EP2061612B1 - Method for pouring melt from a tiltable metallurgic vessel and system for performing the method - Google Patents

Method for pouring melt from a tiltable metallurgic vessel and system for performing the method Download PDF

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Publication number
EP2061612B1
EP2061612B1 EP07785864A EP07785864A EP2061612B1 EP 2061612 B1 EP2061612 B1 EP 2061612B1 EP 07785864 A EP07785864 A EP 07785864A EP 07785864 A EP07785864 A EP 07785864A EP 2061612 B1 EP2061612 B1 EP 2061612B1
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EP
European Patent Office
Prior art keywords
steelworks converter
slag
converter
melt
tilting
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.)
Revoked
Application number
EP07785864A
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German (de)
French (fr)
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EP2061612A1 (en
Inventor
Johann Fleischanderl
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SIEMENS VAI METALS Technologies GmbH
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SIEMENS VAI METALS TECHNOLOGIES GmbH
Siemens VAI Metals Technologies GmbH Austria
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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
    • B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4673—Measuring and sampling devices
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/50—Tilting mechanisms for converters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/28—Arrangement of controlling, monitoring, alarm or the like devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/0028—Devices for monitoring the level of the melt
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/02—Observation or illuminating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag

Definitions

  • the invention relates to a method for pouring melt, in particular slag and / or molten steel, from a tiltable metallurgical vessel, in particular a steelworks converter, into a receptacle, in particular a pan or a slag bucket, and a system for automatically carrying out the method.
  • a method of this kind is known from WO 03/004198 A2 known.
  • molten steel is poured into a receiving vessel positioned below a tap hole of a steelworks converter, taking into account numerous parameters relevant to tapping, such as the tilt angle of the steelworks converter, the bricking state of the taphole, the bricking state of the steelworks converter, the batch volume, the tapping time, chemical compositions of the steel and the slag, the temperature of the same, etc., and wherein the tilt angle of the steelworks converter is adjusted in dependence of these parameters.
  • the receptacle is located vertically below the tap hole of the converter. The Schmelzenbadspiegel the converter and the receptacle are constantly observed.
  • the object of the invention is to further develop a method of the type described above in that the casting can be carried out completely automatically, wherein a casting stream which changes during the progressive tilting of the metallurgical vessel optimally passes into the receiving vessel.
  • the height of the bath level in the metallurgical vessel can be determined directly or indirectly; directly by a BadLitemess worn and indirectly in that prior to the determination of the tilt position, the height of the bath level in the metallurgical vessel is determined by calculating the inner volume of the metallurgical vessel and the weight of the melt or the melts, in the latter case preferably before filling the metallurgical vessel the internal volume of the metallurgical vessel is measured by means of a laser scanner.
  • the angle between a measuring beam of the measuring device and the bath level and the distance of the bath level are measured by the measuring device.
  • a method for tapping steel from a steelworks converter is characterized in that, for casting steel melt from a steelworks converter, the bath level of the slag melt is determined, the tilting position of the metallurgical vessel for casting off the molten steel taking into account the bath level of the molten steel Slag melt is determined such that the bath level of the slag melt for the tilt position of the steelworks converter when tapping the molten steel is located at a safe distance from the converter mouth of the steelworks converter.
  • the metallurgical vessel is continuously tilted during the pouring of melt.
  • the metallurgical vessel can also be tilted stepwise to avoid overheating of the drive motors.
  • a feed chute is provided, which is tracked according to the casting stream and / or the receiving receptacle changing as a function of the tilting angle of the metallurgical vessel changing as casting progresses.
  • an addition chute is provided, which is provided with a position measuring device for measuring the position and an associated control for Positioning the Zugabeschurre depending on the position of the pouring stream and / or the position of the receiving vessel is equipped.
  • a weighing device for the receptacle is provided.
  • FIGS. 1 to 4 show a schematic representation of different tilting positions of a Stahlwerkkonverters during casting of molten steel and the subsequent casting of slag melt.
  • a steelworks converter 1 is mounted in a conventional manner in a support ring 2, which support ring 2 via two diametrically opposed and a rotation axis 3 defining trunnion 4 is tiltable in bearings arranged on the foundation, by means of an electric drive, not shown.
  • a ladle carriage 5 for receiving molten steel 6 in a pan 7 and further also a slag 8 for receiving slag melt 9 in a slag bucket 10 in the symmetry tilt plane of the steelworks converter 1 movable, and also in each case by means of an electric drive ,
  • a melt bath level measuring device 11 On the side of the steel plant converter 1, a melt bath level measuring device 11 provided with a cooling device is provided, likewise in the symmetry tilting plane. With this measuring device 11, the interior of the Stahlwerkskonverters 1 anvinstrument, and it is the Schmelzenbadaptproof love 12, as soon as the converter mouth 13 of the Stahlwerkskonverters 1 is directed against the measuring device 11 when tilting the Stahlwerkskonverters 1, by measuring the angle 14 between a Measuring beam 15 of the measuring device 11 and the bath mirror 16 and the removal of the bath mirror 16 of the measuring device 11.
  • the measuring device 11 may, for example, by means of a laser beam or radar work.
  • the tilting position of the steelworks converter 1 can be determined by means of a position measuring device which is usually present in steel mills. Likewise, the positions of the receptacles that can be moved below the steel mill converter, ie the ladle 7 and the slag bucket 10, are likewise shown by means of conventional, not shown, Position measuring devices detectable. Both the tilt drive of the Stahlwerkskonverter 1 as well as the traction drive of the ladle truck 5 and also the slag carriage 8 are equipped with controls for accurate positioning.
  • the current state of the bath mirror 16 can be calculated as a function of the tilt angle of the steelworks converter 1 also on the basis of the current converter geometry (here the bricking state is meant) and the batch size.
  • the current amount of the cast-off molten steel 6 is continuously detected by means of weighing devices for weighing the total weight of the receptacles 7 during tapping.
  • the current level of the bath level 16 can thus be continuously calculated.
  • the automatic pouring process is as follows: It is started by the operator.
  • the steelworks converter 1 is automatically tilted towards pouring molten steel 6, wherein the current level of the bath 16 is continuously detected, in one of the two methods described above either from the distance of the bath level 16 of the measuring device 11 and from the angle 14, the Badador 16 with the measuring beam 15 of the measuring device 11 includes, or by Volums- and weight measurements.
  • a maximum possible bath level 16 results from the lowest edge 13 'of the converter mouth 13.
  • a table with the data for the maximum bath level 16 as a function of the tilt angle of the steel mill converter 1 is stored in the control system and can be adapted to the installation in the course of commissioning.
  • the maximum possible bath level is reduced by an adjustable value and given to the pouring control as the desired bath level. In other words, a safety distance of the bath level 16 from the deepest edge 13 'of the converter mouth 13 is maintained.
  • the tilting position of the steel mill converter 1, in which steel molten steel 6 to be discharged from the tap hole 17 in the form of a pouring stream 18, is calculated. This results in a certain position of the resulting from the festgestllten tilting pouring stream 18, which position causes the positioning of Aufnahnmegefäßes 7 for receiving the molten steel 6, namely computer controlled. Then the steelworks converter 1 is tilted in the position Abstichbeginn (see. Fig. 1 ), the tilt angle is 51 ° in the illustrated embodiment.
  • the tap hole 17 is closed, for example with a closure device with a closure body, which can be brought from a waiting position to a closed position, as shown in the EP 1 054 068 A2 is described.
  • the relationship between the tilt angle of the steel mill converter 1 and the position of the pouring stream 18 or the position of the ladle carriage 5 is permanently stored in the automation system and is adapted to the installation.
  • 5 additive can be introduced into the pan 7 by means of a Zugabeschurre 19 as a function of the converter tilt angle of the steel mill converter 1 and in dependence on the position of the ladder carriage.
  • the position of the addition chute 19 is also detected by means of a continuous position measuring system and automatically positioned according to the position of the receiving vessel 7.
  • the addition of aggregate is started either automatically or by the operator.
  • the steelworks converter 1 is now continuously or stepwise tipped according to the scheme deposited in the automation system until residual steel is detected by the slag detection system or the maximum pouring tilt angle (cf. Fig. 4 , Tilt angle - 150 °) is achieved. After reaching the maximum tilt angle or residual steel detection, the steelworks converter is automatically raised again.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

A method for pouring melt (9, 6) from a tiltable vessel (1) into a receiving vessel (7) is characterized for obtaining an optimum and automated pouring process by the combination of the following features: - determining the tilt position of the metallurgic vessel (1), in which the melt (6) to be poured from the metallurgic vessel (1) exits in the form of a poured stream (18), - determining the position of the poured stream (18) resulting from the determined tilt position of the metallurgic vessel (1), bringing into position the receiving vessel (7) for receiving the poured stream (18) from the metallurgic vessel (1) according to the determined tilt position, and after the beginning of the pouring - tracking of the receiving vessel (7) according to the poured stream (18) changing with the changing tilt angle of the metallurgic vessel (1) as a function of the progressing pouring process.

Description

Die Erfindung betrifft ein Verfahren zum Abgießen von Schmelze, insbesondere Schlackenund/oder Stahlschmelze, aus einem kippbaren metallurgischen Gefäß, insbesondere einem Stahlwerkskonverter, in ein Aufnahmegefäß, insbesondere eine Pfanne oder einen Schlackenkübel, sowie eine Anlage zur automatischen Durchführung des Verfahrens.The invention relates to a method for pouring melt, in particular slag and / or molten steel, from a tiltable metallurgical vessel, in particular a steelworks converter, into a receptacle, in particular a pan or a slag bucket, and a system for automatically carrying out the method.

Ein Verfahren dieser Art ist aus der WO 03/004198 A2 bekannt. Hierbei wird in ein unterhalb eines Abstichloches eines Stahlwerkskonverters in Stellung gebrachtes Aufnahmegefäß Stahlschmelze abgegossen, wobei zahlreiche für den Abstich relevante Parameter berücksichtigt werden, wie beispielsweise der Kippwinkel des Stahlwerkskonverters, der Ausmauerungszustand des Abstichloches, der Ausmauerungszustand des Stahlwerkskonverters, das Chargenvolumen, die Abstichzeit, die chemischen Zusammensetzungen des Stahles und der Schlacke, die Temperatur derselben, etc., und wobei der Kippwinkel des Stahlwerkskonverters in Abhängigkeit dieser Parameter eingestellt wird. Unabhängig davon befindet sich das Aufnahmegefäß senkrecht unterhalb des Abstichloches des Konverters. Die Schmelzenbadspiegel des Konverters und des Aufnahmegefäßes werden ständig beobachtet.A method of this kind is known from WO 03/004198 A2 known. In this case, molten steel is poured into a receiving vessel positioned below a tap hole of a steelworks converter, taking into account numerous parameters relevant to tapping, such as the tilt angle of the steelworks converter, the bricking state of the taphole, the bricking state of the steelworks converter, the batch volume, the tapping time, chemical compositions of the steel and the slag, the temperature of the same, etc., and wherein the tilt angle of the steelworks converter is adjusted in dependence of these parameters. Regardless, the receptacle is located vertically below the tap hole of the converter. The Schmelzenbadspiegel the converter and the receptacle are constantly observed.

Zum Abgießen von Schmelzen in eine Gießform ist es bekannt ( DE 26 31 015 A1 ), den Kippwinkel einer kippbaren Gießpfanne in Abhängigkeit von der Position der Gießform einzustellen, wobei der Gießstrahl aus dem Mund der Gießpfanne austritt und stets seine Position, d.h. seine Lage im Raum, beibehält. Die Gießform ist mit einer Schmelzenspiegelmesseinrichtung ausgestattet, sodass ein Überfließen der Gießform vermieden werden kann.For pouring melts into a casting mold, it is known ( DE 26 31 015 A1 ) to adjust the tilt angle of a tiltable ladle depending on the position of the mold, wherein the pouring stream exits from the mouth of the ladle and always maintains its position, ie its position in space. The mold is equipped with a melt level gauge, so that overflow of the mold can be avoided.

Aus der EP 0 240 128 B1 ist eine Gießmaschine mit einem induktiv beheizbaren kippbaren Schmelzenofen bekannt, wobei der Schmelzenofen kippbar ist und eine in die Schmelze einlangende und die Schmelze aufnehmende Gießform zwecks Konstanthaltung des Eintauchgrades und damit des Füllgrades der Gießform in Abhängigkeit der Höhe des Schmelzenbadspiegels in die Schmelze eintauchbar bzw. der Kippwinkel des Schmelzenofens änderbar ist.From the EP 0 240 128 B1 a casting machine with an inductively heatable tiltable furnace furnace is known, wherein the furnace is tiltable and a melt in the incoming and receiving the melt mold to keep constant the degree of immersion and thus the degree of filling of the mold depending on the height of Schmelzenbadspiegels submerged in the melt or Tilt angle of the melting furnace is changeable.

Aus der DE 35 32 763 A1 ist es bekannt, aus einer kippbaren Gießpfanne Schmelze in eine unmittelbar zur Gießpfanne in Stellung gebrachte Gießform abzugießen, wobei der Schmelzenbadspiegel in der Gießform beobachtet wird und in Abhängigkeit davon der Kippwinkel der Gießpfanne gesteuert wird. Eine ähnlich ausgeführte Gießmaschine ist aus der DE 12 35 520 A1 bekannt.From the DE 35 32 763 A1 It is known to pour melt from a tiltable ladle into a mold placed directly in the casting ladle, wherein the Schmelzenbadspiegel is observed in the mold and depending on the Tipping angle of the ladle is controlled. A similarly executed casting machine is from the DE 12 35 520 A1 known.

Die Erfindung stellt sich die Aufgabe, ein Verfahren der eingangs beschriebenen Art dahingehend weiterzuentwickeln, dass das Abgießen vollkommen automatisiert durchgeführt werden kann, wobei ein sich während des fortschreitenden Kippens des metallurgischen Gefäßes ändernder Gießstrahl optimal in das Aufnahmegefäß gelangt.The object of the invention is to further develop a method of the type described above in that the casting can be carried out completely automatically, wherein a casting stream which changes during the progressive tilting of the metallurgical vessel optimally passes into the receiving vessel.

Diese Aufgabe wird erfindungsgemäß durch die Kombination folgender Merkmale gelöst:

  • Feststellen der Kippposition des metallurgischen Gefäßes, in der die abzugießende Schmelze aus dem metallurgischen Gefäß in Form eines Gießstrahls austritt,
  • Ermitteln der Lage des sich aus der festgestellten Kippposition des metallurgischen Gefäßes ergebenden Gießstrahls,
  • Inpositionbringen des Aufnahmegefäßes zum Aufnehmen des aus dem metallurgischen Gefäß entsprechend der festgestellten Kippposition sich ergebenden Gießstrahls und nach Beginn des Abgießens,
  • Nachführen des Aufnahmegefäßes entsprechend dem sich in Abhängigkeit des sich mit fortschreitendem Abgießen ändernden Kippwinkels des metallurgischen Gefäßes ändernden Gießstrahl.
This object is achieved according to the invention by the combination of the following features:
  • Determining the tilting position of the metallurgical vessel in which the melt to be cast emerges from the metallurgical vessel in the form of a pouring stream,
  • Determining the position of the pouring stream resulting from the determined tilting position of the metallurgical vessel,
  • Placing the receptacle in position to receive the pouring stream resulting from the metallurgical vessel in accordance with the detected tilting position and after the start of pouring,
  • Tracking the receiving vessel according to the changing in dependence on the changing with advancing tilting angle of the metallurgical vessel casting stream.

Die Höhe des Badspiegels im metallurgischen Gefäß kann direkt oder indirekt bestimmt werden; direkt durch eine Badspiegelmesseinrichtung und indirekt dadurch, dass vor dem Feststellen der Kippposition die Höhe des Badspiegels im metallurgischen Gefäß festgestellt wird durch Errechnen aufgrund des Innenvolumens des metallurgischen Gefäßes und des Gewichts der Schmelze bzw. der Schmelzen, wobei im letzteren Fall vorzugsweise vor dem Füllen des metallurgischen Gefäßes das Innenvolumen des metallurgischen Gefäßes mittels eines Laserscanners vermessen wird.The height of the bath level in the metallurgical vessel can be determined directly or indirectly; directly by a Badspiegelmesseinrichtung and indirectly in that prior to the determination of the tilt position, the height of the bath level in the metallurgical vessel is determined by calculating the inner volume of the metallurgical vessel and the weight of the melt or the melts, in the latter case preferably before filling the metallurgical vessel the internal volume of the metallurgical vessel is measured by means of a laser scanner.

Erfolgt das Messen des Badspiegels im metallurgischen Gefäß mittels einer Badspiegelmesseinrichtung, werden der Winkel zwischen einem Messstrahl der Messeinrichtung und dem Badspiegel und die Entfernung des Badspiegels von der Messeinrichtung vermessen.If the measuring of the bath level in the metallurgical vessel by means of a Badspiegelmesseinrichtung, the angle between a measuring beam of the measuring device and the bath level and the distance of the bath level are measured by the measuring device.

Ein Verfahren zum Abstich von Stahl aus einem Stahlwerkskonverter ist dadurch gekennzeichnet, dass zum Abgießen von Stahlschmelze aus einem Stahlwerkskonverter der Badspiegel der Schlackenschmelze eruiert wird, wobei die Kippposition des metallurgischen Gefäßes zum Abgießen der Stahlschmelze unter Berücksichtigung des Badspiegels der Schlackenschmelze derart bestimmt wird, dass der Badspiegel der Schlackenschmelze für die Kippposition des Stahlwerkskonverters beim Abstich der Stahlschmelze sich in einem Sicherheitsabstand vom Konvertermund des Stahlwerkskonverters befindet.A method for tapping steel from a steelworks converter is characterized in that, for casting steel melt from a steelworks converter, the bath level of the slag melt is determined, the tilting position of the metallurgical vessel for casting off the molten steel taking into account the bath level of the molten steel Slag melt is determined such that the bath level of the slag melt for the tilt position of the steelworks converter when tapping the molten steel is located at a safe distance from the converter mouth of the steelworks converter.

Vorzugsweise wird das metallurgische Gefäß während des Abgießens von Schmelze kontinuierlich gekippt.Preferably, the metallurgical vessel is continuously tilted during the pouring of melt.

Erfolgt das Kippen des metallurgischen Gefäßes sehr langsam, kann zur Vermeidung eines Überhitzens der Antriebsmotoren das metallurgische Gefäß auch schrittweise gekippt werden.If the tilting of the metallurgical vessel takes place very slowly, the metallurgical vessel can also be tilted stepwise to avoid overheating of the drive motors.

Die einzelnen durchzuführenden Schritte beim Abgießen werden zweckmäßig automatisiert mit Hilfe einer Computersteuerung durchgeführt, ebenso das Aufrichten des metallurgischen Gefäßes nach dem Aufgießen.The individual steps to be performed during casting are expediently carried out automatically with the aid of a computer control, as well as the erection of the metallurgical vessel after pouring.

Für die Zugabe eines Zuschlagstoffes in das Aufnahmegefäß ist eine Zugabeschurre vorgesehen, die entsprechend dem sich in Abhängigkeit des sich mit fortschreitendem Abgießen ändernden Kippwinkels des metallurgischen Gefäßes ändernden Gießstrahl und/oder dem nachgeführten Aufnahmegefäß nachgeführt wird.For the addition of an additive into the receptacle, a feed chute is provided, which is tracked according to the casting stream and / or the receiving receptacle changing as a function of the tilting angle of the metallurgical vessel changing as casting progresses.

Eine Anlage zur Durchführung des erfindungsgemäßen Verfahrens ist gekennzeichnet durch die Kombination folgender Merkamale:

  • ein metallurgisches Gefäß, ausgestattet mit einer Positionsmesseinrichtung zum Messen des Kippwinkels und einer zugehörigen Steuerung zum Kippen des metallurgischen Gefäßes,
  • ein Aufnahmegefäß, fahrbar in Richtung der Kippebene des metallurgischen Gefäßes, mit einer Positionsmesseinrichtung und einer zugehörigen Steuerung zum Verfahren des Aufnahmegefäßes,
  • eine Messeinrichtung zur direkten oder indirekten, vorzugsweise kontinuierlichen Erfassung des Badspiegels der Schmelze in dem metallurgischen Gefäß, sowie gegebenenfalls durch eine
  • Einrichtung zur Erkennung von Abstichende, Beginn Schlackenabstich und Reststahl.
An installation for carrying out the method according to the invention is characterized by the combination of the following features:
  • a metallurgical vessel equipped with a position measuring device for measuring the tilt angle and an associated control for tilting the metallurgical vessel,
  • a receiving vessel, movable in the direction of the tilting plane of the metallurgical vessel, with a position-measuring device and an associated control for moving the receiving vessel,
  • a measuring device for direct or indirect, preferably continuous detection of the bath level of the melt in the metallurgical vessel, and optionally by a
  • Device for detecting tappers, beginning slag tapping and residual steel.

Für die Zugabe eines Zuschlagstoffes ist eine Zugabeschurre vorgesehen, die mit einer Positionsmesseinrichtung zum Messen der Position und einer zugehörigen Steuerung zum Positionieren der Zugabeschurre in Abhängigkeit der Lage des Gießstrahles und/oder der Lage des Aufnahmegefäßes ausgestattet ist.For the addition of an aggregate, an addition chute is provided, which is provided with a position measuring device for measuring the position and an associated control for Positioning the Zugabeschurre depending on the position of the pouring stream and / or the position of the receiving vessel is equipped.

Erfolgt die Erfassung des Badspiegels indirekt, ist eine Wägeeinrichtung für das Aufnahmegefäß vorgesehen.If the detection of the bath level indirectly, a weighing device for the receptacle is provided.

Die Erfindung ist nachfolgend anhand eines Ausführungsbeispiels, das in der Zeichnung dargestellt ist, näher erläutert. Die Figuren 1 bis 4 zeigen in schematischer Darstellung unterschiedliche Kipppositionen eines Stahlwerkkonverters beim Abgießen von Stahlschmelze und beim nachfolgenden Abgießen von Schlackenschmelze.The invention is explained in more detail with reference to an embodiment which is illustrated in the drawing. The FIGS. 1 to 4 show a schematic representation of different tilting positions of a Stahlwerkkonverters during casting of molten steel and the subsequent casting of slag melt.

Ein Stahlwerkskonverter 1 ist in üblicher Weise in einem Tragring 2 befestigt, welcher Tragring 2 über zwei diametral einander gegenüberliegende und eine Drehachse 3 definierende Tragzapfen 4 in am Fundament angeordneten Lagern kippbar ist, und zwar mittels eines nicht näher dargestellten elektrischen Antriebs.A steelworks converter 1 is mounted in a conventional manner in a support ring 2, which support ring 2 via two diametrically opposed and a rotation axis 3 defining trunnion 4 is tiltable in bearings arranged on the foundation, by means of an electric drive, not shown.

Unterhalb des Stahlwerkskonverters 1 ist ein Pfannenwagen 5 zur Aufnahme von Stahlschmelze 6 in eine Pfanne 7 und weiters auch ein Schlackenwagen 8 zur Aufnahme von Schlackenschmelze 9 in einen Schlackenkübel 10 in der Symmetrie-Kippebene des Stahlwerkskonverters 1 verfahrbar, und zwar ebenfalls jeweils mittels eines elektrischen Antriebs.Below the Stahlwerkskonverters 1 is a ladle carriage 5 for receiving molten steel 6 in a pan 7 and further also a slag 8 for receiving slag melt 9 in a slag bucket 10 in the symmetry tilt plane of the steelworks converter 1 movable, and also in each case by means of an electric drive ,

Seitlich des Stahlwerkskonverters 1 ist eine mit einer Kühlung versehene Schmelzenbadspiegel-Messeinrichtung 11 vorgesehen, und zwar ebenfalls in der Symmetrie-Kippebene. Mit dieser Messeinrichtung 11 wird das Innere des Stahlwerkskonverters 1 anvisiert, und es lässt sich die Schmelzenbadspiegelhöhe 12, sobald beim Kippen des Stahlwerkskonverters 1 der Konvertermund 13 des Stahlwerkskonverters 1 gegen die Messeinrichtung 11 gerichtet ist, ermitteln, und zwar durch Messen des Winkels 14 zwischen einem Messstrahl 15 der Messeinrichtung 11 und dem Badspiegel 16 und der Entfernung des Badspiegels 16 von der Messeinrichtung 11. Die Messeinrichtung 11 kann beispielsweise mittels eines Laserstrahls oder auch mittels Radar arbeiten.On the side of the steel plant converter 1, a melt bath level measuring device 11 provided with a cooling device is provided, likewise in the symmetry tilting plane. With this measuring device 11, the interior of the Stahlwerkskonverters 1 anvisiert, and it is the Schmelzenbadspiegelhöhe 12, as soon as the converter mouth 13 of the Stahlwerkskonverters 1 is directed against the measuring device 11 when tilting the Stahlwerkskonverters 1, by measuring the angle 14 between a Measuring beam 15 of the measuring device 11 and the bath mirror 16 and the removal of the bath mirror 16 of the measuring device 11. The measuring device 11 may, for example, by means of a laser beam or radar work.

Die Kippposition des Stahlwerkskonverters 1 ist mittels einer in Stahlwerken üblich vorhandenen Positionsmesseinrichtung feststellbar. Desgleichen sind auch die Positionen der unterhalb des Stahlwerkskonverters verfahrbaren Aufnahmegefäße, also der Pfanne 7 sowie des Schlackenkübels 10, mittels üblicher, nicht näher dargestellter,
Positionsmesseinrichtungen feststellbar. Sowohl der Kippantrieb des Stahlwerkskonverters 1 als auch der Fahrantrieb des Pfannenwagens 5 und auch des Schlackenwagens 8 sind mit Steuerungen zum genauen Positionieren ausgestattet.The tilting position of the steelworks converter 1 can be determined by means of a position measuring device which is usually present in steel mills. Likewise, the positions of the receptacles that can be moved below the steel mill converter, ie the ladle 7 and the slag bucket 10, are likewise shown by means of conventional, not shown,
Position measuring devices detectable. Both the tilt drive of the Stahlwerkskonverter 1 as well as the traction drive of the ladle truck 5 and also the slag carriage 8 are equipped with controls for accurate positioning.

Anstelle der Messeinrichtung 11 kann der aktuelle Stand des Badspiegels 16 in Abhängigkeit des Kippwinkels des Stahlwerkskonverter 1 auch auf Basis der aktuellen Konvertergeometrie (hier ist der Ausmauerungszustand gemeint) und der Chargengröße errechnet werden. Hierfür wird während des Abstichs laufend die aktuelle Menge der abgegossenen Stahlschmelze 6 mittels Wägeeinrichtungen zum Abwägen des Gesamtgewichtes der Aufnahmegefäße 7 erfasst. Auf Basis des errechneten Konverterinhalts und der gegebenen Konvertergeometrie kann somit laufend der aktuelle Stand des Badspiegels 16 errechnet werden.Instead of the measuring device 11, the current state of the bath mirror 16 can be calculated as a function of the tilt angle of the steelworks converter 1 also on the basis of the current converter geometry (here the bricking state is meant) and the batch size. For this purpose, the current amount of the cast-off molten steel 6 is continuously detected by means of weighing devices for weighing the total weight of the receptacles 7 during tapping. On the basis of the calculated converter content and the given converter geometry, the current level of the bath level 16 can thus be continuously calculated.

Der automatische Abgießvorgang läuft wie folgt ab: Er wird vom Operator gestartet. Der Stahlwerkskonverter 1 wird automatisch in Richtung Abgießen von Stahlschmelze 6 gekippt, wobei kontinuierlich der aktuelle Badspiegel 16 erfasst wird, und zwar nach einer der beiden oben beschriebenen Methoden entweder aus der Entfernung des Badspiegels 16 von der Messeinrichtung 11 und aus dem Winkel 14, den der Badspiegel 16 mit dem Messstrahl 15 der Messeinrichtung 11 einschließt, oder durch Volums- und Gewichtsmessungen.The automatic pouring process is as follows: It is started by the operator. The steelworks converter 1 is automatically tilted towards pouring molten steel 6, wherein the current level of the bath 16 is continuously detected, in one of the two methods described above either from the distance of the bath level 16 of the measuring device 11 and from the angle 14, the Badspiegel 16 with the measuring beam 15 of the measuring device 11 includes, or by Volums- and weight measurements.

Ein maximal möglicher Badspiegel 16 ergibt sich durch die tiefste Kante 13' des Konvertermundes 13. Eine Tabelle mit den Daten für den maximalen Badspiegel 16 in Anhängigkeit des Kippwinkels des Stahlwerkskonverters 1 ist im Steuerungssystem hinterlegt und kann im Zuge der IBN anlagenspezifisch angepasst werden. Um ein Auskippen von Schmelze über den Konvertermund 13 zu vermeiden, wird der maximal mögliche Badspiegel um einen einstellbaren Wert reduziert und der Abgießregelung als Badspiegelsollwert vorgegeben. Das heißt mit anderen Worten: es wird ein Sicherheitsabstand des Badspiegels 16 von der tiefsten Kante 13' des Konvertermundes 13 eingehalten.A maximum possible bath level 16 results from the lowest edge 13 'of the converter mouth 13. A table with the data for the maximum bath level 16 as a function of the tilt angle of the steel mill converter 1 is stored in the control system and can be adapted to the installation in the course of commissioning. In order to prevent the melt from tipping over the converter mouth 13, the maximum possible bath level is reduced by an adjustable value and given to the pouring control as the desired bath level. In other words, a safety distance of the bath level 16 from the deepest edge 13 'of the converter mouth 13 is maintained.

Aus den aktuellen Daten wird die Kippposition des Stahlwerkskonverters 1, in der abzugießende Stahlschmelze 6 aus dem Stichloch 17 in Form eines Gießstrahls 18 austritt, errechnet. Daraus ergibt sich eine bestimmte Lage des sich aus der festgestllten Kippposition ergebenden Gießstrahls 18, welche Lage das Inpositionbringen des Aufnahnmegefäßes 7 zum Aufnehmen der Stahlschmelze 6 veranlasst, und zwar computergesteuert. Sodann wird der Stahlwerkskonverter 1 in die Position Abstichbeginn gekippt (vgl. Fig. 1), der Kippwinkel liegt beim dargestellten Ausführungsbeispiel bei 51°.From the current data, the tilting position of the steel mill converter 1, in which steel molten steel 6 to be discharged from the tap hole 17 in the form of a pouring stream 18, is calculated. This results in a certain position of the resulting from the festgestllten tilting pouring stream 18, which position causes the positioning of Aufnahnmegefäßes 7 for receiving the molten steel 6, namely computer controlled. Then the steelworks converter 1 is tilted in the position Abstichbeginn (see. Fig. 1 ), the tilt angle is 51 ° in the illustrated embodiment.

Zum kontinuierlichen Abgießen der Stahlschmelze 6 wird der Stahlwerkskonverter 1 sodann computergesteuert weitergekippt und das Aufnahmegefäß, d.h. die Pfanne 7, wird entsprechend dem sich ändernden Gießstrahl 18 computergesteuert nachgeführt, wobei die Lage des Gießstrahls 18 entsprechend dem Kippwinkel des Stahlwerkskonverters 1 ebenfalls computergesteuert errechnet wird, und zwar solange, bis das Abgießen der Stahlschmelze 6 beendet ist. Dies ist beim dargestellten Ausführungsbeispiel in Fig. 2 veranschaulicht, der Kippwinkel des Stahlwerkskonverters beträgt 96,7°.For continuous casting of the molten steel 6 of the steelworks converter 1 is then further tilted computer controlled and the receptacle, ie the pan 7, computerized tracked according to the changing pouring stream 18, wherein the position of the pouring stream 18 is calculated according to the tilt angle of the steelworks converter 1 also computer controlled, and although until the pouring of molten steel 6 is completed. This is in the illustrated embodiment in Fig. 2 illustrates, the tilt angle of the steelworks converter is 96.7 °.

Zum Ende des Abgießens der Stahlschmelze 6 wird das Stichloch 17 verschlossen, beispielweise mit einer Verschlusseinrichtung mit einem Verschlusskörper, der von einer Warteposition in eine Schließposition gebracht werden kann, wie dies in der EP 1 054 068 A2 beschrieben ist.At the end of pouring the molten steel 6, the tap hole 17 is closed, for example with a closure device with a closure body, which can be brought from a waiting position to a closed position, as shown in the EP 1 054 068 A2 is described.

Der Zusammenhang zwischen Kippwinkel des Stahlwerkskonverters 1 und Lage des Gießstrahles 18 bzw. Lage des Pfannenwagens 5 ist fix im Automatisierungssystem hinterlegt und wird anlagenspezifisch angepasst.The relationship between the tilt angle of the steel mill converter 1 and the position of the pouring stream 18 or the position of the ladle carriage 5 is permanently stored in the automation system and is adapted to the installation.

Während des Abgießens des Stahlschmelze 6 kann mittels einer Zugabeschurre 19 in Abhängigkeit des Konverterkippwinkels des Stahlwerkskonverters 1 bzw. in Abhängigkeit der Position des Pfannenwagens 5 Zuschlagstoff in die Pfanne 7 eingebracht werden. Die Position der Zugabeschurre 19 wird ebenfalls mittels eines kontinuierlichen Positionsmesssystems erfasst und entsprechend der Position des Aufnahmegefäßes 7 automatisch positioniert. Der Start der Zugabe von Zuschlagstoffen erfolgt entweder automatisch oder durch den Operator.During the pouring of the molten steel 6, 5 additive can be introduced into the pan 7 by means of a Zugabeschurre 19 as a function of the converter tilt angle of the steel mill converter 1 and in dependence on the position of the ladder carriage. The position of the addition chute 19 is also detected by means of a continuous position measuring system and automatically positioned according to the position of the receiving vessel 7. The addition of aggregate is started either automatically or by the operator.

Anschließend erfolgt das Abgießen der Schlackenschmelze 9 über den Konvertermund 13, und zwar ebenfalls automatisch. Es wird vom Operator gestartet, wonach der Stahlwerkskonverter 1 automatisch in Richtung Schlackenabstich gekippt wird. Wird die Position Beginn Schlackenabstich erreicht (vgl. Fig. 3, Kippwinkel -100°), wird der Stahlwerkskonverter 1 solange mit minimaler Geschwindigkeit weitergekippt, bis über den Tiegelmund Schlackenschmelze 9 in den Schlackenkübel 10, der zuvor in Stellung gebracht wurde, fließt. Auch während dieses Vorgangs wird der Schlackenwagen 8 in Abhängigkeit des Konverterkippwinkels automatisch positioniert. Der Zusammenhang zwischen Kippwinkel und Schlackenwagen 8 ist ebenfalls fix im Automatisierungssystem hinterlegt und wird ebenfalls anlagenspezifisch angepasst. Ein Schlackenerkennungssystem erkennt das Ausfließen der Schlackenschmelze 9.Subsequently, the casting of slag melt 9 via the converter mouth 13, and also automatically. It is started by the operator, after which the steel mill converter 1 is automatically tilted in the direction of slag tapping. If the position starting slag tap is reached (cf. Fig. 3 , Tilt angle -100 °), the steelworks converter 1 is further tipped at minimum speed until over the crucible mouth slag melt 9 in the slag bucket 10, which was previously placed in position flows. Also during this process, the slag carriage 8 is automatically positioned depending on the converter tilt angle. The relationship between tilt angle and Schlackenwagen 8 is also stored permanently in the automation system and is also adapted to the system. A slag detection system detects the outflow of the slag melt 9.

Ab diesem Zeitpunkt übernimmt die Abstichregelung die Steuerung des Abgießvorgangs. Der Stahlwerkskonverter 1 wird nun solange kontinuierlich oder schrittweise entsprechend dem im Automatisierungssystem hinterlegten Schema weitergekippt, bis durch das Schlackenerkennungssystem Reststahl erkannt wird oder der maximale Abgießkippwinkel (vgl. Fig. 4, Kippwinkel - 150°) erreicht wird. Nach Erreichen des maximalen Kippwinkels oder bei Reststahlerkennung wird der Stahlwerkskonverter wieder automatisch aufgerichtet.From this time the tapping control takes over the control of the pouring process. The steelworks converter 1 is now continuously or stepwise tipped according to the scheme deposited in the automation system until residual steel is detected by the slag detection system or the maximum pouring tilt angle (cf. Fig. 4 , Tilt angle - 150 °) is achieved. After reaching the maximum tilt angle or residual steel detection, the steelworks converter is automatically raised again.

Claims (12)

  1. Method for pouring off slag and/or steel melt (9, 6), from a steelworks converter (1), into a ladle (7) or a slag pot (10), comprising the combination of the following features:
    - establishing the tilting position of the steelworks converter (1) in which the slag and/or steel melt (6, 9) to be poured off leaves the steelworks converter (1) in the form of a casting stream (18), carried out in an automated manner with the aid of a computer control,
    - determining the position of the casting stream (18) produced by the established tilting position of the steelworks converter (1), carried out in an automated manner with the aid of a computer control,
    and, in accordance with a
    relationship adapted installation-specifically and stored as a fixed parameter in an automation system between the tilting angle of the steelworks converter (1) and the position of the ladle carriage (5) carrying the ladle (7),
    or between the tilting angle of the steelworks converter (1) and the position of a slag carriage (8) carrying the slag pot,
    or between the tilting angle of the steelworks converter (1) and the position of the casting stream (18),
    - bringing the ladle (7) or the slag pot (10) into position for receiving the casting stream (18) produced by the steelworks converter (1) in accordance with the established tilting position, carried out in an automated manner with the aid of a computer control, and, after pouring off has begun,
    - adjusting the ladle (7) or the slag pot (10) in accordance with the casting stream (18) as it changes in dependence on the tilting angle of the steelworks converter (1), which changes as the pouring off progresses, carried out in an automated manner with the aid of a computer control.
  2. Method according to Claim 1, characterized in that the height of the bath level (16) in the steelworks converter (1) is established before establishing the tilting position, by a melt bath level measuring device (11).
  3. Method according to Claim 1 or 2, characterized in that the height of the bath level (16) in the steelworks converter (1) is established before establishing the tilting position, by calculation on the basis of the internal volume of the steelworks converter (1) and the weight of the slag and/or steel melt (6, 9).
  4. Method according to Claim 3, characterized in that the internal volume of the steelworks converter (1) is measured by means of a laser scanner before the filling of the steelworks converter (1).
  5. Method according to Claim 2, characterized in that the measuring of the bath level (16) in the steelworks converter (1) is performed by means of a melt bath level measuring device (11), to be precise by measuring the angle (14) between a measuring beam (15) and the bath level (16) and the distance of the bath level (16) from the measuring device (11).
  6. Method according to one of Claims 1 to 5, characterized in that, for pouring off steel melt (6) from a steelworks converter (1), the bath level (16) of the slag melt (9) is ascertained, the tilting position of the steelworks converter (1) for pouring off the steel melt (6) being determined with allowance for the bath level of the slag melt (9) in such a way that the bath level (16) of the slag melt (9) for the tilting position of the steelworks converter (1) is at a safe distance from the converter mouth (13) of the steelworks converter (1) when the steel melt (6) is tapped.
  7. Method according to one of Claims 1 to 6, characterized in that the steelworks converter (1) is tilted continuously during the pouring off of melt (6, 9).
  8. Method according to one of Claims 1 to 7, characterized in that the steelworks converter (1) is tilted step by step during the pouring off of slag and/or steel melt (6, 9).
  9. Method according to one of Claims 1 to 8, characterized in that an additive is introduced into the receiving vessel (7, 10) by means of an adding chute (19), the adding chute (19) being adjusted in accordance with the casting stream (18) as it changes in dependence on the tilting angle of the steelworks converter (1), which changes as the pouring off progresses, and/or in accordance with the adjusted receiving vessel (7, 10).
  10. Installation for carrying out the method according to one of Claims 1 to 9, characterized by the combination of the following features:
    - a steelworks converter (1), equipped with a position measuring device for measuring the tilting angle and an associated control for tilting the steelworks converter (1),
    - a receiving vessel (7, 10) in the form of a ladle or a slag pot, which can be made to travel in the direction of the tilting plane of the steelworks converter (1), with a position measuring device and an associated control for the travelling of the ladle (7) or of the slag pot (10),
    - a measuring device for directly or indirectly, preferably continuously, recording the bath level (16) of the slag and/or steel melt (6, 9) in the steelworks converter (1), and optionally by a
    - device for detecting the end of tapping, the beginning of slag tapping and residual steel.
  11. Installation according to Claim 10, characterized in that, for the adding of an additive into the ladle (7) or the slag pot (10), an adding chute is provided, and is equipped with a position measuring device for measuring the position and an associated control for positioning the adding chute (19) in dependence on the position of the casting stream (18) and/or the position of the ladle (7) or the slag pot (10)
  12. Installation according to Claim 10 or 11, characterized by a weighing device for the ladle (7) or the slag pot (10).
EP07785864A 2006-09-13 2007-06-28 Method for pouring melt from a tiltable metallurgic vessel and system for performing the method Revoked EP2061612B1 (en)

Priority Applications (1)

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PL07785864T PL2061612T3 (en) 2006-09-13 2007-06-28 Method for pouring melt from a tiltable metallurgic vessel and system for performing the method

Applications Claiming Priority (2)

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AT0152406A AT504079B1 (en) 2006-09-13 2006-09-13 METHOD FOR EXTRACTING MELT FROM A TILTABLE METALLURGICAL VESSEL AND APPARATUS FOR CARRYING OUT THE METHOD
PCT/EP2007/005719 WO2008031469A1 (en) 2006-09-13 2007-06-28 Method for pouring melt from a tiltable metallurgic vessel and system for performing the method

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EP2061612A1 EP2061612A1 (en) 2009-05-27
EP2061612B1 true EP2061612B1 (en) 2011-10-05

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EP (1) EP2061612B1 (en)
KR (1) KR20090064452A (en)
CN (1) CN101516548A (en)
AT (2) AT504079B1 (en)
BR (1) BRPI0716772A2 (en)
CA (1) CA2662412A1 (en)
ES (1) ES2372316T3 (en)
MX (1) MX2009002628A (en)
PL (1) PL2061612T3 (en)
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TW (1) TW200815122A (en)
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RU2009113596A (en) 2010-10-20
US20090230159A1 (en) 2009-09-17
AT504079A1 (en) 2008-03-15
PL2061612T3 (en) 2012-02-29
ES2372316T3 (en) 2012-01-18
MX2009002628A (en) 2009-03-24
CA2662412A1 (en) 2008-03-20
UA96303C2 (en) 2011-10-25
KR20090064452A (en) 2009-06-18
ATE527075T1 (en) 2011-10-15
WO2008031469A1 (en) 2008-03-20
TW200815122A (en) 2008-04-01
EP2061612A1 (en) 2009-05-27
CN101516548A (en) 2009-08-26
RU2436655C2 (en) 2011-12-20
AT504079B1 (en) 2008-09-15
BRPI0716772A2 (en) 2013-05-07

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