Patents Assigned to Mefos, Stiftelsen For Metallurgisk Forskning
  • Nozzle and method of blowing hot metal
    Patent number: 5746970
    Abstract: An annular nozzle for an oxygen lance, e.g. an oxygen lance for blowing steel in a converter, gives an annular hot spot on the liquid steel in the converter. When exiting the nozzle, the annular jet has disruptions that result in ambient atmosphere being sucked towards the center of the annular jet. Thus, a sub-pressure is prevented which would otherwise prevent the jet from diverging conically. In one embodiment, the nozzle can be switched during a blowing operation between forming a tight jet and forming a divergent jet.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: May 5, 1998
    Assignee: Mefos, Stiftelsen For Metallurgisk Forskning
    Inventors: Dan Bergman, Takeo Inomoto