Method of and device for equalizing solidification process of molten metal produced, in particular, during strip casting

Abstract

A method of equalizing a solidification process of molten metal produced, in particular, during strip casting, includes subjecting the molten metal to an electromagnetic stirring process, with a magnetic field is applied to the molten metal located upstream of the area of the electromagnetic stirring process. The electromagnetic stirring includes applying, during the solidification process, at least one electromagnetic field to an already solidified, external region ( 11 ) of the molten metal ( 10 ).

1 . A method of equalizing a solidification process of a cast strip transported on a horizontal conveyor belt, comprising the steps of:
 pouring a molten metal on a horizontal cooled conveyor belt from one of horizontal tundish and a horizontal cast mold;   applying a magnetic field to the molten metal; and   applying, downstream of a point of application of the magnetic field, a stirring electromagnetic field to already solidified external region of the molten metal.   
     
     
         2 . A method according to  claim 1 , wherein the applied magnetic field is a static magnetic field and the applied stirring electromagnetic field is a traveling electromagnetic field. 
     
     
         3 . A method according to  claim 1 , wherein the step of applying the stirring electromagnetic field includes applying the electromagnetic field at a top surface of the molten metal. 
     
     
         4 . A method according to  claim 1 , wherein application of the electromagnetic field takes place at start of stirring. 
     
     
         5 . A method according to  claim 1 , further comprising the step of applying a further stirring electromagnetic field at a bottom surface of the molten metal. 
     
     
         6 . A method according to  claim 1 , wherein a position of an electromagnetic stirring is adapted, in a casting direction, in accordance with a cast speed. 
     
     
         7 . A device for equalizing a solidification process of a cast strip transported on a horizontal conveyor belt, comprising:
 means for subjecting the molten metal to an electromagnetic stirring process,   means for applying a magnetic field to the molten metal; and   stirring means located downstream of the magnetic means, for applying, during the solidification process, at least one electromagnetic field to an already solidified, external region of the molten metal.   
     
     
         8 . A device according to  claim 7  wherein stirring means is arranged at a top of the molten metal. 
     
     
         9 . A device according to  claim 7 , wherein a position of the stirring means is adapted, in a casting direction, according to the cast speed of the molten metal.