EP0174589A1 - Dispositif pour le chauffage ou le refroidissement de produits métalliques - Google Patents

Dispositif pour le chauffage ou le refroidissement de produits métalliques Download PDF

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Publication number
EP0174589A1
EP0174589A1 EP85111093A EP85111093A EP0174589A1 EP 0174589 A1 EP0174589 A1 EP 0174589A1 EP 85111093 A EP85111093 A EP 85111093A EP 85111093 A EP85111093 A EP 85111093A EP 0174589 A1 EP0174589 A1 EP 0174589A1
Authority
EP
European Patent Office
Prior art keywords
nozzles
medium
nozzle openings
outflow direction
sectional area
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Withdrawn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
EP85111093A
Other languages
German (de)
English (en)
Inventor
Theodor Dipl.-Ing. Ortmanns
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.)
Otto Junker GmbH
Original Assignee
Otto Junker 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 Otto Junker GmbH filed Critical Otto Junker GmbH
Publication of EP0174589A1 publication Critical patent/EP0174589A1/fr
Withdrawn legal-status Critical Current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 peculiar to furnaces of these types
    • F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases
    • F27B9/3011—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases arrangements for circulating gases transversally
    • 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
    • C21D1/62—Quenching devices
    • C21D1/667—Quenching devices for spray quenching
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
    • 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
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply 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
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply devices
    • F27B2005/161—Gas inflow or outflow
    • F27B2005/162—Gas inflow or outflow through closable or non-closable openings of the chamber walls
    • 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
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B5/16—Arrangements of air or gas supply devices
    • F27B2005/166—Means to circulate the atmosphere
    • F27B2005/167—Means to circulate the atmosphere the atmosphere being recirculated through the treatment chamber by a turbine

Definitions

  • the invention relates to a device for heating or cooling metallic material in the form of strips, plates or blocks, which has a number of nozzles directed against the surface of the material, which are fed with at least one conveying device and at least one pressure channel with a medium stream, and wherein Medium flowing past the metallic material is either fed back to the nozzles in a circular movement or is partially or completely discharged via outflow lines.
  • Such heating and cooling devices are generally known. They are used, for example, in continuous systems. They are also used as ovens or cooling devices known with batch feed. As media are gas, gas mixture, spray and liquids, e.g. B. water, known.
  • the nozzles directed onto the surface of the crop are via pressure channels with a conveying device or several conveying devices, for. B. fans or pumps connected.
  • a conveying device or several conveying devices for. B. fans or pumps connected.
  • outflow channels can be arranged in addition to the nozzles or nozzle arrangements, which can be connected to the suction side of the fans. In these cases, the gas flowing past the surface of the material is sucked in by fans and, if necessary, is fed back to the blowing nozzles after flowing through a heat exchange device.
  • the invention is therefore based on the object of ensuring uniform heat treatment or cooling in devices for heating or cooling of the type mentioned at the beginning over the entire width of the metallic material illuminated by the jet streams.
  • the object according to the invention is achieved in that the total cross-sectional area of the nozzle openings decreases with respect to a plurality of nozzles arranged next to one another in the outflow direction of the medium.
  • the invention is based on the finding that, in the prior art devices for heating or cooling by means of jets of a medium emerging from nozzles, the flow velocity of the medium increases in the outflow direction as a result of the addition of the flows from the individual nozzles.
  • the increased flow velocities lead to an increased heat energy release during cooling or to an increased heat energy absorption during heating on the surface areas of the material in the direction of flow of the medium. This results in uneven cooling or heating of the metallic material, which is particularly evident in a large number of nozzles and in the case of long flow paths of the medium along the surface of the material.
  • the measure of the invention ensures that the flow rate of the treatment gas on the surface of the crop is constant or almost constant, so that the heat transfer or heat removal over the entire crop surface covered by the nozzles is thus even or almost uniform.
  • the decrease in the total cross-sectional area of the nozzle openings can relate to one row of nozzles or several rows of nozzles.
  • the decrease in the total cross-sectional area of the nozzle openings can take place continuously or in stages.
  • An expedient embodiment of the invention consists in that the nozzles are arranged at the same distance from one another and the cross sections of the nozzle openings are reduced in the outflow direction of the medium.
  • Another expedient embodiment of the invention comprises the arrangement of nozzles with the same cross-sectional area of the nozzle openings, but with a distance from one another that increases in the outflow direction.
  • a combination is also expedient in such a way that both the cross sections of the nozzle openings decrease and the distances between the nozzles increase in the gas outflow direction.
  • the furnace 1 shown in FIG. 1 is surrounded on the outside with a heat-insulating wall 2.
  • the interior of the furnace 1 is divided into the heating chamber 3, through which a metal block or a plurality of metal blocks 4 is or are conveyed via rollers 5, and into a pressure channel system 6.
  • a fan 7, which is driven by the electric motor 8, is arranged in the pressure duct system 6.
  • the suction side of the fan is connected to the heating chamber 3 via the opening 9 in the pressure duct system.
  • blow nozzles 10 On both sides of the metal block or the metal blocks 4 there are blow nozzles 10 on the side of the pressure channel system 6 facing the metal block surface, which are arranged in the direction of the opening 9 with an increasing distance from one another. The distances between the nozzles are selected so that the gas velocity on the surface of the metal block or the metal blocks opposite the blowing nozzles is the same or almost the same.
  • the treatment gas is drawn in by the fan 7 through the opening 9 from the heating chamber 3 in the direction of the arrow P1 and fed to the blowing nozzles 10 in the direction of the two arrows P2 via the pressure channel system 6.
  • the treatment gas is heated via suitable heat exchangers (not shown in the drawing) which are attached in the pressure channel system.
  • FIG. 2 shows an example with the suction of the treatment gas below the workpiece transport level, such as that is indicated by the arrow P3.
  • the nozzles are provided with ever smaller nozzle openings in the direction of the furnace bottom.
  • the nozzle openings 11 are reduced from top to bottom in such a way that the same flow velocities of the treatment gas occur on the entire block surface.
  • a nozzle arrangement with spacing between the nozzles increasing downwards can also be selected.
  • FIG. 3 provides for the treatment gas to be extracted from the heating chamber both above and below the metal block to be heated, as indicated by the arrows P4 and P5.
  • the distances between the nozzles from each other are increased approximately in the middle block height upwards and downwards.
  • FIG. 4 Another exemplary embodiment of the invention is shown in FIG. 4, the blowing nozzles being arranged on individual nozzle boxes in a manner known per se. Three nozzle boxes 12, 13 and 14 are shown in the cutout. Between the nozzle box 12 on the one hand and the nozzle boxes 13 and 14 on the other hand there are gas outflow channels 15 and 16 which open into the gas outflow channel 17 which is connected to the suction side of a fan (not shown).
  • the nozzle rows 10a, 10b, 10c, 10d, 10e, 10f are arranged on the nozzle box 12 with spacing between the nozzles increasing in the direction of the gas outflow channel 17 net.
  • the nozzle openings decrease from the nozzle rows 10c and 10d in the direction of the gas outflow channels 15 and 16.
  • the devices shown in FIGS. 1, 2, 3 and 4 are not only suitable for heating, but also for cooling metallic material. While gas is expediently used as the cooling medium in the case of the device according to FIG. 1, in the case of cooling devices according to FIGS. 2, 3 and 4 both gases and spray mist and liquids can be used as the cooling medium. When using spray mist or liquid as the cooling medium, the rows of nozzles according to FIGS. 3 and 4 are predominantly arranged horizontally.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
EP85111093A 1984-09-12 1985-09-03 Dispositif pour le chauffage ou le refroidissement de produits métalliques Withdrawn EP0174589A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843433433 DE3433433C1 (de) 1984-09-12 1984-09-12 Vorrichtung zum Erwaermen oder Kuehlen von metallischem Gut
DE3433433 1984-09-12

Publications (1)

Publication Number Publication Date
EP0174589A1 true EP0174589A1 (fr) 1986-03-19

Family

ID=6245189

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85111093A Withdrawn EP0174589A1 (fr) 1984-09-12 1985-09-03 Dispositif pour le chauffage ou le refroidissement de produits métalliques

Country Status (3)

Country Link
EP (1) EP0174589A1 (fr)
DE (1) DE3433433C1 (fr)
ES (1) ES296104Y (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0283869A2 (fr) * 1987-03-12 1988-09-28 Alusuisse-Lonza Services Ag Dispositif pour l'exposition à un courant de gaz d'objets comprenant des surfaces plates dans un assemblage ayant des espaces ventilables
WO1995020058A1 (fr) * 1994-01-20 1995-07-27 Ebner-Industrieofenbau Gesellschaft Mbh Dispositif de refroidissement du couvercle de protection de la charge dans des fours a recuire
DE102008020040A1 (de) * 2007-10-22 2009-04-23 Otto Junker Gmbh Ofensystem zur konvektiven thermischen Behandlung von metallischem Gut und Transporteinheit für das Ofensystem

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT401306B (de) * 1995-01-31 1996-08-26 Ebner Peter Dipl Ing Stossofen zur wärmebehandlung von leichtmetallbarren
EP0894150B1 (fr) * 1997-01-30 2002-05-15 LOI Thermprocess GmbH Four a cloche

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1051440A (fr) * 1950-11-27 1954-01-15 Ruhrtaler Gesenkschmiederei F Four à réchauffer, en particulier pour pièces à estamper à chaud
FR1393921A (fr) * 1964-05-15 1965-03-26 Ofenbau Fritz G M B H & Co K G Dispositif pour atténuer les tensions internes dans les treillis métalliques d'armature pour béton armé
US3304071A (en) * 1965-01-05 1967-02-14 Sunbeam Equip Metal billet homogenizing furnace
DE2601658A1 (de) * 1976-01-17 1977-07-28 J F Mahler Fa Kuehlvorrichtung fuer einen durchlaufofen
BE886651R (fr) * 1980-12-12 1981-04-01 Centre Rech Metallurgique Procede et dispositif de refroidissement accelere de bandes minces

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1051440A (fr) * 1950-11-27 1954-01-15 Ruhrtaler Gesenkschmiederei F Four à réchauffer, en particulier pour pièces à estamper à chaud
FR1393921A (fr) * 1964-05-15 1965-03-26 Ofenbau Fritz G M B H & Co K G Dispositif pour atténuer les tensions internes dans les treillis métalliques d'armature pour béton armé
US3304071A (en) * 1965-01-05 1967-02-14 Sunbeam Equip Metal billet homogenizing furnace
DE2601658A1 (de) * 1976-01-17 1977-07-28 J F Mahler Fa Kuehlvorrichtung fuer einen durchlaufofen
BE886651R (fr) * 1980-12-12 1981-04-01 Centre Rech Metallurgique Procede et dispositif de refroidissement accelere de bandes minces

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0283869A2 (fr) * 1987-03-12 1988-09-28 Alusuisse-Lonza Services Ag Dispositif pour l'exposition à un courant de gaz d'objets comprenant des surfaces plates dans un assemblage ayant des espaces ventilables
EP0283869A3 (en) * 1987-03-12 1990-03-14 Carl Prof.Dr.-Ing. Kramer Device to expose to a gas stream objects with flat surfaces in a position which can be traversed
WO1995020058A1 (fr) * 1994-01-20 1995-07-27 Ebner-Industrieofenbau Gesellschaft Mbh Dispositif de refroidissement du couvercle de protection de la charge dans des fours a recuire
DE102008020040A1 (de) * 2007-10-22 2009-04-23 Otto Junker Gmbh Ofensystem zur konvektiven thermischen Behandlung von metallischem Gut und Transporteinheit für das Ofensystem

Also Published As

Publication number Publication date
DE3433433C1 (de) 1985-10-24
ES296104U (es) 1988-06-16
ES296104Y (es) 1989-02-01

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Inventor name: ORTMANNS, THEODOR, DIPL.-ING.