Casting powder, also known as mold powder or flux, is a crucial material used in the continuous casting process of steel production. It is applied to the surface of the molten steel to form a protective layer, prevent heat loss, and improve surface quality. Casting powder also helps control the solidification process, reduce defects, and enhance the overall efficiency of the casting operation. Its composition typically includes a blend of oxides, minerals, and additives tailored to specific casting requirements.