EP0199703A2 - Installation pour chauffer de l'acier à la température de façonnage à chaud - Google Patents

Installation pour chauffer de l'acier à la température de façonnage à chaud Download PDF

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Publication number
EP0199703A2
EP0199703A2 EP86890061A EP86890061A EP0199703A2 EP 0199703 A2 EP0199703 A2 EP 0199703A2 EP 86890061 A EP86890061 A EP 86890061A EP 86890061 A EP86890061 A EP 86890061A EP 0199703 A2 EP0199703 A2 EP 0199703A2
Authority
EP
European Patent Office
Prior art keywords
furnace
flue gas
preheating furnace
combustion air
burners
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP86890061A
Other languages
German (de)
English (en)
Other versions
EP0199703A3 (fr
Inventor
Aktiengesellschaf Voest-Alpine
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voestalpine AG
Original Assignee
Voestalpine AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voestalpine AG filed Critical Voestalpine AG
Publication of EP0199703A2 publication Critical patent/EP0199703A2/fr
Publication of EP0199703A3 publication Critical patent/EP0199703A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C21D1/52—Methods of heating with flames
    • 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
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/028—Multi-chamber type furnaces
    • 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
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases
    • 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
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/40—Arrangements of controlling or monitoring 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
    • F27B19/00—Combinations of furnaces of kinds not covered by a single preceding main group
    • F27B19/04—Combinations of furnaces of kinds not covered by a single preceding main group arranged for associated working
    • 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

Definitions

  • the invention relates to a system for heating steel material to the hot forming temperature, with a preheating furnace and a preheating furnace combined therewith, wherein a transport device is provided between the inlet side of the preheating furnace and the outlet side of the preheating furnace and a flue gas duct leading from the preheating furnace to the preheating furnace is provided.
  • a system of this type is known from DE-A -2 706 345.
  • a preheating and reheating furnace By arranging a preheating and reheating furnace in series, the throughput of warmed steel is increased and the economy of heating the steel is improved, etc. especially by introducing the flue gas from the heating furnace into the preheating furnace.
  • a fan is provided in the flue gas line leading from the heating furnace to the preheating furnace for transporting the flue gas, so that the temperature of the flue gas must not exceed a certain level, since otherwise the fan will be damaged.
  • the system known from DE-A -2 706 345 only serves to warm up cold steel.
  • the aim is to subject the steel to be hot-formed as soon as possible after it has been produced, that is, without prior cooling, directly to the hot-forming process.
  • slabs, billets or blooms are to be subjected to further hot shaping in order to save energy by using the heat contained in the steel material by the casting process.
  • the invention aims to avoid these disadvantages and difficulties and has as its object to create a system of the type described in which cold steel or steel with a higher temperature, but a lower temperature than the hot forming temperature, can be used and in which an optimal one It is possible to use the flue gases generated in the heating furnace.
  • the transport device can be loaded from the preheating furnace on the one hand and from the outside on the other, that the preheating furnace is equipped with several high-speed burners and that the flue gas line opens into a region surrounding the jet of high-speed burners at the outlet openings of the high-speed burners, whereby hot flue gas can be drawn in from the heating furnace due to the suction effect of the high-speed burners.
  • a preferred embodiment, in which the heat content of the flue gases is used particularly well, is characterized in that the furnace interior of the preheating furnace is formed in two parts, both parts of the furnace interior being equipped with high-speed burners and the second part of the - viewed in the direction of passage of the steel material
  • Furnace interior has a flue gas discharge line, which leads to the high-speed burners of the first part of the furnace interior in the direction of passage of the steel material and opens into an area surrounding the fuel jet of the high-speed burners, and furthermore expediently the flue gas discharge line of the second part of the furnace interior is provided near its inlet end.
  • the latter measure ensures a particularly uniform heating of the steel material.
  • a heat exchanger is provided in the flue gas discharge line supplying the preheating furnace to the preheating furnace, through which combustion air from the combustion air supply flows, which after heating in the heat exchanger is fed to the burners in the reheating furnace.
  • a heat exchanger is advantageously provided in the flue gas discharge line of the preheating furnace, through which cold air flows, which on the one hand leads to the high-speed burners provided in the preheating furnace by means of a combustion air supply line and, on the other hand, to the heaters provided in the flue gas discharge of the preheating furnace burners provided in the heating furnace can be fed.
  • a further combustion air supply line leads into the combustion air supply line at a point between the branch to the high-speed burners of the preheating furnace and the heat exchanger provided in the flue gas discharge line of the reheat furnace, whereby the system can be easily adapted to the respective use of cold steel material or steel material of higher temperature is.
  • the combustion air supply line leading to the burners of the reheating furnace has a combustion air blow-off line which opens into the flue gas discharge line, which leads from the heating furnace to the preheating furnace, after the heat exchanger.
  • the combustion air blow-off device advantageously opens into the flue gas discharge line by means of a propellant nozzle, as a result of which the combustion air serves as a propellant gas for the flue gas stream which is fed to the preheating furnace.
  • FIG. 1 shows a schematically illustrated installation for heating steel material
  • FIG. 2 shows a high-speed burner in axial section
  • FIG. 3 shows a vertical section through a preheating furnace according to line 111-111 of FIG 1 and 4 show an expanded system for preheating, reheating and post-heating.
  • a transport device 3 for conveying and inserting the steel material 4 to be heated into the preheating furnace 1 leads to the inlet side of the preheating furnace 1.
  • a further transport device 5 is provided, by means of which the already preheated steel material 4 can be brought into the heating furnace 2 is.
  • a further transport device 6 by means of the steel material 4 of higher temperature to the transport device 5 leading from the preheating furnace to the heating furnace or directly to the input opening of the heating furnace 2, so that the steel material 4 of higher temperature bypassing the preheating furnace 1 directly into the Heating oven 2 can be used.
  • the steel material passes through the preheating furnace 1 and then the heating furnace 2, or only the heating furnace 2 alone.
  • the preheating furnace is for heating with high-speed burners 7, etc. so-called pulse burners.
  • One of these high-speed burners 7 is shown in section in FIG. 2.
  • the furnace top 8 or side wall (depending on the arrangement of the high-speed burners 7) is penetrated by a burner block 9 which has a passage opening 10 which narrows towards the interior of the furnace.
  • the actual burner 11 is provided on the outside of the burner block 9 and is connected to a fuel gas supply line 12 and to a combustion air supply line 13.
  • On the inside of the burner block there is a nozzle block 14 which has a central through-opening 16 which is aligned with the axis 15 of the passage opening 10 and into which a side inlet opening 17 opens at the end of the burner block.
  • the passage opening 16 is provided at the location of the mouth of the side inlet opening 17 with a radial extension 18 surrounding the mouth of the passage opening 10. In the outflow direction of the fuel gases, this radial enlargement 18 is followed by a rounded constriction 19, which is followed by a conical part 21 of the passage opening 16, which widens towards the furnace interior 20.
  • the burning jet 22 burning in the passage opening 10 and reaching into the passage opening 16 causes a high exit velocity of the fuel gases, causing gas to be sucked in through the side nlass opening 17 and entrainment and ejection of this gas at high speed in the furnace interior 20 according to the injector principle.
  • the side inlet opening 17 is connected to a flue gas duct 23 leading from the heating furnace 2 to the preheating furnace 1.
  • the supply of the high-speed burners 7 with combustion air takes place via the combustion air supply line 13 by means of a fan 24, the combustion air supply line 13 passing through a heat exchanger 25 which is provided in a flue gas discharge line 26 leading away from the preheating furnace 1 and connected to a chimney (not shown).
  • the combustion air supply line 13 also serves to (partially) supply the burners 27 provided in the heating furnace 2. These burners 27 are of conventional construction.
  • a further heat exchanger 29 is provided between the branch 28 to the high-speed burners 7 of the preheating furnace 1 and the burners 27 of the preheating furnace 2, which is interspersed with the flue gas discharge line 23 leading from the preheating furnace 2 to the preheating furnace 1 (see FIG. 4). .
  • combustion air supply line 13 also opens between the. Branch 28 to the high-speed burners 7 of the preheating furnace 1 and the heat exchanger 29 of the flue gas from the preheating furnace 2 to the preheating furnace 1 leading to the flue gas discharge line 23 a further combustion air supply line 31 acted upon by a fan 30. Combustion air is additionally supplied through this combustion air supply line 31 when cold steel 4 is introduced , since the high-speed burners 7 in this case consume all or a large part of the air which is supplied by the fan 24 via the combustion air supply line 13.
  • combustion air blow-off line 32 From the combustion air supply line 13 branches off, after the heat exchanger 29 provided in the flue gas discharge line 23 of the heating furnace 2, a combustion air blow-off line 32, which can be regulated by means of a control flap as a function of the temperature of the combustion air, which is measured by means of a temperature sensor.
  • the combustion air blow-off line 32 opens into a driving nozzle 33 which is installed in the flue gas from the heating furnace 2 into the preheating furnace 1 leading flue gas discharge line 23.
  • the combustion air thus acts as a propellant for the flue gas stream which is fed to the preheating furnace 1.
  • the flue gas emerging from the heating furnace 2 at approximately 1100 ° C. is fed to the high-speed burners 7 at 700 to 800 ° C.
  • its furnace interior 20 is formed in two parts by a separating weir 34 which extends close to the steel material 4 used.
  • the steel material 4 is continuously moved through the two parts 20 ', 20 "of the furnace interior 20 of the preheating furnace 1 by means of a conveyor, not shown, for example a walking beam conveyor.
  • a flue gas discharge line 36 is provided on the bottom side, but this does not open into a chimney, but the flue gas becomes the high-speed burners arranged in the conveying direction in the first part 20 'of the furnace interior 20 7, e.g. in the same way as is illustrated in Fig. 2.
  • the flue gas opens into an area surrounding the gas jet of the high-speed burners, whereby it is sucked by the high-speed burners 7 from the second part, as seen in the conveying direction 20 "of the furnace interior is suctioned off.
  • This embodiment shown in Fig. 3 allows a very - fast and effective preheating of the steel material 4, so that the preheating furnace 1 has only a very short length despite high performance.
  • FIG. 4 shows an expanded system for heating steel material 4 to the hot forming temperature, which can be used universally and meets all requirements.
  • two reheating furnaces 37 are provided, the input openings 38 of which lie on the transport device 6 leading to the steel material of higher temperature to the heating furnace.
  • the outlet openings 47 of the reheating furnaces are located on a transport device 39 which guides the finished steel material from the heating furnace to the hot forming device, for example to the rolling mill.
  • the flue gas flowing out of the reheating furnaces 37 is led in each case via flue gas lines 40 and heat exchangers 41 to the flue gas discharge line 23 leading the flue gas of the heating furnace 2 to the preheating furnace 1.
  • the heat exchangers 41 of the reheating furnaces 37 serve to preheat the combustion air supplied to the burners 43 by means of fans 42.
  • some of the flue gas from the reheating furnaces 37 or all of the flue gas the reheating furnaces 37 are fed to a separate chimney 46 equipped with a fan 45 via a waste heat boiler 44, in which steam is generated.
  • the system shown in FIG. 4 enables the use of cold, warm and hot steel material, the hot steel material, which has a temperature almost at the level of the hot forming temperature, only being led through the reheating furnaces.
  • the heating furnace 2 and the preheating furnace 1 serve to heat steel material to the rolling temperature, which for technological or other reasons cannot be used directly in the reheating furnaces 37.
  • the rolling mill is supplied with steel material during the operating phases, during which the reheating furnaces 37 cannot deliver steel material ready for rolling due to the lack of very hot steel material.
  • the insert is carried out bypassing the preheating furnace 1 directly into the heating furnace 2 by removing the steel material 4 is applied to the transport device 5 leading from the preheating furnace to the heating furnace.
  • the combustion air supply line 31 opening into the combustion air supply line 13 is shut down; the combustion air is then supplied via the two heat exchangers 25 and 29 provided in the combustion air supply line 13 and heated to approximately 550 ° C.
  • the high-speed burners 7 of the preheating furnace 1 are not in operation in this case, i.e. neither exposed to combustion gas nor combustion air.
  • the flue gases from the heating furnace 2 are either guided past the preheating furnace, for example via the flue gas line 40, the waste heat boiler 44, the suction fan 45 to the chimney 46, or via the mixing zone of the burners 7 through the preheating furnace 1, the flue gas duct 26 Recuperator 25 sucked in by the induced draft fan and conveyed to the chimney. This prevents the preheating furnace 1 from cooling, so that it can be put back into operation at any time or without any appreciable heating-up time after the insertion of cold steel.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Tunnel Furnaces (AREA)
EP86890061A 1985-04-04 1986-03-13 Installation pour chauffer de l'acier à la température de façonnage à chaud Withdrawn EP0199703A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0102385A AT381790B (de) 1985-04-04 1985-04-04 Anlage zum aufwaermen von stahlgut auf warmformgebungstemperatur
AT1023/85 1985-04-04

Publications (2)

Publication Number Publication Date
EP0199703A2 true EP0199703A2 (fr) 1986-10-29
EP0199703A3 EP0199703A3 (fr) 1987-05-27

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Application Number Title Priority Date Filing Date
EP86890061A Withdrawn EP0199703A3 (fr) 1985-04-04 1986-03-13 Installation pour chauffer de l'acier à la température de façonnage à chaud

Country Status (4)

Country Link
EP (1) EP0199703A3 (fr)
JP (1) JPS61231116A (fr)
CN (1) CN86102037A (fr)
AT (1) AT381790B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2154947A1 (es) * 1996-11-21 2001-04-16 Morales Mateos Matias Metodo para mejorar el rendidmiento de hornos de coccion en continuo y estructuras de horno resultantes.
WO2010099929A1 (fr) * 2009-03-02 2010-09-10 Sms Siemag Ag Procédé et installation de fabrication et/ou d'usinage d'une brame ou d'une bande de matériau métallique
CN102242249A (zh) * 2011-06-30 2011-11-16 首钢总公司 一种改善钢坯加热质量的加热设备及使用方法
EP2437018A1 (fr) * 2010-10-04 2012-04-04 Frank Orlowski Four tunnel et brûleur pour la cuisson de briques
CN105283728A (zh) * 2012-11-19 2016-01-27 施瓦兹有限公司 用于金属板热处理的辊底式炉和方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009026251A1 (de) * 2009-07-24 2011-02-03 Thyssenkrupp Steel Europe Ag Verfahren und Vorrichtung zum energieeffizienten Warmumformen
CN103382520B (zh) * 2013-07-04 2015-04-29 富通集团有限公司 一种铜杆生产方法及其铜板预热炉
CN112984673B (zh) * 2021-03-30 2022-06-17 博特尔(重庆)电力技术有限公司 一种模块化容错式新风空调机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1199301B (de) * 1961-03-24 1965-08-26 Didier Werke Ag Waermofen fuer metallisches Gut
DE2259639A1 (de) * 1971-12-06 1973-06-20 Kawasaki Heavy Ind Ltd Nachwaermofen oder vorrichtung mit vorerhitzung
DE2846818A1 (de) * 1978-06-21 1980-05-08 Itoh Iron & Steel Works Co Ltd Verfahren zur waermebehandlung von kalten stahlbloecken und/oder heissen stahlbloecken sowie vorrichtung zur durchfuehrung des verfahrens
AT361962B (de) * 1977-02-11 1981-04-10 Mannesmann Ag Ofenanordnung zum erwaermen von brammen
JPS59190327A (ja) * 1983-04-08 1984-10-29 Sumitomo Metal Ind Ltd 熱間スラブ保熱方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1199301B (de) * 1961-03-24 1965-08-26 Didier Werke Ag Waermofen fuer metallisches Gut
DE2259639A1 (de) * 1971-12-06 1973-06-20 Kawasaki Heavy Ind Ltd Nachwaermofen oder vorrichtung mit vorerhitzung
AT361962B (de) * 1977-02-11 1981-04-10 Mannesmann Ag Ofenanordnung zum erwaermen von brammen
DE2846818A1 (de) * 1978-06-21 1980-05-08 Itoh Iron & Steel Works Co Ltd Verfahren zur waermebehandlung von kalten stahlbloecken und/oder heissen stahlbloecken sowie vorrichtung zur durchfuehrung des verfahrens
JPS59190327A (ja) * 1983-04-08 1984-10-29 Sumitomo Metal Ind Ltd 熱間スラブ保熱方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Band 9, Nr. 45 (C-268)[1768], 26. Februar 1985; & JP-A-59 190 327 (SUMITOMO KINZOKU KOGYO K.K.) 29-10-1984 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2154947A1 (es) * 1996-11-21 2001-04-16 Morales Mateos Matias Metodo para mejorar el rendidmiento de hornos de coccion en continuo y estructuras de horno resultantes.
WO2010099929A1 (fr) * 2009-03-02 2010-09-10 Sms Siemag Ag Procédé et installation de fabrication et/ou d'usinage d'une brame ou d'une bande de matériau métallique
TWI404582B (zh) * 2009-03-02 2013-08-11 Sms Siemag Ag 金屬材料構成的金屬板或金屬帶的製造及／或加工的方法與設備
EP2437018A1 (fr) * 2010-10-04 2012-04-04 Frank Orlowski Four tunnel et brûleur pour la cuisson de briques
CN102242249A (zh) * 2011-06-30 2011-11-16 首钢总公司 一种改善钢坯加热质量的加热设备及使用方法
CN102242249B (zh) * 2011-06-30 2013-02-06 首钢总公司 一种改善钢坯加热质量的加热设备及使用方法
CN105283728A (zh) * 2012-11-19 2016-01-27 施瓦兹有限公司 用于金属板热处理的辊底式炉和方法
CN105283728B (zh) * 2012-11-19 2017-04-26 施瓦兹有限公司 用于金属板热处理的辊底式炉和方法

Also Published As

Publication number Publication date
CN86102037A (zh) 1986-11-26
ATA102385A (de) 1986-04-15
EP0199703A3 (fr) 1987-05-27
AT381790B (de) 1986-11-25
JPS61231116A (ja) 1986-10-15

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RIN1 Information on inventor provided before grant (corrected)

Inventor name: DIE ERFINDER HABEN AUF IHRE NENNUNG VERZICHTET.