EP0633439A1 - Cooled rolls for handling products, especially metallurgical and siderurchical products - Google Patents

Cooled rolls for handling products, especially metallurgical and siderurchical products Download PDF

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Publication number
EP0633439A1
EP0633439A1 EP94401450A EP94401450A EP0633439A1 EP 0633439 A1 EP0633439 A1 EP 0633439A1 EP 94401450 A EP94401450 A EP 94401450A EP 94401450 A EP94401450 A EP 94401450A EP 0633439 A1 EP0633439 A1 EP 0633439A1
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EP
European Patent Office
Prior art keywords
cooled
products
screens
rollers according
central shaft
Prior art date
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Withdrawn
Application number
EP94401450A
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German (de)
French (fr)
Inventor
Jean-Christophe Mitais
Philippe Buchet
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Fives Stein SA
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Stein Heurtey SA
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Publication date
Application filed by Stein Heurtey SA filed Critical Stein Heurtey SA
Priority to DE9421957U priority Critical patent/DE9421957U1/en
Publication of EP0633439A1 publication Critical patent/EP0633439A1/en
Withdrawn legal-status Critical Current

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    • 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
    • F27D3/026—Skids or tracks for heavy objects transport or conveyor rolls for furnaces; roller rails
    • 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
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0012—Rolls; Roll arrangements

Definitions

  • the present invention relates to improvements made to the rollers which are used in particular in heat treatment ovens for handling product, for example metallurgical and steel products, moving inside such ovens.
  • the means for ensuring the movement of the product for example metallurgical or steel, inside the furnace, are made so as to allow movement of this product at different speeds, slow or high , this in order to take into account industrial imperatives.
  • the lifetime of the handling and conveying means in the furnace must be sufficiently long with respect to the other mechanical systems used in the furnace, that is to say that the handling means must be able to maintain, over time, their initial level of performance.
  • the handling and conveying rollers must be designed and produced so as to ensure good guiding of the products throughout the oven and so that the thermal marking of the products by the rollers is as low as possible.
  • rollers In the installations of the roller type, the technique of conventional rollers made of centrifuged refractory steel is known. These rollers have the disadvantage of being at the limit of possible for temperatures greater than or equal to 1,100 ° C; this type of roller comprising a central water-cooled tube requiring a large installed heating power, as regards the oven, this in order to compensate for the heat losses resulting from the cooling of the tubes of the rollers.
  • the present holder has recently developed a system of cooled rollers which is described in particular in FR-A-2 632 286.
  • This system consists of making the handling rollers from a central shaft cooled for example by water, on which discs are mounted, separated using an insulating refractory, these discs arranged perpendicular to the longitudinal axis of the roller serving as a support for the products to be handled and conveyed.
  • the invention proposes to provide a new type of cooled roller which does not have the drawbacks mentioned above of roller handling systems according to the prior art.
  • the invention relates to cooled rollers for handling and conveying products, and in particular metallurgical and steel products, moving inside an oven, each of these rollers consisting of a central shaft cooled by water on which discs are mounted perpendicular to said central shaft, to serve as a support for the products, characterized in that there is, around said central shaft, one or more screens providing thermal insulation, opposing radiative heat transfers between the atmosphere of the oven and the cooled shaft of said roller.
  • said rollers providing thermal insulation may possibly be of cylindrical, conical, frustoconical shape, or of any other shape making it possible to avoid said radiative thermal transfers.
  • the heat shields are made sufficiently thin and conductive in order to be considered isothermal, thus ensuring a purely radiative insulation.
  • the thermal screens are produced so as to provide both radiative and conductive insulation, the nature and the thickness of said screens then being determined so as to allow the establishment of a gradient of significant temperature within them.
  • the flow exchanged between the atmosphere of the furnace and the cooled shaft 10 of the roller is minimized by one or more screens, which in this nonlimiting exemplary embodiment are produced in the form of cylindrical heat screens 14 , and arranged around the cooled shaft 10.
  • these heat shields 14 can have any other suitable shape such as for example conical, frustoconical, etc.
  • said screens can be made of a metal or alloy or any other material sufficiently resistant to impact.
  • the cooled rollers thus perfected according to the invention make it possible to obtain insulations which have good mechanical resistance to impacts with the products handled, combined with resistance over time which is considerably increased compared to the rollers according to the prior art. This increases the reliability of handling systems comprising such rollers, which reduces maintenance to a minimum.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

Cooled rolls for handling and conveying products, especially metallurgical and siderurgical products moving inside a furnace, each of these rolls consisting of a central shaft cooled by water, on which discs are mounted perpendicular to said central shaft, to serve as a support for the siderurgical products, characterised in that there are arranged, around said central shaft (10), one or more screens (14) which ensure thermal insulation, opposing heat transfer by radiation between the atmosphere of the furnace and the cooled shaft of said roll. <IMAGE>

Description

La présente invention est relative à des perfectionnements apportés aux rouleaux qui sont utilisés notamment dans les fours de traitement thermique pour la manutention de produit par exemple des produits métallurgiques et sidérurgiques, se déplaçant à l'intérieur de tels fours.The present invention relates to improvements made to the rollers which are used in particular in heat treatment ovens for handling product, for example metallurgical and steel products, moving inside such ovens.

On sait que lors du déplacement d'un produit, notamment métallurgique et sidérurgique à l'intérieur d'un four, ce produit doit être amené à un niveau de température déterminée, ce qui impose aux moyens de manutention et de convoyage du produit dans le four, d'être conçus et réalisés en fonction des conditions d'ambiance thermique définies pour le produit (température élevée en général) et également en fonction des caractéristiques du produit (notamment charge, nature, etc...).It is known that during the movement of a product, in particular metallurgical and steelmaking inside an oven, this product must be brought to a determined temperature level, which imposes on the means of handling and conveying of the product in the oven, to be designed and produced according to the thermal ambient conditions defined for the product (high temperature in general) and also according to the characteristics of the product (in particular load, nature, etc ...).

En outre, il est nécessaire que les moyens permettant d'assurer le déplacement du produit, par exemple métallurgique ou sidérurgique, à l'intérieur du four, soient réalisés de manière à permettre un déplacement de ce produit à des vitesses différentes, lentes ou élevées, ceci afin de tenir compte des impératifs industriels.In addition, it is necessary that the means for ensuring the movement of the product, for example metallurgical or steel, inside the furnace, are made so as to allow movement of this product at different speeds, slow or high , this in order to take into account industrial imperatives.

Enfin, la durée de vie des moyens de manutention et de convoyage dans le four doit être suffisamment importante vis à vis des autres systèmes mécaniques mis en oeuvre dans le four, c'est-à-dire que les moyens de manutention doivent pouvoir maintenir, dans le temps, leur niveau de performance initial.Finally, the lifetime of the handling and conveying means in the furnace must be sufficiently long with respect to the other mechanical systems used in the furnace, that is to say that the handling means must be able to maintain, over time, their initial level of performance.

Pour résoudre les problèmes ainsi posés et rappelés ci-dessus, la technique actuelle a développé deux solutions qui sont, soit adaptées aux produits lourds, mais qui n'autorisent pas de déplacement des produits à des vitesses élevées (ce type de solution est celui des longerons cavaleurs), soit dépourvues de limite sur le plan de la vitesse de déplacement des produits, mais dont les conceptions actuelles conviennent mal dans le cas de produits lourds (il s'agit des installations du type rouleaux).To solve the problems thus posed and recalled above, the current technique has developed two solutions which are either adapted to heavy products, but which do not allow displacement of the products at high speeds (this type of solution is that of straddle beams), or devoid of any limit in terms of the speed of movement of the products, but whose current designs are ill-suited in the case of heavy products (these are installations of the roller type).

Dans cette dernière solution, les rouleaux de manutention et de convoyage doivent être conçus et réalisés de manière à assurer un bon guidage des produits tout au long du four et de façon que le marquage thermique des produits par les rouleaux soit le plus faible possible.In the latter solution, the handling and conveying rollers must be designed and produced so as to ensure good guiding of the products throughout the oven and so that the thermal marking of the products by the rollers is as low as possible.

Parmi les installations du type rouleaux, on connaît la technique des rouleaux classiques réalisés en acier réfractaire centrifugé. Ces rouleaux présentent l'inconvénient d'être à la limite du possible pour des températures supérieures ou égales à 1.100°C; ce type de rouleau comprenant un tube central refroidi à l'eau exigeant une puissance de chauffage installée importante, en ce qui concerne le four, ceci afin de compenser les pertes calorifiques résultant du refroidissement des tubes des rouleaux.Among the installations of the roller type, the technique of conventional rollers made of centrifuged refractory steel is known. These rollers have the disadvantage of being at the limit of possible for temperatures greater than or equal to 1,100 ° C; this type of roller comprising a central water-cooled tube requiring a large installed heating power, as regards the oven, this in order to compensate for the heat losses resulting from the cooling of the tubes of the rollers.

Parmi les installations de ce type, on connaît également des systèmes de manutention et de convoyage à rouleaux céramiques. Un tel système présente l'inconvénient d'être fragile vis-à-vis des chocs mécaniques.Among the installations of this type, there are also known handling and conveying systems with ceramic rollers. Such a system has the disadvantage of being fragile vis-à-vis mechanical shock.

Enfin, un autre système connu consiste à prévoir un rouleau à double enveloppe. Cependant, ce système est de réalisation trop complexe.Finally, another known system consists in providing a double envelope roller. However, this system is too complex to implement.

La présente titulaire a récemment développé un système de rouleaux refroidis qui est décrit notamment dans FR-A-2 632 286.
Ce système consiste à réaliser les rouleaux de manutention à partir d'un arbre central refroidi par exemple par de l'eau, sur lequel sont montés des disques, séparés à l'aide d'un réfractaire isolant, ces disques disposés perpendiculairement à l'axe longitudinal du rouleau servant de support aux produits à manutentionner et à convoyer.The present holder has recently developed a system of cooled rollers which is described in particular in FR-A-2 632 286.
This system consists of making the handling rollers from a central shaft cooled for example by water, on which discs are mounted, separated using an insulating refractory, these discs arranged perpendicular to the longitudinal axis of the roller serving as a support for the products to be handled and conveyed.

Dans un tel système, l'isolation des rouleaux ainsi réalisés pose deux problèmes :

  • une faible tenue mécanique aux chocs ou accrochages avec les produits entraînant de nombreux incidents étant donné que la forme des produits est moins plane qu'on ne pouvait l'imaginer ;
  • compte-tenu des températures de fonctionnement imposées, les isolants habituels qui sont montés sur pièce mobile, se désagrègent rapidement aux températures d'emploi, du fait des accélérations et décélérations lors des déplacements des produits.
In such a system, the insulation of the rolls thus produced poses two problems:
  • poor mechanical resistance to impact or snagging with the products, leading to numerous incidents, given that the shape of the products is less planar than could be imagined;
  • taking into account the operating temperatures imposed, the usual insulators which are mounted on a moving part, quickly disintegrate at the operating temperatures, due to accelerations and decelerations during movement of the products.

Dans ces conditions, la durée de vie de cette isolation des rouleaux ne dépasse pas six mois, ce qui oblige l'exploitant, en le pénalisant, à prévoir une maintenance très fréquente, fastidieuse et coûteuse.Under these conditions, the life of this insulation of the rollers does not exceed six months, which requires the operator, by penalizing him, to provide for very frequent, tedious and costly maintenance.

En fait, dans ce type d'isolation des rouleaux, c'est la mauvaise conductivité thermique de l'isolant qui minimise le flux échangé entre l'ambiance du four et l'arbre refroidi du rouleau.In fact, in this type of insulation of the rollers, it is the poor thermal conductivity of the insulation which minimizes the flow exchanged between the atmosphere of the furnace and the cooled shaft of the roller.

L'invention se propose d'apporter un nouveau type de rouleau refroidi ne présentant pas les inconvénients rappelés ci-dessus des systèmes de manutention à rouleaux selon la technique antérieure.The invention proposes to provide a new type of cooled roller which does not have the drawbacks mentioned above of roller handling systems according to the prior art.

En conséquence , l'invention concerne des rouleaux refroidis pour la manutention et le convoyage de produits, et en particulier de produits métallurgiques et sidérurgiques, se déplaçant à l'intérieur d'un four, chacun de ces rouleaux étant constitué d'un arbre central refroidi par de l'eau sur lequel sont montés des disques perpendiculairement audit arbre central, pour servir de support aux produits, caractérisés en ce que l'on dispose, autour dudit arbre central, un ou plusieurs écrans assurant une isolation thermique, s'opposant aux transferts thermiques radiatifs entre l'atmosphère du four et l'arbre refroidi dudit rouleau.Consequently, the invention relates to cooled rollers for handling and conveying products, and in particular metallurgical and steel products, moving inside an oven, each of these rollers consisting of a central shaft cooled by water on which discs are mounted perpendicular to said central shaft, to serve as a support for the products, characterized in that there is, around said central shaft, one or more screens providing thermal insulation, opposing radiative heat transfers between the atmosphere of the oven and the cooled shaft of said roller.

Selon une caractéristique de l'invention, lesdits rouleaux assurant l'isolation thermique peuvent éventuellement être de forme cylindrique, conique, tronconnique, ou de toute autre forme permettant d'éviter lesdits transferts thermiques radiatifs.According to a characteristic of the invention, said rollers providing thermal insulation may possibly be of cylindrical, conical, frustoconical shape, or of any other shape making it possible to avoid said radiative thermal transfers.

Selon une caractéristique de l'invention, les écrans thermiques sont réalisés suffisamment minces et conducteurs afin de pouvoir être considérés isothermes, assurant ainsi une isolation purement radiative.According to a characteristic of the invention, the heat shields are made sufficiently thin and conductive in order to be considered isothermal, thus ensuring a purely radiative insulation.

Selon une autre caractéristique de l'invention, les écrans thermiques sont réalisés de manière à assurer à la fois une isolation radiative et conductive, la nature et l'épaisseur desdits écrans étant alors déterminées de manière à permettre l'établissement d'un gradient de température significatif en leur sein.According to another characteristic of the invention, the thermal screens are produced so as to provide both radiative and conductive insulation, the nature and the thickness of said screens then being determined so as to allow the establishment of a gradient of significant temperature within them.

D'autres caractéristiques et avantages de la présente invention ressortiront de la description faite ci-après en référence aux dessins annexés qui en illustrent un exemple de réalisation dépourvu de tout caractère limitatif.Other characteristics and advantages of the present invention will emerge from the description given below with reference to the appended drawings which illustrate an embodiment thereof devoid of any limiting character.

Sur les dessins :

  • La figure 1 est une vue schématique en coupe axiale d'un rouleau refroidi perfectionné selon la présente invention, et
  • La figure 2 est une vue schématique en perspective représentant le rouleau de la figure 1.
In the drawings:
  • FIG. 1 is a schematic view in axial section of an improved cooled roller according to the present invention, and
  • Figure 2 is a schematic perspective view showing the roller of Figure 1.

En se référant aux dessins, on voit que chaque rouleau du système de manutention et de convoyage des produits, par exemple métallurgiques et sidérurgiques à l'intérieur du four comporte un arbre tubulaire central 10 refroidi par exemple à l'eau, sur lequel sont répartis, selon des intervalles prédéterminés, des disques 12, disposés perpendiculairement à l'arbre central. Ces disques servent de support aux produits sidérurgiques.Referring to the drawings, it can be seen that each roller of the system for handling and conveying products, for example metallurgical and steel products inside the furnace comprises a central tubular shaft 10 cooled for example with water, on which are distributed. , according to predetermined intervals, discs 12, arranged perpendicular to the central shaft. These discs are used to support steel products.

Selon la présente invention, on minimise le flux échangé entre l'ambiance du four et l'arbre 10 refroidi du rouleau, par un ou plusieurs écrans, qui dans cet exemple de réalisation non limitatif sont réalisés sous la forme d'écrans thermiques cylindriques 14, et disposés autour de l'arbre refroidi 10.According to the present invention, the flow exchanged between the atmosphere of the furnace and the cooled shaft 10 of the roller is minimized by one or more screens, which in this nonlimiting exemplary embodiment are produced in the form of cylindrical heat screens 14 , and arranged around the cooled shaft 10.

Ainsi qu'on l'a déjà précisé, ces écrans thermiques 14 peuvent présenter toute autre forme appropriée telle que par exemple conique, tronconnique, etc.As already specified, these heat shields 14 can have any other suitable shape such as for example conical, frustoconical, etc.

Selon l'invention, lesdits écrans peuvent être réalisés en un métal ou alliage ou en tout autre matériau résistant suffisamment aux chocs.According to the invention, said screens can be made of a metal or alloy or any other material sufficiently resistant to impact.

On obtient ainsi une excellente isolation des rouleaux.Excellent insulation of the rollers is thus obtained.

Selon l'invention, on peut obtenir :

  • soit une isolation purement radiative, en réalisant les écrans 14 suffisamment minces et conducteurs de manière qu'ils puissent être considérés isothermes ;
  • soit une isolation à la fois radiative, obtenue de la manière spécifiée ci-dessus, et conductive, la nature et l'épaisseur des écrans 14 étant alors déterminées de manière à obtenir en leur sein l'établissement d'un gradient de température significatif. Dans ce cas, les écrans peuvent être constitués de plusieurs couches de matériaux différents: métaux, alliages, matériaux composites, structures en nids d'abeille, etc...
According to the invention, it is possible to obtain:
  • either a purely radiative insulation, by making the screens 14 sufficiently thin and conductive so that they can be considered isothermal;
  • or an insulation that is both radiative, obtained in the manner specified above, and conductive, the nature and the thickness of the screens 14 then being determined so as to obtain within them the establishment of a significant temperature gradient. In this case, the screens can be made up of several layers of different materials: metals, alloys, composite materials, honeycomb structures, etc.

Les rouleaux refroidis ainsi perfectionnés selon l'invention permettent d'obtenir des isolations qui présentent une bonne tenue mécanique vis-à-vis des chocs avec les produits manipulés, combinée à une tenue dans le temps qui est considérablement accrue par rapport aux rouleaux selon la technique antérieure. On augmente ainsi la fiabilité des systèmes de manutention comportant de tels rouleaux, ce qui permet d'en réduire la maintenance à un minimum.The cooled rollers thus perfected according to the invention make it possible to obtain insulations which have good mechanical resistance to impacts with the products handled, combined with resistance over time which is considerably increased compared to the rollers according to the prior art. This increases the reliability of handling systems comprising such rollers, which reduces maintenance to a minimum.

Il demeure bien entendu que la présente invention n'est pas limitée aux exemples de réalisation décrits et/ou représentés ici mais qu'elle en englobe toutes les variantes.It remains to be understood that the present invention is not limited to the embodiments described and / or shown here but that it encompasses all variants.

Claims (8)

1 - Rouleaux refroidis pour la manutention et le convoyage de produits, notamment de produits métallurgiques et sidérurgiques se déplaçant à l'intérieur d'un four, chacun de ces rouleaux étant constitué d'un arbre central refroidi par de l'eau sur lequel sont montés des disques perpendiculairement audit arbre central, pour servir de support aux produits sidérurgiques, caractérisés en ce que l'on dispose, autour dudit arbre central (10) , un ou plusieurs écrans (14) assurant une isolation thermique, s'opposant aux transferts thermiques radiatifs entre l'atmosphère du four et l'arbre refroidi dudit rouleau. 1 - Cooled rollers for handling and conveying products, in particular metallurgical and steel products moving inside an oven, each of these rollers consisting of a central shaft cooled by water on which are mounted discs perpendicular to said central shaft, to serve as a support for steel products, characterized in that there is, around said central shaft (10), one or more screens (14) providing thermal insulation, opposing transfers radiative heat between the atmosphere of the furnace and the cooled shaft of said roller. 2 - Rouleaux refroidis selon la revendication 1 caractérisé en ce que lesdits écrans sont de forme cylindrique, conique, ou tronconnique. 2 - Cooled rollers according to claim 1 characterized in that said screens are cylindrical, conical, or frustoconical. 3 - Rouleaux refroidis selon l'une des revendications 1 ou 2 caractérisés en ce que les écrans thermiques (14) sont réalisés suffisamment minces et conducteurs afin de pouvoir être considérés isothermes, assurant ainsi une isolation purement radiative. 3 - Cooled rollers according to one of claims 1 or 2 characterized in that the heat shields (14) are made sufficiently thin and conductive in order to be considered isothermal, thus ensuring a purely radiative insulation. 4 - Rouleaux refroidis selon l'une des revendications 1 ou 2 caractérisés en ce que les écrans thermiques (14) sont réalisés de manière à assurer à la fois une isolation radiative et conductive, la nature et l'épaisseur desdits écrans étant alors déterminées de façon à permettre l'établissement d'un gradient de température significatif en leur sein. 4 - Cooled rollers according to one of claims 1 or 2 characterized in that the heat shields (14) are made so as to provide both radiative and conductive insulation, the nature and thickness of said screens then being determined from so as to allow the establishment of a significant temperature gradient within them. 5 - Rouleaux refroidis selon l'une quelconque des revendications précédentes caractérisés en ce que lesdits écrans thermiques sont réalisés en métaux ou alliages. 5 - Cooled rollers according to any one of the preceding claims, characterized in that said heat shields are made of metals or alloys. 6 - Rouleaux refroidis selon l'une quelconque des revendications 1 à 4 caractérisés en ce que lesdits écrans thermiques sont réalisés en matériaux composites. 6 - Cooled rollers according to any one of claims 1 to 4 characterized in that said heat shields are made of composite materials. 7 - Rouleaux refroidis selon l'une quelconque des revendications 1 à 4 caractérisés en ce que lesdits écrans thermiques sont réalisés à l'aide de structures en nids d'abeilles. 7 - Cooled rollers according to any one of claims 1 to 4 characterized in that said heat shields are produced using honeycomb structures. 8 - Rouleaux refroidis selon les revendications 1 et 4 caractérisés en ce que lesdits écrans sont constitués de plusieurs couches de matériaux différents tels que notamment: métaux, alliages, matériaux composites, structures en nids d'abeilles. 8 - Cooled rollers according to claims 1 and 4 characterized in that said screens consist of several layers of different materials such as in particular: metals, alloys, composite materials, honeycomb structures.
EP94401450A 1993-07-09 1994-06-27 Cooled rolls for handling products, especially metallurgical and siderurchical products Withdrawn EP0633439A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE9421957U DE9421957U1 (en) 1993-07-09 1994-06-27 Improvements for cooled rolls for handling workpieces, especially metallurgical and ironworks workpieces

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9308508A FR2707272B1 (en) 1993-07-09 1993-07-09 Improvements brought to the cooled rollers for the handling of products in particular metallurgical and iron and steel.
FR9308508 1993-07-09

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Publication Number Publication Date
EP0633439A1 true EP0633439A1 (en) 1995-01-11

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US (1) US5431375A (en)
EP (1) EP0633439A1 (en)
JP (1) JPH07173525A (en)
CN (1) CN1041751C (en)
CA (1) CA2127343A1 (en)
DE (1) DE633439T1 (en)
ES (1) ES2069516T1 (en)
FR (1) FR2707272B1 (en)
IT (1) IT232437Y1 (en)
MY (1) MY111112A (en)

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CN102382971B (en) * 2010-08-31 2013-11-06 本田技研工业株式会社 Metal ring transporting rack and metal ring loading method
WO2019193895A1 (en) * 2018-04-02 2019-10-10 株式会社ノリタケカンパニーリミテド Conveyance roller for heating furnace

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DE2713741A1 (en) * 1977-03-29 1978-10-05 Thyssen Edelstahlwerke Ag Guide roller suitable for use in high temp. furnaces - where water cooled roller body has refractory sheath
FR2391442A1 (en) * 1977-05-20 1978-12-15 Koppers Wistra Ofenbau Gmbh ROLLER FOR ROLLER SUN OVEN
FR2498164A1 (en) * 1981-01-22 1982-07-23 Nippon Steel Corp TRANSPORT ROLL FOR TRANSPORTING HOT MATERIAL AND TRAIN OF SUCH TRANSPORT ROLLS
DE3740620C1 (en) * 1987-12-01 1988-06-23 Didier Eng Conveying roller for a roller hearth furnace
EP0345147A1 (en) * 1988-06-02 1989-12-06 Stein Heurtey Roll for handling siderurgical products transported inside a furnace

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IT232437Y1 (en) 2000-01-10
DE633439T1 (en) 1995-09-28
FR2707272B1 (en) 1995-09-15
FR2707272A1 (en) 1995-01-13
ES2069516T1 (en) 1995-05-16
JPH07173525A (en) 1995-07-11
CN1041751C (en) 1999-01-20
CN1102860A (en) 1995-05-24
ITMI980036U1 (en) 1995-01-09
US5431375A (en) 1995-07-11
CA2127343A1 (en) 1995-01-10
MY111112A (en) 1999-08-30

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