Cooling plate

Abstract

The invention relates to a cooling plate ( 1, 101 ) for a shaft furnace provided with a refractory lining. Said shaft furnace comprises a first laminated cooling plate element ( 2, 102 ) which is oriented towards the inside of the furnace (O i ), a second laminated rear cooling plate element ( 3, 103 ) which is welded to the first element, a cooling channel ( 7, 107 ) arranged between the first and second cooling plate elements, and tube sections ( 8, 9 ) to the cooling agent inlet or the cooling agent outlet. The aim of the invention is to improve the production, flow and cooling properties. To this end, the first cooling plate element ( 2, 102 ) is embodied in the form of a bloom having a plane front side ( 14 ) facing the inside of the furnace (O 1 ), and the cross-sectional surface of the cooling channel is larger than in the central region ( 20; 120 ), in relation to the longitudinal extension of the cross-section in the end regions ( 18, 19; 118, 119 ). The invention also relates to a cooling plate system ( 33 ).

1 . Cooling plate ( 1 ,  101 ) for refractory-lined shaft furnaces, 
 with a first cooling plate element ( 2 ,  102 ) facing the inside (O i ) of the furnace and a second, rear cooling plate element ( 3 ,  103 ), which are welded together,    with a cooling channel ( 7 ,  107 ) formed between the first and the second elements of the cooling plate, and    with pipe sections ( 8 ,  9 ) connected to the coolant inlet and coolant outlet,    characterized by the fact that the first cooling plate element ( 2 ,  102 ) is designed as a bloom with a plane front side ( 14 ) facing the inside (O i ) of the furnace, and that the cross-sectional area of the cooling channel is larger in the end regions ( 18 ,  19 ;  118 ,  119 ) than in the center region ( 20 ;  120 ), as viewed along the longitudinal extent of the cross-section.    
     
     
         2 . Cooling plate in accordance with  claim 1 , characterized by the fact that the end regions ( 18 ,  19 ;  118 ,  119 ) bulge out on one or both sides.  
     
     
         3 . Cooling plate in accordance with  claim 1  or  claim 2 , characterized by the fact that, on its side facing the furnace interior (O i ), the cooling channel cross section is formed by the first cooling plate element ( 2 ) with at least two recesses ( 16 ,  17 ) that run along its rear side ( 5 ).  
     
     
         4 . Cooling plate in accordance with any of  claims 1  to  3 , characterized by the fact that the cooling channel cross section is formed on its rear side by a second cooling plate element ( 103 ) that has an at least double trough-like shape with bulges that project towards the furnace wall.  
     
     
         5 . Cooling plate in accordance with  claim 3 , characterized by the fact that the cooling channel cross section is formed on the rear side by a more or less plane second cooling plate element ( 3 ).  
     
     
         6 . Cooling plate in accordance with  claim 4  or  claim 5 , characterized by the fact that the edge region ( 324 ,  325 ) of the second cooling plate element ( 103 ) is formed thicker than its center region.  
     
     
         7 . Cooling plate in accordance with any of  claims 1  to  6 , characterized by the fact that the second cooling plate element ( 3 ,  103 ) is welded by its longitudinal edges to the rear side ( 5 ) of the first cooling plate element ( 2 ,  102 ).  
     
     
         8 . Cooling plate in accordance with  claim 7 , characterized by the fact that the second cooling plate element ( 3 ) is welded to the rear side of the first cooling plate element ( 2 ) at some distance from the edges ( 2   a, b ) of the first cooling plate element, and that at least one slit ( 31 ) is produced in the edges regions ( 2   a, b ) of the first cooling plate element ( 2 ) perpendicularly to the longitudinal axis of the cooling plate.  
     
     
         9 . Cooling plate in accordance with any of  claims 3  to  8 , characterized by the fact that the pipe sections ( 8 ,  9 ) for the coolant intake and discharge extend through bores in the second cooling plate element ( 3 ) at the rear of the cooling plate, and that, at the level of these pipe sections ( 8 ,  9 ), the first cooling plate element ( 2 ) is hollowed out, and the depth of the hollow ( 39 ) was intended] decreases in ramp-like fashion towards the cooling channel recesses ( 16 ,  17 ).  
     
     
         10 . Cooling plate in accordance with any of  claims 1  to  9 , characterized by the fact that the cooling plate ( 1 ,  101 ) has at least two suspension points ( 34 ,  38 ) for mounting the cooling plate on the furnace wall ( 10 ) of the shaft furnace, such that a first suspension point ( 34 ) is designed as a fixed connection in the upper part of the cooling plate, and a second suspension point ( 38 ) is designed as a loose connection in the lower part of the cooling plate.  
     
     
         11 . Cooling plate in accordance with  claim 10 , characterized by the fact that the first suspension point ( 34 ) comprises a screw connection as the fixed connection, and that the second suspension point ( 38 ) comprises a hung connection as the loose connection.  
     
     
         12 . System ( 33 ) for cooling refractory-lined shaft furnaces, which comprises a large number of cooling plates ( 1 ,  101 ) of the types specified in  claims 1  to  11 , which are made of rolled copper or a rolled copper alloy and are installed side by side or in an overlapping fashion.