Refractory ceramic plug

Abstract

The invention relates to a refractory ceramic plus for regulating a metal melt flowing past in the region of an outlet opening of a metallurgical melting vessel, for example of a tundish.

1 . A refractory ceramic plug for controlling a metal melt flow, with the following features:
   1 . 1  A rod-shaped body ( 10 ) with a first end ( 12 ) and a second end ( 14 ),     1 . 2  From the first end ( 12 ) of the body ( 10 ) a sack-like opening ( 16 ) extends from a feeding region ( 22 ) in axial direction of the body ( 10 ) as far as to a connecting region ( 24 ) with a base ( 26 ),     1 . 3  From the connecting region ( 24 ) of the opening ( 16 ) at least one gas channel ( 18 ) runs as far as to a surface section ( 20 ) of the body ( 10 ) in the region of its second end ( 14 ),     1 . 4  The gas channel ( 18 ) has a cross-sectional area that is smaller than the cross-sectional area of the opening ( 16 ),     1 . 5  Along the opening ( 16 ) at least one section ( 30 ) is provided through which a gas delivered from the feeding region ( 22 ) to the connecting region ( 24 ) is forcibly fed, wherein the section ( 30 ) has an effective flow cross section that is smaller than that of the opening ( 16 ),     1 . 6  In the region of the opening ( 16 ) between the base ( 26 ) and the section ( 30 ) adjacent to the base ( 26 ) a device ( 40 ) for measuring the gas pressure in this region ( 34 ) is arranged or connected thereto.   
     
     
         2 . The plug according to  claim 1 , with a gas channel ( 18 ) running coaxially to the opening ( 16 ). 
     
     
         3 . The plug according to  claim 1  whose section ( 30 ) lies with the opening ( 16 ). 
     
     
         4 . The plug according to  claim 1 , whose section ( 30 ) is formed by a filler body stationarily arranged in the opening ( 16 ), wherein at least one gas passage between the filler body and a corresponding wall ( 38 ) of the opening ( 16 ) remains free. 
     
     
         5 . The plug according to  claim 1 , whose section ( 30 ) is formed by a filler body stationarily arranged in the opening ( 16 ), which extends over the entire cross section of the opening ( 16 ) wherein at least one gas passage ( 36 ) runs through the filler body, through which a gas flows in the direction of the connecting region ( 24 ) of the opening ( 16 ). 
     
     
         6 . The plug according to  claim 1 , with a filler body ( 30 ) which extends over the entire cross section of the opening ( 16 ) and divides the opening ( 16 ) in axial direction into two regions ( 32 ,  34 ), and with a channel ( 36 ′), which connects the one region ( 32 ) of the opening ( 16 ) with the other region ( 34 ) of the opening ( 16 ) and has a cross section that is smaller than the cross section of each region ( 32 ,  34 ) of the opening ( 16 ). 
     
     
         7 . The plug according to  claim 1 , whose device ( 40 ) for the measurement of the gas pressure comprises a pressure gauge ( 44 ). 
     
     
         8 . The plug according to  claim 1 , whose device ( 40 ) for the measurement of the gas pressure comprises a measuring channel ( 42 ) which connects the connecting region ( 34 ) of the opening ( 16 ) with a pressure measuring device ( 44 ). 
     
     
         9 . The plug according to  claim 8 , whose measuring channel ( 42 ) leads from the connecting region ( 34 ) at least in sections through the body ( 10 ) in the direction of its first end ( 12 ). 
     
     
         10 . The plug according to  claim 1 , whose device ( 40 ) for the measurement of the gas pressure comprises a pressure measuring device ( 44 ′,  44 ″) arranged in the connecting region ( 34 ). 
     
     
         11 . The plug according to  claim 1 , whose device ( 40 ) for the measurement of the gas pressure comprises a diaphragm pressure gauge ( 44 ′). 
     
     
         12 . The plug according to  claim 1 , whose device ( 40 ) for the measurement of the gas pressure comprises an electronic pressure measuring device ( 44 ″).