Quick pump down and pressure control in vacuum steel degassing

  • W. Burgmann


Steelmakers who want to go for quality improvement by vacuum treatment in secondary metallurgy often have
only a rough idea regarding the kind of vacuum pump to be selected, the needed suction capacity, the pump down
time and the essential selection criteria. For both kinds of vacuum pumps, Steam Ejector Vacuum Pumps (SVP)
or dry operating Mechanical Vacuum Pumps (MVP) a lot of information has been given in the recent literature
[1-5] such that the choice of suction capacity can be made according to the kind of vacuum process used and the
metallurgical possibilities of the RH- or the VD-process.