Mullite Furnace Lining
Lightweight Mullite SeriesLightweight mullite monolithic or modular furnace lining chambers are manufactured from high-purity mullite porous insulation materials. Features low thermal mass, rapid heat-up/cool-down cycles, and excellent thermal shock resistance for modern energy-saving electric kilns.
| Parameter | Specification |
|---|---|
| Material | Lightweight Mullite (JM26 / JM28 / JM30) |
| Max Service Temp | 1400°C ~ 1650°C |
| Bulk Density | 0.8 ~ 1.05 g/cm³ |
| Cold Crushing Strength | ≥ 2.5 ~ 3.8 MPa |
| Thermal Conductivity (600℃) | ≤ 0.34 W/(m·K) |
| Structure Type | Monolithic / Modular Interlocking Chamber |
Material Introduction
Lightweight Mullite Furnace Linings are composed of synthetic mullite (3Al₂O₃·2SiO₂) micro-porous refractory materials shaped through precision molds and calcined above 1500°C.
Compared with traditional dense refractory brick linings that suffer from huge heat storage and slow temperature ramps, lightweight mullite chambers have low thermal inertia. They help shorten furnace ramp-up time and reduce electricity use, and are well suited as lining for energy-efficient industrial furnaces.
Product Features
- High Energy Efficiency & Ultra-Low Heat Storage: Low bulk density and minimal heat capacity shorten cycle times.
- High-Temperature Durability: Resists continuous service up to 1650°C without shrinkage or powdering.
- Outstanding Thermal Shock Resistance: Tolerates repeated furnace door openings and rapid cooling cycles.
- Uniform Chamber Temperature: Balanced thermal reflection ensures homogeneous heat distribution for higher batch yield.
- Customizable Perforation & Geometry: Tailored openings for heating elements, viewports, thermocouple ports, and exhausts.
Specification Parameters
| Index | JM26 | JM28 | JM30 |
|---|---|---|---|
| Classification Temp (℃) | 1450 | 1550 | 1650 |
| Bulk Density (g/cm³) | 0.80 | 0.90 | 1.03 |
| Cold Crushing Strength (MPa) | ≥ 2.0 | ≥ 3.0 | ≥ 3.8 |
| Al₂O₃ (%) | ≥ 56 | ≥ 68 | ≥ 73 |
| Fe₂O₃ (%) | ≤ 0.8 | ≤ 0.6 | ≤ 0.5 |
| Thermal Conductivity @ 600℃ (W/m·K) | 0.29 | 0.34 | 0.43 |
