Light mullite insulating brick takes mullite as its main phase with Al₂O₃ of 50%–85%, featuring low thermal conductivity, low bulk density and good high-temperature structural strength for insulating and composite linings of ceramic kilns, glass furnaces and reheating furnaces.
| Al₂O₃ content | ≥60% |
|---|---|
| Bulk density | 1.0～1.3 g/cm³ |
| Cold crushing strength | ≥4 MPa |
| Thermal conductivity (350℃) | 0.35～0.5 W/(m·K) |
| Reheat linear change (1400℃×12h) | ±0.5% |
| Service temperature | 1400～1500℃ |
| Refractoriness | ≥1700℃ |
Light mullite insulating brick is a high-performance lightweight refractory product with mullite as its main crystalline and bonding phase. The Al₂O₃ content is generally 50%–85%, and grades are classified by service temperature as JM-23, JM-26, JM-28 and JM-30. A uniform porous structure is formed by adding organic burnout materials, giving the brick low thermal conductivity, low bulk density and relatively high strength — an ideal insulating lining for energy-saving industrial kilns.
Light mullite brick has mullite as its main phase with higher Al₂O₃ (50%–85%) and purer crystals, providing better high-temperature structural strength and creep resistance — suitable for higher temperatures and fluctuating atmospheres. Light high alumina brick is more economical for general medium-temperature insulation.
1350–1550°C depending on grade (JM-23 to JM-30); select the grade according to the kiln operating temperature.
Yes. High-purity mullite lightweight brick has good thermal stability for flame-facing linings. For parts with severe slag attack or mechanical wear, combine with dense bricks.
Yes. Henan Songrui New Refractory Materials Co., Ltd. supports processing of various sizes and special shapes per drawing, with complete kiln package supply.
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