Vacuum Oxygen Decarburization (VOD)

The VOD plant is mainly used for the production of stainless steel. The plant is basically designed as a tank degassing plant which is additionally equipped with an oxygen blowing lance and other related equipment. Due to the reduced CO partial pressure under vacuum conditions, decarburisation of high-alloyed steel grades to very low carbon contents is possible

Metallurgical and operational tasks:

  • Vacuum operation possible with varying initial carbon contents
  • High flexibility to use lower cost high carbon alloying materials
  • Low chromium oxidation losses
  • High rate of chromium recovery by slag metallurgy
  • Chemical heating of liquid steel
  • Low final dissolved gas contents
  • Improved steel cleanliness with
  • Achievement of exact compositional values within narrow tolerances