EP0400302B1 - Method of and installation for filling a continuous casting mold with molten metal - Google Patents
Method of and installation for filling a continuous casting mold with molten metal Download PDFInfo
- Publication number
- EP0400302B1 EP0400302B1 EP90106625A EP90106625A EP0400302B1 EP 0400302 B1 EP0400302 B1 EP 0400302B1 EP 90106625 A EP90106625 A EP 90106625A EP 90106625 A EP90106625 A EP 90106625A EP 0400302 B1 EP0400302 B1 EP 0400302B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- continuous casting
- ingot mould
- casting ingot
- bath surface
- filling
- 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
Links
- 238000009749 continuous casting Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 title abstract description 5
- 239000002184 metal Substances 0.000 title abstract description 5
- 238000009434 installation Methods 0.000 title abstract 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910052786 argon Inorganic materials 0.000 claims abstract description 23
- 239000011261 inert gas Substances 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 6
- 230000001419 dependent effect Effects 0.000 abstract description 2
- 229910001338 liquidmetal Inorganic materials 0.000 abstract 6
- 238000001514 detection method Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011982 device technology Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical group O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
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
- B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
- B22D41/18—Stopper-rods therefor
- B22D41/186—Stopper-rods therefor with means for injecting a fluid into the melt
Definitions
- the invention relates to a method and a device for filling a continuous casting mold with a metallic melt, in which the melt is regulatedly poured into the continuous casting mold through a bottom opening of a metallurgical vessel, in particular a distribution channel, which can be moved up and down, whereby during the filling of the continuous casting mold, the stopper carries out predetermined upward and downward movements, in particular depending on the level of the bath level in the continuous casting mold, and furthermore during the filling of the continuous casting mold at the end of the stopper facing the bottom opening through an outlet opening provided there, inert gas, in particular argon, into the escaping melt is blown.
- inert gas in particular argon
- EP-A-0 084 416 From EP-A-0 084 416 it is known to provide a longitudinal bore in the stopper, through which inert gas, in particular argon, can be introduced into the outflowing melt during casting.
- inert gas in particular argon
- the reason for this measure is to avoid freezing of the metallic melt and the deposition of aluminum oxide in the area of the bottom opening of the metallurgical vessel (see page 3, lines 20 ff, and page 11, line 5, EP-A-0 084 416).
- the present invention is based on the object of providing a method and a device of the type mentioned at the outset, which allows fine adjustment of the bath level in the continuous casting mold while avoiding larger movements of the plug associated with the metallurgical vessel.
- the ferrostatic height of the melt in the metallurgical vessel is also regulated, as in the not yet published DE-A-38 17 580 by the applicant, according to which the actual value of the amount of melt in the metallurgical vessel at successive times determined or sensed in the form of the melt weight or the bath level and with a setpoint, d. H. the target weight or the target bath level height, and then at least if the actual value is greater than or equal to the target value, the tendency of the control deviation upwards or downwards is determined, when an upper or lower tendency limit value is approached or exceeded correspondingly reversed control signals are emitted to the stopper.
- the stopper movement can be reduced to a minimum, so that a constant strand withdrawal speed is ensured overall.
- system-inherent tolerances can also be compensated for in the best possible way.
- reference numeral 13 is a metallurgical vessel, e.g. B. a distribution channel or a so-called "tundish", characterized from a not shown Ladle molten metal 10 is supplied.
- the spout at the bottom of the vessel 13 is defined by a bottom opening 12 and an adjoining dip tube 26.
- the bottom opening 12 is assigned a plug 11 which can be moved up and down (double arrow 23) and with which the bottom opening 12 can be closed or opened in a predetermined manner.
- a continuous casting mold 25 is arranged beneath the vessel 13, and melt is supplied to the bottom opening 12 with a corresponding opening. This is subsequently cooled in the continuous casting mold and cooled in a strand guide (not shown further) to form a solid steel strand.
- the molten metal flowing out through the bottom opening 12 and the immersion tube 26 is identified by the arrows 28.
- a bath level control is provided in a manner known per se. This consists of a measuring device for the bath level in the continuous casting mold 25 and is formed by a radioactive rod radiator 27 and a diametrically opposite scintillation counter 20 as a receiver.
- the plug 11 can be raised and lowered in the metallurgical vessel 13 by means of a traverse 29 (double arrow 23).
- the free end of the crossmember 29 is fastened to a vertical support 30 which can be moved up and down by a device (not shown in more detail), depending on the bath level height determined by the bath level measuring device 20, 27, a stopper movement always being triggered should be when the bath level 14 in the continuous casting mold 25 exceeds or falls below an upper or lower limit.
- the last-mentioned limit values define a setpoint band, which can be broadened considerably by the measures described below, so that it is possible to move the within the considerably broadened setpoint band without plug movement Set and maintain the bath level to a specified setpoint height.
- the plug 11 has at its end facing the bottom opening 12 of the metallurgical vessel 13 an outlet opening 18 which is connected to an inert gas, in particular an argon source 17 and through which inert gas, in particular argon, can be introduced into the outflowing melt (arrow 15).
- the outlet opening 18 is connected to a central longitudinal bore 31 in the plug 11. This in turn is connected to the gas source or the gas reservoir 17 via a gas line 16, a control valve 19 being arranged in the connecting line 16 to regulate the amount of gas introduced into the melt, the degree of opening of which depends on that serving as a bath level sensor Scintillation counter 20 determined bath level 14 in the mold 25 is adjustable.
- valve body 21 of the control valve 19 can be moved by a mechanical, pneumatic, hydraulic or electromotive drive 24 into the closed position or a predetermined opening or throttle position, the drive 24 reacting to a bath level signal supplied by the scintillation counter 20, such that at in relation to a predetermined set value increasing bath level 14, the degree of opening of valve 19 is increased, and vice versa, so that when the bath level 14 increases in relation to a given set value, more argon is blown into the outflowing melt (arrow 15) than when the bath level falls, so that the bath level height is kept essentially constant within the specified setpoint range for a given degree of opening of the plug 11.
- the electrical connection between the scintillation counter 20 and the valve drive 24 is formed by the signal line 22.
- a comparator 32 is also arranged, which determines whether the bath level 14 in the mold 15 is still within the predetermined setpoint range. If this is exceeded, the stopper is readjusted 11.
- the corresponding signal for the plug drive, not shown, is identified by the reference number 33.
- the system described is based on the knowledge that the argon melted in the bottom opening area retains melt, more or less depending on the amount of argon injected. In this way, the described fine control of the bath level 14 in the continuous casting mold 25 is possible within the predetermined setpoint range without additional readjustment of the stopper position. With the help of the measures described, the bath level setpoint range can be widened 2 to 3 times compared to the conventional setpoint range.
- the argon can also be introduced through a gas line arranged in the bottom of the metallurgical vessel 13 and opening into the area of the bottom opening 12, which is also coupled to a controllable valve, so that depending on the deviation of the bath level 14 in the mold 25 from a setpoint value more or less argon can be blown into the outflowing melt with appropriate restraint.
- the latter measure can also be provided in addition to the argon injection through the plug 11.
- the control valve 19 is preferably actuated in cycles (digital).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Füllen einer Stranggießkokille mit metallischer Schmelze, bei dem bzw. der die Schmelze durch eine mittels eines auf- und abbewegbaren Stopfens verschließbare Bodenöffnung eines metallurgischen Gefäßes, insbesondere einer Verteilerrinne, geregelt in die Stranggießkokille gegossen wird, wobei während des Füllens der Stranggießkokille der Stopfen vorgegebene, insbesondere von der Badspiegelhöhe in der Stranggießkokille abhängige Auf- und Abwärtsbewegungen ausführt, und wobei ferner während des Füllens der Stranggießkokille am der Bodenöffnung zugewandten Ende des Stopfens durch eine dort vorgesehene Austrittsöffnung Inertgas, insbesondere Argon, in die ausströmende Schmelze eingeblasen wird.The invention relates to a method and a device for filling a continuous casting mold with a metallic melt, in which the melt is regulatedly poured into the continuous casting mold through a bottom opening of a metallurgical vessel, in particular a distribution channel, which can be moved up and down, whereby during the filling of the continuous casting mold, the stopper carries out predetermined upward and downward movements, in particular depending on the level of the bath level in the continuous casting mold, and furthermore during the filling of the continuous casting mold at the end of the stopper facing the bottom opening through an outlet opening provided there, inert gas, in particular argon, into the escaping melt is blown.
Aus der EP-A-0 084 416 ist es bekannt, im Stopfen eine Längsbohrung vorzusehen, durch die hindurch Inertgas, insbesondere Argon, während des Gießens in die ausströmende Schmelze einleitbar ist. Der Grund für diese Maßnahme besteht darin, im Bereich der Bodenöffnung des metallurgischen Gefäßes ein Einfrieren der metallischen Schmelze sowie die Ablagerung von Aluminiumoxid zu vermeiden (s. Seite 3, Zeilen 20 ff, und Seite 11, Zeile 5, der EP-A-0 084 416).From EP-A-0 084 416 it is known to provide a longitudinal bore in the stopper, through which inert gas, in particular argon, can be introduced into the outflowing melt during casting. The reason for this measure is to avoid freezing of the metallic melt and the deposition of aluminum oxide in the area of the bottom opening of the metallurgical vessel (see page 3,
Der vorliegenden Erfindung liegt nun die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung der eingangs genannten Art zu schaffen, welches bzw. welche eine Feinregelung der Badspiegelhöhe in der Stranggießkokille unter Vermeidung größerer Bewegungsausschläge des dem metallurgischen Gefäß zugeordneten Stopfens erlaubt.The present invention is based on the object of providing a method and a device of the type mentioned at the outset, which allows fine adjustment of the bath level in the continuous casting mold while avoiding larger movements of the plug associated with the metallurgical vessel.
Diese Aufgabe wird verfahrenstechnisch durch die kennzeichnenden Merkmale des Anspruches 1 und vorrichtungstechnisch durch die kennzeichnenden Merkmale des Anspruches 2 und/oder 4 gelöst.In terms of process engineering, this object is achieved by the characterizing features of claim 1 and device technology by the characterizing features of claim 2 and / or 4.
Laborversuche haben gezeigt, daß man durch mehr oder weniger intensives Einblasen von Inertgas, insbesondere Argon, in die ausströmende Schmelze im Bereich der Bodenöffnung des metallurgischen Gefäßes die Badspiegelhöhe äußerst exakt einstellen kann, insbesondere auf eine vorgegebene Sollwerthöhe, und zwar ohne daß der Stopfen dazu bewegt werden muß. Bekanntermaßen haben selbst geringste Stopfenbewegungen große Auswirkungen auf die Strömungs-Querschnittsfläche und damit auf die durch die Bodenöffnung ausströmende Schmelzenmenge mit der Folge, daß mit den herkömmlichen Maßnahmen eine Feinjustierung der Badspiegelhöhe in der Stranggießkokille praktisch nicht möglich ist. Darüber hinaus haben Stopfenbewegungen ein relativ unruhiges Strömungsbild zur Folge. Auch dies wird durch die erfindungsgemäßen Maßnahmen vermieden.Laboratory tests have shown that by blowing inert gas, in particular argon, more or less intensely into the outflowing melt in the area of the bottom opening of the metallurgical vessel, the bath level can be set extremely precisely, in particular to a predetermined setpoint height, and without the stopper moving must become. As is known, even the slightest stopper movements have a major impact on the cross-sectional flow area and thus on the amount of melt flowing out through the bottom opening, with the result that a fine adjustment of the bath level in the continuous casting mold is practically impossible with the conventional measures. In addition, plug movements result in a relatively turbulent flow pattern. This is also avoided by the measures according to the invention.
Vorzugsweise ist die ferrostatische Höhe der Schmelze im metallurgischen Gefäß, insbesondere Verteilerrinne oder "tundish" ebenfalls geregelt, und zwar wie in der noch nicht veröffentlichten DE-A-38 17 580 der Anmelderin, wonach zu aufeinanderfolgenden Zeitpunkten jeweils der Istwert der schmelzenmenge im metallurgischen Gefäß in Form des Schmelzengewichts oder der Badspiegelhöhe festgestellt bzw. getastet und mit einem Sollwert, d. h. dem Sollgewicht oder der Soll-Badspiegelhöhe, verglichen wird, und wonach anschließend zumindest dann, wenn der Istwert größer/gleich dem Sollwert ist, die Tendenz der Regelabweichung nach oben oder unten festgestellt wird, wobei bei Annäherung oder Überschreiten eines oberen oder unteren Tendenz-Grenzwertes entsprechend umgekehrte Stellsignale an den Stopfenverschluß abgegeben werden. Auf diese Weise läßt sich die Stopfenbewegung zusätzlich auf ein Minimum reduzieren, so daß insgesamt eine konstante Strangabzugsgeschwindigkeit gewährleistet ist. Mit der letztgenannten Tendenzerkennung lassen sich auch systemimmanente Toleranzen bestens kompensieren.Preferably, the ferrostatic height of the melt in the metallurgical vessel, in particular distribution channel or "tundish", is also regulated, as in the not yet published DE-A-38 17 580 by the applicant, according to which the actual value of the amount of melt in the metallurgical vessel at successive times determined or sensed in the form of the melt weight or the bath level and with a setpoint, d. H. the target weight or the target bath level height, and then at least if the actual value is greater than or equal to the target value, the tendency of the control deviation upwards or downwards is determined, when an upper or lower tendency limit value is approached or exceeded correspondingly reversed control signals are emitted to the stopper. In this way, the stopper movement can be reduced to a minimum, so that a constant strand withdrawal speed is ensured overall. With the latter trend detection, system-inherent tolerances can also be compensated for in the best possible way.
Vorteilhafte Details der erfindungsgemäßen Vorrichtung sind noch in den Ansprüchen 3 und 5 beschrieben, wobei die Maßnahme nach Anspruch 5, wonach der Badspiegelsensor mit einer Tendenzerkennungseinrichtung gekoppelt ist, durch die in Abhängigkeit von der Geschwindigkeit der Badspiegeländerung in der Stranggießkokille das Regelventil für die Argon-Einblasung steuerbar ist, eine besonders schnelle Einstellung der optimalen Argonmenge erlauben.Advantageous details of the device according to the invention are also described in claims 3 and 5, wherein the measure according to claim 5, according to which the bath level sensor is coupled to a tendency detection device, by means of which, depending on the speed of the bath level change in the continuous casting mold, the control valve for argon injection is controllable, allow a particularly rapid setting of the optimal amount of argon.
Nachstehend wird das erfindungsgemäße Verfahren im Zusammenhang mit einer erfindungsgemäß ausgebildeten Vorrichtung anhand der beigefügten schematischen Zeichnung näher erläutert. In dieser Zeichnung ist mit der Bezugsziffer 13 ein metallurgisches Gefäß, z. B. eine Verteilerrinne oder ein sogenannter "tundish", gekennzeichnet, dem aus einer nicht weiter dargestellten Gießpfanne Metallschmelze 10 zugeführt wird. Der Ausguß am Boden des Gefäßes 13 ist durch eine Bodenöffnung 12 und ein sich daran anschließendes Tauchrohr 26 definiert. Der Bodenöffnung 12 ist ein auf- und abbewegbarer (Doppelpfeil 23) Stopfen 11 zugeordnet, mit dem die Bodenöffnung 12 verschlossen oder in vorgegebener Weise geöffnet werden kann. Unterhalb des Gefäßes 13 ist eine Stranggießkokille 25 angeordnet, der unter entsprechender Öffnung der Bodenöffnung 12 Schmelze zugeführt wird. Diese wird nachfolgend in der Stranggießkokille abgekühlt und in einer nicht weiter dargestellten Strangführung zu einem festen Stahlstrang erkaltet. Die durch die Bodenöffnung 12 und das Tauchrohr 26 ausströmende Metallschmelze ist mit den Pfeilen 28 gekennzeichnet.The method according to the invention is explained in more detail below in connection with a device designed according to the invention with the aid of the attached schematic drawing. In this drawing,
Um den Zufluß der Schmelze aus dem metallurgischen Gefäß 13 in die Stranggießkokille 25 derart verändern zu können, daß der Badspiegel 14 in der Stranggießkokille etwa in der gleichen Höhe erhalten bleibt, ist in an sich bekannter Weise eine Badspiegel-Regelung vorgesehen. Diese besteht aus einer Meßeinrichtung für den Badspiegel in der Stranggießkokille 25 und wird von einem radioaktiven Stabstrahler 27 und einem diametral gegenüberliegenden Szintillationszähler 20 als Empfänger gebildet. Der Stopfen 11 ist über eine Traverse 29 in dem metallurgischen Gefäß 13 heb- und senkbar (Doppelpfeil 23). Das freie Ende der Traverse 29 ist an einer vertikalen Stütze 30 befestigt, die durch eine nicht näher dargestellte Einrichtung auf- und abbewegbar ist, und zwar in Abhängigkeit von der durch die Badspiegel-Meßeinrichtung 20, 27 festgestellten Badspiegelhöhe, wobei eine Stopfenbewegung immer dann ausgelöst werden soll, wenn der Badspiegel 14 in der Stranggießkokille 25 eine Obergrenze oder Untergrenze über- bzw. unterschreitet. Die letzterwähnten Grenzwerte definieren ein Sollwertband, welches durch die nachfolgend beschriebenen Maßnahmen erheblich verbreitert werden kann, so daß es möglich ist, ohne Stopfenbewegung innerhalb des erheblich verbreiterten Sollwertbandes die Badspiegelhöhe auf eine vorgegebene Sollwerthöhe einzustellen und zu halten. Zu diesem Zweck weist der Stopfen 11 an seinem der Bodenöffnung 12 des metallurgischen Gefäßes 13 zugewandten Ende eine mit einer Inertgas, insbesondere Argonquelle 17 verbundene Austrittsöffnung 18 auf, durch die hindurch Inertgas, insbesondere Argon, in die ausströmende Schmelze einleitbar ist (Pfeil 15). Die Austrittsöffnung 18 ist mit einer zentralen Längsbohrung 31 im Stopfen 11 verbunden. Diese wiederum steht über eine Gasleitung 16 mit der Gasquelle bzw. dem Gasreservoir 17 in Verbindung, wobei zur Regelung der in die Schmelze eingeleiteten Gasmenge in der Verbindungsleitung 16 ein Regelventil 19 angeordnet ist, dessen Öffnungsgrad in Abhängigkeit von der mittels des als Badspiegel-Sensor dienenden Szintillationszählers 20 festgestellten Badspiegelhöhe 14 in der Kokille 25 einstellbar ist. Zu diesem Zweck ist der Ventilkörper 21 des Regelventils 19 durch einen mechanischen, pneumatischen, hydraulischen oder elektromotorischen Antrieb 24 in Schließstellung oder eine vorgegebene Öffnungs- bzw. Drosselstellung bewegbar, wobei der Antrieb 24 auf ein vom Szintillationszähler 20 geliefertes Badspiegelsignal reagiert, derart, daß bei im Verhältnis zu einem vorgegebenen Sollwert steigendem Badspiegel 14 der Öffnungsgrad des Ventils 19 vergrößert wird, und umgekehrt, so daß bei im Verhältnis zu einem vorgegebenen Sollwert steigendem Badspiegel 14 mehr Argon in die ausströmende Schmelze (Pfeil 15) eingeblasen wird als bei sinkendem Badspiegel, so daß innerhalb des erwähnten Sollwertbandes die Badspiegelhöhe bei vorgegebenem Öffnungsgrad des Stopfens 11 im wesentlichen konstant gehalten wird.In order to be able to change the inflow of the melt from the
Die elektrische Verbindung zwischen dem Szintillationszähler 20 und dem Ventilantrieb 24 ist durch die Signalleitung 22 gebildet. In dieser ist noch ein Komparator 32 angeordnet, welcher feststellt, ob die Badspiegelhöhe 14 in der Kokille 15 noch innerhalb des vorgegebenen Sollwertbandes liegt. Wird dieses überschritten, erfolgt eine Nachregelung des Stopfens 11. Das entsprechende Signal zum nicht näher dargestellten Stopfenantrieb ist mit der Bezugsziffer 33 gekennzeichnet.The electrical connection between the
Dem beschriebenen System liegt die Erkenntnis zugrunde, daß durch das im Bodenöffnungsbereich eingeblasene Argon Schmelze zurückgehalten wird, und zwar in Abhängigkeit von der Menge des eingeblasenen Argons mehr oder weniger. Auf diese Weise ist die beschriebene Feinregelung der Badspiegelhöhe 14 in der Stranggießkokille 25 innerhalb des vorgegebenen Sollwertbandes ohne zusätzliche Nachjustierung der Stopfenstellung möglich. Das Badspiegel-Sollwertband kann mit Hilfe der beschriebenen Maßnahmen im Vergleich zum herkömmlichen Sollwertband auf das 2- bis 3-fache verbreitert werden.The system described is based on the knowledge that the argon melted in the bottom opening area retains melt, more or less depending on the amount of argon injected. In this way, the described fine control of the
Die Einleitung von Argon kann auch durch eine im Boden des metallurgischen Gefäßes 13 angeordnete und in den Bereich der Bodenöffnung 12 mündende Gasleitung erfolgen, die ebenfalls mit einem regelbaren Ventil gekoppelt ist, so daß in Abhängigkeit von der Abweichung der Badspiegelhöhe 14 in der Kokille 25 von einer Sollwerthöhe mehr oder weniger Argon in die ausströmende Schmelze unter entsprechender Zurückhaltung derselben einblasbar ist. Letztgenannte Maßnahme kann auch zusätzlich zu der Argon-Einblasung durch den Stopfen 11 vorgesehen sein.The argon can also be introduced through a gas line arranged in the bottom of the
Um die Ansteuerung der optimalen Argonmenge zu beschleunigen, ist es denkbar, den Badspiegelsensor 20 mit einer Tendenzerkennungseinrichtung (nicht dargestellt) zu koppeln, durch die die Geschwindigkeit der Badspiegeländerung in der Kokille 25 festgestellt wird und durch die in Abhängigkeit von der festgestellten Änderungsgeschwindigkeit das Regelventil 19 steuerbar ist, und zwar so, daß die Änderung der Badspiegelhöhe 14 in Tendenzrichtung verzögert wird.In order to accelerate the actuation of the optimal amount of argon, it is conceivable to couple the
Vorzugsweise erfolgt die Ansteuerung des Regelventils 19 taktweise (digital).The
Statt der vorbeschriebenen Badspiegel-Meßeinrichtung mit Stabstrahler und Szintillationszähler können auch elektromagnetische oder optische Badspiegel-Meßeinrichtungen herkömmlicher art vorgesehen sein. Diesbezüglich handelt es sich um eine an sich bekannte Einrichtung.Instead of the above-described bath level measuring device with rod emitter and scintillation counter, electromagnetic or optical bath level measuring devices of conventional type can also be provided. In this regard, it is a known device.
- 1010th
- Schmelzemelt
- 1111
- StopfenPlug
- 1212th
- BodenöffnungBottom opening
- 1313
- metallurgisches Gefäßmetallurgical vessel
- 1414
- BadspiegelhöheBath mirror height
- 1515
- Pfeilarrow
- 1616
- VerbindungsleitungConnecting line
- 1717th
- Inertgas-, insbesondere ArgonquelleInert gas, especially argon source
- 1818th
- AustrittsöffnungOutlet opening
- 1919th
- DrosselventilThrottle valve
- 2020th
- Sensor (insbesondere Szintillationszähler)Sensor (especially scintillation counter)
- 2121
- VentilkörperValve body
- 2222
- SignalleitungSignal line
- 2323
- DoppelpfeilDouble arrow
- 2424th
- Antriebdrive
- 2525th
- StranggießkokilleContinuous casting mold
- 2626
- TauchrohrDip tube
- 2727
- StabstrahlerRod heater
- 2828
- StrömungspfeilFlow arrow
- 2929
- Traversetraverse
- 3232
- Stützesupport
- 3131
- LängsbohrungLongitudinal bore
- 3232
- KomparatorComparator
- 3333
- StopfenantriebssignalPlug drive signal
Claims (5)
- Process for filling a continuous casting ingot mould (25) with metallic melt (10), in which- the melt (10) is poured into the continuous casting ingot mould (25) through a closable floor opening (12) of a metallurgic container (13), in particular a distributor duct,- a stopper (11) provided in the metallurgic container (13) is moved up and down during the filling of the continuous casting ingot mould (25) in order to open or close the floor opening (12) in a predetermined way, in particular in dependence upon the bath surface height (14) in the continuous casting ingot mould (25), and in which- during the filling of the continuous casting ingot mould (25) inert gas, in particular argon, is blown in (arrow 15) at the end of the stopper (11) facing the floor opening (12),characterised in that
the inert gas, in particular argon, is blown in in dependence upon the bath surface height (14) in the continuous casting ingot mould (25) in such a way that in the case of a bath surface (14) increasing with respect to a predetermined desired value, more argon is blown in than when the bath surface is falling so that when the stopper (11) is open to a predetermined degree the bath surface height (14) is kept substantially constant. - Device for filling a continuous casting ingot mould (25) with metallic melt (10), comprising- a metallurgic container (13) in particular a distributor duct, with a floor opening (12) which can be opened or closed by a stopper (11) which can move up and down, wherein the stopper (11) comprises, at the end facing the floor opening (12), an outlet opening (18) connected by way of a line (16, 31) to an inert gas source, in particular an argon source (17),- and a sensor (20) which determines the bath surface height (14) in the continuous casting ingot mould (25),characterised in that
in the connecting line (16) to the inert gas source, in particular argon source (17), a control valve (19) is disposed, of which the degree of opening is adjustable in dependence upon the bath surface height (14) in the continuous casting ingot mould (25) determined by means of the sensor (20). - Device according to claim 2, characterised in that the control valve (19) comprises a valve body (21) which can be moved by a mechanical, pneumatic, hydraulic or electromotive drive (24), wherein the drive (24) reacts to a signal supplied by the sensor (20) (signal line 22) in such a way that when the bath surface (14) is increasing with respect to a predetermined desired value, the degree of opening of the valve (19) is increased and vice versa.
- Device for filling a continuous casting ingot mould (25) with metallic melt (10), comprising- a metallurgic container (13) in particular a distributor duct, with a floor opening (12) which can be closed by a stopper (11) which can move up and down,- and a sensor (20) which determines the bath surface height (14) in the continuous casting ingot mould (25), in particular according to one of claims 2 or 3,characterised in that
in order to introduce inert gas, in particular argon, a gas line issuing into the region of the floor opening (12) is provided in the floor of the metallurgic container (13), the said gas line comprises a controllable valve so that, in dependence upon the deviation of the bath surface height (14) in the continuous casting ingot mould (25) from the height of the desired value, more or less inert gas can be blown into the out-flowing melt with corresponding holding-back of the same. - Device according to any of claims 2 to 4, characterised in that the sensor (20) is coupled to a tendency recognition device, by means of which the control valve (19) can be controlled in dependence upon the speed of the change in the bath surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3917403 | 1989-05-29 | ||
| DE3917403A DE3917403C2 (en) | 1989-05-29 | 1989-05-29 | Method and device for filling a continuous casting mold with a metallic melt |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0400302A2 EP0400302A2 (en) | 1990-12-05 |
| EP0400302A3 EP0400302A3 (en) | 1992-04-22 |
| EP0400302B1 true EP0400302B1 (en) | 1995-08-02 |
Family
ID=6381579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90106625A Expired - Lifetime EP0400302B1 (en) | 1989-05-29 | 1990-04-06 | Method of and installation for filling a continuous casting mold with molten metal |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0400302B1 (en) |
| AT (1) | ATE125740T1 (en) |
| DE (2) | DE3917403C2 (en) |
| ES (1) | ES2077601T3 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19852289A1 (en) * | 1998-11-13 | 2000-05-25 | Messer Austria Gmbh Gumpoldski | Process and device for regulating pouring jets |
| DE102009004613B4 (en) | 2009-01-15 | 2020-01-02 | Bayerische Motoren Werke Aktiengesellschaft | Reservoir for liquid casting material, in particular a stopper pan, and method for filling a stopper pan |
| CN104001892B (en) * | 2014-06-12 | 2017-08-11 | 鞍钢股份有限公司 | Method for adjusting argon flow of tundish |
| WO2022029300A1 (en) * | 2020-08-06 | 2022-02-10 | Sms Group Gmbh | Vacuum induction casting device for casting metal and metal alloys under a vacuum and/or a protective gas atmosphere, and method for changing a stopper rod and/or a closure body of a stopper casting device on a vacuum induction casting device |
| CN114540668B (en) * | 2022-01-21 | 2022-10-25 | 中航上大高温合金材料股份有限公司 | Smelting process for producing high-temperature alloy GH4049 difficult to deform from high-purity return material |
| CN116855920B (en) * | 2023-09-05 | 2023-11-21 | 山西中设华晋铸造有限公司 | Steel strip casting process |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH628543A5 (en) * | 1978-06-01 | 1982-03-15 | Concast Ag | METHOD AND DEVICE FOR CONTINUOUSLY CASTING METAL IN SINGLE OR MULTIPLE STRAND PLANTS. |
| DE3365737D1 (en) * | 1982-01-18 | 1986-10-09 | Stephen David Mills | Stopper support mechanism for casting containers |
| GB8411596D0 (en) * | 1984-05-05 | 1984-06-13 | Thor Ceramics Ltd | Stopper |
| JPS6195756A (en) * | 1984-10-16 | 1986-05-14 | Nippon Steel Corp | Stopper for gas blowing tundish |
| US4791978A (en) * | 1987-11-25 | 1988-12-20 | Vesuvius Crucible Company | Gas permeable stopper rod |
| DE3817580A1 (en) * | 1988-05-24 | 1989-11-30 | Zimmermann & Jansen Gmbh | METHOD FOR POURING A METALLIC MELT, IN PARTICULAR STEEL MELT, FROM A COUPLING PAN |
-
1989
- 1989-05-29 DE DE3917403A patent/DE3917403C2/en not_active Expired - Fee Related
-
1990
- 1990-04-06 EP EP90106625A patent/EP0400302B1/en not_active Expired - Lifetime
- 1990-04-06 DE DE59009459T patent/DE59009459D1/en not_active Expired - Fee Related
- 1990-04-06 ES ES90106625T patent/ES2077601T3/en not_active Expired - Lifetime
- 1990-04-06 AT AT90106625T patent/ATE125740T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| ATE125740T1 (en) | 1995-08-15 |
| EP0400302A2 (en) | 1990-12-05 |
| DE59009459D1 (en) | 1995-09-07 |
| DE3917403A1 (en) | 1990-12-06 |
| ES2077601T3 (en) | 1995-12-01 |
| DE3917403C2 (en) | 1998-02-05 |
| EP0400302A3 (en) | 1992-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0592365B1 (en) | Process and apparatus for controlling the movement of a casting ladle in a casting plant | |
| DE2709727C3 (en) | Device for replacing pouring pipes on pouring vessels during continuous casting | |
| DE3509932C2 (en) | ||
| DE2919880A1 (en) | PIPE | |
| DE69819931T2 (en) | immersion nozzle | |
| DE2631015C3 (en) | Automatic molten metal casting plant | |
| EP0223078B1 (en) | Method of starting a multi-strand continuous-casting installation | |
| DE3448405C2 (en) | ||
| EP0400302B1 (en) | Method of and installation for filling a continuous casting mold with molten metal | |
| EP0444297B1 (en) | Method for starting up automatically a continuous casting installation | |
| DE3049053C2 (en) | Method and device for separating slag and for pouring molten steel from a container | |
| DE19623720B4 (en) | Method and device for controlling the filling quantity during casting, in particular aluminum castings | |
| DE2548585B2 (en) | DEVICE FOR CONTINUOUS STEEL CASTING | |
| DE3332230A1 (en) | Metering device for casting stream seeding | |
| EP0433419B1 (en) | Device for slag-free casting on in continuous casting installations | |
| DE3490299C2 (en) | ||
| DE3321054C1 (en) | Process and apparatus for the prevention of slag inclusions during the continuous casting of steel | |
| DE4332760A1 (en) | Method for the operation of a low-pressure metal-casting apparatus and a low-pressure metal-casting apparatus for this purpose | |
| DE4404148A1 (en) | Process and equipment for continuous casting of metal strands, esp. of steel | |
| DE8233113U1 (en) | FLOAT FOR METAL MELTING | |
| EP1453626B1 (en) | Tundish for production of a metal strip of high purity | |
| DE3802203C2 (en) | ||
| CH624863A5 (en) | Method for preventing the accumulation of oxidic inclusions during the casting of deoxidised steels | |
| DE10130354C1 (en) | Immersion tube used for casting molten metal comprises a tubular section extending from a filling opening for the molten metal, a funnel chamber connected to the tubular section, a removal stream opening, and a collision shoulder | |
| DE2166230A1 (en) | Continuous casting - using closed bottom melt feed funnel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT DE ES FR GB IT NL |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT DE ES FR GB IT NL |
|
| 17P | Request for examination filed |
Effective date: 19920928 |
|
| 17Q | First examination report despatched |
Effective date: 19931115 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT DE ES FR GB IT NL |
|
| REF | Corresponds to: |
Ref document number: 125740 Country of ref document: AT Date of ref document: 19950815 Kind code of ref document: T |
|
| ET | Fr: translation filed | ||
| REF | Corresponds to: |
Ref document number: 59009459 Country of ref document: DE Date of ref document: 19950907 |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19950829 |
|
| ITF | It: translation for a ep patent filed | ||
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2077601 Country of ref document: ES Kind code of ref document: T3 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20001204 |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20020923 Year of fee payment: 13 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20020924 Year of fee payment: 13 Ref country code: ES Payment date: 20020924 Year of fee payment: 13 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20020925 Year of fee payment: 13 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20020926 Year of fee payment: 13 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20020927 Year of fee payment: 13 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030406 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030406 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030407 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031101 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031101 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20030406 |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20031101 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20031231 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20030407 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050406 |