EP0119909B1 - Furnace with refractory walking beams - Google Patents

Furnace with refractory walking beams Download PDF

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Publication number
EP0119909B1
EP0119909B1 EP84400468A EP84400468A EP0119909B1 EP 0119909 B1 EP0119909 B1 EP 0119909B1 EP 84400468 A EP84400468 A EP 84400468A EP 84400468 A EP84400468 A EP 84400468A EP 0119909 B1 EP0119909 B1 EP 0119909B1
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EP
European Patent Office
Prior art keywords
products
recesses
beams
furnace
longitudinal
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
EP84400468A
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German (de)
French (fr)
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EP0119909A1 (en
Inventor
Michel Denis
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 Stein SA
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Stein Heurtey SA
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Publication date
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Publication of EP0119909A1 publication Critical patent/EP0119909A1/en
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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
    • F27B9/3011—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases arrangements for circulating gases transversally
    • 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
    • F27B9/201—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 walking beam 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
    • F27B9/14—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
    • F27B9/201—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 walking beam furnace
    • F27B9/202—Conveyor mechanisms therefor
    • F27B9/203—Conveyor mechanisms therefor having ramps
    • 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
    • F27D3/02—Skids or tracks for heavy objects
    • F27D3/022—Skids
    • F27D3/024—Details of skids, e.g. riders

Definitions

  • Ovens intended for continuous heating, before rolling of products such as billets or blooms are often with mobile beams.
  • a part of the sole is formed of fixed beams while the remaining part consists of mobile beams and has a circular or rectangular movement.
  • the products rest alternately on the fixed beams and on the mobile beams whose movement ensures the progression of these products.
  • the beams of these ovens can be hollow and cooled by water circulation. They can also be made of refractory material, which reduces the thermal consumption of the furnace, given the elimination of thermal losses from the cooled elements.
  • the products are heated mainly by the radiation from the furnace on their upper face and on their lateral faces.
  • Their lower face which is constantly in contact with the refractory hearth, is heated only by the thermal conduction coming from the other faces and, in most of the oven, is at a temperature lower than that of the rest of the product.
  • This temperature difference causes a difference in expansion of the upper and lower faces of the product, which causes it to bend in the vertical plane.
  • This bending is detrimental to the progression of the products on the floor; in fact, the bent products tend to tip over and then risk overlapping if the deflection of the bending is greater than the interval which separates two successive products.
  • the patent U. S. 1,400,367 describes an oven comprising a hearth provided with slots in which are engaged mobile beams separated by a fixed beam of width greater than that of the mobile beams.
  • the side walls of the slots open flues bringing the combustion gases; these circulate around the movable elements of the floor and prevent cold air from entering through the slits.
  • the combustion gases and the fumes exiting through slots which have a limited width cannot heat the underside of the products, therefore preventing their bending.
  • the side walls of the slots and those of the mobile side members are in contact with the fumes and dust they contain; this is a drawback given the relative movement of the walls of the slots and those of the side members.
  • the present invention relates to an oven with refractory beams, with higher heating, which on the contrary makes it possible to avoid practically any bending of the products.
  • This oven in which the fixed beams of the hearth have a width greater than that of the mobile beams and have recesses connected to the general smoke circuit, is characterized in that the recesses open onto the upper face of the beams being oriented in the direction longitudinal of these beams, and are framed by portions of the fixed beams of width less than that of said recesses or by the walls of the furnace, so that the fumes cross the bed of products overcoming them, pass under this bed by heating by radiation the underside of said products, and are then evacuated outside.
  • the recesses preferably have a decreasing depth in the direction of movement of the products. They thus have an increasing passage section with the direction of flow of the fumes, which compensates for their drop in temperature.
  • the recesses can have different depths, the depth of a recess being a function of its position relative to the longitudinal median plane of the furnace. Smoke flows are thus obtained under the products, therefore reheating the underside of these products, which depend on the place of said products relative to the axis of the oven. It is thus possible to compensate for an asymmetry in the heating of the oven.
  • the fixed longitudinal members may include longitudinal metal profiles capable of supporting the products and themselves supported by the lower frame of the oven.
  • the oven has a roof 1, side walls such as 2 and a front wall 3 and has a longitudinal median plane A-A. Its sole is formed of refractory fixed beams 4 separated by mobile refractory beams 5 whose width is less than that of the fixed beams. Burners, not shown, make it possible to circulate combustion gases against the current in the upper zone of the furnace, above the longitudinal members 4 and 5.
  • the fixed longitudinal members 4 are supported by metal profiles 6 known as “sole irons forming an integral part of the metallic framework of the furnace which is designated in the drawing generally by the reference 7.
  • the mobile longitudinal members 5 are on their side supported by crosspieces 8, which, together with the side members 9, constitute a movable frame.
  • This chassis is supported, by means of uprights 10, by a chassis 11 which rests on a frame 12 by means of rollers 13 and which a system of jacks, not shown, makes it possible to move longitudinally.
  • the frame 12 rests itself, by means of rollers 14 on fixed inclined planes 15 and can be moved longitudinally by a system of jacks also not shown.
  • the movable beams 5 are moved both longitudinally and vertically, while if the chassis 11 is moved, the movable beams 5 only move longitudinally.
  • the fixed rails 4 have recesses such as 17a and 17b whose depth decreases in the direction of progression of the products, that is to say in the direction of the arrow F in Figure 2.
  • the greatest depth of these recesses is therefore at the level of the oven.
  • the recess 17a located near the longitudinal median plane A-A has a shallower depth than the recess 17b.
  • the various recesses are connected to a manifold 18 by flues such as 19 which are supported by a frame 20 integral with the oven.
  • the fumes resulting from the combustion pass through the recesses 17a and 17b, therefore the bed of products to which they give up by convection part of their sensible heat. Then flowing under the bed, in the recesses, they radiate on the undersides of the products which are thus heated.
  • the depth of the recesses also varies as a function of their positions relative to the axis of the oven, it is possible to compensate for any asymmetry in the heating of the oven.
  • the underside of the products 16 is brought to practically the same temperature as their upper face and expands substantially by the same value.
  • the product hanger is eliminated or at least considerably reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Tunnel Furnaces (AREA)

Description

Les fours destinés au chauffage en continu, avant laminage de produits tels que des billettes ou des blooms sont souvent à longerons mobiles. Une partie de la sole est formée de longerons fixes alors que la partie restante est constituée de longerons mobiles et a un mouvement circulaire ou rectangulaire. Les produits reposent alternativement sur les longerons fixes et sur les longerons mobiles dont le mouvement assure la progression de ces produits.Ovens intended for continuous heating, before rolling of products such as billets or blooms are often with mobile beams. A part of the sole is formed of fixed beams while the remaining part consists of mobile beams and has a circular or rectangular movement. The products rest alternately on the fixed beams and on the mobile beams whose movement ensures the progression of these products.

Les longerons de ces fours peuvent être creux et refroidis par circulation d'eau. Ils peuvent également être en matière réfractaire, ce qui diminue la consommation thermique du four, étant donné la suppression des pertes thermiques des éléments refroidis.The beams of these ovens can be hollow and cooled by water circulation. They can also be made of refractory material, which reduces the thermal consumption of the furnace, given the elimination of thermal losses from the cooled elements.

Dans les fours à longerons réfractaires le chauffage des produits est assuré principalement par le rayonnement du four sur leur face supérieure et sur leurs faces latérales. Leur face inférieure qui est constamment en contact avec la sole réfractaire, n'est chauffée que par la conduction thermique provenant des autres faces et, dans la plus grande partie du four, se trouve à une température inférieure à celle du reste du produit.In refractory beam ovens, the products are heated mainly by the radiation from the furnace on their upper face and on their lateral faces. Their lower face which is constantly in contact with the refractory hearth, is heated only by the thermal conduction coming from the other faces and, in most of the oven, is at a temperature lower than that of the rest of the product.

Cette différence de température provoque une différence de dilatation des faces supérieure et inférieure du produit, ce qui entraîne un cintrage de celui-ci dans le plan vertical. Ce cintrage est préjudiciable à la progression des produits sur la sole ; en effet, les produits cintrés ont tendance à basculer et risquent alors de se chevaucher si la flèche du cintrage est supérieure à l'intervalle qui sépare deux produits successifs.This temperature difference causes a difference in expansion of the upper and lower faces of the product, which causes it to bend in the vertical plane. This bending is detrimental to the progression of the products on the floor; in fact, the bent products tend to tip over and then risk overlapping if the deflection of the bending is greater than the interval which separates two successive products.

Le brevet U. S. 1,400,367 décrit un four comportant une sole munie de fentes dans lesquelles sont engagés des longerons mobiles séparés par un longeron fixe de largeur supérieure à celle des longerons mobiles. Dans les parois latérales des fentes débouchent des carneaux amenant les gaz de combustion ; ceux-ci circulent autour des éléments mobiles de la sole et évitent les rentrées d'air froid par les fentes. Mais les gaz de combustion et les fumées sortant par des fentes qui ont une largeur limitée ne peuvent chauffer la face inférieure des produits, donc éviter leur cintrage. De plus, les parois latérales des fentes et celles des longerons mobiles sont au contact des fumées et des poussières qu'elles contiennent ; cela est un inconvénient étant donné le mouvement relatif des parois des fentes et de celles des longerons.The patent U. S. 1,400,367 describes an oven comprising a hearth provided with slots in which are engaged mobile beams separated by a fixed beam of width greater than that of the mobile beams. In the side walls of the slots open flues bringing the combustion gases; these circulate around the movable elements of the floor and prevent cold air from entering through the slits. However, the combustion gases and the fumes exiting through slots which have a limited width cannot heat the underside of the products, therefore preventing their bending. In addition, the side walls of the slots and those of the mobile side members are in contact with the fumes and dust they contain; this is a drawback given the relative movement of the walls of the slots and those of the side members.

La présente invention a pour objet un four à longerons réfractaires, à chauffage supérieur, qui permet au contraire d'éviter pratiquement tout cintrage des produits.The present invention relates to an oven with refractory beams, with higher heating, which on the contrary makes it possible to avoid practically any bending of the products.

Ce four dans lequel les longerons fixes de la sole ont une largeur supérieure à celle des longerons mobiles et comportent des évidements reliés au circuit général des fumées, est caractérisé en ce que les évidements débouchent sur la face supérieure des longerons en étant orientés dans la direction longitudinale de ces longerons, et sont encadrés par des portions des longerons fixes de largeur inférieure à celle desdits évidements ou bien par les parois du four, de sorte que les fumées traversent le lit de produits les surmontant, passent sous ce lit en chauffant par rayonnement la face inférieure desdits produits, et sont ensuite évacués à l'extérieur.This oven in which the fixed beams of the hearth have a width greater than that of the mobile beams and have recesses connected to the general smoke circuit, is characterized in that the recesses open onto the upper face of the beams being oriented in the direction longitudinal of these beams, and are framed by portions of the fixed beams of width less than that of said recesses or by the walls of the furnace, so that the fumes cross the bed of products overcoming them, pass under this bed by heating by radiation the underside of said products, and are then evacuated outside.

Lors de l'utilisation du four, les fumées en traversant le lit de produits, assurent le chauffage de la face inférieure des produits, qui se dilate ainsi pratiquement comme leur face supérieure.When using the oven, the fumes passing through the bed of products heat the underside of the products, which thus expands practically like their upper side.

Les évidements ont, de préférence, une profondeur décroissant dans le sens de déplacement des produits. Ils présentent ainsi une section de passage croissant avec le sens d'écoulement des fumées, ce qui compense leur baisse de température.The recesses preferably have a decreasing depth in the direction of movement of the products. They thus have an increasing passage section with the direction of flow of the fumes, which compensates for their drop in temperature.

Les évidements peuvent avoir des profondeurs différentes, la profondeur d'un évidement étant fonction de sa position par rapport au plan médian longitudinal du four. On obtient ainsi des débits de fumées sous les produits, donc un réchauffage de la face inférieure de ces produits, qui dépendent de la place desdits produits par rapport à l'axe du four. Il est ainsi possible de compenser une dissymétrie de chauffage du four.The recesses can have different depths, the depth of a recess being a function of its position relative to the longitudinal median plane of the furnace. Smoke flows are thus obtained under the products, therefore reheating the underside of these products, which depend on the place of said products relative to the axis of the oven. It is thus possible to compensate for an asymmetry in the heating of the oven.

Les longerons fixes peuvent comporter des profilés métalliques longitudinaux propres à supporter les produits et supportés eux-mêmes par l'armature inférieure du four.The fixed longitudinal members may include longitudinal metal profiles capable of supporting the products and themselves supported by the lower frame of the oven.

On a décrit ci-après, à titre d'exemple non limitatif, un mode de réalisation d'un four à longerons réfractaires perfectionné selon la présente invention, avec référence au dessin annexé dans lequel :

  • La Figure 1 est une vue en coupe transversale d'une moitié du four ;
  • La Figure 2 est une coupe longitudinale de la partie d'enfournement du four, selon II-II de la Figure 1.
An embodiment of an improved refractory beam oven according to the present invention has been described below, by way of non-limiting example, with reference to the appended drawing in which:
  • Figure 1 is a cross-sectional view of one half of the oven;
  • Figure 2 is a longitudinal section of the charging part of the oven, according to II-II of Figure 1.

Tel qu'il est représenté au dessin, le four comporte une voûte 1, des parois latérales telles que 2 et une paroi frontale 3 et présente un plan médian longitudinal A-A. Sa sole est formée de longerons fixes réfractaires 4 séparés par des longerons mobiles réfractaires 5 dont la largeur est inférieure à celle des longerons fixes. Des brûleurs non représentés permettent de faire circuler à contre-courant des gaz de combustion dans la zone supérieure du four, au-dessus des longerons 4 et 5.As shown in the drawing, the oven has a roof 1, side walls such as 2 and a front wall 3 and has a longitudinal median plane A-A. Its sole is formed of refractory fixed beams 4 separated by mobile refractory beams 5 whose width is less than that of the fixed beams. Burners, not shown, make it possible to circulate combustion gases against the current in the upper zone of the furnace, above the longitudinal members 4 and 5.

Les longerons fixes 4 sont supportés par des profilés métalliques 6 dits « fers sous sole faisant partie intégrante de l'ossature métallique du four qui est désignée au dessin d'une façon générale par la référence 7. Les longerons mobiles 5 sont de leur côté supportés par des traverses 8, qui, conjointement avec les longerons 9, constituent un châssis mobile. Ce châssis est supporté, par l'intermédiaire de montants 10, par un châssis 11 qui repose sur un châssis 12 par l'intermédiaire de rouleaux 13 et qu'un système de vérins, non représenté, permet de déplacer longitudinalement. Le châssis 12 repose lui-même, par l'intermédiaire de rouleaux 14 sur des plans inclinés fixes 15 et peut être déplacé longitudinalement par un système de vérins également non représenté. En déplaçant le châssis 12 on déplace les longerons mobiles 5 à la fois longitudinalement et verticalement alors que si on déplace le châssis 11, les longerons mobiles 5 ne se meuvent que longitudinalement. En déplaçant simultanément les châssis 11 et 12, on peut imprimer aux longerons mobiles 5 un mouvement circulaire ou rectangulaire qui assure la progression dans le sens de la flèche F des produits 16 reposant sur la sole du four.The fixed longitudinal members 4 are supported by metal profiles 6 known as “sole irons forming an integral part of the metallic framework of the furnace which is designated in the drawing generally by the reference 7. The mobile longitudinal members 5 are on their side supported by crosspieces 8, which, together with the side members 9, constitute a movable frame. This chassis is supported, by means of uprights 10, by a chassis 11 which rests on a frame 12 by means of rollers 13 and which a system of jacks, not shown, makes it possible to move longitudinally. The frame 12 rests itself, by means of rollers 14 on fixed inclined planes 15 and can be moved longitudinally by a system of jacks also not shown. By moving the chassis 12 the movable beams 5 are moved both longitudinally and vertically, while if the chassis 11 is moved, the movable beams 5 only move longitudinally. By simultaneously moving the chassis 11 and 12, it is possible to impart to the mobile longitudinal members 5 a circular or rectangular movement which ensures progression in the direction of the arrow F of the products 16 resting on the hearth of the oven.

Dans la première partie du four, du côté de l'enfournement, les longerons fixes 4 présentent des évidements tels que 17a et 17b dont la profondeur décroît dans le sens de progression des produits, c'est-à-dire dans le sens de la flèche F à la Figure 2. La plus grande profondeur de ces évidements se trouve donc au niveau de l'enfournement. Dans le mode de réalisation représenté au dessin, l'évidement 17a situé à proximité du plan médian longitudinal A-A a une profondeur plus faible que l'évidement 17b. Les divers évidements sont reliés à un collecteur 18 par des conduits de fumée tels que 19 qui sont supportés par une ossature 20 faisant corps avec le four.In the first part of the oven, on the side of the oven, the fixed rails 4 have recesses such as 17a and 17b whose depth decreases in the direction of progression of the products, that is to say in the direction of the arrow F in Figure 2. The greatest depth of these recesses is therefore at the level of the oven. In the embodiment shown in the drawing, the recess 17a located near the longitudinal median plane A-A has a shallower depth than the recess 17b. The various recesses are connected to a manifold 18 by flues such as 19 which are supported by a frame 20 integral with the oven.

Efant donné la présence des évidements 17a et 17b ménagés dans les longerons fixes, la section des bordures latérales de ces longerons qui supportent les produits 16, est faible et incompatible avec la pression exercée sur ces bordures. Pour remédier à cet inconvénient, des profilés métalliques 21, de section rectangulaire, sont disposés dans ces bordures, parallèlement à l'axe longitudinal du four. Ces profilés qui servent d'appui aux produits 16 entrant dans le four, reposent sur les fers sous sole 6 par l'intermédiaire de supports 22.Child given the presence of the recesses 17a and 17b formed in the fixed rails, the section of the lateral edges of these rails which support the products 16, is small and incompatible with the pressure exerted on these edges. To overcome this drawback, metal profiles 21, of rectangular section, are arranged in these edges, parallel to the longitudinal axis of the oven. These sections which serve to support the products 16 entering the oven, rest on the irons under the floor 6 by means of supports 22.

En fonctionnement, les fumées résultant de la combustion traversent les évidements 17a et 17b, donc le lit de produits auxquels elles cèdent par convection une partie de leur chaleur sensible. En s'écoulant ensuite sous le lit, dans les évidements, elles rayonnent sur les faces inférieures des produits qui sont ainsi chauffées.In operation, the fumes resulting from the combustion pass through the recesses 17a and 17b, therefore the bed of products to which they give up by convection part of their sensible heat. Then flowing under the bed, in the recesses, they radiate on the undersides of the products which are thus heated.

Comme la profondeur des évidements décroît dans le sens de progression des produits, on obtient une bonne répartition, suivant l'axe du four, des fumées ayant traversé le lit de produits. Par ailleurs, l'efficacité du rayonnement thermique sur la face inférieure des produits est maintenue du fait que la baisse de température des fumées, qui circulent à contre-courant, est compensée par un accroissement de leur épaisseur.As the depth of the recesses decreases in the direction of progression of the products, a good distribution is obtained, along the axis of the oven, of the fumes having passed through the bed of products. Furthermore, the efficiency of the thermal radiation on the underside of the products is maintained because the drop in temperature of the fumes, which flow against the current, is compensated by an increase in their thickness.

Comme la profondeur des évidements varie également en fonction de leurs positions par rapport à l'axe du four, on peut compenser une dissymétrie éventuelle dans le chauffage du four.As the depth of the recesses also varies as a function of their positions relative to the axis of the oven, it is possible to compensate for any asymmetry in the heating of the oven.

En définitive, la face inférieure des produits 16 est portée pratiquement à la même température que leur face supérieure et se dilate sensiblement de la même valeur. Le cintre des produits est éliminé ou tout au moins considérablement réduit.Ultimately, the underside of the products 16 is brought to practically the same temperature as their upper face and expands substantially by the same value. The product hanger is eliminated or at least considerably reduced.

Les produits reposent au droit des longerons fixes 4, sur les profilés 21. Ceux-ci peuvent, sans inconvénients, être métalliques étant donné la température peu élevée qui règne dans le four dans sa zone d'enfournement.The products rest in line with the fixed beams 4, on the sections 21. These can, without drawbacks, be metallic given the low temperature prevailing in the oven in its charging area.

Claims (4)

1. A top heating furnace with mobile longitudinal beams, in which the fixed longitudinal beams (4) of the hearth have a width greater than that of the mobile longitudinal beams (5) and include recesses (17a and 17b) connected to the general smoke circuit, characterized in that the recesses (17a and 17b) open into the upper face of the longitudinal beams (4) while being oriented in the longitudinal direction of these beams, and are surrounded by portions of the fixed longitudinal beams of a width less than that of said recesses or else by the walls of the furnace, so that the smoke passes through the bed of products thereover, pass under this bed while heating the lower face of said products by radiation and are then discharged to the outside.
2. The furnace according to claim 1, characterized in that the recesses (17a and 17b) have a depth decreasing in the direction of movement of the products.
3. The furnace according to claim 1 or 2, characterized in that the depth of the recess (17a) situated the closest to the longitudinal median plane A-A has a smaller depth than the recess (17b) further away from this plane.
4. Furnace according to one of claims 1 to 3, characterized in that the portions of the fixed longitudinal means (4) surrounding the recesses (17a and 17b) comprise longitudinal metal bars (21) adapted for supporting the products and themselves supported by the lower frame-work of the furnace.
EP84400468A 1983-03-11 1984-03-09 Furnace with refractory walking beams Expired EP0119909B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8304263 1983-03-11
FR8304263A FR2542433B1 (en) 1983-03-11 1983-03-11 REFRACTORY BEAM OVENS

Publications (2)

Publication Number Publication Date
EP0119909A1 EP0119909A1 (en) 1984-09-26
EP0119909B1 true EP0119909B1 (en) 1987-11-11

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EP84400468A Expired EP0119909B1 (en) 1983-03-11 1984-03-09 Furnace with refractory walking beams

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US (1) US4556385A (en)
EP (1) EP0119909B1 (en)
CA (1) CA1218844A (en)
DE (1) DE3467397D1 (en)
ES (1) ES286166Y (en)
FR (1) FR2542433B1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8601467A (en) * 1986-06-06 1988-01-04 Elten Nederland TRANSPORT DEVICE.
IT1248166B (en) * 1991-05-21 1995-01-05 Danieli Off Mecc REFRACTORY LONGHERONI OVEN WITH CENTRAL LOADING FOR HEATING AND ACCUMULATION OF HOT PRODUCTS.
DE4119709A1 (en) * 1991-06-14 1992-12-17 Maerz Ofenbau OVEN FOR HEAT TREATMENT OF PIECE OF GOODS
DE4119708A1 (en) * 1991-06-14 1992-12-17 Maerz Ofenbau SIMPLE STEPS FOR HEAT TREATMENT OF PIECE OF GOODS
US5370530A (en) * 1993-03-24 1994-12-06 Italimpianti Of America, Inc. Rolls for high temperature roller hearth furnaces
US5362230A (en) * 1993-03-24 1994-11-08 Italimpianti Of America, Inc. Rolls for high temperature roller hearth furnaces
US5334014A (en) * 1993-03-30 1994-08-02 Btu International Walking beam furnace

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1400367A (en) * 1919-09-10 1921-12-13 Harry P Mccann Furnace and method of conveying materials therethrough
US2325757A (en) * 1942-06-09 1943-08-03 Ehlers Edward Heating furnace
US3647194A (en) * 1970-06-01 1972-03-07 Bloom Eng Co Inc Protective refractory member
SE338580B (en) * 1970-11-04 1971-09-13 Tabougnar Ab
GB2009380B (en) * 1977-11-01 1982-03-31 Ce Refractories Ltd Frunaces and furnace components
DE2923540C3 (en) * 1979-06-09 1985-06-27 Karrena GmbH, 4000 Düsseldorf Pipe cladding for pipes in the combustion chambers of industrial furnaces
JPS58105468U (en) * 1982-01-13 1983-07-18 中外炉工業株式会社 Continuous heat treatment furnace for pipes with upsets

Also Published As

Publication number Publication date
FR2542433A1 (en) 1984-09-14
EP0119909A1 (en) 1984-09-26
US4556385A (en) 1985-12-03
CA1218844A (en) 1987-03-10
ES286166Y (en) 1986-06-01
FR2542433B1 (en) 1988-01-29
DE3467397D1 (en) 1987-12-17
ES286166U (en) 1985-11-01

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