US3559968A - Tunnel kilns - Google Patents

Tunnel kilns Download PDF

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Publication number
US3559968A
US3559968A US841699A US3559968DA US3559968A US 3559968 A US3559968 A US 3559968A US 841699 A US841699 A US 841699A US 3559968D A US3559968D A US 3559968DA US 3559968 A US3559968 A US 3559968A
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US
United States
Prior art keywords
kiln
trolley
brick
bridging
roof structure
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 - Lifetime
Application number
US841699A
Other languages
English (en)
Inventor
Gregor Buschermohle
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.)
Keller Ofenbau GmbH
Original Assignee
Keller Ofenbau GmbH
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 Keller Ofenbau GmbH filed Critical Keller Ofenbau GmbH
Application granted granted Critical
Publication of US3559968A publication Critical patent/US3559968A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/32—Casings

Definitions

  • a tunnel kiln includes a suspended roof which is spaced at each longitudinal edge from the sidewalls, the intermediate space is filled with a series of refractory bricks each of which is profiled so that its lower surface lies close to the upper surface of an unladen part of the ceramic ware trolley of the kiln.
  • This invention relates to a flat firing tunnel kiln for ceramic ware. particularly bricks. with a roof preferably of the suspended type so supported in relation to the two longitudinal sides of the kiln as to leave a space, in the transverse direction, between each of the long sides and the roof.
  • An object of the invention is to provide a kiln in which the frame of the firing trolley and seals of the kiln are afforded a high degree of protection against heat radiation, to prevent damage thereto.
  • a tunnel kiln for ceramic ware a roof structure, two longitudinally extending sidewalls both of which are spaced from respective side edges of the roof structure, at least one refractory brick bridging the space between the roof and one sidewall, at least one refractory brick bridging the space between the roof and the other sidewall, and a trolley having an upper surface, said trolley being capable of carrying ceramic ware through the kiln, each said bridging brick having a lower surface which is closely spaced from an unladen portion of the upper surface of the trolley whereby flow of high-temperature gases through the space between the roof structure and the sidewalls is restricted.
  • FIG. I is a cross section through a portion of one embodiment of a flat firing kiln in accordance with the invention.
  • FIG. 2 is a cross section through a portion of a second embodiment of a flat firing kiln in accordance with the invention.
  • the flat firing tunnel kiln can accommodate a firing trolley 3, which is moved through the firing chamber 2 of the kiln.
  • the firing trolley 3 carries flat objects 4, for example, bricks.
  • a suspended roof 5 Above the ware to be fired is a suspended roof 5, the connection of which to the kiln wall 6 consists of a side or bridging brick 7 or 8, made of a refractory material.
  • a projection 7a or 8a, on this side brick 7 or 8 rests on a part of the suspended roof, while a channel 9, in the longitudinal sidewall 6 of the kiln, supports the other end 7h or 8b, of the side brick 7 or 8.
  • the side brick 7 or 8 may be rectangular in shape, or it may be profiled to other shapes and provided with a shoulder on the side that faces towards the firing trolley.
  • the side brick 7 or 8 is so arranged that only a small gap 10 or I I lies between the lower horizontal surface thereof and the unladen part of the upper surface of the trolley 3. The effect of this is that the lower structure of the firing trolley 3 and a side seal 12 of the kiln are protected from the high temperature kiln atmosphere, so that these parts cannot be damaged.
  • the lower horizontal face of the brick 7 whereas the lower horizontal face of the brick 8 of the second embodiment has a longitudinally extending ridge 13 along the edge thereof remote from the longitudinal sidewall.
  • the ridge 13 extends into a groove 14 formed in the upper surface of the trolley 3 thus forming an additional restriction to the sideways flow of hot kiln gases.
  • a trolley having an upper surface, said trolley being capable of carrying ceramic ware through the kiln;
  • each said bridging brick having a lower surface which is closely spaced from an unladen portion of the upper surface of the trolley whereby flow of high-temperature gases through the space between the roof structure and the sidewalls is restricted.
  • each bridging brick is supported by the roof structure and by the corresponding longitudinal wall.
  • each longitudinal sidewall has a corresponding upwardly facing surface
  • each said bridging brick being supported at lateral edge surfaces thereof, by said upwardly facing surfaces of the roof structure and of the sidewalls.
  • each bridging brick has a longitudinally extending, downwardly projecting ridge and the upper surface of the trolley has a longitudinally extending groove, said ridge extending into said groove.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
US841699A 1968-09-05 1969-07-15 Tunnel kilns Expired - Lifetime US3559968A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681758940 DE1758940B1 (de) 1968-09-05 1968-09-05 Flachbrandtunnelofen fuer keramische erzeugnisse insbesondere ziegel

Publications (1)

Publication Number Publication Date
US3559968A true US3559968A (en) 1971-02-02

Family

ID=5695301

Family Applications (1)

Application Number Title Priority Date Filing Date
US841699A Expired - Lifetime US3559968A (en) 1968-09-05 1969-07-15 Tunnel kilns

Country Status (5)

Country Link
US (1) US3559968A (de)
AT (1) AT287566B (de)
DE (1) DE1758940B1 (de)
FR (1) FR1599546A (de)
GB (1) GB1210910A (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1738580A (en) * 1924-08-15 1929-12-10 American Arch Co Furnace arch
US2013905A (en) * 1933-02-04 1935-09-10 Jr James L Adams Circular ingot heating furnace
US2676793A (en) * 1950-07-11 1954-04-27 Jones Herbert Open hearth furnace

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH41396A (de) * 1907-07-07 1908-10-16 Johann Rappold Kanalofen mit fahrbarem Herd
DE737707C (de) * 1937-05-08 1943-07-21 Friedrich Dettmer Dipl Ing Schnellbrandtunnelofen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1738580A (en) * 1924-08-15 1929-12-10 American Arch Co Furnace arch
US2013905A (en) * 1933-02-04 1935-09-10 Jr James L Adams Circular ingot heating furnace
US2676793A (en) * 1950-07-11 1954-04-27 Jones Herbert Open hearth furnace

Also Published As

Publication number Publication date
FR1599546A (de) 1970-07-15
AT287566B (de) 1971-01-25
DE1758940B1 (de) 1971-04-01
GB1210910A (en) 1970-11-04

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