A sliding nozzle apparatus for blowing powdery treating agent in a molten metal vessel, in which a sliding plate consisting of refractory materials is provided with one or more of {HEAD ~ tuyeres} for blowing {TAIL ~ powdery treating agent}, and an upper nozzle consists of a gas permeable ceramic material 
A sliding nozzle apparatus for blowing powdery treating agent in a molten metal vessel , in which a sliding plate consisting of refractory materials is provided with one or more of { HEAD ~ tuyeres } for blowing { TAIL ~ powdery treating agent } , and an upper nozzle consists of a gas permeable ceramic material
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH