Lightweight mullite bricks


Lightweight mullite bricks, with their characteristics of low thermal conductivity, high strength, and resistance to thermal shock, have become a key material for energy conservation and consumption reduction in high-temperature kilns.


Product Introduction

In high-temperature industrial sectors such as steel, ceramics, and glass, a refractory material known as lightweight mullite bricks is quietly transforming traditional production processes. These lightweight refractory bricks, whose primary crystalline phase is mullite (3Al₂O₃·2SiO₂), have become a key material for energy conservation and consumption reduction in high-temperature kilns, thanks to their properties of low thermal conductivity, high strength, and excellent resistance to thermal shock.

Product Parameters

Project Lightweight Mullite Insulation and Thermal-Resistant Bricks
MIB-0.6 MIB-0.8 MIB-1.0 MIB-1.2
Maximum operating temperature, ℃ 1350 1400 1400 1500
Al₂O₃ ≥ 50 55 60 60
Fe₂O₃% ≤ 1.3 1.0 0.8 1.5
Volumetric density, g/cm³ 0.6 0.8 ≤1.0 ≤1.2
Room-temperature compressive strength, MPa ≥ 3 3 5 6
Thermal conductivity, W/(m·K) ≥
(Average temperature: 800℃)
0.30 0.35 0.40 0.50
Application It is used as thermal insulation lining for gasifiers, synthesis gas furnaces, and carbon black furnaces in the petrochemical industry, as well as thermal insulation layers for high-temperature kilns used in the production of ceramics and refractory materials.


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