EP1080236A1 - Variably insertable combined lance with displaceable burner and blower lance bodies - Google Patents

Variably insertable combined lance with displaceable burner and blower lance bodies

Info

Publication number
EP1080236A1
EP1080236A1 EP99927699A EP99927699A EP1080236A1 EP 1080236 A1 EP1080236 A1 EP 1080236A1 EP 99927699 A EP99927699 A EP 99927699A EP 99927699 A EP99927699 A EP 99927699A EP 1080236 A1 EP1080236 A1 EP 1080236A1
Authority
EP
European Patent Office
Prior art keywords
lance
lance body
burner
mouth
cooling jacket
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
Application number
EP99927699A
Other languages
German (de)
French (fr)
Other versions
EP1080236B1 (en
Inventor
Friedhelm Wagener
Arno Luven
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.)
SIEMENS VAI METALS TECHNOLOGIES GmbH
Original Assignee
Technometal Gesellschaft fuer Metalltechnologie mbH
VAI Fuchs 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 Technometal Gesellschaft fuer Metalltechnologie mbH, VAI Fuchs GmbH filed Critical Technometal Gesellschaft fuer Metalltechnologie mbH
Publication of EP1080236A1 publication Critical patent/EP1080236A1/en
Application granted granted Critical
Publication of EP1080236B1 publication Critical patent/EP1080236B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/168—Introducing a fluid jet or current into the charge through a lance

Definitions

  • the invention relates to a lance for treating liquid metal melts located in metallurgical vessels, in particular steel exposed to a vacuum in RH vessels and for heating the RH vessels before or between the treatment phases
  • the inner guide tube for guiding gases, in particular oxygen has a head-end lance mouth for inflating the gas and has a first cooling jacket over its entire length and is connected at the foot to a gas and cooling media supply
  • the lance for performing a burner function on the outer circumference of the first cooling jacket arranged channels for passing a fuel gas to im Has area of the head-end lance mouth formed, obliquely aligned to the lance axis burner nozzles and the fuel gas channels are enclosed by a second outer cooling jacket.
  • a lance for treating metal melts with the aforementioned features is described in DE 44 42 362 Cl.
  • the multi-function lance known from this already allows the process steps of inflating oxygen with and without solids as well as generating a burner flame to heat the vessel independently of one another.
  • oxygen is blown up, the oxygen is blown up via the inner guide tube provided with a lavai-shaped lance mouth, while fuel gas is supplied to the fuel gas channels during burner operation, so that a combustion reaction occurs in the area of the lance mouth together with the oxygen still escaping there during burner operation to form the desired flame.
  • the known multi-function lance has the disadvantage that during the oxygen blowing process and during the subsequent low-vacuum treatment, splashes of slag and / or metal occur due to the sometimes violent reaction of the metal melt to be treated, so that the burner nozzles located at the end of the multi-function lance become clogged and so far are no longer available for a subsequent burner operation. In order to avoid this, it is known to keep the burner nozzles free during the entire process by means of an inert gas introduced into the combustion gas channels, which is correspondingly expensive.
  • the invention is therefore based on the object of providing a lance with the features mentioned at the outset, in which both oxygen blowing mode and burner mode are provided independently of one another is, like the burner nozzles, protected against clogging by material splashes, without the need to apply inert gas to the burner nozzles.
  • the invention provides in its basic concept that the inner guide tube are formed with first cooling jacket as a first lance body and the combustible gas ducts with second cooling jacket as a second lance body and the first lance body in the second lance body between a 'raised burner operating position and a lowered blowing position slidably disposed in which the burner nozzles are covered by the first lance body, which projects downward over the end of the second lance body.
  • the invention has the advantage that the lance can be converted from the oxygen blowing function into the burner function by simply moving the first lance body in the second lance body, the second lance body having the burner nozzles being covered so far by the first lance body during the oxygen blowing operation that the first lance body completely covers the burner nozzles directed obliquely to its longitudinal axis and mechanically protects them from the action of material splashes. An easy-to-use, effective protection of the burner nozzles is thus achieved.
  • Another advantage is the existing, so far only for the Lances set up by oxygen blowing operation can be retrofitted by means of a second lance body to be pushed onto them and can be made available as a combination lance for blowing and burner operation.
  • the second lance body surrounds the first lance body in a ring, so that burner and blow lance operation can be carried out concentrically to the RH vessel axis.
  • the first lance body in the second lance body is steplessly displaceable to set a variable distance of the burner nozzles from the burner mouth of the second lance body.
  • This has the particular advantage that, due to the variably adjustable distance of the burner nozzles to the lance mouth for the oxygen outlet, an optimal combustion of the introduced fuel gas can be set up. Since only about 1/5 to 1/10 of the amount of oxygen has to be passed through the inner guide tube of the lance in the burner operation, as compared to the oxygen blowing operation, the Laval nozzle formed in the area of the lance mouth is ineffective, so that completely different discharge conditions of the Result in oxygen in comparison with the oxygen blowing operation.
  • the first lance body can be moved by a lifting device attached to the second lance body.
  • the second lance body can be made correspondingly shorter.
  • the second lance body extends over the entire length of the first lance body and separately arranged lifting devices are provided for the first lance body and the second lance body.
  • both lance bodies are guided through the stuffing box arranged in the cover of the treatment vessel, so that the corresponding lifting devices take over the distance control of the two lance heads during burner operation.
  • FIG. 1 shows a variable combi-lance in side view with an enlarged sectional view in the foot region thereof in the case of oxygen blowing operation
  • Fig. 2 shows the variable combination lance according to Figure 1 in the position during burner operation.
  • the combination lance initially has a first lance body 10, which extends over the entire length of the lance and has an inner guide tube 11 for the passage of, in particular, oxygen for the treatment of the molten metal.
  • a Laval nozzle 12 At the free end of the first lance body 10 there is a Laval nozzle 12, via which the oxygen is blown onto the bath surface.
  • the first lance body 10 has an oxygen connection 13 at its upper end.
  • the inner guide tube 11 is enclosed by a first cooling jacket 14, to which a cooling water inlet 15 and a cooling water outlet 16 are assigned in the upper region of the first lance body 10.
  • the first lance body 10 is displaceably arranged in the second lance body 17, the second lance body 17 or its cooling jacket 20 enclosing the first lance body in a ring shape.
  • Fuel gas channels 18 are formed in the second lance body 17 and open at the lower end thereof into burner nozzles 19 arranged obliquely to the longitudinal axis of the lance.
  • the second lance body 17 has an outer second cooling jacket 20, to which a water inlet 21 and a water outlet 22 are assigned.
  • the fuel gas channels 18 are connected to a fuel gas supply 23.
  • Both lance bodies 10, 17 are guided together through a stuffing box (not shown in the drawing) in the lid of the RH treatment vessel, this lance unit at the beginning or at the end of an oxygen blowing or burner operation over a 4 to 5 m long, vertical travel path into the upper parking position or the lower operating position can be moved by means of a lifting device, not shown in the drawing.
  • the second lance body 17 is connected to the outer tube of the cooling jacket 20 and a lance slide of the lifting device (not shown in the drawing) via a clamp connection.
  • both lance bodies 10, 17 can be displaced relative to one another and thereby an annular gap is formed between the outer jacket of the first lance body 10 and the inner jacket of the second lance body 17, a vacuum-tight stuffing box 28 surrounding the lance body 10 is arranged at the upper end of the lance body 17.
  • a flange 25 is arranged on the second lance body 17, on which two hydraulic cylinders 26 engage, which carry the first lance body 10 connected via an associated flange 24, so that the cylinder 26 is connected to the second lance body 10 outgoing drive the first lance body 10 is arranged displaceably in the second lance body 17.
  • the first lance body 10 is in the “lowered” position, in which the end of the first lance body 10 is aligned with the end of the second lance body 17, so that the lance mouth 27 for blowing out the Oxygen from the inner guide tube 11 or the associated Laval nozzle 12 is given.
  • the burner nozzles 19 are completely covered by the first lance body 10, so that any material that may be sprayed on cannot reach the burner nozzles 19.
  • the burner nozzles 19 are released in the second lance body 17, so that when oxygen continues to escape, a reaction of fuel gas with oxygen occurs in the area of the lance mouth 27 and the desired burner flame is thus obtained is coming.
  • the distance between the burner nozzles 19 and the oxygen outlet from the lance mouth 27 can be continuously adjusted via the cylinders 26, so that an optimal control of the combustion reaction is possible.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Gas Burners (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Feeding And Controlling Fuel (AREA)

Abstract

A lance is provided for processing molten metal baths located in metallurgical tanks, and for heating the tanks. A first lance body is displaceable in a second lance body. A mechanism is provided for displacing the first lance body relative to the second lance body such that in a raised burner position of the first lance body, burner nozzles disposed in the second lance body are uncovered by the first lance body and are axially spaced from the lance mouth of the first lance body to receive gas discharge from the lance mouth and to allow burner operation. In a lowered blower position of the first lance body, the burner nozzles are covered thereby. The mechanism for displacing the lance bodies relative to one another permits infinitely variable spacing of the burner nozzles from the lance mouth that is provided for the discharge of gas.

Description

VARIABEL EINSETZBARE KOMBILANZE MIT VERSCHIEBBAREN BRENNER- UND BLASLANZENKÖRPERN VARIABLE INSERTABLE COMBINANCE WITH SLIDING BURNER AND BLOWING BODIES
B e s c h r e i b u n gDescription
Die Erfindung betrifft eine Lanze zum Behandeln von in metallurgischen Gefäßen befindlichen flüssigen Metallschmelzen, insbesondere von einem Vakuum ausgesetztem Stahl in RH-Gefäßen sowie zum Heizen der RH-Gefäße vor oder zwischen den Behandlungsphasen, die ein inneres Leitrohr zum Führen von Gasen, insbesondere Sauerstoff, mit einer kopfendigen Lanzenmündung zum Aufblasen des Gases besitzt und über ihre Gesamtlänge einen ersten Kühlmantel aufweist und fußendig an eine Gas- und Kühlmedienversorgung angeschlossen ist, wobei die Lanze zur Ausführung einer Brennerfunktion auf dem äußeren Umfang des ersten Kühlmantels angeordnete Kanäle zur Durchleitung eines Brenngases zu im Bereich der kopfendigen Lanzenmündung ausgebildeten, schräg zur Lanzenachse ausgerichteten Brennerdüsen aufweist und die Brenngaskanäle von einem zweiten äußeren Kühlmantel umschlossen sind. Eine Lanze zum Behandeln von Metallschmelzen mit den vorgenannten Merkmalen ist in der DE 44 42 362 Cl beschrieben. Die daraus bekannte Multifunktionslanze erlaubt bereits unabhängig voneinander die Verfahrensschritte Aufblasen von Sauerstoff mit und ohne Feststoff sowie das Erzeugen einer Brennerflamme zum Aufheizen des Gefäßes. Beim Aufblasen von Sauerstoff wird über das innere, mit einer lavai-förmigen Lanzenmündung versehene Leitrohr der Sauerstoff aufgeblasen, während im Brennerbetrieb die Brenngaskanäle mit Brenngas beaufschlagt werden, so daß sich im Bereich der Lanzenmündung gemeinsam mit dem dort auch im Brennerbetrieb weiterhin austretenden Sauerstoff eine Verbrennungsreaktion unter Bildung der gewünschten Flamme einstellt.The invention relates to a lance for treating liquid metal melts located in metallurgical vessels, in particular steel exposed to a vacuum in RH vessels and for heating the RH vessels before or between the treatment phases, the inner guide tube for guiding gases, in particular oxygen, has a head-end lance mouth for inflating the gas and has a first cooling jacket over its entire length and is connected at the foot to a gas and cooling media supply, the lance for performing a burner function on the outer circumference of the first cooling jacket arranged channels for passing a fuel gas to im Has area of the head-end lance mouth formed, obliquely aligned to the lance axis burner nozzles and the fuel gas channels are enclosed by a second outer cooling jacket. A lance for treating metal melts with the aforementioned features is described in DE 44 42 362 Cl. The multi-function lance known from this already allows the process steps of inflating oxygen with and without solids as well as generating a burner flame to heat the vessel independently of one another. When oxygen is blown up, the oxygen is blown up via the inner guide tube provided with a lavai-shaped lance mouth, while fuel gas is supplied to the fuel gas channels during burner operation, so that a combustion reaction occurs in the area of the lance mouth together with the oxygen still escaping there during burner operation to form the desired flame.
Mit der bekannten Multifunktionslanze ist der Nachteil verbunden, daß während des Sauerstoffblasprozesses und während der daran anschließenden Tiefvakuumbehandlung aufgrund der teils heftigen Reaktion der zu behandelnden Metallschmelze es zu Spritzern an Schlacke und/oder Metall kommt, so daß sich die am Ende der Multifunktionslanze befindlichen Brennerdüsen zusetzen und insoweit für einen nachfolgenden Brennerbetrieb nicht mehr zur Verfügung stehen. Um dies zu vermeiden, ist es bekannt, während des gesamten Prozesses die Brennerdüsen mittels eines in die Brenngaskanäle eingebrachten Inertgases freizuhalten, was entsprechend kostenaufwendig ist.The known multi-function lance has the disadvantage that during the oxygen blowing process and during the subsequent low-vacuum treatment, splashes of slag and / or metal occur due to the sometimes violent reaction of the metal melt to be treated, so that the burner nozzles located at the end of the multi-function lance become clogged and so far are no longer available for a subsequent burner operation. In order to avoid this, it is known to keep the burner nozzles free during the entire process by means of an inert gas introduced into the combustion gas channels, which is correspondingly expensive.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Lanze mit den eingangs genannten Merkmalen zur Verfügung zu stellen, bei der sowohl unabhängig voneinander ein Sauerstoffblasbetrieb als auch ein Brennerbetrieb gegeben ist wie auch die Brennerdüsen gegen eine Verstopfung durch Materialspritzer geschützt sind, ohne daß hierfür die Brennerdüsen mit Inertgas beaufschlagt werden müssen.The invention is therefore based on the object of providing a lance with the features mentioned at the outset, in which both oxygen blowing mode and burner mode are provided independently of one another is, like the burner nozzles, protected against clogging by material splashes, without the need to apply inert gas to the burner nozzles.
Die Lösung dieser Aufgabe ergibt sich einschließlich vorteilhafter Ausgestaltungen und Weiterbildungen der Erfindung aus dem Inhalt der Patentansprüche, welche dieser Beschreibung nachgestellt sind.This object is achieved, including advantageous refinements and developments of the invention, from the content of the patent claims, which follow this description.
Die Erfindung sieht in ihrem Grundgedanken vor, daß das innere Leitrohr mit erstem Kühlmantel als ein erster Lanzenkörper und die Brenngaskanäle mit zweitem Kühlmantel als ein zweiter Lanzenkörper ausgebildet sind und der erste Lanzenkörper in dem zweiten Lanzenkörper zwischen einer ' angehobenen Brennerfunktionsstellung und einer abgesenkten Blasstellung verschiebbar angeordnet ist, in welcher die Brennerdüsen durch den das Ende des zweiten Lanzenkörpers nach unten überragenden ersten Lanzenkörper abgedeckt sind.The invention provides in its basic concept that the inner guide tube are formed with first cooling jacket as a first lance body and the combustible gas ducts with second cooling jacket as a second lance body and the first lance body in the second lance body between a 'raised burner operating position and a lowered blowing position slidably disposed in which the burner nozzles are covered by the first lance body, which projects downward over the end of the second lance body.
Mit der Erfindung ist der Vorteil verbunden, daß die Lanze durch einfaches Verschieben des ersten Lanzenkörpers in dem zweiten Lanzenkörper von der Sauerstoffblasfunktion in die Brennerfunktion überführbar ist, wobei während des Sauerstoffblasbetriebs der die Brennerdüsen aufweisende zweite Lanzenkörper so weit von dem ersten Lanzenkörper überdeckt wird, daß der erste Lanzenkörper die schräg zu seiner Längsachse gerichteten Brennerdüsen vollständig abdeckt und mechanisch vor der Einwirkung von Materialspritzern schützt. Damit ist ein einfach zu handhabender, wirksamer Schutz der Brennerdüsen verwirklicht. Als weiterer Vorteil ist zu nennen, das bestehende, bisher ausschließlich für den Sauerstoffblasbetrieb eingerichtete Lanzen mittels eines darauf aufzuschiebenden zweiten Lanzenkörpers nachgerüstet und insoweit als Kombilanze für den Blas- und Brennerbetrieb zur Verfügung gestellt werden können.The invention has the advantage that the lance can be converted from the oxygen blowing function into the burner function by simply moving the first lance body in the second lance body, the second lance body having the burner nozzles being covered so far by the first lance body during the oxygen blowing operation that the first lance body completely covers the burner nozzles directed obliquely to its longitudinal axis and mechanically protects them from the action of material splashes. An easy-to-use, effective protection of the burner nozzles is thus achieved. Another advantage is the existing, so far only for the Lances set up by oxygen blowing operation can be retrofitted by means of a second lance body to be pushed onto them and can be made available as a combination lance for blowing and burner operation.
Dabei ist nach einem Ausführungsbeispiel der Erfindung vorgesehen, daß der zweite Lanzenkörper den ersten Lanzenkörper ringförmig umschließt, so daß Brenner - als auch Blaslanzenbetrieb konzentrisch zur RH-Gefäßachse durchgeführt werden können.It is provided according to an embodiment of the invention that the second lance body surrounds the first lance body in a ring, so that burner and blow lance operation can be carried out concentrically to the RH vessel axis.
Nach einer Ausführungsform der Erfindung ist weiterhin vorgesehen, daß der erste Lanzenkörper in dem zweiten Lanzenkörper zur Einstellung eines variablen Abstandes der Brennerdüsen von der Brennermündung des zweiten Lanzenkörpers stufenlos verschiebbar ist. Hiermit ist der besondere Vorteil verbunden, daß aufgrund des variabel einzustellenden Abstandes der Brennerdüsen zu der Lanzenmündung für den Sauerstoffaustritt eine optimale Verbrennung des eingeleiteten Brenngases eingerichtet werden kann. Da beim Brennerbetrieb in der Regel im Vergleich mit dem Sauerstoffblasbetrieb nur etwa 1/5 bis 1/10 der Sauerstoffmenge durch das innere Leitrohr der Lanze geleitet werden muß, ist die im Bereich der Lanzenmündung ausgebildete Lavaldüse wirkungslos, so daß sich hier völlig andere Auströmverhältnisse des Sauerstoffes im Vergleich mit dem Sauerstoffblasbetrieb ergeben. Dem kann durch die Einstellung eines optimalen Abstandes der Brennerdüsen von der Lanzenmündung unter Berücksichtigung des stöchiometrischen Verhältnisses von Sauerstoff zu Brenngas Rechnung getragen werden. Da mit der Reaktion des Brenngases mit dem Sauerstoff die Entstehung nicht unerheblicher Wasseranteile einhergeht, kann mit der Optimierung des Abstandes der Brenndüsen von dem Ort des Austritts des Sauerstoffes der beim Heizvorgang zwangsläufig auftretende Wasserwert abgesenkt werden.According to one embodiment of the invention, it is further provided that the first lance body in the second lance body is steplessly displaceable to set a variable distance of the burner nozzles from the burner mouth of the second lance body. This has the particular advantage that, due to the variably adjustable distance of the burner nozzles to the lance mouth for the oxygen outlet, an optimal combustion of the introduced fuel gas can be set up. Since only about 1/5 to 1/10 of the amount of oxygen has to be passed through the inner guide tube of the lance in the burner operation, as compared to the oxygen blowing operation, the Laval nozzle formed in the area of the lance mouth is ineffective, so that completely different discharge conditions of the Result in oxygen in comparison with the oxygen blowing operation. This can be taken into account by setting an optimal distance of the burner nozzles from the lance mouth, taking into account the stoichiometric ratio of oxygen to fuel gas. Because with the reaction of the fuel gas with the oxygen the emergence not inconsiderable proportions of water, the optimization of the distance between the fuel nozzles and the location where the oxygen escapes can lower the water value that inevitably occurs during the heating process.
Hinsichtlich der Hubbefestigung des ersten Lanzenkörpers und dessen Verschiebbarkeit in dem zweiten Lanzenkörper kann vorgesehen sein, daß der erste Lanzenkörper von einer an dem zweiten Lanzenkörper angeschlagenen Hubvorrichtung bewegbar ist. Bei dieser Ausführung kann der zweite Lanzenkörper entsprechend kürzer ausgebildet werden.With regard to the lifting attachment of the first lance body and its displaceability in the second lance body, it can be provided that the first lance body can be moved by a lifting device attached to the second lance body. In this embodiment, the second lance body can be made correspondingly shorter.
Alternativ kann vorgesehen sein, daß der zweite Lanzenkörper sich über die gesamte Länge des ersten Lanzenkörpers erstreckt und getrennt angeordnete Hubvorrichtungen für den ersten Lanzenkörper und den zweiten Lanzenkörper vorgesehen sind. In diesem Fall sind beide Lanzenkörper durch die im Deckel des Behandlungsgefäßes angeordnete Stopfbuchse geführt, so daß die entsprechenden Hubvorrichtungen hier die Abstandsregelung der beiden Lanzenköpfe beim Brennerbetrieb übernehmen.Alternatively, it can be provided that the second lance body extends over the entire length of the first lance body and separately arranged lifting devices are provided for the first lance body and the second lance body. In this case, both lance bodies are guided through the stuffing box arranged in the cover of the treatment vessel, so that the corresponding lifting devices take over the distance control of the two lance heads during burner operation.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung wiedergegeben, welches nachstehend beschrieben ist. Es zeigen:In the drawing, an embodiment of the invention is shown, which is described below. Show it:
Fig. 1 eine variable Kombi-Lanze in Seitenansicht mit einer in deren Fußbereich vergrößerten Schnittansicht bei Sauerstoffblasbetrieb, Fig. 2 die variable Kombi-Lanze gemäß Figur 1 in der Stellung bei Brennerbetrieb.1 shows a variable combi-lance in side view with an enlarged sectional view in the foot region thereof in the case of oxygen blowing operation, Fig. 2 shows the variable combination lance according to Figure 1 in the position during burner operation.
Wie sich aus den Figuren entnehmen läßt, weist die Kombilanze zunächst einen ersten Lanzenkörper 10 auf, der sich über die gesamte Länge der Lanze erstreckt und ein inneres Leitrohr 11 zur Durchleitung von insbesondere Sauerstoff für die Behandlung der Metallschmelze aufweist. An dem freien Ende des ersten Lanzenkörpers 10 befindet sich eine Lavaldüse 12, über welche der Sauerstoff auf die Badoberfläche geblasen wird. An seinem oberen Ende weist der erste Lanzenkörper 10 einen Sauerstoffanschluß 13 auf.As can be seen from the figures, the combination lance initially has a first lance body 10, which extends over the entire length of the lance and has an inner guide tube 11 for the passage of, in particular, oxygen for the treatment of the molten metal. At the free end of the first lance body 10 there is a Laval nozzle 12, via which the oxygen is blown onto the bath surface. The first lance body 10 has an oxygen connection 13 at its upper end.
Zur Kühlung des ersten Lanzenkörpers 10 ist das innere Leitrohr 11 von einem ersten Kühlmantel 14 umschlossen, dem im oberen Bereich des ersten Lanzenkörpers 10 ein Kühlwassereintritt 15 und ein Kühlwasseraustritt 16 zugeordnet sind.To cool the first lance body 10, the inner guide tube 11 is enclosed by a first cooling jacket 14, to which a cooling water inlet 15 and a cooling water outlet 16 are assigned in the upper region of the first lance body 10.
In dem zweiten Lanzenkörper 17 verschiebbar angeordnet ist der erste Lanzenkörper 10, wobei der zweite Lanzenkörper 17 bzw. dessen Kühlmantel 20 ringförmig den ersten Lanzenkörper umschließt. In dem zweiten Lanzenkörper 17 sind Brenngaskanäle 18 ausgebildet, die an dessen unteren Ende in schräg zur Längsachse der Lanze angeordnete Brennerdüsen 19 münden. Der zweite Lanzenkörper 17 weist einen äußeren zweiten Kühlmantel 20 auf, dem ein Wassereintritt 21 und ein Wasseraustritt 22 zugeordnet sind. Die Brenngaskanäle 18 sind an eine Brenngaszufuhr 23 angeschlossen. Beide Lanzenkörper 10, 17 werden gemeinsam durch eine in der Zeichnung im einzelnen nicht dargestellte Stopfbuchse im Deckel des RH-Behandlungsgefäßes geführt, wobei diese Lanzeneinheit zu Beginn oder am Ende eines Sauerstoffblasoder Brennerbetriebes über einen ca. 4 bis 5 m langen, vertikalen Verfahrweg in die obere Parkposition oder die untere Betriebsposition mittels einer in der Zeichnung nicht dargestellten Hubvorrichtung gefahren werden. Der zweite Lanzenkörper 17 ist hierbei mit dem äußeren Rohr des Kühlmantels 20 und einem in der Zeichnung nicht weiter dargestellten Lanzenschlitten der Hubvorrichtung über eine Klemmverbindung verbunden.The first lance body 10 is displaceably arranged in the second lance body 17, the second lance body 17 or its cooling jacket 20 enclosing the first lance body in a ring shape. Fuel gas channels 18 are formed in the second lance body 17 and open at the lower end thereof into burner nozzles 19 arranged obliquely to the longitudinal axis of the lance. The second lance body 17 has an outer second cooling jacket 20, to which a water inlet 21 and a water outlet 22 are assigned. The fuel gas channels 18 are connected to a fuel gas supply 23. Both lance bodies 10, 17 are guided together through a stuffing box (not shown in the drawing) in the lid of the RH treatment vessel, this lance unit at the beginning or at the end of an oxygen blowing or burner operation over a 4 to 5 m long, vertical travel path into the upper parking position or the lower operating position can be moved by means of a lifting device, not shown in the drawing. The second lance body 17 is connected to the outer tube of the cooling jacket 20 and a lance slide of the lifting device (not shown in the drawing) via a clamp connection.
Da beide Lanzenkörper 10, 17 gegeneinander verschiebbar sind und hierdurch zwischen dem äußeren Mantel des ersten Lanzenkörpers 10 und dem inneren Mantel des zweiten Lanzenkörpers 17 ein Ringspalt entsteht, ist am oberen Ende des Lanzenkörpers 17 eine vakuumdichte, den Lanzenkörper 10 umschließende Stopfbuchse 28 angeordnet.Since both lance bodies 10, 17 can be displaced relative to one another and thereby an annular gap is formed between the outer jacket of the first lance body 10 and the inner jacket of the second lance body 17, a vacuum-tight stuffing box 28 surrounding the lance body 10 is arranged at the upper end of the lance body 17.
Zur Halterung des ersten Lanzenkörpers 10 auf dem zweiten Lanzenkörper 17 ist an dem zweiten Lanzenkörper 17 ein Flansch 25 angeordnet, an welchem zwei Hydraulikzylinder 26 angreifen, die den über einen zugeordneten Flansch 24 angeschlossenen ersten Lanzenkörper 10 tragen, so daß über den von den Zylindern 26 ausgehenden Antrieb der erste Lanzenkörper 10 in dem zweiten Lanzenkörper 17 verschiebbar angeordnet ist. In der in Figur 1 dargestellten Stellung befindet sich der erste Lanzenkörper 10 in der „abgesenkten" Stellung, in welcher das Ende des ersten Lanzenkörpers 10 mit dem Ende des zweiten Lanzenkörpers 17 fluchtet, so daß die Lanzenmündung 27 zum Ausblasen des Sauerstoffes aus dem inneren Leitrohr 11 bzw. der zugeordneten Lavaldüse 12 gegeben ist. In dieser Stellung sind die Brennerdüsen 19 durch den ersten Lanzenkörper 10 vollständig abgedeckt, so daß eventuell aufspritzende Materialanteile die Brennerdüsen 19 nicht erreichen können.To hold the first lance body 10 on the second lance body 17, a flange 25 is arranged on the second lance body 17, on which two hydraulic cylinders 26 engage, which carry the first lance body 10 connected via an associated flange 24, so that the cylinder 26 is connected to the second lance body 10 outgoing drive the first lance body 10 is arranged displaceably in the second lance body 17. In the position shown in FIG. 1, the first lance body 10 is in the “lowered” position, in which the end of the first lance body 10 is aligned with the end of the second lance body 17, so that the lance mouth 27 for blowing out the Oxygen from the inner guide tube 11 or the associated Laval nozzle 12 is given. In this position, the burner nozzles 19 are completely covered by the first lance body 10, so that any material that may be sprayed on cannot reach the burner nozzles 19.
Wie aus Figur 2 zu entnehmen ist, kommen die Brennerdüsen 19 bei Anhebung des ersten Lanzenkörpers 10 in dem zweiten Lanzenkörper 17 frei, so daß sich bei weiterhin austretendem Sauerstoff eine Reaktion von Brenngas mit Sauerstoff im Bereich der Lanzenmündung 27 einstellt und so die gewünschte Brennerflamme zustande kommt. Über die Zylinder 26 kann eine stufenlose Einstellung des Abstandes der Brennerdüsen 19 zu dem Sauerstoffaustritt aus der Lanzenmündung 27 erfolgen, so daß eine optimale Führung der Verbrennungsreaktion möglich ist.As can be seen from FIG. 2, when the first lance body 10 is raised, the burner nozzles 19 are released in the second lance body 17, so that when oxygen continues to escape, a reaction of fuel gas with oxygen occurs in the area of the lance mouth 27 and the desired burner flame is thus obtained is coming. The distance between the burner nozzles 19 and the oxygen outlet from the lance mouth 27 can be continuously adjusted via the cylinders 26, so that an optimal control of the combustion reaction is possible.
Die in der vorstehenden Beschreibung, den Patentansprüchen, der Zusammenfassung und der Zeichnung offenbarten Merkmale des Gegenstandes dieser Unterlagen können einzeln als auch in beliebigen Kombinationen untereinander für die Verwirklichung der Erfindung in ihren verschiedenen Ausführungsformen wesentlich sein. The features of the subject matter of these documents disclosed in the above description, the patent claims, the abstract and the drawing can be essential individually or in any combination with one another for realizing the invention in its various embodiments.

Claims

Variabel einsetzbare KombilanzeMulti-purpose combi lance
P a t e n t a n s p r ü c h eP a t e n t a n s r u c h e
Lanze zum Behandeln von in metallurgischen Gefäßen befindlichen flüssigen Metallschmelzen, insbesondere von einem Vakuum ausgesetztem Stahl in RH-Gefäßen sowie zum Heizen der RH-Gefäße vor oder zwischen den Behandlungsphasen, die ein inneres Leitrohr zum Führen von Gasen, insbesondere Sauerstoff, mit einer kopfendigen Lanzenmündung zum Aufblasen des Gases besitzt und über ihre Gesamtlänge einen ersten Kühlmantel aufweist und fußendig an eine Gas- und Kühlmedienversorgung angeschlossen ist, wobei die Lanze zur Ausführung einer Brennerfunktion auf dem äußeren Umfang des ersten Kühlmantels angeordnete Kanäle zur Durchleitung eines Brenngases zu im Bereich der kopfendigen Lanzenmündung ausgebildeten, schräg zur Lanzenachse ausgerichteten Brennerdüsen aufweist und die Brenngaskanäle von einem zweiten äußeren Kühlmantel umschlossen sind, dadurch gekennzeichnet, daß das innere Leitrohr (11) mit erstem Kühlmantel (14) als ein - 10 -Lance for treating liquid metal melts in metallurgical vessels, in particular steel exposed to vacuum in RH vessels and for heating the RH vessels before or between the treatment phases, which have an inner guide tube for guiding gases, in particular oxygen, with a head-end lance mouth for inflating the gas and has a first cooling jacket over its entire length and is connected at the foot to a gas and cooling media supply, the lance for performing a burner function on the outer circumference of the first cooling jacket arranged channels for passing a fuel gas to in the region of the head-end lance mouth Has trained, obliquely aligned to the lance axis burner nozzles and the fuel gas channels are surrounded by a second outer cooling jacket, characterized in that the inner guide tube (11) with the first cooling jacket (14) as one - 10 -
erster Lanzenkörper (10) und die Brenngaskanäle (18) mit zweitem Kühlmantel (20) als ein zweiter Lanzenkörper (17) ausgebildet sind und der erste Lanzenkörper (10) in dem zweiten Lanzenkörper (17) zwischen einer angehobenen Brennerfunktionsstellung und einer abgesenkten Blasstellung verschiebbar angeordnet ist, in welcher die Brennerdüsen (19) durch den das Ende des zweiten Lanzenkörpers (17) nach unten überragenden ersten Lanzenkörper (10) abgedeckt sind.the first lance body (10) and the fuel gas channels (18) with a second cooling jacket (20) are designed as a second lance body (17) and the first lance body (10) is displaceably arranged in the second lance body (17) between a raised burner function position and a lowered blowing position in which the burner nozzles (19) are covered by the first lance body (10) which projects downward over the end of the second lance body (17).
2. Lanze nach Anspruch 1, dadurch gekennzeichnet, daß der zweite Lanzenkörper (17) den ersten Lanzenkörper (10) ringförmig umschließt.2. Lance according to claim 1, characterized in that the second lance body (17) surrounds the first lance body (10) in a ring.
3. Lanze nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der erste Lanzenkörper (10) in dem zweiten Lanzenkörper (17) zur Einstellung eines variablen Abstandes der Brennerdüsen (19) von der Brennermündung des zweiten Lanzenkörpers (17) stufenlos verschiebbar ist.3. Lance according to claim 1 or 2, characterized in that the first lance body (10) in the second lance body (17) for adjusting a variable distance of the burner nozzles (19) from the burner mouth of the second lance body (17) is continuously displaceable.
4. Lanze nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der erste Lanzenkörper (10) von einer an dem zweiten Lanzenkörper (17) angeschlagenen Hub orrichtung (26) bewegbar ist.4. Lance according to one of claims 1 to 3, characterized in that the first lance body (10) by a on the second lance body (17) struck lifting device (26) is movable.
5. Lanze nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der zweite Lanzenkörper (17) sich über die gesamte Länge des ersten Lanzenkörpers (10) erstreckt und getrennt angeordnete HubVorrichtungen für den ersten Lanzenkörper (10) und den zweiten Lanzenkörper (17) vorgesehen sind. 5. Lance according to one of claims 1 to 3, characterized in that the second lance body (17) extends over the entire length of the first lance body (10) and separately arranged lifting devices for the first lance body (10) and the second lance body (17 ) are provided.
EP99927699A 1998-04-20 1999-04-19 Variably insertable combined lance with displaceable burner and blower lance bodies Expired - Lifetime EP1080236B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19817590 1998-04-20
DE19817590A DE19817590C1 (en) 1998-04-20 1998-04-20 Combination lance for treatment of metallurgical melts
PCT/DE1999/001202 WO1999054511A1 (en) 1998-04-20 1999-04-19 Variably insertable combined lance with displaceable burner and blower lance bodies

Publications (2)

Publication Number Publication Date
EP1080236A1 true EP1080236A1 (en) 2001-03-07
EP1080236B1 EP1080236B1 (en) 2002-06-12

Family

ID=7865189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99927699A Expired - Lifetime EP1080236B1 (en) 1998-04-20 1999-04-19 Variably insertable combined lance with displaceable burner and blower lance bodies

Country Status (10)

Country Link
US (1) US6368550B1 (en)
EP (1) EP1080236B1 (en)
KR (1) KR20010071159A (en)
CN (1) CN1214120C (en)
AT (1) ATE219156T1 (en)
BR (1) BR9909769A (en)
DE (2) DE19817590C1 (en)
ES (1) ES2180305T3 (en)
RU (1) RU2211248C2 (en)
WO (1) WO1999054511A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10201108A1 (en) * 2002-01-15 2003-07-24 Sms Demag Ag Pyrometric metallurgy high-speed oxygen injection process for electric arc furnace involves pulse emission of oxygen-rich gas at supersonic speed
GB0209364D0 (en) * 2002-04-24 2002-06-05 Boc Group Plc Injection of particulate material into liquid
KR101010777B1 (en) * 2003-07-19 2011-01-25 주식회사 포스코 Rotary complex lance
US7297180B2 (en) * 2005-07-13 2007-11-20 Praxair Technology, Inc. Method for operating a vacuum vessel with a coherent jet
JP5800990B2 (en) * 2011-06-30 2015-10-28 オウトテック オサケイティオ ユルキネンＯｕｔｏｔｅｃ Ｏｙｊ Upper immersion lance
KR101616212B1 (en) * 2011-09-02 2016-04-27 오토텍 오와이제이 Lances for top submerged injection
ES2566954T3 (en) * 2011-10-10 2016-04-18 Primetals Technologies Germany Gmbh Blow lance with direct ignition by means of retractable ignition lance
US8992656B2 (en) * 2011-12-21 2015-03-31 Praxair Technology, Inc. Controllable solids injection
KR101408223B1 (en) * 2012-12-10 2014-06-16 주식회사 포스코 Apparatus for detecting flame and TOB burner having the same
US9068779B2 (en) * 2013-03-15 2015-06-30 L'Air Liquide SociétéAnonyme Pour L 'Étude Et L Eploitation Des Procedes Georges Claude Water-cooled burner and/or injector panel kits, water-cooled burner and/or injector panel apparatus, and methods of using the same
DE102014215794A1 (en) * 2014-08-08 2016-02-11 Primetals Technologies Austria GmbH Burner lance unit
RU2601848C1 (en) * 2015-04-21 2016-11-10 Общество с ограниченной ответственностью научно-техническое предприятие "Аконт" (ООО НТП "Аконт") Device for intensification of melting in arc steel furnace
CN105823045A (en) * 2016-05-23 2016-08-03 苏州宝联重工股份有限公司 Converter gas nozzle for RH refining furnace and RH refining furnace

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972517A (en) * 1974-08-05 1976-08-03 Fedor Vladimirovich Kraizinger Tuyere for introducing reactants into a bath of molten metal
DE2438676A1 (en) * 1974-08-12 1976-02-26 Kraisinger Tuyere for top-blown steel converters - contg. coaxial inner tube so several reactants can be fed to molten metal
DE3301466C1 (en) * 1983-01-18 1984-04-12 Korf & Fuchs Systemtechnik GmbH, 7601 Willstätt Burner or blow nozzle for use in a metallurgical furnace and arrangement in the wall of such a furnace
US4752330A (en) * 1986-11-21 1988-06-21 American Combustion, Inc. Method for melting and refining metals
FR2644558A1 (en) * 1989-03-16 1990-09-21 Air Liquide Arc furnace equipped with fuel oil/oxygen burners and fuel oil/oxygen burner
US5714113A (en) * 1994-08-29 1998-02-03 American Combustion, Inc. Apparatus for electric steelmaking
DE4442362C1 (en) * 1994-11-18 1996-04-18 Mannesmann Ag Method and appts. for performing a variety of processes on a melt using standard equipment
DE29807145U1 (en) * 1998-04-20 1998-07-02 Technometal Gesellschaft für Metalltechnologie mbH, 47051 Duisburg Multi-purpose combi lance

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9954511A1 *

Also Published As

Publication number Publication date
CN1305536A (en) 2001-07-25
BR9909769A (en) 2001-01-30
RU2211248C2 (en) 2003-08-27
WO1999054511A1 (en) 1999-10-28
KR20010071159A (en) 2001-07-28
DE19817590C1 (en) 1999-03-18
EP1080236B1 (en) 2002-06-12
CN1214120C (en) 2005-08-10
ATE219156T1 (en) 2002-06-15
ES2180305T3 (en) 2003-02-01
DE59901746D1 (en) 2002-07-18
US6368550B1 (en) 2002-04-09

Similar Documents

Publication Publication Date Title
DE60037725T2 (en) CONTINUOUS HEATING, MELTING, RAFINING AND CASTING
DE69906125T2 (en) INTEGRATED DEVICE FOR INJECTING TECHNOLOGICAL GAS AND SOLIDS, AND METHOD FOR APPLYING THIS DEVICE FOR TREATING METAL MELT
DE19817590C1 (en) Combination lance for treatment of metallurgical melts
DE69332574T2 (en) Method and device for vacuum degassing steel melts
DE3931392A1 (en) METHOD AND DEVICE FOR AT LEASTING SIMULTANEOUSLY IMPROVING A METAL MELT WITH A GAS AND FINE-GRAINED SOLIDS
EP0180741A1 (en) Process and installation for maintaining or increasing the temperature of a metal melt
DE1924812C3 (en) Burner lance for a metallurgical furnace and method for operating such a furnace with this burner lance
DE2921702A1 (en) ELECTRO-METAL MELTING STOVE
DE2726078C3 (en) Method and device for removing slag or the like. of molten metal
WO1985002203A1 (en) Ld-converter with post combustion
DE29807145U1 (en) Multi-purpose combi lance
DE3903444C1 (en) Method and apparatus for transporting liquid metal from a metallurgical furnace to a casting vessel
EP0094334B1 (en) Device for the metallurgical treatment of liquid metals
EP0355520B1 (en) Method of heat treating workpieces
EP0564432B1 (en) Process for the production of steel from scrap
WO1990006481A2 (en) Furnace for melting down scrap iron
DE1433656A1 (en) Method and device for adding substances to the bath of a Siemens-Martin furnace
DE102010007119B3 (en) Vakuumumlaufentgasungsanlage with pilot burner
DE2519622C2 (en) Device for separating mixtures of at least partially molten metals, metal compounds and / or metal-containing slags in a centrifugal drum
DE19811722C1 (en) Apparatus for vacuum refining of metal, in particular, steel melts
DE2310240A1 (en) PROCEDURE FOR MONITORING AND REGULATING THE DECARBATION DURING BIG IRON FRESHING AND DEVICE FOR CARRYING OUT THE PROCESS
DE69011436T2 (en) Device for preheating a pouring nozzle for molten metal and metal casting device equipped with this device.
EP0832301B1 (en) Process for post-combustion of reaction gases produced during the vacuum processing of steel and apparatus for carring out the process.
DE1176976B (en) Device for the production of protrusions and indentations having powder from relatively easily fusible metals
DE2438711A1 (en) CASTING DEVICE FOR MELT

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

17P Request for examination filed

Effective date: 20001012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE DE ES FR GB IT LU NL SE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 20011106

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VAI FUCHS GMBH

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE ES FR GB IT LU NL SE

REF Corresponds to:

Ref document number: 219156

Country of ref document: AT

Date of ref document: 20020615

Kind code of ref document: T

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 59901746

Country of ref document: DE

Date of ref document: 20020718

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20020916

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2180305

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

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

26N No opposition filed

Effective date: 20030313

NLT1 Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1

Owner name: SIEMENS VAI METALS TECHNOLOGIES GMBH

REG Reference to a national code

Ref country code: FR

Ref legal event code: CJ

Ref country code: FR

Ref legal event code: CD

Ref country code: FR

Ref legal event code: CA

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

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

Ref country code: LU

Payment date: 20100412

Year of fee payment: 12

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

Ref country code: NL

Payment date: 20100407

Year of fee payment: 12

Ref country code: AT

Payment date: 20100310

Year of fee payment: 12

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

Ref country code: SE

Payment date: 20100408

Year of fee payment: 12

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20111101

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 219156

Country of ref document: AT

Kind code of ref document: T

Effective date: 20110419

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

Ref country code: NL

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

Effective date: 20111101

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

Ref country code: AT

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

Effective date: 20110419

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

Ref country code: FR

Payment date: 20120507

Year of fee payment: 14

Ref country code: GB

Payment date: 20120413

Year of fee payment: 14

Ref country code: BE

Payment date: 20120510

Year of fee payment: 14

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

Ref country code: IT

Payment date: 20120426

Year of fee payment: 14

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

Ref country code: ES

Payment date: 20120524

Year of fee payment: 14

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

Ref country code: SE

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

Effective date: 20110420

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

Ref country code: LU

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

Effective date: 20110419

BERE Be: lapsed

Owner name: SIEMENS VAI METALS TECHOLOGIES G.M.B.H.

Effective date: 20130430

REG Reference to a national code

Ref country code: DE

Ref legal event code: R084

Ref document number: 59901746

Country of ref document: DE

Effective date: 20131028

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

Effective date: 20130419

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: 20130419

Ref country code: BE

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

Effective date: 20130430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20131231

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

Ref country code: IT

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

Effective date: 20130419

Ref country code: FR

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

Effective date: 20130430

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20140606

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

Ref country code: ES

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

Effective date: 20130420

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

Ref country code: DE

Payment date: 20150619

Year of fee payment: 17

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59901746

Country of ref document: DE

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

Ref country code: DE

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

Effective date: 20161101