EP0245580A2 - Procédé et dispositif pour réguler l'écoulement d'une buse de coulée d'un récipient pour métal en fusion - Google Patents

Procédé et dispositif pour réguler l'écoulement d'une buse de coulée d'un récipient pour métal en fusion Download PDF

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Publication number
EP0245580A2
EP0245580A2 EP87100137A EP87100137A EP0245580A2 EP 0245580 A2 EP0245580 A2 EP 0245580A2 EP 87100137 A EP87100137 A EP 87100137A EP 87100137 A EP87100137 A EP 87100137A EP 0245580 A2 EP0245580 A2 EP 0245580A2
Authority
EP
European Patent Office
Prior art keywords
slide
plate
outlet channel
slide plate
head plate
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Withdrawn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
EP87100137A
Other languages
German (de)
English (en)
Other versions
EP0245580A3 (fr
Inventor
Josef Lothmann
Friedhelm Paulus
Ludwig Walther
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.)
Zimmermann and Jansen GmbH
Original Assignee
Zimmermann and Jansen GmbH
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 Zimmermann and Jansen GmbH filed Critical Zimmermann and Jansen GmbH
Publication of EP0245580A2 publication Critical patent/EP0245580A2/fr
Publication of EP0245580A3 publication Critical patent/EP0245580A3/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • B22D41/62—Pouring-nozzles with stirring or vibrating means

Definitions

  • the invention relates to a method for controlling the outlet channel of a casting vessel for metallic melts according to the preamble of claim 1, and a casting device for performing this method.
  • EP-A-66 118 it is proposed in EP-A-66 118 to drive the movable slide part of the slide closure in an oscillating manner in its closed position during pouring interruptions, namely in the direction of the opening and closing of the slide part.
  • the slide part is coupled to a vibrator controlled by an oscillator.
  • a still unsolved problem is the penetration of ambient air into the outlet channel between the contact surfaces of the top plate and bottom part of the casting vessel on the one hand and slide plate and head plate or slide plate and pouring part on the other.
  • the ambient air sucked into the outlet channel during the casting process is extremely problematic metallurgically, since the amount of additional Nitrogen and oxygen is uncontrolled.
  • the formation and possibly deposition of alumina is promoted by the sucked-in ambient air, especially in the somewhat cooler area of the pouring part (immersion tube).
  • the present invention is therefore also based on the object of solving this problem, at least considerably reducing it.
  • the meaning of the present invention thus lies in the two-dimensional relative movement between the slide part and head plate, this relative movement being obtained either by the slide part or the slide plate or head plate alone or by a correspondingly coordinated movement of the slide and head plate, the seal in the latter case between the contact surfaces both of the top plate and bottom of the casting vessel on the one hand and of the top plate and slide plate or slide plate and pouring part on the other hand is considerably improved.
  • the abovementioned contact surfaces are literally "ground in", a two-dimensional relative movement between the abovementioned contact surfaces resulting in an almost absolute seal.
  • the relative movement according to the invention also ensures that, in the closed position of the slide part, the melt in the outlet channel is at least close to the slide part, namely the slide plate, stirred or stirred. In this way, a much greater depth effect is obtained than by simply moving the slide part back and forth according to EP-A-66 118. Because of this greater depth effect freezing of the melt in the outlet channel can also be reliably avoided even in the event of prolonged interruptions in casting or operation. As a result of the relative movement according to the invention, there is even a slight vertical circulation of the melt in the outlet channel, which also contributes to preventing the melt from freezing.
  • the relative movement provided according to the invention constantly changes the position of a shadow corner or flow-free zone which forms below the head plate, with a constant large free cross section of the outlet channel in this area. Due to the "wandering" shadow corner, oxide deposits in the area of the slide closure are reliably avoided, since there is a constant rinsing off. Due to the fact that the pouring jet rotates constantly around the axis of the outlet channel in accordance with the change in position of the shadow corner, possible oxide deposits in the somewhat cooler pouring part, namely the immersion tube, are also better rinsed and thus largely avoided.
  • the solution according to the invention is also particularly advantageous because it can easily be used with conventional slide closures. Retrofitting the slide locks is very easy. In the case of slide closures with interchangeable and regulating cylinders, essentially only the hydraulics of these cylinders have to be "pulsed” so that the slide executes the intended movements. The most varied trajectories (Lissajous figures) can be obtained. Frequency and amplitude are preferably adjustable. This is also very important in the closed position; it can be advantageous, for example, that the frequency of the changing and regulating cylinders is increased accordingly with increasing duration of an interruption of operation, in order in this way to obtain an increased "stirring" of the melt and thus an increased depth effect of the moving slide part.
  • the frequency increase mentioned essentially means nothing more than an increased path speed of the slide part and / or the head plate. But even with relatively slow movements supply of slide part and / or head plate in the closed position a greater depth effect is achieved than in the known solution according to EP-A-66 118, due to the two-dimensional influence of the melt in the area near the slide plate in each movement point.
  • the reference number 10 denotes the lower part of a casting vessel, in the bottom 13 of which a pouring sleeve 14 made of refractory material is arranged.
  • the pouring sleeve 14 delimits an upper part of an outlet channel 15, which continues downward in the top plate 7 of a conventional slide closure, generally designated 12.
  • the slide closure 12 comprises a plate-shaped, movable slide part or a slide plate 8, as well as a pouring part rigidly connected to the head plate 7 in the form of a pouring plate 9, to which an immersion tube 16 is fastened.
  • the pouring plate 9 and the immersion tube 16 have a pouring opening 17 aligned with the outlet channel 15, while the slide plate 8 has a passage 18.
  • the between the head plate 7 and pouring plate 9 tightly clamped but displaceable transversely to the outlet channel 8 is movable by means of a diametrically arranged control cylinder 5 between an open position, in which the passage 18 is aligned with the outlet channel 15, and a closed position in which the Connection between the outlet channel 15 and the pouring opening 17 is interrupted.
  • the open position of the slide plate 8 is carried out by means of the hydraulic Actuable control cylinder 5 the regulation of the degree of opening of the passage 18th
  • the slide plate 8 is also assigned an exchangeable cylinder 6, by means of which the slide plate 8 and also the pouring part 9, 16 can be replaced without interrupting the casting.
  • control cylinders 5 By means of the effective regulating cylinders 5, which are arranged diametrically to the outlet duct 15, the slide plate - as already explained above - is brought into or out of the closed position, and the latter is regulated with regard to the degree of opening.
  • the control cylinders 5 define a slide plate movement axis X-X. It is also called the control axis.
  • the exchange cylinder 6 which is also effective transversely to the outlet channel 15, is activated, the direction of action Y of the exchange cylinder 6 extending perpendicular to the control axis X-X.
  • the direction of action Y of the interchangeable cylinder 6 defines the so-called interchangeable axis.
  • the changing of the slide plate 8 is done in such a way that a new slide plate 8 ⁇ is inserted from the right side of the slide lock housing in FIG. 2 to the middle. This slide plate 8 ⁇ then lies between the change cylinder 6 and the slide plate 8 in the casting position. By moving the change cylinder 6, the new slide plate 8 ⁇ is brought into the casting position within 0.2 s and the used slide plate 8 is ejected backwards (arrow 11) . Then the hydraulic change cycle runs linder 6 back and releases the slot for a new slide plate (or shut-off plate 8 ⁇ ).
  • the slide plate 8 or 8 ⁇ can be opened by the side regulating cylinder 5 in any throttle position between 0% and 100%.
  • the plate change takes place in FIG. 2 in the "level 2".
  • the "level 1" is defined by the head plate 7.
  • In the lowest “level 3” is the pouring or. Immersion tube holding plate 9.
  • the change of the slide plate 8 and the change of the dip tube holding plate 9 are carried out from the same change cylinder 6, but at different speeds.
  • the slide plate 8 is brought into the closed position by means of the regulating cylinder 5.
  • the replacement immersion tube holding plate 9rohr together with the new immersion tube 16 ⁇ is inserted from right to left into a lower lateral insert in FIG. 2 and by the Interchangeable cylinder 6 - this time with a much lower Ge speed - move to the pouring position.
  • the old dip tube 16 is pushed out backwards (arrow 20).
  • the locking pins are inserted and the watering vessel is lowered again.
  • the slide plate 8 is moved from the closed position into the open position and the casting process is continued.
  • the interruption of the casting process can be kept under 40 s with a tried and tested team. Nevertheless, even with such short interruptions in casting, there is a risk that the melt will freeze in the outlet channel 15. This risk is particularly great in the event of unforeseen long interruptions in the pouring.
  • the invention provides for the interchangeable cylinder 6 or the pressure plate 21 of the same to the guide frame 19 for the slide plates 8, 8 'to be coupled so that in cooperation with the control cylinders 5 of the guide frame 19 and thus the outlet channel 15 associated slide plate 8 or 8' can be moved in the X and Y directions are that the slide plate assigned to the outlet channel 15 executes a movement along a closed curved path, preferably a circular path with a center point offset with respect to the longitudinal axis of the outlet channel 15, both in the closed position and in the open or partially open position.
  • the path speed, here the circular speed of the slide plate 8 is preferably approximately constant.
  • the hydraulic system usually assigned to the regulating cylinders 5 and the exchangeable cylinder 6 comprises a 4/3-way valve 22, with which the change of dip tube and slide plate can normally be controlled, and a servo or proportional valve 23, with which the regulating movements of the slide plate 8 or 8 ⁇ can be controlled.
  • This known hydraulic system is now supplemented by a servo or proportional valve 24.
  • This is arranged in a hydraulic connection between the hydraulic connecting lines to the interchangeable cylinder 6 on the one hand and the hydraulic connecting lines to the regulating cylinders 5 on the other hand, the first-mentioned connection between the interchangeable cylinder 6 and the 4/3-way valve 22 and the other connection before the servo or proportional valve 23.
  • the fluid connection with the servo or proportional valve 24 is identified in FIG. 6 by the reference numbers 25, 26.
  • the information "P" and “T” refer to the connection to "pump" and "tank".
  • the servo or proportional valve 24 is responsible for the relative movement of the guide frame 19 or the slide plate 8 (or 8 ⁇ ) in the direction of the YY axis (change axis).
  • the movement of the slide plate in the XX axis is brought about by the control cylinders 5 which are present anyway.
  • the servo or proportional valve 23 is connected to a predetermined frequency. Accordingly, a frequency is applied to the valve 24, the valve 22 then remaining closed.
  • the valves 23 and 24 are preferably phase-shifted in frequency, the preferred circular movement of the guide frame 19 or the slide plate 8 being obtained with a phase shift of 90 °.
  • the rule cylinder lies 5 the so-called "master frequency f1 ⁇ and on the interchangeable cylinder 6 the so-called" slave frequency f2 ⁇ . Both oscillation movements are shifted by 90 °. This results in a uniform circular movement of the slide plate 8 in the closing and / or open or partially open position of the same.
  • the above-mentioned frequency lockups can therefore take place both in the closed and open or partially open position, that is to say in every position of the slide plate.
  • a predetermined time rhythm e.g. to postpone a signal every 5 s during the frequency feed-in to the valves 23 and 24, specifically to the valve 24, through which the piston 27 assigned to the interchangeable cylinder 6 is pushed to the lower stop in FIG. 6.
  • Fig. 8 the electronic control for the frequency application of the valves 23 and 24 is shown schematically.
  • the pilot valves of the servo or proportional valves 23, 24 are each assigned variable power amplifiers 28, 29, with a variable phase shifter 30 being connected upstream of the power amplifier 29.
  • Both power amplifiers are controlled by a common frequency generator 31, which can be changed with regard to frequency and preferably also amplitude, the amplitude 10 being in the open or partially open position of the slide plate 8 and with a center of the movement path of the slide plate arranged offset relative to the longitudinal axis of the outlet channel is chosen so that it corresponds at least to the distance between the center 44 of the (circular) movement path 43 of the slide plate and the longitudinal axis 45 of the outlet channel 15.
  • the outlet channel 15 is completely cleared at least once, ie is free of shadow corners.
  • the amplitude must be determined in the open or partial open position so that the movement path extends through the longitudinal axis 45 of the outlet channel 15. If the closed trajectory includes the longitudinal axis 45 of the outlet channel 15, a shadow corner 47 that is being formed moves along the periphery of the outlet channel 15.
  • Frequency and amplitude in the X and Y directions should be set so that the relative movement between slide plate 8 on the one hand and head plate 7 or immersion tube holding plate 9 on the other takes place along a closed circular path, the center of which lies on the longitudinal axis 45 of the outlet channel 15.
  • the movement path can also have a different shape, for example elliptical. Of particular interest in the closed position is that it is not lifted.
  • the power amplifier 28 is assigned to the valve 23 and the power amplifier 29 to the valve 24.
  • the valve 23 controls the movement of the slide plate in the X-X direction; the valve 24 is responsible for the movement of the slide plate in the Y-Y direction.
  • the shape of the cam track can also be influenced by the phase shifter.
  • reference Number 1 a mounting plate, reference number 2 the slide housing, reference number 3 a pressure system and the reference number 4 fastening screws.
  • FIGS. 3 to 5b the invention will now be illustrated with the aid of a second, known embodiment of a distributor gutter slide closure, parts which this slide closure has in common with that according to FIGS. 1 and 2 are identified by the same reference numerals. In this regard, reference is made to the preceding description.
  • the slide closure 12 of this embodiment comprises a base plate 35 in the bottom of the casting vessel (e.g. intermediate pan).
  • a mounting plate 1 is arranged below this.
  • An intermediate plate 34 adjoins this at the bottom.
  • the slide housing 2 is fastened to the underside of the same. This is followed by a protective plate 33 at the bottom.
  • the slide plate 8 can be moved in and out of the closed position transversely to the outlet channel 15 by means of a control cylinder 5 in the direction of the X-X axis (control axis).
  • the regulation of the throttle position of the slide plate 8 takes place in a manner similar to that in the embodiment according to FIGS. 1 and 2.
  • Immersion tube holding plate 9 together with immersion tube 16 can be replaced by a separate manipulator. This is not shown in detail because it is well known.
  • Fig. 4 the functional principle of the slide closure according to Fig. 3 is shown schematically.
  • the slide plate 8 is mounted inside of the slide housing 2 modified in accordance with FIGS. 5a, 5b.
  • the slide plate 8 is held within a slide frame 36.
  • the control cylinder 5 or its piston rod is coupled to this.
  • the slide plate 8 together with the slide frame 36 can be moved back and forth in the direction of the control axis XX.
  • a further movement in the direction of the axis YY which is perpendicular thereto and also extends transversely to the outlet channel is to be superimposed on this movement.
  • pressure elements 37, 38 which act laterally on the slide frame 36 and can be acted upon hydraulically. These pressure elements are mounted in the slide housing 2 in a fluid-tight manner.
  • the control cylinders 5 and the side pressure elements 37, 38 are preferably controlled by separate fluid lines and servo valves, with control of the control cylinder 5 and the side pressure elements 37, 38 being followed by a 90 ° phase shift in order to achieve a circular movement of the slide plate within the slide housing 2 got to. If the lateral pressure elements 37, 38 are closed parallel to the regulating cylinder 5 (dashed line in FIG. 5a), only a 180 ° shift in the frequencies is possible. This results in only two possible, linear rectilinear movements, each inclined at 45 ° to the horizontal and perpendicular to each other.
  • the pressure element 37 accordingly comprises a pressure tappet 39 which bears on the one hand on the slide frame 36 and on the other hand on a membrane 40.
  • the membrane 40 delimits a fluid space 41 provided in the side wall of the slide housing 2, into which a pressure medium connection 42 opens. Pressure medium pulsations are thus caused by the Pressure medium connection 42 and fluid chamber 41 transferred to the membrane 40 and thus to the pressure tappet 39. Accordingly, the slide frame 36 and thus the slide plate 8 is laterally acted upon or moved.
  • the pressurization of the diametrically opposite pressure element 38 takes place in a manner opposite to that of the pressure element 37.
  • One of the two pressure elements 37 or 38 can be replaced by an elastic element, e.g. mechanical spring or gas spring.
  • FIG. 9 shows schematically the action on the head plate 7 in the X and / or Y direction, the movement of the head plate 7 being able to take place in the same way as the movement of the slide plate 8 in accordance with the preceding description.
  • the top plate 7 can be coupled to control cylinders acting in the X and / or Y direction.
  • the head plate 7 is preferably arranged in a plate frame corresponding to the slide frame 36 according to FIG. 5 a and the head plate frame is mounted so that it can move back and forth within the head plate housing in the X and Y directions, likewise, for example, corresponding to the slide frame 36 inside the slide housing 2 according to Fig. 5a.
  • pressure elements mounted within the head plate housing can act on it, corresponding to the pressure elements 37, 38 according to FIGS. 5a and 5b.
  • the hydraulic control of the pressure elements can take place according to FIG. 6. Accordingly, in extreme cases, an oscillating movement of the head plate 7 transversely to the outlet channel, but also a movement of the head plate 7 along a closed curved path, for example a circular or elliptical path, is possible.
  • the movement of the head plate 7 in the form described can likewise take place both in the closed and in the open position of the slide plate 8.
  • the slide plate 8 can be moved as described above, so that the movements of the head plate 7 and slide plate 8 as a whole are superimposed. If the circular movement is shifted in phase in the closed position of the slide plate, an even higher stirring effect can be exerted on the melt arranged above the slide plate 8.
  • a particularly simple construction is characterized in that the slide plate 8 and head plate 7 each oscillate transversely to the outlet channel 15, i.e. are moved back and forth, with the oscillation directions X, Y being perpendicular to one another and coordinated with one another in such a way that a relative movement along a closed curved path arises between the slide plate and the top plate, in particular in the open or partially open position of the slide plate 8 relative to the top plate 7 forms an approximately crescent-like shadow corner 47 which moves around the axis of the outlet channel 15, this relative movement of the slide and top plate also being able to be carried out in the closed position. In the closed position there is of course no real shadow corner, but only an "imaginary shadow corner".
  • an oscillating piston-cylinder unit (preferably hydraulically actuated) needs to be coupled to the head plate such that the head plate is moved back and forth in the Y direction and the slide plate in the X direction.
  • the same relative displacement between the head plate and slide plate can be obtained as can be obtained by moving the slide plate or head plate in each case solely in the manner described above.
  • the dip tube or the dip tube holding plate 9 can be used with one not shown Vibrator can be coupled to remove or vibrate alumina deposits in the pouring opening 17 of the dip tube 16. This is preferably done in the embodiment according to FIGS. 1 and 2 by means of the interchangeable cylinder 6 with the slide plate 8 closed. After coupling the interchangeable cylinder 6 to the pouring part, consisting of an immersion tube holding plate 9 and an immersion tube 16, only a sufficiently high frequency has to be applied to the interchangeable cylinder 6 will. The frequency can be applied, for example, via the servo or proportional valve 24 described with reference to FIG. 6 together with the variable ballast valve.
  • ambient air is preferably sucked in, especially in the area of flow-free zones or from shadow corners, so that the sealing effect achieved by the relative movement provided according to the invention is of very essential importance in addition to avoiding static edges.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
EP87100137A 1986-05-13 1987-01-08 Procédé et dispositif pour réguler l'écoulement d'une buse de coulée d'un récipient pour métal en fusion Withdrawn EP0245580A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3616115 1986-05-13
DE19863616115 DE3616115A1 (de) 1986-05-13 1986-05-13 Verfahren zum beherrschen des auslaufkanales eines giessgefaesses fuer metallische schmelzen und giesseinrichtung zur durchfuehrung des verfahrens

Publications (2)

Publication Number Publication Date
EP0245580A2 true EP0245580A2 (fr) 1987-11-19
EP0245580A3 EP0245580A3 (fr) 1988-11-09

Family

ID=6300743

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87100137A Withdrawn EP0245580A3 (fr) 1986-05-13 1987-01-08 Procédé et dispositif pour réguler l'écoulement d'une buse de coulée d'un récipient pour métal en fusion

Country Status (2)

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EP (1) EP0245580A3 (fr)
DE (1) DE3616115A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2875513A1 (fr) * 2004-09-21 2006-03-24 Electricite De France Procede de protection d'une gaine en ceramique de thermoplongeur, pour bain metallique non ferreux, et thermoplongeur equipe d'un dispositif de protection de sa gaine
US20240165698A1 (en) * 2022-11-23 2024-05-23 Ajf, Inc. Vibratory System And Method For Molten Steel Transfer

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE163583T1 (de) * 1993-04-19 1998-03-15 Vesuvius France Sa Keramischer bausatz für einen giessverschluss und verfahren zum wechselen desselben
DE19900074A1 (de) * 1999-01-05 2000-07-06 Didier Werke Ag Stellglied am Auslauf eines Schmelzengefäßes
DE102011051346A1 (de) 2011-06-27 2012-12-27 Knöllinger FLO-TEC GmbH Schieberverschluß für ein metallurgisches Gießgefäß, insbesondere Gießpfanne

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH420498A (de) * 1965-03-09 1966-09-15 Concast Ag Vorrichtung zum Verändern der Lage des Giessstrahles, insbesondere beim Stranggiessen
CA1103921A (fr) * 1976-10-15 1981-06-30 Earl P. Shapland Traduction non-disponible
DE2652593C2 (de) * 1976-11-19 1979-05-03 Zimmermann & Jansen Gmbh, 5160 Dueren Schieberverschluß für eine Gießpfanne
DE2739750C2 (de) * 1977-09-03 1979-08-23 Zimmermann & Jansen Gmbh, 5160 Dueren Schieberverschluß für eine Gießpfanne
IN147574B (fr) * 1976-11-19 1980-04-19 Uss Eng & Consult
FR2401725A1 (fr) * 1977-08-30 1979-03-30 Detalle Richard Dispositif obturateur pour poche de coulee
CH653269A5 (de) * 1981-06-01 1985-12-31 Metacon Ag Verfahren zum verhindern des einfrierens von metallischen schmelzen im auslaufkanal eines giessgefaesses.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2875513A1 (fr) * 2004-09-21 2006-03-24 Electricite De France Procede de protection d'une gaine en ceramique de thermoplongeur, pour bain metallique non ferreux, et thermoplongeur equipe d'un dispositif de protection de sa gaine
US20240165698A1 (en) * 2022-11-23 2024-05-23 Ajf, Inc. Vibratory System And Method For Molten Steel Transfer

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Publication number Publication date
EP0245580A3 (fr) 1988-11-09
DE3616115A1 (de) 1987-11-19

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