Insulation Bricks
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Silica Insulation Brick

Main Composition: SiO2≥89%
Application: Industrial Furnaces and Equipment
Raw Material: Silica Sand
Color: Yellow
Bulk Density: 0.6g/cm³~1.2g/cm³
Refractoriness: ≥1600℃
Capacity: 1000 MT per month
Package: Export wooden pallets and polyboard
Introduction:
Silica insulation brick refers to a kind of refractory products made from silica as the main material and with SiO2 content not less than 91%.The main mineral composition of silica insulation brick is phosphorite and cristobalite.
 
Features:
1.High refractoriness under load. 
2.Energy-saving. 
3.Less heat radiation loss. 
4.Low thermal conductivity.
 
Application:
Silica insulation brick has excellent fire resistance, with only small residual expansion, and good thermal stability. They are suitable for industrial furnaces such as coke ovens, hot blast furnaces, glass furnaces, and carbon furnaces.
 
Technical Data:
Item CNLS-1.2 CNLS-1.0 CNLS-0.8 CNLS-0.6
SiO2(%) 92 92 90 89
Fe2O3(%) 0.60 0.57 0.52 0.62
CaO(%) 2.5 2.7 3.0 3.3
Bulk Density(g/cm³) 1.2 1.0 0.8 0.6
Cold Crushing Streng(Mpa) 5.0 4.5 3.0 2.5
Refractoriness(℃) 1640 1620 1610 1600
Linear Change(%) 1480℃*2h±0.5 1450℃*2h±0.5 1400℃*2h±0.5 1350℃*2h±0.5
Thermal Conductivity
(W/m•k)
400℃ 0.36 0.30 0.26 0.22
600℃ 0.39 0.33 0.29 0.25
800℃ 0.41 0.36 0.31 0.28
1000℃ 0.44 0.39 0.34 0.31
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