EP0119853B1 - A tundish provided with a heating device for molten steel - Google Patents

A tundish provided with a heating device for molten steel Download PDF

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Publication number
EP0119853B1
EP0119853B1 EP84301814A EP84301814A EP0119853B1 EP 0119853 B1 EP0119853 B1 EP 0119853B1 EP 84301814 A EP84301814 A EP 84301814A EP 84301814 A EP84301814 A EP 84301814A EP 0119853 B1 EP0119853 B1 EP 0119853B1
Authority
EP
European Patent Office
Prior art keywords
tundish
channel
heating device
induction
core member
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.)
Expired
Application number
EP84301814A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0119853A2 (en
EP0119853A3 (en
Inventor
Tsunehiro C/O Chiba Works Ueda
Akihiko C/O Chiba Works Ohara
Mitsuru C/O Chiba Works Sakurai
Yutaka C/O Chiba Works Yoshii
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.)
JFE Steel Corp
Original Assignee
Kawasaki Steel 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Publication of EP0119853A2 publication Critical patent/EP0119853A2/en
Publication of EP0119853A3 publication Critical patent/EP0119853A3/en
Application granted granted Critical
Publication of EP0119853B1 publication Critical patent/EP0119853B1/en
Expired legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
    • B22D41/01—Heating means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/16—Furnaces having endless cores
    • H05B6/20—Furnaces having endless cores having melting channel only

Definitions

  • This invention relates to a tundish provided with a heating device for molten metal, and more particularly to a tundish for continuous casting provided with a channelled induction-heating device for molten steel according to the preamble of claim 1.
  • molten steel is poured from a refining vessel such as a converter into a ladle, which is transported and poured into a tundish for continuous casting. Then, the molten steel is poured into a mold through an immersion nozzle disposed in the bottom of the tundish. Therefore, the temperature of the molten steel necessarily lowers whilst it is being transported from the ladle to the mold via the tundish. Since the pouring temperature is very important in continuous casting, however, it is desirable to use a tundish provided with a heating device for the molten steel considering that the temperature of the molten steel in the tundish may fall below the predetermined pouring temperature.
  • an induction-heating furnace As the heating device for molten pig iron or molten steel, there is used a low-frequency channelled induction-heating furnace usually called an Ajax-Wyatt furnace. Such an induction-heating furnace has been known for a long time in the iron and steel field and is mainly used as a holding furnace for foundry pig iron. However, when such a holding furnace is used with a tundish in continuous casting of molten steel, the following fundamentally great differences are to be noted:
  • Fig. 1 of the accompanying drawings there is shown a section through a tundish provided with a conventional channelled induction-heating device as mentioned above, which is also shown in Fig. 2 as a plan view.
  • a channelled induction-heating device 1 is attached to a tundish 3 for continuous casting at a position near the bottom of the sidewall by means of a flange 5a of a shell wall 5 and a flange 7a of a shell wall 7.
  • the induction-heating device 1 comprises an iron core 9 and a heating coil 11 wound around the iron core 9.
  • a through-hole 13 which receives the iron core 9 and which is surrounded by the heating coil 11.
  • the inside of the shell wall 7 defining the device 1 is filled with a refractory material 15 containing a channel 17 therein.
  • the channel 17 has a U-shape in plan surrounding the through-hole 13, both openings of which channel 17 communicate with an opening 19 of the tundish 3 formed in the shell wall 5 and refractory lining 21.
  • the heating coil 11 is connected at both ends to water-cooled feed cables 23 and 25.
  • the channel 17 is filled with molten steel 27 to form a closed loop (corresponding to a secondary induction coil). Further, molten steel 27 is heated to a predetermined temperature in the channel 17 by applying a voltage to the heating coil 11 (corresponding to a primary induction coil) through the cables 23, 25, while molten steel 27 can be returned back to the tundish 3 through the channel 17 by the convection caused by electromagnetic heating.
  • a voltage to the heating coil 11 corresponding to a primary induction coil
  • Tundishes of the above type are disclosed in Japanese Utility Model Laid Open No. 57-182099 upon which the preamble of claim 1 is based, and Japanese Patent Laid Open No. 58-35050. It is an object of the invention to solve the aforementioned problems possessed by such tundishes and to provide an effective construction of a tundish for continuous casting provided with a channelled induction-heating device.
  • GB-A-757 152 discloses a low frequency induction furnace comprising a crucible for molten metal which includes an annular chamber at one end for initiating the heat treatment of the metal.
  • the annular chamber surrounds a core including a lower part around which is wound a copper coil and an upper part which can be removed to allow access to the chamber.
  • the annular chamber is an integral part of the crucible.
  • a tundish for continuous casting molten metal comprising a tundish body for containing the molten metal and a channelled induction-heating device for heating the molten metal which device includes an iron core and a heating coil wound around said iron core wherein the device it attached to a sidewall of the tundish body and includes a channel which communicates with an opening in the sidewall characterised in that in order to enable removal, for transport, of the tundish from said device which is fixed on a tundish car said iron core is in the form of a split assembly composed of an upper core member and a lower core member with the heating coil wound around said lower core member.
  • Fig. 3 there is shown a first embodiment of a tundish provided with a chanelled induction-heating device according to the invention, which has the same construction as the conventional tundish of Fig. 1, except that the iron core 9 is divided into an upper core member 9a and a lower core member 9b and the heating coil 11 is wound around the lower core member 9b as shown in Fig. 3.
  • the core members 9a, 9b are assembled with each other to form the iron core assembly 9 in use, so that the water-cooled feed cables 23, 25 can be always kept connected to the heating coil 11 without ever needing to be detached.
  • Fig. 4 is shown an example of the manner in which the tundish of Fig. 3 is mounted onto a tundish car in actual operation.
  • the tundish car 30 comprises a car frame 32 provided at its bottom with a plurality of travelling wheels 34, a pair of cylinders 36 arranged upright on both side portions of the car frame 32, and a frame 38 moveable up and down by the cylinders 36.
  • the tundish 3 When the tundish 3 is mounted on the frame 38, it can be elevated up to a highest position as shown by phantom lines in Fig. 4.
  • the upper core member 9a and the lower core member 9b defining the iron core assembly 9 are kept in the assembled state during operation of the tundish 3, the upper core member 9a is first detached from the assembled state by means of a crane (not shown) when the tundish 3 is elevated upward after use, while the lower core member 9b is kept on the support stand 40 disposed on the car frame 32. Therefore, the water-cooled feed cables 23, 25 connected to the heating coil 11 surrounding the lower core member 9b are kept connected even when the upper core member 9a is detached.
  • cables 23, 25 are connected to power and water sources (not shown) by a connecting member 42 fixed to one end of the car frame 32 and a pulley 44 supported by a guide rail 46. Since these cables can not be bent to a small radius of curvature, they are properly fixed along the car frame 32.
  • the iron core to be used in the channelled induction-heating device is a split-type iron core assembly composed of an upper core member and a lower core member, so that the removal of the iron core from the induction-heating device is very easy when repairing the tundish and the heating device.
  • a tundish provided with a channelled heating device which has the same construction as the conventional tundish of Fig. 1, except that the channel formed in the induction-heating device is opened at its upper portion to the atmosphere, leaving a part of the channel near the sidewall of the tundish body closed.
  • the channel 17 formed in the refractory material 15 is always in a closed state in the induction-heating device 1 attached to the conventional tundish.
  • a core is first set in the shell wall 5 at a position corresponding to the formation of a channel 17a and then the refractory material 15 is incorporated in the whole of the shell wall 5 and thereafter the core is dissolved from the refractory material 15 or otherwise removed thereform, whereby the upper portion of the channel 17a is open to the atmsophere so as to leave only part of the channel 17a near the side wall of the tundish closed.
  • Figs. 5A to 5C a core is first set in the shell wall 5 at a position corresponding to the formation of a channel 17a and then the refractory material 15 is incorporated in the whole of the shell wall 5 and thereafter the core is dissolved from the refractory material 15 or otherwise removed thereform, whereby the upper portion of the channel 17a is open to the atmsophere so as to leave only part of the channel
  • the portion of the refractory material 15 closing the channel 17a has a size denoted by y and z sufficient to support the upper portion of the remaining island-like refractory material 15 having the through-hole 13 for the iron core 9 therein without wobbling.
  • the channel 17a may be covered with a lid (not shown) instead of being kept in the open state or the upper portion of the open channel 17a may be covered with a refractory wool instead of the lid.
  • the channel is substantially open at its upper portion, so that for example inspection, preheating and local repairing of the refractory material in the channel are very easy.
  • the channelled induction-heating device includes both the split-type iron core assembly and the open channel whereby the repair of this device can be performed even more easily.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • General Induction Heating (AREA)
  • Furnace Details (AREA)
  • Continuous Casting (AREA)
EP84301814A 1983-03-18 1984-03-16 A tundish provided with a heating device for molten steel Expired EP0119853B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP39165/83U 1983-03-18
JP1983039165U JPS59143559U (ja) 1983-03-18 1983-03-18 溶鋼加熱装置付き連鋳タンデイツシユ

Publications (3)

Publication Number Publication Date
EP0119853A2 EP0119853A2 (en) 1984-09-26
EP0119853A3 EP0119853A3 (en) 1985-05-22
EP0119853B1 true EP0119853B1 (en) 1988-12-07

Family

ID=12545506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84301814A Expired EP0119853B1 (en) 1983-03-18 1984-03-16 A tundish provided with a heating device for molten steel

Country Status (5)

Country Link
EP (1) EP0119853B1 (enrdf_load_stackoverflow)
JP (1) JPS59143559U (enrdf_load_stackoverflow)
KR (1) KR900003546Y1 (enrdf_load_stackoverflow)
AT (1) ATE39072T1 (enrdf_load_stackoverflow)
DE (1) DE3475491D1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10159306A1 (de) * 2001-12-04 2003-06-12 Induga Industrieoefen Und Gies Induktiv heizbares Gefäß für metallisches Schmelzgut und Verwendung dieses Gefäßes

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE455675B (sv) * 1985-02-21 1988-08-01 Asea Ab Anordning for vermning av mellanskenkar for kontinuerlig gjutning
JPH01224151A (ja) * 1988-03-04 1989-09-07 Kawasaki Steel Corp タンディッシュ溶鋼加熱装置の操業後の冷却方法
US5192488A (en) * 1989-11-09 1993-03-09 Fuji Electric Co., Ltd. Apparatus for heating molten in a ladle
JP2692367B2 (ja) * 1989-11-09 1997-12-17 富士電機株式会社 取鍋の浴湯加熱装置
DE10058681B4 (de) * 2000-11-25 2006-02-23 Inductotherm Coating Equipment S.A. Metallurgisches Gefäß zur Aufnahme einer Schmelze, Verfahren zum Wechsel einer Induktionsheizeinrichtung eines metallurgischen Gefäßes und Stopfen zum Verschließen eines Verbindungskanals
GB2459509B (en) 2008-04-25 2011-05-11 Goodwin Plc An apparatus for casting and a method of casting
DE102014119109B4 (de) 2014-12-18 2018-12-13 Voestalpine Stahl Gmbh Verteiler für Stranggießanlagen
CN108339969A (zh) * 2017-04-14 2018-07-31 上海新研工业设备股份有限公司 分离式沟槽感应器
DE102023132701B3 (de) 2023-11-23 2025-03-20 Voestalpine Stahl Gmbh Stranggießanlage, Verteiler für Stranggießanlagen und Verfahren zum Stranggießen
WO2025109084A1 (de) 2023-11-23 2025-05-30 Voestalpine Stahl Gmbh VERFAHREN ZUM VERGIEßEN VON STAHL UND VERTEILER HIERFÜR

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57182099U (enrdf_load_stackoverflow) * 1981-05-14 1982-11-18
JPS5835050A (ja) * 1981-08-25 1983-03-01 Kawasaki Steel Corp 溶湯の加熱機能を有する連続鋳造用タンデイツシユ

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB757152A (en) * 1954-07-05 1956-09-12 Aldo Tagliaferri Improvements in or relating to electric induction furnaces
US2888506A (en) * 1957-06-17 1959-05-26 Lindberg Eng Co Salt bath furnace
DE1215833B (de) * 1962-11-14 1966-05-05 Bbc Brown Boveri & Cie Induktions-Rinnen- oder Ring-Tiegelofen
DE1815265A1 (de) * 1968-12-18 1970-02-26 Bbc Brown Boveri & Cie Giessverfahren und Einrichtung fuer induktiv beheizte Stopfenpfanne
JPS5857444B2 (ja) * 1977-07-20 1983-12-20 大阪曹達株式会社 電解用陽イオン交換膜

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57182099U (enrdf_load_stackoverflow) * 1981-05-14 1982-11-18
JPS5835050A (ja) * 1981-08-25 1983-03-01 Kawasaki Steel Corp 溶湯の加熱機能を有する連続鋳造用タンデイツシユ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10159306A1 (de) * 2001-12-04 2003-06-12 Induga Industrieoefen Und Gies Induktiv heizbares Gefäß für metallisches Schmelzgut und Verwendung dieses Gefäßes

Also Published As

Publication number Publication date
DE3475491D1 (en) 1989-01-12
EP0119853A2 (en) 1984-09-26
EP0119853A3 (en) 1985-05-22
JPS59143559U (ja) 1984-09-26
ATE39072T1 (de) 1988-12-15
KR900003546Y1 (en) 1990-04-28
JPS6347399Y2 (enrdf_load_stackoverflow) 1988-12-07

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