Industry Knowledge of Electrically Fused-Rebonded Magnesia Chrome Brick

As a high-quality refractory material, electrically fused-rebonded magnesia chrome brick is widely used in various high-temperature industrial furnaces, such as cement kilns, steelmaking furnaces, non-ferrous metal smelting furnaces, and glass kilns. It has excellent performance in resisting high-temperature erosion and corrosion, thermal shock resistance, and long service life.

electrically fused-rebonded magnesia chrome brick can be classified into different grades according to different technical parameters. Generally, it includes three grades: high-grade, medium-grade, and low-grade. High-grade electrically fused-rebonded magnesia chrome brick has a higher content of magnesia chrome spinel and better compactness, which can withstand a higher temperature and harsher environment. The medium and low-grade electrically fused-rebonded magnesia chrome bricks have a relatively lower content of magnesia chrome spinel, and their performance is suited for moderate or mild working conditions.

The technical parameters of electrically fused-rebonded magnesia chrome brick include bulk density, apparent porosity, compressive strength, thermal conductivity, and thermal expansion coefficient. The difference in these technical parameters will directly affect the performance of the brick in high-temperature furnaces. For example, high bulk density means better erosion resistance and thermal shock resistance, while low apparent porosity means less heat loss, and so on.

To produce electrically fused-rebonded magnesia chrome brick, high-purity magnesia and chrome ore are melted in an electric arc furnace, and then quickly cooled to form a dense and uniform solid. After that, the solid block is crushed, screened, and ground into the required shape and size. During the production process, some additives, such as antimony oxide, boron oxide, and silicon carbide, may be added to improve the performance of the brick.

In conclusion, electrically fused-rebonded magnesia chrome brick is a vital refractory material in high-temperature industries. Its grade classification, technical parameters, and production process are crucial factors that determine its performance in harsh working environments. The continuous advancement of technology and the development of new additives will further improve the performance and service life of electrically fused-rebonded magnesia chrome brick.