EP0320575B1 - Procédé de laisser ouvert le conduit pour l'orifice de busettes à tiroir en installations de coulée continue - Google Patents

Procédé de laisser ouvert le conduit pour l'orifice de busettes à tiroir en installations de coulée continue Download PDF

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Publication number
EP0320575B1
EP0320575B1 EP88114741A EP88114741A EP0320575B1 EP 0320575 B1 EP0320575 B1 EP 0320575B1 EP 88114741 A EP88114741 A EP 88114741A EP 88114741 A EP88114741 A EP 88114741A EP 0320575 B1 EP0320575 B1 EP 0320575B1
Authority
EP
European Patent Office
Prior art keywords
sliding plate
opening
opening movement
throttled position
flow passage
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 - Lifetime
Application number
EP88114741A
Other languages
German (de)
English (en)
Other versions
EP0320575A2 (fr
EP0320575A3 (en
Inventor
Walter Vetterli
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.)
Metacon AG
Original Assignee
Metacon 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 Metacon AG filed Critical Metacon AG
Priority to AT88114741T priority Critical patent/ATE89772T1/de
Publication of EP0320575A2 publication Critical patent/EP0320575A2/fr
Publication of EP0320575A3 publication Critical patent/EP0320575A3/de
Application granted granted Critical
Publication of EP0320575B1 publication Critical patent/EP0320575B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum 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
    • B22D11/16—Controlling or regulating processes or operations

Definitions

  • the invention relates to a method for keeping the flow channel of a slide closure in the controlled pouring of molten metal from an intermediate vessel via the slide closure, in particular in the mold, while maintaining a controlled target level of the molten metal of a continuous casting plant in the mold by means of the slide closure, which mainly acts in the throttle position, the flow channel with the help of an opening process is flushed away from deposits.
  • the object of the present invention is to eliminate constricting deposits in the flow channel of the slide closure, while avoiding the disadvantages mentioned, with simple measures which are carried out in the area of the desired fill level control and consistently high strand quality of molten metal, in particular molten steel.
  • DE-A-3 344 127 discloses a method and a device for filling a continuous casting mold when casting a strand with the aid of a stopper closure.
  • the metal melt discharge can only be regulated by changing the ratio of opening time to closing time. The faster the strand is pulled out of the mold, the longer the opening times are relative to the closing times of the stopper closure.
  • the opening setpoint i.e. to increase the opening time for a pouring sip if the monitoring of the bath level in the mold has shown that the amount of molten metal released per unit of time has decreased to an undesirable extent due to deposits. Such a mode of operation is not applicable to a slide closure.
  • the coordination of the speed of the opening stroke of the slide plate to the regulation of the nominal fill level is the function of two factors: on the one hand, the pouring impulse generated by a persistent, full opening of the slide plate should be able to wash out existing deposits, but on the other hand the amount of melt conveyed with the pulse should Do not raise the bath level in the mold above the control range of the target level.
  • the slide plate When carrying out the opening stroke, it proves particularly useful that the slide plate is placed from a throttle position into a throttle position opposite the flow channel of the slide closure.
  • a flow pressure which has an errosive effect on the deposits is formed, which further promotes the washing out of the flow channel.
  • uniform wear of the plate material at the throttle edges of the flow channel can be achieved, which increases the service life of the slide closure. With different wear patterns in the opposing throttle positions there are different positions of the slide plate with the same flow rate.
  • the procedure according to the invention is such that the slide plate is opened periodically, i.e. at predetermined regular time intervals, which are adapted to the lubricating behavior of the molten metal and, for example when casting conventional molten metal, can be between one and ten minutes depending on the mold cross section.
  • the opening stroke of the slide plate can take place when a predetermined maximum degree of opening is reached within the target level control.
  • the initiation of the opening stroke is solely linked to the degree of narrowing of the flow channel.
  • the throttle positions and / or movements of the slide plate are superimposed by an oscillating movement of the slide plate. This further facilitates the clearing of the flow channel of the slide closure.
  • flushing gas can be introduced into the spout and / or the pouring tube at least during the opening stroke, which supports the flow impulse in the melt flow brought about by the opening stroke, particularly with regard to washing out deposits in the pouring spout and pouring tube.
  • an intermediate vessel 1 containing molten metal has a slide closure 3 in the throttle position on the spout 2. This regulates the flow rate of the flow channel 7 formed by the intermediate vessel 1 through the common flow channel 7 formed by the flow openings of a stationary top plate 4, an adjustable slide plate 5 and a stationary bottom plate 6, and through the pouring tube 8 to the mold 9.
  • the slide plate 5 is mechanically coupled to an actuator 10, the respective operating position of which is identified by a position meter 11.
  • the molten metal in the mold 9, into which the pouring tube 8 projects with the free end, has a nominal fill level 12 set for normal operation, which is controlled by a transmitter 13, for example, as a radiator and a receiver 14, for example, as a radiation detector.
  • the withdrawal of the strand 15 solidified on the outside in the mold 9 takes place by means of a take-off drive having drive rollers 16 17, to which a trigger controller 18 and a trigger speed meter 19 coupled with this control system are assigned.
  • the latter additionally transmits its data to a processor 20, which also receives and processes the data from the position meter 11 and the receiver 14. Resulting control commands are sent by a controller 21 integrated in the processor 20 to the actuator 10 of the slide closure 3 and to the trigger controller 18.
  • the withdrawal speed of the strand is defined as a constant, which means that the desired fill level 12 in the mold 9 is regulated solely from the inflow side by means of the slide closure 3.
  • the slide plate 5 assumes a throttle position which, by opening and closing, allows more or less melt to be supplied in order to maintain the balance between the amount of melt flowing in per unit time and the strand 15 emerging from the mold 9.
  • the melt flow is, as can be seen in particular from FIG. 1, redirected twice when the slide closure 3 is throttled, namely on the inlet and outlet sides of the slide plate 5.
  • deposits of oxides and / or sulfides preferably occur at said locations.
  • the slide plate 5 moves on with erosion wear and the cross section of the flow channel 7 becomes larger, on the other hand it continues to open as soon as the cross section is narrowed by deposits 22.
  • the processor 20 initiates a process sequence which is automatic Adjustment of the slide plate 5 from the throttle position shown in FIG. 2 with deposits 22 into a new, opposite throttle position (FIG. 3), in which the regulation of the desired fill level 12 continues.
  • the so adjusted slide plate 5 passes with its flow opening the full opening position, in which the flow openings of all three plates 4 to 6 are coaxial, so that the fully effective pouring stream the three hanging in the flow channel 7 deposits 22 during the retraction in the new throttle position mirror-image changing deflection of the pouring jet washed away or washed away (Fig. 4).
  • the opening stroke of the slide plate 5 into the new throttle position according to FIG. 3, which is carried out in one go without stopping, takes place at a speed which ensures that the short-term increased melt supply into the mold 9 can be easily compensated for by the desired fill level control.
  • the actuator 10 and its position meter 11 are designed for both throttle positions. Nevertheless, there is also the possibility of coping with an opening stroke with throttle operation that only functions on one side, by opening the slide plate 5 without stopping and immediately returning it to an initially assumed throttle position.
  • the opening stroke can be repeated at regular intervals in order to prevent the flow channel 7 from becoming smeared, or it comes into play when the position meter 11 reports a fixed maximum degree of opening of the slide closure 3, i.e. considerable deposits 22 are already present in the flow channel 7.
  • the invention applies to both two and three-plate gate valves on rotary, swivel or linear systems. Furthermore, the invention also applies to continuous casting plants with a combined inflow and discharge control and for slide closures which are arranged on pans with which the intermediate vessel is filled in dependence on the bath level in the vessel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)

Claims (6)

  1. Procédé pour maintenir dégagé le conduit d'écoulement (7) d'un obturateur à tiroir lors de la coulée régulée de métal liquide, à travers ledit obturateur à tiroir (3), d'un répartiteur (1) vers une lingotière (9), un niveau (12) de consigne du métal liquide dans la lingotière d'une installation de coulée continue étant maintenu au moyen de l'obturateur à tiroir (3) qui agit essentiellement en position d'étranglement et dont le conduit d'écoulement (7) est libéré des dépôts au cours d'une phase d'ouverture, caractérisé par le fait que, par une course d'ouverture ne comportant pas de temps mort, on amène la plaque d'obturateur (5) d'une position d'étranglement vers une position d'étranglement adaptée au conduit d'écoulement dégagé en passant par la pleine ouverture, avec une vitesse adaptée à la régulation du niveau de consigne (12) et tenant compte de l'apport supplémentaire de métal liquide.
  2. Procédé selon la revendication 1, caractérisé par le fait que, par la course d'ouverture, on amène la plaque d'obturateur (5) d'une position d'étranglement dans une position d'étranglement opposée par rapport au conduit d'écoulement (7) de l'obturateur à tiroir (3).
  3. Procédé selon la revendication 1 ou 2, caractérisé par le fait que la course d'ouverture de la plaque d'obturateur (5) est périodique.
  4. Procédé selon la revendication 1 ou 2, caractérisé par le fait que la course d'ouverture est déclenchée dès qu'un taux d'étranglement maximal de la plaque d'obturateur (5) fixé pour la position d'étranglement est atteint.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé par le fait que l'on superpose un mouvement d'oscillation de la plaque d'obturateur (5) à la position et/ou aux déplacements d'étranglement de ladite plaque d'obturateur (5) un mouvement d'oscillation, au moins préalablement à la course d'ouverture concernée.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé par le fait que l'on introduit un gaz de balayage dans la busette de coulée (2) et/ou le tube de coulée (8), au moins pendant la course d'ouverture de la plaque d'obturateur (5).
EP88114741A 1987-12-12 1988-09-09 Procédé de laisser ouvert le conduit pour l'orifice de busettes à tiroir en installations de coulée continue Expired - Lifetime EP0320575B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88114741T ATE89772T1 (de) 1987-12-12 1988-09-09 Verfahren zum freihalten des durchflusskanals von schiebeverschluessen an stranggiessanlagen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3742215 1987-12-12
DE19873742215 DE3742215A1 (de) 1987-12-12 1987-12-12 Verfahren zum freihalten des durchflusskanals von schiebeverschluessen an stranggiessanlagen

Publications (3)

Publication Number Publication Date
EP0320575A2 EP0320575A2 (fr) 1989-06-21
EP0320575A3 EP0320575A3 (en) 1990-06-13
EP0320575B1 true EP0320575B1 (fr) 1993-05-26

Family

ID=6342488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114741A Expired - Lifetime EP0320575B1 (fr) 1987-12-12 1988-09-09 Procédé de laisser ouvert le conduit pour l'orifice de busettes à tiroir en installations de coulée continue

Country Status (18)

Country Link
US (1) US4890665A (fr)
EP (1) EP0320575B1 (fr)
JP (1) JP2756683B2 (fr)
KR (1) KR960013885B1 (fr)
CN (1) CN1013081B (fr)
AR (1) AR240268A1 (fr)
AT (1) ATE89772T1 (fr)
BR (1) BR8806518A (fr)
CA (1) CA1322448C (fr)
CZ (1) CZ284252B6 (fr)
DE (2) DE3742215A1 (fr)
ES (1) ES2042668T3 (fr)
FI (1) FI85958C (fr)
MX (1) MX170737B (fr)
PL (1) PL163968B1 (fr)
RU (1) RU2038887C1 (fr)
SK (1) SK281170B6 (fr)
ZA (1) ZA888711B (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3869957D1 (de) * 1988-08-31 1992-05-14 Metacon Ag Verfahren zum steuern von schieberverschluessen, insbesondere an stranggiessanlagen.
WO1995017872A1 (fr) * 1993-12-28 1995-07-06 Daito Electric Machine Industry Company Limited Appareil de massage a vibrations
GB9501263D0 (en) * 1995-01-23 1995-03-15 Snowden Pte Ltd A door assembly
GB2311947A (en) * 1996-03-12 1997-10-15 Flogates Ltd Sliding gate valve
DE19807114B4 (de) * 1998-02-20 2006-11-23 Sms Demag Ag Verfahren zur Qualitätsüberwachung des Gießvorganges einer Stranggießanlage
JP2005508756A (ja) * 2001-11-13 2005-04-07 ベスビウス クルーシブル カンパニー 直線スライドゲート用の複数穴・複数エッジ形制御プレート
US9964498B2 (en) * 2015-09-11 2018-05-08 Baylor University Electromagnetic steam energy/quality, flow, and fluid property sensor and method
DK3276095T3 (da) * 2016-07-26 2020-06-02 Viega Tech Gmbh & Co Kg Indretning til drosling af skyllestrømmen fra en sanitær skyllecisterne, afløbsventil og sanitær skyllecisterne med en sådan indretning

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49139325U (fr) * 1973-04-02 1974-11-30
DE2926863C2 (de) * 1979-07-03 1983-10-27 Zimmermann & Jansen GmbH, 5160 Düren Verfahren zur Steuerung des Ausgußschiebers eines Gießgefäßes
CH653269A5 (de) * 1981-06-01 1985-12-31 Metacon Ag Verfahren zum verhindern des einfrierens von metallischen schmelzen im auslaufkanal eines giessgefaesses.
DE3344127A1 (de) * 1982-06-09 1985-06-20 Brown, Boveri & Cie Ag, 6800 Mannheim Verfahren und vorrichtung zum fuellen einer stranggiesskokille beim angiessen eines stranges
JPS603952A (ja) * 1983-06-20 1985-01-10 Sumitomo Metal Ind Ltd 溶融金属の注入方法
DE3422901C2 (de) * 1984-06-20 1987-02-05 Metacon AG, Zürich Verfahren zum Vergießen einer metallischen Schmelze
US4730660A (en) * 1984-09-05 1988-03-15 Metacon Aktiengesellschaft Process for casting molten metal into several strands
JPS61212460A (ja) * 1985-03-19 1986-09-20 Sumitomo Metal Ind Ltd 連続鋳造設備の溶鋼注流路詰り防止装置
DE3509932A1 (de) * 1985-03-19 1986-10-02 Metacon AG, Zürich Verfahren zum anfahren einer stranggiessanlage
JPS61169156U (fr) * 1985-04-03 1986-10-20
DE3608503C2 (de) * 1986-03-14 1994-09-01 Stopinc Ag Verfahren zum automatischen Angießen eines Stranges einer Stranggießanlage

Also Published As

Publication number Publication date
CN1013081B (zh) 1991-07-10
DE3742215C2 (fr) 1991-07-04
ZA888711B (en) 1990-05-30
JP2756683B2 (ja) 1998-05-25
KR960013885B1 (ko) 1996-10-10
DE3742215A1 (de) 1989-06-22
MX170737B (es) 1993-09-10
CA1322448C (fr) 1993-09-28
SK281170B6 (sk) 2000-12-11
KR890009503A (ko) 1989-08-02
CN1034156A (zh) 1989-07-26
EP0320575A2 (fr) 1989-06-21
FI85958C (fi) 1992-06-25
US4890665A (en) 1990-01-02
ES2042668T3 (es) 1993-12-16
CZ284252B6 (cs) 1998-10-14
FI885707A (fi) 1989-06-13
JPH026041A (ja) 1990-01-10
CS770088A3 (en) 1992-12-16
AR240268A1 (es) 1990-03-30
FI885707A0 (fi) 1988-12-09
PL276316A1 (en) 1989-08-21
EP0320575A3 (en) 1990-06-13
PL163968B1 (pl) 1994-06-30
FI85958B (fi) 1992-03-13
RU2038887C1 (ru) 1995-07-09
DE3881356D1 (de) 1993-07-01
BR8806518A (pt) 1989-08-22
ATE89772T1 (de) 1993-06-15

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