WO2007065623A1 - Device for heating at least one continuously cast bar - Google Patents

Device for heating at least one continuously cast bar Download PDF

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Publication number
WO2007065623A1
WO2007065623A1 PCT/EP2006/011625 EP2006011625W WO2007065623A1 WO 2007065623 A1 WO2007065623 A1 WO 2007065623A1 EP 2006011625 W EP2006011625 W EP 2006011625W WO 2007065623 A1 WO2007065623 A1 WO 2007065623A1
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WO
WIPO (PCT)
Prior art keywords
preheat
transfer fluid
main heat
heat transfer
fluid
Prior art date
Application number
PCT/EP2006/011625
Other languages
German (de)
French (fr)
Inventor
Kouhestani Keyhan
Toksoez Izzet
Original Assignee
Kti-Engineering Gbr
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Publication date
Application filed by Kti-Engineering Gbr filed Critical Kti-Engineering Gbr
Priority to EP06818976A priority Critical patent/EP1957682A1/en
Publication of WO2007065623A1 publication Critical patent/WO2007065623A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1213—Accessories for subsequent treating or working cast stock in situ for heating or insulating strands
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
    • F27B2009/122—Preheating
    • 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
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges

Definitions

  • the invention is based on a device for heating at least one continuous casting rod according to the preamble of claim 1.
  • a device for heating continuous casting rods with a main heat transfer unit is already known, which is intended to use a main heat transfer fluid formed by an inflamed natural gas.
  • the device has a preheat transmission unit, which is provided to use a flue gas resulting from the inflamed natural gas.
  • the invention is particularly based on the object of providing a device with which a high degree of efficiency can be achieved. It is solved according to the invention by the features of the independent claims. Further refinements result from the subclaims. Advantages of the invention
  • the invention is based on a device for heating at least one continuous cast rod with at least one main heat transfer unit, which is provided to use a main heat transfer fluid, and with at least one preheat transfer unit.
  • the preheat transfer unit be provided to use at least one different preheat transfer fluid for the main heat transfer fluid.
  • a “differing preheat transmission fluid” is to be understood in particular to mean a fluid which at least does not result from the main heat transmission fluid and / or from the addition of air at least solely by a chemical process. “Provided” is to be understood in particular to be specially equipped and / or designed will.
  • a continuous casting rod is to be understood in particular as a rod-shaped and / or bolt-shaped metal part, such as primarily aluminum continuous casting rods, etc.
  • the preheat transfer fluid can be particularly advantageously matched to its function.
  • a fluid with a heat transfer fluid that is at least essentially resulting from the skin heat transfer fluid, such as flue gas in particular can be used under comparable conditions in comparison to the main heat transfer fluid, and thus the overall efficiency can be increased.
  • the Vor139übertragungsaku is intended to use a liquid at a temperature of 20 0 C and an atmospheric pressure or at a pressure of 1.01325 * 10 5 Pa Vorebenstedtra- supply fluid, thus allowing easy handling achievable is.
  • water should also be understood to mean water vapor and / or a water mixture which preferably consists of at least 50% and particularly preferably at least 80% pure water.
  • a preheat transfer fluid with a high heat transfer coefficient, a high thermal stability and in particular can be used of high environmental compatibility, which can be easily removed without residue from the continuous cast bars and which is inexpensive to buy.
  • the preheating transmission fluid can advantageously be used to clean the continuous cast bar before, during and / or after a preheating process.
  • the preheat transfer unit has at least one pressure vessel for receiving the preheat transfer fluid.
  • a pressure vessel is to be understood in particular as a container in which a pressure of at least 3 bar and preferably of at least 5 bar can be generated.
  • high preheat transfer fluid temperatures in the case of liquid preheat transfer fluid can be particularly advantageously - A -
  • the preheat transfer unit has at least one pump for conveying the preheat transfer fluid, in particular a structurally simple transport of the preheat transfer fluid from a preheat room and / or into the pressure vessel can be realized, in particular if the preheat transfer fluid is a liquid at a temperature of 20 ° C. and atmospheric pressure Has state and the pump is formed by a liquid pump.
  • the preheat transfer fluid can be heated by various heating means and / or heating media which appear to be useful to the person skilled in the art, such as wood, etc.
  • the preheat transfer unit is particularly advantageously provided to carry the preheat transfer fluid with it
  • the efficiency can be increased by the preheat transfer unit having at least one and preferably a plurality of nozzles or, particularly advantageously, a nozzle array for irradiating a continuous cast rod with the preheat transfer fluid.
  • a “nozzle field” is to be understood in particular to mean a field in which nozzles are arranged in several rows and in several columns. drawing
  • FIG. 1 shows a schematic representation of a device according to the invention for heating continuous cast rods 20 and a method that can be carried out with it.
  • the device comprises a main heat transfer unit 10, which is formed by a gas furnace and is intended to use a main heat transfer fluid 12a formed by an ignited gas, namely natural gas.
  • the continuous cast bars 20 are directly irradiated with the ignited main heat transfer fluid 12a.
  • the device has a preheat transfer unit 14.
  • the preheat transfer unit 14 is provided to use a preheat transfer fluid 16 different from the main heat transfer fluid 12a, namely the preheat transfer unit 14 is provided to use water as the preheat transfer fluid 16.
  • the preheat transmission unit 14 has an insulated storage tank 26, a water filter 34, a water pump 22, a pressure tank 18 or a waste heat boiler and a water jet preheating chamber 30 with a nozzle array 24 comprising individual nozzles for irradiating the continuous cast rods 20.
  • the nozzles of the nozzle array 24, viewed in the direction of transport 28 of the continuous casting rods 20, are arranged in a plurality of rows, each of which extends over the circumference of the water jet preheating chamber 30 and thus surround the continuous casting rod 20 in a ring shape in the water jet preheating chamber 30.
  • the water heat pump 22 pumps the preheat transfer fluid 16 " from the storage tank through a channel system and via the water filter 34 of the preheat transfer unit 14 into the pressure tank 18.
  • the pressure tank 18 has a type of instantaneous heater 32, by means of which the preheat transfer fluid 16 is heated via a flue gas 12b resulting from the main heat transfer fluid 12.
  • the flue gas 12b formed by the burned natural gas is led outward from the pressure vessel 18, but could also be used for direct preheating even after the preheat transfer fluid 16 has been heated be.
  • the flue gas is cooled from about 600 0 C to about 25O 0 C, while the Vor139übertragungsfluid 16 is heated under a pressure of about 6 bar of about 75 0 C to 15O 0 C.
  • the heated preheat transfer fluid 16 is shot in the water jet preheating chamber 30 at high pressure via the nozzle array 24 onto the continuous cast rod 20.
  • a dynamic pressure generated under a resulting impact jet acts as a flash Evaporation or evaporation is essentially counteracted by lowering the pressure of the preheat transfer fluid 16, so that exposure temperatures to be expected at least locally which are significantly above the boiling temperature of the preheat transfer fluid 16 or above the boiling temperature of water at normal pressure.
  • the continuously cast bars are pre-heated 20 to about 100 0 C, it that in the subsequent heating process in the formed by the gas furnace main heat transfer unit 10 only to about 100 ° C to about 520 ° C have to be heated.
  • the continuous cast rods 20 are cleaned by the high-pressure radiation with the preheating transfer fluid 16.
  • the preheat transfer fluid 16 that collects at the bottom of the storage container 26 and has a temperature of approximately 75 ° C. is then pumped out again by means of the water pump 22. Contaminations loosened from the continuous casting rods 20 are filtered out of the preheat transmission fluid 16 by means of the water filter 34.
  • the preheat transfer unit 14 has an essentially closed preheat transfer fluid circuit or water circuit, so that a low consumption of preheat transfer fluid 16 is achieved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Furnace Details (AREA)

Abstract

Disclosed is a device for heating at least one continuously cast bar (20). Said device comprises at least one main heat exchanging unit (10) which is designed so as to utilize a main heat transfer fluid (12a), and at least one preheat exchanging unit (14) which is designed so as to utilize at least one preheat transfer fluid (16) that is different from the main heat transfer fluid (12a). Preferably, water is used as a preheat transfer fluid that is sprayed directly onto the continuously cast bar. Furthermore, the preheat transfer fluid is preferably heated by means of flue gas, resulting in great efficiency.

Description

Vorrichtung zum Erwärmen von wenigstens einer Stranggussstan- Device for heating at least one continuous casting
Stand der Technik State of the art
Die Erfindung geht aus von einer Vorrichtung zum Erwärmen von wenigstens einer Stranggussstange nach dem Oberbegriff des Anspruchs 1. Es ist bereits eine Vorrichtung zum Erwärmen von Stranggussstangen mit einer Hauptwärmeübertragungseinheit bekannt, die dazu vorgesehen ist, ein von einem entflammten Erdgas gebildetes Hauptwärmeübertragungsfluid zu nutzen. Ferner weist die Vorrichtung eine Vorwärmeübertragungseinheit auf, die dazu vorgesehen ist, ein aus dem entflammten Erdgas resultierendes Rauchgas zu nutzen. The invention is based on a device for heating at least one continuous casting rod according to the preamble of claim 1. A device for heating continuous casting rods with a main heat transfer unit is already known, which is intended to use a main heat transfer fluid formed by an inflamed natural gas. Furthermore, the device has a preheat transmission unit, which is provided to use a flue gas resulting from the inflamed natural gas.
Der Erfindung liegt insbesondere die Aufgabe zugrunde, eine Vorrichtung bereitzustellen, mit der ein hoher Wirkungsgrad erzielbar ist. Sie wird gemäß der Erfindung durch die Merkmale der unabhängigen Patentansprüche gelöst. Weitere Ausgestaltungen ergeben sich aus den Unteransprüchen. Vorteile der Erfindung The invention is particularly based on the object of providing a device with which a high degree of efficiency can be achieved. It is solved according to the invention by the features of the independent claims. Further refinements result from the subclaims. Advantages of the invention
Die Erfindung geht aus von einer Vorrichtung zum Erwärmen von wenigstens einer Stranggussstange mit wenigstens einer Haupt- Wärmeübertragungseinheit, die dazu vorgesehen ist, ein Haupt- wärmeübertragungsfluid zu nutzen, und mit wenigstens einer Vorwärmeübertragungseinheit . The invention is based on a device for heating at least one continuous cast rod with at least one main heat transfer unit, which is provided to use a main heat transfer fluid, and with at least one preheat transfer unit.
Es wird vorgeschlagen, dass die Vorwärmeübertragungseinheit dazu vorgesehen ist, zu dem Hauptwärmeübertragungsfluid wenigstens ein differierendes Vorwärmeübertragungsfluid zu nutzen. Dabei soll unter einem „differierenden Vorwärmeübertra- gungsfluid" insbesondere ein Fluid verstanden werden, das zumindest nicht allein durch einen chemischen Prozess aus dem Hauptwärmeübertragungsfluid und/oder durch die Beimengung von Luft resultiert. Unter „vorgesehen" soll insbesondere speziell ausgestattet und/oder ausgelegt verstanden werden. Ferner soll unter einer Stranggussstange insbesondere ein stan- genförmiges und/oder bolzenförmiges Metallteil verstanden werden, wie in erster Linie Aluminiumstranggussstangen usw. It is proposed that the preheat transfer unit be provided to use at least one different preheat transfer fluid for the main heat transfer fluid. In this context, a “differing preheat transmission fluid” is to be understood in particular to mean a fluid which at least does not result from the main heat transmission fluid and / or from the addition of air at least solely by a chemical process. “Provided” is to be understood in particular to be specially equipped and / or designed will. Furthermore, a continuous casting rod is to be understood in particular as a rod-shaped and / or bolt-shaped metal part, such as primarily aluminum continuous casting rods, etc.
Mit einer erfindungsgemäßen Vorrichtung kann das Vorwärmeübertragungsfluid besonders vorteilhaft auf seine Funktion abgestimmt werden. Insbesondere kann ein Fluid mit einem im Vergleich zum Hauptwärmeübertragungsfluid und auch einem aus dem Hautwärmeübertragungsfluid zumindest im Wesentlichen resultierenden Wärmeübertragungsfluid, wie insbesondere Rauchgas, bei vergleichbaren Bedingungen höheren Wärmeübergangskoeffizienten eingesetzt werden, und damit kann insgesamt der Wirkungsgrad gesteigert werden. In einer weiteren Ausgestaltung wird vorgeschlagen, dass die Vorwärmeübertragungseinheit dazu vorgesehen ist, ein bei einer Temperatur von 200C und einem Atmosphärendruck bzw. bei einem Druck von 1,01325 * 105 Pa flüssiges Vorwärmeübertra- gungsfluid zu nutzen, wodurch eine einfache Handhabung erzielbar ist. With a device according to the invention, the preheat transfer fluid can be particularly advantageously matched to its function. In particular, a fluid with a heat transfer fluid that is at least essentially resulting from the skin heat transfer fluid, such as flue gas in particular, can be used under comparable conditions in comparison to the main heat transfer fluid, and thus the overall efficiency can be increased. In a further embodiment it is proposed that the Vorwärmeübertragungseinheit is intended to use a liquid at a temperature of 20 0 C and an atmospheric pressure or at a pressure of 1.01325 * 10 5 Pa Vorwärmeübertra- supply fluid, thus allowing easy handling achievable is.
Als Vorwärmeübertragungsfluid können verschiedene, dem Fachmann als sinnvoll erscheinende Fluids verwendet werden, wie beispielsweise verschiedene Öle usw., besonders vorteilhaft wird jedoch Wasser als Vorwärmeübertragungsfluid genutzt. Dabei soll unter „Wasser" auch Wasserdampf und/oder auch ein Wassergemisch verstanden werden, das vorzugsweise aus zumindest 50% und besonders bevorzugt aus zumindest 80% reinem Wasser besteht. Mit Wasser kann ein Vorwärmeübertragungsfluid mit einem hohen Wärmeübergangskoeffizienten, einer hohen thermischen Stabilität und insbesondere einer hohen Umweltverträglichkeit geschaffen werden, das einfach rückstandsfrei von den Stranggussstangen entfernbar ist sowie preisgünstig erhältlich ist. Ferner kann vorteilhaft das Vorwärmeübertra- gungsfluid zur Reinigung der Stranggussstange vor, während und/oder nach einem Vorwärmprozess genutzt werden. Various fluids which appear to be useful to the person skilled in the art can be used as the preheat transmission fluid, for example different oils etc., but water is particularly advantageously used as the preheat transmission fluid. In this context, “water” should also be understood to mean water vapor and / or a water mixture which preferably consists of at least 50% and particularly preferably at least 80% pure water. With water, a preheat transfer fluid with a high heat transfer coefficient, a high thermal stability and in particular can be used of high environmental compatibility, which can be easily removed without residue from the continuous cast bars and which is inexpensive to buy. Furthermore, the preheating transmission fluid can advantageously be used to clean the continuous cast bar before, during and / or after a preheating process.
Ferner wird vorgeschlagen, dass die Vorwärmeübertragungsein- heit wenigstens einen Druckbehälter zur Aufnahme des Vorwärmeübertragungsfluids aufweist. Dabei soll unter einem Druckbehälter insbesondere ein Behälter verstanden werden, in dem ein Druck von zumindest 3 bar und vorzugsweise von zumindest 5 bar erzeugbar ist. Mittels einer entsprechenden Ausgestal- tung können besonders vorteilhaft hohe Vorwärmeübertragungsfluidtemperaturen bei flüssigem VorwärmeübertragungsfIu- - A - It is further proposed that the preheat transfer unit has at least one pressure vessel for receiving the preheat transfer fluid. A pressure vessel is to be understood in particular as a container in which a pressure of at least 3 bar and preferably of at least 5 bar can be generated. Using a corresponding configuration, high preheat transfer fluid temperatures in the case of liquid preheat transfer fluid can be particularly advantageously - A -
id, hohe Strömungsgeschwindigkeiten und hohe Wärmübergangsko- effizienten realisiert werden. id, high flow velocities and high heat transfer coefficients can be realized.
Weist die Vorwärmeübertragungseinheit wenigstens eine Pumpe zur Förderung des Vorwärmeübertragungsfluids auf, kann insbesondere ein konstruktiv einfacher Transport des Vorwärmeübertragungsfluids aus einem Vorwärmeraum und/oder in den Druckbehälter realisiert werden, und zwar insbesondere, wenn das Vorwärmeübertragungsfluid bei einer Temperatur von 200C und Atmosphärendruck einen flüssigen Zustand aufweist und die Pumpe von einer Flüssigkeitspumpe gebildet ist. If the preheat transfer unit has at least one pump for conveying the preheat transfer fluid, in particular a structurally simple transport of the preheat transfer fluid from a preheat room and / or into the pressure vessel can be realized, in particular if the preheat transfer fluid is a liquid at a temperature of 20 ° C. and atmospheric pressure Has state and the pump is formed by a liquid pump.
Das Vorwärmeübertragungsfluid kann von verschiedenen, dem Fachmann als sinnvoll erscheinenden Heizmitteln und/oder Heizmedien erwärmt werden, wie beispielsweise von Holz usw., besonders vorteilhaft ist jedoch die Vorwärmeübertragungseinheit dazu vorgesehen, das Vorwärmeübertragungsfluid mit The preheat transfer fluid can be heated by various heating means and / or heating media which appear to be useful to the person skilled in the art, such as wood, etc. However, the preheat transfer unit is particularly advantageously provided to carry the preheat transfer fluid with it
Rauchgas, insbesondere mit aus dem Hauptwärmeübertragungsfluid resultierendem Rauchgas, zu erwärmen, wodurch eine Abwärme eines Haupterwärmungsprozesses vorteilhaft genutzt, ein zusätzlicher Energieverbrauch vermieden und der Wirkungsgrad gesteigert werden kann. To heat flue gas, in particular with flue gas resulting from the main heat transfer fluid, whereby waste heat from a main heating process is advantageously used, additional energy consumption can be avoided and the efficiency can be increased.
Ferner kann der Wirkungsgrad gesteigert werden, indem die Vorwärmeübertragungseinheit wenigstens eine und vorzugsweise mehrere Düsen bzw. besonders vorteilhaft ein Düsenfeld zur Bestrahlung einer Stranggussstange mit dem Vorwärmeübertragungsfluid aufweist. Unter einem „Düsenfeld" soll dabei insbesondere ein Feld verstanden werden, in dem in mehreren Zei- len und in mehreren Spalten Düsen angeordnet sind. Zeichnung Furthermore, the efficiency can be increased by the preheat transfer unit having at least one and preferably a plurality of nozzles or, particularly advantageously, a nozzle array for irradiating a continuous cast rod with the preheat transfer fluid. A “nozzle field” is to be understood in particular to mean a field in which nozzles are arranged in several rows and in several columns. drawing
Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen. Further advantages result from the following description of the drawing. In the drawing, an embodiment of the invention is shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into useful further combinations.
Beschreibung des Ausführungsbeispiels Description of the embodiment
Figur 1 zeigt eine schematische Darstellung einer erfindungsgemäßen Vorrichtung zum Erwärmen von Stranggussstangen 20 und ein damit durchführbares Verfahren. Die Vorrichtung umfasst eine von einem Gasofen gebildete Hauptwärmeübertragungseinheit 10, die dazu vorgesehen ist, ein von einem entflammten Gas, und zwar Erdgas, gebildetes Hauptwärmeübertragungsfluid 12a zu nutzen. In der Hauptwärmeübertragungseinheit 10 werden die Stranggussstangen 20 direkt mit dem entflammten Hauptwärmeübertragungsfluid 12a bestrahlt. FIG. 1 shows a schematic representation of a device according to the invention for heating continuous cast rods 20 and a method that can be carried out with it. The device comprises a main heat transfer unit 10, which is formed by a gas furnace and is intended to use a main heat transfer fluid 12a formed by an ignited gas, namely natural gas. In the main heat transfer unit 10, the continuous cast bars 20 are directly irradiated with the ignited main heat transfer fluid 12a.
Neben der Hauptwärmeübertragungseinheit 10 weist die Vorrichtung eine Vorwärmeübertragungseinheit 14 auf. Die Vorwärme- Übertragungseinheit 14 ist dazu vorgesehen, ein zu dem Hauptwärmeübertragungsfluid 12a differierendes Vorwärmeübertra- gungsfluid 16 zu nutzen, und zwar ist die Vorwärmeübertragungseinheit 14 dazu vorgesehen, Wasser als Vorwärmeübertra- gungsfluid 16 zu nutzen. Die Vorwärmeübertragungseinheit 14 weist einen isolierten Speicherbehälter 26, einen Wasserfilter 34, eine Wasserpumpe 22, einen Druckbehälter 18 bzw. einen Abhitzekessel und eine Wasserstrahlvorwärmkammer 30 mit einem einzelne Düsen umfas- senden Düsenfeld 24 zur Bestrahlung der Stranggussstangen 20 auf. Die Düsen des Düsenfelds 24 sind in Transportrichtung 28 der Stranggussstangen 20 betrachtet in mehreren Reihen angeordnet, die sich jeweils über den Umfang der Wasserstrahlvorwärmkammer 30 erstrecken und damit die Stranggussstange 20 in der Wasserstrahlvorwärmkammer 30 ringförmig umschließen. In addition to the main heat transfer unit 10, the device has a preheat transfer unit 14. The preheat transfer unit 14 is provided to use a preheat transfer fluid 16 different from the main heat transfer fluid 12a, namely the preheat transfer unit 14 is provided to use water as the preheat transfer fluid 16. The preheat transmission unit 14 has an insulated storage tank 26, a water filter 34, a water pump 22, a pressure tank 18 or a waste heat boiler and a water jet preheating chamber 30 with a nozzle array 24 comprising individual nozzles for irradiating the continuous cast rods 20. The nozzles of the nozzle array 24, viewed in the direction of transport 28 of the continuous casting rods 20, are arranged in a plurality of rows, each of which extends over the circumference of the water jet preheating chamber 30 and thus surround the continuous casting rod 20 in a ring shape in the water jet preheating chamber 30.
Bei einem Verfahren mit der Vorrichtung wird mittels der Wasserpumpe 22 das von Wasser gebildete VorwärmeübertragungsfIu- id 16 "aus dem Speicherbehälter über ein Kanalsystem und über den Wasserfilter 34 der Vorwärmeübertragungseinheit 14 in den Druckbehälter 18 gepumpt. Der Druckbehälter 18 weist eine Art Durchlauferhitzer 32 auf, mittels dessen das Vorwärmeübertra- gungsfluid 16 über ein aus dem Hauptwärmeübertragungsfluid 12a resultierendes Rauchgas 12b erwärmt wird. Das von dem verbrannten Erdgas gebildete Rauchgas 12b wird aus dem Druckbehälter 18 nach außen geführt, könnte jedoch auch nach der Erwärmung des Vorwärmeübertragungsfluids 16 zusätzlich zur direkten Vorwärmung genutzt werden. Im Druckbehälter 18 wird das Rauchgas von ca. 6000C auf ca. 25O0C abgekühlt, während das Vorwärmeübertragungsfluid 16 unter einem Druck von ca. 6 bar von ca. 750C auf 15O0C erhitzt wird. In a method with the device, the water heat pump 22 pumps the preheat transfer fluid 16 " from the storage tank through a channel system and via the water filter 34 of the preheat transfer unit 14 into the pressure tank 18. The pressure tank 18 has a type of instantaneous heater 32, by means of which the preheat transfer fluid 16 is heated via a flue gas 12b resulting from the main heat transfer fluid 12. The flue gas 12b formed by the burned natural gas is led outward from the pressure vessel 18, but could also be used for direct preheating even after the preheat transfer fluid 16 has been heated be. in the pressure vessel 18, the flue gas is cooled from about 600 0 C to about 25O 0 C, while the Vorwärmeübertragungsfluid 16 is heated under a pressure of about 6 bar of about 75 0 C to 15O 0 C.
Das erhitzte Vorwärmeübertragungsfluid 16 wird in der Wasserstrahlvorwärmkammer 30 mit Hochdruck über das Düsenfeld 24 auf die Stranggussstange 20 geschossen. Ein sich unter einem ergebenden Prallstrahl erzeugter Staudruck wirkt einer Flash- Verdampfung bzw. einer Verdampfung im Wesentlichen durch Druckerniedrigung des Vorwärmeübertragungsfluids 16 entgegen, so dass zumindest lokal mit Beaufschlagungstemperaturen zu rechnen ist, die deutlich über der Siedetemperatur des Vor- wärmeübertragungsfluids 16 bzw. über der Siedetemperatur von Wasser bei Normaldruck liegen. In der Wasserstrahlvorwärmkammer 30 werden die Stranggussstangen 20 auf ca. 1000C vorgewärmt, so dass sie im nachgeschalteten Aufheizprozess in der vom Gasofen gebildeten Hauptwärmeübertragungseinheit 10 nur noch von ca. 100°C auf ca. 520°C erhitzt werden müssen. Ferner werden die Stranggussstangen 20 durch das Bestrahlen mit dem Vorwärmeübertragungsfluid 16 mit Hochdruck gereinigt. The heated preheat transfer fluid 16 is shot in the water jet preheating chamber 30 at high pressure via the nozzle array 24 onto the continuous cast rod 20. A dynamic pressure generated under a resulting impact jet acts as a flash Evaporation or evaporation is essentially counteracted by lowering the pressure of the preheat transfer fluid 16, so that exposure temperatures to be expected at least locally which are significantly above the boiling temperature of the preheat transfer fluid 16 or above the boiling temperature of water at normal pressure. In the Wasserstrahlvorwärmkammer 30, the continuously cast bars are pre-heated 20 to about 100 0 C, it that in the subsequent heating process in the formed by the gas furnace main heat transfer unit 10 only to about 100 ° C to about 520 ° C have to be heated. Furthermore, the continuous cast rods 20 are cleaned by the high-pressure radiation with the preheating transfer fluid 16.
Das sich am Boden des Speicherbehälters 26 sammelnde Vorwärmeübertragungsfluid 16, das eine Temperatur von ca. 750C aufweist, wird anschließend wieder mittels der Wasserpumpe 22 abgepumpt. Von den Stranggussstangen 20 gelöste Verschmutzungen werden mittels des Wasserfilters 34 aus dem Vorwärmeübertragungsfluid 16 gefiltert. Die Vorwärmeübertragungseinheit 14 weist einen im Wesentlichen geschlossenen Vorwärmeübertragungsfluidkreislauf bzw. Wasserkreislauf auf, so dass ein geringer Verbrauch an Vorwärmeübertragungsfluid 16 erreicht wird. The preheat transfer fluid 16 that collects at the bottom of the storage container 26 and has a temperature of approximately 75 ° C. is then pumped out again by means of the water pump 22. Contaminations loosened from the continuous casting rods 20 are filtered out of the preheat transmission fluid 16 by means of the water filter 34. The preheat transfer unit 14 has an essentially closed preheat transfer fluid circuit or water circuit, so that a low consumption of preheat transfer fluid 16 is achieved.
04.12.06 Bezugszeichen 12/04/06 reference numerals
10 Hauptwärmeübertragungs einheit 10 main heat transfer unit
12a Hauptwärmeübertra- gungsfluid  12a main heat transfer fluid
12b Rauchgas  12b flue gas
14 Vorwärmeübertragungs- einheit  14 Preheat transfer unit
16 Vorwärmeübertra- gungsfluid  16 preheat transmission fluid
18 Druckbehälter  18 pressure vessels
20 Stranggussstange  20 continuous cast rod
22 Pumpe  22 pump
24 Düsenfeld  24 nozzle field
26 Speicherbehälter  26 storage tanks
28 Transportriehtung 28 Direction of transport
30 Wasserstrahlvorwärmkam mer 30 water jet preheating chamber
32 Durchlauferhitzer 32 instantaneous water heaters
34 Wasserfilter 34 water filter

Claims

Ansprüche Expectations
1. Vorrichtung zum Erwärmen wenigstens einer Strangguss- Stange (20) mit wenigstens einer Hauptwärmeübertragungseinheit (10), die dazu vorgesehen ist, ein Hauptwärmeübertragungsfluid (12a) zu nutzen, und mit wenigstens einer Vorwärmeübertragungseinheit (14), dadurch gekennzeichnet, 1. Device for heating at least one continuous casting rod (20) with at least one main heat transfer unit (10), which is intended to use a main heat transfer fluid (12a), and with at least one preheat transfer unit (14), characterized in that
dass die Vorwärmeübertragungseinheit (14) dazu vorgesehen ist, zu dem Hauptwärmeübertragungsfluid (12a) wenigstens ein differierendes Vorwärmeübertra- gungsfluid (16) zu nutzen.  that the preheat transfer unit (14) is provided to use at least one different preheat transfer fluid (16) for the main heat transfer fluid (12a).
2. Vorrichtung nach Anspruch 1, 2. Device according to claim 1,
dadurch gekennzeichnet,  characterized,
dass die Vorwärmeübertragungseinheit (14) dazu vorgesehen ist, ein bei einer Temperatur von 200C und einem Atmosphärendruck flüssiges Vorwärmeübertra- gungsfluid (16) zu nutzen. that the Vorwärmeübertragungseinheit (14) is provided to a liquid at a temperature of 20 0 C and an atmospheric pressure Vorwärmeübertra- fluid supply (16) to use.
3. Vorrichtung nach Anspruch 2, 3. Device according to claim 2,
dadurch gekennzeichnet,  characterized,
dass die Vorwärmeübertragungseinheit (14) dazu vorgesehen ist, Wasser als Vorwärmeübertragungsfluid (16) zu nutzen.  that the preheat transfer unit (14) is provided to use water as the preheat transfer fluid (16).
4. Vorrichtung nach Anspruch 2 oder 3, 4. Apparatus according to claim 2 or 3,
dadurch gekennzeichnet,  characterized,
dass die Vorwärmeübertragungseinheit (14) wenigstens einen Druckbehälter (18) zur Aufnahme des Vorwärmeübertragungsfluids (16) aufweist.  that the preheat transfer unit (14) has at least one pressure vessel (18) for receiving the preheat transfer fluid (16).
5. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, 5. Device according to one of the preceding claims, characterized in
dass die Vorwärmeübertragungseinheit (14) wenigstens eine Pumpe (22) zur Förderung des Vorwärmeübertragungsfluids (16) aufweist.  that the preheat transfer unit (14) has at least one pump (22) for conveying the preheat transfer fluid (16).
6. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, 6. Device according to one of the preceding claims, characterized in
dass die Vorwärmeübertragungseinheit (14) dazu vorgesehen ist, das Vorwärmeübertragungsfluid (16) mit Rauchgas (12b) zu erwärmen.  that the preheat transfer unit (14) is provided to heat the preheat transfer fluid (16) with flue gas (12b).
7. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, 7. Device according to one of the preceding claims, characterized in that
dass die Vorwärmeübertragungseinheit (14) wenigstens eine Düse zur Bestrahlung der Stranggussstange (20) mit dem Vorwärmeübertragungsfluid (16) aufweist. that the preheat transfer unit (14) has at least one nozzle for irradiating the continuous cast rod (20) with the preheat transfer fluid (16).
8. Vorrichtung nach Anspruch 7, 8. The device according to claim 7,
dadurch gekennzeichnet,  characterized,
dass die Vorwärmeübertragungseinheit (14) ein Düsenfeld (24) aufweist.  that the preheat transmission unit (14) has a nozzle field (24).
9. Verfahren zum Erwärmen von wenigstens einer Stranggussstange (20) , bei dem ein Hauptwärmeübertra- gungsfluid (12a) zur Wärmeübertragung genutzt wird, dadurch gekennzeichnet, 9. A method for heating at least one continuous casting rod (20), in which a main heat transfer fluid (12a) is used for heat transfer, characterized in that
dass zu dem Hauptwärmeübertragungsfluid (12a) wenigstens ein differierendes Vorwärmeübertragungsfluid (16) zur Wärmeübertragung genutzt wird.  that at least one differing preheat transfer fluid (16) is used for heat transfer to the main heat transfer fluid (12a).
10. Verfahren nach Anspruch 9, 10. The method according to claim 9,
dadurch gekennzeichnet,  characterized,
dass als Vorwärmeübertragungsfluid (16) Wasser genutzt wird.  that water is used as the preheat transfer fluid (16).
PCT/EP2006/011625 2005-12-09 2006-12-05 Device for heating at least one continuously cast bar WO2007065623A1 (en)

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DE200510058812 DE102005058812A1 (en) 2005-12-09 2005-12-09 Device for heating at least one continuous casting rod

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EP4317479A1 (en) * 2022-08-04 2024-02-07 IAS GmbH Device for preheating bar-shaped metallic workpieces
CN115888303B (en) * 2023-02-15 2023-06-16 山西高义钢铁有限公司 Comprehensive treatment device and treatment method for sintering flue gas of steel plant

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EP1957682A1 (en) 2008-08-20

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