EP0493360A1 - Installation de coulée continue pour brames suivie d'un laminoir - Google Patents

Installation de coulée continue pour brames suivie d'un laminoir Download PDF

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Publication number
EP0493360A1
EP0493360A1 EP91890307A EP91890307A EP0493360A1 EP 0493360 A1 EP0493360 A1 EP 0493360A1 EP 91890307 A EP91890307 A EP 91890307A EP 91890307 A EP91890307 A EP 91890307A EP 0493360 A1 EP0493360 A1 EP 0493360A1
Authority
EP
European Patent Office
Prior art keywords
furnace
longitudinal
slab
conveyor
gripper arms
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Withdrawn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
EP91890307A
Other languages
German (de)
English (en)
Inventor
Dietmar Ing. Eichler
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.)
Primetals Technologies Austria GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP0493360A1 publication Critical patent/EP0493360A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0073—Seals
    • F27D99/0076—Furnace car seals, i.e. seals used in continuous furnaces or kilns for preventing gas or heat exchange between heating chamber and the area comprising driving means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • 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
    • 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
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/201—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace walking beam furnace
    • F27B9/202—Conveyor mechanisms therefor
    • F27B9/203—Conveyor mechanisms therefor having ramps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • 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
    • F27B9/2461—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 charge being suspended from the conveyor
    • 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
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B2009/3094—Means to store a part of the charge in the furnace
    • 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
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/0068—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising clamps or tongs
    • 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
    • F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
    • F27D2003/008—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising cross-beams or gantry cranes
    • 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
    • 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 invention relates to a continuous slab caster, in particular a thin slab caster, with a downstream rolling mill, an oven with an input side, an output side and with a cross conveyor for conveying a slab between a strand separating device provided on an outlet roller table of the continuous caster and the rolling mill a longitudinal conveyor arranged on the input side to a longitudinal conveyor arranged on the output side with a storage space for a slab arranged parallel to the longitudinal conveyor is provided.
  • a system of this type is known from DE-A - 37 41220 and EP-A - 0 264 459.
  • the furnace which is T-shaped in cross section, has a horizontally directed and a vertically directed part, a transverse conveyor device being provided in the horizontally directed part, which has a plurality of storage spaces for the slabs lying next to one another.
  • a vertically movable shelf-like storage with compartments for individual slabs is provided, in which several slabs in an emergency, i.e. when the rolling mill is at a standstill, so that the casting operation does not have to be interrupted.
  • This known system is structurally complex and requires a considerable investment, especially since a vertically movable shelf is required, which must be able to raise and lower all the slabs stored on this shelf at the same time.
  • the cross conveyor which can only be implemented as a walking beam system in the known furnace, is tied to its gradual conveying out, so that the dwell time of a slab in the furnace depends solely on the conveying capacity of the cross conveyor and the number of storage spaces on it.
  • the invention aims to avoid these disadvantages and difficulties and has as its object to create a system of the type described in the opening paragraph in which the furnace has a compact design, i.e. in which the furnace has only a small transverse extension and a very small vertical extension.
  • the manipulation devices for cross-conveying the slabs should also be able to be used when storing slabs, so that no separate devices are required for this.
  • At least one fixed hearth with a minimum width adapted to a slab width is provided in the furnace parallel to the longitudinal conveying devices and that the transverse conveying device is formed by a hoist protruding through the furnace roof into the interior of the furnace, which is from a position above the longitudinal conveyors can be moved into a position above the fixed hearth and vice versa.
  • the cross conveyor can be used both for placing slabs on the fixed hearth and for further conveying from the fixed hearth to the output side, such a single transverse conveyor being readily usable for a furnace with more than one input side.
  • all of the slab manipulations can be carried out in a simple manner within the furnace with a single transverse conveyor device, and the furnace can be of extremely compact construction.
  • the fixed hearth is preferably designed to receive a plurality of slabs stacked one above the other. As a result, many slabs can be stored in the furnace without the space-consuming expansion of the furnace being necessary for this. All you have to do is adjust the height of the furnace to the maximum desired storage capacity.
  • the hoist is expediently equipped with gripping tongs arms which engage on the longitudinal edges of the slab and are arranged distributed over the length of the furnace.
  • the gripper arms are sealed off from the furnace ceiling in a manner known per se by means of a liquid seal.
  • the gripper arms can advantageously be retracted into a recess provided in the furnace ceiling in the rest position, the recess forming the rest position of the gripper arms advantageously being limited by a coolant jacket.
  • a preferred embodiment is characterized in that the gripper arms are each surrounded by a sleeve arranged above the furnace ceiling, which sleeve has a liquid seal at its upper end into which a diving bell engaging on the gripper arm is immersed, and which sleeve at its lower end in a cross sealing tape running to the sleeve, preferably a metal tape, is sealingly inserted, which sealing tape extends in a fairway arranged along the travel path of the hoist and rests with its longitudinal side edge regions on support surfaces arranged in the longitudinal direction of the fairway and at the ends of the fairway also extending transversely to it and is pressed against it along the fairway and at the ends of the fairway also sealing strips extending transversely to it, the sealing strip during a movement of the hoist between the sealing strips and the contact surfaces is displaceable and the ends of the sealing tape can each be wound up or unwound onto a drum.
  • a further channel with a central slot-shaped passage opening for the gripping tongs arms is expediently provided below the channel, which serves to absorb leakage fluid.
  • a particularly advantageous embodiment which is less susceptible to malfunction even at high furnace temperatures, is characterized in that the longitudinal conveying devices are formed by synchronous conveying devices, the synchronous conveying devices expediently being equipped with internally cooled support elements projecting into the furnace interior.
  • the support elements advantageously extend transversely to the transport direction over approximately the entire width of the slab and are equipped with extensions that extend in the transport direction, each between extensions of the adjacent support element as they approach the support elements engage each other.
  • the support elements extend in the transport direction and are equipped with widenings provided transversely to the transport direction, the widenings provided between adjacent support elements being at a distance.
  • securing hooks are articulated on the gripper arms, which, when the gripper arms are in a free position, assume a rest position in which their hook ends below the jaws of the gripper arms gripping the longitudinal slab edges protrude and grasp it slightly, advantageously the articulated
  • Fastening of the safety hook is realized by means of a parallelogram, the bridge of which forms a gripper arm and the coupling of which forms a safety hook.
  • the safety hooks are expediently equipped with a support lug, each of which engages in a corresponding recess on the gripper arm in the rest position of a safety hook, one engaging on the safety hook, vertical Force-absorbing surface of the recess contacts a corresponding support surface of the support nose.
  • the longitudinal conveying devices and the fixed hearth are advantageously equipped with upwardly curved slab supports in the transverse direction.
  • the furnace on its inlet side is expediently equipped with a preheating chamber adjoining the transverse wall of the furnace.
  • a preferred embodiment is characterized in that the furnace has at least two inlet sides and each has an outlet roller table of a continuous casting installation, a separate fixed hearth being provided for each inlet side, but the furnace having only a single outlet side.
  • FIG. 1 shows the plan of a system according to the invention according to a first embodiment
  • Fig. 2 shows a section along the line II-II of Fig. 1.
  • 3 and 4 each show a detail of the seal of the hoist relative to the furnace ceiling in the longitudinal section of the furnace according to one embodiment.
  • Fig. 5 4 shows a section taken according to the lines VV of FIG. 4.
  • FIGS. 6 and 7 show details of the longitudinal conveying devices of the system according to the invention in plan view. 8 and 9 illustrate details of the hoist in a longitudinal view of the furnace.
  • FIG. 10 shows a further embodiment in a representation analogous to FIG. 1.
  • slabs 5 of a predetermined length designate two run-out roller tables of a double-strand caster 3, at the ends of which separating devices 4 for separating the cast strand are provided in slabs 5 of a predetermined length, preferably in slabs 5 of the same length.
  • the slabs are so-called "thin slabs", i.e. Slabs up to 70 mm thick.
  • the plant according to the invention can also be used for normal slabs, that is slabs with a thickness of 100 mm and more.
  • the cut thin slabs pass from the outlet roller tables 1, 2, which they leave at a speed slightly exceeding the casting speed, for example 3 m / min, into a furnace 6 via the inlet side 7 thereof, are tempered and heated in the furnace 6 with respect to their temperature, so that they have the required rolling temperature everywhere over the cross section.
  • the thin slabs leave the furnace 6 via its outlet side 8 and are fed via a roller table 9 to a downstream rolling mill 10 at a rolling speed, for example 12 m / min.
  • the furnace 6 has a length that corresponds to the maximum desired slab length. This can be 30 to 50 m.
  • the cross section of the furnace 6 is rectangular.
  • the side walls 11, the bottom 12 and the ceiling 13 of the furnace are lined fire-proof and optionally heat-insulated.
  • Burners 14 are provided in the longitudinal side walls 11 and are put into operation when the heat of the slabs 5 is below the rolling temperature. These burners 14 could also be designed as ceiling burners; however, the oven could also be equipped with electrical heating.
  • a longitudinal conveyor device 15, 16 connects to each input side 7 of the furnace 6, which, in contrast to the prior art, is not designed as a roller table, but as a step-by-step conveyor device.
  • This has the advantage that the pimples which form on the rollers provided in the interior of the furnace and which cause pimples on the support side of the hot material and thus impair the surface quality of the end product can be avoided.
  • rollers inside the furnace would have to be equipped with water cooling because of the high furnace temperatures (rolling temperature), so that their removal to remove the pimples would be complicated.
  • the step-by-step conveying device is formed by support elements 18 which project into the furnace space 17 from below the base 12 of the furnace 6 and extend transversely to the longitudinal axis of the furnace.
  • the support elements 18 of a longitudinal conveyor device 15, 16 are mounted on two walking beam systems 19, 20 extending in the longitudinal direction of the furnace.
  • Each of the walking beam systems 19, 20 carries out a lifting and lowering movement and a movement in the conveying direction 21 and back. Every second of the support elements 18 is mounted on one and the same walking beam system 19, 20, so that two groups of support elements 18 are formed, each of which is raised and lowered individually and against one another in the longitudinal direction of the furnace 6, etc.
  • the longitudinal conveyor 22 connected to the roller table 9 to the rolling mill 10 on the exit side 8 of the furnace 6 is also designed as a synchronous conveyor.
  • Your support elements are 18 independent of the support elements 18 of the longitudinal conveyors 15, 16 located on the input sides 7, so that the thin slabs 5 are introduced into the furnace 6 at a speed slightly above the casting speed and on the other hand out of the furnace 6 at the rolling speed, i.e. tapping speed (at the Exit page 8) can be promoted.
  • the carrying elements 18 of all synchronous-step conveying devices have extensions 23 which extend in the conveying direction 21 and in the opposite direction. These projections 23, on which the thin slabs 5 also rest, engage in a comb-like manner when the support elements 18 move against one another, so that the thin slabs 5 are well supported and the thin slab end does not abut one of the support elements 18.
  • the support elements 18 are further equipped with an internal cooling 24, preferably designed as a liquid cooling, and have riders 25 made of heat-resistant steel on their support sides.
  • FIGS. 6 and 7. A somewhat modified embodiment of the support elements is shown in FIGS. 6 and 7.
  • the support elements 18 ', 18 ⁇ do not extend transversely to the transport direction 21 as in FIG. 1, but along the transport direction 21, i.e. parallel to the longitudinal direction of the furnace.
  • This variant is preferably provided for the transport of particularly thin thin slabs 5.
  • the counter-movable support elements 18 ', 18' of a synchronous conveyor 15, 16 and 22 have widenings 23 ', 23' directed transversely to their longitudinal extension. These widenings 23 ', 23 ⁇ engage, as shown in Figures 6 and 7, in one another. its longitudinal extent is such that the longitudinal movement of the oppositely movable support elements 18 ', 18 ⁇ is not hindered.
  • a fixed hearth 26 is provided laterally next to each of the longitudinal conveyor devices 15, 16 arranged on the input sides 7 is formed by firing blocks 27 made of refractory material one behind the other in the longitudinal direction of the furnace 6.
  • the thin slabs 5 placed in the furnace can be placed on these trestles 27, and, as will be explained later, the thin slabs 5 on the trestles 27 can also be stacked one on top of the other, etc. in the event of a rolling mill shutdown.
  • the extension of the trestles 27 in the transverse direction of the furnace 6 corresponds approximately to the maximum width of a strand to be cast on the continuous caster 3.
  • the trestles 27 could, however, also be designed twice as wide, for example to be able to accommodate two slabs 5 next to one another.
  • a lifting device 28 is used, which can be moved above the furnace roof 13 transversely to the longitudinal axis 19 of the furnace 6 along rails 29.
  • This hoist 28 has gripping tongs arms 30 which protrude through the furnace roof 13 into the interior 17 of the furnace and are provided distributed in the longitudinal direction of the furnace 6 in the required number depending on the thickness of the thin slabs 5.
  • Two gripping tongs arms 30 are arranged symmetrically and can be moved against one another for clamping the thin slabs 5 by means of jaws 32 acting on their slab longitudinal edges 31. Furthermore, the lifting and lowering gripper arms 30 can be raised into a rest position A (dash-dotted position in FIG.
  • a securing hook 35 is articulated at the lower end, the articulated attachment lying outside the furnace chamber 17 and being designed as a parallelogram.
  • the gripper arm 30 forms the web of the articulated parallelogram attachment and the securing hook 35 the coupling.
  • the rockers are on the one hand on the gripper arm 30 and on the other hand on the securing hook 35 hinged tabs 36 formed.
  • the securing hook 35 engages with its hook end 37 when the gripper arm 30 is located freely in the space below the jaw 32 of the gripper arm 30 contacting a slab longitudinal edge 31 and slightly engages under it.
  • Each securing hook 35 has a supporting lug 38 which, when the securing hook is lowered (cf. FIG. 8), projects into a corresponding recess 39 in the gripping arm, a downwardly directed supporting surface 40 of the supporting lug 38 making contact with a counter surface 41 of the recess which absorbs vertical forces. As a result, the joints of its articulated attachment are largely relieved when the securing hook 35 is loaded.
  • FIG. 3 illustrates a possibility for sealing the recesses provided in the furnace roof 13 for the gripper arms 30, which are designed as slots 42 which extend over the entire width of the furnace.
  • the gripping tongs arms 30 move along these slots 42 when the lifting device 28 is moved, since they protrude through, a pair of gripping tongs each passing through one of the slots 42.
  • Troughs 44 filled with liquid 43, such as water, are provided parallel to each slot 42, etc. one on each side of the slot 42. These two channels are connected at both ends of the slot so that the liquid 43 surrounds the slot 42 as a closed ring.
  • the furnace outer end of the gripper arm 30 is each attached to a cross member 45 extending transversely to the slot, which forms the shape of a T with the part of the gripper arm 30 projecting through the furnace roof 13.
  • a cross member 45 extending transversely to the slot, which forms the shape of a T with the part of the gripper arm 30 projecting through the furnace roof 13.
  • At the ends of this cross member 45 are perpendicular to downwardly extending U-shaped struts 46 fastened with their inner leg 47.
  • the respective outer legs 48 which extend beyond the inner legs 47 in length, are attached to a common cross member 49.
  • This cross member 49 which is directed parallel to the lower cross member 45, can be raised and lowered in the hoist 28 and can be displaced or pivoted in the transverse direction to grasp the slab edges and can be moved together with the hoist 28 over the length of the slot 42.
  • the U-shaped struts each protrude into one of the grooves 44 extending along the slot 42.
  • a bell 50 extending over the entire travel path of the hoist 28 is arranged in a fixed manner, the lower end of which in the Rinnen 44 protrudes, etc. each between the two legs 47, 48 of the U-shaped struts.
  • the bell 50 is formed closed on the longitudinal side walls 11 of the furnace 6 to form a ring, so that no furnace air can escape through the slot 42 to the outside.
  • each gripper arm 30 outside the furnace 6 is surrounded by a sleeve 51, which allows a slight transverse movement of the gripper arm 30 for the purpose of grasping the thin slab edges 31, but also when the hoist 28 is moved along the slot 42 the hoist 28 and thus with the gripper arms 30 is moved.
  • the upper end of the sleeve is surrounded by a channel filled with liquid 43, into which a diving bell 52 arranged on the gripper arm 30 is immersed.
  • the lower end of the sleeve 51 is sealingly inserted into a sealing band 53 running transversely to the sleeve 51, which sealing band extends transversely to the longitudinal direction of the furnace, that is to say in the direction of travel of the hoist 28, over the entire length of the slot 42.
  • This sealing band 53 is located in a channel 54 that extends over the entire width of the furnace and rests with its longitudinal edge regions on contact surfaces 55 of this channel 54.
  • the sealing tape 53 is by means of extending along the fairway 54 and extending transversely to the ends of the fairway 54 Sealing strips 56 are pressed against these contact surfaces 55, the contact surfaces 55 likewise extending transversely to the ends of the channel 54.
  • a sealing liquid 43 such as water, is filled between the sleeve 51 and the sealing strips 56.
  • a further channel 57 is provided below the channel 54, which has a central slot-shaped passage opening 58, which is penetrated by the gripper arms 30 and which follows the slot 42 of the oven ceiling 13 elongated at the top.
  • the leakage liquid is drained from this gutter 57 via a drain 59 and in turn fed back into the fairway 54 via a feed line 60.
  • the sealing tape 53 is flexible and preferably in the form of a metal tape (chrome-nickel steel) so that it does not require any space to the side of the oven 6 when moving the hoist, its ends can be wound up or unwound on drums 61 arranged on the vertical longitudinal side walls 11 of the oven 6.
  • a metal tape chrome-nickel steel
  • the supports on the support elements 18 or on the fixed hearth 26 are curved upward (cf. the dashed lines 62 of FIG. 2), so that the thin slabs 5 also bulge upwards. They can then be gripped by the gripper arms 30 in the upwardly curved state.
  • the furnace 6 ' is equipped on the input side with a preheating chamber 63, so that the last end of the thin slab 5 entering the furnace 6' has a residence time in the furnace 6 ' that is sufficient to bring this end to the rolling temperature or to achieve temperature compensation in this end.
  • a thin slab 5 is placed on the adjacent fixed hearth 26 from the inlet side 7. After it has been lifted off the inlet side 7, the next thin slab 5 can already be fed. After a certain time, in which the temperature equalization or the heating of the first thin slab 5 to the rolling temperature has taken place, the thin slab 5 first delivered is fed to the outlet side 8 with the lifting device 28 and from there to the rolling mill roller table 9 by means of the step-by-step conveyor device 22. The next thin slab 5 is then placed on the fixed hearth 26 from the inlet side 7.
  • the furnace 6 or 6 'does not have to be provided directly after the continuous caster 3. It can be provided between the outlet roller table 1 of the continuous casting machine 3 and the input side 7 of the furnace 6, 6 'various devices, such as a descaling device, a thickness measuring device, etc. Nor is it necessary that the roller table 9 leading to the rolling mill 10 be directly to the output side 8 of the furnace 6, 6 'connects.
  • the slabs 5 could, for example, also be transported with transport devices other than a roller table from the continuous casting plant 3 to the furnace 6 and from the furnace 6 to the rolling mill 10.
  • the furnace 6, 6 'can also be used for heating up or for temperature compensation of slabs coming from two or more continuous casting plants, which continuous casting plants can in turn be designed as one or more strands.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Metal Rolling (AREA)
  • Furnace Charging Or Discharging (AREA)
EP91890307A 1990-12-20 1991-12-16 Installation de coulée continue pour brames suivie d'un laminoir Withdrawn EP0493360A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2600/90 1990-12-20
AT0260090A AT396559B (de) 1990-12-20 1990-12-20 Brammen-stranggiessanlage mit nachgeordnetem walzwerk

Publications (1)

Publication Number Publication Date
EP0493360A1 true EP0493360A1 (fr) 1992-07-01

Family

ID=3537197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91890307A Withdrawn EP0493360A1 (fr) 1990-12-20 1991-12-16 Installation de coulée continue pour brames suivie d'un laminoir

Country Status (4)

Country Link
US (1) US5205342A (fr)
EP (1) EP0493360A1 (fr)
JP (1) JPH04285112A (fr)
AT (1) AT396559B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT510468B1 (de) * 2010-09-21 2012-07-15 Voestalpine Stahl Gmbh Durchlaufofen für ein insbesondere metallisches band
AT519697A1 (de) * 2017-03-03 2018-09-15 Primetals Technologies Germany Gmbh Verfahren zur kontinuierlichen Herstellung von Stahlband

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4220605A1 (de) * 1992-06-24 1994-01-05 Schloemann Siemag Ag Anlage zur Herstellung von warmgewalztem Stahlband
GB2292999A (en) * 1994-09-12 1996-03-13 Davy Mckee Furnace with workpiece stacking
FR2806713B1 (fr) * 2000-03-22 2002-07-26 Bonduelle Sa Ets Enceinte de convoyage de produits, notamment pour le traitement de produits alimentaires
CN104388662B (zh) * 2014-10-27 2016-06-29 中冶南方(武汉)威仕工业炉有限公司 辊底式板材连续回火炉及其回火方法
CN104313295B (zh) * 2014-10-27 2016-06-29 中冶南方(武汉)威仕工业炉有限公司 辊底式板材连续回火炉及其回火方法
CN105063317A (zh) * 2015-08-24 2015-11-18 中国一冶集团有限公司 一种炉辊安装装置及炉辊安装方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3324487A1 (de) * 1983-07-07 1985-01-24 Didier Engineering Gmbh, 4300 Essen Vorrichtung zum erwaermen von waermgut, wie brammen, knueppel o.dgl.
DE3525457A1 (de) * 1985-07-17 1987-01-29 Mannesmann Ag Walzwerk zur herstellung warmgewalzter stahlbaender
EP0264459A1 (fr) * 1986-10-13 1988-04-27 Sms Schloemann-Siemag Aktiengesellschaft Production de bandes laminées à chaud à partir de brames coulées en continu
EP0302257A1 (fr) * 1987-08-05 1989-02-08 DANIELI & C. OFFICINE MECCANICHE S.p.A. Four d'egalisation pour billettes coulées en continu
EP0319808A1 (fr) * 1987-12-05 1989-06-14 Sms Schloemann-Siemag Aktiengesellschaft Appareil pour la coulée continue de bande

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Publication number Priority date Publication date Assignee Title
US3567195A (en) * 1967-06-26 1971-03-02 Ishikawajima Harima Heavy Ind Walking beam continuous heating furnace
DE3708050A1 (de) * 1987-03-12 1988-09-22 Voest Alpine Ag Stranggiessanlage mit nachgeordnetem walzwerk
IT1225544B (it) * 1988-07-26 1990-11-22 Danieli Off Mecc Impianto di laminazione prodotti piani

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3324487A1 (de) * 1983-07-07 1985-01-24 Didier Engineering Gmbh, 4300 Essen Vorrichtung zum erwaermen von waermgut, wie brammen, knueppel o.dgl.
DE3525457A1 (de) * 1985-07-17 1987-01-29 Mannesmann Ag Walzwerk zur herstellung warmgewalzter stahlbaender
EP0264459A1 (fr) * 1986-10-13 1988-04-27 Sms Schloemann-Siemag Aktiengesellschaft Production de bandes laminées à chaud à partir de brames coulées en continu
EP0302257A1 (fr) * 1987-08-05 1989-02-08 DANIELI & C. OFFICINE MECCANICHE S.p.A. Four d'egalisation pour billettes coulées en continu
EP0319808A1 (fr) * 1987-12-05 1989-06-14 Sms Schloemann-Siemag Aktiengesellschaft Appareil pour la coulée continue de bande

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT510468B1 (de) * 2010-09-21 2012-07-15 Voestalpine Stahl Gmbh Durchlaufofen für ein insbesondere metallisches band
AT519697A1 (de) * 2017-03-03 2018-09-15 Primetals Technologies Germany Gmbh Verfahren zur kontinuierlichen Herstellung von Stahlband
AT519697B1 (de) * 2017-03-03 2021-01-15 Primetals Technologies Germany Gmbh Verfahren zur kontinuierlichen Herstellung von Stahlband

Also Published As

Publication number Publication date
AT396559B (de) 1993-10-25
US5205342A (en) 1993-04-27
ATA260090A (de) 1993-02-15
JPH04285112A (ja) 1992-10-09

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