White Mullite Low Coefficient Of Thermal Expansion Gr23 Gr26 Gr28 Mullite Insulation Brick
White Mullite Low Coefficient Of Thermal Expansion Gr23 Gr26 Gr28 Mullite Insulation Brick also known as mullite lightweight insulating firebrick of high purity refractory powder, according to product requirements proportion, adding organic composite filler, the vacuum extrusion molding, high temperature sintering refractory insulation mullite insulating brick .In the main phase of mullite alumina, alumina content in general 65% ~ 75%.A high degree of fire resistance, up to 1790 degrees celsius. Load softening temperature 1600 ~ 1700 degrees to start. Room temperature compressive strength of 70 ~ 260MPa. Good thermal shock resistance. The sintered mullite and fused mullite brick two .
1. White Mullite Low Coefficient Of Thermal Expansion Gr23 Gr26 Gr28 Mullite Insulation Brick is the new energy saving material for insulation.
2. White Mullite Low Coefficient Of Thermal Expansion Gr23 Gr26 Gr28 Mullite Insulation Brick can be used for lining, also can contact with flames directly.
3. White Mullite Low Coefficient Of Thermal Expansion Gr23 Gr26 Gr28 Mullite Insulation Brick using high pure mullite as raw material, is made by adding alumina powder according to different type and then sintering in high temperature furnace.
4. White Mullite Low Coefficient Of Thermal Expansion Gr23 Gr26 Gr28 Mullite Insulation Brick covers four temperature classes: 1300C, 1400C, 1500C, 1550C, according the different content of Al2O3 from 42% to 73%.
| tem | DLG180-1.5L | DLG170-1.3L | LG160-0.8L | LG150-0.8L | LG140-0.7L | LG125-0.5L |
| Al2O3 % | ≥90 | ≥72 | ≥60 | ≥55 | ≥50 | ≥48 |
| Fe2O3 % | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 |
| Bulk Density ( g/cm3) | ≤1.5 | ≤1.3 | ≤1.0 | ≤0.8 | ≤0.7 | ≤0.5 |
| Cold Crushing Strength (MPa) | ≥9.5 | ≥5.0 | ≥3.0 | ≥2.5 | ≥2.0 | ≥1.5 |
| Linear Change on Reheating | ≤1% | 1800 | 1700 | 1600 | 1500 | - | - |
| ≤2% | - | - | - | - | 1400 | 1250 |
| Thermal conductivity(350±25)℃ (W/mK) | ≤0.8 | ≤0.6 | ≤0.4 | ≤0.35 | ≤0.3 | ≤0.2 |
Feature
1. Low levels of iron and other impurities
2. High mechanical intensity
3. High refractoriness, can contact with the flame directly, suitable for various atmosphere
4. High porosity, low volume density, low thermal conductivity
5. Good heat insulating performance and energy-efficient
6. Low creep rare at high temperature,good thermal shock stability
7. Chemical corrosion resistance
8. Long service life
Application
White Mullite Low Coefficient Of Thermal Expansion Gr23 Gr26 Gr28 Mullite Insulation Brick can be directly contact with the flame,this insulating brick can be used as linings or thermal preservation layers in various industrial furnaces and kilns in metallurgical industry, ceramic industry, chemical industry, machinery industry, such as blast furnace, hot blast stoves ,electric arc furnace, cement kiln,melting furnace, ignition furnace, flue, refining equipment, heating equipment and piping, regeneration device, gas furnace, soaking furnace, annealing furnace, heat reaction chamber and other thermal industrial equipment.
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