EP0234572B1 - Metallurgisches Gefäss - Google Patents

Metallurgisches Gefäss Download PDF

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Publication number
EP0234572B1
EP0234572B1 EP19870102704 EP87102704A EP0234572B1 EP 0234572 B1 EP0234572 B1 EP 0234572B1 EP 19870102704 EP19870102704 EP 19870102704 EP 87102704 A EP87102704 A EP 87102704A EP 0234572 B1 EP0234572 B1 EP 0234572B1
Authority
EP
European Patent Office
Prior art keywords
outlet part
casting
container
valve
melt
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
EP19870102704
Other languages
English (en)
French (fr)
Other versions
EP0234572A1 (de
Inventor
Bo Gustafsson
Hans-Gunnar Larsson
Allan Lettermo
Tor Olov Norrman
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Publication of EP0234572A1 publication Critical patent/EP0234572A1/de
Application granted granted Critical
Publication of EP0234572B1 publication Critical patent/EP0234572B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1509—Tapping equipment
    • 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
    • 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
    • B22D41/50—Pouring-nozzles
    • B22D41/60—Pouring-nozzles with heating or cooling 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
    • H05B6/22—Furnaces without an endless core
    • 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
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/02—Stirring of melted material in melting furnaces

Definitions

  • the invention relates to a metallurgical container according to the precharacterising part of claim 1.
  • a metallurgical container of this kind is previously known from the US-A-4 243 092.
  • the container can be a ladle, tundish, casting box or furnace.
  • the mould In horizontal continuous casting machines and also in other types of continuous casting machines, the mould is arranged so as to be connected to one side of the casting box.
  • a sliding valve In order to be able rapidly to exchange moulds in the event of a disturbance, a sliding valve is mounted between the mould and the casting box and is normally fixed to the casting box.
  • One problem in this connection is that upon start-up and in the case of long shutdown periods, the steel or other metal solidifies in front of the sliding valve, among other things because of heavy heat losses to the lining, which makes it impossible to start up or restart the casting process.
  • the casting box may sometimes be formed as a crucible furnace with the lowermost coil turns located below the outlet. However, also in such a design there is a risk of freezing at the end of the outlet.
  • the metallurgical container disclosed in the US-A-4 243 092 is a tundish from the bottom of which protrudes a vertical casting pipe that extends into a mould vertically arranged under the container.
  • the casting pipe is surrounded by a stirrer generating a rotating electromagnetic field that causes a rotative movement of the melt while flowing down through the casting pipe 4.
  • There is no valve near the outlet end of the casting pipe which would allow to completely interrupt the flow of melt through the casting pipe.
  • an electromagnetic valve placed at the lower portion of the casting pipe that serves to control the level of molten metal in the mould.
  • This valve is neither intended for nor capable of completely interrupting the flow of melt through the casting pipe.
  • the CH-A-444 390 discloses a container for molten metal with a tube-like outlet portion provided with a sliding valve. To prevent the molten metal from getting into contact with the sliding valve prior to casting, the outlet portion is provided with a filling material of solid state. The outlet channel portion that accommodates the solid filling material is surrounded by a heating device. The purpose of this heating device, the nature of which is not disclosed, is merely to melt the solid filling material immediately before the beginning of the casting.
  • JP-A-59-30468 shows a metallurgical container with a relatively short tubular outlet nozzle which is equipped with a sliding valve. This valve is positioned very close to the bottom of the container thus preventing the lower portion of the outlet pipe from becoming clogged by frozen metal or being subjected to the hydrostatic pressure of the melt.
  • melt remains only in the relatively short upper portion of the outlet pipe that penetrates the wall of the metallurgical container.
  • a electric coil is arranged to inductively heat the melt in said upper portion of the outlet pipe. No stirring of the melt in this outlet part portion is provided.
  • the invention aims to provide a metallurgical container which can be completely shut near the lower end of the outlet part without the hazard of metal freezing in the outlet part or a rupture of the outlet part due to the high hydrostatic pressure.
  • the invention suggests a metallurgical container according to the introductory part of claim 1, which is characterized by the features of the characterizing part of claim 1.
  • the heating device is extended to such an extent that an induction coil with the necessary power is able to surround the molten metal part, the so-called “tail", thus arising.
  • the molten metal can be heated, and usually stirred, in the outlet part to prevent freezing therein.
  • the heating device consists at least of 1 inductive heating coil positioned between the container and a valve, such as a sliding valve, and is formed as a tubular outlet part.
  • the outlet part is reinforced tangentially and/or radially, which is important, among other things, because of the great hydrostatic pressure which often prevails in the outlet part of the container.
  • the outlet part may be vertical, extending from the bottom of the container, or horizontal, or inclined, extending from the lower part of the ladle.
  • the inclination of the outlet part defined by the angle'alpha in Figure 1 may vary.
  • a desirable location is at the bottom of conventional casting ladles in order to obtain, in combination with a sliding valve, a reliable opening mechanism.
  • Figure 1 shows a casting container in the form of a ladle, tundish or furnace 1 for continuous casting which is provided with an inclined outlet part 2 connected to the bottom of the container.
  • the angle of inclination, alpha may be set optionally at different values; h represents the ferrostatic pressure.
  • an induction coil 3 Around the outlet part 2, which is tubular, made of a refractory compound, and suitably reinforced tangentially and/or radially, there is arranged an induction coil 3.
  • the induction coil 3 may also be made integral with the tubular outlet part 2.
  • the reinforcement of the outlet part 2 may be made in accordance with EP-A-85 10 1148.6. This reinforcement is important in view of the considerable ferrostatic pressure.
  • the inclination of the channel with the heater i.e. the outlet part 2 may vary. It is combined with a valve, for example a sliding valve 4.
  • the outlet part 2 and the sliding valve 4 are connected to a device according to the SE-A-8505505-1 (EP-A-86 11 5969.7), comprising a horizontal casting mould 5.
  • a device according to the SE-A-8505505-1 EP-A-86 11 5969.7
  • Around this mould 5 there is arranged at least one electromagnetic stirrer (not shown) developing at least one component of force in the casting direction in order to improve the casting structure.
  • FIG 2 shows a casting ladle 6 having a vertical outlet part 7. Also in this case the ladle may be designed in the same way as above (see Figure 1).
  • the outlet part is formed with a surrounding or integral induction coil 8 around the tubular body 7 of a refractory material.
  • the induction heater should not be mounted on the ladle 6 but at the casting station and in such a way that the "casting tail" of the ladle 6, when brought in proper position in relation to the induction heater, adopts a casting position. However, the heater can also be made movable and be located around the "casting tail" afterwards.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Engineering & Computer Science (AREA)
  • General Induction Heating (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)

Claims (4)

1. Metallurgischer Behälter, z.B. eine Pfanne, eine Gießwanne, ein Gießkasten oder ein Ofen, der mit einem rohrförmigen Austrittsteil (2) versehen ist, welches von einer Vorrichtung zum Rühren des gescholzenen Metalls im Ausgießteil umgeben ist, dadurch gekennzeichnet, daß ein Absperrorgan (4), mit welchem der Schmelzenstrom vollständig unterbrochen werden kann, beispielsweise ein Schieber, in der Nähe des Austrittsendes des Austrittsteils (2) angeordnet ist, daß das rohrförmige Austrittsteil mit tangentialen und/oder axialen Verstärkungsvorrichtungen derart versehen ist, daß es dem hydrostatischen Druck der Schmelze widersteht, und daß die Rührvorrichtung zumindest aus einer induktiven Heizspule besteht, die ein induktives Rühren und ein Heizen der Schmelze in dem genannten Austrittsteil herbeizuführen vermag, wenn das genannte Ventil geschlossen ist.
2. Metallurgischer Behälter nach Anspruch 1, dadurch gekennzeichnet, daß zumindest eine induktive Heizspule zwischen dem Behälter und dem Ventil (4, 16) angeordnet ist.
3. Metallurgischer Behälter nach Anspruch 1 oder 2 dadurch gekennzeichnet, daß das genannte rohrförmige Austrittsteil als ein integraler Bestandteil (2, 7) des Behälters ausgebildet ist.
4. Metallurgischer Behälter nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das rohrförmige Austrittsteil aus einem Abschnitt aus feuerfestem Material mit einer integrierten Spule besteht.
EP19870102704 1986-02-27 1987-02-25 Metallurgisches Gefäss Expired EP0234572B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8600876 1986-02-27
SE8600876A SE457619B (sv) 1986-02-27 1986-02-27 Utloppsvaermare foer skaenk eller annan matallurgisk behaallare

Publications (2)

Publication Number Publication Date
EP0234572A1 EP0234572A1 (de) 1987-09-02
EP0234572B1 true EP0234572B1 (de) 1991-05-08

Family

ID=20363607

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870102704 Expired EP0234572B1 (de) 1986-02-27 1987-02-25 Metallurgisches Gefäss

Country Status (4)

Country Link
EP (1) EP0234572B1 (de)
JP (1) JPS62267063A (de)
DE (1) DE3769811D1 (de)
SE (1) SE457619B (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2629299A1 (fr) * 1988-03-23 1989-09-29 Commissariat Energie Atomique Systeme de brassage de matiere fondue
GB9008538D0 (en) * 1990-04-17 1990-06-13 Rolls Royce Plc A launder system for supplying molten metal and a launder nozzle
US5202081A (en) * 1990-04-17 1993-04-13 Rolls-Royce Plc Launder system for supplying molten metal and a launder nozzle
US5939016A (en) * 1996-08-22 1999-08-17 Quantum Catalytics, L.L.C. Apparatus and method for tapping a molten metal bath
IT1289009B1 (it) * 1996-10-21 1998-09-25 Danieli Off Mecc Dispositivo di spillaggio per forno elettrico ad arco, forno siviera o paniera e relativo procedimento di spillaggio
DE19651533C2 (de) * 1996-12-11 1999-01-14 Didier Werke Ag Verfahren zur Verhinderung von Ansätzen in metallurgischen Gefäßen
ES2168930B2 (es) * 1999-12-23 2003-06-16 Fundacion Inasmet Horno de colada para moldeo
CN103398588B (zh) * 2013-07-26 2015-02-04 朱兴发 电磁感应矿渣熔炉底流式流量可控的电热石墨水口装置
CN109334390B (zh) * 2018-11-06 2024-02-02 海宁托博特种陶瓷制品有限公司 氮化硅发热体与铝件压铸或浇筑一体成型装置
CN115261556A (zh) * 2022-06-13 2022-11-01 河钢股份有限公司承德分公司 钢水均匀合金化生产装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2225373A (en) * 1937-07-29 1940-12-17 Norman P Goss Method and apparatus for casting metal
DE1049547B (de) * 1956-12-12 1959-01-29 Bochumer Ver Fuer Gussstahlfab Vorrichtung zum elektrisch gesteuerten Vergiessen von Metall
GB913029A (en) * 1960-05-21 1962-12-12 Asea Ab Low frequency induction furnace of the melting channel type
CH444390A (de) * 1966-08-30 1967-09-30 Interstop Ag Verfahren zum Vergiessen von Metallen aus einem Giessgefäss mit Schiebeverschluss
SE410284B (sv) * 1978-02-10 1979-10-08 Asea Ab Forfaringssett for omrorning av metalliska smelta samt anordning for genomforande av detta forfaringssett
SE452190B (sv) * 1984-02-06 1987-11-16 Asea Ab Skenk eller vermare (tundish) for induktiv vermning och/eller omroring av metalliska smeltor sasom stal

Also Published As

Publication number Publication date
EP0234572A1 (de) 1987-09-02
DE3769811D1 (de) 1991-06-13
JPS62267063A (ja) 1987-11-19
SE8600876L (sv) 1987-08-28
SE457619B (sv) 1989-01-16
SE8600876D0 (sv) 1986-02-27

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