Mullite Insulating Bricks

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Insulation and Refractory Materials

mullite insulation brick
Light Weight mullite insulating brick
AC6132 mullite insulating brick
K28/JM28 mullite insulating brick
China mullite insulating brick
mullite insulating brick Manufacturer
mullite insulation brick
Light Weight mullite insulating brick
AC6132 mullite insulating brick
K28/JM28 mullite insulating brick
China mullite insulating brick
mullite insulating brick Manufacturer
Mullite Insulating Bricks

Laurel Mullite Insulating Bricks are high-performance refractory products crafted from mullite aggregate, refractory clay, and lightweight insulating materials, formed through precise molding and high-temperature sintering. With a primary component of mullite (Al₂O₃·SiO₂), these bricks feature low thermal conductivity, high refractoriness , and lightweight construction, making them ideal for thermal insulation in extreme heat environments. They balance excellent heat resistance with structural stability, reducing energy loss while withstanding thermal shock and moderate mechanical loads. Commonly used in kilns, furnaces, and industrial thermal systems, these bricks are asbestos-free, offering a reliable solution for high-temperature insulation and lining applications.

Product Details




  • Standard sizing: 230 x 114 x 65 mm

  • Low bulk density

  • Excellent thermal insulation effect

  • Special sizes and OEM service are also provided!


Mullite Insulating Bricks: Advantages & Features


Low Thermal Conductivity

Dense yet lightweight microstructure minimizes heat transfer, reducing energy costs for industrial furnaces and kilns.

Lightweight & High Strength

Lighter than traditional fireclay bricks but maintains robust mechanical strength, easing installation and reducing structural load.

Superior Thermal Shock Resistance

Resists cracking or spalling from rapid temperature changes, extending service life in fluctuating heat environments.

Chemical Corrosion Resistance

Resistant to alkalis, acids, and molten metal penetration, making them suitable for harsh industrial conditions.

Eco-Friendly & Compliant

Asbestos-free composition meets international safety standards (ASTM, ISO), promoting sustainable and safe industrial practices.


Table parameters

ItemMullite Insulating bricks
Grade23262830
Al2O3(%)≥40≥42≥55≥67≥70
Fe2O3(%)≤1.2≤1.0≤1.0≤0.7≤0.6
Bulk density ( g/cm3 )0.60.80.80.91
Classification Temperature(°C)13001300140015001550
Cold Crushing Strength (Mpa)≥1≥2≥2.3≥2.6≥3.0
Permanent Linear Change(%) x 12hrs≤1.0≤1.0≤1.0≤0.8≤0.8
Thermal conductivity(W/m.k)0.18
(350ºC)
0.23
(350ºC)
0.25
(350ºC)
0.33
(350ºC)
0.43
(350ºC)


Features

★ Low thermal conductivity

★ High-insulating properties

★ High compressive strength

★ Good thermal shock resistance

★ High purity

★ Excellent heat stability.


Mullite Insulating Bricks: Applications

These bricks excel in industrial sectors requiring reliable high-temperature insulation and thermal efficiency:


Ceramics & Refractory Industries: Used in kiln linings, firing chambers, and heat storage systems to maintain consistent temperatures and reduce fuel consumption.

Metallurgy & Foundries: Applied in steel ladles, furnace roofs, and reheating furnaces to withstand thermal stress and protect against molten metal spatter.

Glass Manufacturing: Installed in glass melting furnaces, forehearths, and annealing lehrs to insulate high-temperature zones and improve energy efficiency.

Power Generation: Utilized in biomass boilers, waste incinerators, and gasifiers for thermal insulation, reducing heat loss in combustion chambers.

Chemical & Petrochemical: Suitable for reactors, kilns, and heat exchangers in corrosive environments, offering resistance to chemical attack alongside thermal protection.


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