Gas flushing device for metallurgical melting pots

Abstract

The invention relates to a gas flushing device for metallurgical melting pots, having the following construction: a porous plug is arranged in an upper cylindrical housing at the gas outlet end thereof and in a lower cylindrical housing on the adjacent section thereof, an annular chamber is provided at least between the lower housing and the porous plug which is filled with a mass, whereby the porous plug, housings and mass are made from a refractory ceramic material.

1 . A gas purging device for metallurgical melting vessels with the following characterstics: 
 1.1 a gas purging brick ( 12 ) is arranged in an upper cylindrical receptacle ( 18 ) with its end ( 12   o ) on the gas outlet side and in a lower cylindrical receptacle ( 10 ) with its adjacent section ( 12   u ), and    1.2 an annular space provided at least between the lower receptacle ( 10 ) and the gas purging brick ( 12 ) is filled with a mass ( 16 ), wherein    1.3 the gas purging brick ( 12 ), the receptacles ( 10 ,  18 ) and the mass ( 16 ) are made of a refractory ceramic material.    
   
   
       2 . The gas purging device according to  claim 1 , the gas purging brick ( 12 ) of which is arranged in the upper receptacle ( 18 ) flush or with slight clearance.  
   
   
       3 . The gas purging device according to  claim 1 , the gas purging brick ( 12 ) of which extends over the entire height of the lower and the upper receptacle ( 10 ,  18 ).  
   
   
       4 . The gas purging device according to  claim 1 , the gas purging brick ( 12 ) of which has a circular cross section.  
   
   
       5 . The gas purging device according to  claim 1 , wherein at least one receptacle ( 10 ,  18 ) is realized in the form of a pressed part.  
   
   
       6 . The gas purging device according to  claim 1 , the gas purging brick ( 12 ) of which has a directed porosity.  
   
   
       7 . The gas purging device according to  claim 1 , the gas purging brick ( 12 ) of which comprises several small metal or ceramic tubes ( 20 ) that extend in the axial direction and serve for achieving a directed porosity.  
   
   
       8 . The gas purging device according to  claim 1 , the upper receptacle ( 18 ) of which is at least as long as the lower receptacle ( 10 ).  
   
   
       9 . The gas purging device according to  claim 1 , the upper receptacle ( 18 ) of which is 1.1-times to 10-times as long as the lower receptacle ( 10 ).  
   
   
       10 . The gas purging device according to  claim 1 , the upper receptacle ( 18 ) of which is 2-times to 3-times as long as the lower receptacle ( 10 ).  
   
   
       11 . The gas purging device according to  claim 1 , the upper receptacle ( 18 ) of which has an outside cross section that is larger than the inside cross section of the lower receptacle ( 10 ).  
   
   
       12 . The gas purging device according to  claim 1 , wherein the upper receptacle ( 18 ) lies on the lower receptacle ( 10 ).  
   
   
       13 . The gas purging device according to  claim 1 , the upper receptacle (I  8 ) of which has an outside cross section that is smaller than the outside cross section of the lower receptacle ( 10 ).  
   
   
       14 . The gas purging device according to  claim 1 , wherein the upper receptacle ( 18 ) protrudes into the lower receptacle ( 10 ).  
   
   
       15 . The gas purging device according to  claim 1 , the mass ( 16 ) of which is a ramming mass.  
   
   
       16 . The gas purging device according to  claim 1 , wherein at least one of the receptacles ( 10 ,  18 ) comprises more than one part.  
   
   
       17 . Use of a gas purging device according to  claim 1 , for installation in the bottom (H) of a metallurgical melting vessel.  
   
   
       18 . Use of a gas purging device according to  claim 1 , for installation in the hearth bottom (H) of an electric furnace.