Casting equipment and casting method

Abstract

The present disclosure relates to a casting apparatus and a casting method. The casting method includes injecting a molten material into a mold by using a nozzle, forming a static magnetic field applied region and a non-static magnetic field applied region in a width direction of the mold and controlling a flow of the molten material in a longitudinal direction of the mold, and drawing a cast slab. Through this, as the flow of the molten material accommodated in a container is locally controlled, cleanliness of the molten material may be secured, and a quality of a product may be improved.

1 . A casting apparatus for casting a cast slab, comprising:
 a mold configured to provide an inner space for accommodating a molten material;   a nozzle disposed above the mold to supply the molten material into the mold;   a static magnetic field generation unit disposed on an outside in a width direction of the mold so that magnetic fields at both edges in the width direction of the mold are controlled in different directions; and   a control unit configured to control an operation of the static magnetic field generation unit.   
     
     
         2 . The casting apparatus of  claim 1 , wherein the mold comprises one pair of long side plates spaced apart from each other and one pair of short side plates configured to connect both sides of each of the one pair of long side plates, and
 the static magnetic field generation unit comprises:   a plurality of static magnetic field generators disposed in a width direction of the long side plate below the nozzle so as to be spaced apart from a central portion in the width direction of the mold; and   a first current supplier configured to supply a direct current to the plurality of static magnetic field generators so as to form a magnetic field passing in a thickness direction of the mold at both sides of the nozzle in the width direction of the mold.   
     
     
         3 . The casting apparatus of  claim 2 , wherein each of the plurality of static magnetic field generators comprises:
 a core extending along a portion of the width direction of the long side plate and spaced apart from another core; and   a coil wound around an outside of the core.   
     
     
         4 . The casting apparatus of  claim 3 , wherein the plurality of static magnetic field generators comprise:
 a first static magnetic field generator;   a second static magnetic field generator disposed at one side of the first static magnetic field generator while being spaced apart therefrom so that the nozzle is disposed therebetween;   a third static magnetic field generator disposed to face the second static magnetic field generator; and   a fourth static magnetic field generator disposed at one side of the third static magnetic field generator while being spaced apart therefrom so that the nozzle is disposed therebetween and disposed to face the first static magnetic field generator, and   the first current supplier supplies a direct current to the first static magnetic field generator, the second static magnetic field generator, the third static magnetic field generator, and the fourth static magnetic field generator so as to form opposite polarities in directions facing each other in the thickness direction of the mold and opposite polarities in the width direction of the mold.   
     
     
         5 . The casting apparatus of  claim 4 , wherein the first static magnetic field generator and the second static magnetic field generator are spaced by a first distance from each other, and the third static magnetic field generator and the fourth static magnetic field generator are spaced by a second distance from each other,
 wherein the first distance is the same as the second distance.   
     
     
         6 . The casting apparatus of  claim 5 , wherein when the cast slab has an entire width of 100, each of the first distance and the second distance is in a range from 4 to 36. 
     
     
         7 . The casting apparatus of  claim 6 , wherein at least one of the first static magnetic field generator, the second static magnetic field generator, the third static magnetic field generator, and the fourth static magnetic field generator is movable along the width direction of the mold. 
     
     
         8 . The casting apparatus of  claim 7 , further comprising:
 a first connection core configured to connect the first static magnetic field generator and the second static magnetic field generator; and   a second connection core configured to connect the third static magnetic field generator and the fourth static magnetic field generator.   
     
     
         9 . The casting apparatus of  claim 8 , wherein the static magnetic field generation unit forms a magnetic field that rotates in a circumferential direction of the mold. 
     
     
         10 . The casting apparatus of  claim 1 , further comprising a dynamic magnetic field generation unit disposed above the static magnetic field generation unit to form a dynamic magnetic field for controlling a flow of the molten material,
 wherein the control unit controls an operation of the dynamic magnetic field generation unit so as to adjust at least one of an intensity and a direction of the dynamic magnetic field.   
     
     
         11 - 12 . (canceled) 
     
     
         13 . A casting method comprising:
 injecting a molten material into a mold by using a nozzle;   forming a static magnetic field applied region and a non-static magnetic field applied region in a width direction of the mold and controlling a flow of the molten material in a longitudinal direction of the mold; and   drawing a cast slab.   
     
     
         14 . The casting method of  claim 13 , further comprising, before the injecting of the molten material, arranging the nozzle at a central portion in the width direction of the mold,
 wherein the controlling of the flow of the molten material comprises forming the non-static magnetic field applied region at a central portion in the width direction of the mold and forming the static magnetic field applied region at both sides of the non-static magnetic field applied region.   
     
     
         15 . The casting method of  claim 14 , wherein the controlling of the flow of the molten material comprises forming the static magnetic field applied region and the non-static magnetic field applied region below the nozzle. 
     
     
         16 . The casting method of  claim 15 , wherein the controlling of the flow of the molten material comprises forming a magnetic field along a thickness direction of the mold, and
 the forming of the static magnetic field applied region comprises forming a static magnetic field so that magnetic fields at both sides of the nozzle have opposite directions.   
     
     
         17 . The casting method of  claim 16 , wherein the controlling of the flow of the molten material comprises forming the non-static magnetic field applied region at a portion of the central portion in the width direction of the mold, at which the nozzle is disposed. 
     
     
         18 . The casting method of  claim 17 , wherein the controlling of the flow of the molten material comprises controlling a range of the static magnetic field applied region so that the non-static magnetic field applied region has a magnetic field of 0 Gauss to 100 Gauss. 
     
     
         19 . The casting method of  claim 18 , wherein the controlling of the flow of the molten material comprises adjusting a distance between the static magnetic field applied regions according to a width of the cast slab. 
     
     
         20 . The casting method of  claim 19 , wherein the controlling of the flow of the molten material comprises forming the static magnetic field applied region at both edges in the width direction of the mold to reduce a flow velocity of a downflow of the molten material and forming the non-static magnetic field applied region between the static magnetic field applied regions to form an upflow of the molten material. 
     
     
         21 . The casting method of  claim 20 , wherein the controlling of the flow of the molten material further comprises forming a dynamic magnetic field applied region and a non-dynamic magnetic field applied region to control the flow of the molten material in the width direction of the mold. 
     
     
         22 . The casting method of  claim 21 , wherein the controlling of the flow of the molten material in the width direction of the mold comprises forming a dynamic magnetic field applied region and a non-dynamic magnetic field applied region between a molten surface of the molten material and a lower end of the nozzle. 
     
     
         23 - 24 . (canceled)