US20130192791A1 - Molding device for continuous casting equipped with agitator - Google Patents

Molding device for continuous casting equipped with agitator Download PDF

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Publication number
US20130192791A1
US20130192791A1 US13/810,016 US201113810016A US2013192791A1 US 20130192791 A1 US20130192791 A1 US 20130192791A1 US 201113810016 A US201113810016 A US 201113810016A US 2013192791 A1 US2013192791 A1 US 2013192791A1
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United States
Prior art keywords
casting mold
melt
molding device
magnetic field
electrodes
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Abandoned
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US13/810,016
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English (en)
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Kenzo Takahashi
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/114—Treating the molten metal by using agitating or vibrating means
    • B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting

Definitions

  • the present invention relates to a molding device for continuous casting, which is equipped with an agitator, of continuous casting equipment that produces a billet, a slab or the like made of non-ferrous metal of a conductor (conductive body), such as Al, Cu, Zn, or an alloy of at least two of them, or an Mg alloy.
  • a conductor conductive body
  • a melt agitating method to be described below has been employed in a casting mold for continuous casting. That is, for the improvement of the quality of a slab, a billet, or the like, in a process for solidifying the melt, that is, when the melt passes through the casting mold, a moving magnetic field, which is generated from the outside of the casting mold by an electromagnetic coil, is applied to the melt present in the casting mold so that agitation occurs in the melt not yet solidified.
  • a main object of this agitation is to degas the melt and to uniformize the structure.
  • the electromagnetic coil is disposed at the position close to high-temperature melt, the cooling of the electromagnetic coil and troublesome maintenance are needed and large power consumption is naturally needed.
  • the generation of heat from the electromagnetic coil itself caused by the power consumption cannot be avoided, and this heat should be removed. For this reason, there are various problems in that the device itself cannot but become expensive, and the like.
  • Patent Literature 1 JP 09-99344 A
  • the invention has been made to solve the above-mentioned problems, and an object of the invention is to provide a molding device for continuous casting equipped with an agitator that reduces the amount of generated heat, is easy to carry out maintenance, is inexpensive, and is easy to use in practice.
  • the first electrodes are provided so as to conduct electricity to the liquid-phase melt
  • the second electrode is provided so as to conduct electricity to the solid-phase cast product.
  • the first and second electrodes are adapted so as to conduct electricity in the vertical direction through the melt and the cast product provided therebetween.
  • the magnetic field generation device is provided outside the casting mold and generating magnetic lines of force in a lateral direction so that the magnetic lines of force penetrate into the casting mold, reach the inside of the casting mold, and are applied to the melt in the lateral direction crossing the current.
  • FIG. 1 is a diagram illustrating the entire structure of an embodiment of the invention.
  • FIG. 2 is an explanatory plan view illustrating a state where a melt supply unit of FIG. 1 is removed.
  • FIG. 3( a ) is an explanatory plan view of a magnetic field generation device of an agitator
  • FIG. 3( b ) is an explanatory plan view of a modified example thereof.
  • FIG. 4( a ) is an explanatory plan view of another modified example of the magnetic field generation device of the agitator
  • FIG. 4( b ) is an explanatory plan view of a modified example thereof.
  • FIG. 5 is a diagram illustrating the entire structure of another embodiment of the invention.
  • FIG. 6 is a diagram illustrating the entire structure of still another embodiment of the invention.
  • FIG. 7 is a diagram illustrating the entire structure of yet another embodiment of the invention.
  • FIG. 8 is a diagram illustrating the entire structure of still another embodiment of the invention.
  • melt M of non-ferrous metal is discharged from a melt receiving box that is called a tundish and is poured into a casting mold that is provided on the lower side. Cooling water for cooling the casting mold is circulated in the casting mold. Accordingly, high-temperature melt starts to solidify from the outer periphery thereof (a portion thereof close to the casting mold) from the moment that the high-temperature melt comes into contact with the casting mold.
  • melt which is positioned at the central portion of the casting mold, is distant from the wall of the casting mold that is being cooled, the solidification of the melt positioned at the central portion of the casting mold is naturally later than that of the melt positioned at the peripheral portion of the casting mold.
  • two kinds of melt that is, liquid (liquid-phase) melt and a solid (solid-phase) casting are simultaneously present in the casting mold.
  • melt is solidified too rapidly, gas remains in a cast product (product) having been changed into a solid and causes the quality of the product to deteriorate. For this reason, degassing is facilitated by the agitating of the melt that is not yet solidified.
  • the electromagnetic agitator has been used for the agitating in the related art.
  • the invention is to provide a molding device for continuous casting equipped with an agitator that does not use the electromagnetic agitator.
  • FIG. 1 is an explanatory plan view illustrating a state where a melt supply unit of FIG. 1 is removed, and mainly illustrates a part of a casting mold 2 and an agitator 3 .
  • FIG. 3( a ) is an explanatory plan view of a magnetic field generation device 31 of the agitator 3 .
  • the device broadly includes a melt supply unit 1 that supplies melt M of non-ferrous metal of a conductor (conductive body), such as Al, Cu, Zn, or an alloy of at least two of them, or an Mg alloy; a casting mold 2 that receives the melt from the melt supply unit 1 ; and an agitator 3 that agitates the melt M present in the casting mold 2 .
  • a melt supply unit 1 that supplies melt M of non-ferrous metal of a conductor (conductive body), such as Al, Cu, Zn, or an alloy of at least two of them, or an Mg alloy
  • a casting mold 2 that receives the melt from the melt supply unit 1
  • an agitator 3 that agitates the melt M present in the casting mold 2 .
  • the melt supply unit 1 includes a tundish (melt receiving box) 1 A that receives melt M from a ladle (not illustrated) or the like.
  • the melt M is stored in the tundish (melt receiving box) 1 A, inclusion is removed from the melt, and the melt is supplied to the casting mold 2 from the lower portion of the tundish at a constant supply rate. Only the tundish (melt receiving box) 1 A is illustrated in FIG. 1 .
  • the casting mold 2 is adapted in this embodiment so that a columnar product is taken out from the casting mold.
  • the casting mold 2 is formed so as to have a substantially cylindrical double structure. That is, the casting mold 2 includes an inner casting mold 21 that is provided on the inside and made of a non-conductive material (non-conductive refractory material), and an outer casting mold 22 that is provided outside and made of a conductive material (conductive refractory material).
  • an inner casting mold which is made of a conductive material such as graphite, may be used as the inner casting mold.
  • a conductive material such as graphite
  • FIG. 8 illustrates an example of an embodiment in which an inner casting mold 21 A made of graphite is used. Since the inner casting mold 21 A is directly electrically connected to a power supply 34 in the case of this embodiment as understood from FIG. 8 , upper electrodes 32 A do not need to be provided as understood from the comparison between the embodiment of FIG. 1 and this embodiment.
  • the casting mold 2 further includes a water jacket 23 outside the outer casting mold 22 .
  • the water jacket 23 is to cool the melt M that flows into the inner casting mold 21 . That is, cooling water is circulated in the water jacket 23 , and the outer portion of the outer casting mold 22 is cooled by the cooling water. The melt M is rapidly cooled by the water jacket 23 . Since water jackets having various known structures may be employed as the water jacket 23 , the detailed description thereof will not be repeated here.
  • a plurality of electrode insertion holes 2 a, 2 a , . . . into which electrodes 32 A to be described below are inserted and pulled out are formed at a predetermined interval on the circumference of the casting mold 2 having the above-mentioned structure.
  • the electrode insertion holes 2 a are formed so as to be inclined downward toward the center of the casting mold 2 . For this reason, if the surface of the melt M is lower than the upper openings of the electrode insertion holes 2 a even though the melt M is contained in the casting mold 2 , there is no concern that the melt M will leak to the outside.
  • the agitator 3 is provided on the casting mold 2 .
  • the agitator 3 includes a permanent magnet type magnetic field generation device 31 , and a pair of upper and lower electrode (positive and negative electrodes) 32 A and 32 B.
  • the magnetic field generation device 31 is formed in the shape of a ring and is installed so as to be directly or indirectly fitted to the outer periphery of the water jacket 23 .
  • the ring-shaped magnetic field generation device 31 is adapted so that the position of the magnetic field generation device can be adjusted relative to the water jacket 23 (casting mold 2 ) in the vertical direction. Accordingly, it is possible to select the position where agitating efficiency is best relative to the casting mold 2 by adjusting the position of the magnetic field generation device 31 in the vertical direction.
  • Four portions of the magnetic field generation device 31 are magnetized and form pairs of magnetic poles 31 a, 31 a, . . . .
  • each pair of magnetic poles 31 a facing the inside of the ring-shaped magnetic field generation device 31 is magnetized to an N pole, and a portion thereof facing the outside of the ring-shaped magnetic field generation device 31 is magnetized to an S pole. Accordingly, magnetic lines ML of force generated from the N pole horizontally pass through the melt M that is present in the casting mold 2 , and enter the S pole.
  • One electrode 32 A may be used, but a plurality of electrodes 32 A may be used. In this embodiment, two electrodes 32 A are used.
  • the electrodes 32 A are formed in the shape of a probe.
  • the respective electrodes 32 A are inserted into the above-mentioned electrode insertion holes 2 a. That is, the electrodes 32 A penetrate into the casting mold 2 (the inner casting mold 21 and the outer casting mold 22 ) from the water jacket 23 . Inner ends of the electrodes 32 A are exposed to the inside of the inner casting mold 21 , come into contact with the melt M, and conduct electricity to the melt M.
  • Electrodes 32 A are exposed to the outside of the water jacket 23 .
  • the outer ends are connected to the power supply 34 that can supply variable direct current.
  • the electrodes 32 A may be supported above the upper opening of the casting mold 2 without penetrating the side wall of the casting mold 2 so that the inner ends of the electrodes 32 A are inserted into the melt M from the surface of the melt M flowing into the casting mold 2 .
  • the number of electrodes used as the electrodes 32 A may be arbitrary, and an arbitrary number of the electrodes 32 A may be inserted into arbitrary electrode insertion holes of the electrode insertion holes 2 a, 2 a, . . . .
  • the lower electrode 32 B is provided so that the position of the lower electrode 32 B is fixed.
  • the electrode 32 B is formed of a roller type electrode. That is, the lower electrode 32 B includes a rotatable roller 32 Ba at the end thereof.
  • the roller 32 Ba comes into press contact with the outer surface of a columnar product P as a cast product (a billet or a slab) that is extruded in a solid phase state. Accordingly, as the product P extends downward, the roller 32 Ba is rotated. That is, when the product P is extruded downward, the product P extends downward in FIG. 1 while coming into contact with the roller 32 Ba and rotating the roller 32 Ba.
  • the power supply 34 is adapted so as to be capable of controlling the amount of current flowing between the pair of electrodes 32 A and 32 B. Therefore, it is possible to select current where the liquid-phase melt M can be agitated most efficiently in a relation with the magnetic lines ML of force.
  • the casting mold 2 is cooled through the circulation of water in the water jacket 23 , so that the melt M present in the casting mold 2 is rapidly cooled and solidified.
  • the melt M present in the casting mold 2 has a two-phase structure where the upper portion of the melt is liquid (liquid phase) and the lower portion thereof is solid (solid phase).
  • the melt M is formed in the shape (a columnar shape in this embodiment) corresponding to the shape of the casting mold. Accordingly, a product P as a slab or billet is continuously formed.
  • the magnetic field (magnetic lines of force ML) of the magnetic field generation device reaches the melt M, which is present in the casting mold 2 , in the lateral direction.
  • the current flows to the lower electrode 32 B from the upper electrodes 32 A through the melt (liquid phase) M of aluminum or the like and the product (solid phase) P.
  • the current crosses the magnetic lines of force ML, which are generated from the permanent magnet type magnetic field generation device 31 , substantially at right angles to the magnetic lines of force.
  • the double structure of the casting mold 2 may be formed so that the inner portion of the casting mold is made of a conductive material and the outer portion thereof is made of a non-conductive material.
  • at least the electrodes 32 A may come into electrically contact with the conductive material that forms the inner portion of the casting mold.
  • the casting mold 2 may have not a double structure but a single structure.
  • the casting mold may be made of only a conductive material, and the electrodes 32 A may conduct electricity to the casting mold 2 .
  • the structure of the other electrode 32 B may be the same as described above.
  • the casting mold 2 may be made of only a non-conductive material. In this case, it is necessary to make the electrodes 32 A conduct electricity to the melt M present in the casting mold 2 by making the electrodes 32 A penetrate into the casting mold 2 etc. as illustrated in FIG. 1 .
  • a magnetic field generation device 31 A of FIG. 3( b ) may be used instead of the magnetic field generation device 31 of FIG. 3( a ).
  • the magnetization direction of the magnetic field generation device 31 A of FIG. 3( b ) is opposite to that of the magnetic field generation device 31 of FIG. 3( a ). Both the magnetic field generation devices have the same function.
  • magnetic field generation devices 31 - 2 and 31 A- 2 of FIGS. 4( a ) and 4 ( b ) may be used instead of the magnetic field generation devices 31 and 31 A of FIGS. 3( a ) and 3 ( b ).
  • the magnetic field generation devices 31 - 2 and 31 A- 2 of FIGS. 4( a ) and 4 ( b ) are adapted so that a plurality of rod-like permanent magnets PM are fixed to the inside of a ring-shaped support (yoke) SR These have the same function.
  • an electrode which includes the roller 32 Ba at the end thereof, has been described as the lower electrode 32 B in the above-mentioned embodiment.
  • the lower electrode does not need to necessarily include the roller 32 Ba.
  • the electrode 32 B only has to keep conducting electricity to the product P and may employ various structures.
  • an elastic member having a predetermined length is used as the electrode 32 B and is bent, for example, so as to be convex upward or downward in FIG. 1 , and the end of the elastic member comes into press contact with the cast product P by the force of restitution. In this state, the cast product P may be allowed to extend downward.
  • melt M that is not yet solidified is agitated to give movement, vibration, and the like to the melt M, so that a degassing effect and the uniformization and refinement of the metallic structure are achieved.
  • the electromagnetic agitator in the related art can cope with a case where several slabs or billets are produced at one time.
  • the electromagnetic agitator in the related art cannot cope with this demand.
  • the magnetic field generation device was used as the magnetic field generation device in the device of the invention. For this reason, it is possible to make the device very compact in comparison with the electromagnetic agitator. Accordingly, it is sufficiently possible to realize a molding device for a mass production facility. Further, since the magnetic field generation device is permanent magnet type, it is possible to obtain a device having effects, such as no heat generation, power saving, energy saving, and less maintenance, as a magnetic field generation device.
  • FIG. 5 illustrates another embodiment of the invention. More current is supplied to this liquid-phase melt M to generate a larger electromagnetic force so that the melt M is rotationally driven.
  • This embodiment is different from the embodiment of FIG. 1 in the structure of a casting mold 2 A.
  • Other structures are substantially the same as FIG. 1 . Accordingly, the detailed description thereof will not be repeated here.
  • the casting mold 2 A of this embodiment includes a substantially cylindrical casting mold body 2 A 1 .
  • the casting mold body 2 A 1 includes a circumferential groove that is formed on the inner peripheral surface thereof.
  • An insulating film 2 A 2 is formed on the inner surface (the peripheral surface and the bottoms) of this groove, and an embedded layer 2 A 3 is formed by embedding the same conductive material as the casting mold body 2 A 1 on the insulating film 2 A 2 .
  • An insulating layer portion is formed of the insulating film 2 A 2 and the embedded layer 2 A 3 .
  • the insulating layer portion is formed on a part of the inner surface of the casting mold, and functions as a portion that does not allow the flow of current from the casting mold.
  • This insulating layer portion is formed on a slightly lower portion of the inner surface of the casting mold body 2 A 1 .
  • a terminal 2 A 4 is provided on the outer periphery of the casting mold body 2 A 1 . Power can be supplied to the casting mold 2 A from the power supply 34 through this terminal 2 A 4 .
  • a water jacket is not illustrated in FIG. 5 .
  • FIG. 6 illustrates still another embodiment.
  • This embodiment is a modified example of the embodiment of FIG. 1 .
  • This embodiment is different from the embodiment of FIG. 1 in the disposition of the upper electrodes 32 A of FIG. 1 . That is, in this embodiment, one or a plurality of electrodes 32 A 0 , 32 A 0 , . . . are disposed annularly, these electrodes 32 A 0 are supported by arbitrary means other than the casting mold 2 and the like (the casting mold 2 and the water jacket 23 ), and lower end portions of each of the electrodes 32 A 0 is inserted into the melt M. Accordingly, it is possible to adjust the length of the lower end portion, which is inserted into the melt M, of the electrode 32 A 0 with large degree of freedom regardless of the casting mold 2 and the like. Moreover, naturally, a normal mold may be used as the casting mold 2 etc., and electrode insertion holes do not need to be formed in the casting mold 2 . Therefore, it is also possible to prevent the increase in the manufacturing costs of these.
  • FIG. 7 illustrates yet another embodiment.
  • This embodiment may be regarded as a modified example of the embodiment of FIG. 6 .
  • FIG. 7 is assumed as a device that can be operated when melt M is poured into a casting mold 2 , which is provided on the lower side, from a tundish (melt receiving box) 1 A, which is provided on the upper side, as continuous melt with no interruption. That is, it is assumed that the melt M present in the tundish (melt receiving box) 1 A and the melt M present in the casting mold 2 are integrally connected to each other.
  • the electrodes 32 A 0 are inserted into the melt M present in the casting mold 2 .
  • an electrode 32 A 1 is supported by arbitrary means so as to be inserted into the melt M present in the tundish (melt receiving box) 1 A on the premise of the above-mentioned case. Accordingly, it is possible to obtain the same advantage as the above-mentioned embodiment of FIG. 6 .
  • FIG. 6 Other structures are substantially the same as FIG. 6 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
US13/810,016 2010-07-16 2011-07-15 Molding device for continuous casting equipped with agitator Abandoned US20130192791A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2010162058 2010-07-16
JP2010162058 2010-07-16
JP2010226818A JP5669509B2 (ja) 2010-07-16 2010-10-06 攪拌装置付き連続鋳造用鋳型装置
JP2010226818 2010-10-06
PCT/JP2011/066223 WO2012008574A1 (fr) 2010-07-16 2011-07-15 Dispositif de moulage pour la coulée continue présentant un dispositif agitateur

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US20130192791A1 true US20130192791A1 (en) 2013-08-01

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US (1) US20130192791A1 (fr)
EP (1) EP2594351B1 (fr)
JP (1) JP5669509B2 (fr)
AU (1) AU2011277379B2 (fr)
CA (1) CA2804644C (fr)
WO (1) WO2012008574A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9364891B2 (en) 2013-08-08 2016-06-14 Kenzo Takahashi Molding device for continuous casting with stirring unit
US9593884B2 (en) 2012-08-08 2017-03-14 Kenzo Takahashi Permanent magnet type cylindrical molten-metal agitator and melting furnace with permanent magnet type suction pump
WO2020085775A1 (fr) * 2018-10-24 2020-04-30 주식회사 퓨쳐캐스트 Appareil de coulée sous pression doté d'un module de commande de structure à commande électromagnétique mobile
US11577308B2 (en) 2018-10-24 2023-02-14 Futurecast Co., Ltd. Die casting apparatus provided with movable electromagnetically controlled structure control module

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103624230B (zh) * 2013-11-22 2015-10-28 江苏大学 一种组合外场下离心铸造高速钢轧辊的方法
KR102508917B1 (ko) 2014-05-21 2023-03-14 노벨리스 인크. 혼합 이덕터 노즐 및 흐름 제어 디바이스

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US4846255A (en) * 1987-10-28 1989-07-11 The United States Of America As Represented By The United States Department Of Energy Electromagnetic augmentation for casting of thin metal sheets
US5279351A (en) * 1991-11-13 1994-01-18 Paul Metz Electromagnetic stirring process for continuous casting
US20020179281A1 (en) * 2000-02-29 2002-12-05 Siebo Kunstreich Equipment for supplying molten metal to a continuous casting ingot mould and method for using same
US20080115909A1 (en) * 2006-11-15 2008-05-22 Inteco Special Melting Technologies Gmbh Process for electroslag remelting of metals and ingot mould therefor
US20080236780A1 (en) * 2005-11-28 2008-10-02 Rotelec Adjusting the Mode of Electromagnetic Stirring Over the Height of a Continous Casting Mould

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JPS58100956A (ja) * 1981-12-11 1983-06-15 Sumitomo Metal Ind Ltd 電磁撹拌装置
DE3702381A1 (de) * 1987-01-23 1988-08-04 Mannesmann Ag Verfahren und vorrichtung zum magnetischen ruehren eines metallstrangs und vorrichtung zur durchfuehrung des verfahrens
JPH0999344A (ja) 1995-10-05 1997-04-15 Furukawa Electric Co Ltd:The 非鉄金属スラブの縦型半連続鋳造用鋳型
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Publication number Priority date Publication date Assignee Title
US3947533A (en) * 1974-06-14 1976-03-30 Biomagnetics, International Inc. Magnetic field expansion and compression method
US4846255A (en) * 1987-10-28 1989-07-11 The United States Of America As Represented By The United States Department Of Energy Electromagnetic augmentation for casting of thin metal sheets
US5279351A (en) * 1991-11-13 1994-01-18 Paul Metz Electromagnetic stirring process for continuous casting
US20020179281A1 (en) * 2000-02-29 2002-12-05 Siebo Kunstreich Equipment for supplying molten metal to a continuous casting ingot mould and method for using same
US20080236780A1 (en) * 2005-11-28 2008-10-02 Rotelec Adjusting the Mode of Electromagnetic Stirring Over the Height of a Continous Casting Mould
US20080115909A1 (en) * 2006-11-15 2008-05-22 Inteco Special Melting Technologies Gmbh Process for electroslag remelting of metals and ingot mould therefor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9593884B2 (en) 2012-08-08 2017-03-14 Kenzo Takahashi Permanent magnet type cylindrical molten-metal agitator and melting furnace with permanent magnet type suction pump
US9364891B2 (en) 2013-08-08 2016-06-14 Kenzo Takahashi Molding device for continuous casting with stirring unit
WO2020085775A1 (fr) * 2018-10-24 2020-04-30 주식회사 퓨쳐캐스트 Appareil de coulée sous pression doté d'un module de commande de structure à commande électromagnétique mobile
US11577308B2 (en) 2018-10-24 2023-02-14 Futurecast Co., Ltd. Die casting apparatus provided with movable electromagnetically controlled structure control module

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Publication number Publication date
CA2804644A1 (fr) 2012-01-19
WO2012008574A1 (fr) 2012-01-19
AU2011277379B2 (en) 2014-03-27
JP5669509B2 (ja) 2015-02-12
EP2594351A4 (fr) 2017-09-06
EP2594351A1 (fr) 2013-05-22
CA2804644C (fr) 2016-09-27
JP2012035322A (ja) 2012-02-23
AU2011277379A9 (en) 2013-07-11
AU2011277379A1 (en) 2013-01-24
EP2594351B1 (fr) 2019-12-18

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