Light Weight Silica Insulation Brick Silica in more than 91%, the bulk density of 1.2 g / cm3 below the light refractory. Refractoriness and load softening temperature and composition of the same ordinary silica brick or less. Has a good thermal shock resistance. Lightweight silica brick is classified in group 30 by ASTM standards. which is also known as siliceous silica insulating brick over 91%, volume density under 1.2 g/cm3 lightweight refractory materials Refractoriness and refractoriness under load and the composition of the same common silica brick But due to the porosity, so the compression strength of resistance to slag corrosion resistance than ordinary silica brick, such as the thermal shock resistance are improved.
1.Low bulk density,
2.Low thermal conductivity,
3.High apparent porosity,
4.Good thermal shock resistance,
5.Great high-temperature mechanical strength,
6.High-temperature stable volume change,
7.Strong acid slag erosion resistance.
Lightweight silica brick is mainly used to preserve heat in the glass industry, iron&steel industry, and ceramic furnaces. The main applications are the low-temperature parts such as blast furnaces and hot blast furnaces, waste incinerators, and glass melting furnaces.
| Items | QG-1.0 | QG-1.1 | QG-1.15 | QG-1.2 | Items |
| SiO2 % | ≥91 | ≥91 | ≥91 | ≥91 | SiO2 % |
| Bulk Density g/cm3 | ≥1.00 | ≥1.10 | ≥1.15 | ≥1.20 | Bulk Density g/cm3 |
| Cold Crushing Strength MPa | ≥2.0 | ≥3.0 | ≥5.0 | ≥5.0 | Cold Crushing Strength MPa |
| 0.1Mpa Refractoriness Under Load °C | ≥1400 | ≥1420 | ≥1500 | ≥1520 | 0.1Mpa Refractoriness Under Load °C |
| Reheating Linear Change (%) 1450°C×2h | 0~+0.5 | 0~+0.5 | 0~+0.5 | 0~+0.5 | Reheating Linear Change (%) 1450°C×2h |
| 20-1000°C Thermal Expansion Coefficient ×10-6℃-1 | 1.3 | 1.3 | 1.3 | 1.3 | 20-1000°C Thermal Expansion Coefficient ×10-6℃-1 |
| Thermal Conductivity (W/(m·K) 350°C±10℃ | ≤0.55 | ≤0.6 | ≤0.65 | ≤0.7 | Thermal Conductivity (W/(m·K) 350°C±10℃ |
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