What Is Mold Flux?

Mold Flux

Mold flux is a critical component in the continuous casting process of steel. It is a synthetic slag composed of a complex mix of oxides, minerals, and carbonaceous materials, including silica, calcium oxide, sodium oxide, aluminum oxide, and magnesium oxide. Mold flux serves essential functions by lubricating the mold to facilitate the smooth flow of molten steel, controls the heat transfer to ensure uniform solidification, and prevents the formation of surface defects like cracks and oscillation marks. Additionally, mold flux helps to absorb impurities and stabilize the casting processes.