EP3687666B1 - Verfahren und vorrichtung zur steuerung des betriebs und der position einer lanzen- und düsenanordnung in einem metallschmelzbad in einem gefäss - Google Patents

Verfahren und vorrichtung zur steuerung des betriebs und der position einer lanzen- und düsenanordnung in einem metallschmelzbad in einem gefäss Download PDF

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Publication number
EP3687666B1
EP3687666B1 EP19849785.1A EP19849785A EP3687666B1 EP 3687666 B1 EP3687666 B1 EP 3687666B1 EP 19849785 A EP19849785 A EP 19849785A EP 3687666 B1 EP3687666 B1 EP 3687666B1
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EP
European Patent Office
Prior art keywords
lance
temperature
nozzle assembly
data
tip
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Active
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EP19849785.1A
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English (en)
French (fr)
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EP3687666A4 (de
EP3687666A1 (de
Inventor
Edward J. Green
Derek S. Dengel
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Berry Metal Co
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Berry Metal Co
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Publication of EP3687666A4 publication Critical patent/EP3687666A4/de
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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
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • C21C5/462—Means for handling, e.g. adjusting, changing, coupling
    • 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
    • C21C5/32—Blowing from above
    • 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
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • 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
    • 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
    • C21C2300/00—Process aspects
    • C21C2300/06—Modeling of the process, e.g. for control purposes; CII
    • 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 present invention generally relates to vessels for melting metal. More specifically, it relates to systems and methods for controlling the operation and/or positioning of a lance and nozzle assembly relative to a molten metal bath in such a vessel.
  • the Basic Oxygen Furnace (BOF) is the primary steelmaking vessel in a steel mill.
  • a general goal in the industry is to improve quality control while also reducing production time and cost.
  • a common impedance to being able to achieve that goal is the inability to determine, in real time, the temperature of the molten steel bath inside a BOF.
  • accurate temperature data, target temperatures and chemistries are often missed.
  • Failure to achieve the target temperatures and chemistries during the metal melting process can result in inefficiencies and may even result in having to reinitiate the heating process, resulting in significant economic impact.
  • This lack of ability to determine temperature in real time results in a lack of efficiency that not only applies to BOF's in the steel industry, but also to electric arc furnaces (EAF's) as well as induction furnaces.
  • EAF's electric arc furnaces
  • a BOF operates at very high temperatures. As a result, using temperature sensors inside the BOF to take temperature readings is not typically feasible. Furthermore, to the extent that using temperature sensors inside the BOF has been attempted, the high temperatures at which the BOF operates tend to substantially impact the life of the sensors.
  • thermocouple i.e., temperature sensor
  • a spring loaded thermocouple disposed in the tip of a lance
  • an infrared camera to sense the temperature of the tip of a lance or the bath itself
  • thermocouple installed in a tuyere i.e., an air nozzle which is used to blow air into the molten bath in the BOF.
  • each steel mill develops their own BOF process control strategies in an attempt to improve quality control while concurrently reducing production time and cost.
  • static models are used to determine the amount of oxygen to be blown into the bath in the vessel and the charge to be applied to the furnace, based on initial and final heat information. While these models have improved the operators' chances of achieving the desired endpoint, they do not provide real time process information and therefore target temperatures and chemistries can still be missed. Failure to achieve the desired endpoint condition can be attributed to errors in model input conditions (e.g. the unknown composition of the scrap, uncertainties in hot metal temperature and chemistry, etc.) as well as the inability of the model itself to accurately represent the physics of the conversion process.
  • One of the primary objectives for requiring a temperature measurement is to rapidly and accurately measure the end-point melt temperature for quick tap operations. Gaining access to the melt surface through the slag layer represents the primary challenge associated with accurate endpoint temperature measurement.
  • One method is to install a temperature sensing device through a tuyere. This type of sensing device is adequate at the beginning of the life of the sensor, but quickly begins to deteriorate.
  • a second type of temperature sensing device is an infrared camera located in the roof, sidewall or lance tip. The slag layer on top of the steel requires a high pressure gas to part it, and the resulting splashing of the slag creates difficulty in obtaining an accurate measurement.
  • some molten metal is always left in the bottom of the BOF, between heats, to improve melting efficiency. After every heat, some of this metal and slag freezes, building a thickness on the bottom of the furnace. After a number of heats, this thickness builds substantially enough to warrant adjusting the height of the lance relative to the bath. If the lance is too low or too close to the bath, the tip can overheat or the lance can ingest slag that can plug the orifices. On the other hand, if the lance is too high, the oxygen will not penetrate the slag. To determine the height of the lance above a bath, some furnace operators measure the buildup using a system that uses lasers to calculate the available volume of vessel.
  • Document WO2015046027 discloses the control of a metallurgical lance elevation based on a bath temperature measurement only.
  • Document WO2016103196 discloses the control of a submerged lance elevation based on two different sensor measurements, but do not disclose the use of a lance tip temperature measurement, nor the combination of lance tip temperature and bath metal temperature to control lance elevation.
  • Document CA2388397 discloses a lance having a temperature sensor for measuring the lance tip temperature, and that such measurement can be used to control the distance of the lance to the surface of the molten metal bath.
  • An objective of an embodiment of the present invention is to provide an improved system and method for controlling the operation and/or positioning of a lance and nozzle assembly with regard to a molten metal bath in a vessel.
  • Another objective of an embodiment of the present invention is to provide a system and method for continuously detecting and monitoring the temperature of a molten metal bath in a vessel.
  • the present invention provides a system and method for measuring and monitoring the temperature of a molten metal bath in a vessel, such as a BOF, and based on those temperatures, amend the position of a lance and nozzle assembly relative to the height of the molten metal bath.
  • a vessel such as a BOF
  • at least one temperature sensor is disposed proximate the tip of a lance and nozzle assembly in order to continuously measure and monitor the temperature at the tip of the lance.
  • Another temperature sensor is placed in a position to measure the temperature of molten metal bath.
  • the at least one temperature sensor is configured to provide at least one signal to a processing unit (such as a control center), and the processing unit is configured to process the at least one signal and determine the temperature of the molten metal bath.
  • the at least one temperature sensor can be either hard wired to the processing unit, or the at least one temperature sensor can be configured to wirelessly transmit the signals to the processing unit. Regardless, the system can be used to continuously monitor the temperature of the lance tip and molten metal bath over time. Moreover, the control center is configured to operate and/or position the lance and nozzle assembly relative to the molten metal bath, based on signals received and processed by the control center via the at least one temperature sensor. It is contemplated that a single sensor, such as an infrared sensor, may measure the temperature of both the lance tip and the molten metal bath in order to carry out the systems and methods of this invention.
  • the present invention comprises: a method for operating and/or positioning a lance and nozzle assembly relative to a molten metal bath in a vessel, the method comprising:
  • FIG. 1 is a block diagram of a system 10 provided in accordance with a first embodiment of the present invention.
  • the system 10 comprises a vessel 12, such as a BOF, for use in a metal making process.
  • the vessel 12 may comprise multiple layers of refractory material, such as fire brick, alumina, silica, etc., as well as one or more internal insulating layers, such as gunite or other shotcrete material. Regardless of the exact structure of the vessel 12, during the metal making process, the vessel 12 contains a molten metal bath 22 that is thermally processed as is customary in the industry.
  • the system 10 provides that a lance and nozzle assembly 14 comprising at least one temperature sensor 16 is disposed about the vessel 12.
  • the at least one temperature sensor 16 is configured to provide at least one signal to a PLC or processing unit (such as a control center) 18, and the processing unit 18 is configured to process that at least one signal received from the at least one temperature sensor 16 and determine the temperature of the molten metal bath 22 inside the vessel 12.
  • the at least one temperature sensor 16 can be either hard wired to the processing unit 18 (such as via hardwire, a fiber optic conductor, etc.), or the at least one temperature sensor 16 can be configured to wirelessly transmit the at least one signal to the processing unit 18 (such as via laser signals, a radio signal, etc.).
  • the system 10 can be used to continuously monitor the temperature of the molten metal bath 22 in the vessel 12 over time, and based on the temperature that has been detected, the processing unit 18 can change one or more operating conditions, during production, to arrive at the desired endpoint.
  • the same temperature sensor 16 may also be effectively used, by the processing unit 18, to confirm that the conversion process has reached the desired endpoint condition.
  • a sensor 16 is located at the tip of the lance and nozzle assembly 14 for detecting a temperature of the lance 14 tip and another sensor 16 is positioned near the molten metal bath 22 for detection of a temperature thereof.
  • the utility of the real-time sensor i.e., the at least one temperature sensor 16 and processing unit 18 is its ability to minimize the time and cost required to produce steel.
  • the temperature of the slag itself can be measured with the at least one temperature sensor 16 located in the lance and nozzle assembly 14 and the melt temperature inferred from this measurement.
  • This temperature probe reading the inside of the copper tip can be a spring loaded thermocouple, or an IR camera.
  • the time-resolved radiance from the slag and combustion of gases can be correlated to the temperature of the bath.
  • the operating temperature profile exhibits a peak near the start of the heat and falls rapidly to a minimum approximately 250 seconds into the heat. From that point, the radiance gradually rises, while concurrently exhibiting local minima and maxima associated with: 1) variations in combustion activity below the lance; 2) addition of ore, lime, and stone throughout the heat; and 3) changes in lance height.
  • the data effectively received (by the processing unit 18 via the at least temperature sensor 16) provides feedback information for modified lance practice and/or the time and rates of flux addition to arrive at a more uniform radiance level and greater integrated heat release rates at early times in the conversion process.
  • Tip sensor measurements may also provide an indicator of end point bath carbon content. Based on empirical evaluation of data, it has been determined that measurements pertinent to bath carbon content are consequential only after the heat has progressed for approximately 1000 seconds or more. From this time forward, the radiance exhibits an initial maximum, followed by a decrease to a local minimum, rising again to a local maximum. For many heats, within 50 seconds after the second local maximum or 100 seconds of the local minimum, the carbon endpoint is reached. From a process control perspective, it is preferable to obtain bath carbon content information as soon as feasible before reaching the endpoint to allow time for process correction, if necessary. However, failing this approach, a thermally measured endpoint carbon measurement would also be useful.
  • the processing unit 18 is configured to effectively use the at least one temperature sensor 16 in the lance and nozzle assembly 14 to calibrate the temperature of the lance while the lance is in a known position relative to the bath.
  • the processing unit 18 uses the at least one temperature sensor 16, the relative position of the lance and nozzle assembly 12 relative to the bath can be determined by the processing unit 18, indirectly without having to take further measurements, make additional calculations, or exposing anyone to a risk in safety.
  • the purpose of the present invention is to automate the real time data being collected with automated control of the lancing operations. This is done by sending data signals from the at least one temperature sensor 16 to the processing unit 18 via hardwire, fiber optic conductor, laser signals, radio signal, etc.
  • the at least one temperature sensor 16 and the processing unit 18 collectively function to permit analysis of certain bath conditions which might be metallurgical, relate to sound and light, or be pyrometric, etc. This data is received and analyzed by the processing unit 18, and the resulting analysis causes commands to be sent to the lance carriage controls and oxygen valve stand for the beneficiation of the process.
  • the arrangement may be utilized with any gas lance or oxygen-oil or oxygen fuel burner lance where some form of sensor or information gathering means is to be incorporated.
  • a central tube of the lance and nozzle assembly provides a safe and yet effective construction and shielding means for the cable conductor.
  • the arrangement may also be utilized with any signal or information transmittal method, such as but not limited to light usage or fiber optic transfer medium as well as the transmittal of an electrical signal by cable.
  • the ability to measure the bath temperature in real-time allows the operator to see what the bath is doing over time, instead of relying upon single-point measurements taken, for example, with a thermocouple. This capability can be used to prevent overshoots, reduce processing time and optimize energy usage.
  • Real-time temperature monitoring gives valuable insight into the transient behavior of the bath, thereby ensuring the ability of the measurement to accurately represent the bath as a whole. It provides a safe and economic manner in which the desired result may be achieved. It further automates the control of the oxygen blow and lance position ensuring consistency in operation between operators.
  • the present invention is directed to a combination of a lance and nozzle assembly for supplying gas to a basic oxygen furnace.
  • the lance and nozzle include an arrangement to accommodate a temperature sensing device or unit which is adapted to transmit signals providing information in connection with the refractory or contents of the bath contained within the vessel.
  • the arrangement includes a signal transmission by, for example, hard wire or radio transmission to a processing 18, such as a PLC, located in a control center. This PLC interprets the data to provide automatic control for operating or positioning the lance and nozzle assembly.
  • Figure 2 is block diagram of a method using the system shown in Figure 1 , in accordance with an embodiment of the present invention, and is self-explanatory given the description hereinabove.
  • FIG. 3 is a diagram of a preferred embodiment of the present invention.
  • System 10 preferably comprises vessel 12, lance and nozzle assembly 14, at least one temperature sensor 16, control suite 17, processing unit 18, elevation 20, molten metal bath 22, lance elevation control 24, and process operations data module 26.
  • the one or more temperatures sensors 16 may be located in various positions about the system 10, including at the tip of the lance and nozzle assembly 14, a probing mechanism within the vessel 12, or outside the vessel 12 such as in sensor systems comprising ultrasonic transceivers.
  • the system 10 comprises a sensor 16 at the tip of the lance and nozzle assembly 14, and a second sensor 16, preferably in a different location such as in the vessel 12 or outside the vessel 12, configured to measure the temperature of the molten metal bath 22.
  • Figure 4 is a flow diagram of a preferred embodiment of the present invention.
  • the flow diagram is designated with boxed reference letters that are also provided in Figure 3 to help explain where those steps in Figure 4 will typically occur in system 10.
  • the locations of these designations in Figure 3 are exemplary and non-limiting.
  • the present invention comprises a method for operating and/or positioning lance and nozzle assembly 14 relative to the molten metal bath 22 in vessel 12, the method comprising the steps of:
  • Mechanisms for obtaining tip temperature data from the tip of lance and nozzle assembly 14 include various means and methods, such as Op-T Temp, pyrometer, thermocouple, infrared temperature sensors, and resistance temperature detectors.
  • Mechanisms for obtaining bath temperature data from the metal bath 22 include continuous bath measurement, manual measurement, manual measurement, automated measurement, ultrasonic measurement, and probing.
  • the temperature data obtained at steps A and B are preferably mapped to a calculated lance and nozzle assembly 14 elevations 20 via an algorithm as such elevations 20 relating to an operating range at Step C.
  • the operating ranges preferably correspond to a particular processing step in the metal making process of the vessel 12.
  • Step C may comprise a feedback loop, and process operations data module 26 may be connected to and/or informed by an operator's station.
  • Data comprising module 26, including process operations data may include data from the primary and sub systems of the vessel 12, including anti-slop systems as well as normal operations practices input provided by operators at human machine interfaces.
  • the data processing unit 18 preferably calculates the lance and nozzle assembly 14 elevation 20 and amends the elevation 20 based on the temperature readings in the operating range at Step C.
  • This step comprises the lance elevation control 24, which receives input from the processing unit 18.
  • the elevation 20 is preferably the distance between the lance and nozzle assembly 14 tip and the surface of the molten metal bath 22.
  • Step E can be effectuated by various means including automated controls and manual operation controls as prompted by the lance elevation control 24.
  • the present invention will maintain the elevation 20 at an optimal level depending on the operational stage of the vessel 12.
  • the lance 14 can be alarmed for manual adjustment override, or it can be programmed to automatically adjust to a proper lance 14 height 20 to prevent damaging or dunking the lance 14 tip in relation to the steel bath 22.
  • steps A-E can comprise a wired or wireless transmission of data.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Claims (10)

  1. Verfahren zum Betreiben und/oder Positionieren einer Strahlrohr- und Düsenanordnung (14) relativ zu einem Metallbad (22) in einem Gefäß (12), wobei das Verfahren Folgendes umfasst:
    Bereitstellen eines ersten Temperatursensors (16) nahe einer Spitze der Strahlrohr- und Düsenanordnung, wobei der erste Temperatursensor (16) von der Strahlrohr- und Düsenanordnung untergebracht ist, wobei der erste Temperatursensor (16) konfiguriert ist, um eine Temperatur der Spitze der Strahlrohr- und Düsenanordnung (14) festzustellen, und wobei die Temperatur in Spitzentemperaturdaten umgewandelt wird;
    Bereitstellen eines zweiten Temperatursensors (16) an oder innerhalb des Gefäßes (12), wobei der zweite Temperatursensor (16) konfiguriert ist, um eine Temperatur des Metallbads (22) festzustellen, und wobei die Temperatur in Badtemperaturdaten umgewandelt wird;
    Übertragen der Spitzentemperaturdaten und der Badtemperaturdaten an eine Verarbeitungseinheit (18);
    Austauschen von Informationen zwischen der Verarbeitungseinheit (18) und einem Verarbeitungsbetriebsdatenmodul (26), wobei die Informationen die Spitzentemperaturdaten, die Badtemperaturdaten und Verarbeitungsbetriebsdaten umfassen;
    Zuordnen der Spitzentemperaturdaten und der Badtemperaturdaten an eine entsprechende aktive Höhe (20) der Strahlrohr- und Düsenanordnung;
    Vergleichen der aktiven Höhe (20) mit einer bevorzugten Höhe der Strahlrohr- und Düsenanordnung; und
    Bewegen der Strahlrohr- und Düsenanordnung (14) von der aktiven Höhe (20) auf die bevorzugte Höhe.
  2. Verfahren nach Anspruch 1, wobei der erste Temperatursensor (16) ein Thermoelement, eine Infrarotkamera, ein Pyrometer oder ein Widerstandstemperaturdetektor ist.
  3. Verfahren nach Anspruch 1, wobei der zweite Temperatursensor (16) einen Ultraschallsendeempfänger umfasst.
  4. Verfahren nach Anspruch 1, wobei die Spitzentemperaturdaten und/oder die Badtemperaturdaten drahtlos an die Verarbeitungseinheit (18) übertragen werden.
  5. Verfahren nach Anspruch 1, wobei das Bewegen der Strahlrohr- und Düsenanordnung (14) von der aktiven Höhe (20) auf die bevorzugte Höhe automatisiert ist, um ein Eintauchen der Spitze der Strahlrohr- und Düsenanordnung (14) in das Metallbad (22) zu verhindern.
  6. System (10) zum Betreiben und/oder Positionieren einer Strahlrohr- und Düsenanordnung (14) relativ zu einem Metallbad (22) in einem Gefäß (12), wobei das System (10) Folgendes umfasst:
    eine Strahlrohr- und Düsenanordnung (14), die eine erste Höhe (20) in einem Gefäß (12) aufweist, das ein Metallbad (22) umfasst;
    einen ersten Temperatursensor (16) nahe einer Spitze der Strahlrohr- und Düsenanordnung (14), wobei der erste Temperatursensor (16) von der Strahlrohr- und Düsenanordnung (14) untergebracht ist, wobei der erste Temperatursensor (16) konfiguriert ist, um eine Temperatur der Spitze der Strahlrohr- und Düsenanordnung (14) festzustellen, und wobei die Temperatur in Spitzentemperaturdaten umgewandelt wird;
    einen zweiten Temperatursensor (16) an oder innerhalb des Gefäßes (12), wobei der zweite Temperatursensor (16) konfiguriert ist, um eine Temperatur des Metallbads (22) festzustellen, und wobei die Temperatur in Badtemperaturdaten umgewandelt wird;
    eine Verarbeitungseinheit (18), die konfiguriert ist, um Daten zu empfangen und auszutauschen, wobei die Daten die Spitzentemperaturdaten und die Badtemperaturdaten umfassen;
    ein Verarbeitungsbetriebsdatenmodul (26), wobei das Modul (26) konfiguriert ist, um Daten mit der Verarbeitungseinheit (18) auszutauschen;
    eine Strahlrohrhöhensteuerung (24), wobei die Strahlrohrhöhensteuerung (24) konfiguriert ist, um Daten von der Verarbeitungseinheit (18) zu empfangen, und wobei die Strahlrohrhöhensteuerung (24) konfiguriert ist, um die Strahlrohr- und Düsenanordnung (14) von der ersten Höhe (20) auf eine zweite Höhe zu bewegen.
  7. System nach Anspruch 6, wobei der erste Temperatursensor (16) ein Thermoelement, eine Infrarotkamera, ein Pyrometer oder ein Widerstandstemperaturdetektor ist.
  8. System nach Anspruch 6, wobei der zweite Temperatursensor (16) einen Ultraschallsendeempfänger umfasst.
  9. System nach Anspruch 6, wobei die Spitzentemperaturdaten und/oder die Badtemperaturdaten drahtlos an die Verarbeitungseinheit (18) übertragen werden.
  10. System nach Anspruch 6, wobei die Strahlrohrhöhensteuerung (24) automatisiert ist, um ein Eintauchen der Spitze der Strahlrohr- und Düsenanordnung (14) in das Metallbad (22) zu verhindern.
EP19849785.1A 2018-08-17 2019-08-19 Verfahren und vorrichtung zur steuerung des betriebs und der position einer lanzen- und düsenanordnung in einem metallschmelzbad in einem gefäss Active EP3687666B1 (de)

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US201862719277P 2018-08-17 2018-08-17
PCT/US2019/047116 WO2020037327A1 (en) 2018-08-17 2019-08-19 Controlling operation and position of a lance and nozzle assembly in a molten metal bath in a vessel

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EP3687666A1 EP3687666A1 (de) 2020-08-05
EP3687666A4 EP3687666A4 (de) 2020-08-26
EP3687666B1 true EP3687666B1 (de) 2021-10-27

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CA (1) CA3081366C (de)
ES (1) ES2900126T3 (de)
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