Light Weight Fire Clay Brick
What is Light Weight Fire Clay Brick for Boiler
Light weight fire clay brick is a kind of quality refractory insulation materials for all kinds of industrial kiln application with various excellent properties of high strength, even bulk density, low thermal conductivity and low impurity. Which is made of fire-clay grog as the raw material and plastic clay as the binding agent then adding suitable combustible or foaming agent through firing. Its apparent porosity is high about 40~85% and bulk density is lower than 1.5 g/cm3. Light Weight Fire Clay Bricks are mainly used as insulation materials in industrial kiln to reduce heat loss of kiln, save energy and lighten the quality of thermal equipment.
Light Weight Fire Clay Brick for Boiler Process
Light weight fire clay brick for Boiler is argillaceous product with about 30~40% Al2O3 content. Its main mineral composition includes kaolinite (Al2O3·2SiO2·2H2O) and 6~7% impurities (K, Na, Ca, Ti, Fe oxide). The firing process of fire clay bricks kaolinite produce mullite crystal through constant dehydration and decomposition SiO2 and Al2O3 together with impurities that contained in the fire clay brick form low-melting-point silicate in the process of firing.
Specification of Light Weight Fire Clay Brick for Boiler
| Product Index | PZ-1.0 |
| Al₂O₃ (%) ≥ | 42 |
| Fe₂O₃ (%) ≤ | 3.0 |
| Bulk density (g/cm³) ≤ | 1.2 |
| Cold crushing strength (MPa) ≥ | 10 |
| Refractoriness (℃) ≥ | 1650 |
| Refractoriness under load 0.1MPa (℃) ≥ | 1250 |
| Reheating Linear Change, 1150℃×2h (%) ≤ | 0.6 |
Application of Light Weight Fire Clay Brick for Boiler
Light weight fire clay brick for Boiler as power plant boiler refractories mainly used for heat insulation wall building, because of light weight, low thermal conductivity and high refractoriness.
