EP3315616A1 - Device and method for removing metallic and non-metallic adhering material from injection lances when using a converter - Google Patents
Device and method for removing metallic and non-metallic adhering material from injection lances when using a converter Download PDFInfo
- Publication number
- EP3315616A1 EP3315616A1 EP17197866.1A EP17197866A EP3315616A1 EP 3315616 A1 EP3315616 A1 EP 3315616A1 EP 17197866 A EP17197866 A EP 17197866A EP 3315616 A1 EP3315616 A1 EP 3315616A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oxygen lance
- metallic
- caking
- lance
- vibration
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000002347 injection Methods 0.000 title 1
- 239000007924 injection Substances 0.000 title 1
- 239000000463 material Substances 0.000 title 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 118
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 118
- 239000001301 oxygen Substances 0.000 claims abstract description 118
- 230000008878 coupling Effects 0.000 claims abstract description 42
- 238000010168 coupling process Methods 0.000 claims abstract description 42
- 238000005859 coupling reaction Methods 0.000 claims abstract description 42
- 238000000855 fermentation Methods 0.000 claims description 11
- 230000004151 fermentation Effects 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000005284 excitation Effects 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 206010003497 Asphyxia Diseases 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 210000000416 exudates and transudate Anatomy 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Classifications
-
- 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
- C21C5/4693—Skull removal; Cleaning of the converter mouth
-
- 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
- C21C5/4606—Lances or injectors
-
- 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
- F27D25/00—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag
Definitions
- the present invention relates to a device for removing metallic and non-metallic caking of oxygen lances, comprising at least one coupling device, which can be moved by means of a guide to the oxygen lance and operatively connected to the oxygen lance via a gripper associated with the guide.
- the publication GB 2 067 259 A discloses an apparatus for cleaning an oxygen lance with a pair of opposing and interchangeable doctor blades.
- the coupling device is associated with a vibration exciter, with which the oxygen lance, in the operatively connected state, is set into vibration, so that the caking, generated by the on the oxygen lance from the vibration exciter and via the coupling device transmitted vibrations, are solvable by the oxygen lance.
- the frequency with which the vibration exciter vibrates is freely adjustable, so that different natural vibration frequencies of the oxygen lance and the caking can be approached.
- the oscillation exciter to be coupled to the oxygen lance should be able to generate the broadest possible frequency band, since the caking (declarations) along the oxygen lance can have a different thickness. Therefore, a frequency spectrum must be able to be driven, which makes it possible to approach or drive through the different natural frequencies, including higher order, of the system consisting of oxygen lance and the pungent barks. This is also because already after each blowing process not only along the oxygen lance but also at one and the same location on the oxygen lance can have different thicknesses.
- the vibrations generated by the vibration exciter are linear oscillations, which can be formed in two mutually perpendicular directions and perpendicular to the longitudinal axis of the oxygen lance.
- the vibration exciter is designed as a so-called external vibrator, which are associated with at least two flywheel masses.
- At least two inertia masses are arranged parallel to each other, each rotatable relative to each other in opposite directions of rotation, so that in this way a linear vibration can be generated, which is directed perpendicular to the longitudinal axis of the oxygen lance.
- the at least two, each rotatable in the opposite direction Flywheels of the external vibrator offset by 90 ° to each other.
- the vibration exciter is at least one vibrating magnet
- the vibration excitation is inducible via a frequency converter and an AC voltage frequency of 50Hz to 60Hz is converted into an oscillation frequency, which is transferable to the oxygen lance.
- the vibration exciter it is intended to form this as an internal vibrator, via which the water column for cooling within the oxygen lance can be excited to vibrate.
- the coupling device is freely movable axially parallel to the oxygen lance.
- the guide is detachably connectable to the coupling device and can be moved freely with this or without them parallel to the longitudinal axis of the oxygen lance. Due to the different firm buildup and thicknesses (thicknesses) of the fermentation along the oxygen lance, it may be necessary for better cleaning to move the location of the vibrational excitation via the coupling device closer to the free end of the oxygen lance (in the direction of the exit opening and towards the lance head) this is completely removed from the converter. Therefore, a variable positioning of the coupling device is provided.
- Another object of the present invention is to provide a method for the purification of oxygen lances with the device according to the invention.
- the oxygen lance previously treated with the Clean Lance system is removed from the converter mouth. If the lance head is located approx. 1 m above the converter mouth, the oxygen lance drive is stopped.
- the coupling device is moved by means of the guide in a predetermined position to the oxygen lance.
- By moving one with the docking device operatively connected gripper is the coupling of the coupling device with its associated vibration exciters to the oxygen lance.
- the guide (gripper positioning unit) is separated from the gripper and moved back horizontally away from the oxygen lance.
- the shaking process is started and maintained for up to 15 seconds, depending on the thickness of the cure.
- an excitation frequency band is traversed, which is variable in its limits depending on the lance geometry, the water column within the oxygen lance, the Verbärungsdicke and the Verbärungsortes.
- the amplitude of the lance deflections should be as small as possible in order to avoid self-damage due to excessive mechanical stress on the oxygen lance due to the vibration (keyword: resonance catastrophe). Otherwise, fatigue cracks may occur and, in the worst case, water breakage may occur with destruction of the lance and breakage of the oxygen lance from its suspension.
- Frequency and amplitude are adjustable so that a shaking off of the fermentation can take place.
- the upper value of the frequency band can therefore go up to the 4th natural frequency of the system, with a maximum amplitude of + - 20 mm.
- the oxygen lance weight is depending on the design and length of the lance incl.
- the water filling about 3 t to 6 t.
- the coupling device, the gripper and the vibration exciter are moved back again with the aid of the docked guide (gripper positioning unit).
- the external vibrators are positioned on the oxygen lance via the grippers, the guide (gripper positioning unit) is retracted and the shaking process is repeated for max. 15 s started.
- this process can be repeated several times at different positions of the oxygen lance until the fermentation is correspondingly reduced or removed.
- the coupling device with the vibration exciters then remains positioned on the oxygen lance without shaking until the lance is stopped at the level of the guide unit at the next entry into the converter.
- the external vibrator with gripper is decoupled from the guide and the lance finally enters the converter.
- falling slag or fusible parts can be collected by means of a funnel attached above and around the converter mouth and returned to the converter.
- the shaking time with coupling and uncoupling can be estimated in total at about 2.5 minutes with two coupling and uncoupling (30 s coupling plus 15 s shaking plus 30 s decoupling, and all this twice). In comparison, the conventional burning of the fermentation takes about 10 min.
- the device according to the invention is intended as a supporting measure to treat the oxygen lances with the "SMS clean lance system" developed by the applicant before use in the converter.
- a release agent is sprayed on the still clean oxygen lance, which reduces the caking of the fermentation and facilitates their subsequent removal.
- an additional cooling device can be assigned to the oxygen lance.
- the exudates prior to the use of the abovementioned apparatus and the method for this purpose, are cooled down to such an extent that they no longer have any ductile areas. A flaking off or detachment of the then faster fixed and no longer ductile declarations of the oxygen lance by vibrations is thus even more effective.
- the coupling device 10 consists essentially of a gripper which can be brought via actuators 12 with an oxygen lance 13 in operative connection.
- the gripper 11 so far that the oxygen lance 13 include, hold and vice versa can release again, as shown by the semicircular arrow 12a.
- the vibration exciters 14 may be flanged to the coupling device 10 as so-called external vibrators and may vibrate the oxygen lance 13 with different frequencies and amplitudes.
- the different frequency points are in Fig. 1 are indicated with a corresponding P and can shift laterally as indicated by the double arrows ( ⁇ ) associated with the points P.
- the vibrations generated by the vibration exciter 14 are linear vibrations, which are formed in two mutually perpendicular directions and perpendicular to the longitudinal axis 17 of the oxygen lance 13.
- the vibration exciters 14 are formed as external vibrators 14a.
- the oxygen lance 13 is connected to a lifting device 18, over which it can be moved vertically, as, inter alia, in Fig. 3 represented and by the vertical arrow ( ⁇ ) is indicated.
- the coupling device 10 In order to be able to approach the coupling device 10 to the oxygen lance 13, it can be detachably connected to a guide 15 designed as a gripper positioning unit. With the help of the lifting device 15, the coupling device 10 can be lifted into the guide 15.
- the guide 15 is in turn associated with a receiving means 16, to which it is articulated.
- the receiving means 16 is, in this embodiment, virtually as a fixed point fixed to a foundation (not shown) connected.
- the task of the guide 15 is to move the coupling device 10 back and forth in a horizontal movement toward the oxygen lance 13, as shown by the horizontal arrow ( ⁇ ) associated with the guide 15.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Die Erfindung betrifft eine Vorrichtung und Verfahren zur Entfernung von metallischen und nichtmetallischen Anbackungen an einer Sauerstofflanze, mit mindestens einer Ankopplungsvorrichtung (10), die mittels einer Führung (11) an die Sauerstofflanze heranfahrbar und mit der Sauerstofflanze (12) über einen der Führung (11) zugeordneten Greifer (13) in Wirkverbindung bringbar ist. Dabei ist der Ankopplungsvorrichtung (10) ein Schwingungsanreger (14) zugeordnet, mit dem die Sauerstofflanze (12), im wirkverbundenen Zustand, in Schwingungen versetzbar ist, so dass die Anbackungen durch die auf die Sauerstofflanze (12) vom Schwingungsanreger (14) erzeugten und über die Ankopplungsvorrichtung (10) übertragenen Schwingungen von der Sauerstofflanze lösbar sind.The invention relates to a device and method for removing metallic and nonmetallic caking on an oxygen lance, comprising at least one coupling device (10) which can be moved by means of a guide (11) to the oxygen lance and with the oxygen lance (12) via a guide (11 ) associated gripper (13) can be brought into operative connection. In this case, the coupling device (10) is associated with a vibration exciter (14) with which the oxygen lance (12), in the operatively connected state, is set into vibration, so that the caking by the oxygen lance (12) from the vibration exciter (14) and via the coupling device (10) transmitted vibrations of the oxygen lance are solvable.
Description
Die vorliegende Erfindung betrifft eine Vorrichtung zur Entfernung von metallischen und nichtmetallischen Anbackungen an Sauerstofflanzen, mit mindestens einer Ankopplungsvorrichtung, die mittels einer Führung an die Sauerstofflanze heranfahrbar und mit der Sauerstofflanze über einen der Führung zugeordneten Greifer in Wirkverbindung bringbar ist.The present invention relates to a device for removing metallic and non-metallic caking of oxygen lances, comprising at least one coupling device, which can be moved by means of a guide to the oxygen lance and operatively connected to the oxygen lance via a gripper associated with the guide.
Metallische und nichtmetallische Anbackungen, sog. Verbärungen, an Sauerstofflanzen treten vom Lanzenkopf beginnend auf einer Länge von bis zu sieben Metern aufwärts auf. Die Verbärungen sind über den Umfang des Lanzenquerschnittes durch die Längsachse betrachtet asymmetrisch verteilt und können ein Gewicht von mehreren Tonnen erreichen. Es kommt vor, dass die Verbärungen einen Durchmesser aufweisen, der so groß ist, dass die Sauerstofflanze nicht mehr aus dem Konvertermund gezogen werden kann. Dies macht eine zeitaufwändige und gefährliche Wartung erforderlich, was wiederum zu einem Produktionsausfall führt. Des Weiteren erhöht sich bei wassergekühlten Lanzen die Gefahr eines Wasserdurchbruchs und macht zudem eine Notausfuhr der Lanze aus dem Konverter unmöglich und bedingt einen Totalausfall des betroffenen Konverters auf unbestimmte Zeit.Metallic and non-metallic caking, so-called. Explanations of oxygen lances occur from the lance head beginning up to a length of up to seven meters. The declarations are asymmetrically distributed over the circumference of the lance cross section viewed through the longitudinal axis and can reach a weight of several tons. It happens that the declarations have a diameter that is so large that the oxygen lance can no longer be pulled out of the converter mouth. This requires time-consuming and dangerous maintenance, which in turn leads to a loss of production. Furthermore, increases in water-cooled lances the risk of water leakage and also makes an emergency export of the lance from the converter impossible and requires a total failure of the affected converter indefinitely.
Um die Verbärungen an den Sauerstofflanzen zu verringern und deren Entfernung zu vereinfachen sind Verfahren bekannt, bei denen ein Trennmittel vor dem Einfahren in den Konverter auf die Lanze aufgesprüht wird. Das sog. Clean-Lance-System der Anmelderin soll hierfür exemplarisch genannt sein.In order to reduce the exacerbations of the oxygen lances and to simplify their removal processes are known in which a release agent is sprayed onto the lance before entering the converter. The so-called clean-lance system of the applicant should be mentioned as an example.
Ferner sind mechanische Abstreifer bekannt, wie sie in der Druckschrift
Die Druckschrift
Aus der Druckschrift
Weiter ist aus der
Die bekannten Vorrichtungen zum Reinigen von Sauerstofflanzen bzw. von Lanzen zum Einbringen in metallurgische Gefäße haben sich nicht bewährt; sie weisen den Nachteil auf, dass ihre Standzeiten durch den relativ hohen Verschleiß der mechanisch stark beanspruchten Abstreifmittel relativ kurz sind. Zudem ist die Wartung bzw. die Reinigung durch Abbrennen derartiger Vorrichtungen zeit- und kostenintensiv. Das Abbrennen von größeren Verbärungen ist auch für ein Reinigungsteam nicht ungefährlich. Regelmäßige manuelle Verbärungsentfernung von der Lanze bindet wertvolle Ressourcen und kann zu Verzögerungen im Produktionsablauf führen.The known devices for cleaning oxygen lances or lances for introduction into metallurgical vessels have not proven successful; they have the disadvantage that their service life is relatively short due to the relatively high wear of the mechanically heavily stressed stripping. In addition, the maintenance or cleaning by burning of such devices is time consuming and costly. The burning off of larger amounts of fermentation is not without danger for a cleaning team. Regular manual stain removal from the lance binds valuable resources and can lead to delays in the production process.
Des Weiteren treten folgende Personengefährdungen bei Arbeiten in der Nähe eines Lanzendomes auf:
- Erstickungsgefahr durch Einatmen von Kohlenmonoxid
- Verletzungsgefahr durch herabfallende Schlacken- und Schmelzenteile
- Hohe Staubbelastung in unmittelbarer Nähe zum Konverter
- Verletzungsgefahr durch die Verpuffung explosiver Gase
- Am Lanzendom treten sehr hohe Umgebungstemperaturen auf, was wiederum zu hohen Kreislaufbelastungen beim Wartungspersonal führt und dessen Einsetzbarkeit erheblich verkürzt.
- Danger of suffocation due to inhalation of carbon monoxide
- Risk of injury due to falling slag and melting parts
- High level of dust in the immediate vicinity of the converter
- Risk of injury due to the deflagration of explosive gases
- At Lanzendom very high ambient temperatures occur, which in turn leads to high circulation loads on maintenance personnel and its applicability shortened considerably.
Es ist daher Aufgabe der vorliegenden Erfindung, eine Vorrichtung zur Entfernung von metallischen und nichtmetallischen Anbackungen an Sauerstofflanzen zu schaffen, mit der die Betriebskosten durch höhere Standzeiten gesenkt und die Produktionskapazitäten von Konverter-Einheiten verlängert werden kann.It is therefore an object of the present invention to provide a device for the removal of metallic and non-metallic caking of oxygen lances, with which the operating costs can be reduced by longer service life and the production capacity of converter units can be extended.
Diese Aufgabe wird durch die im Anspruch 1 angegebenen Merkmale gelöst, insbesondere dadurch, dass der Ankopplungsvorrichtung ein Schwingungsanreger zugeordnet ist, mit dem die Sauerstofflanze, im wirkverbundenen Zustand, in Schwingungen versetzbar ist, sodass die Anbackungen, durch die auf die Sauerstofflanze vom Schwingungsanreger erzeugten und über die Ankopplungsvorrichtung übertragenen Schwingungen, von der Sauerstofflanze lösbar sind.This object is achieved by the features specified in claim 1, in particular the fact that the coupling device is associated with a vibration exciter, with which the oxygen lance, in the operatively connected state, is set into vibration, so that the caking, generated by the on the oxygen lance from the vibration exciter and via the coupling device transmitted vibrations, are solvable by the oxygen lance.
In einer besonders bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung ist es vorgesehen, dass die Frequenz, mit der der Schwingungsanreger schwingt, frei einstellbar ist, sodass unterschiedliche Eigenschwingungsfrequenzen der Sauerstofflanze und der Anbackungen anfahrbar sind. Der an der Sauerstofflanze anzukoppelnde Schwingungsanreger sollte ein möglichst breites Frequenzband generieren können, da die Anbackungen (Verbärungen) entlang der Sauerstofflanze unterschiedlich dick ausgebildet sein können. Deshalb muss ein Frequenzspektrum gefahren werden können, welches es ermöglicht, die unterschiedlichen Eigenfrequenzen, auch höherer Ordnung, des Systems bestehend aus Sauerstofflanze und daran angebackenen Verbärungen anzufahren bzw. durchzufahren. Dies auch deshalb, da schon Verbärungen nach jedem Blasvorgang nicht nur entlang der Sauerstofflanze, sondern auch an ein und demselben Ort an der Sauerstofflanze unterschiedlich stark ausgeprägte Schichtdicken aufweisen können.In a particularly preferred embodiment of the device according to the invention, it is provided that the frequency with which the vibration exciter vibrates, is freely adjustable, so that different natural vibration frequencies of the oxygen lance and the caking can be approached. The oscillation exciter to be coupled to the oxygen lance should be able to generate the broadest possible frequency band, since the caking (declarations) along the oxygen lance can have a different thickness. Therefore, a frequency spectrum must be able to be driven, which makes it possible to approach or drive through the different natural frequencies, including higher order, of the system consisting of oxygen lance and the pungent barks. This is also because already after each blowing process not only along the oxygen lance but also at one and the same location on the oxygen lance can have different thicknesses.
In einer weiteren besonders bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung sind deshalb die vom Schwingungserreger erzeugten Schwingungen lineare Schwingungen, die in zwei senkrecht zueinander stehenden Richtungen und senkrecht zur Längsachse der Sauerstofflanze ausbildbar sind.In a further particularly preferred embodiment of the device according to the invention, therefore, the vibrations generated by the vibration exciter are linear oscillations, which can be formed in two mutually perpendicular directions and perpendicular to the longitudinal axis of the oxygen lance.
Gemäß einer besonders bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung ist es vorgesehen, dass der Schwingungsanreger als ein sogenannter Außenrüttler ausgebildet ist, dem mindestens zwei Schwungmassen zugeordnet sind.According to a particularly preferred embodiment of the device according to the invention, it is provided that the vibration exciter is designed as a so-called external vibrator, which are associated with at least two flywheel masses.
Bei einer weiteren Ausführungsform der erfindungsgemäßen Vorrichtung sind dem Außenrüttler mindestens zwei parallel zueinander angeordnete Schwungmassen zugeordnet, die jeweils in entgegengesetzter Drehrichtung relativ zueinander rotierbar sind, sodass hierdurch eine lineare Schwingung erzeugt werden kann, die senkrecht zur Längsachse der Sauerstofflanze gerichtet ist.In a further embodiment of the device according to the invention at least two inertia masses are arranged parallel to each other, each rotatable relative to each other in opposite directions of rotation, so that in this way a linear vibration can be generated, which is directed perpendicular to the longitudinal axis of the oxygen lance.
Gemäß einer weiteren vorteilhaften Ausführungsform der erfindungsgemäßen Vorrichtung können die mindestens zwei, jeweils in gegenläufiger Richtung rotierbar ausgebildeten, Schwungmassen des Außenrüttlers um 90° versetzt zueinander angeordnet sein.According to a further advantageous embodiment of the device according to the invention, the at least two, each rotatable in the opposite direction, Flywheels of the external vibrator offset by 90 ° to each other.
Des Weiteren ist es in einer anderen erfindungsgemäßen Ausführungsform vorgesehen, dass der Schwingungsanreger mindestens ein Schwingmagnet ist, die Schwingungsanregung über einen Frequenzumrichter induzierbar ist und eine Wechselspannungsfrequenz von 50Hz bis 60Hz in eine Schwingungsfrequenz umwandelt wird, die auf die Sauerstofflanze übertragbar ist. Bei einer derartigen Ausführungsform des Schwingungsanregers ist es vorgesehen, diesen als einen Innenrüttler auszubilden, über den die Wassersäule zur Kühlung innerhalb der Sauerstofflanze zum Schwingen anregt werden kann.Furthermore, it is provided in another embodiment of the invention that the vibration exciter is at least one vibrating magnet, the vibration excitation is inducible via a frequency converter and an AC voltage frequency of 50Hz to 60Hz is converted into an oscillation frequency, which is transferable to the oxygen lance. In such an embodiment of the vibration exciter, it is intended to form this as an internal vibrator, via which the water column for cooling within the oxygen lance can be excited to vibrate.
In einer anderen Ausführungsform ist es vorgesehen, dass die Ankopplungsvorrichtung achsparallel zur Sauerstofflanze frei verfahrbar ist.In another embodiment, it is provided that the coupling device is freely movable axially parallel to the oxygen lance.
Gemäß einer weiteren besonders vorteilhaften Ausführungsform der erfindungsgemäßen Vorrichtung ist es vorgesehen, dass die Führung lösbar mit der Ankopplungsvorrichtung verbindbar ist und mit dieser oder ohne diese parallel zur Längsachse der Sauerstofflanze frei verfahren werden kann. Aufgrund der unterschiedlich festen Anhaftungen und Stärken (Dicken) der Verbärung entlang der Sauerstofflanze kann es zur besseren Reinigung erforderlich sein, den Ort der Schwingungsanregung über die Ankopplungsvorrichtung näher zum freien Ende der Sauerstofflanze (in Richtung der Austrittsöffnung und hin zum Lanzenkopf) zu verschieben, wenn diese komplett aus dem Konverter herausgefahren wird. Deshalb ist eine variable Positionierung der Ankopplungsvorrichtung vorgesehen.According to a further particularly advantageous embodiment of the device according to the invention, it is provided that the guide is detachably connectable to the coupling device and can be moved freely with this or without them parallel to the longitudinal axis of the oxygen lance. Due to the different firm buildup and thicknesses (thicknesses) of the fermentation along the oxygen lance, it may be necessary for better cleaning to move the location of the vibrational excitation via the coupling device closer to the free end of the oxygen lance (in the direction of the exit opening and towards the lance head) this is completely removed from the converter. Therefore, a variable positioning of the coupling device is provided.
Eine weitere Aufgabe der vorliegenden Erfindung ist es, ein Verfahren für die Reinigung von Sauerstofflanzen mit der erfindungsgemäßen Vorrichtung zur Verfügung zu stellen.Another object of the present invention is to provide a method for the purification of oxygen lances with the device according to the invention.
Das Verfahren ist durch die folgenden Schritte gekennzeichnet:The procedure is characterized by the following steps:
Nach dem Ende des Blasvorganges wird die vorher mit dem Clean-Lance-System behandelte Sauerstofflanze aus dem Konvertermund herausgefahren. Befindet sich der Lanzenkopf ca. 1 m oberhalb des Konvertermundes wird die Sauerstofflanzenfahrt gestoppt.After the end of the blowing process, the oxygen lance previously treated with the Clean Lance system is removed from the converter mouth. If the lance head is located approx. 1 m above the converter mouth, the oxygen lance drive is stopped.
Die Ankopplungsvorrichtung wird mittels der Führung in eine vorbestimmte Position an die Sauerstofflanze herangefahren. Durch Zufahren eines mit der Ankopplungsvorrichtung wirkverbundenen Greifers erfolgt die Ankopplung der Ankopplungsvorrichtung mit den ihr zugeordneten Schwingungsanregern an die Sauerstofflanze.The coupling device is moved by means of the guide in a predetermined position to the oxygen lance. By moving one with the docking device operatively connected gripper is the coupling of the coupling device with its associated vibration exciters to the oxygen lance.
Die Führung (Greiferpositioniereinheit) wird vom Greifer getrennt und horizontal weg von der Sauerstofflanze zurückgefahren.The guide (gripper positioning unit) is separated from the gripper and moved back horizontally away from the oxygen lance.
Der Rüttelvorgang wird gestartet und je nach der Verbärungsdicke bis zu 15 sec. lang aufrechterhalten. Dabei wird ein Anregungsfrequenzband durchfahren, welches in Abhängigkeit der Lanzengeometrie, der Wassersäule innerhalb der Sauerstofflanze, der Verbärungsdicke und des Verbärungsortes variabel in seinen Grenzen ist. Die Amplitude der Lanzenausschläge sollte dabei möglichst gering sein, um eine Eigenbeschädigung durch eine zu hohe mechanische Belastung der Sauerstofflanze durch die Vibration (Stichwort: Resonanzkatastrophe) zu vermeiden. Andernfalls können Ermüdungsrisse entstehen und es kann schlimmstenfalls zum Wasserdurchbruch mit Zerstörung der Lanze und dem Ausbrechen der Sauerstofflanze aus ihrer Aufhängung kommen.The shaking process is started and maintained for up to 15 seconds, depending on the thickness of the cure. In this case, an excitation frequency band is traversed, which is variable in its limits depending on the lance geometry, the water column within the oxygen lance, the Verbärungsdicke and the Verbärungsortes. The amplitude of the lance deflections should be as small as possible in order to avoid self-damage due to excessive mechanical stress on the oxygen lance due to the vibration (keyword: resonance catastrophe). Otherwise, fatigue cracks may occur and, in the worst case, water breakage may occur with destruction of the lance and breakage of the oxygen lance from its suspension.
Frequenz und Amplitude werden so einstellbar, dass eine Abschüttelung der Verbärung erfolgen kann. Der obere Wert des Frequenzbandes kann daher bis zur 4. Eigenfrequenz des Systems hochgehen, bei einer Amplitude von maximal +- 20 mm. Das Sauerstofflanzengewicht beträgt je nach Ausführung und Länge der Lanze incl. der Wasserfüllung ca. 3 t bis 6 t.Frequency and amplitude are adjustable so that a shaking off of the fermentation can take place. The upper value of the frequency band can therefore go up to the 4th natural frequency of the system, with a maximum amplitude of + - 20 mm. The oxygen lance weight is depending on the design and length of the lance incl. The water filling about 3 t to 6 t.
Nach dem Rüttelvorgang werden die Ankopplungsvorrichtung, der Greifer und die Schwingungsanreger mit Hilfe der angedockten Führung (Greiferpositioniereinheit) wieder zurückgefahren.After the shaking process, the coupling device, the gripper and the vibration exciter are moved back again with the aid of the docked guide (gripper positioning unit).
Anschließend wird die Sauerstofflanze selber weiter nach oben gefahren und je nach verbleibender Verbärung wird nach ca. 1 m - 3 m Verfahrweg die Sauerstofflanze wieder gestoppt.Then the oxygen lance itself is driven upwards and depending on the remaining fermentation the oxygen lance is stopped again after approx. 1 m - 3 m travel.
Die Außenrüttler werden über die Greifer wieder an der Sauerstofflanze positioniert, die Führung (Greiferpositioniereinheit) wird zurückgefahren und der Rüttelvorgang wird erneut für max. 15 s gestartet.The external vibrators are positioned on the oxygen lance via the grippers, the guide (gripper positioning unit) is retracted and the shaking process is repeated for max. 15 s started.
Je nach Verbärungsstärke kann dieser Vorgang an unterschiedlichen Positionen der Sauerstofflanze mehrfach wiederholt werden, bis die Verbärung entsprechend reduziert bzw. entfernt ist.Depending on the strength of the verb, this process can be repeated several times at different positions of the oxygen lance until the fermentation is correspondingly reduced or removed.
Denkbar ist es auch, kurz vor dem Herausfahren der Sauerstofflanze aus dem Konverter die Außenrüttler anzukoppeln und schon während des Herausfahrens der Sauerstofflanze aus dem Konverter den Rüttelvorgang zu starten, bis die Sauerstofflanze ihre Endposition erreicht hat und der Rüttler ausgeschaltet wird.It is also conceivable to couple the external vibrators shortly before the oxygen lance is moved out of the converter and to start the shaking process while the oxygen lance is being removed from the converter until the oxygen lance has reached its end position and the vibrator is switched off.
Die Ankopplungsvorrichtung mit den Schwingungsanregern bleibt dann solange an der Sauerstofflanze positioniert ohne zu rütteln, bis beim nächsten Einfahrvorgang in den Konverter die Lanze auf Höhe der Führungseinheit gestoppt wird. Der Außenrüttler mit Greifer wird von der Führung entkoppelt und die Lanze fährt endgültig in den Konverter ein.The coupling device with the vibration exciters then remains positioned on the oxygen lance without shaking until the lance is stopped at the level of the guide unit at the next entry into the converter. The external vibrator with gripper is decoupled from the guide and the lance finally enters the converter.
Bei dem Rüttelprozess herabfallende Schlacken- oder Schmelzenteile können mit Hilfe eines oberhalb und um den Konvertermund angebrachten Trichters aufgefangen und in den Konverter zurückgeleitet werden.In the shaking process falling slag or fusible parts can be collected by means of a funnel attached above and around the converter mouth and returned to the converter.
Die Rüttelzeit mit An- und Abkoppeln kann insgesamt auf ca. 2,5 Minuten bei zweimaligem An- und Abkoppeln geschätzt werden (30 s Ankoppeln plus 15 s Rütteln plus 30 s Abkoppeln, und dies alles zwei mal). Im Vergleich dazu dauert das konventionelle Abbrennen der Verbärung ca. 10 min.The shaking time with coupling and uncoupling can be estimated in total at about 2.5 minutes with two coupling and uncoupling (30 s coupling plus 15 s shaking plus 30 s decoupling, and all this twice). In comparison, the conventional burning of the fermentation takes about 10 min.
Dies bedeutet eine Zeitersparnis von ca. 7,5 min für die Reinigung. Diese Zeit steht für die weitere Produktion unter sonst gleichen Bedingungen zur Verfügung.This means a time saving of about 7.5 minutes for cleaning. This time is available for further production under otherwise identical conditions.
Für alle obengenannten Ausführungsformen der erfindungsgemäßen Vorrichtung ist als unterstützende Maßnahme vorgesehen, die Sauerstofflanzen mit dem von der Anmelderin entwickelten "SMS-Clean-Lance-System" vor dem Einsatz in dem Konverter zu behandeln. Hierbei wird auf die noch saubere Sauerstofflanze ein Trennmittel aufgesprüht, die das Anbacken der Verbärung verringert und deren anschließende Entfernung erleichtert.For all of the abovementioned embodiments of the device according to the invention, it is intended as a supporting measure to treat the oxygen lances with the "SMS clean lance system" developed by the applicant before use in the converter. Here, a release agent is sprayed on the still clean oxygen lance, which reduces the caking of the fermentation and facilitates their subsequent removal.
Als weitere unterstützende Maßnahme zum Entfernen der Verbärungen an Sauerstofflanzen kann eine zusätzliche Kühlvorrichtung der Sauerstofflanze zugeordnet sein. Dadurch werden die Verbärungen, vor dem Einsatz der oben genannten Vorrichtung und dem Verfahren hierzu, soweit abgekühlt, dass sie keine duktilen Bereiche mehr aufweisen. Ein Abplatzen bzw. Ablösen der dann schneller fest gewordenen und nicht mehr duktilen Verbärungen von der Sauerstofflanze durch Vibrationen wird somit noch effektiver.As a further supporting measure for removing the declarations of oxygen lances, an additional cooling device can be assigned to the oxygen lance. As a result, the exudates, prior to the use of the abovementioned apparatus and the method for this purpose, are cooled down to such an extent that they no longer have any ductile areas. A flaking off or detachment of the then faster fixed and no longer ductile declarations of the oxygen lance by vibrations is thus even more effective.
Die Erfindung wird im Folgenden anhand von beispielhaften Ausführungsformen unter Bezugnahme auf die beigefügten Zeichnungen näher erläutert. Es zeigen:
- Fig. 1
- eine schematische Darstellung einer Ausführungsform der erfindungsgemäßen Ankopplungsvorrichtung mit einer Führung zum horizontalen Verfahren der Ankopplungsvorrichtung an eine Sauerstofflanze heran oder von dieser weg, in einer Seitenansicht;
- Fig. 2
- die schematische Darstellung der erfindungsgemäßen Ankopplungsvorrichtung, mit der ihr zugeordneten Greifer bzw. Greiferpositioniereinrichtung und entsprechenden teleskopisch verfahrbaren Aktuatoren, in Wirkverbindung mit der Sauerstofflanze in einer Draufsicht;
- Fig.3
- eine Seitenansicht in teilweise schematischer Darstellung der erfindungsgemäßen Ankopplungsvorrichtung an eine Sauerstofflanze mit Lanzenaufhängung und zugeordneter Kühlungseinheit.
- Fig. 1
- a schematic representation of an embodiment of the coupling device according to the invention with a guide for horizontal movement of the coupling device to an oxygen lance zoom or away, in a side view;
- Fig. 2
- the schematic representation of the coupling device according to the invention, with its associated gripper or gripper positioning and corresponding telescopically movable actuators, in operative connection with the oxygen lance in a plan view;
- Figure 3
- a side view in a partially schematic representation of the coupling device according to the invention to an oxygen lance with lance suspension and associated cooling unit.
Wie die
Des Weiteren sind der Ankopplungsvorrichtung 10 in dieser Ausführungsform zwei Schwingungsanreger 14 zugeordnet. Die Schwingungsanreger 14 können als sogenannte Außenrüttler an die Ankopplungsvorrichtung 10 angeflanscht sein und können mit unterschiedlichen Frequenzen und Amplituden die Sauerstofflanze 13 in Schwingung versetzten. Die unterschiedlichen Frequenzpunkte sind in
Die vom Schwingungsanreger 14 erzeugten Schwingungen sind lineare Schwingungen, die in zwei senkrecht zueinander stehenden Richtungen und senkrecht zur Längsachse 17 der Sauerstofflanze 13 ausgebildet sind. In dieser Ausführungsform sind die Schwingungsanreger 14 als Außenrüttler 14a ausgebildet.The vibrations generated by the
Die Sauerstofflanze 13 ist mit einer Hebevorrichtung 18 verbunden, über die sie vertikal verfahren werden kann, wie dies unter anderem, in
Um die Ankopplungsvorrichtung 10 an die Sauerstofflanze 13 heranfahren zu können, kann diese mit einer als Greiferpositionierungseinheit ausgebildeten Führung 15 lösbar verbunden werden. Mit Hilfe der Hebevorrichtung 15 kann die Ankopplungsvorrichtung 10 in die Führung 15 gehoben werden.In order to be able to approach the
Die Führung 15 ist ihrerseits einem Aufnahmemittel 16 zugeordnet, an dem es angelenkt ist. Das Aufnahmemittel 16 ist, in dieser Ausführungsform, quasi als Festpunkt ortsfest mit einem Fundament (nicht dargestellt) verbunden.The
Aufgabe der Führung 15 ist es, die Ankopplungsvorrichtung 10 in einer horizontalen Bewegung zur Sauerstofflanze 13 hin- und von dieser wieder wegzubewegen, wie dies durch den horizontalen Pfeil (↔), der der Führung 15 zugeordnet ist, dargestellt wird.The task of the
- 1010
- Ankopplungsvorrichtungcoupling device
- 1111
- Greifergrab
- 1212
- Aktuatorenactuators
- 12a12a
- halbkreisförmiger Pfeil (als Symbol für das Öffnen und Schließen der Greifer)semicircular arrow (symbolizing the opening and closing of the gripper)
- 1313
- Sauerstofflanzeoxygen lance
- 1414
- Schwingungsanregervibration exciter
- 14a14a
- Außenrüttlervibrators
- 1515
- Führungguide
- 1616
- Aufnahmemittelreceiving means
- 1717
- Längsachselongitudinal axis
- 1818
- Hebevorrichtung SauerstofflanzeLifting device Oxygen lance
Claims (21)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102016120334.3A DE102016120334A1 (en) | 2016-10-25 | 2016-10-25 | Apparatus and method for removing metallic and non-metallic caking on injection lances in converter use |
Publications (2)
Publication Number | Publication Date |
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EP3315616A1 true EP3315616A1 (en) | 2018-05-02 |
EP3315616B1 EP3315616B1 (en) | 2020-08-19 |
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EP17197866.1A Active EP3315616B1 (en) | 2016-10-25 | 2017-10-23 | Device and method for removing metallic and non-metallic adhering material from injection lances when using a converter |
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EP (1) | EP3315616B1 (en) |
DE (1) | DE102016120334A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115094184A (en) * | 2022-06-29 | 2022-09-23 | 阳春新钢铁有限责任公司 | System and method for quickly calibrating lifting height of converter oxygen lance |
CN115430630A (en) * | 2022-08-23 | 2022-12-06 | 新兴铸管股份有限公司 | Oxygen lance sticky slag cleaning device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113739594A (en) * | 2021-09-22 | 2021-12-03 | 新疆宜化化工有限公司 | Automatic breaking process and device for preventing hardening of materials in calcium carbide furnace |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5284104A (en) * | 1975-12-31 | 1977-07-13 | Nippon Steel Corp | Lance equipment for molten metal treatment |
AT381795B (en) * | 1984-05-08 | 1986-11-25 | Voest Alpine Ag | DEVICE FOR CLEANING A LANCE HEAD OF A LANCE THAT CAN BE INSERTED INTO A METALLURGICAL VESSEL |
JP2941737B2 (en) * | 1997-03-27 | 1999-08-30 | 川崎重工業株式会社 | Metal removal equipment for sub-lance for converter |
DE102010024035A1 (en) * | 2009-08-10 | 2011-02-17 | Sms Siemag Ag | Lance for a melting vessel or a metallurgical reaction vessel |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2067259B (en) | 1980-01-15 | 1984-05-23 | Mckee Minerals & Metals Ltd Da | Gas lance cleaning device |
FR2667326B1 (en) | 1990-09-27 | 1992-11-13 | Unimetall Sa | DEVICE FOR SCRAPING A SPEAR FOR INTRODUCING INTO A METALLURGICAL CONTAINER. |
CN103014226B (en) | 2012-11-28 | 2014-04-02 | 夏俊双 | Automatically cleaning apparatus of converter oxygen lance bonded slag |
-
2016
- 2016-10-25 DE DE102016120334.3A patent/DE102016120334A1/en not_active Withdrawn
-
2017
- 2017-10-23 EP EP17197866.1A patent/EP3315616B1/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5284104A (en) * | 1975-12-31 | 1977-07-13 | Nippon Steel Corp | Lance equipment for molten metal treatment |
AT381795B (en) * | 1984-05-08 | 1986-11-25 | Voest Alpine Ag | DEVICE FOR CLEANING A LANCE HEAD OF A LANCE THAT CAN BE INSERTED INTO A METALLURGICAL VESSEL |
JP2941737B2 (en) * | 1997-03-27 | 1999-08-30 | 川崎重工業株式会社 | Metal removal equipment for sub-lance for converter |
DE102010024035A1 (en) * | 2009-08-10 | 2011-02-17 | Sms Siemag Ag | Lance for a melting vessel or a metallurgical reaction vessel |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115094184A (en) * | 2022-06-29 | 2022-09-23 | 阳春新钢铁有限责任公司 | System and method for quickly calibrating lifting height of converter oxygen lance |
CN115430630A (en) * | 2022-08-23 | 2022-12-06 | 新兴铸管股份有限公司 | Oxygen lance sticky slag cleaning device |
Also Published As
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DE102016120334A1 (en) | 2018-05-09 |
EP3315616B1 (en) | 2020-08-19 |
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