Cooling element for shaft furnaces

Abstract

The invention relates to a cooling element for shaft furnaces, comprising an area ( 8 ) which is cross-flown by a cooling agent, resulting from an arrangement of at least one channel ( 9 ) which conveys a cooling agent internally and which leads into tubular elements ( 3,4 ) for feeding and discharging said coolant which are joined to the coo ling element ( 1,2 ), in addition to comprising edge areas with improved cooling properties. The respective channel conveying the cooling agent extends beyond the area where the tubular elements lead into the edge area at cooling agent feed and/or discharge level and has an expanded diameter in comparison with that of the internal channel ( 9 ), a guiding element ( 14 ) partially dividing the channel section ( 13 ) in the direction of flow in order to guide the cooling agent into the edge area of the cooling element and return said agent counter to the direction of said flow.

1 . Cooling element for shaft furnaces 
 with an area ( 8 ) through which coolant flows as a result of the arrangement of at least one internal coolant-carrying channel ( 9 ), which leads to coolant feed and discharge pipes ( 3 ,  4 ) connected to the cooling element ( 1 ,  2 ) and    with edge areas,    characterized in that 
 at the end of the element where the coolant enters and/or exits, the coolant-carrying channel in question extends beyond the opening of the pipe and into the edge area of the cooling element and has a cross section which is larger than that of the cross section of the internal channel ( 9 ), this cooling section ( 13 ) being provided with a guide element ( 14 ), which divides the channel lengthwise in the flow direction so that the coolant is guided to the edge area of the cooling element and then back again in the opposite direction.  
   
     
     
         2 . Cooling element according to  claim 1 , characterized in that the edge area, including the associated cooling section ( 13 ) with the guide element ( 14 ), is designed as at least one separate endpiece, which is attached to the base body ( 8 ) with the internal cooling channels ( 9 ).  
     
     
         3 . Cooling element according to  claim 2 , characterized in that the separate endpiece ( 12 ) is designed as a casting or as a welded construction and is welded to the base body.  
     
     
         4 . Cooling element according to one of claims  1 - 3 , characterized in that the cross-sectional dimension of the channel section ( 13 ) is approximately twice that of the cooling channel ( 9 ) in the base body ( 8 ), and in that the guide element is arranged so that it divides the channel section ( 13 ) into two cooling channels with corresponding dimensions.  
     
     
         5 . Cooling element according to one of claims  1 - 4 , characterized in that the separate endpiece ( 12 ) is provided on the side facing the steel jacket of the furnace with at least one bore, into which the open end of the associated coolant feed or discharge pipe ( 3 ,  4 ) is introduced and welded.  
     
     
         6 . Cooling element according to one of claims  1 - 5 , characterized in that it comprises 
 a base body ( 8 ) consisting of at least two extruded or rolled sections which are welded together, through which element at least one cooling channel ( 9 ) passes, and    endpieces ( 12 ), the number of which corresponds to the number of sections, the endpieces being welded to the top or bottom of the sections.