Mold flux is a material used in continuous steel casting, placed on the surface of molten steel within the mold to provide thermal insulation, prevent oxidation, and absorb non-metallic inclusions. Mold flux performs five key functions in the continuous casting mold: thermal insulation, oxidation prevention, lubrication, improvement of heat transfer, and inclusion absorption. This product ensures stable and smooth continuous casting operations and enhances the surface and subsurface quality of the cast billet by providing insulation, lubrication, and other functions.