WO2009103257A1 - Method for the oxidation of combustible constituents in the exhaust gas of an arc furnace - Google Patents

Method for the oxidation of combustible constituents in the exhaust gas of an arc furnace Download PDF

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Publication number
WO2009103257A1
WO2009103257A1 PCT/DE2009/000081 DE2009000081W WO2009103257A1 WO 2009103257 A1 WO2009103257 A1 WO 2009103257A1 DE 2009000081 W DE2009000081 W DE 2009000081W WO 2009103257 A1 WO2009103257 A1 WO 2009103257A1
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WO
WIPO (PCT)
Prior art keywords
exhaust gas
oxygen
injectors
oxidation
combustible
Prior art date
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PCT/DE2009/000081
Other languages
German (de)
French (fr)
Inventor
Norbert Uebber
Jochen SCHLÜTER
Udo Falkenreck
Original Assignee
Sms Siemag Ag
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Filing date
Publication date
Application filed by Sms Siemag Ag filed Critical Sms Siemag Ag
Publication of WO2009103257A1 publication Critical patent/WO2009103257A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/28—Arrangement of controlling, monitoring, alarm or the like devices
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
    • C21C5/5217—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace equipped with burners or devices for injecting gas, i.e. oxygen, or pulverulent materials into the furnace
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/0014—Devices for monitoring temperature
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
    • C21C2005/5223—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace with post-combustion
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C2005/5288—Measuring or sampling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
    • F27D2019/0012—Monitoring the composition of the atmosphere or of one of their components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
    • F27D2019/0012—Monitoring the composition of the atmosphere or of one of their components
    • F27D2019/0015—Monitoring the composition of the exhaust gases or of one of its components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
    • F27D2019/0018—Monitoring the temperature of the atmosphere of the kiln
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0028—Regulation
    • F27D2019/0034—Regulation through control of a heating quantity such as fuel, oxidant or intensity of current
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the invention relates to a method for the oxidation of combustible constituents in the exhaust gas of an electric arc furnace, wherein oxygen is injected into the exhaust gas through injectors mounted at several locations in the furnace chamber for the oxidation of the combustible constituents in the exhaust gas.
  • the thermal energy of the CO2 formed by the oxidation can be utilized for heating the insert in the electric arc furnace.
  • a major disadvantage of these methods is that due to heterogeneous conditions in the furnace to different CO concentrations in the furnace chamber, so that the measurement of the CO concentration is correct only in the area or for the area where the measurement is made. If now the oxygen injection of all injectors is tuned to this measured value, this leads to completely different burns or Reactions of carbon monoxide to carbon dioxide depending on the location of injection.
  • the object of the invention is to adapt the oxygen injection to the heterogeneous states within an arc furnace.
  • This object is achieved according to the invention by a method for the oxidation of combustible components in the exhaust gas of an electric arc furnace, wherein injected into the exhaust gas by injectors mounted at several points in the furnace chamber oxygen for oxidizing the combustible components in the exhaust gas, the proportion of combustible exhaust gas components in the immediate area of the individual Oxygen injectors are measured and the oxygen supply is controlled as a function of this measurement for the individual injectors temporally and / or locally differentiated.
  • the respective local CO concentration in the region of the oxygen injectors is thus detected, in order then to control the use of the oxygen injectors as a function of the data thus obtained.
  • the detection can be done by optical sensors, which are assigned to the injectors so that substantially the gas space is detected under the effective range of the respective oxygen beam optically and the local CO concentration is measured.
  • optical fibers may be arranged in the oxygen injector so that the light of the region is optically detected under the oxygen beam.
  • the radiation entering the optical fiber is directed to a receiver in which the radiation significant to the combustible components is received and evaluated.
  • the oxygen supply is then controlled for the respective injector.
  • a possible additional benefit of the invention lies in the fact that the spectroscopic information obtained in this way can also be used for further state measurements, such as, for example, local temperature measurements or obtaining information about the melting state of the insert.
  • an electric arc furnace is shown schematically and designated 1.
  • 2 indicates the electrodes and 3 the exhaust manifold.
  • oxygen or Nachverbrennungsinjektoren 4 protrude into the furnace interior, on the one hand allow the supply of oxygen into the furnace vessel and on the other hand contain the sensors 5, with which the exhaust gas analysis, ie the determination of the CO content can take place.
  • the drawn bubbles around the outlet of the injectors are intended to indicate that the detection of the CO content, located in the furnace interior exhaust gas, takes place substantially directly in the vicinity of the injectors. This results in different values or CO contents based on the heterogeneous composition of the exhaust gas relative to the entire furnace interior.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

The invention relates to a method for the oxidation of combustible constituents in the exhaust gas of an arc furnace, wherein oxygen for the oxidation of the combustible constituents in the exhaust gas is injected into the exhaust gas through injectors provided at several points in the space inside the furnace.  For this purpose, it is provided that the proportion of combustible constituents in the exhaust gas is measured in the direct vicinity of the individual oxygen injectors and, on the basis of this measurement, the supply of oxygen for the individual injectors is controlled in a temporally and/or locationally differentiated manner.

Description

Verfahren zur Oxidation brennbarer Bestandteile im Abgas eines Lichtbogenofens Process for the oxidation of combustible components in the exhaust gas of an electric arc furnace
Die Erfindung betrifft ein Verfahren zur Oxidation brennbarer Bestandteile im Abgas eines Lichtbogenofens, wobei in das Abgas durch an mehreren Stellen im Ofenraum angebrachte Injektoren Sauerstoff zur Oxidation der brennbarer Bestandteile im Abgas injiziert wird.The invention relates to a method for the oxidation of combustible constituents in the exhaust gas of an electric arc furnace, wherein oxygen is injected into the exhaust gas through injectors mounted at several locations in the furnace chamber for the oxidation of the combustible constituents in the exhaust gas.
Es ist bekannt, dass im Abgas von Lichtbogenöfen brennbare Bestandteile, vor allem Kohlenstoffmonoxid (CO), enthalten sind. Um einerseits den Anteil von toxischem CO im Abgas zu reduzierten und um andererseits eine Energieeinsparung zu erreichen, ist es bekannt, den CO-Anteil nachträglich zu oxidieren und die dabei freigesetzte thermische Energie zur Aufheizung des Schmelzgutes zu nutzen.It is known that flammable components, especially carbon monoxide (CO), are contained in the exhaust gas of electric arc furnaces. On the one hand to reduce the proportion of toxic CO in the exhaust gas and on the other hand to achieve energy savings, it is known to subsequently oxidize the CO content and to use the thermal energy released to heat the melt.
Aus der DE 102 17 090 A1 ist ein Elektrolichtbogenofen mit einer Vorrichtung zur Nachverbrennung von Kohlenmonoxid im Abgas bekannt.From DE 102 17 090 A1 an electric arc furnace with a device for the afterburning of carbon monoxide in the exhaust gas is known.
Hierbei wird in das dem Abgaskrümmer aus dem Ofenraum zuströmende Abgas, das das Kohlenmonoxid enthält, Sauerstoff aus einem im Abgaskrümmer angeordneten Injektor zugeführt, so dass das Kohlenmonoxid zumindest teilweise zu Kohlendioxid oxidiert wird.In this case, in the exhaust gas flowing from the furnace chamber exhaust gas containing the carbon monoxide, supplied oxygen from a arranged in the exhaust manifold injector, so that the carbon monoxide is at least partially oxidized to carbon dioxide.
Aus der WO 97/17475 ist es weiterhin bekannt, dass Abgas zu analysieren und den Sauerstoff dann durch über den Ofenraum verteilt angeordnete Injektoren zu injizieren, so dass auf diese Weise das Kohlenmonoxid zu CO2 oxidiert wird.From WO 97/17475 it is also known to analyze the exhaust gas and then inject the oxygen distributed through the furnace chamber arranged injectors, so that in this way the carbon monoxide is oxidized to CO 2 .
Bei dieser Ausgestaltung kann die thermische Energie des durch die Oxidation gebildeten CO2 zur Aufheizung des Einsatzes im Lichtbogenofen ausgenutzt werden.In this embodiment, the thermal energy of the CO2 formed by the oxidation can be utilized for heating the insert in the electric arc furnace.
Ein wesentlicher Nachteil dieser Methoden besteht darin, dass es aufgrund heterogener Zustände im Ofen zu unterschiedlichen CO-Konzentrationen im Ofenraum kommt, so dass die Messung der CO-Konzentration nur in dem Bereich oder für den Bereich richtig ist, an dem die Messung erfolgt. Wird nun die Sauerstoffinjektion aller Injektoren auf diesen gemessenen Wert abgestimmt, so führt dies zu völlig unterschiedlichen Verbrennungen oder Umsetzungen von Kohlenmonoxid zu Kohlendioxid je nach dem Ort der Injizierung.A major disadvantage of these methods is that due to heterogeneous conditions in the furnace to different CO concentrations in the furnace chamber, so that the measurement of the CO concentration is correct only in the area or for the area where the measurement is made. If now the oxygen injection of all injectors is tuned to this measured value, this leads to completely different burns or Reactions of carbon monoxide to carbon dioxide depending on the location of injection.
Der Erfindung liegt die Aufgabe zugrunde die Sauerstoff-Injektion an die heterogenen Zustände innerhalb eines Lichtbogenofens anzupassen.The object of the invention is to adapt the oxygen injection to the heterogeneous states within an arc furnace.
Gelöst wird diese Aufgabe erfindungsgemäß durch ein Verfahren zur Oxidation brennbarer Bestandteile im Abgas eines Lichtbogenofens, wobei in das Abgas durch an mehreren Stellen im Ofenraum angebrachte Injektoren Sauerstoff zur Oxidation der brennbarer Bestandteile im Abgas injiziert wird, wobei der Anteil brennbarer Abgasbestandteile im unmittelbaren Bereich der einzelnen Sauerstoff-Injektoren gemessen und die Sauerstoffzufuhr in Abhängigkeit von dieser Messung für die einzelnen Injektoren zeitlich und/oder örtlich differenziert gesteuert wird.This object is achieved according to the invention by a method for the oxidation of combustible components in the exhaust gas of an electric arc furnace, wherein injected into the exhaust gas by injectors mounted at several points in the furnace chamber oxygen for oxidizing the combustible components in the exhaust gas, the proportion of combustible exhaust gas components in the immediate area of the individual Oxygen injectors are measured and the oxygen supply is controlled as a function of this measurement for the individual injectors temporally and / or locally differentiated.
Erfindungsgemäß wird also die jeweils lokale CO-Konzentration im Bereich der Sauerstoff- Injektoren erfasst wird, um dann in Abhängigkeit von den so erhobenen Daten den Einsatz der Sauerstoff-Injektoren zu steuern. Das Erfassen kann durch optische Sensoren geschehen, die den Injektoren so zugeordnet sind, dass im Wesentlichen der Gasraum unter dem Wirkungsbereich des jeweiligen Sauerstoffstrahls optisch erfasst und die lokale CO- Konzentration gemessen wird. Hierzu können Lichtleiter in dem Sauerstoffinjektor so angeordnet sein, dass das Licht des Bereiches unter dem Sauerstoffstrahl optisch erfasst wird. Die in den Lichtleiter eintretende Strahlung wird zu einem Empfänger geleitet, in dem die für die brennbaren Bestandteile signifikante Strahlung empfangen und ausgewertet wird. Abhängig davon wird die Sauerstoffzufuhr dann für den jeweiligen Injektor gesteuert. Die Erfindung ermöglicht also eine effiziente, differenzierte und damit zweckgerichtete Steuerung der Nachverbrennung im Lichtbogenofen.According to the invention, the respective local CO concentration in the region of the oxygen injectors is thus detected, in order then to control the use of the oxygen injectors as a function of the data thus obtained. The detection can be done by optical sensors, which are assigned to the injectors so that substantially the gas space is detected under the effective range of the respective oxygen beam optically and the local CO concentration is measured. For this purpose, optical fibers may be arranged in the oxygen injector so that the light of the region is optically detected under the oxygen beam. The radiation entering the optical fiber is directed to a receiver in which the radiation significant to the combustible components is received and evaluated. Depending on this, the oxygen supply is then controlled for the respective injector. Thus, the invention enables an efficient, differentiated and thus purposeful control of the afterburning in the electric arc furnace.
Ein möglicher Zusatznutzen der Erfindung liegt darin, dass die so gewonnenen spektroskopischen Informationen auch für weitere Zustandserfassungen genutzt werden können, wie beispielsweise lokale Temperaturmessungen oder die Gewinnung von Hinweisen über den Einschmelzzustand des Einsatzes.A possible additional benefit of the invention lies in the fact that the spectroscopic information obtained in this way can also be used for further state measurements, such as, for example, local temperature measurements or obtaining information about the melting state of the insert.
Die Erfindung soll nachfolgend unter Bezug auf die Zeichnung erläutert werden.The invention will be explained below with reference to the drawing.
Hierin ist schematisch ein Lichtbogenofen dargestellt und mit 1 bezeichnet. Mit 2 sind die Elektroden angedeutet und mit 3 der Abgaskrümmer. Örtlich über das Ofengefäß verteilt, ragen Sauerstoff- oder Nachverbrennungsinjektoren 4 in den Ofeninnenraum, die einerseits das Zuführen von Sauerstoff in das Ofengefäß ermöglichen und andererseits die Sensoren 5 enthalten, mit denen die Abgasanalyse, also die Bestimmung des CO-Anteiles erfolgen kann.Here, an electric arc furnace is shown schematically and designated 1. 2 indicates the electrodes and 3 the exhaust manifold. Locally distributed over the furnace vessel, oxygen or Nachverbrennungsinjektoren 4 protrude into the furnace interior, on the one hand allow the supply of oxygen into the furnace vessel and on the other hand contain the sensors 5, with which the exhaust gas analysis, ie the determination of the CO content can take place.
Die eingezeichneten Blasen um den Austritt der Injektoren herum sollen andeuten, dass die Erfassung des CO-Anteiles, des im Ofeninneren befindlichen Abgases, im Wesentlichen direkten im Umfeld der Injektoren erfolgt. Damit ergeben sich aufgrund der heterogen Zusammensetzung des Abgases bezogen auf den gesamten Ofeninnenraum unterschiedliche Werte oder CO-Anteile.The drawn bubbles around the outlet of the injectors are intended to indicate that the detection of the CO content, located in the furnace interior exhaust gas, takes place substantially directly in the vicinity of the injectors. This results in different values or CO contents based on the heterogeneous composition of the exhaust gas relative to the entire furnace interior.
Da die einzelnen Injektoren nun aber individuell gesteuert werden können, lassen sich Verbrennungen örtlich an diese Unterschiede einwandfrei anpassen, so dass eine wesentlich verbesserte Nachverbrennung der toxischen Anteile erreichbar ist. However, since the individual injectors can now be individually controlled, burns can be perfectly adapted locally to these differences, so that a significantly improved post-combustion of the toxic components can be achieved.

Claims

Patentansprüche claims
1. Verfahren zur Oxidation brennbarer Bestandteile im Abgas eines Lichtbogenofens, wobei in das Abgas durch an mehreren Stellen im Ofenraum angebrachte Injektoren Sauerstoff zur Oxidation der brennbarer Bestandteile im Abgas injiziert wird, dadurch gekennzeichnet, dass der Anteil brennbarer Abgasbestandteile im unmittelbaren Bereich der einzelnen Sauerstoff-Injektoren gemessen und die Sauerstoffzufuhr in Abhängigkeit von dieser Messung für die einzelnen Injektoren zeitlich und/oder örtlich differenziert gesteuert wird.1. A method for the oxidation of combustible constituents in the exhaust gas of an electric arc furnace, wherein oxygen is injected into the exhaust gas at several points in the furnace chamber injectors oxygen for the oxidation of the combustible constituents in the exhaust gas, characterized in that the proportion of combustible exhaust gas constituents in the immediate region of the individual oxygen Injectors are measured and the oxygen supply is controlled as a function of this measurement for the individual injectors temporally and / or locally differentiated.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Messung des Anteils brennbarer Abgasbestandteile durch spektroskopische Sensoren erfolgt, die den einzelnen Sauerstoff-Injektoren lokal zugeordnet sind.2. The method according to claim 1, characterized in that the measurement of the proportion of combustible exhaust gas components is carried out by spectroscopic sensors, which are assigned to the individual oxygen injectors locally.
3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Strahlung unterhalb des durch die Injektoren eintretenden Sauerstoff-Strahls durch Lichtleiter in den Sauerstoff-Injektoren erfasst und einer Auswerteeinheit zugeleitet wird, in der die relevanten Strahlungsanteile gemessen und aus den Messergebnissen der CO- Gehalt im Bereich jedes Injektors ermittelt wird.3. The method according to claim 1, characterized in that the radiation is detected below the entering through the injectors oxygen beam through optical fibers in the oxygen injectors and fed to an evaluation in which the relevant radiation components measured and from the measurement results of CO content in the area of each injector is determined.
4. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die durch die Strahlungsmessung erhaltenen spektroskopischen Informationen zusätzlich auch für andere Zustandserfassungen genutzt werden wie lokale Temperaturmessungen und Gewinnung von Hinweisen über den Einschmelzzustand des im Lichtbogenofen befindlichen Einsatzes. 4. The method according to any one of the preceding claims, characterized in that the spectroscopic information obtained by the radiation measurement are also used for other state detections such as local temperature measurements and obtaining clues about the smelting of the insert located in the arc furnace.
PCT/DE2009/000081 2008-02-18 2009-01-21 Method for the oxidation of combustible constituents in the exhaust gas of an arc furnace WO2009103257A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008009923.6 2008-02-18
DE102008009923.6A DE102008009923B4 (en) 2008-02-18 2008-02-18 Process for the oxidation of combustible components in the exhaust gas of an electric arc furnace

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DE102021004593A1 (en) 2021-09-10 2023-03-16 Promecon Process Measurement Control Gmbh Metallurgical melting furnace and method for determining the amount of heteromolecular gas

Citations (2)

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Publication number Priority date Publication date Assignee Title
EP0671595A1 (en) * 1993-09-30 1995-09-13 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Electric arc fusion furnace
US6038245A (en) * 1995-06-19 2000-03-14 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for melting a charge in an electrical arc furnace

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Publication number Priority date Publication date Assignee Title
DE1936649A1 (en) * 1968-08-22 1970-02-26 Krupp Gmbh Optimizing the oxygen feed in electro arc furnaces
WO1997017475A1 (en) 1995-11-09 1997-05-15 Air Liquide America Corporation Process for melting and refining ferrous scrap through use of oxygen injection
DE10217090A1 (en) 2002-04-17 2003-10-30 Linde Ag Electric arc furnace used in metallurgy comprises a device for the post combustion of carbon monoxide, and a burner arranged in the waste gas elbow of the furnace

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0671595A1 (en) * 1993-09-30 1995-09-13 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Electric arc fusion furnace
US6038245A (en) * 1995-06-19 2000-03-14 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process for melting a charge in an electrical arc furnace

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