粘土耐火磚是指Al2O3含量為30%-40%硅酸鋁材料的粘土質(zhì)制品。粘土耐火磚就地取材，價(jià)格便宜，經(jīng)久耐用，還防火、隔熱、隔聲、吸潮等優(yōu)點(diǎn)，在土木建筑工程中使用廣泛。
粘土耐火磚按用途劃分，主要分為高爐用粘土耐火磚，熱風(fēng)爐用粘土耐火磚，玻璃窯用大型粘土耐火磚。
粘土耐火磚應(yīng)用范圍：
由于粘土磚的荷重軟化溫度低，在高溫下產(chǎn)生收縮，導(dǎo)熱性能比硅磚小15%-20%，機(jī)械強(qiáng)度也比硅磚差，所以，粘土磚只能用于焦?fàn)t的次要部位，如蓄熱室封墻，小煙道襯磚及蓄熱室格子磚、爐門(mén)襯磚、爐頂以及上升管襯磚等。
Clay refractory brick is a kind of clay product with 30% - 40% alumina content. Clay refractory brick is widely used in civil engineering due to its local materials, low price, durability, fire prevention, heat insulation, sound insulation, moisture absorption and other advantages.
According to the use of clay refractory brick, it is mainly divided into clay refractory brick for blast furnace, clay refractory brick for hot blast stove and large clay refractory brick for glass kiln.
Application scope:
Due to the low softening temperature of clay brick under load and shrinkage at high temperature, the thermal conductivity of clay brick is 15% - 20% less than that of silica brick, and the mechanical strength is also worse than that of silica brick. Therefore, clay brick can only be used in the secondary parts of coke oven, such as regenerator wall sealing, small flue lining brick and regenerator lattice brick, furnace door lining brick, furnace top and riser lining brick, etc.
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