DE3146360C2 - Device for level control of the bath level in a continuous casting mold - Google Patents
Device for level control of the bath level in a continuous casting moldInfo
- Publication number
- DE3146360C2 DE3146360C2 DE19813146360 DE3146360A DE3146360C2 DE 3146360 C2 DE3146360 C2 DE 3146360C2 DE 19813146360 DE19813146360 DE 19813146360 DE 3146360 A DE3146360 A DE 3146360A DE 3146360 C2 DE3146360 C2 DE 3146360C2
- Authority
- DE
- Germany
- Prior art keywords
- rods
- level
- continuous casting
- mold
- casting mold
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- B22D11/186—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by using electric, magnetic, sonic or ultrasonic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Continuous Casting (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Die Erfindung betrifft Verfahren und Vorrichtung zur Regelung der Gießspiegelhöhe in Stranggießkokillen. Die Regelung erfolgt durch Erfassung der Niveauänderungen des Gießspiegels unter Verwendung eines aus den Niveauänderungen resultierenden Meßsignals. Um die Gießspiegelregelung universell für alle Kokillentypen und -abmessungen, insbesondere bei allen zu vergießenden Legierungen aus NE-Metallen, einsetzen zu können, ist nach der Erfindung vorgesehen, daß die Erfassung der Gießspiegeländerung aus der Änderung des elektrischen Widerstandes zweier in die Schmelze tauchenden, elektrisch leitenden Stäbe erfolgt, die aus einem gegen die Schmelze widerstandsfähigen Material bestehen.The invention relates to a method and device for regulating the mold level in continuous casting molds. The regulation takes place by recording the level changes of the meniscus using a measurement signal resulting from the level changes. In order to be able to use the mold level control universally for all mold types and dimensions, in particular for all non-ferrous metal alloys to be cast, the invention provides that the detection of the mold level change from the change in the electrical resistance of two immersed in the melt, electrically Conductive rods made of a material that is resistant to the melt.
Description
Die Erfindung betrifft eine Vorrichtung zur Badspiegel-Höhenregelung in einer Stranggießkokille, wobei mittels zweier von oben in die Metallschmelze ragender, elektrisch leitender Stäbe über eine Widerstandsmessung ein Signal erzeugt wird, das zur Regelung der Metallzufuhr verwendet wird.The invention relates to a device for level control of the bathroom level in a continuous casting mold, whereby by means of two protruding from above into the molten metal, Electrically conductive rods a signal is generated via a resistance measurement, which is used to regulate the Metal feed is used.
Eine Vorrichtung der genannten Art etwa nach der DE-AS 19 38 840 dient zur Ermittlung der Höhenveränderung des steigenden Badspiegels beim Gießen von Metall in eine unten verschlossene Kokille. Wegen der vorzugsweise verwendeten abschmelzenden Stäbe ist diese Vorrichtung nur während des Anfahrvorgangs einsetzbar.A device of the type mentioned, for example according to DE-AS 19 38 840, is used to determine the change in height of the rising bath level when pouring metal into a mold closed at the bottom. Because of the Preferably used consumable rods, this device is only during the start-up process applicable.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung der genannten Art so auszubilden, daß sie für den kontinuierlichen Stranggießbetrieb geeignet ist.The invention is therefore based on the object of designing a device of the type mentioned so that it is suitable for continuous casting.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, « daß die Stäbe aus einem gegen die Schmelze widerstandsfähigem Material mit hohem spezifischem elektrischem Widerstand bestehen.The object is achieved according to the invention in that the rods are made of one against the melt Resistant material with a high specific electrical resistance.
Dabei bewirkt der hohe spezifische Widerstand, daß bei einer Änderung der Badspiegelhöhe eine möglichst große Widerstandsänderung meßbar ist.The high specific resistance has the effect that if there is a change in the height of the bath level, as much as possible large change in resistance is measurable.
Nach einer besonderen Ausführungsform der Erfindung sind die Stäbe an ihrem unteren Ende U-förmig elektrisch leitend verbunden, um einen Widerstandssprung beim Eintauchen der Stäbe in die Schmelze zu vermeiden.According to a particular embodiment of the invention, the rods are U-shaped at their lower end electrically connected to avoid a jump in resistance when the rods are immersed in the melt avoid.
Als Material für die Stäbe wird Chromstahl, Graphit oder Cermet bevorzugt.Chromium steel, graphite or cermet is preferred as the material for the rods.
Zur Halterung der Stäbe und zur Verringerung des Zuleitungswiderstandes empfiehlt es sich, die Stäbe an Stromschienen aus beliebigem, elektrisch leitenden Material zu befestigen. Als Material für die Stromschienen wird Kupfer bevorzugt; soLl der Temperaturkoeffizient des elektrischen Widerstands möglichst gering sein, so werden bevorzugt Konstantan oder Manganin verwendet.To hold the rods and to reduce the lead resistance, it is advisable to use the rods To attach busbars made of any electrically conductive material. As material for the busbars copper is preferred; the temperature coefficient of the electrical resistance should be as low as possible constantan or manganin are preferred.
Die Erfindung wird anhand des folgenden Ausführungsbeispiels näher erläutert Es zeigtThe invention is explained in more detail with reference to the following exemplary embodiment
Fig. 1 Längsschnitt (a) sowie Draufsicht (b) einer Kokille mit zwei Stäben undFig. 1 longitudinal section (a) and plan view (b) of a mold with two rods and
Fig.2 ein Blockschaltbild des Meßsystems und der Regelung.2 shows a block diagram of the measuring system and the regulation.
In F i g. 1 und 2 ist schematisch eine Stranggießkokille 1 mit Schmelze 2 (Badspiegel 2') dargestellt, in die zwei Stäbe 4 aus elektrisch leitendem und gegen die Schmelze 2 widerstandsfähigem Material eintauchen. Die Stäbe 4 weisen einen hohen spezifischen elektrischen Widerstand auf. Länge, Form und Querschnittsfläche der Stäbe 4 können entsprechend den Anforderungen gewählt werden. Als Halterung für die Stäbe 4 und zur Verringerung des Zuleitungswiderstandes dienen Stromschienen 3. Die Stäbe 4 sind über die Stromschienen 3 an eine selbstabgleichende Gleich- oder Weciiselstrom-Widerstandsmeßbrücke 6 angeschlossen, die nach dem Anfahren der Gießanlage automatisch zu Null abgeglichen wird, sobald die Sollhöhe des Badspiegels 2' erreicht ist.In Fig. 1 and 2, a continuous casting mold 1 with melt 2 (bath level 2 ') is shown schematically, in the two Immerse rods 4 made of electrically conductive material resistant to the melt 2. The rods 4 have a high specific electrical resistance. Length, shape and cross-sectional area the bars 4 can be selected according to requirements. As a holder for the rods 4 and busbars 3 are used to reduce the lead resistance. The bars 4 are above the busbars 3 connected to a self-balancing direct or alternating current resistance bridge 6, which is automatically adjusted to zero after starting up the casting system as soon as the target height of the Bad level 2 'is reached.
Eine Änderung der Badspiegelhöhe ergibt am Ausgang der Meßbrücke 6 ein Meßsignal, das in einer Auswerteeinheit 7 verstärkt und bei Verwendung von Wechselstrom demoduliert und gefiltert wird. Das weiterverarbeitete Meßsignal gelangt zu einem Regler 8, der mit Hilfe eines Motors 9 ein Stopfen- oder Schieberventil 5 betätigt und damit die Metallzufuhr aus einem Vorherd 10 in die Stranggießkokille 1 regelt.A change in the height of the bath level results in a measurement signal at the output of the measuring bridge 6, which is in a Evaluation unit 7 is amplified and demodulated and filtered when using alternating current. That further processed measurement signal arrives at a controller 8, which with the help of a motor 9 a plug or Slide valve 5 is actuated and thus regulates the supply of metal from a forehearth 10 into the continuous casting mold 1.
Als Stäbe 4 können beispielsweise Graphit-Rundstäbe mit 10 mm Durchmesser und 150 mm Länge und als Stromschienen 3 solche aus Kupfer mit einem rechteckigen Querschnitt von 20 · 15 mm2 und einer Länge von 90 cm verwendet werden.As rods 4, for example, graphite round rods with a diameter of 10 mm and 150 mm in length, and as busbars 3, those made of copper with a rectangular cross-section of 20 × 15 mm 2 and a length of 90 cm.
Der Widerstand der Kupfer-Schienen 3 beträgt nur 0,1 raQ, derjenige der Graphit-Stäbe 3 dagegen 31 mn, die Widerstandsänderung 2 mß/(cm Badspiegeländerung), die mit einer handelsüblichen Widerstandsmeßbrücke 6 gut meßbar ist.The resistance of the copper rails 3 is only 0.1 raQ, that of the graphite rods 3, however, 31 mn, the change in resistance 2 m / (cm change in bath level), which can be easily measured with a commercially available resistance measuring bridge 6.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (5)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813146360 DE3146360C2 (en) | 1981-11-23 | 1981-11-23 | Device for level control of the bath level in a continuous casting mold |
| GB08230944A GB2109940A (en) | 1981-11-23 | 1982-10-29 | Method and apparatus for controlling the liquid metal level in a continuous casting mould |
| FR8219460A FR2516822B1 (en) | 1981-11-23 | 1982-11-19 | METHOD AND DEVICE FOR REGULATING THE HEIGHT OF THE CASTING LEVEL IN CONTINUOUS CASTING SHELLS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813146360 DE3146360C2 (en) | 1981-11-23 | 1981-11-23 | Device for level control of the bath level in a continuous casting mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3146360A1 DE3146360A1 (en) | 1983-06-01 |
| DE3146360C2 true DE3146360C2 (en) | 1983-10-27 |
Family
ID=6146993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19813146360 Expired DE3146360C2 (en) | 1981-11-23 | 1981-11-23 | Device for level control of the bath level in a continuous casting mold |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE3146360C2 (en) |
| FR (1) | FR2516822B1 (en) |
| GB (1) | GB2109940A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106670440A (en) * | 2016-12-30 | 2017-05-17 | 北京航空航天大学 | Movable probe speed measuring method and device for vacuum speed adjustment pouring process |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02205234A (en) * | 1989-02-02 | 1990-08-15 | Nippon Kinzoku Kogyo Kk | Method for detecting molten metal surface level in cast strip continuous casting |
| CN105057609B (en) * | 2015-09-22 | 2017-11-14 | 武汉钢铁有限公司 | The control method of Baogang's water level in continuous casting |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1105568B (en) * | 1956-03-07 | 1961-04-27 | Ver Leichtmetallwerke Gmbh | Process for the automatic control of the metal supply during continuous casting of metals |
| DE1184905B (en) * | 1962-04-19 | 1965-01-07 | Boehler & Co Ag Geb | Device for controlling the melt flow when pouring into a mold in continuous casting plants |
| FR1463902A (en) * | 1965-10-05 | 1966-07-22 | Siderurgie Fse Inst Rech | Adjustment of a flow rate of liquid metal flowing through an orifice |
| ES448358A1 (en) * | 1975-07-17 | 1977-07-16 | Gerdts Gustav F Kg | Probe for measuring liquid levels |
| JPS5376926A (en) * | 1976-12-21 | 1978-07-07 | Nippon Kokan Kk | Molten metal level monitor controller of continuous casting machine that use eddy flow system range finder for measurement of molten metal level |
| DE2747479C2 (en) * | 1977-10-22 | 1983-12-15 | Kernforschungsanlage Jülich GmbH, 5170 Jülich | Device for electrically measuring the height of electrically conductive liquids |
| DE2951097C2 (en) * | 1979-12-19 | 1982-07-22 | Wieland-Werke Ag, 7900 Ulm | Method and device for controlling the mold level in continuous casting molds |
-
1981
- 1981-11-23 DE DE19813146360 patent/DE3146360C2/en not_active Expired
-
1982
- 1982-10-29 GB GB08230944A patent/GB2109940A/en not_active Withdrawn
- 1982-11-19 FR FR8219460A patent/FR2516822B1/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106670440A (en) * | 2016-12-30 | 2017-05-17 | 北京航空航天大学 | Movable probe speed measuring method and device for vacuum speed adjustment pouring process |
| CN106670440B (en) * | 2016-12-30 | 2017-11-24 | 北京航空航天大学 | The traveling probe speed-measuring method and device of a kind of vacuum speed governing casting process |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2516822A1 (en) | 1983-05-27 |
| FR2516822B1 (en) | 1986-12-19 |
| GB2109940A (en) | 1983-06-08 |
| DE3146360A1 (en) | 1983-06-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8125 | Change of the main classification |
Ipc: B22D 11/16 |
|
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |