US3487135A - Method of firing continously operating kilns for ceramic products - Google Patents

Method of firing continously operating kilns for ceramic products Download PDF

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Publication number
US3487135A
US3487135A US530192A US53019266A US3487135A US 3487135 A US3487135 A US 3487135A US 530192 A US530192 A US 530192A US 53019266 A US53019266 A US 53019266A US 3487135 A US3487135 A US 3487135A
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United States
Prior art keywords
firing
kiln
flow
kilns
air
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Expired - Lifetime
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US530192A
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English (en)
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Andreas Haessler
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Individual
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Individual
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Priority claimed from DE1965H0055338 external-priority patent/DE1288752B/de
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    • 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
    • F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases

Definitions

  • ABSTRACT OF THE DISCLOSURE A method of firing continuously operating kilns for ceramics and like products including the step of causing the firing gas to flow alternately with and against the movement of material being fired.
  • the alternate flow is preferably rhythmic and adjustable.
  • a method is provided according to the invention, which, in a simple manner, makes it possible considerably to improve the heat exchange in a continuous kiln so that higher throughput and quality can be achieved.
  • FIG. 1 illustrates the known counter flow method in a tunnel kiln, the flue gas being exhausted at the entry to the kiln by a chimney 1.
  • the firing air is moved in the opposite direction to that of the material to be fired placed on the trolley 2.
  • the direction of the air flow in the kiln is periodically reversed so that the chamber of the kiln is operated at short intervals of the time with the air flowing alternately in the opposite and in the same direction as the material to be fired is moving.
  • the duration of the flow in each direction may be selected as is suitable and if desired, may be different in each direction.
  • the air pressures in each direction may be selected at will in accordance with requirements.
  • a connection pipe 5 may also be provided.
  • a fan located in the flue gas chimney 1 may be used.
  • the firing method according to the invention may be partially used also in firing kilns forceramics which are operated in the continuous or reversing principle, as shown in FIGS. 3 and 4.
  • the reference numbers 1, 2 and 5 indicate in FIGS. 3 and 4 the corresponding parts similarly marked in FIGS. 1 and 2. Only the fans 6 to 10 which replace to the fans 3 and 4 in FIG. 2 have been remarked due to the altered arrangement of the flow circuits.
  • the method can be used for example only in the heating up, cooling, or firing zone.
  • a use is furthermore also possible in such a way that, in the reversing method according to the invention, in each case only two zones are inclnded.
  • the method may also be used in such a way that the individual reversed flows overlap (FIG. 4).
  • the heating up and the cooling, especially the latter, of ceramic products present considerable difficulties which are only met in an imperfect manner by the known counter-flow firing method with which tunnel kilns for example are frequently operated.
  • the new reversing flow firing method makes it possible, for example in the cooling process, to move a considerably larger amount of air in alternating directions, and indeed, does not damage the throughput of air through the cooling zone. Thereby very good heat transfer relationships are provided for an even cooling or heating up.
  • rhythmic reversible flow circuit through one kiln is returned through at least a second kiln.
  • a method of firing continuously operating kilns for ceramic products comprising the steps of causing a firing gas to flow through at least part of the kiln opposite to the direction of passage through the kiln of the material to be fired, and superposing on said flow a rhythmically lengthwise oscillating gas flow alternately opposite to and in the same direction as the direction of passage through the kiln of the material to be fired.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Details (AREA)
US530192A 1965-03-01 1966-02-25 Method of firing continously operating kilns for ceramic products Expired - Lifetime US3487135A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1965H0055338 DE1288752B (de) 1965-03-01 1965-03-01 Verfahren zum Betrieb von Tunneloefen u. dgl. fuer das Brennen von keramischen Erzeugnissen
DEH57838A DE1301436B (de) 1965-03-01 1965-11-25 Verfahren zum Betrieb von Tunneloefen u. dgl. fuer das Brennen von keramischen Erzeugnissen

Publications (1)

Publication Number Publication Date
US3487135A true US3487135A (en) 1969-12-30

Family

ID=25980264

Family Applications (1)

Application Number Title Priority Date Filing Date
US530192A Expired - Lifetime US3487135A (en) 1965-03-01 1966-02-25 Method of firing continously operating kilns for ceramic products

Country Status (8)

Country Link
US (1) US3487135A (nl)
AT (1) AT262131B (nl)
BE (1) BE677112A (nl)
CH (1) CH457729A (nl)
DE (1) DE1301436B (nl)
DK (1) DK107668C (nl)
GB (1) GB1120640A (nl)
NL (1) NL150411B (nl)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4246215A (en) * 1979-06-06 1981-01-20 General Electric Company Method for firing low density graphite/alumina compacts and cores
US4278631A (en) * 1978-09-04 1981-07-14 Salviati Impianti S.P.A. Method and installation for producing bricks
US4495118A (en) * 1983-04-08 1985-01-22 Nippon Chemiphar Co., Ltd. Ceramic plates and method for the production thereof

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2643406C3 (de) * 1976-09-27 1980-07-03 Haessler, Andreas, Ing.(Grad.), 7904 Erbach Tunnelofen mit Direktbefeuerung
JPS62223594A (ja) * 1986-03-22 1987-10-01 日本碍子株式会社 窯炉における焼成品の冷却方法
DE3826957A1 (de) * 1988-08-09 1990-02-15 Haessler Andreas Dipl Ing Fh Mehrstrom - niederdruck - tunnelofen mit integrierter thermischer abgasreinigung
DE4423221A1 (de) * 1994-07-01 1996-01-04 Lingl Anlagenbau Wärmeübergang im Tunnelofen
DE19523513A1 (de) * 1995-06-30 1997-01-02 Keller Gmbh Verfahren zum Brennen von Lochziegeln und Tunnelofen zur Durchführung des Verfahrens

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US873568A (en) * 1906-11-15 1907-12-10 John W Jones Method of treating brick.
US1281489A (en) * 1918-06-14 1918-10-15 William N Best Furnace for annealing or heat treating.
US1488910A (en) * 1920-02-25 1924-04-01 American Dressler Tunnel Kilns Continuous heating method and apparatus
US1505768A (en) * 1923-07-26 1924-08-19 American Dressler Tunnel Kilns Tunnel kiln and method of operating same
US1522166A (en) * 1921-11-28 1925-01-06 American Dressler Tunnel Kilns Kiln and method of operating same
US3119166A (en) * 1961-08-01 1964-01-28 Ostermaier Leo Kiln for ceramics
US3242241A (en) * 1961-10-27 1966-03-22 Coumans Schepers N V Method of controlling the pyrochemical bonding of a clay-carbon system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US873568A (en) * 1906-11-15 1907-12-10 John W Jones Method of treating brick.
US1281489A (en) * 1918-06-14 1918-10-15 William N Best Furnace for annealing or heat treating.
US1488910A (en) * 1920-02-25 1924-04-01 American Dressler Tunnel Kilns Continuous heating method and apparatus
US1522166A (en) * 1921-11-28 1925-01-06 American Dressler Tunnel Kilns Kiln and method of operating same
US1505768A (en) * 1923-07-26 1924-08-19 American Dressler Tunnel Kilns Tunnel kiln and method of operating same
US3119166A (en) * 1961-08-01 1964-01-28 Ostermaier Leo Kiln for ceramics
US3242241A (en) * 1961-10-27 1966-03-22 Coumans Schepers N V Method of controlling the pyrochemical bonding of a clay-carbon system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4278631A (en) * 1978-09-04 1981-07-14 Salviati Impianti S.P.A. Method and installation for producing bricks
US4246215A (en) * 1979-06-06 1981-01-20 General Electric Company Method for firing low density graphite/alumina compacts and cores
US4495118A (en) * 1983-04-08 1985-01-22 Nippon Chemiphar Co., Ltd. Ceramic plates and method for the production thereof

Also Published As

Publication number Publication date
BE677112A (fr) 1966-07-18
GB1120640A (en) 1968-07-24
DE1301436B (de) 1969-08-21
NL150411B (nl) 1976-08-16
NL6602566A (nl) 1966-09-02
CH457729A (de) 1968-06-15
DK107668C (da) 1967-06-19
AT262131B (de) 1968-05-27

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