Molten metal feed nozzle

Abstract

A nozzle end is provided with an extension 11 which has a lower portion immersed in a molten metal pool and extends toward a side weir 2 such that a stagnation area disappears on a free liquid surface of molten metal. The extension 11 is in the form of a quadrangular pyramid lying sidelong and is converged to a point P 1 extremely close to the side weir 2. According to this molten metal feed nozzle, a stagnation area on a free liquid surface of molten metal is displaced by the extension 11 contiguous with the nozzle end to suppress generation of an unwanted solidification shell. Thus, no unwanted solidification shell is pinched as foreign matter by solidification shells generated on outer peripheries of chilled rolls 1 for production of a strip and break of a strip derived from enlargement of nip between the rolls can be averted.

1 . A molten metal feed nozzle positioned above a nip between rolls of a twin roll caster and having ends spaced apart from side weirs, comprising extensions each contiguous with the nozzle end and extending toward the side weir such that a stagnation area disappears on a free liquid surface of molten metal. 
   
   
       2 . A molten metal feed nozzle as claimed in  claim 1 , wherein the extension is converged toward the side weir. 
   
   
       3 . A molten metal feed nozzle as claimed in  claim 1 , wherein the extension is converged to a point extremely close to the side weir.