Mullite Brick is high-performance aluminosilicate shaped refractory brick, main mineral phase is mullite (3Al₂O₃·2SiO₂), sintered from bauxite and kyanite raw materials at high temperature. Its performance sits between high alumina brick and corundum brick.
Key Features：
- Excellent thermal shock resistance, low thermal expansion coefficient.
- High refractoriness under load, stable high-temperature volume stability.
- Moderate slag resistance, good creep resistance at high temperature.
- Low thermal conductivity, good heat insulation property.
- Less tendency to spalling under frequent temperature cycling.
Available Grades：
M60: Al₂O₃ ≥60%
M70: Al₂O₃ ≥70%
M75: Al₂O₃ ≥75%
Main Applications：
- Ceramic tunnel kiln, shuttle kiln, kiln car lining.
- Hot blast stove, heating furnace, heat treatment furnace lining.
- Petrochemical furnace, cement kiln preheater and transition zone.
- Non-ferrous metal annealing furnace and low-erosion high-temperature zones.
Available Sizes & Packing：
Standard size: 230×114×65 mm; Optional:230×150×65 mm, custom wedge and arch shapes available.
Packing: Wooden pallets with plastic wrapping, or as customer request.
COA certificate provided per batch.
Specification:
Chemical Composition | M60 | M70 | M75 |
Al₂O₃ | 60% min | 70% min | 75% min |
SiO₂ | 35-38% | 25-28% | 20-23% |
Fe₂O₃ | 1.5% max | 1.2% max | 1.0% max |
Apparent Porosity | 20% max | 19% max | 18% max |
*Specifications and Sizes can be customized upon request.
Available Sizes & Packing：
Standard size: 230×114×65 mm; Optional:230×150×65 mm, custom wedge and arch shapes available.
Packing: Wooden pallets with plastic wrapping, or as customer request.
COA certificate provided per batch.