How to Choose Refractory Bricks That Are Resistant to Strong Alkaline Erosion?

Refractory bricks are a type of refractory material used in high-temperature environments. Different types of refractory bricks have different corrosion resistance properties in different chemical environments. If you need refractory bricks that are resistant to strong alkaline attack, here are a few types to consider:

Alkali-resistant bricks: refractory clay bricks with an alumina content of 25%-28%, which allows alkali to condense on the brick surface and quickly react with the bricks to form a high-viscosity glaze layer, which blocks the alkali from continuing to the inside of the brick body. Channel of erosion, thus preventing alkali cracking. If there is a lot of chlorine in the air, the SiO₂ content in the bricks can be appropriately increased to increase the ability of the brick surface to combine with chlor-alkali and stick together to make alkali-resistant clay bricks that are resistant to chlor-alkali erosion.

Magnesia chrome bricks: They are made of sintered magnesia (magnesium oxide content 89%-92%) and refractory grade chromium bricks as the main raw materials, which are mixed, high-pressure formed, dried, and fired at 1550-1600 degrees. Due to the high impurity content and the silicate bonding between the refractory grains, the fired ordinary magnesia-chrome bricks are also called silicate-bonded magnesia-chrome bricks, or magnesia-chrome bricks for short.

Magnesia brick: Magnesia brick is a type of refractory brick commonly used to withstand alkaline environments. Its main component is magnesium oxide, which has good alkaline tolerance and can resist alkaline erosion. Magnesia bricks are usually divided into different grades, and their specific properties depend on the composition and preparation process.

Chrome bricks: Chrome bricks contain chromium oxide as the main component and have high alkali resistance. These bricks are typically used in highly alkaline environments such as cement kilns, etc.

Alumina bricks: Alumina bricks have good alkali resistance and are usually used in high-temperature furnaces. They have a high aluminum oxide content and are resistant to alkaline attack.

Please note that different industrial applications may require different types of refractory bricks, with selection dependent on working conditions, temperature, chemical environment, and other factors. When selecting refractory bricks, it is recommended to consult with an engineer or materials engineer to ensure that materials are selected that are suitable for the specific application.