Tundish powder Tundish flux or powder provides multiple functions. Firstly it insulates the molten steel both thermally (preventing excessive heat loss) and chemically (preventing air entrainment & reoxidation). The quality of the flux being used also play vital role, such as nitrogen pick-up was reported to be reduced from 16ppm to 5ppm, from ladle to mould by changing tundish flux with lower SiO2 content, in one of South American steel works. Secondly, in ideal circumstances, the flux also absorbs inclusions to provide additional steel refining.
