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Rongsheng JM23 JM26 JM28 JM30 JM32 Light Weight Mullite Insulation Firebrick
Description of High Performance Mullite Insulation Brick
Mullite Insulation Brick is a kind of quality refractory insulation materials for resisting high temperature with features of light weight, low thermal conductivity, thermal insulation and high compression strength in the high temperature furnaces or kilns. Mullite Insulation Bricks are mainly used for the top of hot blast stove, stack and bottom of blast furnace, regenerative chamber of glass melting furnace, lining of ceramic high temperature furnace and so on.
Technical Parameter of Mullite Insulation Brick:
| Item | Index | ||||
| JM23 | JM25 | JM26 | JM27 | ||
| Al2O3 % | ≥40 | ≥50 | ≥55 | ≥60 | |
| Fe2O3 % | ≤1.0 | ≤1.0 | ≤0.9 | ≤0.8 | |
| Apparent porosity % | ≤0.55 | ≤0.80 | ≤0.85 | ≤0.9 | |
| Cold Crush Strength MPa | ≥1.0 | ≥1.5 | ≥2.0 | ≥2.5 | |
| Permanent Linear Change Rate % | 1230℃×12h | 1350℃×12h | 1400℃×12h | 1450℃×12h | |
| -1.5~0.5 | |||||
Thermal Conductivity
W/(m·K) | 200±25℃ | ≤0.18 | ≤0.26 | ≤0.28 | ≤0.32 |
| 350±25℃ | ≤0.20 | ≤0.28 | ≤0.30 | ≤0.32 | |
| 600±25℃ | ≤0.22 | ≤0.30 | ≤0.33 | ≤0.36 | |
| 0.05MPa Refractoriness Under LoadT0.5 ℃ | ≥1080 | ≥1200 | ≥1250 | ≥1300 | |
| Item | Index | |||
| JM28 | JM30 | JM32 | ||
| Al2O3 % | ≥65 | ≥70 | ≥77 | |
| Fe2O3 % | ≤0.7 | ≤0.6 | ≤0.5 | |
| Apparent porosity % | ≤0.95 | ≤1.05 | ≤1.35 | |
| Cold Crush Strength MPa | ≥2.5 | ≥3.0 | ≥3.5 | |
| Permanent Linear Change Rate % | 1510℃×12h | 1620℃×12h | 1730℃×12h | |
| -1.5~0.5 | ||||
| Thermal Conductivity W/(m·K) | 200±25℃ | ≤0.35 | ≤0.42 | ≤0.56 |
| 350±25℃ | ≤0.37 | ≤0.44 | ≤0.60 | |
| 600±25℃ | ≤0.39 | ≤0.46 | ≤0.64 | |
| 0.05MPa Refractoriness Under Load T0.5 ℃ | ≥1360 | ≥1470 | ≥1570 | |
