Pouring nozzle

Abstract

The invention relates to a pouring nozzle. Such pouring nozzle may be used for the transfer of a metal melt from one (upper) metallurgical vessel to a second (lower) metallurgical vessel, for example for the transfer of a steel melt from a ladle to a tundish.

1 . Pouring nozzle made of at least one refractory material and comprising a tubular member ( 10   t ,  12   t ) defining a first part of a pouring channel ( 14 ) and a plate like member ( 10   p ,  12   p ), integral with said tubular member ( 10   t ,  12   t ) and projecting from the tubular member ( 10   t ,  12   t ) along its periphery at one end, said plate like member ( 10   p ,  12   p ) having an orifice defining a second part of said pouring channel ( 14 ) and a flat surface ( 10   s ,  12   s ) at its free end, which flat surface ( 10   s ,  12   s ) running perpendicular to a longitudinal axis (L) of said pouring channel ( 14 ), at least part of the plate like member ( 10   p ,  12   p ) and/or of the tubular member ( 10   t ,  12   t ) being encapsulated by a metallic envelope ( 16 ), wherein at least one stiffening element ( 10   pm ,  12   pm ) is arranged within the refractory material of said plate like member ( 10   pm ,  12   p ), between said plate like member ( 10   p ,  12   p ) and the metallic envelope ( 16 ) or protruding from said metallic envelope ( 16 ) into the said plate like member ( 10   p ,  12   p ). 
   
   
       2 . Pouring nozzle according to  claim 1 , comprising two stiffening elements ( 10   pm ,  12   pm ), arranged at opposite sides of said plate like member ( 10   p ,  12   p ). 
   
   
       3 . Pouring nozzle according to  claim 1 , wherein the stiffening element has the shape of a rod. 
   
   
       4 . Pouring nozzle according to  claim 1 , wherein the stiffening element has the shape of a helical spring. 
   
   
       5 . Pouring nozzle according to  claim 1 , wherein the stiffening element has the shape of a ring. 
   
   
       6 . Pouring nozzle according to  claim 1 , wherein the stiffening element ( 10   pm ) is part of the envelope ( 16 ), which stiffening element ( 10   pm ) protrudes from the inner wall of said envelope into said refractory material of said plate like member ( 10   p ). 
   
   
       7 . Pouring nozzle according to  claim 1 , wherein the stiffening element ( 12   pm ) is arranged such that one of its surfaces forms part of the flat surface ( 12   s ) of the plate like member ( 12   p ). 
   
   
       8 . Pouring nozzle according to  claim 7 , wherein the stiffening element ( 12   pm ) is arranged at the outer periphery of the flat surface ( 12   s ) of the plate like member ( 12   p ). 
   
   
       9 . Pouring nozzle according to  claim 1 , wherein chamfered surface sections of said plate like member opposite its flat surface form an angle α between 20 and 85° with the longitudinal axis (L) of the pouring channel. 
   
   
       10 . Pouring nozzle according to  claim 9 , wherein part(s) of the stiffening element(s) form part of the said chamfered surface sections ( ). 
   
   
       11 . Pouring nozzle according to  claim 1 , comprising a second refractory zone ( 18 ) between the envelope ( 16 ), the stiffening element(s) ( 10   pm ) and the plate like member ( 10   p ). 
   
   
       12 . Pouring nozzle according to  claim 11 , where a shock absorbing interface zone (S) is arranged between zone ( 18 ) and plate like member ( 10   p ) and made from a refractory material, which becomes deformable at temperatures experienced during use of said pouring nozzle. 
   
   
       13 . Pouring nozzle according to  claim 1 , comprising at least one metallic stiffening element ( 10   pm ,  12   pm ). 
   
   
       14 . Pouring nozzle according to  claim 1 , comprising at least one high density ceramic stiffening element ( 10   pm ,  12   pm ).