EP3315616B1 - 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 PDF

Info

Publication number
EP3315616B1
EP3315616B1 EP17197866.1A EP17197866A EP3315616B1 EP 3315616 B1 EP3315616 B1 EP 3315616B1 EP 17197866 A EP17197866 A EP 17197866A EP 3315616 B1 EP3315616 B1 EP 3315616B1
Authority
EP
European Patent Office
Prior art keywords
oxygen lance
metallic
incrustations
guide
oxygen
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.)
Active
Application number
EP17197866.1A
Other languages
German (de)
French (fr)
Other versions
EP3315616A1 (en
Inventor
Heiko Klose
Oliver Wiens
Hans-Jürgen ODENTHAL
Ronald Genßler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Group GmbH
Original Assignee
SMS Group GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMS Group GmbH filed Critical SMS Group GmbH
Publication of EP3315616A1 publication Critical patent/EP3315616A1/en
Application granted granted Critical
Publication of EP3315616B1 publication Critical patent/EP3315616B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 on oxygen lances, with at least one coupling device which can be approached to the oxygen lance by means of a guide and can be brought into operative connection with the oxygen lance via a gripper assigned to the guide.
  • the pamphlet GB 2 067 259 A discloses an apparatus for cleaning an oxygen lance having a pair of opposing and replaceable doctor blades.
  • the AT 381 795 B discloses a device for cleaning the lance head, here a milling head milling off the caking on the front side of the lance head.
  • DE 10 2010 024035 pointed out, which suggests providing the lance with a coating of boron nitride or carbide before use in order to prevent caking.
  • a fixed carrier which has wiper lips and through which a lance can be pulled in the longitudinal axis direction in order to wipe off the deposits on the lance surface.
  • the coupling device is assigned a vibration exciter with which the oxygen lance, in the operationally connected state, can be made to vibrate, the vibrations generated by the vibration exciter being linear vibrations that split into two directions perpendicular to one another and perpendicular to the longitudinal axis of the oxygen lance can be formed.
  • 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 vibration exciter to be coupled to the oxygen lance should be able to generate as broad a frequency band as possible, since the caking (deposits) along the oxygen lance can have different thicknesses. It must therefore be possible to drive a frequency spectrum which enables the different natural frequencies, even higher order ones, of the system consisting of oxygen lance and baked-on deposits to be approached or passed through. This is also due to the fact that even after each blowing process, the layer thicknesses can differ not only along the oxygen lance, but also at one and the same place on the oxygen lance.
  • the vibration exciter is designed as a so-called external vibrator to which at least two centrifugal masses are assigned.
  • the external vibrator is assigned at least two centrifugal masses arranged parallel to one another, which can each be rotated in opposite directions of rotation relative to one another, so that a linear oscillation can be generated that is directed perpendicular to the longitudinal axis of the oxygen lance.
  • the at least two centrifugal masses of the external vibrator can be arranged offset from one another by 90 °.
  • the vibration exciter is at least one vibration magnet
  • the vibration excitation can be induced via a frequency converter and an alternating voltage frequency of 50Hz to 60Hz is converted into an oscillation frequency that can be transferred to the oxygen lance.
  • the vibration exciter it is provided that it is designed 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 can be releasably connected to the coupling device and can be moved freely with or without it parallel to the longitudinal axis of the oxygen lance. Due to the different firmness and strengths (thicknesses) of the fermentation along the oxygen lance, it may be necessary for better cleaning to move the location of the vibration excitation closer to the free end of the oxygen lance (in the direction of the outlet opening and towards the lance head) via the coupling device, if this is completely withdrawn from the converter. Therefore variable positioning of the coupling device is provided.
  • Another object of the present invention is to provide a method according to claim 10 for cleaning oxygen lances with the device according to the invention.
  • the procedure is characterized by the following steps: After the end of the blowing process, the oxygen lance previously treated with the Clean Lance system is moved out of the converter mouth. If the lance head is approx. 1 m above the converter mouth, the oxygen lance movement is stopped.
  • the coupling device is moved up to the oxygen lance in a predetermined position by means of the guide.
  • a gripper that is operatively connected to the coupling device, the coupling device with the vibration exciters assigned to it is coupled 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 sec.
  • An excitation frequency band is passed through, which is variable in its limits depending on the lance geometry, the water column within the oxygen lance, the thickness of the decay and the place of decay.
  • 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 from the vibration (keyword: resonance catastrophe). Otherwise fatigue cracks can occur and, in the worst case, water breakthrough with destruction of the lance and the breaking of the oxygen lance from its suspension.
  • Frequency and amplitude can be adjusted so that the decay can be shaken off.
  • the upper value of the frequency band can therefore go up to the 4th natural frequency of the system, with an amplitude of a maximum of + - 20 mm.
  • the weight of the oxygen lance is approx. 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 oxygen lance itself is moved further upwards and depending on the remaining fermentation, the oxygen lance is stopped again after approx. 1 m - 3 m of travel.
  • the external vibrators are repositioned on the oxygen lance via the grippers, the guide (gripper positioning unit) is moved back and the vibrating process is repeated for max. 15 s started.
  • this process can be repeated several times at different positions on the oxygen lance until the deterioration is reduced or removed accordingly.
  • 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 during the next entry process into the converter.
  • the external vibrator with gripper is decoupled from the guide and the lance finally moves into the converter.
  • Pieces of slag or melt falling during the vibrating process can be collected with the aid of a funnel attached above and around the converter mouth and fed back into the converter.
  • the total shaking time with coupling and uncoupling can be estimated at approx. 2.5 minutes with two coupling and uncoupling (30 s coupling plus 15 s shaking plus 30 s uncoupling, and all of this twice). In comparison, the conventional burning of the fermentation takes about 10 minutes.
  • a supporting measure is provided 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 onto the still clean oxygen lance, which reduces the caking of the fermentation and facilitates its subsequent removal.
  • An additional cooling device can be assigned to the oxygen lance as a further supporting measure for removing the deposits on oxygen lances.
  • the deposits are cooled down to such an extent that they no longer have any ductile areas before the above-mentioned device and the method for this are used. A flaking or detachment of the then more quickly solidified and no longer ductile deposits from the oxygen lance due to vibrations thus becomes even more effective.
  • the coupling device 10 consists essentially of a gripper which can be brought into operative connection with an oxygen lance 13 via actuators 12.
  • the actuators 12 close and open the grippers 11 to such an extent that the oxygen lance 13 can be grasped, held firmly and, conversely, released again, as shown by the semicircular arrow 12a.
  • the vibration exciters 14 are assigned to the coupling device 10 in this embodiment.
  • the vibration exciters 14 can be flanged to the coupling device 10 as so-called external vibrators and can set the oxygen lance 13 in vibration with different frequencies and amplitudes.
  • the different frequency points are in Fig. 1 marked with a corresponding P and can shift laterally, as shown by the double arrows ( ⁇ ) that are assigned to the points P.
  • the vibrations generated by the vibration exciter 14 are linear vibrations that are formed in two directions perpendicular to one another and perpendicular to the longitudinal axis 17 of the oxygen lance 13.
  • the vibration exciters 14 are designed as external vibrators 14a.
  • the oxygen lance 13 is connected to a lifting device 18 by means of which it can be moved vertically, as shown, inter alia, in FIG Fig. 3 and indicated by the vertical arrow ( ⁇ ).
  • the coupling device 10 In order to be able to move the coupling device 10 up to the oxygen lance 13, it can be detachably connected to a guide 15 designed as a gripper positioning unit. With the aid of the lifting device 18, the coupling device 10 can be lifted into the guide 15.
  • the guide 15 is in turn assigned to a receiving means 16 to which it is hinged.
  • the receiving means 16 is, in this embodiment, connected to a foundation (not shown) as a fixed point, so to speak.
  • the task of the guide 15 is to move the coupling device 10 in a horizontal movement towards the oxygen lance 13 and away from it again, as shown by the horizontal arrow ( ⁇ ) assigned to the guide 15.

Landscapes

  • 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)

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 on oxygen lances, with at least one coupling device which can be approached to the oxygen lance by means of a guide and can be brought into operative connection with the oxygen lance via a gripper assigned to the guide.

Metallische und nichtmetallische Anbackungen, sog. Verbärungen, an Sauer-stofflanzen 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 decay, on oxygen lances occur starting from the lance head over a length of up to seven meters upwards. The decay is distributed asymmetrically over the circumference of the lance cross-section through the longitudinal axis and can weigh several tons. It happens that the debris has 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, the risk of water breakthrough increases with water-cooled lances and also makes it impossible to remove the lance from the converter in an emergency and causes total failure of the converter concerned for an indefinite period of time.

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 build-up on the oxygen lances and to simplify their removal, methods are known in which a release agent is sprayed onto the lance before it is introduced into 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 CN 103014226 beschrieben werden. Hierbei wird beim Herausziehen der Lanze aus dem Konverter ein Abstreifer um die Lanze gelegt, der die Verbärungen teilweise abstreifen kann. Nachteilig hierbei ist zum einen, dass der Abstreifer selbst gereinigt werden muss und zum anderen, dass bei Herausziehen und Abstreifen der Verbärungen zusätzlich hohe Lagerkräfte auf die Lanzenaufhängung einwirken.Mechanical wipers are also known, as described in the publication CN 103014226 to be discribed. When pulling the lance out of the converter, a scraper is placed around the lance, which can partially strip off the debris. The disadvantage here is, on the one hand, that the scraper itself has to be cleaned and, on the other hand, that high bearing forces also act on the lance suspension when the roofs are pulled out and stripped off.

Die Druckschrift GB 2 067 259 A offenbart eine Vorrichtung zum Reinigen einer Sauerstofflanze mit einem Paar von sich gegenüberliegenden und auswechselbaren Schaberklingen.The pamphlet GB 2 067 259 A discloses an apparatus for cleaning an oxygen lance having a pair of opposing and replaceable doctor blades.

Aus derFrom the JP S52 84104 AJP S52 84104 A sowie deras well as the JP 2941737 B2JP 2941737 B2 ist es bekannt mittels einer auf die Lanze übertragenen Vibration Anbackungen zu entfernen.it is known to remove caking by means of a vibration transmitted to the lance.

DieThe AT 381 795 BAT 381 795 B offenbart eine Vorrichtung zum Reinigen des Lanzenkopfes, wobei hier ein Fräskopf die Anbackungen an der Stirnseite des Lanzenkopfes abfräst.discloses a device for cleaning the lance head, here a milling head milling off the caking on the front side of the lance head.

Schließlich sei noch auf die DE 10 2010 024035 hingewiesen, die vorschlägt, die Lanze vor dem Einsatz mit einer Beschichtung von Bornitrid oder - carbid zu versehen, um damit Anbackungen zu verhindern. Finally be on that DE 10 2010 024035 pointed out, which suggests providing the lance with a coating of boron nitride or carbide before use in order to prevent caking.

Aus der Druckschrift US 5,152,952 ist ein feststehender Träger bekannt, der Abstreiflippen aufweist und durch die eine Lanze in Längsachsrichtung gezogen werden kann, um die Verbärungen an der Lanzenoberfläche abzustreifen.From the pamphlet U.S. 5,152,952 a fixed carrier is known which has wiper lips and through which a lance can be pulled in the longitudinal axis direction in order to wipe off the deposits on the lance surface.

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 themselves; they have the disadvantage that their service lives are relatively short due to the relatively high level of wear and tear of the mechanically highly stressed stripping means. In addition, maintenance or cleaning by burning off such devices is time-consuming and costly. Burning off larger debris is not without danger even for a cleaning team. Regular manual removal of braces from the lance ties up 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.
Furthermore, the following personal hazards occur when working near a lance dome:
  • Risk of suffocation from inhalation of carbon monoxide
  • Risk of injury from falling slag and melt parts
  • High dust exposure in the immediate vicinity of the converter
  • Risk of injury from deflagration of explosive gases
  • Very high ambient temperatures occur at the lance dome, which in turn leads to high circulatory loads for maintenance personnel and considerably shortens their availability.

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 the object of the present invention to create a device for removing metallic and non-metallic caking on oxygen lances, with which the operating costs can be reduced through longer service lives and the production capacities 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, wobei die vom Schwingungserreger erzeugten Schwingungen lineare Schwingungen sind, die in zwei senkrecht zueinander stehenden Richtungen und senkrecht zur Längsachse der Sauerstofflanze ausbildbar sind. This object is achieved by the features specified in claim 1, in particular in that the coupling device is assigned a vibration exciter with which the oxygen lance, in the operationally connected state, can be made to vibrate, the vibrations generated by the vibration exciter being linear vibrations that split into two directions perpendicular to one another and perpendicular to the longitudinal axis of the oxygen lance can be formed.

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 vibration exciter to be coupled to the oxygen lance should be able to generate as broad a frequency band as possible, since the caking (deposits) along the oxygen lance can have different thicknesses. It must therefore be possible to drive a frequency spectrum which enables the different natural frequencies, even higher order ones, of the system consisting of oxygen lance and baked-on deposits to be approached or passed through. This is also due to the fact that even after each blowing process, the layer thicknesses can differ not only along the oxygen lance, but also at one and the same place on 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 to which at least two centrifugal masses are assigned.

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, the external vibrator is assigned at least two centrifugal masses arranged parallel to one another, which can each be rotated in opposite directions of rotation relative to one another, so that a linear oscillation can be generated that 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 centrifugal masses of the external vibrator, each rotatable in opposite directions, can be arranged offset from one another by 90 °.

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 according to the invention that the vibration exciter is at least one vibration magnet, the vibration excitation can be induced via a frequency converter and an alternating voltage frequency of 50Hz to 60Hz is converted into an oscillation frequency that can be transferred to the oxygen lance. In such an embodiment of the vibration exciter, it is provided that it is designed 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 can be releasably connected to the coupling device and can be moved freely with or without it parallel to the longitudinal axis of the oxygen lance. Due to the different firmness and strengths (thicknesses) of the fermentation along the oxygen lance, it may be necessary for better cleaning to move the location of the vibration excitation closer to the free end of the oxygen lance (in the direction of the outlet opening and towards the lance head) via the coupling device, if this is completely withdrawn from the converter. Therefore variable positioning of the coupling device is provided.

Eine weitere Aufgabe der vorliegenden Erfindung ist es, ein Verfahren gemäß Anspruch 10 für die Reinigung von Sauerstofflanzen mit der erfindungsgemäßen Vorrichtung zur Verfügung zu stellen.Another object of the present invention is to provide a method according to claim 10 for cleaning oxygen lances with the device according to the invention.

Das Verfahren ist durch die folgenden Schritte gekennzeichnet:
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.The procedure is characterized by the following steps:
After the end of the blowing process, the oxygen lance previously treated with the Clean Lance system is moved out of the converter mouth. If the lance head is approx. 1 m above the converter mouth, the oxygen lance movement 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 up to the oxygen lance in a predetermined position by means of the guide. By moving a gripper that is operatively connected to the coupling device, the coupling device with the vibration exciters assigned to it is coupled 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 sec. An excitation frequency band is passed through, which is variable in its limits depending on the lance geometry, the water column within the oxygen lance, the thickness of the decay and the place of decay. 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 from the vibration (keyword: resonance catastrophe). Otherwise fatigue cracks can occur and, in the worst case, water breakthrough with destruction of the lance and the breaking 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 can be adjusted so that the decay can be shaken off. The upper value of the frequency band can therefore go up to the 4th natural frequency of the system, with an amplitude of a maximum of + - 20 mm. The weight of the oxygen lance, depending on the design and length of the lance including the water filling, is approx. 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 moved further upwards and depending on the remaining fermentation, the oxygen lance is stopped again after approx. 1 m - 3 m of 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 repositioned on the oxygen lance via the grippers, the guide (gripper positioning unit) is moved back and the vibrating 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 degree of deterioration, this process can be repeated several times at different positions on the oxygen lance until the deterioration is reduced or removed accordingly.

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 vibrator shortly before moving the oxygen lance out of the converter and to start the vibrating process while the oxygen lance is moving out of 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 during the next entry process into the converter. The external vibrator with gripper is decoupled from the guide and the lance finally moves into 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.Pieces of slag or melt falling during the vibrating process can be collected with the aid of a funnel attached above and around the converter mouth and fed back into 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 total shaking time with coupling and uncoupling can be estimated at approx. 2.5 minutes with two coupling and uncoupling (30 s coupling plus 15 s shaking plus 30 s uncoupling, and all of this twice). In comparison, the conventional burning of the fermentation takes about 10 minutes.

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 approx. 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 above-mentioned embodiments of the device according to the invention, a supporting measure is provided 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 onto the still clean oxygen lance, which reduces the caking of the fermentation and facilitates its 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.An additional cooling device can be assigned to the oxygen lance as a further supporting measure for removing the deposits on oxygen lances. As a result, the deposits are cooled down to such an extent that they no longer have any ductile areas before the above-mentioned device and the method for this are used. A flaking or detachment of the then more quickly solidified and no longer ductile deposits from the oxygen lance due to vibrations thus becomes 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.
The invention is explained in more detail below on the basis of exemplary embodiments with reference to the accompanying drawings. Show it:
Fig. 1
a schematic representation of an embodiment of the coupling device according to the invention with a guide to the horizontal Moving the coupling device towards or away from an oxygen lance, in a side view;
Fig. 2
the schematic representation of the coupling device according to the invention, with the gripper or gripper positioning device assigned to it and corresponding telescopically movable actuators, in operative connection with the oxygen lance in a top view;
Fig. 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 Figuren 1 und 2 zeigen, besteht die erfindungsgemäße Ankopplungsvorrichtung 10 im Wesentlichen aus einem Greifer der über Aktuatoren 12 mit einer Sauerstofflanze 13 in Wirkverbindung bringbar ist. Hierzu schließen und öffnen die Aktuatoren 12 die Greifer 11 soweit, dass die Sauerstofflanze 13 umfassen, festhalten und umgekehrt wieder freigeben können, wie dies durch den halbkreisförmigen Pfeil 12a dargestellt ist.As the Figures 1 and 2 show, the coupling device 10 according to the invention consists essentially of a gripper which can be brought into operative connection with an oxygen lance 13 via actuators 12. For this purpose, the actuators 12 close and open the grippers 11 to such an extent that the oxygen lance 13 can be grasped, held firmly and, conversely, released again, as shown by the semicircular arrow 12a.

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 Fig. 1 mit einem entsprechenden P gekennzeichnet und können sich lateral verschieben, wie dies durch die Doppelpfeile (↔), die den Punkten P zugeordnet sind, dargestellt ist.Furthermore, two vibration exciters 14 are assigned to the coupling device 10 in this embodiment. The vibration exciters 14 can be flanged to the coupling device 10 as so-called external vibrators and can set the oxygen lance 13 in vibration with different frequencies and amplitudes. The different frequency points are in Fig. 1 marked with a corresponding P and can shift laterally, as shown by the double arrows (↔) that are assigned to the points P.

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 vibration exciter 14 are linear vibrations that are formed in two directions perpendicular to one another and perpendicular to the longitudinal axis 17 of the oxygen lance 13. In this embodiment, the vibration exciters 14 are designed as external vibrators 14a.

Die Sauerstofflanze 13 ist mit einer Hebevorrichtung 18 verbunden, über die sie vertikal verfahren werden kann, wie dies unter anderem, in Fig. 3 dargestellt und durch den vertikalen Pfeil (↕) angedeutet wird.The oxygen lance 13 is connected to a lifting device 18 by means of which it can be moved vertically, as shown, inter alia, in FIG Fig. 3 and indicated by the vertical arrow (↕).

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 18 kann die Ankopplungsvorrichtung 10 in die Führung 15 gehoben werden.In order to be able to move the coupling device 10 up to the oxygen lance 13, it can be detachably connected to a guide 15 designed as a gripper positioning unit. With the aid of the lifting device 18, the coupling device 10 can be lifted into the guide 15.

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 guide 15 is in turn assigned to a receiving means 16 to which it is hinged. The receiving means 16 is, in this embodiment, connected to a foundation (not shown) as a fixed point, so to speak.

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 guide 15 is to move the coupling device 10 in a horizontal movement towards the oxygen lance 13 and away from it again, as shown by the horizontal arrow (↔) assigned to the guide 15.

BezugszeichenlisteList of reference symbols

1010
AnkopplungsvorrichtungCoupling device
1111
GreiferGripper
1212
AktuatorenActuators
12a12a
halbkreisförmiger Pfeil (als Symbol für das Öffnen und Schließen der Greifer)semicircular arrow (as a symbol for opening and closing the gripper)
1313
SauerstofflanzeOxygen lance
1414th
SchwingungsanregerVibration exciter
14a14a
AußenrüttlerExternal vibrator
1515th
Führungguide
1616
AufnahmemittelReceiving means
1717th
LängsachseLongitudinal axis
1818th
Hebevorrichtung SauerstofflanzeOxygen lance lifting device

Claims (19)

  1. Device for removing metallic and non-metallic encrustations at an oxygen lance (13), comprising at least one coupling device (10) which can be moved up to the oxygen lance (13) by means of a guide (15) and brought into operative connection with the oxygen lance (13) by way of a gripper (11) associated with the guide (15), characterised in that an oscillation excitation device (14) by which the oxygen lance (13) in the operatively connected state can be set into oscillations is associated with the coupling device (10), wherein the oscillations generated by the oscillation excitation device (14) are linear oscillations which can be formed in two mutually perpendicular directions and perpendicularly to the longitudinal axis (17) of the oxygen lance (12).
  2. Device for removing metallic and non-metallic incrustations at an oxygen lance according to claim 1, characterised in that the frequency at which the oscillation excitation device (14) oscillates is freely settable so that different natural oscillation frequencies of the oxygen lance (13) with the encrustations are usable.
  3. Device for removing metallic and non-metallic incrustations at an oxygen lance according to claim 1, characterised in that the oscillation excitation device (14) is an external vibrator (14a) with at least two centrifugal masses.
  4. Device for removing metallic and non-metallic incrustations at an oxygen lance according to claim 3, characterised in that associated with the external vibrator (14a) are at least two centrifugal masses which are arranged parallel to one another and which are rotatable relative to one another respectively in opposite rotational directions so that a linear oscillation directed perpendicularly to the longitudinal axis (17) of the oxygen lance (13) can thereby be generated.
  5. Device for removing metallic and non-metallic incrustations at an oxygen lance according to claim 4, characterised in that the at least two centrifugal masses, which are configured to be respectively rotatable in opposite direction, of the external vibrator (14a) are arranged to be offset by 90° relative to one another.
  6. Device for removing metallic and non-metallic incrustations at an oxygen lance according to one of the preceding claims 1 and 2, characterised in that the oscillation excitation device (14) is at least one oscillation magnet and the oscillation excitation can be induced by way of a frequency converter by which an alternative voltage frequency of 50 Hz to 60 Hz can be converted into an oscillation frequency which is transmissible to the oxygen lance (13).
  7. Device for removing metallic and non-metallic incrustations at an oxygen lance according to any one of the preceding claims 1 to 3, characterised in that the oscillation excitation device (14) is an internal vibrator by way of which the water column for cooling within the oxygen lance (13) can be excited to oscillate.
  8. Device for removing metallic and non-metallic incrustations at an oxygen lance according to claim 7, characterised in that the coupling device (10) is freely movable axially parallel to the oxygen lance (13).
  9. Device for removing metallic and non-metallic incrustations at an oxygen lance according to claim 7, characterised in that the guide (15) is detachably connectible with the coupling device (10) and is constructed to be freely movable parallel to the longitudinal axis (17) of the oxygen lance (13).
  10. Method of removing metallic and non-metallic incrustations at an oxygen lance by a device according to claims 1 to 9, characterised in that after the end of the blowing process the oxygen lance previously manipulated by separating means is moved out of the converter mouth, the movement out is stopped when the oxygen lance head is disposed at least 1 metre above the converter mouth, and through movement up of the coupling device by means of a guide into a predetermined position at the oxygen lance and through movement forward of a gripper operatively connected with the coupling device the coupling of the coupling device by the oscillation excitation device associated therewith to the oxygen lance itself then takes place.
  11. Method of removing metallic and non-metallic incrustations at an oxygen lance according to claim 10, characterised in that the guide is separated from the gripper and moved horizontally back away from the oxygen lance.
  12. Method of removing metallic and non-metallic incrustations at an oxygen lance according to claim 11, characterised in that the shaking process is started and depending on the encrustation thickness is maintained for up to 15 seconds and in that case an excitation frequency band is traversed which is formed to be variable depending on the lance geometry, the water column within the oxygen lance, the encrustation thickness and the encrustation location and the amplitudes of the oxygen lance deflections are as small as possible so as to avoid damage to itself due to excessively high mechanical loading of the oxygen lance by the vibration.
  13. Method of removing metallic and non-metallic incrustations at an oxygen lance according to claim 12, characterised in that the frequency and the amplitude are set so that a shaking off of the encrustation can take place, wherein the upper value of the frequency band can therefore rise up to 4 times the natural frequency of the system at an amplitude of at most +- 20 millimetres.
  14. Method of removing metallic and non-metallic incrustations at an oxygen lance according to claim 13, characterised in that after the shaking process the coupling device and the oscillation excitation devices are reconnected with the guide and separated by way of this from the oxygen lance and moved back again by means of the docked guide (gripper positioning unit).
  15. Method of removing metallic and non-metallic incrustations at an oxygen lance according to claim 14, characterised in that subsequently the oxygen lance itself is moved upwardly again and depending on residual encrustation the oxygen lance is stopped again after a travel path of 1 metre to 3 metres.
  16. Method of removing metallic and non-metallic incrustations at an oxygen lance according to claim 15, characterised in that the oscillation excitation devices are then positioned by way of the gripper of the guide back at the oxygen lance, the guide is thereafter moved back again (gripper positioning unit) and the shaking process is started again for at most 15 seconds.
  17. Method of removing metallic and non-metallic incrustations at an oxygen lance according to claim 16, characterised in that depending on the encrustation thickness this process is repeated several times at different positions of the oxygen lance until the encrustation is appropriately reduced or removed.
  18. Method of removing metallic and non-metallic incrustations at an oxygen lance according to claim 17, characterised in that shortly before movement of the oxygen lance out of the converter the coupling device is coupled with its oscillation excitation devices and the shaking process is already started during the movement of the oxygen lance out of the converter until the oxygen lance has reached its end position and the oscillation excitation devices are switched off.
  19. Method of removing metallic and non-metallic incrustations at an oxygen lance according to claim 18, characterised in that the coupling device with the oscillation excitation devices remains positioned at the oxygen lance without shaking until at the next entry process into the converter the oxygen lance is stopped at the level of the guide unit and the coupling device with the gripper is decoupled from the guide and the lance is finally moved back into the converter.
EP17197866.1A 2016-10-25 2017-10-23 Device and method for removing metallic and non-metallic adhering material from injection lances when using a converter Active EP3315616B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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
EP3315616A1 EP3315616A1 (en) 2018-05-02
EP3315616B1 true EP3315616B1 (en) 2020-08-19

Family

ID=60327036

Family Applications (1)

Application Number Title Priority Date Filing Date
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

Country Status (2)

Country Link
EP (1) EP3315616B1 (en)
DE (1) DE102016120334A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Family Cites Families (7)

* Cited by examiner, † Cited by third party
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
GB2067259B (en) 1980-01-15 1984-05-23 Mckee Minerals & Metals Ltd Da Gas lance cleaning device
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
FR2667326B1 (en) 1990-09-27 1992-11-13 Unimetall Sa DEVICE FOR SCRAPING A SPEAR FOR INTRODUCING INTO A METALLURGICAL CONTAINER.
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
CN103014226B (en) 2012-11-28 2014-04-02 夏俊双 Automatically cleaning apparatus of converter oxygen lance bonded slag

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3315616A1 (en) 2018-05-02
DE102016120334A1 (en) 2018-05-09

Similar Documents

Publication Publication Date Title
EP3315616B1 (en) Device and method for removing metallic and non-metallic adhering material from injection lances when using a converter
DE2723547C2 (en) Device for removing the slag deposits and infiltrated inner surface layers on melting or pouring vessels
DE3728687C2 (en)
DE3410981C1 (en) Method and device for cutting rock
WO2012097850A1 (en) Method for ballast tamping a railway track
WO2011012595A1 (en) Device for tipping a metallurgical melt vessel, metallurgical melting arrangement, and method using such a melting arrangement
DE2822138A1 (en) OSCILLATION DEVICE FOR A CONTINUOUS CASTING CLOSURE
EP3019432B1 (en) Apparatus for lifting a ladle and setting same down again, plant having such an apparatus, and method
DE2702267A1 (en) CONTINUOUS CASTING PROCESS AND DEVICE FOR CARRYING OUT THE PROCESS AND CAST BLOCK MANUFACTURED BY THE PROCESS
CH656330A5 (en) Device for corrosion-protective treatment
EP1970455A1 (en) Process and apparatus for dry treatment of all kinds of slags, from low viscosity to pasty
WO2015118050A1 (en) Ingot mould arrangement for continuous casting of metallic products
EP3197618B1 (en) Method for quickly converting a single-train continuous casting plant for slabs into a multi-train continuous casting plant for billets, and vice versa
EP2790855B1 (en) Method for maintaining and/or repairing the spout area of a metallurgical vessel
EP1103325A1 (en) Process and device for cleaning cast copper anodes from encrustations of lime and barite
DE102005040966A1 (en) Handling unit and operating module for a moulding machine, comprises a common manipulator
DE3304391A1 (en) Method for separating cable metal from insulation
DE3424000A1 (en) Method and apparatus for the removal of sand from castings
DE2914686A1 (en) Removing worn refractory linings and/or slag deposits - from long vessels, esp. torpedo transporter:mixers for molten iron, where lining is cut, and then shattered by vibration
DE10260664B4 (en) Crane-type, hydraulic pusher device for cleaning rotary kiln interior walls
DD297229A5 (en) METHOD AND DEVICE FOR DISMANTLING SEAMED OVEN LIGHTS
EP3885060A1 (en) Continuous casting plant and method of operating the continuous casting plant
WO2013041683A1 (en) Device for removing chips and method for producing a transmission component
DE1608344C3 (en) Channel iron crusher on a centrifugal casting machine
DE2122667A1 (en) High tension discharge cleaning plant - for sand castings

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20171023

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20180614

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20200323

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502017006791

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1304006

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200915

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: NL

Ref legal event code: FP

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201119

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201119

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201221

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201120

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201219

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502017006791

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201023

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20201031

26N No opposition filed

Effective date: 20210520

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201031

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201031

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201031

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201023

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20211023

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200819

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20211023

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230707

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20231019

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20231020

Year of fee payment: 7

Ref country code: AT

Payment date: 20231020

Year of fee payment: 7