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furnace refractory bricks Lightweight mullite insulation refractory bricks for industry furnace
1. Description of Lightweight mullite insulation refractory bricks for linings of furnace in industries
Mullite lightweight brick has small holes inside it, so it has high apparent porosity.It can decrease heat loss of furnace wall, then save fuel.Meanwhile, lightweight means less heat storage, fast temp-up and temp-down, which can increase cyclic operation.
2. Feature of Lightweight mullite insulation refractory bricks for linings of furnace in industries
High purity, small impurities,low thermal capacity.
Low thermal conductivity, high strength, good thermal resistance , strong anti-corrosion.
3. Technical parameter of Lightweight mullite insulation refractory bricks for linings of furnace in industries
4. Application of Lightweight mullite insulation refractory bricks
for linings of furnace in industries
Mainly used as thermal insulating layer without the liquid melt touched or gas pickling in the constructing the various industry furnaces.
Item Category | JT23 | JT26 | JT28 | JT30 | JT32 | |
| (℃)Using temperature | 1300 | 1430 | 1520 | 1550 | 1600 | |
| (g/cm3)Density | 0.55-0.65 | 0.8 | 0.9 | 1.0 | 1.1 | |
| (%)Reheating linear shrinkage | 0.4 | 0.5 | 0.8 | 0.8 | 1.0 | |
| (Mpa)Cold crushing strength | 1.8 | 1.8 | 2.5 | 2.8 | 3.5 | |
| (Mpa)Room temperature flexural strength | 1.2 | 1.2 | 1.6 | 1.6 | 2.2 | |
| (350℃ W/mk)Thermal Conductivity | 0.25 | 0.26 | 0.32 | 0.37 | 0.42 | |
| (×10-6/℃)Thermal expansion coefficient | 0.47 | 0.47 | 0.48 | 0.48 | 0.49 | |
| Al2O3 | 45 | 54 | 64 | 72 | 80 | |
| Fe2O3 | 0.9 | 0.9 | 0.8 | 0.7 | 0.5 | |
