DE1131132B - Tunnel furnace in gas-tight design for firing electro-ceramic materials in a protective gas atmosphere - Google Patents

Tunnel furnace in gas-tight design for firing electro-ceramic materials in a protective gas atmosphere

Info

Publication number
DE1131132B
DE1131132B DER29197A DER0029197A DE1131132B DE 1131132 B DE1131132 B DE 1131132B DE R29197 A DER29197 A DE R29197A DE R0029197 A DER0029197 A DE R0029197A DE 1131132 B DE1131132 B DE 1131132B
Authority
DE
Germany
Prior art keywords
gas
furnace
tunnel
tunnel furnace
tight
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.)
Pending
Application number
DER29197A
Other languages
German (de)
Inventor
Dipl-Ing Dr-Ing Rud Buchkremer
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.)
Ludwig Riedhammer GmbH and Co KG
Original Assignee
Ludwig Riedhammer 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 Ludwig Riedhammer GmbH and Co KG filed Critical Ludwig Riedhammer GmbH and Co KG
Priority to DER29197A priority Critical patent/DE1131132B/en
Publication of DE1131132B publication Critical patent/DE1131132B/en
Pending legal-status Critical Current

Links

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
    • F27B9/04—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
    • 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 tunnel furnace
    • F27B9/26—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 tunnel furnace on or in trucks, sleds, or containers
    • F27B9/262—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 tunnel furnace on or in trucks, sleds, or containers on or in trucks
    • 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
    • F27B9/32—Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/18—Door frames; Doors, lids, removable covers
    • F27D1/1858—Doors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D2021/0057—Security or safety devices, e.g. for protection against heat, noise, pollution or too much duress; Ergonomic aspects
    • F27D2021/0092—Security or safety devices, e.g. for protection against heat, noise, pollution or too much duress; Ergonomic aspects against a jam in the transport line or a production interruption

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)

Description

Tunnelofen in gasdichter Ausführung zum Brennen von elektrokeramischen Massen unter Schutzgas-Atmosphäre Die Erfindung betrifft einen Tunnelofen mit Wagenförderung, wobei das Gut auf der Wagenplattform oder in einen geringen Abstand davon aufgebaut und durch den Ofentunnel in verschiedenen Temperaturzonen nach einem bestimmten Temperaturprogramm aufgeheizt, gesintert und abgekühlt wird. Beim Brennen von elektrokeramischen Massen, wie z. B. Mangan-Zink-Ferriten, ist es erforderlich, diesen Brennvorgang in einer oder mehreren unterschiedlichen, genau definierten Gasatmosphären durchzuführen. Dies ermöglicht der Tunnelofen mit der Einrichtung im Sinn der Erfindung.Tunnel furnace in gas-tight design for firing electro-ceramic Masses under a protective gas atmosphere The invention relates to a tunnel furnace with carriage conveyance, the goods being built on the wagon platform or at a short distance therefrom and through the furnace tunnel in different temperature zones according to a certain one Temperature program is heated, sintered and cooled. When firing electroceramic Masses such as B. Manganese-zinc-ferrites, it is necessary this burning process to be carried out in one or more different, precisely defined gas atmospheres. This is made possible by the tunnel furnace with the device in accordance with the invention.

In den bisherigen kontinuierlichen Plattendurchstoßöfen zum Brennen von elektrokeramischen Massen werden die zu sinternden Teile auf Schubplatten aufgelegt und meist in eine oder maximal zwei Etagen in oxydierender oder neutraler Ofenatmosphäre nach einer vorgesehenen Temperaturkurve durch den Ofentunnel gestoßen. Die auf den Schubplatten aufgebauten kleinen Gutstapel ermöglichen eine äußerst genaue und gleichmäßige Temperaturbehandlung für alle Teile der Beschickung. Der Nachteil dieser Ofenkonstruktion besteht darin, daß bei besonders großen Kernen und Ringen oder bei sehr empfindlichen Teilen, bei denen eine wesentlich längere Ofenzeit für den Durchlauf des Gutes durch die Ofenbahn notwendig wird, die Leistung entsprechend absinkt.In the previous continuous plate piercing furnaces for firing The parts to be sintered from electroceramic masses are placed on push plates and usually in one or a maximum of two floors in an oxidizing or neutral furnace atmosphere pushed through the furnace tunnel according to a specified temperature curve. The on the Small stacks of goods built up on pusher plates enable extremely precise and uniform material Temperature treatment for all parts of the load. The disadvantage of this furnace design consists in the fact that with particularly large cores and rings or with very sensitive ones Parts that require a much longer oven time for the goods to pass through the oven track becomes necessary, the output decreases accordingly.

Ein Tunnelofen mit Wagenförderung im Sinn der Erfindung erreicht auch bei extrem langen Ofenzeiten eine gute Leistung in Kilogramm Gut je Stunde, da die einzelnen Chargen auf der Wagenplattform in mehreren Etagen übereinander aufgebaut werden können. Wegen der langen Ofendurchlaufzeiten und der dadurch entstehenden längeren Verweildauer des Gutes in den Ofenreaktionszonen muß beim Tunnelofen der Atmosphärenüberwachung eine besondere Bedeutung beigemessen werden. Ein Tunnelofen mit Wagenförderung in der bisher bekannten Bauart ermöglicht nicht den Betrieb mit reinen neutralen Schutzgasen oder zumindest ist der Verbrauch an Schutzgas so hoch, daß die dadurch entstehenden Betriebskosten ein Vielfaches der übrigen Energie- und Wartungskosten betragen. In der nachstehenden Beschreibung und der Zeichnung sind die wesentlichen Merkmale der Erfindung für die Einstellung einer genauen definierten Ofenatmosphäre im Ofentunnel bei sparsamstem Verbrauch an Schutzgasen dargestellt.A tunnel furnace with carriage conveyance in the sense of the invention also achieves with extremely long furnace times, a good output in kilograms of goods per hour, since the individual batches built on top of each other on the trolley platform on several floors can be. Because of the long furnace cycle times and the resulting longer residence time of the goods in the furnace reaction zones must be in the tunnel furnace Particular importance should be attached to atmospheric monitoring. A tunnel oven with carriage conveyance in the previously known type does not allow operation with pure neutral protective gases or at least the consumption of protective gas is so high, that the resulting operating costs are a multiple of the remaining energy and maintenance costs. In the description and drawing below are the essential features of the invention for setting a well-defined The furnace atmosphere in the furnace tunnel is shown with the most economical use of protective gases.

Fig. 1 zeigt einen Längsschnitt des Tunnelofens; Fig. 2 zeigt einen Längsschnitt durch die Wagenreihe; Fig. 3 stellt einen Querschnitt des Ofens dar. Am Ofeneinlauf befindet sich die Beschickschleuse 1. Das Ofenende bildet die Entnahmeschleuse 3. Durch diese Schleusen wird der Ofenkanal beim Einlauf eines neuen Wagens bzw. beim Auslauf eines Wagens gegen das Eindringen von Luft in die Ofenatmosphäre abgeschirmt. Die Stoßmaschine 5 an der Ofenbeschickseite bewegt die Tunnelofenwagen gleichmäßig kontinuierlich durch den Ofentunnel 2. Unter dem Ofen befindet sich im Fundament der Begehkanal 4. Um zu vermeiden, daß das Schutzgas im Ofentunnel 2 über die seitlichen Labyrinthspalten und Dichtungstassen in die Atmosphäre des Begehkanals 4 strömt oder umgekehrt, ist unterhalb der Wagenradsätze eine gasdichte Trennwand 6 angeordnet. Diese Trennwand 6 ist mit ebenfalls gasdichten, abgeschlossenen Durchbrüchen versehen, welche im Störungsfall geöffnet werden können. Dadurch wird der Raum unterhalb der Wagen 14 bzw. zwischen den Wagen 17 sowie nach dem Auseinanderziehen der Wagenreihe der Ofenraum 2 direkt zugänglich. Oberhalb der seitlichen Sandtassen befindet sich der Meßstutzen 11, im unteren Wagenraum 4, 17 der Meßstutzen 12. Durch die Einleitung des Schutzgases in den Ofenraum 2 entsteht dort ein Gasüberdruck p (mm WS), der nach Abzug der Druckverluste im seitlichen Wagenlabyrinth als Druck p 1 (mm WS) an der Druckmeßstelle 11 gemessen wird. Der Druck p 2 im Radsatzraum 14, 17 wird an der Druckmeßstelle 12 gemessen. Da die Gasströmung bzw. die Gasverluste im wesentlichen vom Druckunterschied p 1-p 2 abhängen, wird mittels eines Gasleitungssystems 9 in den unteren Wagenraum 14 so viel Gas zugeführt, bis p 1 gleich p 2 ist. Das in den Raum 14 zugeführte Gas kann dabei aus normaler Luft oder aus neutralem Gas, ähnlich der Zusammensetzung des Schutzgases im Ofenraum 2, bestehen. Zur Vermeidung von Gasverlusten sowie unter Berücksichtigung der Notwendigkeit, daß in den Ofenraum 2 und damit eventuell auch in den Radsatzraum 14 abschnittsweise verschiedene Gase z. B. im Aufheizteil des Ofens sowie der Sinterzone oxydierende, in der Abkühlstrecke dagegen rein neutrale eingeleitet werden müssen, ist jeder Radsatzraum 14 allseitig abgedichtet. Dies erfolgt beispielsweise seitlich durch Sandtassen und am Boden mit elastischen Dichtungsschürzen 7, die an Blechschildern 15 befestigt sind. Zwischen den Plattformen benachbarter Wagen sind Asbestdichtungen 16 zur Abdichtung der Wagen gegeneinander vorgesehen. Dadurch wird die Möglichkeit geschaffen, in jedem Radsatzraum 14 den notwendigen Gegendruck zum Ofendruck p sowie eine unterschiedliche Atmosphäre einzuregulieren, was eine Voraussetzung zum Brennen von speziellen elektrokeramischen Massen im Tunnelofen mit Wagenförderung ist.Fig. 1 shows a longitudinal section of the tunnel furnace; Fig. 2 shows one Longitudinal section through the row of wagons; Fig. 3 shows a cross section of the furnace. Loading sluice 1 is located at the furnace inlet. The end of the furnace forms the removal sluice 3. The furnace channel is opened through these sluices when a new wagon or shielded against the ingress of air into the furnace atmosphere at the exit of a car. The slotting machine 5 on the furnace loading side moves the tunnel kiln car evenly continuously through the furnace tunnel 2. Under the furnace is in the foundation the access channel 4. To avoid that the protective gas in the furnace tunnel 2 over the side Labyrinth gaps and sealing cups flows into the atmosphere of the access channel 4 or vice versa, a gas-tight partition 6 is arranged below the wagon wheel sets. This partition 6 is also provided with gas-tight, closed openings, which can be opened in the event of a fault. This creates the space below the Carriages 14 or between the carriages 17 and after the row of cars has been pulled apart the furnace chamber 2 is directly accessible. Above the side sand cups is the measuring nozzle 11, in the lower car space 4, 17 the measuring nozzle 12. Through the introduction of the protective gas in the furnace chamber 2 there is a gas overpressure p (mm WS), the after deducting the pressure losses in the side carriage labyrinth as pressure p 1 (mm WS) is measured at the pressure measuring point 11. The pressure p 2 in the wheelset space 14, 17 is measured at the pressure measuring point 12. Since the gas flow or the gas losses are essentially depend on the pressure difference p 1-p 2, by means of a gas line system 9 in the lower Car space 14 supplied as much gas until p 1 equals p is 2. The gas fed into the space 14 can come from normal air or from neutral gas, similar to the composition of the protective gas in the furnace chamber 2 exist. To avoid gas losses and taking into account the need to that in the furnace space 2 and thus possibly also in the wheelset space 14 in sections different gases e.g. B. in the heating part of the furnace and the sintering zone oxidizing, in the cooling section, on the other hand, purely neutral ones must be introduced, is everyone Wheelset compartment 14 sealed on all sides. This is done through the side, for example Sand cups and on the floor with elastic sealing aprons 7, which are attached to metal signs 15 are attached. There are asbestos seals between the platforms of neighboring cars 16 provided for sealing the car against each other. This creates the possibility created, in each wheelset space 14, the necessary back pressure to the furnace pressure p as well regulate a different atmosphere, which is a prerequisite for burning of special electro-ceramic masses in the tunnel kiln with carriage conveyance.

Claims (4)

PATENTANSPRÜCHE: 1. Tunnelofen mit Wagenförderung in gasdichter Ausführung zum Brennen von vorzugsweise elektrokeramischen Massen in einem oder mehreren verschiedenen Schutzgasen, dadurch gekennzeichnet, daß zwischen dem Radsatzraum der Wagen (14, 17) und dem Begehkanal (4) eine feststehende gasdichte Trennwand (6) angeordnet ist. PATENT CLAIMS: 1. Tunnel furnace with carriage conveyor in a gas-tight design for firing preferably electroceramic compounds in one or more different protective gases, characterized in that a fixed gas-tight partition (6) between the wheel set space of the carriages (14, 17) and the access channel (4) is arranged. 2. Tunnelofen mit Wagenförderung nach Anspruch 1, dadurch gekennzeichnet, daß sich in der Trennwand (6) gasdicht verschließbare Öffnungen befinden, durch welche im Störungsfall die darüberliegenden Ofenräume (14, 17 und 2) zugänglich werden. 2. Tunnel furnace with carriage conveyor according to claim 1, characterized in that that there are gas-tight closable openings in the partition (6) through which, in the event of a malfunction, can access the furnace chambers (14, 17 and 2) above will. 3. Tunnelofen mit Wagenförderung nach Anspruch 1, dadurch gekennzeichnet, daß jeder Wagen allseitig bis zur gasdichten Trennwand (6) abgedichtet ist, vorzugsweise seitlich und am Boden mit elastischen Dichtungsschürzen (7) und an den Stirnseiten mittels eines Blechschildes (15) mit Asbestdichtung (16). 3. tunnel furnace with carriage conveyor according to claim 1, characterized in that that each carriage is sealed on all sides up to the gas-tight partition (6), preferably on the side and on the bottom with elastic sealing aprons (7) and on the front sides by means of a metal plate (15) with an asbestos seal (16). 4. Tunnelofen mit Wagenförderung nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß der Wagenunterraum (14) mittels eines Gasleitungssystems (9) vorzugsweise mit normaler Luft, wahlweise jedoch auch mit neutralem Gas oder mit beiden Gasarten, gleichzeitig entsprechend der Atmosphärenunterteilung im Brenntunnel (2) so unter Druck gesetzt wird, daß der über dem jeweiligen Wagen im Ofenraum (2) gemessene Gasdruck (p) bzw. der Gasdruck (p 1) zwischen Labyrinth, Spalt und Dichtungstasse an der Ofenseite gleich dem im Wagenunterraum (14) erzeugten Gasdruck (p 2) ist.4. Tunnel furnace with carriage conveyance according to claim 1 to 3, characterized in that the lower car space (14) by means of a gas line system (9), preferably with normal air, but optionally also with neutral gas or with both types of gas, at the same time according to the atmospheric subdivision in the burning tunnel (2) is pressurized so that the above the respective car Gas pressure (p) measured in the furnace chamber (2) or the gas pressure (p 1) between the labyrinth, The gap and sealing cup on the furnace side are the same as those created in the lower space of the car (14) Gas pressure (p 2).
DER29197A 1960-12-01 1960-12-01 Tunnel furnace in gas-tight design for firing electro-ceramic materials in a protective gas atmosphere Pending DE1131132B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER29197A DE1131132B (en) 1960-12-01 1960-12-01 Tunnel furnace in gas-tight design for firing electro-ceramic materials in a protective gas atmosphere

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER29197A DE1131132B (en) 1960-12-01 1960-12-01 Tunnel furnace in gas-tight design for firing electro-ceramic materials in a protective gas atmosphere

Publications (1)

Publication Number Publication Date
DE1131132B true DE1131132B (en) 1962-06-07

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Application Number Title Priority Date Filing Date
DER29197A Pending DE1131132B (en) 1960-12-01 1960-12-01 Tunnel furnace in gas-tight design for firing electro-ceramic materials in a protective gas atmosphere

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1258029B (en) * 1963-04-13 1968-01-04 Cremer & Breuer G M B H Tunnel furnace with an inspection channel located under the combustion channel
DE2737549A1 (en) * 1977-08-19 1979-03-01 Vgini I P Rabot Ogneupornoj Tunnel kiln for fireproof ceramics - has water locks and troughs for kiln sealing and non-lifting trolleys
FR2487491A1 (en) * 1980-07-25 1982-01-29 Bmi Vacuum furnace for continuous heat treatment of metals - esp. for hardening saw blades made of high speed steel
FR2534676A1 (en) * 1982-10-15 1984-04-20 Europ Composants Electron Pass-through oven comprising a sealing device.
DE3632936A1 (en) * 1986-09-27 1988-03-31 Haessler Andreas Pressure-compensated furnace seal
DE8914636U1 (en) * 1989-12-13 1991-04-18 Novokeram Max Wagner Gmbh, 8908 Krumbach, De
WO1992020969A1 (en) * 1991-05-10 1992-11-26 Kaus & Steinhausen Delaboriergesellschaft Mbh Plant for incinerating explosive substances
EP2264389A1 (en) * 2009-06-13 2010-12-22 Elino Industrie-Ofenbau GmbH Furnace assembly

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1258029B (en) * 1963-04-13 1968-01-04 Cremer & Breuer G M B H Tunnel furnace with an inspection channel located under the combustion channel
DE2737549A1 (en) * 1977-08-19 1979-03-01 Vgini I P Rabot Ogneupornoj Tunnel kiln for fireproof ceramics - has water locks and troughs for kiln sealing and non-lifting trolleys
FR2487491A1 (en) * 1980-07-25 1982-01-29 Bmi Vacuum furnace for continuous heat treatment of metals - esp. for hardening saw blades made of high speed steel
FR2534676A1 (en) * 1982-10-15 1984-04-20 Europ Composants Electron Pass-through oven comprising a sealing device.
DE3632936A1 (en) * 1986-09-27 1988-03-31 Haessler Andreas Pressure-compensated furnace seal
DE8914636U1 (en) * 1989-12-13 1991-04-18 Novokeram Max Wagner Gmbh, 8908 Krumbach, De
WO1992020969A1 (en) * 1991-05-10 1992-11-26 Kaus & Steinhausen Delaboriergesellschaft Mbh Plant for incinerating explosive substances
TR26432A (en) * 1991-05-10 1995-03-15 Bowas Induplan Chemie Gmbh FACILITY FOR THE BURNING OF EXPLOSIVE SUBSTANCES
US5495812A (en) * 1991-05-10 1996-03-05 Bowas-Induplan Chemie Ges.M.B.H. Plant for incinerating explosive substances
EP2264389A1 (en) * 2009-06-13 2010-12-22 Elino Industrie-Ofenbau GmbH Furnace assembly

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