EP2218528B1 - Elektromagnetische spulenvorrichtung zur verwendung bei in der form geschmolzenem stahl, die sowohl als elektromagnetische rührvorrichtung als auch als elektromagnetische bremse dienen kann - Google Patents

Elektromagnetische spulenvorrichtung zur verwendung bei in der form geschmolzenem stahl, die sowohl als elektromagnetische rührvorrichtung als auch als elektromagnetische bremse dienen kann Download PDF

Info

Publication number
EP2218528B1
EP2218528B1 EP08848743.4A EP08848743A EP2218528B1 EP 2218528 B1 EP2218528 B1 EP 2218528B1 EP 08848743 A EP08848743 A EP 08848743A EP 2218528 B1 EP2218528 B1 EP 2218528B1
Authority
EP
European Patent Office
Prior art keywords
electromagnetic
coil
coil turns
mold
turns
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.)
Not-in-force
Application number
EP08848743.4A
Other languages
English (en)
French (fr)
Other versions
EP2218528A1 (de
EP2218528A4 (de
Inventor
Nobuhiro Okada
Kouji Takatani
Masayuki Kawamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel and Sumitomo Metal Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Steel and Sumitomo Metal Corp filed Critical Nippon Steel and Sumitomo Metal Corp
Publication of EP2218528A1 publication Critical patent/EP2218528A1/de
Publication of EP2218528A4 publication Critical patent/EP2218528A4/de
Application granted granted Critical
Publication of EP2218528B1 publication Critical patent/EP2218528B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • 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
    • H01F7/20—Electromagnets; Actuators including electromagnets without armatures

Definitions

  • the present invention relates to an electromagnetic coil system for in-mold molten steel that is capable of serving both as an electromagnetic stirrer and as an electromagnetic brake, for use in continuous casting of steel while controlling the flow of in-mold molten steel.
  • Electromagnetic stirring is known to have the effect of improving product quality, and is primarily used in the casting of high-grade materials.
  • electromagnetic braking is used to prevent a reduction in product quality resulting from re-melting of a solidified shell when the outlet flow of molten steel collides against a solidified shell on the narrow sides of the mold by applying a braking force to the molten steel outlet flow.
  • Electromagnetic braking is also used to increase the casting velocity by controlling the flow velocity of the molten steel flow below the meniscus.
  • electromagnetic brakes and electromagnetic stirrers are both provided with electromagnetic coils with windings around their magnetic cores disposed on the back side of the mold.
  • a core often employs iron, which is a ferromagnetic material, and is referred to as an iron core.
  • An electromagnetic steel plate is employed as a core in electromagnetic stirring, which uses alternating current, in order to reduce core loss due to electromagnetic induction.
  • a soft iron core is often used in an electromagnetic brake.
  • Patent Reference 1 Japanese Patent Application Kokai Publication No. 2007-007719
  • the geometry of the multi-function coil of the present invention is basically identical to that disclosed in Patent Reference 1.
  • the multi-function coil also employs an electromagnetic coil structure disclosed in Patent Reference 2.
  • Patent Reference 2 Japanese Patent Application Kokai Publication No. S60-044157
  • FIG. 10 shows a multi-function coil 1 as disclosed in Patent Reference 2 in which two coils 1 are arranged in a continuous manner on a wide side 2a of a mold 2.
  • This multi-function coil 1 employs a winding 1b (inner winding) around each two teeth 1aa, and a winding 1c (outer winding) around the outer side of the two teeth 1aa to form a single unit. Since the shape of the two teeth 1aa and the yoke 1ab forming a core 1a of this electromagnetic coil resembles the Greek letter ⁇ (pi), this multi-function coil 1 is called a pi-coil.
  • Reference Numeral 2b is a narrow side of the mold 2
  • Reference Numeral 3 is a back-up plate
  • Reference Numeral 4 is an immersion nozzle.
  • electromagnetic stirring capacity and electromagnetic braking capacity depend on the product of the current applied to the excitation coils and the number of coil turns. It is thus necessary to increase either the number of coil turns or the current, in order to enhance the performance of an electromagnetic coil system.
  • increasing the current requires an increase in the cross-sectional surface area of the windings, which results in a decrease in the number of coil turns. Therefore, increasing the number of coil turns is the primary condition for enhancing the performance of an electromagnetic coil system. The same is true for a multi-function coil.
  • the problem to be solved by the present invention is that in the multi-function coil previously disclosed by the applicant, since provided in a limited space between the two teeth a number of coil turns of the inner excitation coils was limited and, thus the electromagnetic stirring capacity and the electromagnetic braking capacity were also sometimes limited.
  • the present invention is directed to a multi-function coil which is an electromagnetic coil system for in-mold molten steel serving both as an electromagnetic stirrer and as an electromagnetic brake for use in continuous casting of steel by selectively applying electromagnetic stirring and electromagnetic braking on molten steel in a mold by applying a direct current or at least a 3-phase alternating current to an electromagnetic coil disposed around a wide side of a mold, the electromagnetic coil system comprising:
  • an electromagnetic coil system configured to serve as both an electromagnetic stirrer and as an electromagnetic brake
  • sufficient electromagnetic stirring performance and electromagnetic braking performance can be obtained, of course, if the required number of coil turns are provided around the inner excitation coil, and even if there is sufficient space, and the required windings cannot be accommodated.
  • the object of the present invention is to ensure both electromagnetic stirring performance and electromagnetic braking performance by optimizing the relationship between the number of coil turns of the outer winding and the inner winding.
  • excitation coils there are two types of excitation coils, namely, inner and outer excitation coils, unlike prior art electromagnetic coil systems used in electromagnetic stirrers and electromagnetic brakes. Also, while the number of coil turns is limited by the space between the teeth in the case of the inner excitation coil, there is spatial leeway for increasing the number of coil turns in the case of the outer excitation coil.
  • the number of possible coil turns can differ between the inner excitation coil and the outer excitation coil, but in the prior art, the relationship between the number of coil turns of the inner excitation coil and the outer excitation coil was not investigated.
  • the present inventors carefully studied the effect on multi-function coil performance when the number of coil turns of the outer excitation coil was varied with respect to the number of coil turns of the inner excitation coil which is limited by the interval between the teeth.
  • Performance of the multi-function coil includes the electromagnetic stirring capacity, which can be evaluated in terms of the stirring force resulting from the electromagnetic force generated in the molten steel. It also includes electromagnetic braking performance, which can be evaluated in terms of the magnitude of the electromagnetic flux applied to the molten steel.
  • the present inventors employed a computation model of electromagnetic field analysis to study changes in stirring force and electromagnetic flux density when the number of coil turns of the outer excitation coil was varied.
  • FIG. 1 shows a computation model of electromagnetic field analysis.
  • FIG. 1 (a) is a perspective view of the entire model.
  • FIG. 1 (b) is a horizontal sectional view.
  • FIG. 1 (c) is a vertical sectional view.
  • the numerals in the figure represent the dimensions (mm) of the parts of the model.
  • a non-magnetic stainless steel back-up plate 3 is disposed on the outer side of a copper mold 2, and an upper end of a core 1a is at the same height as the meniscus M.
  • the number of coil turns of the excitation core is between 40-60 for the inner winding and 40-120 for the outer winding.
  • alternating current is applied with a frequency of 4.0 Hz at 750 A.
  • direct current of 900 A is applied.
  • the coil current phases during electromagnetic stirring exhibit the same combinations of current phases as those disclosed in Japanese Patent Application No. 2007-150627 .
  • excitation coils (a) - (c), excitation coils (d) - (f), excitation coils (g) - (i), and excitation coils (j) - (l) each form one electromagnetic coil.
  • Excitation coils (a), (d), (g), and (j) are excitation coils which have the outer winding 1c to unify the two respective teeth 1aa.
  • Electromagnetic coils having the excitation coils (a) - (c) and the excitation coils (d) - (f) is disposed sequentially on one wide side 2a of the mold 2. Electromagnetic coils having the excitation coils (g) - (i) and the excitation coils (j) - (l) arranged on the other wide side 2a of the mold 2, are disposed facing the excitation coils (a) - (c) and the excitation coils (d) - (f).
  • phases U, V, and W having a phase difference of 120° in a 3-phase alternating current are applied to the excitation coils (a) - (l) at the inner winding 1b for the teeth 1aa of the electromagnetic coils in the sequence of the excitation coils, as shown in FIG. 2 .
  • -W, +V, +U, +W, -V, -U, -W, +U, +V, +W, -U, and -V are applied sequentially to the excitation coils (a) - (l).
  • FIG. 2 (b) -W, +V, +U, -V, +U, +W, +V, -W, -U, +W, -U, and -V are applied.
  • FIG. 3 is a graph showing the relationship between the number of coil turns of the outer excitation coil and the magnetic flux density at the center of mold thickness.
  • FIG. 3 indicates that the magnetic flux density increases proportionately with the number of coil turns of the outer excitation coil.
  • FIG. 4 is a drawing showing magnetic flux density distribution at the center of mold thickness:
  • FIG. 4 (a) illustrates a case where the number of coil turns of the inner and outer excitation coils is equal, with 60 coil turns each.
  • FIG. 4 (b) illustrates a case where the number of coil turns of the outer excitation coil is 100 coil turns, while that of the inner excitation coil is 60.
  • FIG. 4 shows contour lines with 10 equal intervals, starting with the maximum value for magnetic flux density.
  • FIG. 4 confirms that no great change in the magnetic flux density distribution occurs, even if the number of coil turns of the outer excitation coil is increased so as to exceed the number of coil turns of the inner excitation coil.
  • the present inventors studied the electromagnetic stirring capacity when the number of coil turns of the outer excitation coil was increased so as to exceed the number of coil turns of the inner excitation coil.
  • FIG. 5 is a graph showing the relationship between the number of coil turns of the outer excitation coil and the maximum stirring force generated within the mold.
  • FIG. 5 indicates that stirring force can be increased by increasing the number of coil turns of the outer excitation coil.
  • FIG. 6 is a graph showing the distribution of stirring force near the wide side of the mold when the number of coil turns of the outer excitation coil is varied.
  • the distribution of stirring force shown in FIG. 6 is at a position 5 mm from the wide side of the mold at the position of the meniscus of the molten steel.
  • the distribution of the stirring force is in the direction of the wide side at the position A-A' in FIG. 7 .
  • FIG. 6 indicates that if the number of coil turns of the outer excitation coil is reduced to 40 (broken line) versus 60 coil turns for the inner excitation coil, there is reduced stirring force in all regions on the wide side of the mold. On the other hand, if the number of coil turns of the outer excitation coil is increased to 120 (dotted line), the stirring force increases in the opposite direction at the left end of the wide side of the mold, and the stirring force is less than 0 even at the center of the mold, even though the maximum stirring force increases.
  • FIG. 8 is a graph showing the distribution of flow velocity of molten steel.
  • the solid line shows the case where the inner excitation coil has the ideal number of coil turns, namely 60 coil turns, and the and the outer excitation coil has 60 coil turns.
  • the broken line represents a case where there are 40 coil turns for the inner excitation coil, which is fewer than the ideal number of coil turns, and 100 coil turns for the outer excitation coil (the ratio of outer coil turn to inner coil turn is 2.5).
  • the flow velocity of molten steel shown in FIG. 8 represents measurements taken at a position 5 - mm from the wide side of the mold at position of the meniscus. Measurements are taken in the direction of the wide side at the position A-A' in FIG. 7 .
  • the flow velocity drops to 5 cm/sec at the center of the mold, but the flow velocity distribution is equivalent to that when the inner and outer excitation coils have an equal number of coil turns.
  • FIG. 9 is a graph showing the flow velocity distribution of molten steel.
  • the solid line is for 40 coil turns, which is fewer than the ideal number of coil turns for the inner excitation coil, and illustrates the case where the number of coil turns for the outer excitation coil is 120 (the ratio of outer coil turn to inner coil turn is 3).
  • the broken line represents the case where the inner and outer coil turns is equal, namely 40 coil turns.
  • FIG. 9 indicates that the flow velocity drops to below 0 at the center of the mold, when the number of coil turns for the inner excitation coil is lower than the ideal number, and the number of coil turns for the outer excitation coil is 3 times that of the inner excitation coil, even though the maximum flow velocity increases.
  • FIG. 9 also indicates that if the number of coil turns for the inner excitation coil is lower than the ideal number of coil turns, there is a large region in which the stirring force is insufficient and the flow velocity is on the order of 0, even if the number of coil turns of the inner and outer excitation coils is equal, and this is unsuitable for electromagnetic stirring.
  • the optimal number of coil turns for the excitation coils in a multi-function coil is an equal number of coil turns for the inner and outer excitation coils, in cases where it is possible to ensure a sufficient number of coil turns for the inner excitation coil.
  • the magnetic flux density is 3179 Gauss during electromagnetic braking, and 2465 Gauss if the number of coil turns is 40. It was determined that the present invention can realize a magnetic flux density of at least 3000 Gauss, which is sufficient to achieve suitable electromagnetic braking performance.
  • the present invention was devised on the basis of the above results of electromagnetic numerical analysis, can achieve sufficient electromagnetic stirring performance and electromagnetic braking performance.
  • the present invention is directed to an electromagnetic coil system for in-mold molten steel serving both as an electromagnetic stirrer and as an electromagnetic brake for use in continuous casting of steel by selectively applying electromagnetic stirring or electromagnetic braking on molten steel in a mold by applying a direct current or at least a 3-phase alternating current to an electromagnetic coil disposed around a wide side of a mold.
  • An electromagnetic coil which is connected to at least a 3-phase alternating current source and a direct current source, is provided two teeth extending from a yoke.
  • An inner winding is provided around the outer side of each of these two teeth, and an outer winding around the outside of the two teeth is provided with the inner windings, thereby uniting the two teeth.
  • the number of coil turns of the outer winding is equal to the number of coil turns of the inner winding, and if the number of coil turns of the inner winding is insufficient, then the number of coil turns of the outer winding is greater than and no more than 2.5 times the number of coil turns of the inner winding.
  • an n number of the electromagnetic coils are arranged on each wide side, where n is a natural number greater than or equal to 2, and a core of a magnetic material formed from the yoke and the teeth is disposed in a range extending in a vertical direction from a position of the meniscus of the molten steel and including the outlet port of the immersion nozzle.
  • the alternating current does not have to be 3-phase, and as long as the current phase difference varies from 90° to 120°, it can be a multi-phase alternating current of a higher order.
  • the present invention described above can be applied to continuous casting using a curved mold, a vertical mold, or any mold shape, as long as it involves continuous casting. Moreover, the present invention can be applied not only to continuous casting of slabs, but also to continuous casting of blooms.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Claims (2)

  1. Elektromagnetisches Spulensystem (1) für in der Form geschmolzenen Stahl, das sowohl als elektromagnetischer Rührer als auch als elektromagnetische Bremse dient, zur Verwendung beim Strangguss von Stahl durch selektives Anwenden von elektromagnetischem Rühren und elektromagnetischem Bremsen auf geschmolzenen Stahl in einer Form (2) unter Anlegen von Gleichstrom oder zumindest eines 3-phasigen Wechselstroms an eine elektromagnetische Spule, die um eine Breitseite (2a) einer Form (2) angeordnet ist, wobei das elektromagnetische Spulensystem umfasst:
    eine elektromagnetische Spule und eine Quelle für zumindest einen 3-phasigen Wechselstrom und eine Quelle für Gleichstrom,
    wobei die elektromagnetische Spule mit zwei Zähnen (1aa) versehen ist, die sich von einem Joch (1ab) erstrecken, und
    wobei eine Innenwicklung (1b) um eine Außenseite jedes der zwei Zähne (1aa) angeordnet ist und eine Außenwicklung (1c) um eine Außenseite der zwei Zähne (1aa) angeordnet ist, die mit den Innenwicklungen (1b) versehen sind, wodurch die zwei Zähne (1aa) vereint werden,
    wobei eine Anzahl von Spulenwindungen der Außenwicklung (1c) niedriger als oder gleich dem 2,5-Fachen einer Anzahl von Spulenwindungen der Innenwicklung (1b) ist, und
    wobei eine Anzahl n von elektromagnetischen Spulen auf jeder Breitseite (2a) einer Form (2) angeordnet ist, wobei n eine natürliche Zahl größer gleich 2 ist, und ein Kern (1a) aus einem magnetischen Material, der durch das Joch (1ab) und die Zähne (1aa) gebildet ist, in einem Bereich angeordnet ist, der sich in vertikaler Richtung von einer Position des Meniskus von geschmolzenen Stahl erstreckt und eine Austrittsöffnung des Tauchrohrs (4) enthält.
  2. Elektromagnetisches Spulensystem nach Anspruch 1,
    wobei die Anzahl von Spulenwindungen der Außenwicklung (1c) gleich der Anzahl von Spulenwindungen der Innenwicklung (1b) ist.
EP08848743.4A 2007-11-16 2008-10-10 Elektromagnetische spulenvorrichtung zur verwendung bei in der form geschmolzenem stahl, die sowohl als elektromagnetische rührvorrichtung als auch als elektromagnetische bremse dienen kann Not-in-force EP2218528B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007298484A JP5023989B2 (ja) 2007-11-16 2007-11-16 電磁攪拌・電磁ブレーキ兼用電磁コイル装置
PCT/JP2008/068486 WO2009063711A1 (ja) 2007-11-16 2008-10-10 電磁攪拌と電磁ブレーキを兼用可能な鋳型内溶鋼用の電磁コイル装置

Publications (3)

Publication Number Publication Date
EP2218528A1 EP2218528A1 (de) 2010-08-18
EP2218528A4 EP2218528A4 (de) 2014-01-08
EP2218528B1 true EP2218528B1 (de) 2015-06-24

Family

ID=40638564

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08848743.4A Not-in-force EP2218528B1 (de) 2007-11-16 2008-10-10 Elektromagnetische spulenvorrichtung zur verwendung bei in der form geschmolzenem stahl, die sowohl als elektromagnetische rührvorrichtung als auch als elektromagnetische bremse dienen kann

Country Status (6)

Country Link
EP (1) EP2218528B1 (de)
JP (1) JP5023989B2 (de)
KR (1) KR101207679B1 (de)
CN (1) CN101868311B (de)
BR (1) BRPI0820371B1 (de)
WO (1) WO2009063711A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014034658A1 (ja) * 2012-08-29 2014-03-06 新日鐵住金株式会社 電磁攪拌装置及び連続鋳造方法
CN107000049A (zh) * 2014-11-20 2017-08-01 Abb瑞士股份有限公司 金属制造过程中的电磁制动系统和控制熔融金属流动的方法
CN105014029A (zh) * 2015-07-08 2015-11-04 上海大学 可调磁场作用区域的板坯连铸电磁搅拌器
CN106466708A (zh) * 2015-08-21 2017-03-01 上海宝信软件股份有限公司 模块化的板坯结晶器电磁搅拌感应器及其制造方法
JP7247777B2 (ja) * 2018-06-22 2023-03-29 日本製鉄株式会社 鋼の連続鋳造方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6044157A (ja) 1983-08-17 1985-03-09 Sumitomo Metal Ind Ltd 電磁撹拌装置
CA2279909C (en) * 1997-12-08 2005-07-26 Nippon Steel Corporation Method for casting molten metal, apparatus for the same and cast slab
JP3700396B2 (ja) * 1998-06-16 2005-09-28 Ｊｆｅスチール株式会社 鋼の連続鋳造装置
JP3420966B2 (ja) * 1999-03-03 2003-06-30 新日本製鐵株式会社 溶融金属の連続鋳造装置
JP3965545B2 (ja) * 1999-06-28 2007-08-29 Ｊｆｅスチール株式会社 鋼の連続鋳造方法および装置
CN2504014Y (zh) * 2001-10-31 2002-08-07 宝山钢铁股份有限公司 连铸熔池液面波动的电磁制动装置
DE10237188A1 (de) * 2002-08-14 2004-02-26 Sms Demag Ag Elektromagnetische Bremsvorrichtung für in eine Stranggießkokille einströmende Stahlschmelze
CN1295043C (zh) * 2003-03-03 2007-01-17 新日本制铁株式会社 连续铸造用铸模
JP4438705B2 (ja) * 2005-07-04 2010-03-24 住友金属工業株式会社 鋼の連続鋳造方法
JP4779602B2 (ja) 2005-11-25 2011-09-28 パナソニック電工株式会社 通話装置

Also Published As

Publication number Publication date
CN101868311A (zh) 2010-10-20
BRPI0820371A2 (pt) 2015-05-12
CN101868311B (zh) 2012-11-28
WO2009063711A1 (ja) 2009-05-22
BRPI0820371B1 (pt) 2019-10-22
EP2218528A1 (de) 2010-08-18
EP2218528A4 (de) 2014-01-08
JP2009119515A (ja) 2009-06-04
KR20100080945A (ko) 2010-07-13
KR101207679B1 (ko) 2012-12-03
JP5023989B2 (ja) 2012-09-12

Similar Documents

Publication Publication Date Title
EP2216111B1 (de) Elektromagnetische spulenvorrichtung für strangguss-stahlschmelze zur verwendung als elektromagnetischer rührer sowie elektromagnetische bremse
EP2218528B1 (de) Elektromagnetische spulenvorrichtung zur verwendung bei in der form geschmolzenem stahl, die sowohl als elektromagnetische rührvorrichtung als auch als elektromagnetische bremse dienen kann
EP0880417B1 (de) Vorrichtung zum giessen in eine form
JP3725028B2 (ja) 連続鋳造用鋳型内の溶融金属の電磁制動装置
KR101332209B1 (ko) 예비 형강, 특히 예비 이중 ｔ 형강을 연속 주조하기 위한방법 및 그 장치
RU2539253C2 (ru) Способ и установка для регулирования потоков жидкого металла в кристаллизаторе для непрерывного литья тонких плоских слябов
EP2151291B1 (de) Stranggussverfahren für stahl und stahlschmelzenfluiditätssteuerung in der form
EP2794149A1 (de) Anordnung und verfahren zur flusssteuerung von metallschmelze in einem stranggiessverfahren
AU771606B2 (en) Equipment for supplying molten metal to a continuous casting ingot mould and method for using same
US6843305B2 (en) Method and device for controlling stirring in a strand
CA1155630A (en) Apparatus and method for electromagnetic stirring in a continuous casting installation
JP2005238276A (ja) 電磁攪拌鋳造装置
JP3102967B2 (ja) 連続鋳造用鋳型の溶湯の制動方法およびブレーキ兼用電磁撹拌装置
US6332493B1 (en) Device for continuous casting of two strands in parallel
JPS63119962A (ja) 電磁攪拌用ロ−ル装置
JPH04200849A (ja) 連続鋳造用電磁撹拌方法
US6929055B2 (en) Equipment for supplying molten metal to a continuous casting ingot mould
JP2009119516A (ja) 電磁攪拌・電磁ブレーキ兼用電磁コイル装置
SU1168325A1 (ru) Установка непрерывного лить металлов
WO1990011148A1 (en) In-mold electromagnetic stirring of molten metal during casting
JP2004042065A (ja) 電磁攪拌装置
JPH0137229B2 (de)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20100514

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

DAX Request for extension of the european patent (deleted)
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NIPPON STEEL & SUMITOMO METAL CORPORATION

A4 Supplementary search report drawn up and despatched

Effective date: 20131205

RIC1 Information provided on ipc code assigned before grant

Ipc: H01F 7/20 20060101ALI20131129BHEP

Ipc: H01F 3/00 20060101ALI20131129BHEP

Ipc: B22D 11/115 20060101AFI20131129BHEP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Ref document number: 602008038722

Country of ref document: DE

Free format text: PREVIOUS MAIN CLASS: B22D0011040000

Ipc: B22D0011115000

RIC1 Information provided on ipc code assigned before grant

Ipc: H01F 3/00 20060101ALI20141119BHEP

Ipc: B22D 11/115 20060101AFI20141119BHEP

Ipc: H01F 7/20 20060101ALI20141119BHEP

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20150109

RIN1 Information on inventor provided before grant (corrected)

Inventor name: TAKATANI, KOUJI

Inventor name: KAWAMOTO, MASAYUKI

Inventor name: OKADA, NOBUHIRO

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 732683

Country of ref document: AT

Kind code of ref document: T

Effective date: 20150715

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602008038722

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150924

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150924

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150925

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20150624

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150624

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20151024

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20151026

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602008038722

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20151010

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

26N No opposition filed

Effective date: 20160329

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20151010

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151010

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151031

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151010

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

REG Reference to a national code

Ref country code: AT

Ref legal event code: UEP

Ref document number: 732683

Country of ref document: AT

Kind code of ref document: T

Effective date: 20150624

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20081010

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20150624

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 602008038722

Country of ref document: DE

Representative=s name: PATENTANWALTSKANZLEI MEYER, DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 602008038722

Country of ref document: DE

Owner name: NIPPON STEEL CORPORATION, JP

Free format text: FORMER OWNER: NIPPON STEEL & SUMITOMO METAL CORP., TOKYO, JP

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20190913

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20190924

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20191009

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20190925

Year of fee payment: 12

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602008038722

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 732683

Country of ref document: AT

Kind code of ref document: T

Effective date: 20201010

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201031

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201010

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201010