Electromagnetic braking device for continuous casting mold and method of continuous casting by using the same

Abstract

In a magnetic brake apparatus for a continuous casting mold having a pair of first and second upper electromagnets 17 A and 17 B which are oppositely placed near the rear faces of the opposing side walls of the continuous casting mold 10 , and a pair of first and second lower electromagnets 21 A and 21 B which are oppositely placed thereunder, a static magnetic field being generated between each pair of electromagnets to stem the stream of the molten steel supplied to the casting mold by the static magnetic field, the apparatus has controlling units which independently control a current supplied to magnetic coils 16 A and 16 B being constituents of the first and second upper electromagnets and a current supplied to magnetic coils 20 A and 20 B being constituents of the first and second lower electromagnets. The intensity of the magnetic field between the magnetic poles of the upper and lower electromagnets can, thereby, be readily and inexpensively varied during casting without restriction.

1 . A magnetic brake apparatus for a continuous casting mold comprising: a pair of upper electromagnets oppositely placed near the rear faces of the opposing side walls of the continuous casting mold, and a pair of lower electromagnets placed thereunder; 
 a static magnetic field being generated between these paired electromagnets to stem the flow of the molten steel supplied to the continuous casting mold by means of the static magnetic field; wherein the magnetic brake apparatus further comprises controlling means for independently controlling currents supplied to magnetic coils which are constituents of the electromagnets.    
     
     
         2 . A magnetic brake apparatus for a continuous casting mold according to  claim 1 , wherein the magnetic brake apparatus has controlling means for independently controlling the current supplied to the magnetic coil being a constituent of the pair of upper coils and the current supplied to the magnetic coil being a constituent of the pair of lower coils.  
     
     
         3 . A magnetic brake apparatus for a continuous casting mold according to either  claim 1  or  2 , wherein an upper iron core and a lower iron core which are constituents of the upper electromagnet and the lower electromagnet, respectively, placed near the rear face at the same side of the opposing side walls of the casting mold are magnetically connected to each other.  
     
     
         4 . A continuous casting method comprising continuously casting while stemming the jet stream of the molten steel supplied to the interior of the casting mold through a discharging opening of an sub-entry nozzle using a magnetic brake apparatus for a continuous casting mold according to go any one of  claims 1  to  3 .