EP0183920A2 - Procédé pour l'utilisation d'un four de réchauffage et four de réchauffage pour billettes, blocs ou similaires - Google Patents

Procédé pour l'utilisation d'un four de réchauffage et four de réchauffage pour billettes, blocs ou similaires Download PDF

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Publication number
EP0183920A2
EP0183920A2 EP85110663A EP85110663A EP0183920A2 EP 0183920 A2 EP0183920 A2 EP 0183920A2 EP 85110663 A EP85110663 A EP 85110663A EP 85110663 A EP85110663 A EP 85110663A EP 0183920 A2 EP0183920 A2 EP 0183920A2
Authority
EP
European Patent Office
Prior art keywords
furnace
hot
gases
heating
mixing chamber
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.)
Ceased
Application number
EP85110663A
Other languages
German (de)
English (en)
Other versions
EP0183920A3 (fr
Inventor
Heinrich Dipl.-Ing. Patalon
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.)
Didier Engineering GmbH
Original Assignee
Didier Engineering GmbH
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 Didier Engineering GmbH filed Critical Didier Engineering GmbH
Publication of EP0183920A2 publication Critical patent/EP0183920A2/fr
Publication of EP0183920A3 publication Critical patent/EP0183920A3/fr
Ceased legal-status Critical Current

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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
    • F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B9/3005—Details, accessories or equipment specially adapted for furnaces of these types arrangements for circulating gases
    • 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
    • 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
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/10—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by hot air or gas
    • 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
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path
    • F27B9/22—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path on rails, e.g. under the action of scrapers or pushers
    • 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 specially adapted for 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 specially adapted for furnaces of these types
    • F27B9/38—Arrangements of devices for charging
    • 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 specially adapted for furnaces of these types
    • F27B2009/305—Particular conformation of the furnace
    • F27B2009/3055—Non-uniform section through the length of the furnace
    • 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 specially adapted for furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • F27B2009/3607—Heaters located above the track of the charge
    • F27B2009/3615—Burner in the ceiling directed vertically downwards
    • 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 specially adapted for furnaces of these types
    • F27B9/38—Arrangements of devices for charging
    • F27B2009/382—Charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2001/00—Composition, conformation or state of the charge
    • F27M2001/15—Composition, conformation or state of the charge characterised by the form of the articles
    • F27M2001/1539—Metallic articles
    • F27M2001/1547—Elongated articles, e.g. beams, rails
    • F27M2001/1552—Billets, slabs

Definitions

  • the invention relates to a method for operating a reheating furnace according to the preamble of the main claim and to a reheating furnace for slabs, blocks or the like according to the preamble of claim 5.
  • Modern reheating furnaces must therefore be matched to this cooperative heating and operating sequence in terms of their process engineering and construction. In such modern reheating furnaces, it should be possible to heat cold heating material and heating and equalization of the temperature of hot material with temperatures from 1100 to 1260 ° C. Furthermore, there should be sufficient and quickly usable storage space to reduce the production influence of downtimes.
  • the heating of hot material with temperatures of 1100 to 1260 ° C mostly focuses only on the edges and marginal zones, since these areas are subject to increased cooling on the way from the continuous caster to the heating furnace.
  • the invention has for its object to provide a reheating furnace, which allows an individual hot gas control depending on the heat, but at the same time has an integrated in the heating system, sufficiently large storage zone to act as a buffer zone and so as to influence the production of Reduce downtimes.
  • the furnace according to the invention it is possible to heat cold material which is only present in a proportion of 10% of the products. At the same time the heating can be done from medium-warm material at temperatures from 400 to 1110 ° C, and finally it is possible to achieve the heating and the compensation of material with temperatures 1100 to 1260 o C.
  • 1 denotes a heating furnace designed as a walking beam furnace, in which a corresponding walking beam conveyor device is provided for the actual heating material 2.
  • the heating material 2 is fed to the heating furnace 1 on the feed side via a charging machine 4, the feed side being able to be closed by a corresponding door 17.
  • the charging machine 4 can in Wasserge Drive in cooled raceways 3 of the furnace, this area being referred to as storage zone 5, which results in a storage space which can store approximately 50% or more of the hourly furnace reference power.
  • the water-cooled raceways 3, which, with the interposition of the impellers, support the charging machine 4, permit a considerable extension of the storage zone 5 known per se.
  • an exhaust manifold 6 On the top of the heating furnace 1 and on the back of the same, an exhaust manifold 6 is provided. 7 designates a hot gas fan, which is arranged, for example with respect to the path of the exhaust gases, behind a recuperator and which, via a corresponding line 18, feeds the gases withdrawn from the exhaust gas manifold 6 to a mixing chamber 8, into which the schematically indicated burners 9 open.
  • the mixing chamber 8 is equipped with a hot gas outflow opening 11 which leads to the furnace interior 10.
  • the hot gas outflow opening 11 is connected to one or more hot gas channels 13 which have outflow openings 12 which then open into the furnace chamber 10.
  • the hot material 2 located in the furnace chamber 10 is washed around by the hot gases and heated to be ready for rolling.
  • the hot gas temperature is always set in such a way that, compared to the maximum temperature of the material to be heated, there is only a slight temperature difference outside the more cooled edge zones, which is not sufficient to overheat those parts of the heat material which have a significantly higher temperature than the edge zones.
  • a hot gas temperature of 1260 - 1270 ° C is set at a surface temperature of the material to be heated outside the peripheral zones of 1250 ° C. This prevents harmful overheating.
  • the cooled peripheral zones of the material to be heated are heated to approximately 1250 ° C. in technically justifiable reheating times, FIG. 4 showing a corresponding temperature distribution.
  • a cooling device 15 can also be provided between the exhaust gas manifold 6 and the hot gas fan 7, and the cooling medium, for example air, is only applied to it when the maximum limit temperature of the recirculated exhaust gases, for example 700 ° C., is reached.
  • the cooling medium for example air
  • the furnace is equipped with two exhaust manifolds 6, which are arranged next to one another at a certain distance.
  • the first exhaust manifold in the direction of the feed-removal side could then only be used by the hot gas fan 7 for the return, while the second exhaust manifold could work on the recuperator and the chimney.
  • the system is also suitable for heating cold or medium-warm material.
  • the lower furnace is also heated by the hot gas channels 13.
  • the exhaust gas quantity recirculation is then largely throttled or switched off completely to increase the hot gas temperature.
  • burners 16 can be switched on at the upper furnace, so that a corresponding Lei performance increase of the entire heating system is achievable.
  • the burners 9 and 16 are generally not connected to the exhaust gas recirculation system, although direct exposure of each burner to recirculated exhaust gases would also be possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Tunnel Furnaces (AREA)
EP85110663A 1984-11-02 1985-08-24 Procédé pour l'utilisation d'un four de réchauffage et four de réchauffage pour billettes, blocs ou similaires Ceased EP0183920A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3440048A DE3440048C1 (de) 1984-11-02 1984-11-02 Nachwaermofen fuer Brammen oder Bloecke
DE3440048 1984-11-02

Publications (2)

Publication Number Publication Date
EP0183920A2 true EP0183920A2 (fr) 1986-06-11
EP0183920A3 EP0183920A3 (fr) 1987-06-16

Family

ID=6249311

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110663A Ceased EP0183920A3 (fr) 1984-11-02 1985-08-24 Procédé pour l'utilisation d'un four de réchauffage et four de réchauffage pour billettes, blocs ou similaires

Country Status (3)

Country Link
US (1) US4629418A (fr)
EP (1) EP0183920A3 (fr)
DE (1) DE3440048C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274206A3 (en) * 1987-01-07 1989-08-16 British Gas Plc Heating stock in a heating chamber

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2766742B1 (fr) * 1997-07-31 1999-09-24 Stein Heurtey Dispositif de transfert entre une premiere enceinte de prechauffage et une seconde enceinte de rechauffage
CN119222995B (zh) * 2024-12-05 2025-03-14 安徽陶芯科半导体新材料有限公司 一种应用于dcb覆铜陶瓷基板生产用的网带式气氛烧结炉

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3148868A (en) * 1960-03-24 1964-09-15 United States Steel Corp Reheating furnace
US3212763A (en) * 1964-03-05 1965-10-19 United States Steel Corp Reheating furnace
US3540706A (en) * 1969-02-19 1970-11-17 Salem Brosius Inc Heating furnace with skid rails
LU65915A1 (fr) * 1972-08-17 1974-02-21
JPS5154813A (en) * 1974-11-08 1976-05-14 Chugai Ro Kogyo Kaisha Ltd Marukohenkanetsuro
DE2713014C2 (de) * 1977-03-24 1983-09-08 Westerhoff, Heinz, Dipl.-Ing., 4330 Mülheim Vorrichtung zum Kühlen der Auflagen für das Wärmgut eines Wärmofens
JPS58105468U (ja) * 1982-01-13 1983-07-18 中外炉工業株式会社 アツプセツト付パイプの連続式熱処理炉
DE3339585C1 (de) * 1983-11-02 1987-11-12 Didier Engineering Gmbh, 4300 Essen Wärmofen zum Nachwärmen von Röhren, Sonderprofilen und dergleichen Wärmgut

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274206A3 (en) * 1987-01-07 1989-08-16 British Gas Plc Heating stock in a heating chamber

Also Published As

Publication number Publication date
US4629418A (en) 1986-12-16
EP0183920A3 (fr) 1987-06-16
DE3440048C1 (de) 1986-03-27

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Inventor name: PATALON, HEINRICH, DIPL.-ING.