EP0434487A1 - Stocking device for metallurgical products, such as thin slabs - Google Patents

Stocking device for metallurgical products, such as thin slabs Download PDF

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Publication number
EP0434487A1
EP0434487A1 EP90403396A EP90403396A EP0434487A1 EP 0434487 A1 EP0434487 A1 EP 0434487A1 EP 90403396 A EP90403396 A EP 90403396A EP 90403396 A EP90403396 A EP 90403396A EP 0434487 A1 EP0434487 A1 EP 0434487A1
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EP
European Patent Office
Prior art keywords
products
storage
beams
continuous casting
roller
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.)
Withdrawn
Application number
EP90403396A
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German (de)
French (fr)
Inventor
Yves Braud
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
Original Assignee
Stein Heurtey SA
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Filing date
Publication date
Application filed by Stein Heurtey SA filed Critical Stein Heurtey SA
Publication of EP0434487A1 publication Critical patent/EP0434487A1/en
Withdrawn legal-status Critical Current

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
    • 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
    • F27B19/00—Combinations of furnaces of kinds not covered by a single preceding main group
    • F27B19/02—Combinations of furnaces of kinds not covered by a single preceding main group combined in one structure
    • 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
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/021—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces having two or more parallel tracks
    • 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
    • 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
    • F27B9/207—Conveyor mechanisms therefor consisting of two or more conveyors
    • 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
    • F27B9/24—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 being carried by a conveyor
    • F27B9/2407—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 being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988—Metal casting
    • Y10T29/49991—Combined with rolling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
    • Y10T29/5184—Casting and working

Definitions

  • the present invention relates to a device intended for ensuring the storage of metallurgical products, such as in particular thin slabs, obtained from parallel continuous casting lines and delivered to a rolling mill system.
  • the invention more particularly proposes to provide a device for storing such metallurgical products to be installed downstream of two parallel continuous casting lines operating simultaneously and upstream of a system for transferring the products obtained to ensure a continuous supply of '' a rolling mill using products from either and alternately from each continuous casting line.
  • FIG. 1 of the appended drawings shows in perspective and schematically an installation which comprises two continuous casting lines 10, 10 ′ allowing d '' obtain metallurgical products such as thin slabs B, B ′.
  • Two shears 12, 12 ′ ensure the cutting of each slab to the desired length and, the slab thus produced, such that B or B ′ is brought respectively into an oven 16, 16 ′ by displacement on a roller table respectively 14, 14 ′.
  • Each of the ovens 16, 16 ′ is arranged along the corresponding casting axis and it provides an ideal homogeneous temperature of the slab for the subsequent rolling operation. Inside each of the ovens the slabs move on a system of rollers or rollers driven in rotation.
  • a transfer machine designated as a whole by the reference 18 which makes it possible to feed a rolling mill 20 to using successive slabs such as B ⁇ coming alternately from each continuous casting line 10, 10 ′.
  • the mobile support beams are divided into two identical series arranged in parallel in two locations of the storage area and a single series of transport beams is provided, each beam of said series being positioned between two pairs of support beams at a location in the storage area to ensure the movement of products from either of the continuous casting lines in said storage area.
  • each of the transport beams is divided into two independent parts which makes it possible to create two independent storage zones, each zone being supplied with products from the corresponding roller table.
  • the invention also relates to an application of the device for the storage and transfer of thin products coming from two continuous casting lines parallel to a rolling line, characterized in that the products enter the storage enclosure on one of the tables with rollers of the latter and emerge from this enclosure via the other roller table, the products being transferred between said roller tables by means of movable beams, these products being able to be stored in the storage area located between the two roller tables.
  • the device according to the present invention essentially comprises an enclosure heated in which is provided with a storage zone intended to receive the metallurgical products such as the thin slabs B, B ′ coming continuously from the two continuous casting lines such as 10, 10 ′.
  • This storage enclosure according to the invention can be installed either on the inlet side of the two ovens such as 16, 16 ′ ( Figure 1) or on the outlet side of these two ovens, immediately before the transfer device 18 making it possible to supply the laminating installation 20.
  • the storage enclosure according to the invention can be installed in any intermediate position.
  • this storage enclosure is in the form of an oven 22 having a length at least equal to the length of the metallurgical products to be stored.
  • This storage oven 22 has inlets such as 24, 24 ′ ensuring the introduction into the enclosure of the oven of products such as thin slabs from the continuous casting lines and it also includes outlets for these products, these these to be transferred to a rolling facility.
  • Thin slabs are transported inside the storage oven using support and drive rollers such as 26, 26, the rotation of these rollers being able to be ensured from outside the oven storage via a cantilevered shaft as shown in Figure 2.
  • mobile beams such as 28, 28 ′ and 30 are provided. These mobile beams and their movement are designed so as to move products such as thin slabs B, B ′ Inside the storage enclosure 22, parallel to their axis, from the two rows which correspond to the axes of the continuous casting installations such as 10, 10 ′ and to deposit them for storage in a storage area which is provided between the two lines of roller tables 26, 26 ′.
  • the mobile longitudinal members 28, 28 ′ constitute product support longitudinal members and the mobile longitudinal members such as 30 constitute beams for transporting products.
  • These support and transport beams can move vertically with respect to the roller lines 26, 26 ′ so as to pass from a maximum elevation position, in which the upper surface of the beams is at a higher level relative to the roller lines 26, 26 ′ at a minimum elevation position in which the upper surface of these beams is at a lower level compared to the roller lines.
  • the transport beams such as 30 are located at a certain distance from the support beams 28, as can be seen in FIG. 3 and they can lift relative to these support beams while also being able to move horizontally in order to make advance products step by step.
  • each metallurgical product such as the thin slabs B, B ′ corresponding to each row is selectively gripped by the relative movement of the support beams 28, 28 ′ and the transport beams 30
  • the mobile transport and support beams ensure the movement of waiting products in the storage area located between the roller tables 26, 26 ′, towards the normal operating circuit.
  • a storage capacity is thus produced which allows continuous casting to continue in the event of even prolonged stoppage of the work of the rolling line.
  • FIG. 4 schematically represents the installation during its normal operation, the thin slabs B, B ′ running continuously on the roller tables 26, 26 ′ situated in the enclosure of the storage oven 22 along the casting axes keep on going.
  • the mobile support beams 28, 28 ′ and transport 30 are located at a level -1, the level 0 being that of the upper plane of the rollers of the tables 26, 26 ′.
  • the horizontal displacement of the product such as B ′ can be obtained at one time or by the repetition of several identical rectangular cycles so as to bring the product to be stored in any desired location of the storage area located between the two tables roller 26, 26 ′.
  • FIG. 6 illustrates the manner in which the storage of product B is carried out.
  • Product B ′ is placed on the housings 28, 28 ′ at altitude level +2 so as to allow the product B transfer cycle to be carried out freely, product B ′ being thus placed out of reach for the various elements who move product B to the storage area.
  • the side members 28 firstly place the product B in the plane of the rollers 26 at level 0 then the side members 30 perform one or more rectangular cycles so as to bring the product B to the storage position.
  • This storage cycle for product B takes place in the same way as the storage cycle for product B ′ described above with reference to FIG. 5.
  • FIG. 7 represents the storage operation of products B and B ′ on the mobile beams 28, 28 ′ and 30 at level -1.
  • the rollers 26, 26 ′ are free and they can directly transfer other products such as B1, B′1, along each of the axes of the roller tables.
  • Products B and B ′ remain in the storage area and the vertical movements of the mobile support beams 28, 28 ′ and of transport 30 make it possible to vary the point of support of the product and consequently to limit the hot deformation of these as well as the formation of black marks.
  • FIG. 8 represents the taking of a second product B′1 on the roller table 26 ′.
  • This cycle will take place in the manner described above: we begin by ensuring the release of products B and B1 at level +2 so as to put them out of the reach of the mobile elements which are used to move products B ′ And B′1 towards the storage area, then the support beams 28 ′ are moved by lifting up to level 0, then a horizontal displacement of the two products B ′ and B′1 is carried out using the transport beams 30 which perform one or more rectangular cycles as described above. Products B ′ and B′1 were thus brought to two successive locations in the storage area. It is of course possible to perform a similar operation on the other side of the installation, that is to say on the side of the roller table 26, in order to move the products B and B1 towards the storage area.
  • FIG. 9 shows an example of the maximum storage capacity of eight products.
  • the storage area comprises two products three times B, B1, B2 and B ′, B′1, B′2 respectively, coming respectively from each of the lines of continuous casting and two products B3, B′3 waiting on the roller tables 26, 26 ′ of the storage oven according to the present invention.
  • the configuration can be that illustrated in FIG. 7, according to which two products B, B ′ have been positioned in the storage area, up to the configuration illustrated in FIG. 9 in which there are six products present in the storage area.
  • the mode of implementation of the invention for ensuring the evacuation of the products using the roller tables 26, 26 ′ will be identical.
  • the evacuation of the products begins with the products which are present on the roller tables 26, 26 ′, these products following the usual transfer cycle.
  • a roller table located next to the storage area is free, the stored products are placed, corresponding to the other continuous casting line, out of the reach of the moving elements used to ensure the evacuation of a product on said roller table, using the movable beams 28, 28 ′ and 30 so as to bring the products to be insulated to the level +2, as shown for example in FIG. 8 (left part).
  • the cycle opposite to that described above is then carried out during storage, in order to move and deposit the product to be removed on the roller table. This cycle is carried out by a lifting movement obtained using the support beams such as 28, 28 ′ and by a rectangular movement of the transport beams 30.
  • the product thus removed from storage is evacuated in the normal circuit as indicated above. This operation can take place in the same way for each subsequent product, present in the storage area until completely emptying this area and resume normal production, that is to say passing the products directly through the storage oven on the roller tables 26, 26 ′ towards the corresponding evacuation outlets.
  • This variant differs essentially from the embodiment described above with reference to Figures 4 to 9, in that the mobile transport beams are distributed in pairs 30, 30 ′ between the support beams 28, 28 ′.
  • This configuration allows storage of products such as B, B ′ from one or the other of the roller tables 26, 26 ′ arranged along the axis of the two continuous casting lines, this storage being carried out completely independently for the two lines.
  • two independent storage zones S1 and S2 are obtained, respectively receiving the products to be stored such as B, B ′ which come from the respective roller tables 26, 26 ′. It is thus possible to store a product in one of the zones while a product is being loaded on the rollers corresponding to the other storage zone.
  • FIGS. 11 to 14 illustrate the storage of the products in the case of this variant, using diagrams which correspond to the diagrams in FIGS. 4 to 9.
  • FIG. 10 the starting phase is shown.
  • a product B is being scrolled on the roller table 26 and on the roller table 26 ′ is present a product B ′ which we now want to store in the storage area S2.
  • Figure 11 shows the first phase of this storage operation.
  • the mobile beams 28 and 30 which correspond to the storage area S1 of the products brought in by the roller table 26, are kept stationary so as not to hinder the movement of the product B which is routed in a normal manner the rollers of the table 26.
  • the support beams 28 lift up to level 0 in the upper plane of the rollers 26 ′, then the transport beams 30 ′ are moved according to one or more rectangular cycles in the manner already described below above with reference to FIGS. 4 to 9, so as to bring the product B ′ into the storage position in the storage area S2.
  • FIG. 12 now shows the loading of product B in the storage area S1.
  • the product B ′ remains stationary in its storage area S2, the side members 28 ′ and 30 ′ not being moved.
  • the operation of the roller table 26 ′ makes it possible to convey a product B′1 in a normal manner through the storage oven.
  • a vertical displacement of the support beams 28, followed by one or more rectangular cycles of the transport beams 30 make it possible to bring the product B to the storage position, in the zone S1, as illustrated by figure 12.
  • FIG. 13 represents the situation after the loading of products B and B ′ in their respective storage area S1 and S2, the roller tables 26, 26 ′ ensuring a direct routing of products B1 and B′1 through the storage oven .
  • Figure 14 is a diagram similar to Figure 9 illustrating an example of maximum configuration of a storage of eight products.
  • the storage area S1 comprises four products B, B1, B2, B3, one of which B3 is supported by the roller table 26 and, similarly the storage area S2 comprises four products B ′, B′1 , B′2, B′3 one of which B′3 is supported by the roller table 26 ′.
  • the storage area S1 comprises four products B, B1, B2, B3, one of which B3 is supported by the roller table 26 and, similarly the storage area S2 comprises four products B ′, B′1 , B′2, B′3 one of which B′3 is supported by the roller table 26 ′.
  • the evacuation of the products stored in the zones S1, S2 is carried out in an identical manner to that described above with reference to FIGS. 4 to 9, but independently for each zone thanks to the two independent series of beams transport mobiles 30, 30 ′.
  • the device which is the subject of the present invention can be installed at the outlet of the two ovens 16, 16 ′ (FIG. 1) so as to ensure the storage function of these products in the event of a problem on the rolling line 20, but it can also be implemented so as to ensure the transfer of the products from the two continuous casting lines to the rolling line.
  • This variant implementation of the invention is shown diagrammatically in FIG. 15.
  • the two continuous casting lines 10, 10 ′ respectively supply ovens 16, 16 ′ at the outlet of which the furnace is arranged. storage and transfer according to the invention designated by the reference F and which feeds a rolling line designated as a whole by the reference L.
  • FIGS. 16 to 19 illustrate the mode of operation of this variant according to the invention.
  • the means which ensure the movement of the products to the storage area from the roller tables 26, 26 ′ are identical to those described above with reference to Figures 1 to 9, that is to say that 'They consist of mobile support beams 28, 28 ′ and transport beams 30 which can move in a rectangular movement.
  • Figure 16 illustrates the initial situation.
  • a product B ′ coming from the continuous casting line 10 ′ and from the furnace 16 ′ is being evacuated on the rollers of the roller table 26 ′ towards the rolling line L located along its axis.
  • the rollers of the roller table 26 can load another product B.
  • FIG. 17 illustrates the phase of transfer of product B to the rolling line.
  • the rollers of the roller table 26 ′ are free and the displacement of the movable beams 28, 28 ′ and 30 makes it possible to grab the product B on the rollers of the roller table 26 and to place it at the start of the storage area.
  • the repetition of several rectangular cycles of the transport beams 30, in the same manner as described above makes it possible to move the product B to bring it to the end of the storage area opposite the roller table 26.
  • the product B was finally brought to position B1, immediately near the roller table 26 'remained free.
  • the product B is deposited on the rollers of the roller table 26 ′ by virtue of the movement of the side members 28 ′ and 30 so that it can then be evacuated towards the rolling line L.
  • FIG. 19 represents this possibility of storage and it illustrates an example of maximum storage capacity of eight products, according to a configuration similar to those illustrated by FIGS. 9 and 14. In this configuration, there are twice three products respectively B, B1 , B2 and B ′, B′1, B′2 in the storage area and two products respectively B3, B′3 on the roller tables 26, 26 ′.
  • the destocking is carried out in a similar manner to that described above, that is to say that this operation begins with the product B′3 located on the roller table 26 ′, this product being discharged directly to the rolling line L then the following successive products B′2, B′1, B ′, B, B1, B2, B3 are successively removed by the roller table 26 ′ onto which they are brought one after the other by rectangular cycles of movement of the transport beams 30.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Warehouses Or Storage Devices (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)

Abstract

Stocking device for metallurgical products, such as thin slabs, comprising: … …  - a heated stocking chamber (22) having a length which is at least equal to the length of the products to be stocked (B, B') and comprising opposite entries and exits for the products coming from the continuous-casting lines and delivered to the rolling line, these products moving in the said chamber on roller tables (26, 26') arranged, respectively, in line with the axes of the continuous-casting lines; and …  - a stocking zone in the said chamber, located between the two roller tables and comprising movable longitudinal members, namely longitudinal support members (28, 28'), for the products, capable of moving vertically between several levels, and longitudinal transportation members (30), located at a certain distance from the longitudinal support members and capable of moving vertically and horizontally in order to advance the products step by step in a series of successive rectangular movements, the said longitudinal members being installed successively between two rollers of each roller table (26, 26') so that the product to be stocked corresponding to each continuous-casting line may be successively seized and moved parallel to its axis by the said movable longitudinal members in order to be deposited for stocking between the two rows of roller tables. … …<IMAGE>…

Description

La présente invention concerne un dispositif destiné à assurer le stockage de produits métallurgiques, tels que notamment des brames minces, obtenus à partir de lignes parallèles de coulée continue et délivrés à un système de laminoir. L'invention se propose plus particulièrement d'apporter un dispositif de stockage de tels produits métallurgiques devant être installé en aval de deux lignes parallèles de coulée continue fonctionnant simultanément et en amont d'un système de transfert des produits obtenus pour assurer une alimentation continue d'un laminoir à l'aide des produits provenant indifféremment et alternativement de chaque ligne de coulée continue.The present invention relates to a device intended for ensuring the storage of metallurgical products, such as in particular thin slabs, obtained from parallel continuous casting lines and delivered to a rolling mill system. The invention more particularly proposes to provide a device for storing such metallurgical products to be installed downstream of two parallel continuous casting lines operating simultaneously and upstream of a system for transferring the products obtained to ensure a continuous supply of '' a rolling mill using products from either and alternately from each continuous casting line.

Pour mieux faire comprendre le domaine technique auquel s'applique la présente invention on se référera en premier lieu à la figure 1 des dessins annexés qui représente en perspective et de façon schématique une installation qui comporte deux lignes de coulée continue 10, 10′ permettant d'obtenir des produits métallurgiques tels que des brames minces B, B′. Deux cisailles 12, 12′ assurent la coupe de chaque brame à la longueur voulue et, la brame ainsi produite, telle que B ou B′ est amenée respectivement dans un four 16, 16′ par déplacement sur une table à rouleaux respectivement 14, 14′. Chacun des fours 16, 16′ est disposé selon l'axe de coulée correspondant et il assure une température homogène idéale de la brame pour l'opération ultérieure de laminage. A l'intérieur de chacun des fours les brames se déplacent sur un système de rouleaux ou de galets entraînés en rotation. A la sortie des fours 16, 16′ on prévoit une machine de transfert désignée dans son ensemble par la référence 18 qui permet d'alimenter un laminoir 20 à l'aide des brames successives telles que B˝ provenant alternativement de chaque ligne de coulée continue 10, 10′.To better understand the technical field to which the present invention applies, reference will first be made to FIG. 1 of the appended drawings which shows in perspective and schematically an installation which comprises two continuous casting lines 10, 10 ′ allowing d '' obtain metallurgical products such as thin slabs B, B ′. Two shears 12, 12 ′ ensure the cutting of each slab to the desired length and, the slab thus produced, such that B or B ′ is brought respectively into an oven 16, 16 ′ by displacement on a roller table respectively 14, 14 ′. Each of the ovens 16, 16 ′ is arranged along the corresponding casting axis and it provides an ideal homogeneous temperature of the slab for the subsequent rolling operation. Inside each of the ovens the slabs move on a system of rollers or rollers driven in rotation. At the outlet of the ovens 16, 16 ′ there is provided a transfer machine designated as a whole by the reference 18 which makes it possible to feed a rolling mill 20 to using successive slabs such as B˝ coming alternately from each continuous casting line 10, 10 ′.

On sait que la coulée continue ne peut être ni ralentie ni interrompue sans nuire à la qualité des produits qu'elle permet d'obtenir. Etant donné que l'alimentation des fours tels que 16, 16′ est ainsi continue, l'évacuation des produits métallurgiques, tels que les brames minces 16, 16′, à partir de ces fours, doit donc être assurée également de façon continue afin de permettre un fonctionnement optimal de toute l'installation. Or, l'évacuation continue des produits à partir des fours tels que 16, 16′ ne peut être garantie dans tous les cas, en particulier lors des arrêts de l'installation de laminage telle que 20, pour son entretien ou lors de pannes. Il est donc nécessaire de prévoir des moyens permettant d'assurer le stockage des produits qui correspondent à la production des deux lignes de coulée continue 10, 10′, durant la période de l'arrêt du fonctionnement de l'installation de laminage 20. C'est là le but du dispositif objet de la présente invention.We know that continuous casting cannot be slowed down or interrupted without compromising the quality of the products it produces. Since the supply of ovens such as 16, 16 ′ is thus continuous, the discharge of metallurgical products, such as thin slabs 16, 16 ′, from these ovens must therefore also be ensured in order to to allow optimal operation of the entire installation. However, the continuous evacuation of products from ovens such as 16, 16 ′ cannot be guaranteed in all cases, in particular during shutdowns of the rolling installation such as 20, for its maintenance or during breakdowns. It is therefore necessary to provide means making it possible to ensure the storage of the products which correspond to the production of the two continuous casting lines 10, 10 ′, during the period of stopping the operation of the laminating installation 20. C is the purpose of the device object of the present invention.

En conséquence, cette invention concerne un dispositif permettant d'assurer le stockage de produits métallurgiques, tels que notamment des brames minces, conçu particulièrement pour être installé en aval de deux lignes parallèles de coulée continue fonctionnant simultanément et en amont d'un système de transfert des produits obtenus afin d'assurer une alimentation continue d'un laminoir à l'aide des produits provenant alternativement et indifféremment de chaque ligne de coulée continue, ce dispositif étant caractérisé en ce qu'il comprend:

  • - une enceinte de stockage, chauffée, de longueur au moins égale à la longueur des produits à stocker et comportant des orifices d'entrée et de sortie opposés pour les produits provenant des lignes de coulée continue, ceux-ci se déplaçant dans ladite enceinte de stockage sur des tables à rouleaux, ou équivalents, situées respectivement selon les axes des lignes de coulée continue;
  • - une zone de stockage dans ladite enceinte, située entre les deux tables à rouleaux et comprenant des longerons mobiles: respectivement des longerons de support des produits pouvant se déplacer verticalement entre plusieurs niveaux et des longerons de transport situés à une certaine distance des longerons de support et pouvant se déplacer verticalement et horizontalement de manière à faire avancer pas-à-pas les produits à l'intérieur de la zone de stockage selon un mouvement rectangulaire, lesdits longerons mobiles étant implantés successivement entre deux rouleaux de chaque table à rouleaux de manière que le produit à stocker correspondant à chaque ligne de coulée continue soit saisi et déplacé de façon sélective parallèlement à son axe, par lesdits longerons mobiles, pour être déposé pour stockage entre les deux rangées de tables à rouleaux.
Consequently, this invention relates to a device for ensuring the storage of metallurgical products, such as in particular thin slabs, designed particularly to be installed downstream of two parallel continuous casting lines operating simultaneously and upstream of a transfer system. products obtained in order to ensure a continuous supply to a rolling mill using products coming alternately and indifferently from each continuous casting line, this device being characterized in that it comprises:
  • a storage enclosure, heated, of length at least equal to the length of the products to be stored and comprising opposite inlet and outlet orifices for the products coming from the continuous casting lines, these moving in said enclosure storage on roller tables, or the like, located respectively along the axes of the continuous casting lines;
  • - a storage area in said enclosure, located between the two roller tables and comprising movable beams: respectively product support beams which can move vertically between several levels and transport beams located at a certain distance from the support beams and being able to move vertically and horizontally so as to advance the products step by step inside the storage area in a rectangular movement, said mobile beams being successively installed between two rollers of each roller table so that the product to be stored corresponding to each continuous casting line is grasped and moved selectively parallel to its axis, by said movable beams, to be deposited for storage between the two rows of roller tables.

Selon un mode de réalisation préféré de la présente invention, les longerons mobiles de support sont répartis en deux séries identiques disposées parallèlement dans deux emplacements de la zone de stockage et on prévoit une série unique de longerons de transport, chaque longeron de ladite série étant positionné entre deux paires de longerons de support d'un emplacement de la zone de stockage pour assurer indifféremment le déplacement des produits provenant de l'une ou l'autre des lignes de coulée continue dans ladite zone de stockage.According to a preferred embodiment of the present invention, the mobile support beams are divided into two identical series arranged in parallel in two locations of the storage area and a single series of transport beams is provided, each beam of said series being positioned between two pairs of support beams at a location in the storage area to ensure the movement of products from either of the continuous casting lines in said storage area.

Selon une variante de la présente invention permettant d'assurer une évacuation indépendante des produits stockés sur chaque rangée de tables à rouleaux respectives chacun des longerons de transport est divisé en deux parties indépendantes ce qui permet de créer deux zones de stockage indépendantes, chaque zone étant alimentée en produits à partir de la table à rouleaux correspondante.According to a variant of the present invention for ensuring an independent evacuation of the products stored on each row of respective roller tables, each of the transport beams is divided into two independent parts which makes it possible to create two independent storage zones, each zone being supplied with products from the corresponding roller table.

L'invention concerne également une application du dispositif au stockage et au transfert de produits minces provenant de deux lignes de coulée continue parallèles à une ligne de laminage, caractérisée en ce que les produits pénètrent dans l'enceinte de stockage sur l'une des tables à rouleaux de cette dernière et ressortent de cette enceinte par l'intermédiaire de l'autre table à rouleaux, les produits étant tranférés entre lesdites tables à rouleaux au moyen des longerons mobiles, ces produits pouvant être stockés dans la zone de stockage située entre les deux tables à rouleaux.The invention also relates to an application of the device for the storage and transfer of thin products coming from two continuous casting lines parallel to a rolling line, characterized in that the products enter the storage enclosure on one of the tables with rollers of the latter and emerge from this enclosure via the other roller table, the products being transferred between said roller tables by means of movable beams, these products being able to be stored in the storage area located between the two roller tables.

D'autres caractéristiques et avantages de la présente invention ressortiront de la description faite ci-après en référence aux dessins annexés qui en illustrent des exemples de réalisation et de mise en oeuvre dépourvus de tout caractère limitatif. Sur les dessins:

  • - la figure 1 est une vue schématique et en perspective illustrant une installation décrite ci-dessus à laquelle peut être appliqué le dispositif objet de l'invention;
  • - la figure 2 est une vue schématique en coupe transversale de l'enceinte de stockage objet de la présente invention;
  • - la figure 3 est une coupe longitudinale de la figure 2.
  • - les figures 4 à 9 sont des vues schématiques correspondant à la figure 2 et destinées à expliquer le fonctionnement du dispositif objet de la présente invention selon un premier mode de mise en oeuvre;
  • - les figures 10 à 14 sont des vues schématiques, similaires aux figures 4 à 9 illustrant une variante de réalisation du dispositif selon l'invention;
  • - la figure 15 est une vue schématique en plan illustrant une seconde variante de réalisation de l'installation objet de la présente invention et;
  • - les figures 16 à 19 sont également des vues schématiques, similaires aux figures 4 à 9 et illustrant le mode de mise en oeuvre de cette seconde variante du dispositif objet de la présente invention.
Other characteristics and advantages of the present invention will emerge from the description given below with reference to the appended drawings which illustrate examples of embodiment and implementation thereof which are devoid of any limiting character. In the drawings:
  • - Figure 1 is a schematic perspective view illustrating an installation described above to which the device object of the invention can be applied;
  • - Figure 2 is a schematic cross-sectional view of the storage enclosure object of the present invention;
  • - Figure 3 is a longitudinal section of Figure 2.
  • - Figures 4 to 9 are schematic views corresponding to Figure 2 and intended to explain the operation of the device object of the present invention according to a first embodiment;
  • - Figures 10 to 14 are schematic views, similar to Figures 4 to 9 illustrating an alternative embodiment of the device according to the invention;
  • - Figure 15 is a schematic plan view illustrating a second alternative embodiment of the installation object of the present invention and;
  • - Figures 16 to 19 are also schematic views, similar to Figures 4 to 9 and illustrating the mode of implementation of this second variant of the device object of the present invention.

Ainsi qu'on l'a déjà précisé ci-dessus, le dispositif selon la présente invention comporte essentiellement une enceinte chauffée dans laquelle est ménagée une zone de stockage destinée à recevoir les produits métallurgiques tels que les brames minces B, B′ provenant en continu des deux lignes de coulée continue telles que 10, 10′. Cette enceinte de stockage selon l'invention peut être implantée soit du côté entrée des deux fours tels que 16, 16′ (figure 1) soit du côté sortie de ces deux fours, immédiatement avant le dispositif de transfert 18 permettant d'alimenter l'installation de laminage 20. Bien entendu, l'enceinte de stockage selon l'invention peut être implantée dans n'importe quelle position intermédiaire.As already specified above, the device according to the present invention essentially comprises an enclosure heated in which is provided with a storage zone intended to receive the metallurgical products such as the thin slabs B, B ′ coming continuously from the two continuous casting lines such as 10, 10 ′. This storage enclosure according to the invention can be installed either on the inlet side of the two ovens such as 16, 16 ′ (Figure 1) or on the outlet side of these two ovens, immediately before the transfer device 18 making it possible to supply the laminating installation 20. Of course, the storage enclosure according to the invention can be installed in any intermediate position.

Selon la présente invention, cette enceinte de stockage se présente sous la forme d'un four 22 présentant une longueur au moins égale à la longueur des produits métallurgiques devant être stockés. Ce four de stockage 22 comporte des entrées telles que 24, 24′ assurant l'introduction dans l'enceinte du four des produits tels que brames minces provenant des lignes de coulée continue et il comporte également des orifices de sorties de ces produits, ceux-ci devant être transférés à une installation de laminage.According to the present invention, this storage enclosure is in the form of an oven 22 having a length at least equal to the length of the metallurgical products to be stored. This storage oven 22 has inlets such as 24, 24 ′ ensuring the introduction into the enclosure of the oven of products such as thin slabs from the continuous casting lines and it also includes outlets for these products, these these to be transferred to a rolling facility.

Le transport des brames minces à l'intérieur du four de stockage est assuré à l'aide de rouleaux de supportage et d'entrainement tels que 26, 26, l'entraînement en rotation de ces rouleaux pouvant être assuré de l'extérieur du four de stockage par l'intermédiaire d'un arbre en porte-à-faux comme représenté sur la figure 2.Thin slabs are transported inside the storage oven using support and drive rollers such as 26, 26, the rotation of these rollers being able to be ensured from outside the oven storage via a cantilevered shaft as shown in Figure 2.

A chaque pas, entre deux rouleaux tels que 26 ou 26′, on prévoit des longerons mobiles tels que 28, 28′ et 30. Ces longerons mobiles et leur déplacement sont conçus de manière à déplacer les produits tels que les brames minces B, B′ à l'intérieur de l'enceinte de stockage 22, parallèlement à leur axe, à partir des deux files qui correspondent aux axes des installations de coulée continue telles que 10, 10′ et à les déposer pour stockage dans une zone de stockage qui est prévue entre les deux lignes de tables à rouleaux 26, 26′.At each step, between two rollers such as 26 or 26 ′, mobile beams such as 28, 28 ′ and 30 are provided. These mobile beams and their movement are designed so as to move products such as thin slabs B, B ′ Inside the storage enclosure 22, parallel to their axis, from the two rows which correspond to the axes of the continuous casting installations such as 10, 10 ′ and to deposit them for storage in a storage area which is provided between the two lines of roller tables 26, 26 ′.

Les longerons mobiles 28, 28′ constituent des longerons de support des produits et les longerons mobiles tels que 30 constituent des longerons de transport des produits. Ces longerons de support et de transport peuvent se déplacer dans le sens vertical par rapport aux lignes de rouleaux 26, 26′ de manière à passer d'une position d'élévation maximale, dans laquelle la surface supérieure des longerons se trouve à un niveau supérieur par rapport aux lignes de rouleaux 26, 26′ à une position d'élévation minimale dans laquelle la surface supérieure de ces longerons se trouve à un niveau inférieur par rapport aux lignes de rouleaux.The mobile longitudinal members 28, 28 ′ constitute product support longitudinal members and the mobile longitudinal members such as 30 constitute beams for transporting products. These support and transport beams can move vertically with respect to the roller lines 26, 26 ′ so as to pass from a maximum elevation position, in which the upper surface of the beams is at a higher level relative to the roller lines 26, 26 ′ at a minimum elevation position in which the upper surface of these beams is at a lower level compared to the roller lines.

Les longerons de transport tels que 30 sont situés à une certaine distance des longerons de support 28, comme on peut le voir sur la figure 3 et ils peuvent se soulever par rapport à ces longerons de support tout en pouvant également se déplacer horizontalement afin de faire avancer les produits pas-à-pas. Ainsi qu'on va le voir ci-après, chaque produit métallurgique tel que les brames minces B, B′ correspondant à chaque file est saisi de façon sélective grâce au mouvement relatif des longerons de support 28, 28′ et des longerons de transport 30. Lorsque les conditions d'exploitation le permettent, les longerons mobiles de transport et de support assurent le déplacement des produits en attente dans la zone de stockage située entre les tables à rouleaux 26, 26′, vers le circuit normal d'exploitation. On réalise ainsi une capacité de stockage qui permet de poursuivre la coulée continue en cas d'arrêt même prolongé du travail de la ligne de laminage.The transport beams such as 30 are located at a certain distance from the support beams 28, as can be seen in FIG. 3 and they can lift relative to these support beams while also being able to move horizontally in order to make advance products step by step. As will be seen below, each metallurgical product such as the thin slabs B, B ′ corresponding to each row is selectively gripped by the relative movement of the support beams 28, 28 ′ and the transport beams 30 When operating conditions allow, the mobile transport and support beams ensure the movement of waiting products in the storage area located between the roller tables 26, 26 ′, towards the normal operating circuit. A storage capacity is thus produced which allows continuous casting to continue in the event of even prolonged stoppage of the work of the rolling line.

On se réfère maintenant aux figures 4 à 9 qui illustrent un premier mode de fonctionnement du dispositif selon la présente invention.Referring now to Figures 4 to 9 which illustrate a first mode of operation of the device according to the present invention.

La figure 4 représente de façon schématique l'installation lors de son fonctionnément normal, les brames minces B, B′ défilant en continu sur les tables à rouleaux 26, 26′ situées dans l'enceinte du four de stockage 22 selon les axes de coulée continue. Dans cette phase de fonctionnement, les longerons mobiles de support 28, 28′ et de transport 30 sont situés à un niveau repère -1, le niveau repère 0 étant celui du plan supérieur des rouleaux des tables 26, 26′.FIG. 4 schematically represents the installation during its normal operation, the thin slabs B, B ′ running continuously on the roller tables 26, 26 ′ situated in the enclosure of the storage oven 22 along the casting axes keep on going. In this operating phase, the mobile support beams 28, 28 ′ and transport 30 are located at a level -1, the level 0 being that of the upper plane of the rollers of the tables 26, 26 ′.

La figure 5 représente le début d'un cycle de prise du produit pour stockage, le but de ce cycle étant d'amener un produit B′ dans la zone de stockage située entre les deux tables à rouleaux 26, 26′. Le longeron de support 28 déplace verticalement le produit B jusqu'au niveau repère +2, ainsi le produit B qui reposait préalablement sur la table à rouleaux 26 restera immobile quels que soient les mouvements ultérieurs des autres longerons mobiles étant donné que son altitude (niveau +2) le maintient hors d'atteinte des longerons en mouvement. L'autre longeron de support 28′ déplace verticalement le produit B′ jusque dans le plan supérieur des rouleaux des tables à rouleaux 26, 26′ (niveau repère 0). Ensuite, le longeron mobile de transport 30 assure un déplacement du produit B′ selon un mouvement pas-à-pas:

  • - déplacement vertical du produit B′ jusqu'au niveau +1;
  • - déplacement horizontal du produit B′ vers la zone de stockage située entre les deux tables à rouleaux 26, 26′et;
  • - déplacement vertical du produit B′ jusqu'au niveau 0 et dépose de ce produit sur les longerons de support 28′.
FIG. 5 represents the start of a cycle for taking the product for storage, the purpose of this cycle being to bring a product B ′ into the storage area located between the two roller tables 26, 26 ′. The support beam 28 moves product B vertically up to the reference level +2, so product B which previously rested on the roller table 26 will remain stationary whatever the subsequent movements of the other mobile beams since its altitude (level +2) keeps it out of reach of the moving beams. The other support beam 28 ′ moves product B ′ vertically up to the upper plane of the rollers of the roller tables 26, 26 ′ (level mark 0). Then, the mobile transport beam 30 ensures a displacement of the product B ′ in a step-by-step movement:
  • - vertical displacement of product B ′ up to level +1;
  • - horizontal displacement of product B ′ towards the storage area located between the two roller tables 26, 26′et;
  • - vertical movement of product B ′ up to level 0 and deposit of this product on the support beams 28 ′.

On notera que le déplacement horizontal du produit tel que B′ peut être obtenu en une seule fois ou par la répétition de plusieurs cycles rectangulaires identiques de manière à amener le produit à stocker en tout emplacement voulu de la zone de stockage située entre les deux tables à rouleaux 26, 26′.It will be noted that the horizontal displacement of the product such as B ′ can be obtained at one time or by the repetition of several identical rectangular cycles so as to bring the product to be stored in any desired location of the storage area located between the two tables roller 26, 26 ′.

On se réfère maintenant à la figure 6 qui illustre la façon selon laquelle on réalise le stockage du produit B.We now refer to FIG. 6 which illustrates the manner in which the storage of product B is carried out.

Le produit B′ est placé sur les logerons 28, 28′ à l'altitude niveau +2 de façon à permettre d'effectuer librement le cycle de transfert du produit B, le produit B′ étant ainsi placé hors d'atteinte des différents éléments qui réalisent le déplacement du produit B vers la zone de stockage. De la manière décrite ci-dessus en référence à la figure 5, les longerons 28 placent tout d'abord le produit B dans le plan des rouleaux 26 au niveau 0 puis les longerons 30 effectuent un ou plusieurs cycles rectangulaires de manière à amener le produit B en position de stockage. Ce cycle de stockage du produit B se déroule de la même façon que le cycle de stockage du produit B′ décrit ci-dessus en référence à la figure 5.Product B ′ is placed on the housings 28, 28 ′ at altitude level +2 so as to allow the product B transfer cycle to be carried out freely, product B ′ being thus placed out of reach for the various elements who move product B to the storage area. As described above with reference to FIG. 5, the side members 28 firstly place the product B in the plane of the rollers 26 at level 0 then the side members 30 perform one or more rectangular cycles so as to bring the product B to the storage position. This storage cycle for product B takes place in the same way as the storage cycle for product B ′ described above with reference to FIG. 5.

La figure 7 représente l'opération de stockage des produits B et B′ sur les longerons mobiles 28, 28′ et 30 au niveau -1. Dans cette position de stockage les rouleaux 26, 26′ sont libres et ils peuvent transférer directement des autres produits tels que B1, B′1, selon chacun des axes des tables à rouleaux. Les produits B et B′ restent dans la zone de stockage et les mouvements verticaux des longerons mobiles de support 28, 28′ et de transport 30 permettent de faire varier le point de supportage du produit et par conséquent de limiter la déformation à chaud de ces derniers ainsi que la formation de traces noires.FIG. 7 represents the storage operation of products B and B ′ on the mobile beams 28, 28 ′ and 30 at level -1. In this storage position the rollers 26, 26 ′ are free and they can directly transfer other products such as B1, B′1, along each of the axes of the roller tables. Products B and B ′ remain in the storage area and the vertical movements of the mobile support beams 28, 28 ′ and of transport 30 make it possible to vary the point of support of the product and consequently to limit the hot deformation of these as well as the formation of black marks.

La figure 8 représente la prise d'un second produit B′1 sur la table à rouleaux 26′. Ce cycle va se dérouler de la manière décrite précédemment: on commence par assurer un dégagement des produits B et B1 au niveau +2 de manière à les mettre hors d'atteinte des éléments mobiles qui sont mis en oeuvre pour assurer le déplacement des produits B′et B′1 vers la zone de stockage, on assure ensuite le déplacement des longerons de support 28′ par soulèvement jusqu'au niveau 0 puis on réalise un déplacement horizontal des deux produits B′ et B′1 grâce aux longerons de transport 30 qui effectuent un ou plusieurs cycles rectangulaires de la manière décrite ci-dessus. On a ainsi amené les produits B′ et B′1 en deux emplacements successifs de la zone de stockage. On peut bien entendu effectuer une opération similaire de l'autre côté de l'installation, c'est-à-dire du côté de la table à rouleaux 26, afin de déplacer les produits B et B1 vers la zone de stockage.FIG. 8 represents the taking of a second product B′1 on the roller table 26 ′. This cycle will take place in the manner described above: we begin by ensuring the release of products B and B1 at level +2 so as to put them out of the reach of the mobile elements which are used to move products B ′ And B′1 towards the storage area, then the support beams 28 ′ are moved by lifting up to level 0, then a horizontal displacement of the two products B ′ and B′1 is carried out using the transport beams 30 which perform one or more rectangular cycles as described above. Products B ′ and B′1 were thus brought to two successive locations in the storage area. It is of course possible to perform a similar operation on the other side of the installation, that is to say on the side of the roller table 26, in order to move the products B and B1 towards the storage area.

Sur la figure 9 on a représenté un exemple de capacité maximale de stockage de huit produits. Dans cette configuration, la zone de stockage comporte deux fois trois produits respectivement B, B1, B2 et B′, B′1, B′2, provenant respectivement de chacune des lignes de coulée continue et deux produits B3, B′3 en attente sur les tables à rouleaux 26, 26′ du four de stockage selon la présente invention.FIG. 9 shows an example of the maximum storage capacity of eight products. In this configuration, the storage area comprises two products three times B, B1, B2 and B ′, B′1, B′2 respectively, coming respectively from each of the lines of continuous casting and two products B3, B′3 waiting on the roller tables 26, 26 ′ of the storage oven according to the present invention.

On décrira maintenant la façon selon laquelle on effectue l'évacuation des produits.We will now describe the manner in which the evacuation of the products is carried out.

Après une opération de stockage, la configuration peut être celle illustrée par la figure 7, selon laquelle deux produits B, B′ ont été positionnés dans la zone de stockage, jusqu'à la configuration illustrée par la figure 9 dans laquelle il existe six produits présents dans la zone de stockage. Dans tous les cas, le mode de mise en oeuvre de l'invention pour assurer l'évacuation des produits à l'aide des tables à rouleaux 26, 26′ sera identique.After a storage operation, the configuration can be that illustrated in FIG. 7, according to which two products B, B ′ have been positioned in the storage area, up to the configuration illustrated in FIG. 9 in which there are six products present in the storage area. In all cases, the mode of implementation of the invention for ensuring the evacuation of the products using the roller tables 26, 26 ′ will be identical.

L'évacuation des produits commence par les produits qui sont présents sur les tables à rouleaux 26, 26′, ces produits suivant le cycle habituel de transfert. Quand une table à rouleaux située en regard de la zone de stockage est libre, on place les produits stockés, correspondant à l'autre file de coulée continue hors de portée des éléments mobiles mis en eouvre pour assurer l'évacuation d'un produit sur ladite table à rouleaux, en utilisant les longerons mobiles 28, 28′ et 30 de manière à amener les produits à isoler au niveau +2, comme représenté par exemple sur la figure 8 (partie gauche). On réalise ensuite le cycle inverse de celui décrit ci-dessus lors du stockage, pour effectuer le déplacement et le dépôt du produit à évacuer sur la table à rouleaux. Ce cycle s'effectue par un mouvement de soulèvement obtenu à l'aide des longerons de support tels que 28, 28′ et par un mouvement rectangulaire des longerons de transport 30. Après sa dépose sur la table à rouleaux considérée, le produit ainsi déstocké est évacué dans le circuit normal comme indiqué ci-dessus. Cette opération peut se dérouler de façon identique pour chaque produit suivant, présent dans la zone de stockage jusqu'à vider totalement cette zone et reprendre une fabrication normale c'est-à-dire un passage des produits directement au travers du four de stockage sur les tables à rouleaux 26, 26′ vers les sorties d'évacuation correspondantes.The evacuation of the products begins with the products which are present on the roller tables 26, 26 ′, these products following the usual transfer cycle. When a roller table located next to the storage area is free, the stored products are placed, corresponding to the other continuous casting line, out of the reach of the moving elements used to ensure the evacuation of a product on said roller table, using the movable beams 28, 28 ′ and 30 so as to bring the products to be insulated to the level +2, as shown for example in FIG. 8 (left part). The cycle opposite to that described above is then carried out during storage, in order to move and deposit the product to be removed on the roller table. This cycle is carried out by a lifting movement obtained using the support beams such as 28, 28 ′ and by a rectangular movement of the transport beams 30. After being deposited on the roller table considered, the product thus removed from storage is evacuated in the normal circuit as indicated above. This operation can take place in the same way for each subsequent product, present in the storage area until completely emptying this area and resume normal production, that is to say passing the products directly through the storage oven on the roller tables 26, 26 ′ towards the corresponding evacuation outlets.

On se réfère maintenant aux figures 10 à 14 qui illustrent une variante de réalisation du dispositif selon cette invention.Referring now to Figures 10 to 14 which illustrate an alternative embodiment of the device according to this invention.

Cette variante se distingue essentiellement du mode de réalisation décrit ci-dessus en référence aux figures 4 à 9, en ce que les longerons mobiles de transport sont répartis par paire 30, 30′ entre les longerons de support 28, 28′. Cette configuration permet de réaliser un stockage des produits tels que B, B′ à partir de l'une ou de l'autre des tables à rouleaux 26, 26′ disposées selon l'axe des deux lignes de coulée continue, ce stockage étant réalisé de façon totalement indépendante pour les deux lignes. Ainsi, on obtient deux zones de stockage indépendantes S1 et S2 recevant respectivement les produits à stocker tels que B, B′ qui proviennent des tables à rouleaux respectives 26, 26′. Il est ainsi possible de stocker un produit dans l'une des zones alors qu'un produit est en cours de chargement sur les rouleaux correspondant à l'autre zone de stockage.This variant differs essentially from the embodiment described above with reference to Figures 4 to 9, in that the mobile transport beams are distributed in pairs 30, 30 ′ between the support beams 28, 28 ′. This configuration allows storage of products such as B, B ′ from one or the other of the roller tables 26, 26 ′ arranged along the axis of the two continuous casting lines, this storage being carried out completely independently for the two lines. Thus, two independent storage zones S1 and S2 are obtained, respectively receiving the products to be stored such as B, B ′ which come from the respective roller tables 26, 26 ′. It is thus possible to store a product in one of the zones while a product is being loaded on the rollers corresponding to the other storage zone.

On se réfère maintenant aux figures 11 à 14 qui illustrent le stockage des produits dans le cas de cette variante, à l'aide de schémas qui correspondent aux schémas des figures 4 à 9.Reference is now made to FIGS. 11 to 14 which illustrate the storage of the products in the case of this variant, using diagrams which correspond to the diagrams in FIGS. 4 to 9.

Sur la figure 10 on a représenté la phase de départ. Dans la situation ainsi illustrée un produit B est en cours de défilement sur la table à rouleaux 26 et sur la table à rouleaux 26′ est présent un produit B′que l'on veut maintenant stocker sur la zone de stockage S2.In FIG. 10, the starting phase is shown. In the situation thus illustrated a product B is being scrolled on the roller table 26 and on the roller table 26 ′ is present a product B ′ which we now want to store in the storage area S2.

La figure 11 représente la première phase de cette opération de stockage. Lors de cette phase, les longerons mobiles 28 et 30 qui correspondent à la zone de stockage S1 des produits amenés par la table à rouleaux 26, sont maintenus immobiles de manière à ne pas gêner le déplacement du produit B qui est acheminé de façon normale sur les rouleaux de la table 26. Les longerons de support 28 se soulèvent jusqu'au niveau 0 dans le plan supérieur des rouleaux 26′, puis, les longerons de transport 30′ sont déplacés selon un ou plusieurs cycles rectangulaires de la manière déjà décrite ci-dessus en référence aux figures 4 à 9, de manière à amener le produit B′ en position de stockage dans la zone de stockage S2.Figure 11 shows the first phase of this storage operation. During this phase, the mobile beams 28 and 30 which correspond to the storage area S1 of the products brought in by the roller table 26, are kept stationary so as not to hinder the movement of the product B which is routed in a normal manner the rollers of the table 26. The support beams 28 lift up to level 0 in the upper plane of the rollers 26 ′, then the transport beams 30 ′ are moved according to one or more rectangular cycles in the manner already described below above with reference to FIGS. 4 to 9, so as to bring the product B ′ into the storage position in the storage area S2.

La figure 12 représente maintenant le chargement du produit B dans la zone de stockage S1. Lors du déroulement de cette phase le produit B′ reste immobile dans sa zone de stockage S2, les longerons 28′ et 30′ n'étant pas déplacés. Le fonctionnement de la table à rouleaux 26′ permet d'acheminer un produit B′1 de façon normale au travers du four de stockage. De la manière déjà décrite ci-dessus un déplacement vertical des longerons de support 28, suivi d'un ou de plusieurs cycles rectangulaires des longerons de transport 30 permettent d'amener le produit B dans la position de stockage, dans la zone S1, comme illustré par la figure 12.FIG. 12 now shows the loading of product B in the storage area S1. During the course of this phase, the product B ′ remains stationary in its storage area S2, the side members 28 ′ and 30 ′ not being moved. The operation of the roller table 26 ′ makes it possible to convey a product B′1 in a normal manner through the storage oven. As already described above, a vertical displacement of the support beams 28, followed by one or more rectangular cycles of the transport beams 30 make it possible to bring the product B to the storage position, in the zone S1, as illustrated by figure 12.

La figure 13 représente la situation après le chargement des produits B et B′ dans leur zone de stockage respective S1 et S2, les tables à rouleaux 26, 26′ assurant un acheminement direct des produits B1 et B′1 au travers du four de stockage.FIG. 13 represents the situation after the loading of products B and B ′ in their respective storage area S1 and S2, the roller tables 26, 26 ′ ensuring a direct routing of products B1 and B′1 through the storage oven .

La figure 14 est un schéma similaire à la figure 9 illustrant un exemple de configuration maximale d'un stockage de huit produits. Dans cette configuration, la zone de stockage S1 comporte quatre produits B, B1, B2, B3 dont l'un B3 est supporté par la table à rouleaux 26 et, de même la zone de stockage S2 comporte quatre produits B′, B′1, B′2, B′3 dont l'un B′3 est supporté par la table à rouleaux 26′. On notera que l'on peut obtenir toute configuration de stockage intermédiaire allant de zéro à six produits dans les zones de stockage S1, S2 plus un ou deux produits au maximum sur les tables à rouleaux 26, 26′.Figure 14 is a diagram similar to Figure 9 illustrating an example of maximum configuration of a storage of eight products. In this configuration, the storage area S1 comprises four products B, B1, B2, B3, one of which B3 is supported by the roller table 26 and, similarly the storage area S2 comprises four products B ′, B′1 , B′2, B′3 one of which B′3 is supported by the roller table 26 ′. Note that one can obtain any intermediate storage configuration ranging from zero to six products in the storage areas S1, S2 plus one or two products at most on the roller tables 26, 26 ′.

Dans cette variante, l'évacuation des produits stockés dans les zones S1, S2 s'effectue de façon identique à celle décrite ci-dessus en référence aux figures 4 à 9, mais de façon indépendante pour chaque zone grâce aux deux séries indépendantes de longerons mobiles de transport 30, 30′.In this variant, the evacuation of the products stored in the zones S1, S2 is carried out in an identical manner to that described above with reference to FIGS. 4 to 9, but independently for each zone thanks to the two independent series of beams transport mobiles 30, 30 ′.

Le dispositif objet de la présente invention peut être implanté à la sortie des deux fours 16, 16′ (figure 1) de façon à assurer la fonction de stockage de ces produits en cas de problème sur la ligne de laminage 20, mais il peut également être mis en oeuvre de façon à assurer le transfert des produits des deux lignes de coulée continue vers la ligne de laminage. Cette variante de mise en oeuvre de l'invention est représentée de façon schématique sur la figure 15. Sur cette figure les deux lignes de coulée continue 10, 10′ alimentent respectivement des fours 16, 16′ à la sortie desquels est disposé le four de stockage et de transfert selon l'invention désigné par la référence F et qui alimente une ligne de laminage désignée dans son ensemble par la référence L.The device which is the subject of the present invention can be installed at the outlet of the two ovens 16, 16 ′ (FIG. 1) so as to ensure the storage function of these products in the event of a problem on the rolling line 20, but it can also be implemented so as to ensure the transfer of the products from the two continuous casting lines to the rolling line. This variant implementation of the invention is shown diagrammatically in FIG. 15. In this figure the two continuous casting lines 10, 10 ′ respectively supply ovens 16, 16 ′ at the outlet of which the furnace is arranged. storage and transfer according to the invention designated by the reference F and which feeds a rolling line designated as a whole by the reference L.

On se réfère maintenant aux figures 16 à 19 qui illustrent le mode de fonctionnement de cette variante selon l'invention.Reference is now made to FIGS. 16 to 19 which illustrate the mode of operation of this variant according to the invention.

Dans cette variante les moyens qui assurent le déplacement des produits vers la zone de stockage à partir des tables à rouleaux 26, 26′ sont identiques à ceux décrits ci-dessus en référence aux figures 1 à 9, c'est-à-dire qu'ils sont constitués de longerons mobiles de support 28, 28′ et de longerons de transport 30 pouvant se déplacer selon un mouvement rectangulaire.In this variant the means which ensure the movement of the products to the storage area from the roller tables 26, 26 ′ are identical to those described above with reference to Figures 1 to 9, that is to say that 'They consist of mobile support beams 28, 28 ′ and transport beams 30 which can move in a rectangular movement.

La figure 16 illustre la situation initiale. Dans cette situation, un produit B′ provenant de la ligne de coulée continue 10′ et du four 16′ est en cours d'évacuation sur les rouleaux de la table à rouleaux 26′ vers la ligne de laminage L située selon son axe. Simultanément, les rouleaux de la table à rouleaux 26 peuvent charger un autre produit B.Figure 16 illustrates the initial situation. In this situation, a product B ′ coming from the continuous casting line 10 ′ and from the furnace 16 ′ is being evacuated on the rollers of the roller table 26 ′ towards the rolling line L located along its axis. Simultaneously, the rollers of the roller table 26 can load another product B.

La figure 17 illustre la phase de transfert du produit B vers la ligne de laminage. Les rouleaux de la table à rouleaux 26′ sont libres et le déplacement des longerons mobiles 28, 28′ et 30 permettent de saisir le produit B sur les rouleaux de la table à rouleaux 26 et de le placer au début de la zone de stockage. La répétition de plusieurs cycles rectangulaires des longerons de transport 30, de la même manière que décrite ci-dessus permet de déplacer le produit B pour l'amener à l'extrémité de la zone de stockage opposée à la table à rouleaux 26. Sur la figure 17, le produit B a été finalement amené à la position B1, immédiatement à proximité de la table à rouleaux 26′ demeurée libre.FIG. 17 illustrates the phase of transfer of product B to the rolling line. The rollers of the roller table 26 ′ are free and the displacement of the movable beams 28, 28 ′ and 30 makes it possible to grab the product B on the rollers of the roller table 26 and to place it at the start of the storage area. The repetition of several rectangular cycles of the transport beams 30, in the same manner as described above makes it possible to move the product B to bring it to the end of the storage area opposite the roller table 26. On Figure 17, the product B was finally brought to position B1, immediately near the roller table 26 'remained free.

Lors de la phase de fonctionnement illustrée par la figure 18, le produit B est déposé sur les rouleaux de la table à rouleaux 26′ grâce au mouvement des longerons 28′ et 30 de façon à pouvoir être ensuite évacué vers la ligne de laminage L.During the operating phase illustrated in FIG. 18, the product B is deposited on the rollers of the roller table 26 ′ by virtue of the movement of the side members 28 ′ and 30 so that it can then be evacuated towards the rolling line L.

Dans cette variante de l'invention, il est également possible lors d'un incident sur la ligne de laminage L de stocker les produits comme décrit précédemment.In this variant of the invention, it is also possible during an incident on the rolling line L to store the products as described above.

La figure 19 représente cette possibilité de stockage et elle illustre un exemple de capacité maximale de stockage de huit produits, selon une configuration similaire à celles illustrées par les figures 9 et 14. Dans cette configuration, il existe deux fois trois produits respectivement B, B1, B2 et B′, B′1, B′2 dans la zone de stockage et deux produits respectivement B3, B′3 sur les tables à rouleaux 26, 26′. Le déstockage s'effectue d'une manière similaire à celle décrite ci-dessus, c'est-à-dire que cette opération commence par le produit B′3 situé sur la table à rouleaux 26′, ce produit étant évacué directement vers la ligne de laminage L puis les produits successifs suivants B′2, B′1, B′, B, B1, B2, B3 sont évacués successivement par la table à rouleaux 26′ sur laquelle ils sont amenés les uns à la suite des autres par des cycles rectangulaires de déplacement des longerons de transport 30.FIG. 19 represents this possibility of storage and it illustrates an example of maximum storage capacity of eight products, according to a configuration similar to those illustrated by FIGS. 9 and 14. In this configuration, there are twice three products respectively B, B1 , B2 and B ′, B′1, B′2 in the storage area and two products respectively B3, B′3 on the roller tables 26, 26 ′. The destocking is carried out in a similar manner to that described above, that is to say that this operation begins with the product B′3 located on the roller table 26 ′, this product being discharged directly to the rolling line L then the following successive products B′2, B′1, B ′, B, B1, B2, B3 are successively removed by the roller table 26 ′ onto which they are brought one after the other by rectangular cycles of movement of the transport beams 30.

Les avantages apportés par le dispositif selon l'invention décrit ci-dessus sont notamment les suivants:

  • - possibilité de créer une zone de stockage dans une installation sans en augmenter la longueur;
  • - la capacité de stockage ainsi réalisée permet d'assurer une poursuite de la coulée continue en cas d'arrêt même prolongé du travail sur la ligne de laminage;
  • - le stockage des produits est assuré dans une enceinte à température contrôlée ce qui évite toute altération de la température des produits stockés ou toute modification de la répartition de cette temperature;
  • - après un arrêt, même de longue durée de la ligne de laminage, les conditions et la capacité de stockage des produits permettent d'obtenir un redémarrage rapide de la ligne de laminage;
  • - la disposition ainsi que le déplacement des longerons mobiles permettent de limiter la déformation à chaud des produits, même pendant des arrêts de longue durée, en faisant varier les points de supportage de ces produits sur la surface des longerons;
  • - en fonctionnement normal de l'installation, c'est-à-dire en l'absence de pannes ou d'incidents sur la ligne de laminage, le circuit suivi par les produits n'est pas perturbé par le stockage.
The advantages provided by the device according to the invention described above are in particular the following:
  • - possibility of creating a storage area in a facility without increasing its length;
  • the storage capacity thus produced makes it possible to ensure continued continuous casting in the event of even prolonged stoppage of work on the rolling line;
  • - the products are stored in a temperature-controlled enclosure which prevents any alteration of the temperature of the stored products or any modification of the distribution of this temperature;
  • - after a shutdown, even of a long duration of the rolling line, the conditions and the storage capacity of the products allow a rapid restart of the rolling line;
  • - The arrangement as well as the movement of the movable beams make it possible to limit the hot deformation of the products, even during long stops, by varying the support points of these products on the surface of the beams;
  • - during normal operation of the installation, that is to say in the absence of breakdowns or incidents on the rolling line, the circuit followed by the products is not disturbed by storage.

Il demeure bien entendu que la présente invention n'est pas limitée aux divers exemples de réalisation de mise en oeuvre ou d'application décrits et mentionnés ci-dessus mais qu'elle en englobe toutes les variantes.It remains to be understood that the present invention is not limited to the various examples of implementation or application described and mentioned above, but that it encompasses all variants thereof.

Claims (5)

- Dispositif pour assurer le stockage de produits métallurgiques tels que notamment des brames minces, conçu particulièrement pour être installé en aval de deux lignes parallèles de coulée continue, fonctionnant simultanément et en amont d'un système de transfert des produits, pour assurer une alimentation continue d'une ligne de laminage à l'aide de produits provenant indifféremment et alternativement de chaque ligne de coulée continue, ce dispositif étant caractérisé en ce qu'il comprend: - une enceinte de stockage chauffée (22), présentant une longueur au moins égale à la longueur des produits à stocker (B, B′) et comportant des entrées et des sorties opposées pour les produits provenant des lignes de coulée continue et délivrés à la ligne de laminage, ces produits se déplaçant dans ladite enceinte sur des tables à rouleaux (26, 26′) disposées respectivement selon les axes des lignes de coulée continue et; - une zone de stockage dans ladite enceinte, située entre les deux tables à rouleaux et comprenant des longerons mobiles: respectivement des longerons de support (28, 28′) des produits, pouvant se déplacer verticalement entre plusieurs niveaux et des longerons de transport (30), situés à une certaine distance des longerons de support et pouvant se déplacer verticalement et horizontalement afin de faire avancer pas à pas les produits selon une série de mouvements rectangulaires successifs, lesdits longerons étant implantés successivement entre deux rouleaux de chaque table à rouleaux (26, 26′) de manière que le produit à stocker correspondant à chaque ligne de coulée continue puisse être successivement saisi et déplacé parallèlement à son axe par lesdits longerons mobiles afin d'être déposé pour stockage entre les deux rangées de tables à rouleaux. - Device for ensuring the storage of metallurgical products such as in particular thin slabs, designed particularly to be installed downstream of two parallel continuous casting lines, operating simultaneously and upstream of a product transfer system, to ensure continuous supply a rolling line using products from each continuous casting line, alternately, this device being characterized in that it comprises: - a heated storage enclosure (22), having a length at least equal to the length of the products to be stored (B, B ′) and comprising opposite inlets and outlets for the products coming from the continuous casting lines and delivered to the rolling line, these products moving in said enclosure on roller tables (26, 26 ′) disposed respectively along the axes of the continuous casting lines and; - a storage area in said enclosure, located between the two roller tables and comprising movable beams: respectively support beams (28, 28 ′) of products, which can move vertically between several levels and transport beams (30 ), located at a certain distance from the support rails and able to move vertically and horizontally in order to advance the products step by step in a series of successive rectangular movements, said rails being successively installed between two rollers of each roller table (26 , 26 ′) so that the product to be stored corresponding to each continuous casting line can be successively gripped and moved parallel to its axis by said movable beams in order to be deposited for storage between the two rows of roller tables. - Dispositif selon la revendication 1, caractérisé en ce que les rouleaux desdites tables (26, 26′) sont entraînés de l'extérieur du four de stockage (22) par l'intermédiaire d'un arbre en porte-à-faux.- Device according to claim 1, characterized in that the rollers of said tables (26, 26 ′) are driven from outside the storage oven (22) by means of a cantilevered shaft. - Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce que les longerons mobiles de support (28, 28′) sont répartis en deux séries identiques disposées parallèlement dans deux emplacements de la zone de stockage et en ce qu'on prévoit une série unique de longerons de transport (30), chaque longeron de ladite série étant positionné entre deux paires de longerons de support de chaque emplacement de la zone de stockage pour assurer indifféremment un déplacement des produits dans l'un ou l'autre de ces emplacements de stockage.- Device according to one of claims 1 or 2, characterized in that the mobile support beams (28, 28 ′) are distributed in two identical series arranged in parallel in two locations of the storage area and in that provision is made a single series of transport beams (30), each beam of said series being positioned between two pairs of support beams in each location of the storage area to ensure the movement of the products in either of these storage locations. - Dispositif selon la revendication 1 conçu de façon à assurer un stockage et une évacuation indépendants des produits stockés sur chaque rangée de tables à rouleaux respectives, chaque langeron de transport étant divisé en deux parties indépendantes (30, 30′) permettant d'obtenir deux zones indépendantes de stockage (S1, S2), chaque zone étant ainsi alimentée à partir de chaque table à rouleaux respective.- Device according to claim 1 designed to ensure independent storage and evacuation of the products stored on each row of respective roller tables, each transport langeron being divided into two independent parts (30, 30 ′) making it possible to obtain two independent storage areas (S1, S2), each area thus being supplied from each respective roller table. - Application d'un dispositif selon la revendication 1, au stockage et au transport de produits provenant de deux lignes de coulée continue parallèles et acheminés vers une ligne de laminage, caractérisée en ce que les produits pénètrent dans l'enceinte de stockage sur l'une des tables à rouleaux (26) et ressortent de cette enceinte sur l'autre table à rouleaux (26′) pour être transférés à ladite ligne de laminage, les produits étant transportés entre les deux tables à rouleaux à l'aide des longerons mobiles (28, 28′, 30) ces produits pouvant en outre être stockés dans la zone située entre les deux tables à rouleaux.- Application of a device according to claim 1, to the storage and transport of products from two parallel continuous casting lines and routed to a rolling line, characterized in that the products enter the storage enclosure on the one of the roller tables (26) and emerge from this enclosure on the other roller table (26 ′) to be transferred to said rolling line, the products being transported between the two roller tables using the movable beams (28, 28 ′, 30) these products can also be stored in the area between the two roller tables.
EP90403396A 1989-12-19 1990-11-29 Stocking device for metallurgical products, such as thin slabs Withdrawn EP0434487A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8916811 1989-12-19
FR8916811A FR2655894B1 (en) 1989-12-19 1989-12-19 DEVICE FOR STORING METALLURGICAL PRODUCTS, SUCH AS THIN SLABS.

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CN (1) CN1055496A (en)
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US4229878A (en) * 1978-11-30 1980-10-28 Chugairo Kogyo Kaisha Ltd. Method of operating a reheating furnace in a hot rolling line and a reheating furnace employed therefor
EP0302257A1 (en) * 1987-08-05 1989-02-08 DANIELI &amp; C. OFFICINE MECCANICHE S.p.A. Equalization furnace for continuously cast billets
EP0313726A2 (en) * 1987-10-29 1989-05-03 Didier Ofu Engineering Gmbh Process and furnace to heat slabs, billets, ingots, sheets, steel bands and similar charges
EP0353487A1 (en) * 1988-07-26 1990-02-07 DANIELI &amp; C. OFFICINE MECCANICHE S.p.A. Plant to roll flat products

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US5075953A (en) 1991-12-31
FR2655894A1 (en) 1991-06-21
BR9006433A (en) 1991-09-24
CN1055496A (en) 1991-10-23
FR2655894B1 (en) 1994-05-27

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