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Mullite Insulation Bricks (JM Series: JM23 - JM30)
Henan Jianhong Refractory produces premium Lightweight Mullite Insulation Bricks synthesized from high-purity mullite clinker using the advanced burnout additive process (foam method). This results in a uniform pore structure, ensuring excellent insulating properties while maintaining high mechanical strength.
Classified under the global ASTM JM (Johns Manville) standards, our bricks range from grade JM23 to JM30. Unlike standard insulation materials, our higher grades (JM26+) are designed for direct flame contact, making them the ideal solution for reducing thermal mass and slashing fuel consumption in intermittent kilns.
- Al2O3≥: 42%
- Refractory temperature (℃): 1200~1600℃
- Bulk Density (g/cm³): 0.6-1.1
- Standard Size: 230*114*65mm
- Certification: ISO9001/ISO14001/ISO45001/ISO50001
- Samples: Free Sample Available to Any Country
- Premium custom refractories at factory-direct competitive prices.
- Rapid global delivery backed by 24/7 expert engineering support.
Technical Specifications of Mullite Insulation Bricks (ASTM Standard)
Engineered for low thermal conductivity and structural stability.
| Item/Grade | JM23/K23 | JM26/k26 | JM28/K28 | JM30/K30 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Al2O3（%） | 42 | 45 | 54 | 55 | 56 | 64 | 65 | 66 | 72 |
| Fe2O3（%） | 1.2 | 1 | 0.9 | 0.8 | 1 | 0.75 | 0.65 | 0.65 | 0.55 |
| Bulk Density (g/cm³) | 0.6 | 0.8 | 0.7 | 0.8 | 0.9 | 0.8 | 0.8 | 1 | 1 |
| Cold Crushing Strength/MPa | 1.5 | 2.3 | 2 | 2.3 | 2.8 | 2.3 | 2.8 | 3.3 | 3 |
| Permanent Linear Change/% | -0.55 | -0.4 | -1 | -0.65 | -0.5 | -1 | -0.8 | -0.7 | -0.9 |
| 1260℃×12h | 1300℃×12h | 1400℃×12h | 1400℃×12h | 1400℃×12h | 1500℃×12h | 1500℃×12h | 1500℃×12h | 1600℃×12h | |
| Thermal Conductivity 350℃ ≤/[W/(m·K)] | 0.19 | 0.24 | 0.21 | 0.25 | 0.3 | 0.28 | 0.32 | 0.34 | 0.4 |
Advantages of Jianhong Mullite Insulation Bricks
- Low Thermal Conductivity: Minimizes heat transfer through the kiln walls, keeping the outer shell cool and retaining heat inside.
- Low Heat Storage: The lightweight structure absorbs less heat, allowing for faster heating and cooling cycles (vital for batch kilns).
- High Purity: Low iron and alkali content ensures high refractoriness under load and resistance to reducing atmospheres.
- Precise Dimensions: All bricks are machined/ground after firing to achieve tight tolerances (±1mm), allowing for thin mortar joints (≤1mm).
Standard & Custom Shape Mullite Insulation Bricks for Industrial Kilns
Mullite insulation bricks standard size
- Specifications: 230×114×65mm (standard size)
- Advantages: mass production, uniform precision, easy installation
- Applications: conventional thermal insulation scenarios such as metallurgical kilns and ceramic roller kilns
- Certification: in accordance with GB/T 3003-2020, suitable for 90% of industrial conditions
Mullite insulation bricks special size
- Customization: arc/trapezoidal/perforated bricks according to drawings, error ≤ 0.3mm
- Efficiency: Accurately fit the kiln surface and complex working conditions, improving insulation efficiency by 20%
- Applications: high temperature furnace bends, special-shaped interfaces of chemical pipelines, special insulation layers of environmental protection equipment
Mullite insulation bricks Density
- Bluk density: 0.5~1.2g/cm³, thermal conductivity as low as 0.17W/(m・K)
- Advantages: Weight reduction of 50%+, construction efficiency improvement of 30%, energy saving rate of 40%
- Applications: Reduce kiln weight, enhance insulation, and lower fuel consumption, making them a preferred energy-saving choice.
Mullite insulation bricks grades
- Grade: JM23, JM26, JM28, JM30/K23, K26, K28, K30
- Selection on demand: From low-temperature energy saving to high-temperature strong corrosion resistance, full grade coverage, JIAN HONG Refractory provides you with working condition matching solutions free of charge!
Industrial Applications of Jianhong Mullite Insulation Bricks
- Ceramics: Shuttle kilns, roller kilns (Hot face lining).
- Petrochemical: Ethylene cracking furnaces, reformers.
- Metallurgy: Hot blast stove (backup lining), annealing furnaces.
- Glass: Forehearth superstructure.
Switching from heavy fireclay to JM26 Mullite can reduce fuel consumption by up to 30% in ceramic kilns.
Contact our engineers for a heat loss calculation.
Mullite Insulation Bricks Packing & Export Logistics
Robust seaworthy wooden pallet packaging with shrink wrap protection ensures zero damage during transit.
Efficient container loading and logistics guarantee timely global delivery.
Ready to custom your refractory solutions?
Our team of experts is here to help you find the perfect refractory solution for your high temperature industrial applications.
