Sliding nozzle apparatus for blowing powdery treating agent
Method for cooling tuyeres Patent #: 4330108
ApplicationNo. 06/308701 filed on 10/05/1981
US Classes:266/268, Having plural outlets266/243, Bessemer-type treating vessel266/47Tuyere operation
ExaminersPrimary: Rosenberg, Peter D.
Attorney, Agent or Firm
International ClassesB22D 1/00 (20060101)
C21C 5/48 (20060101)
AbstractA method and apparatus for treating molten metal in a bottom pour vessel through a pouring opening controlled by a slidable gate closure member. A dual concentric tuyere having a central conduit and an outer annular conduit is positioned in the pouring opening of the vessel. Treating material is injected into the molten metal through the central conduit of the tuyere and a coolant is passed through the outer annular conduit of the tuyere. After completion of the treatment, oxygen is blown through both the central conduit and the annular conduit to burn back the tuyere, opening the nozzle well for pouring.
Field of SearchPROCESS