EP1694455A1 - Magnetische bremse für stranggiesskokille - Google Patents
Magnetische bremse für stranggiesskokilleInfo
- Publication number
- EP1694455A1 EP1694455A1 EP04803301A EP04803301A EP1694455A1 EP 1694455 A1 EP1694455 A1 EP 1694455A1 EP 04803301 A EP04803301 A EP 04803301A EP 04803301 A EP04803301 A EP 04803301A EP 1694455 A1 EP1694455 A1 EP 1694455A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- continuous casting
- permanent magnets
- casting mold
- mold
- field strength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 50
- 238000009749 continuous casting Methods 0.000 title claims abstract description 16
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 4
- 239000003302 ferromagnetic material Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000005294 ferromagnetic effect Effects 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 229910052802 copper Inorganic materials 0.000 claims 2
- 239000010949 copper Substances 0.000 claims 2
- 238000005266 casting Methods 0.000 description 14
- 230000004907 flux Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000003313 weakening effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229910001047 Hard ferrite Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- 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
- B22D11/16—Controlling or regulating processes or operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/02—Use of electric or magnetic effects
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
Definitions
- the invention relates to a continuous casting mold, in particular thin slab mold, in which the flow of the liquid metal in the mold is influenced by a magnetic field generated by means of permanent magnets arranged on the mold, the permanent magnets having different magnetic strengths or different distances from one another over the width and / or height for a different field strength.
- Document EP 0 880 417 B1 describes a magnetic brake for casting metal in a mold, consisting of a magnetic core and a coil supplied with direct current or with low frequency alternating current. A magnetic return line is also provided in order to close the magnetic circuit.
- Document EP 0 568 579 describes a method for controlling the flow of molten metal into the non-solidified metal areas of a casting mold, wherein this is supplied with at least one primary flow of molten metal and a cast strand is formed in the mold, with at least one static magnetic field from Poles are generated, which are arranged next to the mold and consist of permanent magnets, the magnetic field being used to brake and split the primary stream of molten metal flowing into the mold and to control the secondary currents that arise, the magnetic field being essentially arranged in this way that it works across the entire width of the strand formed in the mold.
- the magnetic field strength should vary in the plane that extends perpendicular to the casting direction and at the level at which the magnetic field strength reaches its maximum value within an interval of 60 to 100% of this maximum value, while at the same time the field strength at one level with the highest surface / meniscus of the molten metal has a maximum value of 500 GAUß.
- the magnetic field is controlled and distributed by the magnetic poles being movable and / or provided with adjustable core elements.
- Document EP 0 040 383 (B1) describes a method for stirring the non-solidified areas in a casting strand, the strand being formed in a mold and a pouring jet flowing through a pouring tube or directly into the mold. Where the pouring jet penetrates the melt already in the mold, at least one static magnetic field acting in the melt is generated, which brakes the pouring jet and splits it in such a way that its momentum is weakened or consumed.
- a device provided for this purpose can consist of one or more permanent magnets.
- the document JP 08155610 has a mold with a rectangular design, at the four corners of which permanent magnets are arranged to generate south and north magnetic fields.
- Bo is the induction field strength of one of the permanent magnets
- z is the distance from one of the magnets
- d is the distance between the magnets
- h is the effective height of the magnet.
- the effective height h is determined by measurement.
- cosh is the hyperbolic cosine (see Figure 1).
- the object of the invention is to provide means for varying the magnetic field strength of permanent magnets on a continuous casting mold.
- the object is achieved according to the invention in that the permanent magnets can be set differently for a different field strength distribution in groups.
- a preferred embodiment of the invention provides that the permanent magnets can be moved on the mold by means of displaceable and / or pivotable adjusting means in order to adapt the field strength.
- ⁇ is the magnetic flux
- B is the magnetic field strength
- A is the passage area to the casting mold
- cos is the cosine of the angle between the vector of the magnetic field strength and the surface normal vector of the passage area.
- the rotation facilitates the detachment of the magnets from the passage surface, because according to the regulations for the assembly of these permanent magnets it is necessary to place them on one edge and then to place them on the carrier at a constantly decreasing angle (see Figure 3).
- the magnets are not placed directly on the carrier made of ferromagnetic material, but a layer of non-ferromagnetic material is placed between them for easier detachment for rotation or assembly. This can be austenitic steel, but an approx. 1 mm thick plastic plate is also sufficient.
- the uneven spacing of the magnets from the passage surface associated with the rotation is magnetically compensated by a passage body through the water box of the casting mold made of ferromagnetic material.
- Casting mold with window for external magnetic brake The magnetic field generated by the permanent magnets must remain adjustable in its field strength.
- the permanent magnets are mounted on the teeth of a rake that engages in the support ribs of the water boxes of the casting mold.
- a device makes it possible to adjust the distance between the teeth and the mold by displacement. This makes it possible to vary the strength of the magnetic field.
- the device can be moved using a mechanical spindle or a hydraulic cylinder.
- Casting mold with integrated magnetic brake The previous electrical device for generating the magnetic field is removed and a device for holding the permanent magnets is mounted on the then exposed ferromagnetic block (passage window) in the water tank.
- This device can be moved by rotation and thus the magnetic field strength can be varied.
- the device can be moved by a mechanical spindle or by a hydraulic cylinder.
- the magnetic field strength can also be set in this way.
- Permanent magnets are so strong that they cannot be produced over a large area. Such a magnet would be blown up by its own field forces, i.e. are literally torn apart. One is therefore forced to produce large-area magnets for the width of a continuous casting mold from many individual magnets which are glued to a large-area carrier made of ferromagnetic material in order to convert the magnetic flux densities of the many individual magnets into a large-area magnetic flux, which then has the metallurgical effects in the mold has to unite. This is important insofar as the same orientation of the magnetic poles means that small magnets cannot be placed as close to one another as desired, since poles of the same name repel the magnets. This forces the magnet carrier to have multiple layers, since in the second layer the permanent gaps in the first layer must be covered by permanent magnets.
- the magnets must not only sit on the teeth of the Ruler, but also on the back of the magnet carrier (Rulers) made of ferromagnetic material and again here in several layers, since otherwise the required magnetic flux density in the metallurgical part of the mold is reached.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Continuous Casting (AREA)
- Braking Arrangements (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10359409 | 2003-12-18 | ||
| DE102004046729A DE102004046729A1 (de) | 2003-12-18 | 2004-09-25 | Magnetische Bremse für Stranggießkokille |
| PCT/EP2004/013444 WO2005058530A1 (de) | 2003-12-18 | 2004-11-26 | Magnetische bremse für stranggiesskokille |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1694455A1 true EP1694455A1 (de) | 2006-08-30 |
| EP1694455B1 EP1694455B1 (de) | 2007-06-20 |
Family
ID=34701994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04803301A Expired - Lifetime EP1694455B1 (de) | 2003-12-18 | 2004-11-26 | Magnetische bremse für stranggiesskokille |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20070089851A1 (de) |
| EP (1) | EP1694455B1 (de) |
| JP (1) | JP2007534492A (de) |
| KR (1) | KR20060120022A (de) |
| AT (1) | ATE365087T1 (de) |
| CA (1) | CA2543600A1 (de) |
| DE (1) | DE502004004157D1 (de) |
| ES (1) | ES2287797T3 (de) |
| WO (1) | WO2005058530A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009029889A1 (de) * | 2008-07-15 | 2010-02-18 | Sms Siemag Ag | Elektromagnetische Bremseinrichtung an Stranggießkokillen |
| JP5079681B2 (ja) * | 2008-12-25 | 2012-11-21 | 株式会社神戸製鋼所 | 鋳型内溶鋼の上昇流に対して静磁場が作用するスラブの連続鋳造設備 |
| DE102010022691A1 (de) * | 2010-06-04 | 2011-12-08 | Sms Siemag Ag | Stranggießvorrichtung mit einer Anordnung elektromagnetischer Spulen |
| KR101526454B1 (ko) * | 2013-11-22 | 2015-06-05 | 주식회사 포스코 | 전자기 교반 장치 및 교반 방법 |
| EP3154725A1 (de) * | 2014-06-16 | 2017-04-19 | ABB Schweiz AG | Nichtmagnetische stahlstruktur für ein stahl- oder aluminiumherstellungsverfahren |
| DE102015204123A1 (de) | 2014-07-04 | 2016-01-07 | Sms Group Gmbh | Vorrichtung zum Beeinflussen einer Strömung eines Flüssigmetalls innerhalb einer Stranggießkokille |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2628994B1 (fr) * | 1988-03-28 | 1992-04-03 | Vives Charles | Procede de production de gelees metalliques thixotropes par rotation d'un systeme d'aimants permanents dispose a l'exterieur de la lingotiere |
| KR930002836B1 (ko) * | 1989-04-27 | 1993-04-10 | 가와사끼 세이데쓰 가부시까가이샤 | 정자장을 이용한 강철의 연속 주조방법 |
| SE500745C2 (sv) * | 1991-01-21 | 1994-08-22 | Asea Brown Boveri | Sätt och anordning vid gjutning i kokill |
| AU714976B2 (en) * | 1996-04-29 | 2000-01-13 | Bhp Steel (Jla) Pty Limited | Magnetic braking |
| SE523157C2 (sv) * | 1997-09-03 | 2004-03-30 | Abb Ab | Förfarande och anordning för att styra metallflödet vid stränggjutning medelst elektromagnetiska fält |
| DE10146993A1 (de) * | 2001-09-25 | 2003-04-10 | Sms Demag Ag | Elektromagnetische Bremsvorrichtung für die Kokille einer Stranggießanlage |
-
2004
- 2004-11-26 CA CA002543600A patent/CA2543600A1/en not_active Abandoned
- 2004-11-26 ES ES04803301T patent/ES2287797T3/es not_active Expired - Lifetime
- 2004-11-26 EP EP04803301A patent/EP1694455B1/de not_active Expired - Lifetime
- 2004-11-26 DE DE502004004157T patent/DE502004004157D1/de not_active Expired - Lifetime
- 2004-11-26 WO PCT/EP2004/013444 patent/WO2005058530A1/de not_active Ceased
- 2004-11-26 JP JP2006544255A patent/JP2007534492A/ja active Pending
- 2004-11-26 AT AT04803301T patent/ATE365087T1/de active
- 2004-11-26 US US10/580,723 patent/US20070089851A1/en not_active Abandoned
- 2004-11-26 KR KR1020067006735A patent/KR20060120022A/ko not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005058530A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE365087T1 (de) | 2007-07-15 |
| ES2287797T3 (es) | 2007-12-16 |
| JP2007534492A (ja) | 2007-11-29 |
| US20070089851A1 (en) | 2007-04-26 |
| WO2005058530A1 (de) | 2005-06-30 |
| CA2543600A1 (en) | 2005-06-30 |
| KR20060120022A (ko) | 2006-11-24 |
| EP1694455B1 (de) | 2007-06-20 |
| DE502004004157D1 (de) | 2007-08-02 |
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