EP0050581A1 - Procédé et installation pour la fabrication continue d'ébauches creuses en métal - Google Patents

Procédé et installation pour la fabrication continue d'ébauches creuses en métal Download PDF

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Publication number
EP0050581A1
EP0050581A1 EP81630059A EP81630059A EP0050581A1 EP 0050581 A1 EP0050581 A1 EP 0050581A1 EP 81630059 A EP81630059 A EP 81630059A EP 81630059 A EP81630059 A EP 81630059A EP 0050581 A1 EP0050581 A1 EP 0050581A1
Authority
EP
European Patent Office
Prior art keywords
metal
branch
liquid metal
primary
blank
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.)
Withdrawn
Application number
EP81630059A
Other languages
German (de)
English (en)
French (fr)
Inventor
Paul Metz
Norbert Kaell
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.)
Arcelor Luxembourg SA
Original Assignee
Arbed SA
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 Arbed SA filed Critical Arbed SA
Publication of EP0050581A1 publication Critical patent/EP0050581A1/fr
Withdrawn legal-status Critical Current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
    • B22D11/14—Plants for continuous casting
    • B22D11/145—Plants for continuous casting for upward casting
    • 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
    • B22D11/006—Continuous casting of metals, i.e. casting in indefinite lengths of tubes
    • 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

Definitions

  • the present invention relates to a continuous manufacturing process for hollow metal blanks, in particular steel tubes, as well as to the installation necessary for carrying out the process.
  • An electric furnace or a pocket contains liquid metal and are on their side inside an enclosure which can be closed hermetically.
  • the enclosure includes the accessories necessary for the introduction of a gas, serving to increase the pressure inside the enclosure, as well as an ascending duct through which the metal is evacuated thanks to the pressure created, for be solidified in an ingot mold and continuously extracted after solidification.
  • Another technique provides for bringing the liquid metal continuously through a conduit inside a pocket which is in a hermetically sealed enclosure and which comprises a second conduit 'through which the metal is evacuated by ferrosta pressure - created tick, to be solidified in an ingot mold and continuously extracted.
  • the depositor has mi.s to the point a process which he described in the Luxembourg patent no. 79.444 and which provides for continuously or discontinuously bringing liquid metal into a sealed container, creating inside this container sufficient pressure to discharge the metal to a continuous casting mold where the metal is solidified gradually and ascendingly extract a hollow blank.
  • This method also provides that the vein full of ascending liquid metal is electromagnetically rotated around the axis of the mold. The rotation is preferably most intense at the location of the mold where the metal solidification process begins.
  • This rotation of the liquid metal in the process of solidification produces a dynamic effect which causes a concentration of the particles of impurities in the center of the metallic mass in rotation, according to the principle of centrifugation, and a geometric effect which consists in an elevation of the edges of the surface of the liquid metal.
  • the dynamic effect is responsible for the excellent results from the point of view of the contents of inclusions of the tubes manufactured according to the process according to the invention, while the geometric effect, which is manifested by an elevation of the edges of the surface of the metal in rotation , results in an accelerated and controllable solidification of the metal taking the form of the tube to be extracted from the mold.
  • the object of the present invention was to provide a method for manufacturing hollow blanks, free from the difficulties described.
  • the idea which is the basis of the present invention consists in finding an original, simple and valid means for ensuring that there is in the region of the blank extraction a constant level.
  • a metal vein in the shape of a "U” a system of communicating vessels is implemented which makes it possible to avoid the use of pressurizable chambers which cause sealing problems. and prevent or at least make difficult the vertical oscillation maneuvers. Indeed, it should be noted that the absence of a possibility of oscillation leads during extraction to surface defects, due to the momentary rupture of the solidified carcass.
  • this problem is avoided by oscillating the entire system, i.e. that we oscillate the vein in the shape of "U" and that a constant tensile force is exerted on the blank.
  • the rotation of the liquid metal in the process of solidification does not only play the role of a means of raising the edges of the level of the metal, but in addition that of a means of repair during the rupture of the carcass , by instantaneous supply of additional liquid metal.
  • the exterior surface of the cold branch is cooled essentially in two ways: At the place where it is intended to initiate the solidification of the metal, the latter is cooled by means of a cold surface , in this case by contacting the wall of a water-cooled ingot mold. On the other hand, secondary cooling by means of a cooling fluid is carried out following primary cooling by direct contact.
  • the method according to the invention provides for essentially using 2 distinct electromagnetic fields: In fact it is planned to subject the metal to the place where solidification begins and therefore to the place where the primary cooling acts, at action of a primary electromagnetic field, which is created using an inductor supplied with current of a frequency less than 15 Hz.
  • the secondary electromagnetic field is created by an inductor which is supplied with current of frequency of the network, therefore of 50 Hz. This influences the price of the installation favorably, since the inductors with frequency of 50 Hz. Are definitely less expensive than lower frequency inductors.
  • the installation necessary for the implementation of the method according to the invention consists in particular of a conduit in the shape of a "U", in refractory material, one of the branches of the conduit comprising an ingot mold cooled with water and provided with a primary electromagnetic inductor with a frequency less than 15 Hz above which is a secondary inductor with a frequency of 50 Hz .; said branch further comprising a series of extraction rollers resp. guide as well as a spraying system by fluid jets, while the other branch, of larger diameter is di.sposé under a liquid metal supply source, the entire conduit resting on a movable table provided with means vertical oscillation.
  • the inductor is placed in the water cooling circuit of the mold.
  • the ingot mold is preferably made of copper, copper alloy, non-magnetic alloy cast iron or graphite.
  • fig.1 represents a diagrammatic section through a possible embodiment of the installation according to the invention and which has no li character. mitative.
  • the diameter of the cold branch is obviously smaller than that of the hot branch (1), because the addition of fresh liquid metal in the branch (1) will affect the level of metal in the cold branch and that the quantity high metal content in the branch (1) is likely to attenuate the effects due to a possibly irregular addition.
  • the metal which is conveyed to the cold branch is kept in the liquid state by heating means (50), eg by induction, to avoid premature solidification which would be absolutely harmful.
  • this inductor (20) must be a low frequency inductor, preferably less than 15 Hz.
  • Above the ingot mold (10) is the lubrication ring ( 5).
  • the solidification of the metal is initiated at the level of the mold (10); the speed of solidification depending of course on the intensity of cooling, the speed of extraction as well as the speed of rotation that is printed on the liquid metal, the shape of the solidified profile may differ of the pace shown.
  • the solidified blank (2) leaving the ingot mold still contains liquid metal, the level of which necessarily corresponds to that which is established in the branch (1). It is at this level that the secondary inductor (30) is located, which gives the relatively thin column of liquid metal a rotational movement such that the meniscus is formed there (4), deep.
  • rollers (3) for extracting and guiding the blank There are the rollers (3) for extracting and guiding the blank; the independent extraction means, in the form of a mandrel with extendable head, is not shown.
  • the solidified part of the blank is subjected to secondary cooling by a system (40) of jets of a fluid, eg water.
  • a system (40) of jets of a fluid eg water.
  • rollers (3) for driving and guiding the solidified blank while the extraction means produced by a mandrel with extendable head is not shown.
  • the assembly rests on a mobile table (0), which is provided with a system allowing vertical oscillation.
  • the installation may also include a measurement system, not shown, which is used for the continuous determination of the thickness of the wall of the hollow blank and which is connected in turn to a microprocessor.
  • the microprocessor receives from the system - measuring the thickness of the walls - signals which it uses to regulate the intensity of the primary cooling and secondary, the speed of rotation of the inductors, the speed of the drive of the extraction system, as well as the flow rate of fresh liquid metal that is added.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP81630059A 1980-10-20 1981-10-08 Procédé et installation pour la fabrication continue d'ébauches creuses en métal Withdrawn EP0050581A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU82874 1980-10-20
LU82874A LU82874A1 (fr) 1980-10-20 1980-10-20 Procede et installation pour la fabrication continue d'ebauches creuses en metal

Publications (1)

Publication Number Publication Date
EP0050581A1 true EP0050581A1 (fr) 1982-04-28

Family

ID=19729516

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81630059A Withdrawn EP0050581A1 (fr) 1980-10-20 1981-10-08 Procédé et installation pour la fabrication continue d'ébauches creuses en métal

Country Status (5)

Country Link
EP (1) EP0050581A1 (ja)
JP (1) JPS57127550A (ja)
AU (1) AU7657881A (ja)
LU (1) LU82874A1 (ja)
SU (1) SU1087056A3 (ja)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114988A1 (en) * 1982-12-30 1984-08-08 General Electric Company Continuous metal casting method
EP0166346A2 (en) * 1984-06-19 1986-01-02 General Electric Company Electromagnetic levitation casting apparatus having improved levitation coil assembly
EP0168693A1 (en) * 1984-07-02 1986-01-22 General Electric Company Continuous metal tube casting method, apparatus and product
GB2168633A (en) * 1984-12-07 1986-06-25 Pont A Mousson Making cast-iron pipe by upward continuous casting
EP0320729A1 (de) * 1987-12-15 1989-06-21 Centrem S.A. Verfahren und Vorrichtung zur kontinuierlichen Herstellung von Metallprodukten
US4865116A (en) * 1984-07-02 1989-09-12 General Electric Company Continuous metal tube casting method and apparatus
EP0674958A2 (de) * 1994-03-28 1995-10-04 Didier-Werke Ag Verfahren und Vorrichtung zum endabmessungsnahen Vergiessen von Schmelzen
CN103706773A (zh) * 2013-12-18 2014-04-09 陕西同心连铸管业科技有限公司 空心铸铁管材及其垂直连铸方法和专用设备
CN110681837A (zh) * 2019-10-11 2020-01-14 石家庄爱迪尔电气有限公司 一种电磁上引悬浮连续铸造装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2352612A1 (fr) * 1976-05-26 1977-12-23 Pont A Mousson Procede et installation pour la coulee continue par centrifugation de produits tubulaires en fonte notamment
FR2414969A1 (fr) * 1978-01-23 1979-08-17 Creusot Loire Procede de coulee continue de metaux, notamment d'acier, dispositif pour la mise en oeuvre et ebauche metallique creuse obtenue par ce procede
FR2419781A1 (fr) * 1978-03-17 1979-10-12 Perie Rene Machine de coulee continue pour tubes
FR2422460A1 (fr) * 1978-04-14 1979-11-09 Arbed Procede et installation pour la fabrication d'ebauches creuses

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2352612A1 (fr) * 1976-05-26 1977-12-23 Pont A Mousson Procede et installation pour la coulee continue par centrifugation de produits tubulaires en fonte notamment
FR2414969A1 (fr) * 1978-01-23 1979-08-17 Creusot Loire Procede de coulee continue de metaux, notamment d'acier, dispositif pour la mise en oeuvre et ebauche metallique creuse obtenue par ce procede
FR2419781A1 (fr) * 1978-03-17 1979-10-12 Perie Rene Machine de coulee continue pour tubes
FR2422460A1 (fr) * 1978-04-14 1979-11-09 Arbed Procede et installation pour la fabrication d'ebauches creuses

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114988A1 (en) * 1982-12-30 1984-08-08 General Electric Company Continuous metal casting method
EP0166346A2 (en) * 1984-06-19 1986-01-02 General Electric Company Electromagnetic levitation casting apparatus having improved levitation coil assembly
EP0166346A3 (en) * 1984-06-19 1986-08-20 General Electric Company Electromagnetic levitation casting apparatus having improved levitation coil assembly
EP0168693A1 (en) * 1984-07-02 1986-01-22 General Electric Company Continuous metal tube casting method, apparatus and product
US4865116A (en) * 1984-07-02 1989-09-12 General Electric Company Continuous metal tube casting method and apparatus
GB2168633A (en) * 1984-12-07 1986-06-25 Pont A Mousson Making cast-iron pipe by upward continuous casting
EP0320729A1 (de) * 1987-12-15 1989-06-21 Centrem S.A. Verfahren und Vorrichtung zur kontinuierlichen Herstellung von Metallprodukten
EP0674958A2 (de) * 1994-03-28 1995-10-04 Didier-Werke Ag Verfahren und Vorrichtung zum endabmessungsnahen Vergiessen von Schmelzen
EP0674958A3 (de) * 1994-03-28 1997-03-26 Didier Werke Ag Verfahren und Vorrichtung zum endabmessungsnahen Vergiessen von Schmelzen.
CN103706773A (zh) * 2013-12-18 2014-04-09 陕西同心连铸管业科技有限公司 空心铸铁管材及其垂直连铸方法和专用设备
WO2015089959A1 (zh) * 2013-12-18 2015-06-25 陕西同心连铸管业科技有限公司 空心铸铁管材及其垂直连铸方法和专用设备
CN110681837A (zh) * 2019-10-11 2020-01-14 石家庄爱迪尔电气有限公司 一种电磁上引悬浮连续铸造装置

Also Published As

Publication number Publication date
SU1087056A3 (ru) 1984-04-15
JPS57127550A (en) 1982-08-07
LU82874A1 (fr) 1982-05-10
AU7657881A (en) 1982-04-29

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

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Effective date: 19821028

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Inventor name: METZ, PAUL

Inventor name: KAELL, NORBERT