Features
1. Low thermal conductivity;
2. Low thermal melting. Due to low thermal conductivity, mullite series light thermal insulation brick accumulates little heat energy, which has obvious energy-saving effect in intermittent operation;
3. High thermal compressive strength;
4. Can be processed into special shapes. To reduce the number of bricklaying blocks and joints, saving costs;
5. Low content of impurities, with very low content of oxide such as alkali metal in iron box, therefore, high refractoriness; The high aluminum content makes it maintain good performance in reducing atmosphere.
6. Accurate appearance size, speed up the masonry, reduce the amount of refractory mud, ensure the strength and stability of the masonry, thereby prolonging the life of the lining.
Application
It has a wide range of applications, mainly used in thermal equipment and industrial kiln heat insulation layer, can be used for no strong high temperature molten material erosion and erosion effect of parts, some directly contact with the flame surface coated with a layer of refractory coating, reduce slag erosion and furnace gas dust erosion, reduce damage.
Physical And Chemical Indicators
| Brand
Properties |
clay | High aluminum | |||||
| NG-0.5 | NG-0.6 | NG-0.8 | NG-1.0 | LG-0.6 | LG-0.8 | LG-1.0 | |
| Bulk density(g/cm3) | 0.5 | 0.6 | 0.8 | 1.0 | 0.6 | 0.8 | 1.0 |
| Cold crush strength（MPa）≥ | 1.5 | 2.0 | 2.5 | 3.4 | 1.96 | 2.94 | 4.0 |
| Average temperature of thermal conductivity 350±25℃（w/k·m） | 0.18 | 0.25 | 0.35 | 0.5 | 0.25 | 0.32 | 0.45 |
| 0.1MPa Initial temperature of softening under load（℃）≥ | 1160 | 1250 | 1280 | 1300 | 1300 | 1350 | 1380 |
| Al2o3(%)≥ | 35 | 40 | 42 | 42 | 50 | 52 | 52 |
| Fe2o3(%)≤ | 2.5 | 2.5 | 2.0 | 2.0 | 1.8 | 1.6 | 1.5 |
| Maximum service temperature（℃） | 1150 | 1200 | 1280 | 1300 | 1300 | 1350 | 1380 |
