China Professional Magnesia Carbon Bricks manufacturers and suppliers

Since phenolic resin has a high carbon residue rate and good affinity with magnesia and graphite, it is easy to combine magnesia and graphite and is easy to spread in magnesia and graphite at room temperature. Therefore, phenolic resin is still the most popular product in production today. Magnesia carbon brick is a good binder.

Since magnesia carbon bricks use high-purity graphite, the amount of liquid phase generated in the bricks is small, and oxygen easily penetrates into the bricks to oxidize and decarbonize the graphite. The oxidation resistance of the bricks becomes worse. For this reason, metals such as Al, Si, and Al-Si must be added. , Al-Mg alloy, SiC and other antioxidants. They can react with oxygen preferentially to form chars or oxides, and expand in volume, blocking or filling pores to densify the bricks, thus improving the oxygen resistance ratio of refractory bricks.