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Vacuum Degassing (VD)

A vacuum degassing plant has been set up to remove gaseous impurities from the liquid steel. The main process highlights are as under:

  • After placing the ladle in the VD Vessel and sealing the cover processing starts.
     
  • Vacuum is achieved by operating different ejectors with the help of super saturated steam.
     
  • Under vacuum, following "Sievert's Law" the gaseous content in liquid steel decreases, depending on their partial pressure and longevity of treatment.
     
  • Due to Argon Purging under vacuum the non-globular shaped inclusions are arrested to the active basic slag.