EP0012660B2 - Protection device for the discharge end of a rotary-drum furnace - Google Patents

Protection device for the discharge end of a rotary-drum furnace Download PDF

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Publication number
EP0012660B2
EP0012660B2 EP79400952A EP79400952A EP0012660B2 EP 0012660 B2 EP0012660 B2 EP 0012660B2 EP 79400952 A EP79400952 A EP 79400952A EP 79400952 A EP79400952 A EP 79400952A EP 0012660 B2 EP0012660 B2 EP 0012660B2
Authority
EP
European Patent Office
Prior art keywords
ring
shell
kiln
flange
support
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
Application number
EP79400952A
Other languages
German (de)
French (fr)
Other versions
EP0012660A1 (en
EP0012660B1 (en
Inventor
Alain Chielens
Bernard Boussekey
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.)
Fives Cail Babcock SA
Original Assignee
Fives Cail Babcock SA
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
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Application filed by Fives Cail Babcock SA filed Critical Fives Cail Babcock SA
Priority to AT79400952T priority Critical patent/ATE144T1/en
Publication of EP0012660A1 publication Critical patent/EP0012660A1/en
Application granted granted Critical
Publication of EP0012660B1 publication Critical patent/EP0012660B1/en
Publication of EP0012660B2 publication Critical patent/EP0012660B2/en
Expired 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
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/22—Rotary drums; Supports therefor
    • F27B7/224—Discharge ends

Definitions

  • the present invention relates to a device for protecting the mouth of a rotary tubular oven at the outlet end of hot products.
  • the known protection devices consist of a ring formed of several segments fixed on the end of the shell of the oven and cooled by air circulation. This ring is brought to very high temperatures and, if the treated products are abrasive, subjected to significant wear. Its lifespan is therefore relatively short and the segments which constitute it must be replaced frequently. Since these segments are fairly complex parts, generally made of cast steel, their replacement is costly. In addition, certain types of attachment make disassembly of worn or damaged segments very difficult.
  • the object of the invention is to provide a simple and less expensive protection device.
  • the protective device which is the subject of the invention is characterized in that it consists of a refractory concrete ring which covers the internal surface of the end of the furnace shell and the front face of a flange forming part of a metal support fixed on the end of the furnace shell, this ring being attached to said support by anchoring elements fixed on the latter.
  • the part of the shell covered by the concrete ring is limited, towards the interior of the furnace, by an annular stop, welded on the ferrule and serving as a stop for the briquetting of the furnace so as to eliminate parasitic thrusts on the 'ring.
  • the connections between the anchoring elements and the ferrule or the flange have a certain clearance allowing the differential expansions of the ring, the ferrule and the flange; expansion joints are provided on the ring.
  • a belt attached to the outer edge of the flange serves as a peripheral support for the ring.
  • This belt can be extended towards the rear of the flange and is connected to a ferrule concentric with the furnace ferrule and defining with it a passage with annular section for the circulation of cooling air.
  • this passage is divided into a outward path and a return path by a third ferrule placed between the two others and ending at a certain distance from the flange, so that the cooling air using the outward path comes to lick the face. back of the flange then flows through the return path, along the furnace shell.
  • the ring is divided into two parts by a cylindrical seal located approximately in the extension of the interior surface of the ferrule.
  • a cylindrical seal located approximately in the extension of the interior surface of the ferrule.
  • the outer part of the ring can be made of precast concrete blocks secured to a metal support which is fixed on the end of the ferrule, by means of bolts, keys or any other known fixing means; the strap and the belt are then formed of elements constituting said support.
  • This figure shows the end of a rotary tubular oven which opens into a fixed cover fitted with a burner, not shown, entering the oven.
  • the hot products are evacuated by gravity at this end of the oven.
  • the oven consists of a metal ferrule 16 and an inner lining of refractory bricks 18. This lining is stopped at a certain distance from the end of the ferrule against a ring 20 forming a stop which is welded inside the ferrule.
  • the oven is surrounded by two concentric ferrules 22 and 24 assembled and fixed to the ferrule 16 by means of elastic spacers.
  • the end of the shell 16 is protected by a refractory concrete ring 36.
  • a cylindrical joint 42 is provided in the ring 36; this joint divides the ring into an inner part and an outer part. Joints located in radial planes are provided in the two parts of the ring to prevent dynamic deformations of the shell from causing the concrete ring to break.
  • the outer part of the ring is formed from precast concrete blocks 44. These blocks are molded on a support to which they are attached by anchoring elements 38 mounted with play on this support.
  • This support is formed of three welded parts: a cylindrical part 48 whose end rests on the shell 16 of the furnace and which is provided with lugs 49 fixed on this shell by means of pins 50 and keys 52, a part 54 arranged perpendicular to the part 48 and having the shape of a ring segment and a part 56 of cylindrical shape welded to the edge of the part 54, perpendicular to the latter.
  • the pieces 54 form an outer flange whose plane is perpendicular to the axis of the furnace and the pieces 56 form a belt extending on either side of the flange.
  • the rear part of this belt surrounds the adjacent end of the ferrule 24 with slight play.
  • the end of the ferrule 22 is spaced from the flange so as to establish communication between the two annular section passages 30 and 32 formed by the ferrules 16, 22 and 24. Fresh air supplied by the external passage 30 can so come and lick the flange then the ferrule 16. to cool them.
  • the inner part 36 ′ of the ring is cast after the blocks 44 have been put in place.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Drying Of Solid Materials (AREA)
  • Soil Working Implements (AREA)
  • Jellies, Jams, And Syrups (AREA)
  • Insulated Conductors (AREA)
  • Photographic Developing Apparatuses (AREA)

Abstract

This invention concerns a system for the protection of the delivery end of a rotary kiln. This system is characterized by the fact that it consists of a refractory concrete ring covering the internal surface of the end of the kiln shell and the front surface of a flange attached to the outside of the end of the shell, the ring being fastened to the shell and the flange by anchorage units fixed on them. The invention can be used in the cement production and minerals processing industries.

Description

La présente invention a pour objet un dispositif pour protéger l'embouchure d'un four tubulaire rotatif à l'extrémité de sortie des produits chauds.The present invention relates to a device for protecting the mouth of a rotary tubular oven at the outlet end of hot products.

Les dispositifs de protection connus sont constitués par un anneau formé de plusieurs segments fixés sur l'extrémité de la virole du four et refroidis par circulation d'air. Cet anneau est porté à des températures très élevées et, si les produits traités sont abrasifs, soumis à une usure importante. Sa durée de vie est donc relativement courte et les segments qui le constituent doivent être remplacés fréquemment. Comme ces segments sont des pièces assez complexes, généralement en acier moulé, leur remplacement est coûteux. De plus, certains types de fixation rendent le démontage des segments usés ou détériorés très difficile.The known protection devices consist of a ring formed of several segments fixed on the end of the shell of the oven and cooled by air circulation. This ring is brought to very high temperatures and, if the treated products are abrasive, subjected to significant wear. Its lifespan is therefore relatively short and the segments which constitute it must be replaced frequently. Since these segments are fairly complex parts, generally made of cast steel, their replacement is costly. In addition, certain types of attachment make disassembly of worn or damaged segments very difficult.

Le but de l'invention est de réaliser un dispositif de protection simple et moins coûteux. Le dispositif de protection objet de l'invention est caractérisé en ce qu'il est constitué par un anneau en béton réfractaire qui recouvre la surface intérieure de l'extrémité de la virole du four et la face avant d'une bride faisant partie d'un support métallique fixé sur l'extrémité de la virole du four, cet anneau étant accroché au dit support par des éléments d'ancrage fixés sur celui-ci.The object of the invention is to provide a simple and less expensive protection device. The protective device which is the subject of the invention is characterized in that it consists of a refractory concrete ring which covers the internal surface of the end of the furnace shell and the front face of a flange forming part of a metal support fixed on the end of the furnace shell, this ring being attached to said support by anchoring elements fixed on the latter.

La partie de la virole recouverte par l'anneau en béton est limitée, vers l'intérieur du four, par une butée annulaire, soudée sur la virole et servant d'arrêt pour le briquetage du four de façon à éliminer les poussées parasites sur l'anneau. De préférence, les liaisons entre les éléments d'ancrage et la virole ou la bride présentent un certain jeu permettant les dilatations différentielles de l'anneau, de la virole et de la bride; des joints de dilatation sont prévus sur l'anneau.The part of the shell covered by the concrete ring is limited, towards the interior of the furnace, by an annular stop, welded on the ferrule and serving as a stop for the briquetting of the furnace so as to eliminate parasitic thrusts on the 'ring. Preferably, the connections between the anchoring elements and the ferrule or the flange have a certain clearance allowing the differential expansions of the ring, the ferrule and the flange; expansion joints are provided on the ring.

Une ceinture fixée sur le bord extérieur de la bride sert de support périphérique à l'anneau. Cette ceinture peut se prolonger vers l'arrière de la bride et se raccorder à une virole concentrique à la virole du four et définissant avec celle-ci un passage à section annulaire pour la circulation d'air de refroidissement. Avantageusement, ce passage est divisé en une voie aller et une voie retour par une troisième virole placée entre les deux autres et se terminant à une certaine distance de la bride, de façon que l'air de refroidissement empruntant la voie aller vienne lécher la face arrière de la bride puis s'écoule par la voie retour, le long de la virole du four.A belt attached to the outer edge of the flange serves as a peripheral support for the ring. This belt can be extended towards the rear of the flange and is connected to a ferrule concentric with the furnace ferrule and defining with it a passage with annular section for the circulation of cooling air. Advantageously, this passage is divided into a outward path and a return path by a third ferrule placed between the two others and ending at a certain distance from the flange, so that the cooling air using the outward path comes to lick the face. back of the flange then flows through the return path, along the furnace shell.

De préférence, l'anneau est divisé en deux parties par un joint cylindrique situé approximativement dans le prolongement de la surface intérieure de la virole. Dans ce cas, on forme d'abord la partie extérieure de l'anneau qui est accrochée à la bride, puis la partie intérieure qui est accrochée à la virole et s'appuie sur la partie extérieure.Preferably, the ring is divided into two parts by a cylindrical seal located approximately in the extension of the interior surface of the ferrule. In this case, we first form the outer part of the ring which is attached to the flange, then the inner part which is attached to the shell and rests on the outer part.

La partie extérieure de l'anneau peut être formée de blocs de béton préfabriqués solidaires d'un support métallique qui vient se fixer sur l'extrémité de la virole, au moyen de boulons, clavettes ou tout autre moyen de fixation connu; la bride et la ceinture sont alors formées d'éléments constituant ledit support.The outer part of the ring can be made of precast concrete blocks secured to a metal support which is fixed on the end of the ferrule, by means of bolts, keys or any other known fixing means; the strap and the belt are then formed of elements constituting said support.

D'autres caractéristiques de l'invention apparaîtront à la lecture de la description qui suit et se réfère aux dessins l'accompagnant qui montrent, à titre d'exemple non limitatif, un mode de réalisation de l'invention et sur lesquels:

  • L'unique figure est une coupe par un plan diamétral de l'extrémité de sortie d'un four tubulaire rotatif réalisé conformément à l'invention.
Other characteristics of the invention will appear on reading the description which follows and refers to the accompanying drawings which show, by way of nonlimiting example, an embodiment of the invention and in which:
  • The only figure is a section through a diametrical plane of the outlet end of a rotary tubular oven produced in accordance with the invention.

Cette figure montre l'extrémité d'un four tubulaire rotatif qui débouche dans un capot fixe équipé d'un brûleur, non représenté, pénétrant dans le four. Les produits chauds sont évacués par gravité à cette extrémité du four. Le four est constitué d'une virole métallique 16 et d'un revêtement intérieur en briques réfractaires 18. Ce revêtement est arrêté à une certaine distance de l'extrémité de la virole contre un anneau 20 formant butée qui est soudé à l'intérieur de la virole.This figure shows the end of a rotary tubular oven which opens into a fixed cover fitted with a burner, not shown, entering the oven. The hot products are evacuated by gravity at this end of the oven. The oven consists of a metal ferrule 16 and an inner lining of refractory bricks 18. This lining is stopped at a certain distance from the end of the ferrule against a ring 20 forming a stop which is welded inside the ferrule.

Le four est entouré de deux viroles concentriques 22 et 24 assemblées et fixées sur la virole 16 au moyen d'entretoises élastiques.The oven is surrounded by two concentric ferrules 22 and 24 assembled and fixed to the ferrule 16 by means of elastic spacers.

L'extrémité de la virole 16 est protégée par un anneau en béton réfractaire 36. Un joint cylindrique 42 est prévu dans l'anneau 36; ce joint divise l'anneau en une partie intérieure et une partie extérieure. Des joints situés dans des plans radiaux sont prévus dans les deux parties de l'anneau pour éviter que les déformations dynamiques de la virole ne provoquent la cassure de l'anneau de béton.The end of the shell 16 is protected by a refractory concrete ring 36. A cylindrical joint 42 is provided in the ring 36; this joint divides the ring into an inner part and an outer part. Joints located in radial planes are provided in the two parts of the ring to prevent dynamic deformations of the shell from causing the concrete ring to break.

La partie extérieure de l'anneau est formée de blocs de béton préfabriqués 44. Ces blocs sont moulés sur un support auquel ils sont accrochés par des éléments d'ancrage 38 montés avec jeu sur ce support.The outer part of the ring is formed from precast concrete blocks 44. These blocks are molded on a support to which they are attached by anchoring elements 38 mounted with play on this support.

Ce support est formé de trois pièces soudées: une pièce de forme cylindrique 48 dont l'extrémité repose sur la virole 16 du four et qui est munic de pattes 49 fixées sur cette virole au moyen d'axes 50 et de clavettes 52, une pièce 54 disposée perpendiculairement à la pièce 48 et ayant la forme d'un segment d'anneau et une pièce 56 de forme cylindrique soudée sur le bord de la pièce 54, perpendiculairement à celle-ci. Lorsque les blocs 44 sont en place, les pièces 54 forment une bride extérieure dont le plan est perpendiculaire à l'axe du four et les pièces 56 forment une ceinture s'étendant de part et d'autre de la bride. La partie arrière de cette ceinture entoure avec un faible jeu l'extrémité adjacente de la virole 24.This support is formed of three welded parts: a cylindrical part 48 whose end rests on the shell 16 of the furnace and which is provided with lugs 49 fixed on this shell by means of pins 50 and keys 52, a part 54 arranged perpendicular to the part 48 and having the shape of a ring segment and a part 56 of cylindrical shape welded to the edge of the part 54, perpendicular to the latter. When the blocks 44 are in place, the pieces 54 form an outer flange whose plane is perpendicular to the axis of the furnace and the pieces 56 form a belt extending on either side of the flange. The rear part of this belt surrounds the adjacent end of the ferrule 24 with slight play.

L'extrémité de la virole 22 est espacée de la bride de façon à établir une communication entre les deux passages à section annulaire 30 et 32 formés par les viroles 16, 22 et 24. De l'air frais amené par le passage extérieur 30 peut ainsi venir lécher la bride puis la virole 16. pour les refroidir.The end of the ferrule 22 is spaced from the flange so as to establish communication between the two annular section passages 30 and 32 formed by the ferrules 16, 22 and 24. Fresh air supplied by the external passage 30 can so come and lick the flange then the ferrule 16. to cool them.

La partie intérieure 36' de l'anneau est coulée après mise en place des blocs 44.The inner part 36 ′ of the ring is cast after the blocks 44 have been put in place.

Claims (8)

1. Protective device for the discharge end of a rotary kiln fitted with a burner, characterized in that it is constituted by a refractory concrete ring (36', 44) which covers the internal surface of the kiln shell end (16) and the front face of a flange (54) which is a part of a metal support (48, 54) secured to the kiln shell end, this ring being attached to the said support by anchoring elements (38) secured thereto.
2. Device according to claim 1, characterized in that the part of the kiln shell (16) covered by the concrete ring (36) is limited, towards the inside of the kiln, by a ring-shaped stop (20) welded to the shell (16) and acting as an abut- mentforthe kiln internal lining (18).
3. Device according to claim 1 or 2, characterized in that the connections between the anchoring elements (38) and the support (48, 54) have a clearance for differential expansion of the ring, shell and flange.
4. Device according to claim 1, 2 or 3, characterized in that the ring (36) is supported over its periphery by a rim (56) secured to the external edge of the flange (54).
5. Device according to claim 1, characterized in that the ring (36) is divided into an internal section and an external section by a cylindrical joint (42) located approximately at the level of the internal surface of the kiln shell (16).
6. Device according to claim 1, characterized in that the ring is divided into an internal section (36') and an external section (44) and that the latter is made of prefabricated concrete blocks which are attached to the said support (48, 54).
7. Device according to any one of the preceding claims, characterized in that the ring (36) is provided with joints located in radial planes.
8. Device according to any one of the preceding claims, characterized in that the flange (54) is cooled by air blown onto its rear face and discharged through two passages (30, 32) with a ring-shaped cross-section arranged between the kiln shell (16) and two shells (22, 24) concentric to the latter.
EP79400952A 1978-12-07 1979-12-04 Protection device for the discharge end of a rotary-drum furnace Expired EP0012660B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79400952T ATE144T1 (en) 1978-12-07 1979-12-04 PROTECTION DEVICE FOR THE OUTLET END OF A ROTARY FURNACE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7834456 1978-12-07
FR7834456A FR2443654A1 (en) 1978-12-07 1978-12-07 DEVICE FOR PROTECTING THE MOUTH OF A ROTARY OVEN

Publications (3)

Publication Number Publication Date
EP0012660A1 EP0012660A1 (en) 1980-06-25
EP0012660B1 EP0012660B1 (en) 1981-08-05
EP0012660B2 true EP0012660B2 (en) 1984-11-21

Family

ID=9215787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79400952A Expired EP0012660B2 (en) 1978-12-07 1979-12-04 Protection device for the discharge end of a rotary-drum furnace

Country Status (7)

Country Link
US (1) US4295825A (en)
EP (1) EP0012660B2 (en)
JP (1) JPS5579984A (en)
AT (1) ATE144T1 (en)
DE (1) DE2960586D1 (en)
DK (1) DK151836C (en)
FR (1) FR2443654A1 (en)

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US8523563B1 (en) * 2008-01-07 2013-09-03 Anthony Nardella Kiln brick protective collar
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JP5457906B2 (en) * 2010-03-29 2014-04-02 株式会社神戸製鋼所 Hardware mounting structure at the exit end of the rotary kiln
JP5778474B2 (en) * 2011-03-23 2015-09-16 Jx日鉱日石金属株式会社 Cylindrical furnace inner wall structure and cylindrical furnace inner wall construction method
JP5668630B2 (en) * 2011-07-25 2015-02-12 住友金属鉱山株式会社 Rotary kiln outlet side structure
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JP6518200B2 (en) * 2016-02-02 2019-05-22 Ｊｘ金属株式会社 Construction method of refractory structure of rotary kiln furnace
USD889629S1 (en) 2019-04-24 2020-07-07 Anthony Nardella Kiln brick protective collar
USD910832S1 (en) 2019-04-24 2021-02-16 Anthony Nardella Kiln brick protective collar with tabs
USD910831S1 (en) 2019-04-24 2021-02-16 Anthony Nardella Kiln brick protective collar with adjustable tabs
USD892297S1 (en) 2019-04-24 2020-08-04 Anthony Nardella Kiln brick protective collar
USD889628S1 (en) 2019-04-24 2020-07-07 Anthony Nardella Kiln brick protective collar with adjustable tab
USD907190S1 (en) 2019-04-24 2021-01-05 Anthony Nardella Kiln brick protective collar with apertures
USD951425S1 (en) 2020-01-22 2022-05-10 Anthony Nardella Hinged kiln brick protective collar
US11466934B2 (en) 2020-01-22 2022-10-11 Anthony Nardella Hinged kiln brick protective collar
USD934408S1 (en) 2020-01-22 2021-10-26 Anthony Nardella Hinged kiln brick protective collar

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Also Published As

Publication number Publication date
FR2443654B1 (en) 1981-03-20
EP0012660A1 (en) 1980-06-25
DK151836C (en) 1988-06-27
DE2960586D1 (en) 1981-11-05
DK519679A (en) 1980-06-08
US4295825A (en) 1981-10-20
FR2443654A1 (en) 1980-07-04
DK151836B (en) 1988-01-04
EP0012660B1 (en) 1981-08-05
ATE144T1 (en) 1981-08-15
JPS6315515B2 (en) 1988-04-05
JPS5579984A (en) 1980-06-16

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