EP2767598B1 - Verfahren zum Betrieb einer Sauerstoffblaslanze in einem metallurgischen Gefäß und Messsytem zur Ermittlung dabei verwendeter Messsignale - Google Patents

Verfahren zum Betrieb einer Sauerstoffblaslanze in einem metallurgischen Gefäß und Messsytem zur Ermittlung dabei verwendeter Messsignale Download PDF

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Publication number
EP2767598B1
EP2767598B1 EP14152053.6A EP14152053A EP2767598B1 EP 2767598 B1 EP2767598 B1 EP 2767598B1 EP 14152053 A EP14152053 A EP 14152053A EP 2767598 B1 EP2767598 B1 EP 2767598B1
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EP
European Patent Office
Prior art keywords
lance
blowing lance
sensor
pressure
gas
Prior art date
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Application number
EP14152053.6A
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German (de)
English (en)
French (fr)
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EP2767598A1 (de
Inventor
Pavlo GRYGOROV
Hans-Jürgen ODENTHAL
Jochen SCHLÜTER
Norbert Uebber
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SMS Group GmbH
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SMS Group GmbH
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—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
    • C21C5/4606—Lances or injectors
    • 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
    • C21C5/4613—Refractory coated lances; Immersion lances
    • 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
    • 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
    • F27B3/08—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
    • F27B3/085—Arc furnaces
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • 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
    • F27D2003/162—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel
    • F27D2003/163—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel the fluid being an oxidant
    • F27D2003/164—Oxygen
    • 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
    • F27D2003/169—Construction of the lance, e.g. lances for injecting particles
    • 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
    • F27D2019/004—Fuel quantity
    • F27D2019/0043—Amount of air or O2 to the burner
    • 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
    • F27D2021/0007—Monitoring the pressure

Definitions

  • the invention is directed to a method for operating a blowgun blowing a gas, in particular oxygen blowing lance, in a metallurgical vessel, wherein the preferably replaceable lance head of the lance has at least one supersonic nozzle. Furthermore, the invention is directed to a measuring system for determining the operation of a blowing gas blowing lance, in particular oxygen blowing, in a metallurgical vessel used for process control measurement signals, the measuring system a lance, preferably oxygen blowing lance, with a at least one supersonic nozzle having, preferably interchangeable lance head and comprises an evaluation and / or process control unit receiving and processing the measurement signals.
  • EAF electric arc furnace
  • CONARC Arcing
  • SAF Submerge Arc Furnace reduction furnace
  • Vacuum treatment plants such as VOD (Vacuum Oxygen Decarburization) - or RH (Ruhrstahl-Heraeus) plants.
  • VOD Vacuum Oxygen Decarburization
  • RH Raeus
  • a lance head there are usually a plurality of convergent-divergent nozzles arranged at predetermined angles which accelerate the gas to supersonic speed.
  • the convergent-divergent nozzles are called supersonic nozzles or Laval nozzles.
  • the gas typically exits at about twice the speed of sound and with a high momentum and then strikes the molten metal.
  • an oscillating Blemmulde is generated and the inflated gas ensures an intensive decarburization reaction.
  • a foamed slag is formed on the molten metal.
  • the geometry of a Laval nozzle or a supersonic nozzle can according to the isentropic Stromfadentheorie only for a single value - namely their ideal operating point or design point - with respect to the inlet pressure p 0 and the inlet temperature T 0 of the supersonic nozzle, and the static Counterpressure p A be designed in the metallurgical vessel.
  • the inlet pressure p 0 is therefore also in this ideal operating point as a design pressure and the inlet temperature T 0 is referred to in this ideal operating point as the design temperature. Only when the supersonic nozzle is operated at its ideal operating point, the expanded gas flow is firmly against the nozzle wall until it leaves the nozzle and acceleration of the gas to supersonic velocity is achieved.
  • a replaceable lance head which, depending on the application, includes several convergent-divergent supersonic nozzles or Laval nozzles to accelerate the gas to supersonic speed.
  • a lance head can be used, inter alia, in the following metallurgical vessels or aggregates: in BOF and AOD converters, in SIS (Siemag Injection System) injectors for electric arc furnaces (EAF), in reduction furnaces (SAF) and vacuum systems (RH, VOD ).
  • the geometry of a supersonic nozzle or Laval nozzle, both with respect to the immediate inlet pressure p 0 , the design pressure of the respective supersonic nozzle, and the inlet temperature T 0 , the respective design temperature of a supersonic nozzle, exclusively to an optimum operating point of the respective supersonic nozzle at a static back pressure p A are designed in the respective metallurgical vessel or aggregate. Only when the two process variables design pressure / inlet pressure and inlet temperature / design temperature are maintained in converter operation, a supersonic nozzle or Laval nozzle operates at its optimum operating point and the nozzle only slightly wears.
  • the pilot pressure p VS and the volume flow of the gas are measured in practical operation on a valve station providing the gas for the lance. These sizes are usually used to design the ultrasonic nozzle.
  • the exact pressure loss ⁇ p verl is theoretically difficult to determine because this one Compressible pressure loss calculation over all components under consideration of the exact routing is required.
  • the necessary process variables p 0 , T 0 and p A are always known only as approximate values for the nozzle design. Whether the respective ultrasonic nozzle or Laval nozzle actually works in practical steelworks operation at the design point or ideal operating point is uncertain. But lance durability and process stability are worsening.
  • the oxygen jet emerging from a lance ignites upon contact with molten pig iron. Since the converter or the respective metallurgical vessel is filled not only with pig iron, but frequently also with coolant such as steel scrap, the oxygen jet emerging from the lance can also be thrown back by steel scrap whose temperature for ignition is not sufficiently high. Very often, the combustion of oxygen does not start immediately with the start of the blowing process. However, it is very important to know the exact time of ignition because the start of the associated decarburization reaction of the respective molten metal bath is decisive for the process control. The ignition timing may also be different for each nozzle of a multi-hole lance, depending on the location of the scrap and the position of the molten pig iron. Here, a differentiated knowledge of the location and time of ignition would allow a correspondingly accurate differentiation between used and unused oxygen.
  • a method for operating an oxygen blowing lance in a metallurgical vessel in which by means of a self-sufficient measuring device that performs without external leads or leads a pressure measurement and / or a temperature measurement over time resolved and stores the corresponding measured values, the pressure and the temperature measured at the entrance of a supersonic nozzle of a lance.
  • a self-contained measuring device also referred to as a "data logger”
  • data logger is inserted into the lance head, then measures the pressure and / or the temperature over its (battery) life and stores this data.
  • the self-sufficient measuring device is then removed from the Blas lanzenkopf and with the help of the read out measurement data, a calibration curve is created. On the basis of this calibration curve, the operation of the then self-sufficient measuring device no longer having oxygen blowing lance is controlled.
  • the disadvantage of using data loggers is that the pressure loss Ap get engaged that during operation each adjusting inlet pressure p 0 t and each adjusting for the ongoing operation inlet temperature T 0 t can be only subsequently determined after the lance was removed. A continuous current detection of the inlet pressure p 0t and the inlet temperature T 0t during the blowing process does not take place, so that it is not ensured that the ultrasonic nozzle of the lance is operated during operation at its ideal operating point.
  • the measurement signals obtained give the conditions in the area of the Blaslanzenspitze only inaccurate again.
  • the deflections of the lance are not optimally detected.
  • the invention has for its object to provide a solution that provides a continuous detection of blowing during operation of a gas blowing lance, In particular oxygen blowing lance, operating parameter measuring signals used in a metallurgical vessel for process control allows.
  • this object is achieved in that by means of at least one lance in the supersonic nozzle arranged detector or sensor during operation of the lance, especially during a blowing process, preferably Sauerstoffblasreaes, especially continuously, in the lance head of the inlet pressure p 0t and / or the inlet temperature T 0t of the gas at the at least one supersonic nozzle and / or the oscillation amplitude A and / or the oscillation frequency ⁇ of the lance and / or the ignition timing of the ignition in the oxygen blowing process and / or the location of the ignition detected in the oxygen blowing process and / or is measured and / or the obtained during the operation of the lance of a connected to the at least one detector or sensor evaluation and / or process control unit preferably supplied online and the Steuerun g the operation of the lance is / are provided.
  • the above object is achieved in a measuring system of the type described in more detail by the fact that at least one detector or sensor is arranged in the lance head in the region of the at least one supersonic nozzle, which is in line communication with the evaluation and / or process control unit and during the Operating the lance, in particular during a blowing process, preferably oxygen blowing process, in particular continuously, in the lance head, the inlet pressure p 0t and / or the inlet temperature T 0t of the gas at the at least one supersonic nozzle and / or the oscillation amplitude A and / or the oscillation frequency ⁇ of the lance and / or the ignition timing of the ignition during the oxygen blowing process and / or the location of the ignition in the oxygen blowing detected and / or measures and the one or more obtained measuring signal (s) during operation of the blowing lance to the at least one detector or sensor connected evaluation and / or process control unit preferably online feeds and provides for controlling the operation of the lance.
  • the invention is therefore based in its core on arranging in the head of the lance one or more detector (s) and / or sensor (s), which during operation, i.
  • the lance in their position in the metallurgical vessel working or operating position metrologically record operating parameters and continuously supply the obtained measurement signals during operation of an evaluation and / or process control unit and provide for controlling the operation of the lance.
  • the measurement signals currently obtained in each case the operating state with respect to the respective operating parameter, can then be used directly for process control during ongoing operation of the blowing lance.
  • the current inlet pressure p o of the gas at the entrance of the at least one supersonic nozzle of the lance is detected and / or measured.
  • the inlet temperature T 0t of the gas at the entrance of the at least one supersonic nozzle of the lance is detected and / or measured.
  • These operating parameter measuring signals determined in the first aspect and / or the second aspect of the invention are then fed directly to an evaluation and / or process control unit, preferably online, and provided for process control of the operation of the blowing lance.
  • an evaluation and / or process control unit preferably online, and provided for process control of the operation of the blowing lance.
  • This makes it possible, for example, by adjusting the valve pressure p VS to regulate the current in the lance head at the entrance of a supersonic nozzle adjusting inlet pressure p 0t and set so that it the design pressure p 0 at least substantially and / or approximately, so with a possibly small Deviation, equivalent.
  • a supersonic nozzle - and upon provision of a detector or sensor at the entrance of each supersonic or Laval nozzle of a lance - all supersonic nozzles always at least almost in their design state (design point), ie in or on operate at their ideal operating point.
  • Continuous detection of the inlet pressure p 0t and the inlet temperature T 0t during a blowing process thus enables dynamic adjustment of the pressure p VS at the valve station during the blowing process, thus operating the lance head at its design point and minimizing nozzle wear can.
  • the respectively current entry pressure p o and the respective current entry temperature T o are measured inside the lance, ie in the lance head, during the blowing process.
  • This time-dependent pressure and temperature measurement takes place with the aid of detectors and / or sensors.
  • the measurement data is transmitted via a cable or wirelessly to a connected evaluation and / or process control unit, for example a PC.
  • the energy supply of the detectors and / or sensors can be done by the cable or a battery or by means of an energy harvesting module.
  • pressure and possibly temperature sensors for determining the current inlet pressure p 0t and the current inlet temperature T 0t of the oxygen or blowing gas are thus installed in the lance according to these first two aspects of the invention.
  • the pressure or admission pressure p VS at the valve station supplying the blowing gas or the oxygen should be measured.
  • the inlet pressure p VS at the valve station can be set so that at the input of one or all supersonic nozzle (s) or Laval nozzle (s) of the blowing lance is present an inlet pressure p 0 t, which corresponds to the design pressure p 0th In this case, lance head wear is minimized.
  • the size T 0t is not necessary for the actual operation, but the design temperature T 0 is required as a theoretical design size in the nozzle design.
  • the static pressure p A in the metallurgical vessel can not be determined in this way.
  • the measured data ie the determined operating parameter measurement signals, can be transmitted by a cable or wirelessly, the latter for example by means of a radio module installed in the lance, to an evaluation and / or process control unit, for example a computer, in particular a PC, which can be used by the operating personnel Available.
  • the static pressure p A in the metallurgical vessel plays only a minor role for the correct design and thus the regulation of the operation of the ultrasonic nozzle (s) in or at its ideal operating point, since it usually fluctuates only moderately around the ambient pressure (1.01 bar ⁇ 0.2 bar). If the pressure p VS at the valve station is also continuously measured, the pressure loss ⁇ p verl between the valve station and the entry of the gas into the lance head are also continuously determined during the blowing process.
  • the method according to the invention is characterized in that by means of at least one pressure sensor arranged in the lance head in the region of the at least one supersonic nozzle during operation of the lance, in particular during a blowing process, preferably oxygen blowing process , in particular continuously, in the lance head of the inlet pressure p 0t of the gas at the entrance of the at least one supersonic nozzle is detected and / or measured, and in particular characterized in that by means of at least one arranged in the lance head in the region of the at least one supersonic nozzle temperature sensor during operation of the lance, in particular During a blowing process, preferably oxygen blowing process, in particular continuously, in the lance head the inlet temperature T 0t of the gas at the entrance of the at least one supersonic nozzle is detected u nd / or measured.
  • the supply pressure p VS of the gas is detected and / or measured at a gas supply station arranged at a distance from the at least one supersonic nozzle, as the invention also envisages.
  • the measurement system is characterized in that at least one pressure sensor is arranged in the lance head in the region of the at least one supersonic nozzle, which is in line communication with the evaluation and / or process control unit and during operation of the lance, in particular during a blowing process, preferably oxygen blowing process, in particular continuously, detects and / or measures the inlet pressure p 0t of the gas at the entrance of the at least one supersonic nozzle in the lance head and the one or more obtained (s)
  • the measuring signal (s) preferably feeds online to the evaluation and / or process control unit connected to the at least one pressure sensor and provides for controlling the operation of the lance and / or at least one temperature sensor in the lance head in the region of the at least one supersonic nozzle is arranged, which is in line with the evaluation and / or process control unit and during operation of the lance, in particular during a blowing process, preferably Sauerstoffblasreaes, in particular
  • the oscillation amplitude A and / or the oscillation frequency ⁇ of the lance, in particular the oxygen lance is detected and measured by means of at least one oscillation sensor installed directly in the lance head during operation of the lance.
  • the measurement in the lance head also takes place at a location close to the mouth as possible, ie in this sense "deep" point of the lance, resulting in a high and compared to the prior art higher significance of the measurement signals.
  • the measurement is preferably carried out by means of a wireless sensor (detector (s) and / or sensor (s)), but also a wired or wired arrangement is possible.
  • a wireless sensor detector (s) and / or sensor (s)
  • s sensor
  • the power supply of the wireless sensor can be done using batteries, rechargeable batteries or an energy harvesting module.
  • this is characterized in that by means of at least one vibration sensor arranged in the lance head in the region of the at least one supersonic nozzle during operation of the lance, in particular during a blowing process, preferably oxygen blowing process, in particular continuously, in the lance head, the oscillation amplitude A. and / or the oscillation frequency ⁇ of the lance is detected and / or measured.
  • At least one vibration sensor is arranged in the lance head in the area of the at least one supersonic nozzle, which is in line communication with the evaluation and / or process control unit and during the operation of the lance, in particular during a blowing process .
  • oxygen blowing process in particular continuously, in the lance head, the oscillation amplitude A and / or the oscillation frequency ⁇ of the blowing lance detected and / or measures and the one or more obtained (s) measurement signal (s) during operation of the lance of the connected to the at least one vibration sensor
  • Evaluation and / or process control unit preferably feeds online and provides for controlling the operation of the lance.
  • the vibration sensors arranged in the lance head for determining the oscillation amplitude A and / or the oscillation frequency ⁇ of a gas blowing lance, in particular an oxygen blowing lance is a continuous measurement the amplitude and / or the frequency of the vibrations and, consequently, a monitoring of the slag height in the converter or metallurgical vessel possible.
  • the frequency spectrum is dominated by harmonic natural vibrations of the lance.
  • the lance is enveloped by the slag. This creates and increases a caused by the slag stochastic component of the vibrations. The formation of the decay at the lance tip also changes their mass.
  • the measured oscillation amplitudes A and / or oscillation frequencies ⁇ are also transmitted in particular wirelessly, in particular by radio, to the evaluation and / or control unit, in particular a computer, preferably a PC, which is operable by the operating personnel.
  • the evaluation and / or control unit in particular a computer, preferably a PC, which is operable by the operating personnel.
  • at least one radio module is then assigned to the respective vibration sensor or the vibration sensors and connected to this or this.
  • photodiodes, photodetectors or light sensors are arranged within the lance head, which during a blowing process in the lance head in the ignition of the Oxygen rays detect the occurring optical emissions.
  • CCD Charge Coupled Device
  • CMOS Complementary Metal Oxide Semiconductors
  • the measurement signals determined in this case can then be further processed in the assigned evaluation and / or process control unit. Also in this case, the measurement signal and thus data transmission takes place by a cable or wirelessly by radio.
  • the power supply of wireless optical sensors with the help of batteries, batteries or an energy harvesting module is possible.
  • the light sensors CCD sensors, CMOS sensors
  • the light sensors or such sensors or diodes or detectors having camera installed to determine the timing of the ignition in the oxygen blowing process.
  • it is provided to arrange one or more light sensors in the interior of the lance, preferably in the lance head, in order to be able to determine the exact time of the ignition.
  • the optical emission caused when the oxygen beams are ignited is detected by the sensor or the sensors within the lance in the lance head and the determined measurement signals and associated information are conducted to the evaluation and / or control unit, in particular a computer or PC, with the aid of a cable or wirelessly transmitted.
  • the method is characterized in that by means of at least one in the lance head in the region of the at least one supersonic nozzle arranged light sensor, in particular CCD or CMOS sensor, or at least one camera equipped therewith during operation the lance, in particular during a blowing process, preferably oxygen blowing process, in the lance head, the occurring at an ignition of the oxygen jets (s) optical (s) emission (s) is / are detected.
  • At least one light sensor in particular a CCD or CMOS sensor, or at least one camera equipped therewith is arranged in the lance head in the region of the at least one supersonic nozzle, which line is connected to the evaluation and / or process control unit is in communication and during operation of the lance, in particular during a blowing process, preferably Sauerstoffblasvones, in the lance head, the occurring at an ignition of the oxygen jets optical (n) emission (s) detected and / or measures and / or during the operation of the blowing lance the one or more of the obtained (n) measuring signal (e) preferably the online connected to the at least one light sensor, in particular CCD or CMOS sensor, or the at least one camera evaluation and / or process control unit and provides for controlling the operation of the lance.
  • a blowing process preferably Sauerstoffblasreas
  • an accurate determination of the ignition time can be carried out, this also differentiated according to the individual oxygen jets in each case a supersonic nozzle of a Mehrlochblaslanze associated sensor / detector.
  • a fifth aspect of the invention is directed to detecting and / or measuring the location of ignition in the oxygen blowing process.
  • light sensors in particular CCD or CMOS sensors or detectors, photodiodes or photodetectors or a camera equipped therewith are to be arranged directly in the lance head whose optically receiving sensor surfaces are optically aligned through an orifice of the lance and, in particular, the orifice of an associated supersonic nozzle ,
  • the light sensors thus installed in the lance head serve to determine the location of the ignition during the oxygen blowing process.
  • multiple directional optical sensors or the use of a camera can be next to the ignition so that also determine commonly used Mehrlochblaslanzen the location of the ignition.
  • a light sensor can be assigned to a nozzle.
  • a focal spot is formed, while incidence of the focal spot on scrap no focal spot is formed, so that the respective detected areas with respect to their optical emission (s ).
  • the advantage of the installation inside the lance is that the view opening of the camera or the Sensors are kept free by flushing with oxygen.
  • the measurement signals obtained can then in turn be wired or transmitted by radio to the evaluation and / or control unit, in particular a computer or PC and used there for process control.
  • This fifth aspect of the invention thus consists in detecting the ignition location of the oxygen jet by arranging an optical sensor or detector within a lance in such a way that it can detect the optical emissions of the focal spot within the lance caused by the ignition of the oxygen beams the received measurement signals or information can then be further processed in the associated evaluation and / or control unit.
  • the data transmission is conducted by cable or wirelessly by radio.
  • the power supply of the wireless optical sensor system can take place with the aid of batteries, rechargeable batteries or an energy harvesting module, wherein the detector (s) or sensor (s) are arranged by means of an energy harvesting module arranged in the lance is / are supplied with electrical energy.
  • the inventive method is characterized in that by means of at least one in the lance head in the region of the at least one supersonic nozzle and optically through a mouth opening of the lance continuously aligned light sensor, in particular CCD or CMOS sensor, or at least one equipped camera during operation of the lance, in particular during a blowing process, preferably oxygen blowing process occurring in the lance head outside the lance optical emissions are detected.
  • the measuring system for realizing this fifth aspect of the invention is characterized in that at least one light sensor, in particular a CCD or CMOS sensor, or at least one camera equipped therewith is arranged in the lance head in the region of the at least one supersonic nozzle optical aligned through a mouth opening of the blowing lance and the / is in line with the evaluation and / or process control unit and the detected during the operation of the lance, in particular during a blowing process, preferably Sauerstoffblasreaes, occurring in the lance head outside the lance optical emissions and / or measures and / or during the operation of the blowing lance the at least one of the at least one light sensor (16) or the at least one camera connected to the evaluation and / or process control unit preferably online and to control the operation the lance provides.
  • at least one light sensor in particular a CCD or CMOS sensor, or at least one camera equipped therewith is arranged in the lance head in the region of the at least one supersonic nozzle optical aligned through
  • At least one detector or sensor is associated with each supersonic nozzle or is assigned to a corresponding lance of the measuring system.
  • the method and the measuring system provide that the lance is / are assigned to one or more detector (s) or sensor (s) from the group of pressure sensors, temperature sensors, vibration sensors and / or light sensors, or that the lance has one or more lances a plurality of detector (s) or sensor (s) from the group of pressure sensors, temperature sensors, vibration sensors and / or light sensors.
  • the measurement data transmission to the evaluation unit, for example a PC, and the power supply of the measurement sensors or detectors can be realized for example by a cable.
  • the respective sensor or detector may be equipped with a battery or an energy harvesting module.
  • the method according to the invention is therefore characterized in a further embodiment in that the measurement signal (s) obtained are conducted by the detector and / or sensor by means of a cable arranged in or on the lance or wirelessly by means of a detector and / or Sensor connected and arranged in the lance radio module of the evaluation and / or process control unit is / is supplied.
  • the detector (s) or sensor (s) it is also possible in an advantageous manner for the detector (s) or sensor (s) to be supplied with electrical energy by means of an energy harvesting module arranged in the lance.
  • the measuring system is distinguished by the fact that the detector (s) or sensor (s) are conductively bound by means of a cable arranged in or on the lance or wirelessly by means of a radio module arranged in the lance with the evaluation unit. and / or process control unit is / are connected, wherein in particular the one or more wirelessly connected to the evaluation and / or process control unit (s) detector or sensor (s) is preferably connected to a arranged in the lance energy harvesting module /are.
  • the detectors and / or sensors listed above can thus be arranged equipped with a wireless information and / or energy transmission within the lance.
  • the expense of reinstalling the sensors and / or detectors is less than with wired or wired sensors or detectors.
  • the wirelessly designed in this sense sensors can be equipped to avoid the change of the power source with an energy harvesting power source or an energy harvesting module.
  • In the lance can serve as a source of energy, for example, a generator that draws its energy from the gas flow or the vibration of the lance.
  • the energy can be obtained when using an energy harvesting module, for example, from the resulting from the vibrations of the lance energy.
  • each supersonic nozzle can be associated with a corresponding light sensor or detector. In this way, there is the possibility of a differentiated detection of the ignition of the oxygen jets.
  • the measurement signals detected or measured or determined by the sensors and / or detectors can be evaluated and used for the control of the process and the operation of the underlying model.
  • the Fig. 1 shows a blown lance 2 introduced from above into a metallurgical vessel 1 designed as a converter, in particular an oxygen blowing lance, which, in its operation in the in Fig. 1 shown working position gas blows out on a metal melt 3 located in the metallurgical vessel 1.
  • a blow lance tip forming At the at the presentation in Fig. 1 lower end of the lance 2 is a blow lance tip forming, interchangeable lance head 4 is arranged. Within the lance head 4 more supersonic nozzles are formed, which is indicated by the outgoing from the lance head 4 dashes.
  • the blow lance 2 is connected to a gas feed station 6 via a feed line 5 comprising pipes or hoses, which comprises a valve station 7 by means of which the gas 8 to be discharged from the lance head 4 can be fed controllably to the feed line 5.
  • the gas 8 in the exemplary embodiment is a gas used in the case of oxygen (blowing), ie oxygen or an oxygen-containing gas mixture, for example an argon-oxygen gas.
  • oxygen blowing
  • oxygen-containing gas mixture for example an argon-oxygen gas.
  • nitrogen or a nitrogen-containing gas mixture can be at the valve station 7, a pressure p VS set as a form and adjust. For the process and process control during operation of the lance 2, the pressure p VS is measured continuously.
  • a static (counter) pressure p A In the metallurgical vessel 1 or converter prevails during operation of the lance 2, a static (counter) pressure p A.
  • the individual supersonic nozzles or Laval nozzles of the lance head 4 are designed for an ideal operating point (Design Point), in which the design pressure p 0 and the design temperature T 0 prevail at the entrance of each supersonic nozzle.
  • Design Point an ideal operating point
  • the respectively prevailing inlet pressure p o and the respective prevailing inlet temperature T o are continuously determined and / or measured at the lance head 4 at the entrance of each supersonic nozzle or Laval nozzle by detection.
  • the admission pressure p VS can be set at the valve station 7 so that the correct design pressure p 0 is present as an inlet pressure p 0t at the entrance of each supersonic nozzle or Laval nozzle.
  • a detector or sensor 9a, 9b is in each case assigned to the input of a supersonic nozzle, a number of detectors and / or sensors 9a, 9b corresponding to the number of Laval nozzles or supersonic nozzles is respectively arranged in the lance head 4.
  • FIG. 2 shows a arranged by means of a holder 10 in the lance head 4 detector or sensor 9a, which is connected via a line, in particular a cable 11, with an evaluation and / or control unit, not shown.
  • a detector or sensor 9b use which is connected to an associated radio module 12, with to which the measurement signals detected and / or measured by the detector or sensor 9b are transmitted wirelessly, in particular by radio, to the evaluation and / or control unit (not shown).
  • the radio module 12 comprises a power source in the form of a battery or an energy harvesting module.
  • the measuring signals obtained by means of the at least one detector or sensors 9a, 9b are transmitted continuously to the connected evaluation and / or process control unit online during operation of the blowing lance 4 in the blowing process, where they are provided for controlling the operation of the lance 2 and then also used to control the blowing process.
  • the at least one detector or sensor 9a, 9b is a pressure sensor for determining the inlet pressure p 0t .
  • several or multi-function detectors or sensors 9a, 9b may well be present and arranged in the lance head 4, which are selected from the group of pressure sensors, temperature sensors, vibration sensors and / or light sensors.
  • Vibration sensors arranged in the lance head 4 detect and / or measure the oscillation amplitude A and / or the oscillation frequency ⁇ of the lance 2.
  • Detectors or sensors 9a, 9b designed as light sensors detect optical emissions when oxygen streams are ignited during oxygen blowing.
  • the light sensors may be CCD sensors, CMOS sensors, photodiodes, photodetectors and cameras equipped with these sensors or detectors. With these, the radiation or optical emission occurring in the lance head 4 when igniting an oxygen jet is detected, or the change in the radiation intensity or optical emissions in the lance head 4 occurring when an oxygen jet is ignited detected.
  • the respective detector or sensor 9a, 9b designed in the form of a light sensor can also be equipped and aligned such that it, as shown in FIG Fig. 4 is shown schematically detects the location of the ignition or the ignition 13 or detects.

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  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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EP14152053.6A 2013-02-14 2014-01-22 Verfahren zum Betrieb einer Sauerstoffblaslanze in einem metallurgischen Gefäß und Messsytem zur Ermittlung dabei verwendeter Messsignale Active EP2767598B1 (de)

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UAA201301821A UA113614C2 (xx) 2013-02-14 2013-02-14 Спосіб експлуатації кисневої продувальної фурми в металургійній ємності і вимірювальна система для визначення використовуваних при цьому сигналів вимірювань
DE201310208079 DE102013208079A1 (de) 2013-02-14 2013-05-02 Verfahren zum Betrieb einer Sauerstoffblaslanze in einem metallurgischen Gefäß und Messsytem zur Ermittlung dabei verwendeter Messsignale

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US (1) US20140327192A1 (ko)
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UA (1) UA113614C2 (ko)

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PE20171301A1 (es) * 2014-12-24 2017-08-31 Outotec Finland Oy Sistema y metodo para recolectar y analizar datos relacionados con una condicion operativa en un sistema de reactor con un inyector de lanzado sumergido desde lo alto
AU2015370482B2 (en) * 2014-12-24 2019-04-18 Metso Metals Oy A sensing device for determining an operational condition in a molten bath of a top-submerged lancing injector reactor system
CN107489886B (zh) * 2017-09-29 2020-04-24 四川德胜集团钒钛有限公司 一种冶金工业氧气控制系统
MX2020006972A (es) * 2018-01-29 2020-09-09 Refractory Intellectual Property Gmbh & Co Kg Tapon de purga de gas, sistema de purga de gas, metodo para caracterizacion de un tapon de purga de gas y metodo para purgar un fundido metalico.
EP3567370A1 (de) * 2018-05-08 2019-11-13 Primetals Technologies Austria GmbH Lanzensonde mit abgabe von referenzspannungen
ES2900126T3 (es) * 2018-08-17 2022-03-15 Berry Metal Co Método y aparato para controlar la operación y la posición de un conjunto de lanza y tobera en un baño de metal fundido en un recipiente
CN111235340B (zh) * 2020-03-24 2021-10-19 河钢乐亭钢铁有限公司 一种转炉氧气射流效果在线监测方法
CN112708721A (zh) * 2020-09-23 2021-04-27 钢铁研究总院 一种转炉氧枪管道压力损失的测试装置和测试方法
CN113048794A (zh) * 2021-03-22 2021-06-29 中国恩菲工程技术有限公司 智能诊断喷枪
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Publication number Publication date
DE102013208079A1 (de) 2014-08-14
UA113614C2 (xx) 2017-02-27
KR101616393B1 (ko) 2016-04-28
KR20140131259A (ko) 2014-11-12
EP2767598A1 (de) 2014-08-20
US20140327192A1 (en) 2014-11-06

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