Gas Bubbling Element and Corresponding Gas Bubbling System

Abstract

The invention relates to a refractory ceramic gas bubbling element for a metallurgical crucible and to a corresponding gas bubbling system comprising such a gas bubbling element.

1 . A refractory ceramic gas purging element for a metallurgical melting vessel, having sequential sections ( 3 ,  2 ,  4 ,  1 ) between a first end (E 1 ), to which the gas is supplied, and a second end (E 2 ), at which the gas is released:
 a) at least one gas supply pipe ( 5 ) discharges into the first end E 1 ,   b) the gas supply pipe ( 5 ) discharges into a first gas distributor chamber ( 32 );   c) multiple capillary-type channels ( 10 ) run from the first gas distributor chamber ( 32 ) up to a second gas distributor chamber ( 16 ),   d) at least one gas channel ( 6 ), whose flow cross-section is larger than that of a capillary channel ( 10 ), extends from the second gas distributor chamber ( 16 ) up to the second end (E 2 ) of the gas purging element.   
   
   
       2 . The gas purging element according to  claim 1 , whose first and second gas distributor chambers ( 32 ,  16 ) each have a cross-section which is larger than the sum of the cross-sectional areas of the capillary channels ( 10 ). 
   
   
       3 . The gas purging element according to  claim 1 , wherein the gas supply pipe ( 5 ) discharging into the first gas distributor chamber ( 32 ) has a length which is greater than the axial distance between the first end (E 1 ) and the first gas distributor chamber ( 32 ). 
   
   
       4 . The gas purging element according to  claim 3 , wherein the gas supply pipe ( 5 ) is curved as a helix or spiral and/or meander. 
   
   
       5 . The gas purging element according to  claim 3 , wherein the gas supply pipe ( 5 ) is made of a material which melts at a temperature below the temperature of the metallurgical melt to be treated. 
   
   
       6 . The gas purging element according to  claim 3 , wherein the gas supply pipe ( 5 ) is arranged in a bulk material ( 15 ). 
   
   
       7 . The gas purging element according to  claim 1 , wherein the capillary channels ( 10 ) each have a flow cross-section which is at least 50% smaller than the flow cross-section of the gas supply pipe ( 5 ) at the first end (E 1 ) and/or of the gas channel ( 6 ) at the second end (E 2 ). 
   
   
       8 . The gas purging element according to  claim 1 , wherein the capillary channels ( 10 ) each have a flow cross-section which is at least 90% smaller than the flow cross-section of the gas supply pipe ( 5 ) at the first end (E 1 ) and/or of the gas channel ( 6 ) at the second end (E 2 ). 
   
   
       9 . The gas purging element according to  claim 1 , wherein the individual sections ( 3 ,  2 ,  4 ,  1 ), which are connected to one another, are each arranged in a pipe ( 14 ,  12 ,  17 ,  9 ) made of steel or refractory ceramic material. 
   
   
       10 . The gas purging element according to  claim 1 , wherein the sections ( 3 ,  2 ,  4 ,  1 ) are arranged in a common pipe made of steel or refractory ceramic material. 
   
   
       11 . The gas purging element according to  claim 1 , wherein the gas channel(s) ( 6 ) at the second end (E 2 ) has/have a slot-type, triangular, or drop-shaped flow cross-section. 
   
   
       12 . The gas purging element according to  claim 1  having multiple gas channels ( 6 ) at the second end (E 2 ), which extend at a distance to one another along an imaginary line between the second gas distributor chamber ( 16 ) and the second end (E 2 ). 
   
   
       13 . The gas purging element according to  claim 1 , which has a circular cross-section over its entire length. 
   
   
       14 . The gas purging element according to  claim 13 , whose cross-section is reduced from the first end. (E 1 ) to the second end (E 2 ). 
   
   
       15 . A gas purging device having a gas purging element according to  claim 1  and a drive (M) for the axial and/or rotational movement of the gas purging element. 
   
   
       16 . The gas purging device according to  claim 15 , wherein the drive (M) is designed for alternating movement of the gas purging element.