What is the composition of alkali resistant bricks?

Alkali resistant bricks, also known as anti-alkali bricks, are a type of special refractory brick that can resist the erosion and corrosion of alkali substances at high temperatures. The composition of alkali resistant bricks includes the following materials:

1.SiO2: Silica (SiO2) is the main component of alkali resistant bricks, accounting for 60% to 80% of the total mass. It is the key material that provides the acid resistance and thermal stability of the bricks.

2.Al2O3: Aluminum oxide (Al2O3) is another important component of alkali resistant bricks, usually accounting for 10% to 30% of the total mass. It contributes to the mechanical strength and thermal shock resistance of the bricks.

3.Other components: Other materials may be added to adjust the properties and performance of the bricks. For example, magnesia (MgO) can improve the slag resistance and thermal conductivity of the bricks, while zirconia (ZrO2) can improve the thermal shock resistance and high-temperature strength of the bricks.

In addition, alkali resistant bricks may also contain small amounts of metal oxides such as Cr2O3, Fe2O3, and CaO, which can enhance their chemical resistance and high-temperature performance.

Overall, the precise composition and proportion of each component in alkali resistant bricks depend on the specific application requirements and manufacturing process of the bricks.