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Silica Insulation Bricks

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.

Feature of Light Weight Silica Insulation Bricks:

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.

Application of Light Weight Silica Insulation Brick

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.

Light Weight Silica Insulation Brick Description

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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