EP1394490A1 - Charriot de four pour four tunnel - Google Patents

Charriot de four pour four tunnel Download PDF

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Publication number
EP1394490A1
EP1394490A1 EP03012858A EP03012858A EP1394490A1 EP 1394490 A1 EP1394490 A1 EP 1394490A1 EP 03012858 A EP03012858 A EP 03012858A EP 03012858 A EP03012858 A EP 03012858A EP 1394490 A1 EP1394490 A1 EP 1394490A1
Authority
EP
European Patent Office
Prior art keywords
kiln car
tunnel kiln
car according
chassis
refractory ceramic
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Withdrawn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
EP03012858A
Other languages
German (de)
English (en)
Inventor
Klaus Roland Heinlein
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.)
Riedhammer GmbH
Riedhammer GmbH and Co KG
Original Assignee
Riedhammer GmbH
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 Riedhammer GmbH, Riedhammer GmbH and Co KG filed Critical Riedhammer GmbH
Publication of EP1394490A1 publication Critical patent/EP1394490A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D5/0006—Composite supporting structures
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/12—Travelling or movable supports or containers for the charge
    • F27D3/123—Furnace cars
    • 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
    • F27D1/0003—Linings or walls
    • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • F27D1/0009—Comprising ceramic fibre elements

Definitions

  • the invention relates to a movable tunnel kiln car.
  • kiln cars have been known for decades. They are used to hold fuel (such as ceramics, Porcelain, ferrite), which is on the way through the oven along a product-specific temperature curve is thermally treated to sinter the product, apply a glaze to the product or the like, whereby temperatures up to 1,800 ° C are reached.
  • movable tunnel kiln car is to understand according to the invention that it is along the furnace channel must be movable. According to the invention it doesn't depend on the type of transportation. For example can the kiln car on wheels (similar to a freight car), be guided on rollers or balls. Regarding the kiln car is also subject to its geometry no restrictions. It can vary depending on the furnace cross-section (viewed in the direction of transport) a greater length than Have width. The situation can also be reversed his. The kiln car is usually supervised a more or less rectangular plan have, but this is also not mandatory.
  • Known kiln cars consist of a metal chassis a structure on refractory bricks. That is advantageous long service life and high mechanical stability. So can even heavy items to be fired can be put on easily.
  • a disadvantage is the large mass when moving the kiln car heated by the oven and cooled with must be what the thermal efficiency is negative affected.
  • the result is a reduced heat requirement for burning of the kiln.
  • the disadvantage is that the fiber products especially when exposed to high temperatures shrink. As a result, none can be permanent reach a defined contact surface for the firing material.
  • the invention has for its object a kiln car of the type mentioned, which is a symbiosis of enables thermal and mechanical properties, as they are required in industrial furnace construction and excerpts were mentioned above.
  • the invention is based on the following considerations:
  • the kiln car is (from bottom to top) in divided into at least three areas:
  • chassis which is usually made of metal as this area of the kiln car only in the lower section of the furnace duct is moved where the temperatures are well below the Temperatures for the firing material are.
  • the top of the kiln car is covered by a cover which consists of at least one layer.
  • the cover either serves the immediate absorption of the firing material.
  • So-called kiln furniture can also be used on the cover to be set up, the the assembly of the Serve firing goods. This cover must therefore have mechanical strength that the expected Withstands loads.
  • top cover would either move or decrease if the one below it lying fiber elements shrink. This would have been significant Consequences: The position of the firing material could change move. The firing table structure (the firing aids) could slip. Above all, there would be problems in connection with automatic devices, through which the kiln is placed on the kiln car or is removed from this.
  • the invention avoids these disadvantages by the top cover arranged on its own support elements becomes.
  • the exact position of the cover is therefore independent of a possible shrinking process of the one below lying fiber parts.
  • the cover will in any case over the own support elements in the desired held precise location.
  • the base plateau can be designed as in the prior art his.
  • it consists of a metal body, to which the means of transport are also attached.
  • the fireproof structure is located on the base plateau of the kiln car.
  • the plates can be on one or both sides be profiled, for example on one side Knobs in corresponding openings of an adjacent one Intervene. In this way, the Stability of a structure made of refractory components be significantly increased.
  • the support elements mentioned are, for example, on the car chassis attached. They can be made from refractory ceramic Bars, cylinders, plates or the like exist.
  • the support elements are as fireproof ceramic hollow body (like a cylinder) designed.
  • Chassis can be provided with additional metallic mounts be attached to the base plateau, for example be welded.
  • a metallic sleeve is welded onto a base plate of the chassis and serves to accommodate a cylindrical support element.
  • the upper free ends of the support elements all of them lying on a horizontal plane form contact surfaces for the top cover that, for example, from one or more plates that are side by side, if necessary, they can also be arranged one above the other can.
  • the individual elements can be supported by tongue and groove connections be connected to each other.
  • This top cover can be made from a traditional refractory material.
  • plates based on mullite are suitable.
  • high-density fiber mats can also be used for this purpose, for example so-called ceramic fiber vacuum molded plates with a density of more than 300 kg / m 3 .
  • the support elements not only create a defined one Support surface for the cover. They also make sure that cover throughout the pyro process a defined distance from the bottom of the furnace duct or to the car chassis and also after Leaving the oven so that the one placed on it Firing material always has a defined position to it afterwards Lose weight via automatic devices or to be able to put on new firing material.
  • the plate-shaped elements of the cover can in Knobs protruding towards the support elements have, which in corresponding openings of the support elements and / or the layer running underneath.
  • a material is particularly suitable for the support elements with the lowest possible coefficient of thermal expansion within the expected temperature load.
  • the Support elements should not be technically relevant thermal Have length change, the term "technical relevant"to understand is that the function the entire facility, including the associated certificate Unloading stations, be fully guaranteed got to.
  • the only figure shows a longitudinal section through one Kiln car, the direction of transport perpendicular to Drawing plane runs.
  • the reference number 10 denotes a car chassis, that essentially from a revolving Frame 10r consists of a (not recognizable) carries metallic base plate.
  • Flanges 10f are hinged to the frame 10r, one of which Axis 10a is fixed with end wheels 10w.
  • the Kiln car as is common in the prior art, has two axes.
  • Metallic aprons 10s are also known sides of the frame 10r running in the transport direction protrude vertically downwards and in particular a shielding function to have.
  • the sleeves 12 are open at the top and serve to accommodate ceramic tubes 14 which are described in more detail below.
  • first row 16.1 of conventional firebricks 18 that are mortared among themselves.
  • second row (layer) 16.2 of lightweight fire bricks 20 Located above a second row (layer) 16.2 of lightweight fire bricks 20, the stones 20 a slightly larger format than the stones have 18.
  • third level 16.3 runs another layer of lightweight fire bricks, here in the form of large-format plates 22.
  • the stones 18, 20 have knobs on their top (not shown) on the corresponding recesses (not shown) on the underside of the stones above intervention.
  • the stone layers 16.1, 16.2, 16.3 follow upwards three fiber layers 24.1, 24.2 and 24.3. These layers are made of large format alumina fibreboards 26 formed, the plates of the layers 24.1 and 24.2 on the outside (in the plane of the drawing right and left) protrude to a known Form sealing surface to a furnace wall (not shown).
  • the dimensioning is the Divide so that the plates 26 of the top layer 24.3 Align the top with the free ends of the tubes 14.
  • the figure shows that the tubes 14 pass through all of them Extend layers 24.3, 24.2, 24.1, 16.3, 16.2 and 16.1, that is, the corresponding stones respectively Plates have corresponding openings or the respective layer is around the tubes 16 or sleeves 14 passed around.
  • the kiln car is made from a layer 28 on the upper side completed two mullite plates 28.1, 28.2, which in Direction of transport run side by side.
  • Each plate 28.1, 28.2 is supported on the outside four pipes 14 each and on the inside (at 30) a part of the end face of the middle in the figure Row of tubes, the plates 28.1, 28.2 underside Have knobs in the corresponding pipe sections protrude so that the plates 28.1, 28.2 the desired one, precisely and horizontally aligned Cover the kiln car.
  • Firing material is shown schematically in the figure, which are placed on the plates 28.1, 28.2 can, either directly or indirectly (via appropriate kiln furniture).
  • h is the distance from the surface of the Plates 28.1, 28.2 to the tread of the wagon wheels 10w designated. This distance (h) is important because it at the same time the placement of the fired goods on the kiln car Are defined. This is in turn for automatic detection Unloading equipment important outside the furnace are arranged to automatically move the firing material to the To be able to put or remove the kiln car.
  • shrinkage occurs over time of the fiber parts 26, it can be between the cover plates 28.1 and the underlying fiberboard 26 create a horizontal gap.
  • the plates 28.1, 28.2 but do not sag because they are more defined Position on the tubes 14, which is therefore a Support function, so that the distance h to Tread of the wheels 10w is kept constant.
  • the material for the pipes (support elements) 14 preferably uses a material that the lowest possible coefficient of thermal expansion in the temperature interval which the Pass through the kiln car between the kiln entrance and the kiln exit got to.
  • Fiber material (as for 24.1, 24.2, 24.3) Lightweight bricks (like 20) Firebricks (like 18) Application temperature ° C 1750 1430 1450 Chemical analysis (wt%) Al 2 O 3 80 58 45 SiO 2 18 39 50 other 2 3 5 Bulk density [kg / m 3 ] 400 780 2250 Thermal conductivity [W / mK] 1000 ° C 0.24 0.33 1.32 1200 ° C 0.28 0.35 1.35 1400 ° C 0.35 - -

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Tunnel Furnaces (AREA)
EP03012858A 2002-08-28 2003-06-06 Charriot de four pour four tunnel Withdrawn EP1394490A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10239349 2002-08-28
DE10239349 2002-08-28

Publications (1)

Publication Number Publication Date
EP1394490A1 true EP1394490A1 (fr) 2004-03-03

Family

ID=31197437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03012858A Withdrawn EP1394490A1 (fr) 2002-08-28 2003-06-06 Charriot de four pour four tunnel

Country Status (1)

Country Link
EP (1) EP1394490A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115679047A (zh) * 2022-11-10 2023-02-03 包头市信宏机电设备制造有限公司 一种用于生产取向硅钢的双车位隧道炉台车结构

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3377670A (en) * 1966-08-10 1968-04-16 Davis Fire Brick Company Composite car top tile
EP0134188A1 (fr) * 1983-08-10 1985-03-13 Karl Walter & Co. - GmbH. & Co. KG Voiture pour four de cuisson
US4721459A (en) * 1986-06-30 1988-01-26 Ferro Corporation Modular, insulating kiln car top
DE3821589A1 (de) * 1987-06-27 1989-01-05 Keller Ofenbau Gmbh Ofenwagen fuer einen tunnelofen der keramischen industrie
DE3832358A1 (de) * 1988-09-23 1990-04-05 Keller Gmbh & Co Kg Tunnelofenwagen (fuer die keram. industrie)
DE19813226A1 (de) * 1998-03-26 1999-09-30 Andreas Haesler Unterlüftete Ferro - Keramische - Brennwagenplattform
EP1136779A1 (fr) * 2000-03-22 2001-09-26 Wienerberger Ziegelindustrie Aktiengesellschaft Chariot pour le transport d'articles céramiques

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3377670A (en) * 1966-08-10 1968-04-16 Davis Fire Brick Company Composite car top tile
EP0134188A1 (fr) * 1983-08-10 1985-03-13 Karl Walter & Co. - GmbH. & Co. KG Voiture pour four de cuisson
US4721459A (en) * 1986-06-30 1988-01-26 Ferro Corporation Modular, insulating kiln car top
DE3821589A1 (de) * 1987-06-27 1989-01-05 Keller Ofenbau Gmbh Ofenwagen fuer einen tunnelofen der keramischen industrie
DE3832358A1 (de) * 1988-09-23 1990-04-05 Keller Gmbh & Co Kg Tunnelofenwagen (fuer die keram. industrie)
DE19813226A1 (de) * 1998-03-26 1999-09-30 Andreas Haesler Unterlüftete Ferro - Keramische - Brennwagenplattform
EP1136779A1 (fr) * 2000-03-22 2001-09-26 Wienerberger Ziegelindustrie Aktiengesellschaft Chariot pour le transport d'articles céramiques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115679047A (zh) * 2022-11-10 2023-02-03 包头市信宏机电设备制造有限公司 一种用于生产取向硅钢的双车位隧道炉台车结构

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