Refractory body

Abstract

The invention relates to a refractory body ( 5 ) for use in a protection system for the interior wall ( 1 ) of a furnace. Said body comprises a front face ( 7 ), a rear face ( 8 ) and edge faces ( 11, 12, 13, 14 ) that link the front face ( 7 )to the rear face ( 7 ). The rear face of said refractory body ( 5 ) has at least one groove ( 6 ) for receiving a retaining element ( 4 ), said groove ( 6 ) comprising a first end face ( 6 a ) that opens onto an edge face ( 14 ) and a second end face ( 6 b ) that lies in the interior of the rear face ( 8 ). The groove ( 6 ) has a cross-section that increases from the rear face ( 8 ) towards the front face ( 7 ).

1 . A heat protection body ( 5 ) for a protection system for a furnace inner wall ( 1 ), having a front side ( 7 ), a rear side ( 8 ), and peripheral sides ( 11 ,  12 ,  13 ,  14 ) connecting the front side ( 7 ) and the rear side ( 7 ), 
 a. wherein the heat protection body ( 5 ) has in its rear side ( 8 ) at least one groove ( 6 ) to accommodate a retaining element ( 4 ),    b. wherein the groove ( 6 ) has a first face-side end ( 6   a ) open to a peripheral side ( 14 ) and a second face-side end ( 6   b ) located in the interior of the rear side ( 8 ),    c. wherein the groove ( 6 ) has a cross-section which broadens from the rear side ( 8 ) in the direction of the front side ( 7 ), and    d. wherein the groove cross-section tapers in the longitudinal direction of the groove ( 6 ) inwardly from the peripheral side ( 14 ).    
   
   
       2 . The heat protection body of  claim 1 , wherein the heat protection body ( 5 ) is designed as a plate-shape.  
   
   
       3 . The heat protection body of  claim 1 , wherein the groove cross-section broadens step by step from the rear side ( 8 ) in the direction of the front side ( 7 ).  
   
   
       4 . The heat protection body of  claim 3 , wherein the groove ( 6 ) has a T-shaped cross-section.  
   
   
       5 . The heat protection body of  claim 1 , wherein the groove cross-section broadens constantly from the rear side ( 8 ) in the direction of the front side ( 7 ).  
   
   
       6 . The heat protection body of  claim 5 , wherein the groove ( 6 ) has a trapezoidal cross-section.  
   
   
       7 . (canceled)  
   
   
       8 . The heat protection body of  claim 1 , wherein the heat protection body ( 5 ) is manufactured from a ceramic material, preferably silicon carbide.  
   
   
       9 . The heat protection body of  claim 1 , wherein at least one peripheral side ( 11 ,  12 ,  13 ,  14 ) has a step running essentially parallel to the front side ( 8 ).  
   
   
       10 . The heat protection body of  claim 1 , wherein the rear side ( 7 ) is shaped to the outer contour of the furnace wall ( 1 ).  
   
   
       11 . (canceled)  
   
   
       12 . The heat protection body of  claim 1  in combination with a boiler tube wall ( 1 ) having at least one retaining element ( 4 ) projecting therefrom, wherein: 
 a. the retaining element ( 4 ) has a free end ( 4   a ) corresponding to the cross-section of the groove ( 6 ), and b. the retaining element ( 4 ) is fit within the groove ( 6 ) of the heat protection body ( 5 ).    
   
   
       13 . A heat protection body ( 5 ) for a protection system for a furnace inner wall ( 1 ), the heat protection body ( 5 ) having a front side ( 7 ), an opposing rear side ( 8 ), and peripheral sides ( 11 ,  12 ,  13 ,  14 ) extending therebetween, with a groove ( 6 ) extending inwardly from the rear side ( 8 ) and one of the peripheral sides ( 11 ,  12 ,  13 ,  14 ), wherein the cross-sectional area of the groove ( 6 ) continuously decreases as the groove ( 6 ) extends inwardly from the one of the peripheral sides ( 11 ,  12 ,  13 ,  14 ).  
   
   
       14 . The heat protection body ( 5 ) of  claim 13  wherein the cross-sectional area of the groove ( 6 ) also increases as it extends inwardly from the rear side ( 8 ).  
   
   
       15 . The heat protection body ( 5 ) of  claim 14  wherein the groove ( 6 ) defines a T-shape in the one of the peripheral sides ( 11 ,  12 ,  13 ,  14 ).  
   
   
       16 . The heat protection body ( 5 ) of  claim 13  wherein the thickness of the heat protection body ( 5 ) between the groove ( 6 ) and the rear side ( 8 ) increases as the groove ( 6 ) extends inwardly from the one of the peripheral sides ( 11 ,  12 ,  13 ,  14 ).  
   
   
       17 . The heat protection body ( 5 ) of  claim 16  wherein the groove ( 6 ) defines a T-shape in the one of the peripheral sides ( 11 ,  12 ,  13 ,  14 ).  
   
   
       18 . A heat protection body ( 5 ) for a protection system for a furnace inner wall ( 1 ), the heat protection body ( 5 ) having a front side ( 7 ), an opposing rear side ( 8 ), and peripheral sides ( 11 ,  12 ,  13 ,  14 ) extending therebetween, with a groove ( 6 ) extending inwardly from the rear side ( 8 ) and one of the peripheral sides ( 11 ,  12 ,  13 ,  14 ), wherein: 
 a. the groove ( 6 ) defines a T-shape in the one of the peripheral sides ( 11 ,  12 ,  13 ,  14 );    and    b. the thickness of the heat protection body ( 5 ) between the groove ( 6 ) and the rear side ( 8 ) continuously increases as the groove ( 6 ) extends inwardly from the one of the peripheral sides ( 11 ,  12 ,  13 ,  14 ).