EP0019114B1 - Procédé et dispositif pour la coulée continue de plusieurs barres - Google Patents

Procédé et dispositif pour la coulée continue de plusieurs barres Download PDF

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Publication number
EP0019114B1
EP0019114B1 EP80102205A EP80102205A EP0019114B1 EP 0019114 B1 EP0019114 B1 EP 0019114B1 EP 80102205 A EP80102205 A EP 80102205A EP 80102205 A EP80102205 A EP 80102205A EP 0019114 B1 EP0019114 B1 EP 0019114B1
Authority
EP
European Patent Office
Prior art keywords
mould
bath level
moulds
strands
speed
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
EP80102205A
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German (de)
English (en)
Other versions
EP0019114A1 (fr
Inventor
Markus Schmid
Hans Gloor
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.)
SMS Concast AG
Original Assignee
Concast Holding AG
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 Concast Holding AG filed Critical Concast Holding AG
Priority to AT80102205T priority Critical patent/ATE2877T1/de
Publication of EP0019114A1 publication Critical patent/EP0019114A1/fr
Application granted granted Critical
Publication of EP0019114B1 publication Critical patent/EP0019114B1/fr
Expired legal-status Critical Current

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    • 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
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • B22D11/201—Controlling or regulating processes or operations for removing cast stock responsive to molten metal level or slag level
    • B22D11/204—Controlling or regulating processes or operations for removing cast stock responsive to molten metal level or slag level by using optical means
    • 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
    • B22D11/147—Multi-strand plants

Definitions

  • the invention relates to a process for the continuous casting of several strands, steel being poured into molds from at least one intermediate vessel, the strands being formed being pulled out of the molds at the same speed, cooled and the bath levels in the molds being kept at the desired heights, and a device for Execution of the procedure.
  • a separate drive unit is usually assigned to each strand, so that they can be driven at an individual strand pull-out speed.
  • drive units with hollow drive rollers have become known (DE-A 2 702 894), through which drive shafts for adjacent strands are guided.
  • Such drive units allow a pull-out speed that is adapted to each strand, but are structurally complicated and very expensive.
  • the invention has for its object to provide a method for the simultaneous casting of several strands with a small strand spacing, in which the cast strands are pulled out by a common drive unit at the same speed and which works more simply and reliably. Furthermore, the method should be applicable for small strand formats and be automatable by simple means. The operating costs for the control devices and their maintenance as well as the personnel costs for the casting operation should also be minimal.
  • this object is achieved in that the pull-out speed is controlled as a function of the reference inflow quantity regulated per unit of time and flows into a first mold, and the inflow quantity in at least one further mold is regulated by means of an inflow control device controlled by a bath level measuring device as a function of this pull-out speed.
  • This methodology results in a new control concept for the casting of multiple strands with a small strand spacing according to the preamble, wherein the bath level height of a first strand is achieved via the strand pull-out speed and at least one further strand via a control device on the pouring nozzle.
  • An inflow control into the mold of the first strand is not necessary. This results in a reduced operational expenditure for equipment and maintenance of regulating organs and the personnel expenditure for the foundry operation.
  • the device according to the invention is characterized in that the bath level measuring device of the first mold, which has an uncontrolled melt inflow, is electrically connected to a regulating device for the speed of the common pull-out unit, and that the bath level measuring device of the further molds is electrically connected to regulating devices for the inflow amount.
  • the reference inflow quantity flowing into the first mold is essentially determined by the shape and dimension of a closure-free pouring nozzle opening.
  • a certain change in the reference supply quantity can be achieved by selecting the bath level in the intermediate vessel.
  • Such an arrangement allows a substantial reduction in closure and Re organized.
  • the pouring nozzle can be closed using a copper stopper by freezing.
  • the pouring jet forming in the pouring nozzle of the intermediate vessel can advantageously be acted upon by constricting electromagnetic fields.
  • a control device for the inflow quantity consists of electromagnetic coils constricting the pouring jet.
  • the pouring jet forming in the pouring nozzle of the tundish for the further molds can be regulated by inflowing gases.
  • the corresponding inflow quantity control consists of a gas supply device opening into the pouring nozzle and an associated regulation.
  • the two control methods mentioned work without mechanical force devices, such as hydraulic cylinders, and without refractory parts, such as plugs or slide plates. This reduces maintenance and extends the casting time per sequence cast due to the lack of wear on such refractory parts. Furthermore, a control that is simpler than the known plug or slide controls can be selected for the control of the magnetic force field or for the gas quantity.
  • the first and the further mold can advantageously be arranged in a common frame and this frame can be connected to an oscillation device.
  • the molds are oscillated in synchronism.
  • FIG. 1 an intermediate vessel 1 with two pouring nozzles 2, 2 'is arranged above two molds 3, 3' fastened in a mold frame 4.
  • Each mold is provided with a bath level measuring device 6, 6 ', which are shown in this example as optical measuring devices. Of course, any other bath level measuring device can also be used instead of the optical one.
  • Downstream of the molds is a secondary cooling zone 8 and then a common pull-out unit 10 for the two strands 9, 9 '.
  • the bath level measuring device 6 of the first mold 3 is electrically connected to a controller 11 for the pull-out speed of the pull-out unit 10. If the metal flow from the pouring nozzle 2 is too large, the control 11 automatically increases the pull-out speed for the two strands 9, 9 'and vice versa.
  • the bath level measuring device 6 'of the second mold 3' or further molds arranged in the mold frame 4 is electrically connected to a control device for the inflow quantity from the pouring nozzle 2 '.
  • This control device consists of a control 13 and a coil 15 which acts on the casting stream which is formed for the mold 3 'by means of a constricting electromagnetic field. This constricting effect regulates the amount of metal flowing through.
  • the method according to the invention presupposes that the two strands 9, 9 'at the same speed, i. H. from a single pull-out unit 10, are pulled out of the mold.
  • the pull-out speed is controlled as a function of the reference inflow quantity flowing into the first mold 3 per unit of time, and the inflow quantity in the further mold 3 'is regulated depending on the pull-out speed via the' bath level measuring device 6 ', the controller 13 and the electromagnetic coil 15.
  • the reference inflow quantity flowing into the first mold 3 is essentially only determined by the shape and dimensions of the non-closure pouring nozzle 2. Instead of another mold 3 ', additional molds can be present.
  • the flow cross section of the pouring nozzle 2 for the reference inflow quantity into the first mold 3 is advantageously chosen to be approximately 10% smaller than the flow cross section of the pouring nozzle 2 'for the further mold 3'.
  • the bath level measuring devices in the molds can measure a very large height range and devices are provided which measure and compare the rate of rise of the bath level in the two molds 3, 3 'during casting can. With such a comparison signal, it is possible to determine different inflow quantities at an early stage and to control the electromagnetic coil 15 before the target bath level is reached, to enable smooth start-up even with small formats.
  • a throttle device in the form of an electromagnetic coil 21 is assigned to a pouring nozzle 2 of an intermediate vessel.
  • the coil 21 generates a force field with an effective direction 22 against the pouring jet.
  • the force field and thus the outflow quantity from the nozzle 2 change.
  • the throttling with the coil 21 is only effective in a certain range from the maximum flow rate.
  • a copper plug can be used to close the nozzle.
  • a pouring nozzle 31 is equipped with a throttle device in the form of a gas supply 32 and a controller 33 for the amount of gas.
  • the controller 33 is in turn connected to the corresponding bath level measuring device.
  • the injected inert gas is intended to disrupt the inflow flow in the inlet funnel in order to throttle the inflow amount.
  • throttle devices instead of the throttle devices described, other throttle devices can also be used.
  • the oscillation movement of the mold can be replaced, for example, by applying a vibration movement or ultrasonic waves.

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

Claims (9)

1. Procédé pour la coulée continue de plusieurs lignes, dans lequel l'acier est coulé, à partir d'au moins un récipient intermédiaire (1), dans des lingotières (3, 3'), les barres (9, 9') qui se forment sont extraites à la même vitesse hors des lingotières (3, 3'), refroidies, et le niveau du bain de fusion dans les lingotières (3, 3') est maintenu aux niveaux désirés, caractérisé en ce que la vitesse d'extraction est pilotée en fonction du débit d'arrivée de référence, non régulé, qui coule dans la première lingotière (3) par unité de temps ; et en ce que le débit d'arrivée dans au moins une autre lingotière (3') est régulé, en fonction de la vitesse d'extraction commune, au moyen d'un dispositif de régulation du débit d'arrivée (13) piloté par un dispositif de mesure du niveau de bain de fusion (6').
2. Procédé selon la revendication 1, caractérisé en ce que le jet de fusion qui se forme dans la busette de sortie de coulée (2') du récipient intermédiaire (1), pour l'autre lingotière (3'), est influencé par des champs électromagnétiques donnant un effet de pincement.
3. Procédé selon la revendication 1, caractérisé en ce que le jet de fusion qui se forme dans la busette de sortie de coulée (2') du récipient intermédiaire (1), pour l'autre lingotière (3'), est régulé par une admission de gaz.
4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que l'on fait osciller en synchronisme la première lingotière (3) et l'autre lingotière (3').
5. Dispositif pour l'exécution du procédé selon l'une des revendications 1 à 4, où est disposé au moins un récipient intermédiaire (1) comportant au moins deux busettes de sortie de coulée (2, 2') au-dessus d'au moins deux lingotières (3, 3') munies de dispositifs de mesure du niveau du bain de fusion (6, 6') et où un dispositif de refroidissement secondaire (8) ainsi qu'un mécanisme d'extraction (10) sont disposés en aval des lingotières (3, 3'), caractérisé en ce que le dispositif de mesure du niveau du bain de fusion (6) de la première lingotière (3), dont le débit d'arrivée du bain de fusion n'est pas régulé, et relié électriquement à un dispositif de commande (11) pour la vitesse du mécanisme commun d'extraction (10) ; et en ce que le dispositif de mesure du niveau de bain de fusion (6') de l'autre lingotière (3') est relié électriquement à des dispositifs de régulation du débit d'arrivée du bain.
6. Dispositif selon la revendication 5, caractérisé en ce que les dispositifs de régulation du débit d'arrivée du bain sont constitués en bobines électromagnétiques (15, 21) qui entourent le jet de fusion.
7. Dispositif selon la revendication 5, caractérisé en ce que les dispositifs de régulation du débit d'arrivée de coulée sont constitués d'un dispositif d'arrivée du gaz (32) qui débouche dans la busette de sortie de coulée et d'un dispositif de commande (33) du débit du gaz.
8. Dispositif selon l'une des revendications 5 à 7, caractérisé en ce que la section de passage de la busette de sortie de coulée (2) pour le débit d'arrivée de référence dans la première lingotière (3) est d'environ 10 % inférieure aux sections de passage des busettes de sortie (2', 31) de l'autre lingotière (3').
9. Dispositif selon l'une des revendications 5 à 8, caractérisé en ce que la première lingotière (3) et l'autre lingotière (3') sont disposées dans un châssis commun (4) ; et en ce que ce châssis (4) est relié à un dispositif d'oscillation (17).
EP80102205A 1979-04-27 1980-04-24 Procédé et dispositif pour la coulée continue de plusieurs barres Expired EP0019114B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80102205T ATE2877T1 (de) 1979-04-27 1980-04-24 Verfahren und vorrichtung zum stranggiessen von mehreren straengen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH397579A CH639575A5 (de) 1979-04-27 1979-04-27 Verfahren und vorrichtung zum stranggiessen von mehreren straengen.
CH3975/79 1979-04-27

Publications (2)

Publication Number Publication Date
EP0019114A1 EP0019114A1 (fr) 1980-11-26
EP0019114B1 true EP0019114B1 (fr) 1983-03-30

Family

ID=4267455

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80102205A Expired EP0019114B1 (fr) 1979-04-27 1980-04-24 Procédé et dispositif pour la coulée continue de plusieurs barres

Country Status (7)

Country Link
US (1) US4349066A (fr)
EP (1) EP0019114B1 (fr)
JP (1) JPS55144364A (fr)
AT (1) ATE2877T1 (fr)
CA (1) CA1151390A (fr)
CH (1) CH639575A5 (fr)
DE (1) DE3062505D1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4567935A (en) * 1981-05-26 1986-02-04 Kaiser Aluminum & Chemical Corporation Molten metal level control in continuous casting
US4498521A (en) * 1981-05-26 1985-02-12 Kaiser Aluminum & Chemical Corporation Molten metal level control in continuous casting
CH659783A5 (de) * 1983-03-29 1987-02-27 Metacon Ag Verfahren und vorrichtung zum steuern einer stranggiessanlage.
DE3317474A1 (de) * 1983-05-13 1984-11-15 Russ-Elektroofen Produktions-Gesellschaft mbH & Co KG, 5000 Köln Niederdruckgiessverfahren und vorrichtung zu seiner durchfuehrung
EP0149447A3 (fr) * 1983-12-29 1986-10-22 VOEST-ALPINE Aktiengesellschaft Procédé pour la régulation du niveau dans les lingotières de coulée continue d'une installation de coulée continue multiple et dispositif pour la mise en oeuvre de ce procédé
DE3432611C2 (de) * 1984-09-05 1986-09-04 Metacon AG, Zürich Verfahren zum Anfahren einer Stranggießanlage mit mehreren Strängen
DE3538222A1 (de) * 1985-10-26 1987-05-27 Metacon Ag Verfahren zum anfahren einer stranggiessanlage mit mehreren straengen
WO1988000867A1 (fr) * 1986-08-08 1988-02-11 Kurzinski Cass R Machine a couler en grappe et procede d'utilisation de ladite machine
SE460103B (sv) * 1987-03-26 1989-09-11 Asea Ab Anordning foer styrning av gjutfoerlopp
CN107282906A (zh) * 2016-04-01 2017-10-24 南京梅山冶金发展有限公司 确定连铸混浇过程的混浇率和时间的实验方法
CN109789477B (zh) * 2016-09-27 2021-10-26 海德鲁铝业钢材有限公司 用于多重浇铸金属股线的方法
US20190210099A1 (en) * 2017-10-05 2019-07-11 Emirates Steel Industries PJSC Method for continuous casting of two or more long products using a single continuous casting strand
CN112296295B (zh) * 2020-09-11 2021-09-14 柳州钢铁股份有限公司 双流板坯连铸机在浇注中停流后再次开流的方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1254828B (de) * 1962-05-29 1967-11-23 Concast Ag Plattenkokille zum Stranggiessen
DE2702894A1 (de) * 1976-01-27 1977-07-28 Ishikawajima Harima Heavy Ind Treibrollengeruest fuer eine mehrstraengige stranggussanlage

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US2743492A (en) * 1953-04-20 1956-05-01 Allegheny Ludlum Steel Apparatus for controlling the flow of molten metal
US2772455A (en) * 1955-10-28 1956-12-04 Allegheny Ludlum Steel Metal pouring apparatus for continuous casting
US2948030A (en) * 1957-03-13 1960-08-09 Koppers Co Inc Method and apparatus for the continuous casting of molten metal
US3292216A (en) * 1963-06-25 1966-12-20 Concast Ag Adjustable mold for continuous casting installation
GB1067545A (en) * 1964-09-08 1967-05-03 United Steel Companies Ltd Machines for continuously casting metal
US3358743A (en) * 1964-10-08 1967-12-19 Bunker Ramo Continuous casting system
US3537505A (en) * 1965-12-30 1970-11-03 Concast Ag Method of controlling continuous casting
US3521696A (en) * 1967-04-19 1970-07-28 Brun Sensor Systems Inc Continuous casting line speed control
DE1921808A1 (de) * 1969-04-29 1970-11-12 Schloemann Ag Verfahren und Vorrichtung zur Regelung des Zuflusses der Metallschmelze zu Stranggiesskokillen
DE2039019B2 (de) * 1970-08-05 1975-11-13 Gosudarstwenny Nautschno-Issledowatelskij I Projektnyj Institut Splawow I Obrabotki Zwetnych Metallow Giprozwetmetobrabotka, Moskau Verfahren und Einrichtung zur automatischen Regelung der Metallspiegelhöhe in der Kokille einer StranggieBanlage
US3861456A (en) * 1971-08-24 1975-01-21 United States Steel Corp Mechanism for controlling forces on a strand as it solidifies
US3817311A (en) * 1972-10-13 1974-06-18 Ibm Method and apparatus for controlling a continuous casting machine
DE2351816B2 (de) * 1972-10-17 1977-03-03 Concast AG, Zürich (Schweiz); Schloemann-Siemag AG, 4000 Düsseldorf Verfahren und einrichtung zum regeln der fuellstandshoehe von schmelze in kokillen von stranggiessanlagen
DD120753A3 (fr) * 1974-05-07 1976-07-05
DE2542290A1 (de) * 1974-09-26 1976-04-08 Centre Rech Metallurgique Verfahren zum steuern des stranggiessens von metallen
JPS5433827A (en) * 1977-08-22 1979-03-12 Mitsubishi Heavy Ind Ltd Method of controlling molten metal level within mode in continuous casting machine
JPS5477229A (en) * 1977-11-22 1979-06-20 Ishikawajima Harima Heavy Ind Method and apparatus for controlling drawing speed and mold level in continuous casting machine
BE869037A (fr) * 1978-07-14 1978-11-03 Centre Rech Metallurgique Procede de controle du niveau du metal dans la lingotiere de coulee continue des metaux

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1254828B (de) * 1962-05-29 1967-11-23 Concast Ag Plattenkokille zum Stranggiessen
DE2702894A1 (de) * 1976-01-27 1977-07-28 Ishikawajima Harima Heavy Ind Treibrollengeruest fuer eine mehrstraengige stranggussanlage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Schweizerische Bauzeitung, Sept, 1971, Heft 39 S. 977 *

Also Published As

Publication number Publication date
EP0019114A1 (fr) 1980-11-26
US4349066A (en) 1982-09-14
DE3062505D1 (en) 1983-05-05
CH639575A5 (de) 1983-11-30
JPS55144364A (en) 1980-11-11
CA1151390A (fr) 1983-08-09
ATE2877T1 (de) 1983-04-15

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