Lining of the cone of a converter

Abstract

A lining at the restriction part of a converter capable of more suppressing the falling of bricks than before even if the bricks at the restriction part are stack aslant and increasing a workability at the time of installation, wherein the shell of the converter at the restriction part is lined with firebricks by tilt stacking to protect the restriction part against melting by hot molten steel and slag, a projectedly bent locking part is provided on the upper and lower surfaces of the firebricks, and the locking part on the lower surface of the firebrick stacked on an upper side is overlapped with the locking part on the upper surface of the firebrick stacked on a lower side.

1 . A lining for the cone of a converter, which is composed of firebricks lined on the shell of the cone of a converter obliquely and prevents erosion by high-temperature molten steel and slag, wherein 
 a projecting bent engagement portion is formed on the top and bottom surfaces of the above firebricks so that the engagement portion on the bottom surface of an overlying firebrick and the engagement portion on the top surface of an underlying firebrick are engaged with each other.    
     
     
         2 . The lining for the cone of a converter according to  claim 1 , wherein the top surface and the bottom surface of the firebrick are perpendicular to the surface of the shell.  
     
     
         3 . The lining for the cone of a converter according to  claim 1  or  2 , wherein the height of the projecting bent engagement portion is 5 to 20 mm.  
     
     
         4 . The lining for the cone of a converter according to any one of  claims 1  to  3 , wherein the position of the projecting bent engagement portion is {fraction (1/15)} to ⅓ the total length of the brick from the shell-side end of the firebrick.  
     
     
         5 . A magnesia•carbon firebrick which is an almost rectangular parallelepiped brick comprising MgO and C as main components and has a projecting bent engagement portion on the top surface and the bottom surface of the brick at a position {fraction (1/15)} to ⅓ the total length from the end portion in the longitudinal direction of the brick.