Lightweight mullite insulating fire brick for high temperature applications

Lightweight Mullite Brick (Insulating Fire Brick)

High-purity mullite insulation brick for industrial furnace hot face and backup lining

🔥 Up to 1760°C 🌡️ Low Conductivity 💎 High Purity ✂️ Easy Cutting

Lightweight Mullite Brick is manufactured from high-purity refractory materials, precisely proportioned with organic composite fillers, vacuum extruded, and high-temperature sintered to form premium insulating fire brick products. Features include low thermal conductivity, low heat storage, high purity, low impurity content, direct flame contact capability, high strength, excellent thermal shock resistance, precise dimensions, and can be cut to any shape.

📋 Quick Specifications

Classification Temperature 1260°C – 1760°C

Bulk Density 800 – 1100 kg/m³

Available Grades JM-23 to JM-32

Standard Size 230 × 114 × 65 mm

📧 Get Quote 📊 Technical Data

Product Features

🌡️

Low Thermal Conductivity

Excellent insulation with thermal conductivity as low as 0.21 W/m·K at 350°C

📉

Low Heat Storage

Minimal heat absorption for faster heating cycles and energy savings

💎

High Purity

Low impurity content with Al₂O₃ content up to 79% for superior performance

🔥

Direct Flame Contact

Can withstand direct flame exposure without degradation

💪

High Strength

Cold crushing strength up to 4.6 MPa for structural integrity

✂️

Easy Machining

Precise dimensions with ability to cut to any required shape

Technical Specifications

Property	JM-23	JM-26	JM-28	JM-30	JM-32
Classification Temperature (°C)	1260	1430	1540	1650	1760
Bulk Density (kg/m³)	800	800	900	1000	1100
Reheat Linear Change (%)	1280°C×3h ≤0.6	1380°C×3h ≤0.6	1500°C×3h ≤0.8	1550°C×3h ≤0.8	1570°C×3h ≤0.8
Cold Crushing Strength (MPa)	1.8	2.4	3.0	3.6	4.6
Thermal Expansion @1000°C (%)	0.5	0.5	0.55	0.58	0.60
Thermal Conductivity @350°C (W/m·K)	0.21	0.25	0.28	0.33	0.40
Al₂O₃ Content (%)	40	50	62	70	79
Fe₂O₃ Content (%)	≤1.0	≤1.0	≤0.8	≤0.6	≤0.5

📐 Product Dimensions

Standard Size: 230 × 114 × 65 mm

Custom Sizes: Available upon request

Packing: Pallets or carton boxes

Typical Applications

Metallurgy industry furnaces

Petrochemical furnaces

Building materials kilns

Ceramic industry kilns

Machinery heat treatment

Melting furnaces

Converter furnaces

Heating equipment

Refining equipment

Regenerative systems

Hot blast stoves

Heating furnaces

Soaking furnaces

Heat treatment furnaces

Electric resistance furnaces

Tunnel kilns

Roller kilns

Shuttle kilns

Bell kilns

Glass tank furnaces

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