What is the difference between clay bricks and three-level high alumina bricks?

粘土磚和高鋁磚的主要區別在於鋁含量和容重。

含鋁量為 40-48% 的磚是粘土磚。 粘土磚在國家標準中有N-1、N-2、N-3、N-4的不同指標。 在生產和使用上，N-2、N-3粘土磚應用廣泛，也是很多廠家生產的常用產品。 體積密度在2.1-2.15之間。 以N-1粘土磚為例，有些指標高於三級高鋁磚。

Bricks with 55% aluminum content are third-grade high-alumina bricks with a bulk density between 2.15-2.25. At present, due to the production area and raw materials, the aluminum content of clay bricks is about 56%. The aluminum content of the clay bricks in Xinmi, Henan is about 56%, and the body density is above 2.15, which is basically a third-grade high-alumina brick. Moreover, the firing temperature is high, and the chemical index is not lower than the third-grade high alumina brick, but there is a difference in the softening temperature of the load.

The aluminum content of the three-level high alumina bricks currently produced is about 63%, and some have 65%. The body density is above 2.25, and the load softening temperature is slightly lower. In terms of chemical indicators, it is only different from the second grade high alumina bricks in unit weight and load softening temperature.

粘土磚和三級高鋁磚的外觀顏色還是有區別的。 粘土磚為紅黃色，三級高鋁磚為白色和黃色。

粘土磚與三級高鋁磚在重量上存在差異。 同一種磚型粘土磚比三級高鋁磚輕。 燒製溫度也低20-30°C。

粘土磚與三級高鋁磚的抗壓強度和荷重軟化溫度不同。 粘土磚的抗壓強度為40Mpa，而三級高鋁磚的抗壓強度為50Mpa。 粘土磚的軟荷載也高於三級。 鋁磚的耐火度為30-40℃，其耐火度低30℃左右。