Refractory coatings can be applied to high temperature industrial furnaces, such as linings, protective coatings and sealing coatings. For example, the lining of air supply pipeline in catalytic cracking unit of petrochemical industry can be used as wear-resistant working layer with corundum coating; the protective metal parts are welded with metal anchor parts or anchor mesh on the metal working surface to enhance the adhesion of the contact surface, and then applied to construction, thus raising the working temperature and heat insulation. Oxidation resistant coatings are applied on the long carbon steel long nozzle for continuous casting steel to prevent carbon oxidation.

Smudge construction: first of all, must be protected by the basic surface clean, and maintain the appropriate temperature. In some places, a specific layer of mud is first applied to the base surface, and then the coatings are evenly applied to the base surface in sequence. Before use, the construction body must be naturally dried for a certain time and then roasted to a certain temperature for use.