Siphon ladle for the magnesium treatment of cast iron melts used for the production of nodular graphite cast iron including a cover which can be clamped or screwed.

Similar to ladles for standard sandwich processes, there is a chamber at the bottom of the ladle which can hold master alloys. The iron to be treated is filled in through the siphon, which is a ceramic pipe, it rises and floods the chamber with treatment alloy. The chamber wall must be higher than the siphon opening at the ladle bottom. The advantage of this process is a constant magnesium yield at high rates. Moreover, the generation of Mg vapor is mostly eliminated.

Additional references:
Inmold method
Georg Fischer converter process
Tundish cover process
Magnesium fading
Residual magnesium content