softening Temperature: ≥1700°C; High-Temperature Flexural Strength (at 1400°C): ≥12 MPa; Composite Reinforced Type (New Technology 2025): Addition of 5–8% nano-ZrO₂, improving thermal shock resistance to 35 cycles (water quenching at 1100°C) and reducing thermal conductivity by 20%. II. Intelligent Production Process Raw Material Preprocessing: AI-based sorting of high-alumina bauxite (Al₂O₃ ±0.5%); Pre-synthesis of mullite (1600°C for 4 hours); Digital Forming System: Isostatic Pressing (200–250 MPa); Online X-ray Nondestructive Testing (100% defect detection rate); Hydrogen-Fired Sintering Technology: Full-Oxygen Combustion Tunnel Kiln (1750°C ±5°C), reducing carbon footprint by 30% compared with conventional kilns. III. Typical Applications in 2026 Application Fields | Component | Performance Highlights Ceramic Industry | Roller Hearth Kiln | Load-Bearing Structure | Service Life Extended to 5 Years Chemical Industry | Ethylene Glycol Reactor Lining | Corrosion Resistance Improved by 40% New Energy | Lithium-Ion Battery Material Sintering Kiln | Energy Consumption Reduced by 18% Aerospace | Rocket Exhaust Deflector | Temperature Resistance Up to 1850°C IV. Performance Advantages Compared with Traditional High-Alumina Bricks Thermal Shock Resistance: 25 cycles vs. 8 cycles (water quenching at 1100°C); High-Temperature Creep: 0.3% vs. 1.2% (1600°C for 50 hours); Economic Analysis: Initial Cost: 50% lower than electrofused mullite bricks; Maintenance Interval: 3 years without major overhauls (vs. 2 years for traditional bricks). V. Physicochemical Specifications (GB/T 2026–ML) 1. Basic Properties (ML-70): – Refractoriness: ≥1790°C – Cold Crushing Strength: ≥80 MPa High-Temperature Characteristics: – Load Softening Point: ≥1650°C – Coefficient of Thermal Expansion: 5.5×10⁻⁶/°C (20–1000°C) Special Indicators: – Alkali Resistance (K₂O): Weight Gain ≤0.8% (1400°C for 100 hours) – Microwave Loss: tanδ ≤0.001 (2.45 GHz)

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Description:

Sintered Heavy-Duty Mullite Refractory Brick

I. Main Product Types

Standard type ( ML-70)

Ingredients: Al₂O₃ 68–72%, SiO₂ 25–28%
Bulk density: 2.6–2.8 g/cm³
Apparent porosity: ≤18%

High-purity type ( ML-80)

Al₂O₃ ≥ 78% (industrial alumina raw material)
Load-softening temperature: ≥1700℃
High-temperature flexural strength ( 1400℃): ≥12 MPa

Composite reinforced type ( 2025 New Technologies)

Add 5–8% nano-ZrO₂
Thermal shock resistance improved to 35 cycles (water-cooled at 1100℃)
Reduced thermal conductivity 20%

II. Intelligent Production Processes

Raw Material Preprocessing

High-alumina bauxite AI sorting (Al₂O₃ ± 0.5%)
Pre-synthesis of mullite ( 1600℃/4h)

Digital Molding System

Isostatic pressing ( 200–250 MPa)
Online X-ray radiographic testing (100% defect detection rate)

Hydrogen-fired sintering technology

Oxy-fuel tunnel kiln ( 1750℃±5℃)
Reduced carbon footprint 30% (compared with traditional kilns)

III. Typical Applications in 2026

Application Fields	Part used	Performance
Ceramic Industry	Load-bearing structure of the roller kiln	Life expectancy extended to 5 years
Chemical industry	Ethylene glycol reactor lining	40% improvement in erosion resistance
New energy	Lithium-ion battery material sintering kiln	Energy consumption reduced by 18%
Aerospace	Rocket plume deflector	Withstands temperatures up to 1850°C

IV. Performance Advantage Comparison

Comparison with Traditional High-Alumina Bricks

Thermal shock resistance: 25 times vs. 8 times (1100℃ water cooling)
High-temperature creep: 0.3% vs 1.2% (1600℃/50h)

Economic Analysis

Initial cost: lower than that of electrofused mullite bricks. 50%
Maintenance cycle: 3-year warranty with no major repairs (vs. the traditional 2-year warranty)

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

1. Basic performance ( ML-70 ):

- Refractoriness: ≥1790℃

- Room-temperature pressure resistance: ≥80 MPa

High-temperature characteristics:

- Start point of load softening: ≥1650℃

- Coefficient of thermal expansion: 5.5×10⁻⁶/°C （ 20–1000°C )

Special indicators:

- Alkali resistance ( Potassium oxide ): Weight gain ≤0.8% （ 1400℃/100h )

- Microwave loss: tanδ ≤ 0.001 （ 2.45GHz )

Keywords:

Sintered Heavy-Duty Mullite Brick

Heavy-duty mullite shaped brick

Mullite brick

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WhatsApp：8615936268068

Mobile phone：+86-15936268068

Email：zzjsrefractory@gmail.com

Sintered Heavy-Duty Mullite Brick

Sintered Heavy-Duty Mullite Refractory Brick

I. Main Product Types

II. Intelligent Production Processes

III. Typical Applications in 2026

IV. Performance Advantage Comparison

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

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