EP2085728B1 - Four rotatif - Google Patents

Four rotatif Download PDF

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Publication number
EP2085728B1
EP2085728B1 EP09000693A EP09000693A EP2085728B1 EP 2085728 B1 EP2085728 B1 EP 2085728B1 EP 09000693 A EP09000693 A EP 09000693A EP 09000693 A EP09000693 A EP 09000693A EP 2085728 B1 EP2085728 B1 EP 2085728B1
Authority
EP
European Patent Office
Prior art keywords
heating chamber
objects
rotary kiln
cover
kiln according
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.)
Active
Application number
EP09000693A
Other languages
German (de)
English (en)
Other versions
EP2085728A1 (fr
Inventor
Erland LUNDSTRÖM
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.)
Schuler SMG GmbH and Co KG
Original Assignee
Schuler SMG GmbH and Co KG
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 Schuler SMG GmbH and Co KG filed Critical Schuler SMG GmbH and Co KG
Publication of EP2085728A1 publication Critical patent/EP2085728A1/fr
Application granted granted Critical
Publication of EP2085728B1 publication Critical patent/EP2085728B1/fr
Active 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
    • F27B9/30—Details, accessories, or equipment peculiar to 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 peculiar to furnaces of these types
    • F27B9/39—Arrangements of devices for discharging

Definitions

  • the invention relates to a rotary kiln with a heating chamber, in which a feed opening is formed, can be introduced by the objects to be heated in the heating chamber, and with a rotationally driven, circulating transport device, by means of which the objects are transported through the heating chamber to a removal opening to the objects are removable from the heating chamber, wherein the heating chamber has one or more side walls, a floor and a ceiling.
  • Such a rotary kiln which is also referred to as rotary hearth furnace, serves to heat various objects, such as metal circuit boards, in a continuous process to a predetermined temperature of, for example, about 900 ° C to 1100 ° C.
  • the rotary kiln has a heating chamber, which is heated in the usual way by direct or indirect heating to a predetermined temperature and kept at the temperature by means of a conventional control.
  • a circulating transport device is arranged, for example in the form of an endless conveyor, on which the objects can be placed.
  • a lateral feed opening is provided, through which the objects are introduced into the interior of the heating chamber and deposited on the transport device.
  • the transport device guides the objects through the heating chamber, wherein after removal of approximately 310 ° to 340 ° of the circumference of the heating chamber or the transport path of the transport device in the side wall, a removal opening is formed through which the objects are removed from the transport device and out of the Heating chamber can be removed. Subsequently, the objects are sent for further processing in other stations or machines.
  • the rotary kiln has a heating chamber in which a lateral charging opening is formed, through which the glass plates can be introduced into the heating chamber.
  • a rotary driven, circulating transport device By means of a rotary driven, circulating transport device, the glass plates are transported through the heating chamber to a side removal opening, where they are removed from the heating chamber.
  • the heating chamber has a cylindrical housing and has a plurality of side walls, a floor and a ceiling.
  • the invention has for its object to provide a rotary kiln of the type mentioned, which has a compact structure and are avoided in the excessive heat loss and, where appropriate, protective gas losses.
  • a rotary kiln with the features of claim 1. It is provided that at least a portion of the ceiling is designed as a rotary-driven lid, which carries on its underside facing the heating chamber a plurality of holders for receiving the objects, and that the feed opening and the removal opening are formed in the bottom of the heating chamber. Preferably, both the charging opening and the removal opening are provided in the bottom of the heating chamber.
  • the invention is based on the basic idea of loading and emptying the heating chamber from its underside, as a result of which excessive heat loss can already be minimized due to the geometrical arrangement of the charging opening and the removal opening.
  • the transport device is integrated into the ceiling of the heating chamber by at least a portion of the ceiling is formed as a rotating lid on which the holders are attached to the objects.
  • the objects are preferably introduced by means of a first Gelenkarmroboters from below through the feed opening in the heating chamber and placed on the lid formed on the holder. In their seated on the holders position the objects run through the heating chamber due to the rotation of the lid over a circumferential range of about 310 ° to 340 ° until they reach the removal opening.
  • the aforementioned articulated-arm robot or another second articulated-arm robot engages the discharge opening from below through the bottom of the heating chamber and takes the objects from the holders and out of the heating chamber through the removal opening.
  • the heat loss and optionally also the protective gas loss is relatively low, so that the operating costs of the rotary kiln are substantially reduced.
  • the feed opening and / or the removal opening are formed in the bottom of the heating chamber as slots, wherein the slots are preferably perpendicular to the direction of movement of the objects in the heating chamber. Due to this relatively small size of the feed opening and the removal opening, the heat loss and possibly also the protective gas loss can continue to be kept low.
  • the rotary kiln according to the invention has a supporting central support, which is surrounded by the annular heating chamber. After the objects are introduced through the feed opening in the heating chamber, they pass through the annular heating chamber to the center support over a circumferential angle of 310 ° to 340 ° until they reach the removal opening.
  • the charging opening and the removal opening are thus arranged offset in the circumferential direction of the heating chamber by an angle of 20 ° to 50 °.
  • annular recess is formed, in which the lid, which is also annular and in particular designed as an annular disc, is rotatably inserted.
  • the lid which is also annular and in particular designed as an annular disc, is rotatably inserted.
  • FIG. 1 shows a rotary kiln 10, which has a central support 11, which carries at its upper end a transversely to the longitudinal extent of the central support 11 cantilevered ceiling plate 12.
  • the central support 11 is concentrically surrounded by an annular heating chamber 19 which has a rectangular cross-section in the illustrated embodiment and a radially outer outer wall 16 and a radially inner inner wall 17 and is closed on its underside by a bottom 18.
  • the ceiling plate 12 forms a ceiling 23 of the heating chamber 19th
  • annular cover 14 In the ceiling 23 of the heating chamber 19 and thus in the ceiling plate 12, a concentric with the central support 11 formed, annular recess 13 is provided, in which an annular cover 14 is rotatably inserted under close fit.
  • the annular cover 14 is rotationally driven in a manner not shown and has on its underside 14a, which projects into the interior of the heating chamber 19, shown only schematically holder 15, on which in each case at least one object P can be attached.
  • the rotationally driven cover 14 together with the holders 15 a transport device 22, with which the objects P can be transported through the heating chamber 19 and thus through the rotary kiln.
  • the heating chamber 19 is supported on its underside via supports 24 on the ground, so that below the heating chamber 19, a free space 25 is formed.
  • This space 25 is used in the rotary kiln 10 according to the invention to bring the objects P in the heating chamber 19 and to remove from this.
  • two slots 20 and 21 each extending radially to the central support 11 are provided which are offset by an angle of approximately 30 ° to 40 ° in the circumferential direction and thus offset in the transport direction of the heating chamber 19 it out Fig. 2 is apparent.
  • the slot 20 forms a feed opening, at which the objects can be introduced from the underside of the heating chamber 19, for example by means of a schematically shown Gelenkarmroboters R in the heating chamber 19 and placed on the holder 15 or suspended.
  • the objects pass through the heating chamber 19 as a result of the rotation of the lid 14 until they reach the removal opening 21, at which another, not shown Gelenkarmroboter is provided by means of which the objects removed from the holders and through the removal opening 21 formed in the bottom 18 of the heating chamber 19 can be removed. Subsequently, the objects can be supplied in a conventional manner for further processing.
  • the interior of the heating chamber 19 is heated in a conventional manner and maintained at a desired, predetermined temperature, which is not shown in detail in the figures.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Tunnel Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (9)

  1. Four rotatif équipé d'une chambre de chauffe (19) dans laquelle une ouverture d'enfournement (20) est réalisée, à travers laquelle les objets (P) à réchauffer peuvent être amenés dans la chambre de chauffe (19) et avec un dispositif de transport (22) entraîné en rotation, circulant en continu, à l'aide duquel les objets (P) peuvent être transportés à travers la chambre de chauffe (19) jusqu'à une ouverture de retrait (21) au niveau de laquelle les objets (P) peuvent être retirés de la chambre de chauffe (19), la chambre de chauffe (19) comportant une ou plusieurs parois latérales (16, 17), un plancher (18) et un plafond (23), caractérisé en ce qu'au moins une section du plafond (23) prend la forme d'un couvercle (14) entraîné en rotation qui porte sur son côté inférieur orienté vers la chambre de chauffe (19) plusieurs supports (15) pour loger des objets (P) et que l'ouverture d'enfournement (20) et l'ouverture de retrait (21) sont réalisées dans le plancher (18) de la chambre de chauffe (19).
  2. Four rotatif selon la revendication 1, caractérisé en ce que l'ouverture d'enfournement (20) et/ou l'ouverture de retrait (21) prennent la forme de fentes.
  3. Four rotatif selon la revendication 2, caractérisé en ce que les fentes s'étendent perpendiculairement à la direction de déplacement des objets (P) dans la chambre de chauffe (19).
  4. Four rotatif selon l'une quelconque des revendications 1 à 3, caractérisé par un montant central (11) porteur entouré par la chambre de chauffe (19) de forme annulaire.
  5. Four rotatif selon la revendication 4, caractérisé en ce que l'ouverture d'enfournement (20) et l'ouverture de retrait (21) sont disposées de façon décalée dans la direction périphérique de la chambre de chauffe (19) selon un angle de 20° à 50°.
  6. Four rotatif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le couvercle (14) prend une forme annulaire et est inséré de façon à pouvoir être tourné dans un évidement (13) annulaire du plafond (23) de la chambre de chauffe (19).
  7. Four rotatif selon l'une quelconque des revendications 4 à 6, caractérisé en ce qu'un entraînement rotatif prévu pour le couvercle (14) est disposé dans le montant central (11).
  8. Four rotatif selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'un robot à bras articulé (R) est prévu à l'aide duquel les objets (P) sont insérés dans le support (15) et retirés hors de lui.
  9. Four rotatif selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la chambre de chauffe (19) est placée sur des montants (24) et qu'une espace libre (25) est formé sous le plancher (18) de la chambre de chauffe (19).
EP09000693A 2008-01-30 2009-01-20 Four rotatif Active EP2085728B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008006682A DE102008006682A1 (de) 2008-01-30 2008-01-30 Drehofen

Publications (2)

Publication Number Publication Date
EP2085728A1 EP2085728A1 (fr) 2009-08-05
EP2085728B1 true EP2085728B1 (fr) 2011-12-07

Family

ID=40550224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09000693A Active EP2085728B1 (fr) 2008-01-30 2009-01-20 Four rotatif

Country Status (4)

Country Link
EP (1) EP2085728B1 (fr)
AT (1) ATE536523T1 (fr)
DE (1) DE102008006682A1 (fr)
ES (1) ES2378923T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014004398A1 (de) 2014-03-18 2015-09-24 Schuler Pressen Gmbh Drehofen

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014063807A1 (fr) 2012-10-23 2014-05-01 Tata Steel Uk Limited Agencement et procédé pour le chauffage et le travail d'un matériau en feuille

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1919650A (en) * 1931-04-21 1933-07-25 George J Hagan Rotary furnace
CH200174A (de) * 1936-12-29 1938-09-30 Bbc Brown Boveri & Cie Ringkanalofen.
AT209788B (de) * 1957-11-19 1960-06-25 Dolomitwerke Ges Mit Beschraen Ringofen mit von unten beschickbarer und nach unten entleerbarer Ofenkammer
JPS53127312A (en) * 1976-06-17 1978-11-07 Daido Steel Co Ltd Continuous atomosphere furnace and method of supplying atomosphere gas therein
DE3248234C2 (de) * 1982-12-28 1986-06-12 Keramikindustrieanlagen W.Strohmenger GmbH & Co KG, 8524 Neunkirchen Tunnelofen
RU2020397C1 (ru) * 1991-06-24 1994-09-30 Зубкова Инна Евгеньевна Кольцевая печь
JP4008713B2 (ja) 2002-01-22 2007-11-14 昭和鉄工株式会社 ガラス基板用熱処理装置
US6901990B2 (en) * 2002-07-18 2005-06-07 Consolidated Engineering Company, Inc. Method and system for processing castings
EP1685355B1 (fr) * 2003-11-19 2011-04-06 LOI Thermprocess GmbH Installation pour le traitement thermique de pieces diverses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014004398A1 (de) 2014-03-18 2015-09-24 Schuler Pressen Gmbh Drehofen

Also Published As

Publication number Publication date
EP2085728A1 (fr) 2009-08-05
DE102008006682A1 (de) 2009-08-13
ES2378923T3 (es) 2012-04-19
ATE536523T1 (de) 2011-12-15

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