EP2327802B1 - Détermination du niveau d'un récipient métallurgique. - Google Patents

Détermination du niveau d'un récipient métallurgique. Download PDF

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Publication number
EP2327802B1
EP2327802B1 EP20100014451 EP10014451A EP2327802B1 EP 2327802 B1 EP2327802 B1 EP 2327802B1 EP 20100014451 EP20100014451 EP 20100014451 EP 10014451 A EP10014451 A EP 10014451A EP 2327802 B1 EP2327802 B1 EP 2327802B1
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EP
European Patent Office
Prior art keywords
bath
charge
transmitter
measuring body
receiver
Prior art date
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Active
Application number
EP20100014451
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German (de)
English (en)
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EP2327802A1 (fr
Inventor
Frank Wagener
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SMS Siemag AG
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SMS Siemag AG
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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
    • C21C5/4673—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
    • F27D21/0028—Devices for monitoring the level of the melt

Definitions

  • the invention relates to a method and a device for accurate and rapid determination of the constant at the same bath volume by the wear of the refractory lining from batch to batch and within a batch changing level of a bath covered with a slag layer metal bath in a metallurgical vessel, for example in a converter a blow-molder.
  • the refractory vessel lining When using metallurgical vessels for steel production, the refractory vessel lining is exposed to a constant wear by the metal and slag melt through which its inner volume increases accordingly and the bath level drops while a constant bath volume.
  • the knowledge of this lowering of the bath level is important for the operation of the metallurgical vessel, since, for example, a defined distance of the lance position to the melt must be maintained for an optimal process. It is therefore necessary to determine the height of the bath level at regular intervals, so that, for example, the blowing position of the lance and the sampling position of the sublance can each be redefined.
  • various methods are known.
  • Another method of determining the level of the bath is a sub-level probe that registers the temperature difference between the steel bath and the slag layer. The height of the bath surface is then determined via the travel path of the sublance probe.
  • this option is only possible in steelworks equipped with a sublance.
  • a method for determining the current level of the bath level in an electric arc furnace or in a liquid steel converter wherein a measuring probe is lowered down to the bath level and forms an electrical measuring circuit with the metallic vessel shell.
  • the electrical measuring circuit is tuned to conductivity values of the slag layer, the liquid metal and the refractory material.
  • the measuring probe Depending on the distance traveled by the measuring probe per unit time and a change in the electrical conductivity of slag and / or liquid metal occurring when the slag layer and / or the liquid metal is touched, the measuring probe generates a measuring signal, whereby the level of the bath level is displayed.
  • WO 2005/059527 discloses a method for analyzing a melt.
  • a method for measuring the height of the bath level, the oxygen partial pressure and the temperature of a below a slag layer metal bath in a container in particular known in a converter, one consisting of an EMF cell for measuring the oxygen partial pressure and a thermocouple, by a protective cap protected measuring probe is immersed in the metal bath from a starting position located outside the container to a predetermined depth as a fixed point and after the melting of the protective cap, the oxygen partial pressure and the temperature of the metal bath are measured.
  • the oxygen partial pressure and the temperature are measured as a function of the distance traveled by the measuring probe in the metal bath from the selected fixed point and until a change in the measured oxygen partial pressure and Temperature from the fixed point traveled distance is recorded as a measure of the Badstands sleep.
  • the object is achieved with the characterizing features of claim 1, characterized in that the determination of the height of the bath level during a batch with a wireless transmitter-receiver system according to the RFID method (Radio Frequency Identification) is performed by measuring the radio wave Signal strength between at least one battery-powered RF transmitter, which is integrated in a floating on the metal bath measuring body and at least one fixed above the metallurgical vessel RF receiver, wherein the increasing distance between the RF transmitter and the RF receiver reduction takes place Radio wave signal strength is used for the current distance determination.
  • RFID method Radio Frequency Identification
  • the measuring body with integrated battery-operated RF transmitter can either be placed manually from above, for example via the doghouse door, or via a material supply system or via the sublance robot, into the metallurgical vessel and onto the metal bath.
  • This task and the subsequent determination of the current Badspielgel Actually is advantageously carried out at an optimal time at the end of the metallurgical treatment time at which all additives and the scrap used are melted and a bath calming has occurred.
  • the invention consists of the RF transmitter enveloping measuring body made of a heat-resistant ceramic material, including refractory materials count and is designed as a sphere, its density is selected so that the ball floats exactly on the dividing line between the metal bath and the slag layer, the bath mirror.
  • the measuring body and the integrated RF transmitter are designed for a single measurement with a relatively short service life, so that they are destroyed during their residence time on the metal bath. Any existing remains are removed by the slag from the metallurgical vessel with. Higher service life of the measuring body are not economical, since they can only be achieved with higher quality expensive materials, leaving open whether the RF transmitter is then still functional for a second batch and at what cost the measuring body can be removed from the metallurgical vessel again.
  • the RF receiver required for receiving the radio waves emanating from the RF transmitter and their signal strength is installed stationarily above the metallurgical vessel, for example in the exhaust system. Due to the stationary position of the RF receiver, the change in the signal strength emanating from the freely movable measuring body with its RF transmitter, converted to a distance calculation between the measuring body and the RF receiver and thus the height of the bath level can be determined. In conjunction with a vessel profile measuring system then the exact determination of the instantaneous amount of melt is feasible.
  • the drawing figure shows a sectional view of a plant scheme with a arranged in a "Doghouse" 5 serving as a metallurgical vessel converter 1.
  • the converter 1 is delivered with a refractory lining 2 and in the illustrated operating state in its lower part with a Metal bath 3, which is covered with a slag layer 4.
  • Above the converter 1 is an exhaust system 6 with a lower opening 11 for receiving the exhaust gases generated in the converter 1.
  • a filler neck 12 is arranged with a funnel 13, through which the measuring body 9 passes into the exhaust system and can be fed through the lower opening 11 in free fall directly to the metal bath 3.
  • more task options are available.
  • a material addition system is used for the measuring object, consisting of a bottom open container 17 with a plurality of measuring bodies 9, a conveyor belt 15 and a chute 14, with each one or more measuring body 9 in the transport direction 7, 7 ', 7 " can be promoted to the funnel 13.
  • the sublance robot 8 shown in the drawing figure at the top left can also be used to discharge the measuring body 9 into the funnel 13, wherein the sublance robot 8 removes a measuring body from the container 16 which is arranged in reach and drops it into the funnel 13.
  • the introduced by one of the possibilities shown in the converter 1 measuring body 9 is arranged according to its set density below the slag layer 4 in a stable floating position on the bath level 20 of the metal bath 3, as shown in the drawing figure.
  • an RF receiver 10 is installed fixed above the converter 1 in the lower part of the exhaust system 6. During the entire service life of a measuring body 9 with RF transmitter, the signal arriving at the RF receiver 10, depending on the distance between the measuring body 9 and the RF receiver 10 different signal strength, registered and converted in an (not shown) evaluation unit in a current distance value.
  • the invention is not limited to the illustrated embodiment. Depending on the metallurgical process to be carried out and the size of the metallurgical vessel, it may be necessary to use several measuring bodies during a batch, which is why a corresponding supply of measuring bodies should be present. Also, depending on local circumstances, installation of more than one RF receiver could prove useful to eliminate the sources of interference affecting the signal strength of the radio wave signal. But even then, the simple system structure according to the invention makes possible a use for all metallurgical vessels.

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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)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Claims (6)

  1. Procédé pour la détermination exacte et rapide de la hauteur de niveau du bain qui se modifie, à un volume du bain simultanément constant, via l'usure du revêtement réfractaire, d'une charge à l'autre et au sein d'une charge, d'un bain métallique (3) recouvert d'une couche de laitier (4) dans une cuve métallurgique, caractérisé en ce que la détermination de la hauteur de niveau du bain (20) est mise en oeuvre, au cours d'une charge, avec un système émetteur-récepteur sans fil conformément au procédé RFID (identification par radiofréquence), par la mesure de l'intensité des signaux des ondes radio entre au moins un émetteur RF à piles qui est intégré dans un corps de mesure (9) flottant sur le bain métallique (3) et avec au moins un récepteur RF (10) disposé au-dessus de la cuve métallurgique, la réduction de l'intensité des signaux des ondes radio proportionnelle à l'écart croissant entre l'émetteur RF et le récepteur RF (10) étant utilisée pour la détermination momentanée de l'écart.
  2. Procédé selon la revendication 1, caractérisé en ce que le corps de mesure (9) est appliqué, soit manuellement, soit via un système d'addition de matière ou via le sous-robot à lance (8) à partir du haut dans la cuve métallurgique et sur le bain métallique (3).
  3. Procédé selon la revendication 2, caractérisé en ce que l'application du corps de mesure (9) et la détermination qui s'y raccorde de la hauteur momentanée de niveau du bain sont mises en oeuvre à un moment optimal à la fin du temps de traitement métallurgique, à laquelle tous les additifs et la mitraille incorporés ont été mis en fusion et à laquelle le bain s'est calmé.
  4. Dispositif pour la détermination exacte et rapide du niveau du bain qui se modifie, à un volume du bain simultanément constant, via l'usure du garnissage réfractaire d'une charge à l'autre et au sein d'une charge, d'un bain métallique (3) recouvert d'une couche de laitier (4) dans une cuve métallurgique, par exemple dans un convertisseur (1), en particulier pour la mise en oeuvre du procédé selon les revendications 1 à 3, caractérisé par un système émetteur-récepteur sans fil intégré, conformément au procédé RFID (identification par radiofréquence)
    • comprenant au moins un récepteur RF (10) disposé à demeure au-dessus de la cuve métallurgique, par exemple au-dessus du convertisseur (1), dans la niche d'enfournement ;
    • un système d'évaluation relié au récepteur RF (10) ;
    • et avec chaque charge, au moins un corps de mesure (9) librement mobile, comprenant un émetteur RF intégré.
  5. Dispositif selon la revendication 4, caractérisé en ce que le corps de mesure (9) est fabriqué à partir d'une matière céramique résistant à la chaleur, dont font également partie des matières réfractaires, et est réalisé sous la forme d'une bille dont la densité est sélectionnée de telle sorte que la bille (9) flotte exactement sur la ligne de séparation entre le bain métallique (3) et la couche de laitier (4), au niveau du bain (20).
  6. Dispositif selon la revendication 4 ou 5, caractérisé en ce que le corps de mesure (9) et l'émetteur RF intégré sont conçus uniquement pour une seule mesure avec une courte durée de vie, si bien qu'ils peuvent être détruits lors de leur séjour sur le bain métallique (3), des résidus éventuellement présents pouvant être éliminés via l'évacuation du laitier à partir de la cuve métallurgique.
EP20100014451 2009-11-11 2010-11-10 Détermination du niveau d'un récipient métallurgique. Active EP2327802B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910052778 DE102009052778A1 (de) 2009-11-11 2009-11-11 Bestimmung der Badspiegelhöhe in metallurgischen Gefäßen

Publications (2)

Publication Number Publication Date
EP2327802A1 EP2327802A1 (fr) 2011-06-01
EP2327802B1 true EP2327802B1 (fr) 2014-05-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100014451 Active EP2327802B1 (fr) 2009-11-11 2010-11-10 Détermination du niveau d'un récipient métallurgique.

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EP (1) EP2327802B1 (fr)
DE (1) DE102009052778A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010035412A1 (de) * 2010-08-25 2012-03-01 Sms Siemag Ag Verfahren und Vorrichtung zur spektroskopischen Temperatur- und Analysebestimmung von flüsssigen Metallbädern in metallurgischen Gefäßen, insbesondere Konvertern
DE102012100936A1 (de) * 2012-02-06 2013-08-08 Endress + Hauser Gmbh + Co. Kg Verfahren und Vorrichtung zur Messung eines Füllstandes einer Flüssigkeit in einem Behälter
EP2853607A1 (fr) 2013-09-25 2015-04-01 Siemens VAI Metals Technologies GmbH Détermination d'une hauteur de niveau de bain d'une fonte ou d'une distance entre une lance mobile et la hauteur du niveau du bain
DE102016209238A1 (de) * 2016-05-27 2017-11-30 Sms Group Gmbh Vorrichtung und Verfahren zum Erfassen einer Förderrate eines flüssigen Materials

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3822705A1 (de) 1988-07-05 1990-01-11 Thyssen Stahl Ag Verfahren zur messung der hoehe des badspiegels eines metallbades in einem behaelter
CA2038825A1 (fr) * 1990-03-30 1991-10-01 Akio Nagamune Appareil de mesure en four du niveau de laitier
DE10207395B4 (de) 2002-02-21 2005-02-10 Sms Demag Ag Verfahren und Einrichtung zum Bestimmen der momentanen Flüssigmetall-Badspiegelhöhe in einem metallurgischen Gefäß
DE10352628A1 (de) 2003-11-11 2005-06-23 Ispat Industries Ltd., Taluka-Pen Verfahren und Einrichtung zum Bestimmen der Schmelzbadhöhe von aufeinanderfolgenden Roheisen-Chargen in einem Elektrolichtbogen-Ofen
CA2539844C (fr) * 2003-12-17 2012-01-31 Heraeus Electro-Nite International N.V. Procede pour analyser une matiere fondue, dispositif et capteur a immersion
EP1918703B1 (fr) * 2007-02-07 2015-06-24 Tata Steel UK Limited Contrôle de l'épaisseur de la couche de scorie dans un processus métallurgique par des émissions acoustiques

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Publication number Publication date
EP2327802A1 (fr) 2011-06-01
DE102009052778A1 (de) 2011-05-12

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