EP2423336B1 - Procédé de contrôle de température du bain de métal lors du processus de soufflage dans un convertisseur - Google Patents

Procédé de contrôle de température du bain de métal lors du processus de soufflage dans un convertisseur Download PDF

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Publication number
EP2423336B1
EP2423336B1 EP11166662.4A EP11166662A EP2423336B1 EP 2423336 B1 EP2423336 B1 EP 2423336B1 EP 11166662 A EP11166662 A EP 11166662A EP 2423336 B1 EP2423336 B1 EP 2423336B1
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Prior art keywords
temperature
inb
metal bath
measured
blowing
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German (de)
English (en)
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EP2423336A1 (fr
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Johann Reichel
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SMS Group GmbH
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SMS Group GmbH
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    • 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
    • C21C5/30—Regulating or controlling the blowing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4673—Measuring and sampling devices
    • 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
    • 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
    • F27D2019/0021—Monitoring the temperature of the exhaust gases

Definitions

  • the invention relates to a method for controlling the blowing process in a converter, wherein the time course of the blowing process is controlled by determining the temperature and the carbon content of the metal bath and by exhaust gas analyzes.
  • the measurement and control of the metal bath temperature is an essential target variable at the end of the converter process.
  • a non-contact measurement of the metal bath temperature with, for example, a radiation meter separates, because on the molten metal floats a thick layer of slag whose temperature is indefinitely lower and in addition dust and hot exhaust gases make the measurement difficult. It is therefore customary to interrupt the converter process for manual temperature measurement in order, for example, to introduce measuring lances with end-mounted thermocouples into the molten metal. The time required for this complicates the process control and the process flow. As a result, were continuous In situ temperature measurements of the metal bath temperature during the converter process were proposed, which led to a significant increase in efficiency.
  • WO 2007/079894 A1 describes a converter with a measuring device for the optical temperature determination of the molten metal, wherein the electromagnetic radiation emitted by the metal is passed through an optical waveguide for determining the temperature of the metal to an optical detector.
  • the object is achieved with the characterizing features of claim 1, characterized in that for temperature control and estimation of the temperature of the metal bath measured by a T-Sub model continuously exhaust gas dedusting T w (t) with the acyclically determined actual metal bath temperature T M (t inb ) are combined to form a calculated metal bath temperature T M (t) and the resulting temperature values are linked to the control signals calculated in a converter model for blowing.
  • the T-Sub model is independent of the converter model and has a superordinate function.
  • the converter model calculates the O 2 quantities and supplies the control signal for blowing, while the T-Sub model determines the steel temperature in the converter followed only on the basis of the exhaust gas temperature.
  • the exhaust gas temperature with the difference of the instantaneous metal bath and exhaust gas temperature becomes a calculated temperature T M (t) of the metal bath combined.
  • FIG. 1 is shown in the form of a graph, the time course of the blowing process with the measured exhaust gas temperatures Tw (t) during blowing and the setpoint end temperature T A (t f ) of the metal bath. To complete the information on the chemical constituents of the exhaust gas are listed, but will not be discussed in detail.
  • FIG. 1 is shown as a dashed curve.
  • FIG. 2 is a possible linkage of the T-Sub model 1 drawn with a converter model 2, wherein this linkage is brought about by corresponding branches and merging of the predetermined setpoint signals 3, the measured input signals 4 and the calculated output signals 5.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Claims (1)

  1. Procédé pour la commande du processus de soufflage dans un convertisseur, dans lequel sur base d'une détermination de la température et de la teneur du bain métallique en carbone et sur base d'analyses des gaz d'échappement, on règle l'allure temporelle du processus de soufflage, le contrôle de la température du bain métallique étant réalisé en continu à partir d'un sous-modèle T (1) en combinant les températures des gaz d'échappement (Tw(t)) mesurées avant le dépoussiérage des gaz d'échappement et la température du bain métallique mesurée en réalité (TM(tInb)) pour obtenir une température calculée du bain métallique (TM(t)) et en comparant les valeurs de températures ainsi obtenues à la température finale de consigne (TA(tr)) du bain métallique et en les reliant aux signaux de commande pour le soufflage, calculés dans un modèle de convertisseur (2), dans lequel, pour le calcul des températures du bain métallique (TM(t)), la température du bain métallique (TM(tInb)) réelle déterminée à un moment (tInb) de manière acyclique manuellement ou avec une sublance et la température des gaz d'échappement mesurée à ce moment (TW(tInb)), ainsi que les températures des gaz d'échappement mesurées en continu (Tw(t)) sont reliées les unes aux autres via le mode de calcul indiqué ci-après :
    a) le calcul de la différence de température constante (ΔT) entre la température réelle mesurée (TM(tInb)) du bain métallique au moment indiqué (tInb) et la température des gaz d'échappement (TW(tInb)) mesurée au même moment via l'équation ΔT = T M t inb − T W t inb
    Figure imgb0010
    b) le calcul de la température du bain métallique (TM(t)) en prenant en compte la température mesurée des gaz d'échappement et du métal (TW(tInb), TM(tInb)) et les températures des gaz d'échappement (Tw(t)) mesurées en continu via le sous-modèle T (1) via l'équation T M t = T W t + ΔT
    Figure imgb0011
    c) la formation de différence à partir de la température calculée du bain métallique (TM(t)) et de la température finale de consigne (TA(tr)) ABS T A t r − T M t ≤ paramètre ΔT
    Figure imgb0012
     pour la détermination de la fin du soufflage qui est atteinte lorsque la différence atteint un paramètre ΔT prédéfini, par exemple ± 10 K et lorsque la teneur recherchée en carbone (Caim) du bain métallique est également atteinte ;
    procédé dans lequel
    jusqu'à ce que l'on atteigne la température prévue (TA(tr)) en fonction de la teneur du bain métallique en carbone mesuré au moment indiqué, étant entendu que l'on recherche en l'occurrence la valeur de consigne (Caim), on mettra en oeuvre les mesures indiquées ci-après :
    - Caim est atteint et TA(tr) n'est pas atteint : poursuite du soufflage ;
    - Caim n'est pas atteint et TA(tr) n'est pas atteint : poursuite du soufflage ;
    - Caim n'est pas atteint et TA(tr) est atteint : poursuite du soufflage (avec refroidissement correspondant) ;
    - Caim est atteint et TA(tr) est atteint : fin du soufflage.
EP11166662.4A 2010-08-25 2011-05-19 Procédé de contrôle de température du bain de métal lors du processus de soufflage dans un convertisseur Active EP2423336B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201010035411 DE102010035411A1 (de) 2010-08-25 2010-08-25 Verfahren zur Temperaturkontrolle des Metallbades während des Blasprozesses in einem Konverter

Publications (2)

Publication Number Publication Date
EP2423336A1 EP2423336A1 (fr) 2012-02-29
EP2423336B1 true EP2423336B1 (fr) 2016-09-28

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Application Number Title Priority Date Filing Date
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EP (1) EP2423336B1 (fr)
DE (1) DE102010035411A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115058555B (zh) * 2022-07-19 2023-06-30 北京博谦工程技术有限公司 一种转炉终点碳含量测量的智能软测量方法及系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3566671A (en) * 1967-06-02 1971-03-02 Leeds & Northrup Co Process measurements in oxygen blown steel refining furnaces during the finish blow phase
US3561743A (en) * 1967-10-17 1971-02-09 Gen Electric Use of stack gas as oxygen potential measurements to control the bof process
US4150973A (en) * 1976-02-24 1979-04-24 Nippon Steel Corporation Method of controlling molten steel temperature and carbon content in oxygen converter
US4416691A (en) * 1980-07-03 1983-11-22 Kobe Steel, Ltd. Method for converter blow control
DE3521190A1 (de) 1985-06-13 1986-12-18 Hoesch Stahl AG, 4600 Dortmund Vorrichtung zur temperaturmessung an einem konverter
DE19540490C1 (de) * 1995-10-23 1997-04-10 Mannesmann Ag Verfahren zum Entkohlen einer Stahlschmelze
AT411068B (de) * 2001-11-13 2003-09-25 Voest Alpine Ind Anlagen Verfahren zur herstellung einer metallschmelze in einer hüttentechnischen anlage
DE102005061675B3 (de) 2005-12-21 2007-07-26 Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH Konverter mit einem Behälter zur Aufnahme geschmolzenen Metalls und einer Messvorrichtung zur optischen Temperaturbestimmung des geschmolzenen Metalls

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