EP0088995B1 - Drehherdofen - Google Patents

Drehherdofen Download PDF

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Publication number
EP0088995B1
EP0088995B1 EP83102289A EP83102289A EP0088995B1 EP 0088995 B1 EP0088995 B1 EP 0088995B1 EP 83102289 A EP83102289 A EP 83102289A EP 83102289 A EP83102289 A EP 83102289A EP 0088995 B1 EP0088995 B1 EP 0088995B1
Authority
EP
European Patent Office
Prior art keywords
furnace
rotary hearth
door
exit door
exit
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.)
Expired
Application number
EP83102289A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0088995A1 (de
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
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 Ruhrgas AG filed Critical Ruhrgas AG
Priority to AT83102289T priority Critical patent/ATE21167T1/de
Publication of EP0088995A1 publication Critical patent/EP0088995A1/de
Application granted granted Critical
Publication of EP0088995B1 publication Critical patent/EP0088995B1/de
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 a rotating furnace floor which is divided into individual cooker segments and with an inlet and outlet door, the width of which corresponds to the width of the cooker 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.
  • 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 curtain devices 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 and to provide it with additional devices in such a way that its field of application is considerably improved.
  • each exit door is connected to a further processing device (quenching bath, hardening press or the like), possibly with the interposition of a lock.
  • each exit door e.g. quench baths with different quenching temperatures, hardness 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 these insulating walls 1. All three possible exit doors are shown 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 A1 or A2 or ⁇ A3.
  • Fig. 2 shows an embodiment of a rotary hearth furnace system with two quenching baths.
  • 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 and can leave the furnace including the batch via the exit door A2 or A3.
  • Quench bath 17 is connected downstream of output A2 via lock S3, and quench bath 13 is connected downstream of output A3 via lock S4.
  • a warm salt bad and an oil bath can be used for the bath 13.
  • quenching baths of the same type can also be used, which differ in temperature.
  • the emptied grates may be fed to the washing machine 15 with a new batch. Finally, the grates pass the tempering furnace 16 with a new batch.
  • the exit door A1 is followed by a further bathroom 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 FIG. 2.
  • the exit door A2 is followed by a manipulator or robot 20.
  • This robot removes the heated objects and places them in a further processing device, e.g. B. 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 4 enables a universally applicable rotary hearth furnace.
  • the flexibility of an oven system can be increased considerably.
  • batches of different quality can be subjected to different heat treatments at short intervals.
  • the advantage of the rotary hearth furnace system can be seen in the 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 Drehherdofen Expired EP0088995B1 (de)

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 EP0088995A1 (de) 1983-09-21
EP0088995B1 true EP0088995B1 (de) 1986-07-30

Family

ID=6158206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83102289A Expired EP0088995B1 (de) 1982-03-13 1983-03-09 Drehherdofen

Country Status (3)

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

Families Citing this family (8)

* 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
US4763880A (en) * 1987-04-03 1988-08-16 Holcroft/Loftus Inc. Rotary hearth multi-chamber, multi-purpose furnace system
DE4316841A1 (de) * 1993-05-19 1994-11-24 Aichelin Gmbh Vorrichtung zur Wärmebehandlung metallischer Werkstücke
DE29505496U1 (de) * 1995-03-31 1995-06-01 Ipsen Industries International GmbH, 47533 Kleve Vorrichtung zur Wärmebehandlung metallischer Werkstücke unter Vakuum
DE19514289B4 (de) * 1995-04-24 2006-09-21 Loi Thermprocess Gmbh Ofenanlage zum Wärmebehandeln von Werkstücken
DE10310739A1 (de) * 2002-03-27 2003-10-09 Loi Thermprocess Gmbh Anlage zum Wärmebehandeln von Werkstücken
WO2005050112A2 (de) * 2003-11-19 2005-06-02 Loi Thermprocess Gmbh Anlage und verfahren zum wärmebehandeln von werkstücken
DE102012019653A1 (de) * 2012-10-08 2014-04-10 Ipsen International Gmbh Gasdichter schutzgasbegaster Industrieofen, insbesondere Kammerofen, Durchstoßofen, Drehherdofen oder Ringherdofen

Family Cites Families (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 (da) * 1967-02-15 1969-03-21

Also Published As

Publication number Publication date
EP0088995A1 (de) 1983-09-21
DE3209245A1 (de) 1983-09-15
DE3209245C2 (da) 1988-01-28
ATE21167T1 (de) 1986-08-15

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