EP0088995A1 - Four à sole tournante - Google Patents

Four à sole tournante Download PDF

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Publication number
EP0088995A1
EP0088995A1 EP83102289A EP83102289A EP0088995A1 EP 0088995 A1 EP0088995 A1 EP 0088995A1 EP 83102289 A EP83102289 A EP 83102289A EP 83102289 A EP83102289 A EP 83102289A EP 0088995 A1 EP0088995 A1 EP 0088995A1
Authority
EP
European Patent Office
Prior art keywords
furnace
rotary hearth
door
hearth furnace
exit door
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.)
Granted
Application number
EP83102289A
Other languages
German (de)
English (en)
Other versions
EP0088995B1 (fr
Inventor
Horst Gillhaus
Wolfgang Faber
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.)
EON Ruhrgas AG
Original Assignee
Brown Boveri und Cie AG Germany
BBC Brown Boveri AG Germany
Ruhrgas 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 Brown Boveri und Cie AG Germany, BBC Brown Boveri AG Germany, Ruhrgas AG filed Critical Brown Boveri und Cie AG Germany
Priority to AT83102289T priority Critical patent/ATE21167T1/de
Publication of EP0088995A1 publication Critical patent/EP0088995A1/fr
Application granted granted Critical
Publication of EP0088995B1 publication Critical patent/EP0088995B1/fr
Expired 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
    • F27B9/14—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
    • F27B9/16—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 circular or arcuate path
    • 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
    • C21D9/0037—Rotary furnaces with vertical axis; Furnaces with rotating floor
    • 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
    • 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
    • F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
    • F27B9/045—Furnaces with controlled atmosphere

Definitions

  • the invention relates to a rotary hearth furnace with a cylindrical or angular furnace space and rotating furnace endodes, which is divided into individual stove segments and with an inlet and outlet door, the width of which corresponds to the width of the stove segments.
  • Such rotary hearth furnaces are known as heat treatment furnaces with cylindrical or angular furnace space and rotating floor.
  • the parts to be treated are placed on the slowly rotating furnace floor and move through the various heating zones.
  • rotary hearth furnaces as heat treatment furnaces is that no transfer elements are required for the transport of the batch within the furnace.
  • the batch rests on the rotating hearth, which is stored outside in the cold and is rotated by an external drive.
  • Ovens with a special inlet door and a special outlet door are generally used.
  • These rotary hearth furnaces are between Inlet and outlet are empty so that the beginning of the furnace is separated from the end of the furnace. This does not give rise to the disadvantages that occur when only one door is used as the inlet and outlet door, since the cold batch introduced is placed next to a finished, warm batch without separation.
  • the rotary hearth furnace is operated in cycles and a batch can only be introduced if a batch has been removed beforehand.
  • the new batch then moves from the infeed step by step through the different batch locations to the picking position.
  • it first passes through the heating zone and then the zone for keeping the desired temperature constant.
  • the rotary hearth furnace therefore has an asymmetrical heating density along the circumference.
  • Double gas curtains are provided at the door openings to prevent air from entering.
  • the inner gas curtain is intended for inert gas operation, the outer gas curtain for gas air mixtures.
  • the gas curtains are automatically switched on via solenoid valves and ignited from the inside of the furnace or from an electrically monitored ignition lamp.
  • Such a rotary hearth furnace has proven itself in its form as a continuous furnace for heat treatment. It has also already been stated to operate the rotary hearth furnace as a batch furnace, which means that it can be fully loaded and after the entire contents of the furnace have been heated it is emptied again. However, this type of use as a batch furnace does not increase the scope of the rotary hearth furnace.
  • the object of the invention is therefore to operate a rotary hearth furnace in such a way and to provide it with additional devices that its field of application is considerably improved.
  • each exit door is optionally connected to a further treatment device (quenching bath, hardening press or the like) with the interposition of a lock.
  • a further treatment device quenching bath, hardening press or the like
  • each exit door e.g. quenching baths with different quenching temperatures, hardening press or the like.
  • the exit door is advantageously connected to the associated further processing device via a lock in order to avoid disturbances in the gas atmosphere.
  • the furnace shown in Figure 1 consists of the heat insulated furnace walls 1, which shield the interior of the furnace from the outside air.
  • an entrance door E and up to three exit doors A1, A2, A3 are provided in this horizontal section.
  • Heating elements 2 are provided in the furnace interior delimited by the insulating walls 1.
  • the grids R1, R2, R3 and R4 are located on a turntable D which rotates about the axis X.
  • the turntable D is fed through the entrance door E with these grates and the batch to be treated, the turntable being rotated by a rotating unit which corresponds to the angle of a grate after each insertion of a grate. If the batch intended for the furnace is present in the furnace, the temperature is increased and the intended heat treatment can be carried out. Depending on the further treatment after the goods have been heated, the grates with the batch leave the oven via exit doors A 1 or A2 or A3.
  • Fig. 2 shows the simplest version of a rotary hearth furnace system with a quenching bath.
  • the furnace 10 is fed through the entrance door E, which is preceded by a lock S1.
  • the grids are provided on tracks 11 and 12.
  • the grids including the batch leave the furnace via the exit door A3 and are fed to the quench bath 13.
  • a lock S4 is provided between the exit door A3 and the bathroom 13.
  • the batch is moved further in the direction 14, while the gratings are optionally fed to the washing machine 15 with a new batch.
  • the grates pass the tempering furnace 16 with a new batch.
  • the grates, including the batch located on the inside reach the entrance door E via the conveyor tracks 12 and 11.
  • Fig. 3 shows another embodiment of the invention with two quenching baths.
  • the furnace 10 is fed again via the lock S1 and the grates can leave the furnace via the exit A2 or A3.
  • the quench bath 17 is downstream of the exit A2 via the lock S3 switches, the quenching bath 13, as shown in FIG. 2, is connected downstream of the output A3 via the lock S4.
  • a salt bath and an oil bath can be used for bath 13.
  • quenching baths of the same type can also be used, which differ in temperature.
  • the arrangement of the washing machine 15 and the tempering furnace 16 corresponds to the embodiment shown in FIG. 2.
  • the exit door A1 is followed by a further bath 18 via a lock S2.
  • the bath 18 can be designed as a water bath. However, it can also be a salt hot bath or an oil hot bath which differs in temperature from baths 13 and 17, respectively.
  • the arrangement of the washing machine 15 and the starting furnace 16 corresponds to the statements in FIGS. 2 and 3.
  • FIG. 5 shows another embodiment, here a manipulator or robot 20 is connected downstream of the exit door A2.
  • This robot takes the heated objects and places them in a further processing device, e.g. a hardness press 21.
  • a further processing device e.g. a hardness press 21.
  • the exit door A3 is followed by a quench bath 13 via a lock.
  • the arrangement of the washing machine 15 and the starting furnace 16 also corresponds to the previous figures.
  • the invention shown in Figures 1 to 5 enables a universally applicable rotary hearth furnace.
  • the flexibility of an oven system can be increased considerably.
  • batches of various qualities can be subjected to various heat treatments at short intervals.
  • the advantage of the rotary hearth furnace system is in the see lower investment costs.
  • a chamber furnace system with the same flexibility would require three furnaces.
  • it must be taken into account that such a rotary hearth batch furnace has the lowest energy consumption, since it can be used better and has little downtime like a chamber furnace system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Tunnel Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
EP83102289A 1982-03-13 1983-03-09 Four à sole tournante Expired EP0088995B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83102289T ATE21167T1 (de) 1982-03-13 1983-03-09 Drehherdofen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823209245 DE3209245A1 (de) 1982-03-13 1982-03-13 Drehherdofen
DE3209245 1982-03-13

Publications (2)

Publication Number Publication Date
EP0088995A1 true EP0088995A1 (fr) 1983-09-21
EP0088995B1 EP0088995B1 (fr) 1986-07-30

Family

ID=6158206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83102289A Expired EP0088995B1 (fr) 1982-03-13 1983-03-09 Four à sole tournante

Country Status (3)

Country Link
EP (1) EP0088995B1 (fr)
AT (1) ATE21167T1 (fr)
DE (1) DE3209245A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0359756A1 (fr) * 1987-04-03 1990-03-28 Caterpillar Inc. Systeme de four a chambres multiples, a foyer rotatif a usages multiples
EP0735149A1 (fr) * 1995-03-31 1996-10-02 Ipsen Industries International Gesellschaft Mit Beschränkter Haftung Dispositif pour le traitement thermique d'articles métalliques sous vide
WO2003081156A1 (fr) * 2002-03-27 2003-10-02 Loi Thermprocess Gmbh Installation pour le traitement thermique de pieces a usiner
CN1133060C (zh) * 1995-04-24 2003-12-31 洛伊热处理有限公司 工件热处理方法及设备
WO2005050112A3 (fr) * 2003-11-19 2005-08-04 Loi Thermprocess Gmbh Installation et procede permettant de traiter thermiquement des pieces a usiner
EP2717008A3 (fr) * 2012-10-08 2017-08-23 Ipsen International GmbH Four industriel étanche au gaz de protection, notamment four à chambre, four poussant, four à sole tournante ou four à sole annulaire

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3435376C2 (de) * 1984-09-27 1996-09-12 Loi Ipsen Holding Gmbh Verfahren zur Wärmebehandlung von Werkstücken
DE4316841A1 (de) * 1993-05-19 1994-11-24 Aichelin Gmbh Vorrichtung zur Wärmebehandlung metallischer Werkstücke

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1013380A (fr) * 1950-03-01 1952-07-28 Four circulaire rotatif pour le réchauffement du métal en lingots, billettes, etc.
FR1483242A (fr) * 1966-06-13 1967-06-02 Toyo Kogyo Company Ltd Four pour traitement thermique
FR1560499A (fr) * 1967-02-15 1969-03-21

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1013380A (fr) * 1950-03-01 1952-07-28 Four circulaire rotatif pour le réchauffement du métal en lingots, billettes, etc.
FR1483242A (fr) * 1966-06-13 1967-06-02 Toyo Kogyo Company Ltd Four pour traitement thermique
FR1560499A (fr) * 1967-02-15 1969-03-21

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0359756A1 (fr) * 1987-04-03 1990-03-28 Caterpillar Inc. Systeme de four a chambres multiples, a foyer rotatif a usages multiples
EP0359756A4 (en) * 1987-04-03 1991-01-30 Holcroft/Loftus, Incorporated Rotary hearth multi-chamber multi-purpose furnace system
EP0735149A1 (fr) * 1995-03-31 1996-10-02 Ipsen Industries International Gesellschaft Mit Beschränkter Haftung Dispositif pour le traitement thermique d'articles métalliques sous vide
US5722825A (en) * 1995-03-31 1998-03-03 Ipsen Industries International Gmbh Device for heat-treating metallic work pieces in a vacuum
CN1133060C (zh) * 1995-04-24 2003-12-31 洛伊热处理有限公司 工件热处理方法及设备
WO2003081156A1 (fr) * 2002-03-27 2003-10-02 Loi Thermprocess Gmbh Installation pour le traitement thermique de pieces a usiner
WO2005050112A3 (fr) * 2003-11-19 2005-08-04 Loi Thermprocess Gmbh Installation et procede permettant de traiter thermiquement des pieces a usiner
EP2717008A3 (fr) * 2012-10-08 2017-08-23 Ipsen International GmbH Four industriel étanche au gaz de protection, notamment four à chambre, four poussant, four à sole tournante ou four à sole annulaire

Also Published As

Publication number Publication date
DE3209245A1 (de) 1983-09-15
ATE21167T1 (de) 1986-08-15
EP0088995B1 (fr) 1986-07-30
DE3209245C2 (fr) 1988-01-28

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