Corrosion resistance of refractories. The corrosion resistance of refractory material refers to the reliability and service life of refractory raw materials, products and components in use. The Russian researchers have made a systematic study on the cause of the damage of refractory material and the way to improve it, and illustrated the maximum service life of various industrial kilns by using optimized design of refractory materials. Damage of refractories is divided into 8 basic types: (1) caused by chemical corrosion of refractories and slag, molten metal or other melt, ash, gas and so on (about the whole damage amount of 70%); (2) the temperature fluctuation caused by thermal spalling (about the damage the amount of 20%); (3) multi crystal transformation and loose structure caused by thermal expansion; (4) using the temperature exceeds the melting point or softening caused by refractory degree; (5) 70% 50% temperature reaches the melting temperature of the thermoplastic damage; (6) the machinery made of molten metal erosion damage; (7) refractory material in the gas phase medium or vacuum distillation; (8) by mechanical wear of solid workpiece heating of refractory materials.

The main way to improve the anti damage of refractory material is: (1) improve the chemical stability of the components of materials to improve the slag resistance; (2) increase the refractory phase compositions and improve the sintering temperature of refractory products can limit the thermoplastic damage; (3) improve the densification of fire resistance the use of materials and components of high thermodynamic stability to reduce the refractory material sublimation; (4) high hardness crystalline material into cross growth in the organizational structure of the refractories can improve the ability to resist the erosion of molten metal; (5) the use of materials of high wear resistance can be solved by a solid workpiece heating on fire the mechanical wear of materials. With the optimized design of refractory materials, some industrial kilns have reached their maximum service life.