Improving the erosion resistance of clay bricks can be started from the following aspects:

I. Improving the purity of raw materials

By improving the purity of raw materials and reducing the content of low melting point and impurities, the erosion resistance of clay bricks can be significantly enhanced. For example, reducing the content of impurities such as Fe₂O₃ can reduce the oxidation and erosion of bricks at high temperature.

II. Optimizing chemical composition

Increasing Al₂O₃ content can improve the erosion resistance of clay brick. The higher the Al₂O₃ content, the stronger the alkali resistance and acid corrosion resistance of brick. In addition, by adding high alumina clay, bentonite and other components, the chemical mineral composition of brick can be improved and its corrosion resistance can be enhanced.

III. Reducing porosity

Reducing the porosity of clay bricks, especially the apparent porosity, can reduce the penetration of corrosive media, thus improving the erosion resistance. For example, the apparent porosity of clay bricks with low porosity can be reduced to below 12% by high-pressure molding and high-temperature sintering, which significantly improves the corrosion resistance.

IV. Improving the production process

Adopting high-pressure forming and high-temperature sintering technology can improve the compactness and strength of bricks, thus enhancing the corrosion resistance. In addition, the plasticity and formability of clay can be improved by steam heating, and then the corrosion resistance of brick can be improved.

V. Surface treatment

Surface treatment of clay brick, such as vacuum phosphoric acid impregnation and secondary low temperature firing, can further improve the corrosion resistance of brick. This treatment can enhance the surface strength and compactness of brick and reduce the penetration of corrosive media.

VI. Adding modifiers

Adding appropriate modifiers, such as ZrO₂ and Cr₂O₃, to clay brick can improve the corrosion resistance of brick. These modifiers can form a protective layer on the surface of brick to prevent the penetration of corrosive media.

VII. Choosing the Right Binder

The corrosion resistance of clay brick can be improved by using suitable binder. For example, phosphate binder can form a dense protective layer on the surface of brick to reduce the erosion of corrosive media.

Through the above methods, the corrosion resistance of clay brick can be effectively improved, its service life can be prolonged and its performance in high temperature and corrosive environment can be improved.