EP0066118B1 - Verfahren zum Verhindern des Einfrierens von metallischen Schmelzen im Auslaufkanal eines Giessgefässes und Giesseinrichtung für metallische Schmelzen zur Durchführung des Verfahrens - Google Patents

Verfahren zum Verhindern des Einfrierens von metallischen Schmelzen im Auslaufkanal eines Giessgefässes und Giesseinrichtung für metallische Schmelzen zur Durchführung des Verfahrens Download PDF

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Publication number
EP0066118B1
EP0066118B1 EP82104015A EP82104015A EP0066118B1 EP 0066118 B1 EP0066118 B1 EP 0066118B1 EP 82104015 A EP82104015 A EP 82104015A EP 82104015 A EP82104015 A EP 82104015A EP 0066118 B1 EP0066118 B1 EP 0066118B1
Authority
EP
European Patent Office
Prior art keywords
casting
movable slide
oscillator
slide member
outlet channel
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
EP82104015A
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German (de)
English (en)
French (fr)
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EP0066118A1 (de
Inventor
Bernhard Tinnes
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
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Filing date
Publication date
Application filed by Metacon AG filed Critical Metacon AG
Priority to AT82104015T priority Critical patent/ATE11018T1/de
Publication of EP0066118A1 publication Critical patent/EP0066118A1/de
Application granted granted Critical
Publication of EP0066118B1 publication Critical patent/EP0066118B1/de
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
    • 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
    • B22D41/14—Closures
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/38—Means for operating the sliding gate

Definitions

  • the invention relates to a method for preventing the freezing of metallic melts in the outlet channel of a casting vessel according to the preamble of claim 1.
  • the outlet channel is filled either with a non-metallic filler or with a metal with a low melting point when the vessel is empty.
  • the aim is to circulate the melt located in the outlet channel in order to mix colder melt with warmer melt and thereby prevent or delay its solidification.
  • the blowing in of air or other non-inert gases and nitrogen is generally forbidden for metallurgical reasons and therefore more expensive, inert gas must be used. Gas blowing not only results in increased operating costs, but the melt is also cooled by the cold gas entering. There is also the risk that due to active heat removal by the gas flow, both from the melt located in the outlet channel and from the refractory material delimiting this outlet channel with insufficient supply of heat from the casting vessel, e.g. B. sudden freezing occurs as a result of insufficient circulation.
  • the object of the invention is to provide a method according to the preamble of claim 1, with which the freezing of the outlet channel, both before the start and during operational interruptions in the casting process can be avoided reliably and without significant increase in operating costs.
  • the object is achieved with the measure according to the characterizing part of claim 1.
  • the solution according to the invention is therefore not intended to bring about an exchange of colder for warmer melt in the outlet channel by circulating it. Rather, this solution is based on the knowledge that the solidification of a melt layer resting on a flat surface can be delayed if the boundary surface is subjected to a back and forth movement in the plane.
  • the invention prevents the formation of a coherent solidification front in the melt layers close to the wall immediately above the movable slide part in the pouring channel. This is done in that shear loads are introduced into the melt parallel to the main solidification front by means of the oscillating movement of the movable slide part. Forces apparently also transfer into the zones of the outlet channel near the wall, which are at a certain distance from the movable slide part. In any case, the solution according to the invention succeeds in stopping the freezing even at temperatures which are only slightly above the liquidus temperature.
  • the invention also relates to a pouring device for carrying out the specified method with an outlet channel for a casting vessel, which ends in a slide closure, the movable slide part of which can be moved transversely to the outlet channel into and out of a closed position blocking the outlet channel and with an actuating device for the movable slide part, which is characterized by the features of the characterizing part of claim 3. Further refinements of the method according to the invention and the casting device according to the invention are contained in the subclaims.
  • the oscillation drive is also provided for positions other than the closed position of the movable slide part.
  • the oscillation drive can also be provided for the fully open position or, in the case of a control slide, also for intermediate positions between the open and the closed position. If the oscillation drive is superimposed on the actuator either directly or in relation to the corresponding signals, the oscillation drive can be in continuous operation.
  • the casting device comprises a program control for periodically opening and closing movements of the movable slide part.
  • the program control determines the frequency, the size of the movement and the dwell time in the respective open position.
  • the program control is preferably designed to be adjustable with respect to the aforementioned variables.
  • the program control can form part of a regulating device, the program control being able to be operated either only in the closed position or at most also in a partially open position of the movable slide part.
  • Carrying out the on-off movements from a throttled slide position is advantageous if, for. B. cast aluminum-soaked steel. In this case it is advisable to select the stroke so that the movable slide plate reaches the fully open position at the end of the open movement. This straightens the flow path of the melt through the slide.
  • the oxide deposits, which in the throttled state have preferably formed in the current-free zones, are washed out. Since the slide closure only has to remain in the open position for a short time in order to remove the deposits to which the amount of melt flowing during this time is compensated by influencing the flow conditions before or after the open / close movement.
  • the casting device according to the invention allows the outlet channel to be prevented from being clogged by the oxide deposits which cannot be avoided in the case of aluminum-calmed steel.
  • 2 generally designates a schematically illustrated casting vessel (distributor) which has a perforated brick 6 inserted in its base 4.
  • the perforated brick 6 delimits an upper part of an outlet channel 8, which continues downward in the base plate 12 of a conventional slide closure, generally designated 10.
  • the slide closure 10, which is also shown only schematically, comprises a plate-shaped, movable slide part 14 and a plate-shaped pouring part 16 rigidly connected to the base plate 12.
  • the pouring part 16 has a pouring opening 18 aligned with the outlet channel 8, while the slide part 14 has a passage Owns 20.
  • the between the base plate 12 and the pouring part 16 sealingly clamped, but displaceable transversely to the outlet channel 8, is by means of a generally designated 22 actuating device between an open position, in which the passage 20 is aligned with the outlet channel 8, and the closed, in the drawing (Fig. 1 and 2) shown movable position, in which the latter the connection between the outlet channel 8 and the pouring opening 18 is interrupted.
  • the actuating device 22 comprises a cylinder-piston unit 24 which is operatively connected to the slide part 14 and which is connected to a servo control block 26 via corresponding lines for a liquid medium.
  • the servo control block 26 controls the cylinder-piston unit 24 in a known manner and is connected to a pump 28 and a liquid tank 30 as shown.
  • a schematically illustrated control device 32 acts on the servo control block 26, which can either be operated by hand or switched on in a control circuit (not shown).
  • the control device 32 allows the servo control block 26 to be actuated to generate the actuating movements of the slide part 14.
  • an oscillator 34 is provided according to the exemplary embodiment shown in FIG. 1, which is connected to a vibrator 36 and causes it to generate oscillating movements of predetermined frequency and amplitude.
  • the vibrator 36 is connected between parts 38 and 40 of a piston rod which connects the cylinder-piston unit 24 to the movable slide part 14.
  • an arm 42 is rigidly attached to part 38 of the piston rod, which in the closed position is provided with a position transmitter 44, e.g. B. interacts in the form of a proximity switch (reedswitch).
  • the position transmitter 44 connected to the oscillator 34 switches the former on before the movable slide part 14 has reached the closed position, e.g. B. as long as there is a slight overlap between the outlet channel 8, the passage 20 and the pouring opening 18.
  • the vibrator 36 is thus also switched on before the movable slide part has reached the closed position.
  • the vibrator 36 only comes to rest when the movable slide part has left the closed position.
  • a manually operable switching element 46 which is connected to the oscillator 34, the oscillating drive of the movable slide part 14 can be switched on and off in other open positions of the latter.
  • the oscillator 34 can be adjustable in order to change the extent (stroke) and / or the time course of the oscillation movement on the movable slide part 14.
  • strokes of the order of a few millimeters, e.g. B. 3 mm are suitable, frequencies of 1-2 strokes per second have proven to be sufficient.
  • other temporal courses can also be considered.
  • the embodiment of the casting device shown in FIG. 2 is designed for use in a continuous casting plant. Accordingly, the control device 33 connected to the servo control block 26 has an input 52 for signals from a measuring device, not shown, which is attached to the mold and measures the fill level in the same. A program control 48, which acts on the control device in predetermined states, is also connected to the control device 33. Finally, the control device 33 is connected to the oscillator 34, which in turn is directly connected to the servo control block 26. Via the control device, the program controller 48 puts the oscillator 34 into operation when the former allows the slide closure to move into the closed position. The oscillator 34 acts superimposed on the control signal that is generated by the control device 32.
  • the oscillation movement is thus generated by the cylinder piston unit 24 which generates the actuating movements.
  • the program control also causes actuating signals which intervene in the control and cause on-movements of the movable slide member 14 via the servo control block 26 and the cylinder-piston unit 24.
  • a casting device according to FIG. 2 was used in a continuous casting plant.
  • the outlet channel 8 had a diameter of 45 mm.
  • a low-alloy structural steel with a content of 0.04-0.05% of metallic aluminum and a temperature which was on average 20 ° C. above the liquidus temperature was poured out of the casting vessel or distributor 2.
  • the slide part 14 brought into the closed position was controlled by the oscillator 34 and driven in an oscillating manner. Two complete oscillations per second are carried out, each consisting of a stroke of 3 mm in the opening direction and an equally long stroke in the closing direction.
  • the passage 20 remained completely covered by the base plate 12.
  • the casting operation could be restarted regularly after interruptions lasting 2 minutes.
  • the movable slide part could be moved into an open position without difficulty and the melt emerges from the pouring opening 18 without delay.
  • the program control was switched on during the casting interruptions.
  • the program control caused an interruption of the oscillation movements every 30 seconds by moving the movable slide part up and down.
  • the stroke length was set so that the movable slide part in the one end position on the outlet channel released a gap of 3 to 5 mm in width, the dwell time in this position being 1 second.
  • the melt flowing out during the upward movement reached the mold and could be taken up for 3 minutes without exceeding the volume reserve present in it or due to contraction of the strand.
  • the after this interruption period he The resumption of the casting operation was easy and there were no signs of freezing of the discharge channel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Continuous Casting (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Closures For Containers (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Processing Of Solid Wastes (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
EP82104015A 1981-06-01 1982-05-08 Verfahren zum Verhindern des Einfrierens von metallischen Schmelzen im Auslaufkanal eines Giessgefässes und Giesseinrichtung für metallische Schmelzen zur Durchführung des Verfahrens Expired EP0066118B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82104015T ATE11018T1 (de) 1981-06-01 1982-05-08 Verfahren zum verhindern des einfrierens von metallischen schmelzen im auslaufkanal eines giessgefaesses und giesseinrichtung fuer metallische schmelzen zur durchfuehrung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3546/81A CH653269A5 (de) 1981-06-01 1981-06-01 Verfahren zum verhindern des einfrierens von metallischen schmelzen im auslaufkanal eines giessgefaesses.
CH3546/81 1981-06-01

Publications (2)

Publication Number Publication Date
EP0066118A1 EP0066118A1 (de) 1982-12-08
EP0066118B1 true EP0066118B1 (de) 1985-01-02

Family

ID=4258313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104015A Expired EP0066118B1 (de) 1981-06-01 1982-05-08 Verfahren zum Verhindern des Einfrierens von metallischen Schmelzen im Auslaufkanal eines Giessgefässes und Giesseinrichtung für metallische Schmelzen zur Durchführung des Verfahrens

Country Status (10)

Country Link
US (1) US4759479A (es)
EP (1) EP0066118B1 (es)
JP (1) JPS57209770A (es)
AT (1) ATE11018T1 (es)
CA (1) CA1190022A (es)
CH (1) CH653269A5 (es)
DE (1) DE3261752D1 (es)
ES (2) ES512677A0 (es)
IN (1) IN160850B (es)
MX (1) MX158021A (es)

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Publication number Priority date Publication date Assignee Title
US4896801A (en) * 1967-07-11 1990-01-30 Flo-Con Systems, Inc. Method for controlling the discharge channel of a casting container (tundish) for metallic meltings, and a device for carrying out the method
JPS6156766A (ja) * 1984-08-24 1986-03-22 Sumitomo Metal Ind Ltd 溶融金属の注入方法
JPS6254566A (ja) * 1985-05-10 1987-03-10 Sumitomo Metal Ind Ltd 溶鋼供給量の制御方法および制御装置
US4694885A (en) * 1985-06-06 1987-09-22 Hitachi Zosen Corporation Apparatus for continuous casting of thin metallic plate
DE3616115A1 (de) * 1986-05-13 1987-11-19 Zimmermann & Jansen Gmbh Verfahren zum beherrschen des auslaufkanales eines giessgefaesses fuer metallische schmelzen und giesseinrichtung zur durchfuehrung des verfahrens
AU2318388A (en) * 1987-09-24 1989-04-18 Hermann Schwabe Process and device for regulating the inflow of liquid into a container
DE3742215A1 (de) * 1987-12-12 1989-06-22 Metacon Ag Verfahren zum freihalten des durchflusskanals von schiebeverschluessen an stranggiessanlagen
ATE74544T1 (de) * 1988-08-31 1992-04-15 Metacon Ag Verfahren zum steuern von schieberverschluessen, insbesondere an stranggiessanlagen.
CH678701A5 (es) * 1989-03-31 1991-10-31 Stopinc Ag
IE910080A1 (en) * 1990-01-16 1991-07-31 Flogates Ltd Metal pouring method and apparatus
GB2311947A (en) * 1996-03-12 1997-10-15 Flogates Ltd Sliding gate valve
EP0937969B1 (de) * 1998-02-18 2004-07-07 Mann + Hummel ProTec GmbH Vorrichtung für rieselfähige Schüttgüter
GB0013133D0 (en) * 2000-05-31 2000-07-19 Ibm Volumetric pump
US9964498B2 (en) * 2015-09-11 2018-05-08 Baylor University Electromagnetic steam energy/quality, flow, and fluid property sensor and method
KR101960935B1 (ko) * 2017-08-24 2019-03-21 주식회사 포스코 래들 및 이를 이용한 용강 처리 방법
CN113828765A (zh) * 2021-09-22 2021-12-24 重庆钢铁股份有限公司 一种中间包滑板气动控制机构
US20240165698A1 (en) * 2022-11-23 2024-05-23 Ajf, Inc. Vibratory System And Method For Molten Steel Transfer

Citations (1)

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Publication number Priority date Publication date Assignee Title
US3773226A (en) * 1970-04-23 1973-11-20 Didier Werke Ag Container with sliding shutter for a liquid melt

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Publication number Priority date Publication date Assignee Title
US3040768A (en) * 1959-08-13 1962-06-26 Double A Products Company Oscillating valve
US3866806A (en) * 1973-03-01 1975-02-18 United States Steel Corp Operating mechanism for slidable gates and method of operating slide gate
JPS5345774B2 (es) * 1973-03-06 1978-12-08
JPS50110936A (es) * 1974-02-13 1975-09-01
US4077457A (en) * 1974-03-06 1978-03-07 Sumitomo Metal Industries Limited Molten metal pouring control method and apparatus for use in continuous casting equipment
US3906975A (en) * 1974-03-08 1975-09-23 Gen Motors Corp Hydraulic pulsed governor
US4092771A (en) * 1974-03-27 1978-06-06 Metacon Ag Process and apparatus for renewing sliding gate valve units for casting ladles
ES437798A1 (es) * 1974-05-24 1977-05-16 Metacon Ag Procedimiento para el montaje de cierres de corredera para cucharas de colada.
CH571374A5 (es) * 1974-07-12 1976-01-15 Metacon Ag
US4076153A (en) * 1974-10-24 1978-02-28 Metacon Ag Plate structure for a liquid metal container closure
JPS5182664A (es) * 1974-12-27 1976-07-20 Kurosaki Refractories Co
CH576087A5 (es) * 1975-01-16 1976-05-31 Metacon Ag
DE2918344A1 (de) * 1979-05-07 1980-11-20 Metacon Ag Schieberverschluss fuer den abstichkanal eines metallurgischen ofens oder gefaesses
DE2918333A1 (de) * 1979-05-07 1980-11-20 Metacon Ag Metallurgischer ofen

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US3773226A (en) * 1970-04-23 1973-11-20 Didier Werke Ag Container with sliding shutter for a liquid melt

Also Published As

Publication number Publication date
JPH0123230B2 (es) 1989-05-01
US4759479A (en) 1988-07-26
CH653269A5 (de) 1985-12-31
EP0066118A1 (de) 1982-12-08
DE3261752D1 (en) 1985-02-14
ES8500576A1 (es) 1984-11-16
ES8308735A1 (es) 1983-10-16
ES512677A0 (es) 1983-10-16
ES522928A0 (es) 1984-11-16
ATE11018T1 (de) 1985-01-15
CA1190022A (en) 1985-07-09
IN160850B (es) 1987-08-08
MX158021A (es) 1988-12-29
JPS57209770A (en) 1982-12-23

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