FR2544057A1 - Low height reheating furnace - Google Patents

Low height reheating furnace Download PDF

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Publication number
FR2544057A1
FR2544057A1 FR8405416A FR8405416A FR2544057A1 FR 2544057 A1 FR2544057 A1 FR 2544057A1 FR 8405416 A FR8405416 A FR 8405416A FR 8405416 A FR8405416 A FR 8405416A FR 2544057 A1 FR2544057 A1 FR 2544057A1
Authority
FR
France
Prior art keywords
oven
product
heated
reheating
furnace
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.)
Granted
Application number
FR8405416A
Other languages
French (fr)
Other versions
FR2544057B1 (en
Inventor
Edgar Hartkopf
Heinz Patalon
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.)
Didier Engineering GmbH
Original Assignee
Didier Engineering 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 Didier Engineering GmbH filed Critical Didier Engineering GmbH
Publication of FR2544057A1 publication Critical patent/FR2544057A1/en
Application granted granted Critical
Publication of FR2544057B1 publication Critical patent/FR2544057B1/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • 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
    • 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
    • F27B9/22—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 rails, e.g. under the action of scrapers or pushers
    • 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
    • F27B2009/305—Particular conformation of the furnace
    • F27B2009/3055—Non-uniform section through the length of the furnace
    • 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
    • F27B9/36—Arrangements of heating devices
    • F27B2009/3623—Heaters located under the track
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2001/00—Composition, conformation or state of the charge
    • F27M2001/15—Composition, conformation or state of the charge characterised by the form of the articles
    • F27M2001/1539—Metallic articles
    • F27M2001/1547—Elongated articles, e.g. beams, rails
    • F27M2001/1552—Billets, slabs

Abstract

The furnace has workpiece supports disposed along the furnace and has a roof positioned almost immediately above the workpieces, the furnace heat sources being mounted below the supports.

Description

Four pour le réchauffage de brames, lingots,
billettes ou autres produits à réchauffer analogues
L'invention se rapporte à un four pour le réchauffage de brames, lingots billettes ou autres produits à réchauffer analogues, comportant des dispositifs d'appui disposés tout au long du four, par exemple des longerons tubulaires, des soles ou analogues, sur lesquels le produit à réchauffer repose et est transporté à travers le four.Oven for reheating slabs, ingots,
billets or other similar products for reheating
The invention relates to an oven for reheating slabs, billet ingots or other similar products to be reheated, comprising support devices arranged throughout the oven, for example tubular beams, decks or the like, on which the product to be heated rests and is transported through the oven.

Pour le réchauffage de ces produits dans des fours où les produits sont transportés à travers le four sur des longerons tubulaires et des soles, le chauffage, en cas de transport sur soles n'est effectué que par le four supérieur, c'est-à-dire par la section du four se trouvant au-dessus des soles ou de leurs bancs, et, en cas de transport sur longerons tubulaires, que par les fours supérieur et inférieur sur les produits à réchauffer. For the reheating of these products in ovens where the products are transported through the furnace on tubular beams and hearths, the heating, in the case of transportation on hearths is carried out only by the upper furnace, i.e. - say by the section of the oven located above the hearths or their benches, and, in the case of transport on tubular beams, only by the upper and lower ovens on the products to be reheated.

Pour empêcher une surchauffe locale du produit à réchauffer et du garnissage réfractaire dans la zone des brûleurs du four supérieur, il est nécessaire que les chambres des fours aient des hauteurs d'environ 2000 mm. To prevent local overheating of the product to be heated and of the refractory lining in the burner area of the upper oven, it is necessary that the oven chambers have heights of about 2000 mm.

Pour les chambres des fours, des hauteurs libres de 3000 à 5000 mm (four supérieur plus four inférieur) sont par conséquent actuellement la regle pour de tels fours. Des chambres de chauffage aussi grandes nécessitent obligatoirement une depense considérable en matériau et en équipements auxiliaires. La grandeur de ces chambres de fours augmente, en outre, considérablement les pertes de chaleur (déperditions calorifiques de paroi et de flamme) et complique singulièrement le réglage de la pression du four. For oven chambers, free heights of 3000 to 5000 mm (upper oven plus lower oven) are therefore currently the rule for such ovens. Such large heating chambers necessarily require considerable expenditure of material and auxiliary equipment. The size of these furnace chambers also considerably increases the heat losses (heat loss from the wall and the flame) and makes the pressure regulation of the furnace particularly difficult.

L'invention a par conséquent pour objet d'utiliser la force ascensionnelle naturelle des gaz de fumée allant de l'espace inférieur à l'espace supérieur du four pour assurer un transfert thermique supplémentaire sur les surfaces latérales et supérieures du produit à réchauffer. The object of the invention is therefore to use the natural upward force of the smoke gases going from the lower space to the upper space of the furnace to provide additional heat transfer to the side and upper surfaces of the product to be heated.

Pour atteindre ce résultat, l'invention propose que le four de réchauffage au-dessus des dispositifs d'appui présente une hauteur interne suffisamment faible pour que le plafond du four se trouve à peu près immédiatement audessus du produit à réchauffer et que ce ne soit globalement que l'espace du four situé en-dessous des dispositifs d'appui qui comporte des sources de chaleur. To achieve this result, the invention proposes that the reheating furnace above the support devices has an internal height that is sufficiently low that the ceiling of the furnace is almost immediately above the product to be reheated and that it is not overall that the oven space located below the support devices which includes heat sources.

I1 peut certes s'avérer assez souvent avantageux de munir en plus l'espace supérieur du four dans la zone d'entrée du produit à réchauffer d'une source de chaleur placée au-dessus. Ce chauffage supplémentaire par le haut se limite seulement à la zone d'entrée et convient particulièrement bien pour les brames et les lingots afin d'obtenir un chauffage intensif dès le départ. It can certainly prove quite often advantageous to additionally provide the upper space of the oven in the inlet zone of the product to be heated with a heat source placed above. This additional heating from above is limited only to the entry area and is particularly suitable for slabs and ingots in order to obtain intensive heating from the start.

Si de sévères exigences sont imposées au produit fini de laminage1 par exemple d'étroites tolérances d'épaisseur, une sole fixe avec source de chauffage du côté supérieur est installée dans la zone de la sortie du four en vue d'uniformiser les températures du produit à réchauffer. If severe requirements are placed on the finished rolling product1, for example narrow thickness tolerances, a fixed hearth with heating source on the upper side is installed in the area of the outlet of the oven in order to standardize the temperatures of the product. to reheat.

L'invention sera mieux comprise à l'aide de la description de modes de réalisation pris comme exemples, mais non limitatifs, et illustrés par le dessin annexé, sur lequel:
- la figure 1 est une coupe longitudinale d'un four de réchauffage selon un premier exemple de réalisation,
- la figure 2 est une coupe transversale suivant
II-II de la figure 1,
- la figure 3 est une coupe longitudinale d'un four de réchauffage selon un deuxième exemple de réalisation,
- la figure 4 est une coupe longitudinale d'un four de réchauffage selon un troisième exemple de réalisation,
- la figure 5 est une coupe longitudinale d'un four de réchauffage selon un quatrième exemple de réalisation.The invention will be better understood with the aid of the description of embodiments taken as examples, but not limiting, and illustrated by the appended drawing, in which:
FIG. 1 is a longitudinal section of a reheating furnace according to a first exemplary embodiment,
- Figure 2 is a cross section along
II-II of Figure 1,
FIG. 3 is a longitudinal section of a reheating furnace according to a second exemplary embodiment,
FIG. 4 is a longitudinal section of a reheating furnace according to a third exemplary embodiment,
- Figure 5 is a longitudinal section of a heating furnace according to a fourth embodiment.

Le four de réchauffage selon les figures 1 et 2 est un four à longerons mobiles comportant des longerons tubulaires 10 refroidis à l'eau pour le produit à réchauffer 11. The reheating furnace according to FIGS. 1 and 2 is a furnace with movable beams comprising tubular beams 10 cooled by water for the product to be reheated 11.

Au-dessus des longerons tubulaires 10 dans l'espace supérieur 12 du four, dénommé four supérieur, il présente une hauteur interne relativement faible Le plafond 13 du four sur presque la totalité de sa longueur n'est disposé qu'à une faible distance au-dessus du produit à réchauffer 1l Par contre, l'espace L du?r 2 en-dessous des longerons tubulaires 10, dénommé four inférieur, est réalisé de façon classique et sur les deux parois latérales longitudinales du four sont installés des brûleurs latéraux 15. Les gaz de fumée chauds s'écoulent du four inférieur au four supérieur et sur leur trajet cèdent la plus grande partie de leur chaleur au produit à réchauffer et au revêtement réfractaire du four.Above the tubular beams 10 in the upper space 12 of the oven, called the upper oven, it has a relatively small internal height. The ceiling 13 of the oven over almost its entire length is disposed only a short distance from the above the product to be heated 1l On the other hand, the space L of the r 2 below the tubular beams 10, called the lower oven, is produced in a conventional manner and on the two longitudinal side walls of the oven are installed side burners 15 The hot smoke gases flow from the lower oven to the upper oven and on their way give up most of their heat to the product to be heated and to the refractory lining of the oven.

Un canal de sortie 16 assure l'évacuation du gaz à l'extrémité du four par laquelle pénètre le produit à réchauffer 11, de sorte que ce dernier se déplace dans le four en contre-courant du gaz. An outlet channel 16 ensures the evacuation of the gas at the end of the oven through which the product to be heated 11 enters, so that the latter moves in the oven in counter-current to the gas.

Le four de réchauffage selon la figure 3 correspond pour l'essentiel à celui des figures 1 et 2 à la différence près que l'espace supérieur 12 du four dans la zone d'entrée du produit à réchauffer 11 présente dans le plafond 13 un élargissement 17 en forme de bosse comportant deux rangées de brûleurs 18 Ce four de réchauffage avec espace supérieur chauffé dans la zone d'entrée convient en particulier pour le réchauffage des brames. The reheating furnace according to FIG. 3 corresponds essentially to that of FIGS. 1 and 2 with the difference that the upper space 12 of the furnace in the inlet zone of the product to be reheated 11 has a widening in the ceiling 13 17 in the form of a bump comprising two rows of burners 18 This reheating furnace with a heated upper space in the entry area is particularly suitable for reheating slabs.

Le four de réchauffage selon la figure 4 correspond pour l'essentiel à celui des figures 1 et 2, à la différence près que la zone de sortie sous forme de zone d'equilibrage 19 est équipée d'une sole fixe 20 et d'un chauffage supérieur 21 qui ne s'étend que sur la longueur de cette sole fixe 20. The reheating furnace according to FIG. 4 corresponds essentially to that of FIGS. 1 and 2, with the difference that the outlet zone in the form of balancing zone 19 is equipped with a fixed hearth 20 and a upper heating 21 which extends only over the length of this fixed hearth 20.

Le four de réchauffage selon la figure 5 correspond pour l'essentiel à celui des figures 1 et 2 à la différence près que l'espace inférieur du four 14 à la place des brûleurs latéraux 15 comporte quelques brûleurs frontaux 22 qui sont disposés dans desdites bosses 23 transversalement au sens longitudinal du four et sont dirigés à l'encontre du sens du déplacement du produit à réchauffer 11.  The reheating furnace according to FIG. 5 corresponds essentially to that of FIGS. 1 and 2 with the difference that the lower space of the furnace 14 in place of the side burners 15 includes a few front burners 22 which are arranged in said bumps 23 transversely to the longitudinal direction of the oven and are directed against the direction of movement of the product to be heated 11.

Claims (4)

REVENDICATIONS 1. Four pour le réchauffage de brames, lingots1 billettes ou autres produits à réchauff-er analogues, comportant des dispositifs d'appui disposés tout au long du four, par exemple des longerons tubulaires, des soles ou analogues, sur lesquels le produit à réchauffer repose et est transporte à travers le four, caractérisé par le fait que le four de réchauffage au-dessus des dispositifs d'appui (10) présente une hauteur interne suffisamment faible pour que le plafond (13) du four se trouve à peu près immédiatement au-dessus du produit à réchauffer (11), et que ce n'est globalement que l'espace (14) du four situé en dessous des dispositifs d'appui (10) qui comporte des sources de chaleur, par exemple des brûleurs (15,22). 1. Oven for reheating slabs, ingots1 billets or other similar products to be reheated, comprising support devices arranged throughout the furnace, for example tubular beams, decks or the like, on which the product to be reheated rests and is transported through the oven, characterized in that the reheating oven above the support devices (10) has an internal height that is sufficiently small that the ceiling (13) of the oven is located almost immediately above the product to be heated (11), and that it is generally only the space (14) of the oven situated below the support devices (10) which comprises heat sources, for example burners ( 15.22). 2. Four selon la revendication 1, caractérisé par le fait que l'espace inférieur (14) du four est équipé de brûleurs latéraux (15) disposés en rangées. 2. Oven according to claim 1, characterized in that the lower space (14) of the oven is equipped with side burners (15) arranged in rows. 3. Four selon la revendication 1 ou 2, caractérisé par le fait que l'espace supérieur (12) du four dans la zone d'entrée (17) du produit à réchauffer (11) - de préférence pour des brames - est en plus muni d'une source de chauffage (18) placée à la partie supérieure. 3. Oven according to claim 1 or 2, characterized in that the upper space (12) of the oven in the inlet zone (17) of the product to be heated (11) - preferably for slabs - is in addition provided with a heating source (18) placed at the top. 4. Four selon l'une quelconque des revendications précédentes, caractérisé par le fait que l'espace supérieur (12) du four dans une zone d'équilibrage (19) du côté sortie du produit à réchauffer est équipé en plus d'une source de chauffage (21) placée à la partie supérieure.  4. Oven according to any one of the preceding claims, characterized in that the upper space (12) of the oven in a balancing zone (19) on the outlet side of the product to be heated is additionally equipped with a source heater (21) placed at the top.
FR8405416A 1983-04-06 1984-04-05 OVEN FOR THE REHEATING OF SLABS, LINGOTS, BILLETS OR OTHER SIMILAR HEATING PRODUCTS Expired FR2544057B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3312337A DE3312337C2 (en) 1983-04-06 1983-04-06 Furnace for heating slabs, blocks, billets or similar items to be heated

Publications (2)

Publication Number Publication Date
FR2544057A1 true FR2544057A1 (en) 1984-10-12
FR2544057B1 FR2544057B1 (en) 1988-06-10

Family

ID=6195568

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8405416A Expired FR2544057B1 (en) 1983-04-06 1984-04-05 OVEN FOR THE REHEATING OF SLABS, LINGOTS, BILLETS OR OTHER SIMILAR HEATING PRODUCTS

Country Status (7)

Country Link
JP (1) JPS59193212A (en)
BE (1) BE899336A (en)
DE (1) DE3312337C2 (en)
ES (1) ES286680Y (en)
FR (1) FR2544057B1 (en)
IT (1) IT1173535B (en)
ZA (1) ZA842192B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107630954B (en) * 2017-10-20 2019-08-02 来安县隆华摩擦材料有限公司 A kind of brake block liner surface carbonization treatment apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2085103A (en) * 1934-04-19 1937-06-29 Lee Leif Furnace
US2927783A (en) * 1957-06-21 1960-03-08 Bloom Eng Co Inc Metal heating furnace system
US3100811A (en) * 1960-05-31 1963-08-13 Frederick S Bloom Metal heating furnace

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2301377A1 (en) * 1973-01-12 1974-07-18 Andreas Haessler PROCEDURE FOR COMPARISON OF TEMPERATURE, ESPECIALLY IN THE REHEATING ZONE OF A TUNNEL OVEN
JPS57192215A (en) * 1981-05-21 1982-11-26 Ishikawajima Harima Heavy Ind Co Ltd Metal-heating oven

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2085103A (en) * 1934-04-19 1937-06-29 Lee Leif Furnace
US2927783A (en) * 1957-06-21 1960-03-08 Bloom Eng Co Inc Metal heating furnace system
US3100811A (en) * 1960-05-31 1963-08-13 Frederick S Bloom Metal heating furnace

Also Published As

Publication number Publication date
IT8420320A0 (en) 1984-03-30
FR2544057B1 (en) 1988-06-10
ES286680Y (en) 1986-10-01
BE899336A (en) 1984-07-31
ZA842192B (en) 1985-02-27
DE3312337A1 (en) 1984-10-18
ES286680U (en) 1986-03-16
IT1173535B (en) 1987-06-24
JPS59193212A (en) 1984-11-01
DE3312337C2 (en) 1986-07-17

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