EP0313726A2 - Procédé et four pour le chauffage de brames, billettes, lingots, tôles, bandes d'acier et de charges similaires - Google Patents

Procédé et four pour le chauffage de brames, billettes, lingots, tôles, bandes d'acier et de charges similaires Download PDF

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Publication number
EP0313726A2
EP0313726A2 EP88108487A EP88108487A EP0313726A2 EP 0313726 A2 EP0313726 A2 EP 0313726A2 EP 88108487 A EP88108487 A EP 88108487A EP 88108487 A EP88108487 A EP 88108487A EP 0313726 A2 EP0313726 A2 EP 0313726A2
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EP
European Patent Office
Prior art keywords
furnace
conveyor rollers
heating
heated
furnace chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP88108487A
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German (de)
English (en)
Other versions
EP0313726A3 (en
EP0313726B1 (fr
Inventor
Heinrich Dipl.-Ing. Patalon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Didier Ofu Engineering GmbH
Original Assignee
Didier Engineering GmbH
Didier Ofu Engineering GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19873736674 external-priority patent/DE3736674C1/de
Application filed by Didier Engineering GmbH, Didier Ofu Engineering GmbH filed Critical Didier Engineering GmbH
Priority to AT88108487T priority Critical patent/ATE94274T1/de
Publication of EP0313726A2 publication Critical patent/EP0313726A2/fr
Publication of EP0313726A3 publication Critical patent/EP0313726A3/de
Application granted granted Critical
Publication of EP0313726B1 publication Critical patent/EP0313726B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/38—Arrangements of devices for charging
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • 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
    • 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)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/02—Skids or tracks for heavy objects
    • F27D3/026—Skids or tracks for heavy objects transport or conveyor rolls for furnaces; roller rails
    • 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
    • F27B2009/026—Two or more conveyors, e.g. mounted successively
    • 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
    • F27D2003/0042—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising roller trains
    • F27D2003/0044—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising roller trains at least one of them being removable
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces

Definitions

  • the invention relates to a method for heating slabs, blocks, billets, sheets, steel strips and the like heating material in a heating furnace with a single or multi-zone furnace space, which for the storage and discontinuous transport of the heating material with a roller and hearth or Walking beam system is formed, and a heating furnace suitable for carrying out this method.
  • the heating furnace is used as a secondary furnace for e.g. used upstream walking beam or pusher furnace, so the existing cooling shadows can be removed with the same procedure.
  • reheating to a higher drawing temperature is also possible, which is mainly necessary when heating Si-containing transformer bleaches.
  • roller hearth furnace is therefore advantageous for the method and mode of operation described.
  • high drawing temperatures eg 1300 ° C
  • slab masses eg 1300 ° C
  • the slab masses eg 1300 ° C
  • the usual water cooling of the conveyor rollers within the furnace space causes additional water and energy costs.
  • a compensating furnace between the casting machine and the rolling train for temperature compensation of the cast pieces of heat, in particular steel strips divided by a pendulum shear, for which, for example, a two-zone roller hearth furnace is used.
  • the front furnace area as seen from the casting machine, is designed as a heating zone and the subsequent furnace area as a compensation zone. This often leads to the fact that the heating material is seen unevenly in the heating zone over the length. This has a particularly disadvantageous effect on tapes because of the heating time between the beginning and end of the band is very different. But even with other pieces of heating goods running in a row, the heating irregularities easily occur. Consequently, the subsequent compensation zone of the heating furnace must be designed to be long enough for temperature compensation.
  • the invention has for its object to propose a method which is more economical to use than the known methods and with which the above-described significant costs are avoided or largely reduced, and to provide a suitable heating furnace with which the aforementioned problems are solved.
  • the procedural object is achieved in that the heating material is stored at least when passing through the heating zone of the furnace space in the rest phases during the heating of the heating material on the trestles of a stove or beam system, after which for heating material transport arranged laterally outside the furnace space, transversely to
  • the conveyor axis reciprocating conveyor rollers are moved through furnace wall openings in the furnace chamber to below the material to be heated, so that afterwards the material to be heated is picked up by the conveyor rollers as a result of vertical relative movement between the conveyor rollers and the trestles and transported by their drive in the furnace chamber, that is subsequently as a result vertical relative movement between the conveyor rollers and the trestles the latter pick up the material to be heated again and the conveyor rollers move out of the furnace chamber for the next resting phase.
  • the measure according to the invention enables the conveyor roller table which transports the heat items through the oven space to be moved only discontinuously into the oven space for short dwell times and to be exposed to the heat of the oven space while it is in between, in the longer resting phases in which the heat items are on the trestles of the stove or beam system lie still and be heated, is outside the furnace and is cooled.
  • the usual complex device for water cooling and the energy costs for maintaining it can be saved entirely, since simple air cooling outside the furnace space is sufficient so that it can be operated with simple means.
  • This method also makes it possible to design the lifting system differently and thus to suit the other requirements. So the conveyor rollers be able to be pushed into and out of the furnace chamber from one or both long sides of the heating furnace at a predetermined level, while the trestles of the stove or the beam system can be raised and lowered as lifting elements.
  • the conveyor rollers can also be horizontally and additionally vertically movable both in the manner described above, so that the conveyor rollers are designed as lifting elements, while the trestles represent the fixed parts of the lifting hearth or walking beam system.
  • This last-mentioned method enables the heating goods to be moved forward in a simple manner.
  • the material to be heated is lifted from the conveyor rollers and moved in and across the conveying direction. This is because the conveyor rollers and devices for their operation, which are advantageously arranged on both sides of the furnace for this purpose, easily enable gear arrangements with which the conveyor rollers can be controlled and operated separately.
  • the conveyor rollers which can be moved both horizontally and vertically, can be controlled individually or in pairs in such a way that items of heat that lie on relatively narrow trays running along the furnace transversely to the direction of flow, when placed on the trestles by the conveyor rollers with a short side step offset by the cooling shadow width on the trestles.
  • This lateral displacement of the hot items can during the Oven pass several times in order to achieve a good heating of the hot items in their support area.
  • conveyor rollers which can be moved back and forth transversely to the conveying axis into the furnace space between the raised trestles and below that heating material lying on these trestles are moved so that the trestles then lower and the Conveyor rollers transport the material to be heated along the furnace chamber, after which the trestles are raised again and the conveyor rollers are moved out of the furnace chamber.
  • the heating capacity can be adjusted entirely to the reduced volume of the furnace space and to the throughput and the preheating condition of the items to be heated without significant heat loss.
  • the conveyor rollers or their axes are expediently moved with their freely floating axis ends into a supporting holder in the final phase of their insertion movement into the furnace space.
  • the conveyor rollers are expediently moved into the oven space from both long sides of the heating oven.
  • a further embodiment of the method according to the invention is used, in particular, for the balanced heating of long heating material, for example strip material, in that the heating material first passes through a weakly or not externally heated inlet zone and only then passes through the heating zone with heating and compensation to the final temperature after entry into the furnace chamber .
  • the heating material After leaving the casting system and before entering the heating zone, the heating material is exposed to a temperature-compensating warming process in a pre-furnace room with an inlet zone of the heating furnace, the furnace chamber temperature in this inlet zone not being, or only slightly above, the heating material inlet temperature, better below it.
  • the heating material remains in this inlet zone until the heating zone is completely or at least the length of the heating material pieces free from the previous heating material and is only then transported to the heating zone by rapid transport.
  • the heating material is consequently only exposed to a warming and compensation temperature within this inlet zone.
  • a heating furnace according to claim 10 is preferably used to carry out the method according to the invention.
  • the conveyor rollers can be cooled in accordance with cooling lines, preferably cooling air lines, installed in the end position drawn out of the furnace space from outside the furnace space.
  • either the conveyor rollers in the end position inserted into the furnace space or the heating material trestles can be vertically movable according to claims 12 and 13. In both cases, the arrangement of the conveyor rollers to both Sides or only on one long side outside the furnace space possible.
  • An expedient embodiment of the stove or beam system as well as the conveyor rollers result from the features of claims 14 to 16.
  • the heating furnace can be kept relatively narrow for the implementation of the above-described method, with the trestles of the lifting hearth or walking beam system advantageously being designed to be raised and lowered relative to the conveyor rollers.
  • the conveyor rollers if they are arranged to reciprocate transversely to the heating material conveying direction only on one side outside the furnace space and through the furnace side wall under the heating material until it engages can be inserted into the lifting hearth or walking beam system, can be stored in the opposite furnace side wall in bearing inserts arranged at the level of the conveyor rollers, into which the freely floating axle ends of the conveyor rollers can be inserted.
  • these bearing inserts according to claim 19 consist of a highly stressable refractory, preferably an Al2O3- (high alumina or aluminum oxide) or ZrO2- (zirconium oxide) -containing ceramic.
  • the heating furnaces can be made particularly narrow with only one Space required for the conveyor roller bearings and drives and openings reduced only to this side wall, while the heating furnaces on the other long side are completely closed and can be set up close to other system parts with this side wall.
  • the heating furnace according to claims 10 and 20 is expediently to be equipped with conveyor rollers arranged on both sides of the furnace chamber, the conveyor rollers in the furnace chamber advantageously being approximately up to its longitudinal center extend.
  • a two-zone roller hearth furnace is proposed as particularly advantageous, the furnace space forming only the heating zone being designed according to claim 10 with on both sides or only on one long side of its roller hearth system outside the furnace space arranged conveyor rollers for the heating material.
  • this furnace chamber with the heating zone is preceded by a further furnace chamber, which forms an entry zone, in the manner of a pre-furnace with permanently installed conveyor rollers, this latter pre-furnace chamber having no or only a weakly designed heating device, so that this pre-furnace chamber is kept relatively cool and none at all or only requires minor measures to cool the roller tables.
  • Such a system is economical to manufacture and maintain, because the conveyor roller table in the inlet zone does not require any special effort, as mentioned above, and the possible heating costs for the warming and temperature compensation process within this inlet zone can be neglected, since the furnace space is predominantly of the incoming hot material is heated. As a rule, good fiber insulation of the furnace housing in the inlet zone is sufficient.
  • FIG. 1 to 6 a heating furnace with conventional burner heating is shown. Its furnace chamber 10 extends longitudinally between two side walls 11 or 11a and 11b and the opposite end walls with closable openings 12. Devices, not shown, are used for inserting and removing the hot items 13 through these end openings 12.
  • a roller-type hearth system with vertically movable ceramic supports 14 of a lifting hearth is used for the support and the discontinuous transport of the hot items 13 lengthwise through the furnace chamber 10.
  • Conveyor rollers 15 serve as its fixed, ie remaining at a constant height, storage elements but can be moved horizontally. The vertical relative movement between the conveyor rollers 15 and the trestles 14 takes place discontinuously at predetermined time intervals.
  • the conveyor rollers 15 are arranged with their storage and gear boxes 16 and their drive devices 17 in two rows on both sides of the furnace chamber 10 on the outside of the furnace side walls 11 and each can be moved back and forth transversely to the direction of conveyance of the heating material.
  • the two side walls 11 have openings 18 at the height of the conveyor rollers 15 which are adapted in diameter and which, when the conveyor rollers 15 are extended, are largely closed by their end faces 23 of the conveyor rollers 15 remaining at the level of the outer edge 29 of the openings 18.
  • the conveyor rollers 15 are briefly passed through a pushing device 19 emerging from the gearbox 16 on support arms 20 with roller guide through the open openings 18 for engagement in the lifting hearth system in the furnace chamber 10 under the raised hot items 13. and moved out of the furnace chamber 10 after the conveying of the hot material pieces 13.
  • rotary drive for the conveyor rollers 15 causes them to be actuated only briefly as soon as they are pushed under the hot material pieces 13 and these carry the hot material 13 after lowering the trestles 14 of the lifting hearth.
  • the Items of warmth 13 are transported by the conveyor rollers 15 a predetermined step and again taken over by the again raised trestles 14, so that the conveyor rollers 15 can be moved out of the furnace chamber 10 again for the time of the next heating phase.
  • the rotary movement of the conveyor rollers 15 or a separate fan can provide air cooling for the conveyor rollers 15.
  • the hot goods storage trays 14 of the lifting hearth are divided into sections with gaps 21 over the length of the hearth system, in which the conveyor rollers 15 engage for receiving and transporting the hot goods 13.
  • the mode of operation is as follows:
  • the conveyor rollers 15 For the transport of the heating material 13, the conveyor rollers 15 with their free end faces 23 in front of the outer edge 29 of the openings 18 are in their longitudinal axis direction into the furnace chamber 10 between two Trestles 14 of the lifting hearth moved to below the heating material 13 and held in the end positions.
  • the trestles 14 are lowered and gently place the heat material 13 on the conveyor rollers 15 in creep speed.
  • the conveyor roller system is resiliently mounted with sufficient space for movement, so that each conveyor roller 15 grips and supports the heating material 13.
  • the rotary movement of the conveyor rollers 15 is initiated by the drive 17.
  • the doors 24 of the end openings 12 are briefly raised for the removal on the one hand and the input of a heat item 13 or a heat gas batch on the other hand.
  • the opposite conveyor rollers 15 can be assigned to different movement sections within the furnace length.
  • a control determines for each section whether the heating material 13 there remains on the conveyor rollers 15 or is moved, e.g. for decharging individual hot items 13.
  • the heat material transport time is generally only about 5 to 35 seconds.
  • the conveyor rollers 15 are only slightly heated, so that their resting time outside the furnace space 10 is usually sufficient for air cooling of the rollers 15. Water cooling may only be necessary in special cases, but may then also be used outside the furnace chamber 10. In any case, the energy and cooling costs of the conveyor rollers 15 are greatly reduced compared to the known methods, because only a short residence time per hour in the hot furnace chamber 10 is required.
  • the low roller heating results in good stability, because roller temperatures of up to 1100 ° C, as are inevitable with the known roller hearth furnaces, no longer occur.
  • FIGS. 3 and 4 enables the material to be heated 13 to be heated and equalized particularly uniformly if, instead of the vertically movable storage stands 14 of the hearth, the conveyor rollers 25 are not only vertically movable not only in the horizontal plane but also in the inserted end position .
  • the material to be heated 13 is lifted with the aid of the conveyor rollers 25 shown here from the immovable trestles 26. If the conveyor rollers 25 are even individually movable in height according to FIG. 4, it is easily possible to move them individually or in pairs To control lateral movement so that they lie transversely to the conveying direction of hot material pieces 13 when they are reinserted on the fixed trestles 14 by the lateral displacement of the cooling shadow and enable its heating.
  • the heating furnace is fed with relatively narrow blocks or billets 13, these are often placed in the longitudinal direction of the furnace space 10 on immovable support blocks 26 of a beam system, as shown in FIG. 5.
  • the trestles 26 then extend transversely to the conveying direction of the heating material 13.
  • the lifting and lowering conveyor rollers 25 are expediently provided with annular guide grooves 27 which correspond in width to the width of the heating material.
  • the number of guide grooves 27 per conveyor roller 25 is advantageously adapted to the number of push-back positions of the conveyor roller 25.
  • FIG. 5 shows how a heated block 13 is grasped and raised with the one guide groove 27 of the conveyor rollers 25 in order to convey it out through the one end-side furnace chamber opening 12, while the further blocks 13 still remain in the furnace chamber 10.
  • one or all openings 18 are one for each opening 18 on the outer sides of the side walls 11
  • Side wall 11 a continuous door 28 is arranged, with which the openings 18 are closed during the heating phases when the conveyor rollers 25 are extended.
  • FIG. 6 shows a fourth embodiment of the proposed heating furnace with a furnace space 10, the height and width of which are largely designed for the cross-sectional dimensions of the heating material pieces 13.
  • the hot items 13, e.g. Thin slabs each lie in a row one behind the other on the conveyor rollers 40 which have been moved in between the trestles 14 of the lifting hearth, while the trestles 14 are lowered.
  • the conveyor rollers 40 which are divided over the entire length of the furnace space 10 in alternation with the trestles 14, are held by the support arms with roller guide 20 on only one, that is to say on the same side outside of the furnace space 10 next to the one heating furnace side wall 11a. Drives, not shown, move the conveyor rollers 40 through the open openings 18 of this one side wall 11a of the heating furnace into the furnace space 10 into the position shown below the items to be heated 13. After the trestles 14 have been lowered, these are then moved for a short length by a rotary movement of the conveyor rollers 40 conveyed through the furnace chamber 10 with the respective removal of a heat item 13 on the removal side of the heating furnace.
  • bearing inserts 42 are stored in bearing inserts 42 opposite second side wall 11b of the heating furnace.
  • These bearing inserts 42 consist of a heavy-duty refractory for which an Al2O3- (high alumina or aluminum oxide) -containing or ZrO2- (zirconium oxide) -containing ceramic is proposed.
  • These bearing inserts 42 are walled in in the second side wall 11b exactly opposite the openings 18 of the first side wall 11a of the heating furnace and have circular recesses 43 at the level of the axis ends 41 of the conveyor rollers 40, which are only open on the inside and into which the conveyor rollers 40 are supported on this side whose axis ends 41 are inserted and, as shown in FIG. 6, held in position. It goes without saying that the different thermal expansion behavior must be taken into account by a sufficient tolerance in the diameters of the recess 43 and the axle end 41.
  • the drive devices, not shown, for the conveyor rollers 40 move them immediately after the conveying movement and the renewed takeover of the hot items 13 by the now raised trestles 14 again from the furnace chamber 10, that is to say from the position shown into the rest position outside the furnace chamber 10 18 closed by lowering the doors 28 and the material to be heated 13 rests on the trestles 14 until the next conveying step, for which the conveying rollers 40 are again moved into the furnace chamber 10.
  • the conveyor rollers 40 For the treatment, for example from stress relief annealing to high-temperature heating, of relatively light-weight strip material, it may be sufficient to mount the conveyor rollers 40 only on one long side of the heating furnace, so that the support bearings that are possible with respect to the openings 18, e.g. the bearing inserts 42 can be dispensed with.
  • FIG. 7 shows a further development of the invention based on an exemplary embodiment for a two-zone heating furnace which is suitable for the heat treatment of steel strips. Shown is a vertical longitudinal section through a two-zone heating furnace consisting of two furnace sections A and B with a continuous roller hearth system.
  • a roller hearth pre-oven space 30 is connected upstream of a roller hearth furnace space 10, for example in the construction of FIGS. 1 and 2, forming the heating zone, as the entry zone.
  • the roller-hearth furnace section A has a conventional burner heating which is suitable for heating up to a temperature of at least 1300 ° C.
  • the furnace chamber 10 extends longitudinally between two side walls and opposing end walls with openings 12 that can only be closed to one side.
  • the heating goods 13 are steel strip sections and are transported by devices of a roller-type hearth system 14, 15 already described above and then removed from a removal device, not shown, through the outlet-side opening 12.
  • the roller-type hearth system has the vertically movable ceramic support blocks 14 of the hearth, already described for the above exemplary embodiments, and conveyor rollers 15 and 40, respectively, as its fixed storage elements, which can only be moved horizontally .
  • These conveyor rollers 15 and 40 are arranged with their storage and gear boxes, not shown here, and in their drive devices, depending on the width of the steel belt and the furnace chamber, in a row on one side or in two rows on both sides of the furnace chamber 10 on the outside of the furnace side walls .
  • the conveyor rollers 15 and 40 are transversely to the heating material conveying direction through the openings of one or both side walls of the heating furnace for a short time to engage in the lifting hearth system into the furnace chamber 10 and after the heating material pieces are conveyed again out of the furnace chamber 10 moved out.
  • the heating material 13, in this case the steel strip sections runs in the direction of the arrow longitudinally through the heating zone in the furnace chamber 10.
  • the roller-hearth furnace section A described above is preceded by a roller-hearth furnace section B with a pre-furnace chamber 30, which forms the inlet zone.
  • This pre-furnace space 30 contains a stationary conveyor roller conveyor 31, on which the heat material 13 entering through the front entry opening 32 runs lengthways the inlet zone in the pre-furnace space 30 is led into the subsequent heating zone in the furnace space 10.
  • This inlet zone is kept relatively cool.
  • Their pre-furnace space 30 has only a few heating burners 33 for maintaining a uniform temperature, which corresponds approximately to the inlet temperature of the heating material 13 or is somewhat below it.
  • a good temperature compensation is thus achieved beforehand, before a piece of heat 13 is again transported into this furnace chamber 10, that is to say from the inlet zone into the heating zone, after a decharging process through the removal opening 12 and thus partial or complete emptying of the furnace chamber 10 with a rapid conveying movement it is then heated to the final temperature for further processing.
  • a scissor 34 is connected upstream of the pre-furnace space B (inlet zone), which cuts the steel strip arriving from a casting installation (not shown) to a suitable section length and thus separates the hot items 13.
  • partition walls 35 Between the furnace sections A and B there are partition walls 35 with the corresponding end openings 12 for the passage of the heating material pieces 13.
  • the partition walls 35 are mutually thermally insulated by an insulating fiber intermediate layer 36, which at the same time connects the through holes 12 for the heating material pieces 13 that connect the two zones all around tightly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Tunnel Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
EP88108487A 1987-10-29 1988-05-27 Procédé et four pour le chauffage de brames, billettes, lingots, tôles, bandes d'acier et de charges similaires Expired - Lifetime EP0313726B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88108487T ATE94274T1 (de) 1987-10-29 1988-05-27 Verfahren und ofen zum waermen von brammen, bloecken, knueppeln, blechen, stahlbaendern und dergleichen waermgut.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19873736674 DE3736674C1 (en) 1987-10-29 1987-10-29 Method and furnace for heating slabs, ingots, billets, sheets and similar products
DE3736674 1987-10-29
DE19873738755 DE3738755A1 (de) 1987-10-29 1987-11-14 Verfahren und anlage zum waermen von brammen, bloecken, knueppeln, blechen, stahlbaendern und dergleichen waermgut
DE3738755 1987-11-14

Publications (3)

Publication Number Publication Date
EP0313726A2 true EP0313726A2 (fr) 1989-05-03
EP0313726A3 EP0313726A3 (en) 1990-04-25
EP0313726B1 EP0313726B1 (fr) 1993-09-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP88108487A Expired - Lifetime EP0313726B1 (fr) 1987-10-29 1988-05-27 Procédé et four pour le chauffage de brames, billettes, lingots, tôles, bandes d'acier et de charges similaires

Country Status (3)

Country Link
EP (1) EP0313726B1 (fr)
DE (2) DE3738755A1 (fr)
ES (1) ES2045011T3 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2655894A1 (fr) * 1989-12-19 1991-06-21 Stein Heurtey Dispositif de stockage de produits metallurgiques, tels que brames minces.
GB2263875A (en) * 1992-02-06 1993-08-11 Didier Ofu Eng A process for heating thin metallic sheet and a furnace for carrying out the process
WO1994021381A1 (fr) * 1993-03-19 1994-09-29 Claudius Peters Aktiengesellschaft Dispositif pour le concassage et le refroidissement d'un materiau sortant d'un fourneau
GB2317679A (en) * 1996-09-26 1998-04-01 Riedhammer Gmbh Co Kg Firing shelf and charging device for ceramics
DE19723692C2 (de) * 1996-06-05 2000-11-23 Eisenmann Kg Maschbau Verfahren zum Brennen von Ziegeln in einem Rollen-Brennofen sowie Brennofen zur Verfahrensdurchführung
DE19928457C1 (de) * 1999-06-24 2001-01-04 Riedhammer Gmbh Co Kg Tunnelofen mit Scheibenradförderung
DE102006020781B3 (de) * 2006-05-03 2007-11-22 Benteler Automobiltechnik Gmbh Ofen
WO2010095032A1 (fr) * 2009-02-23 2010-08-26 Extrutec Gmbh Dispositif de préchauffage d'objets, en particulier de tubes, de barres ou de goujons en aluminium, ainsi qu'installation dotée d'un tel dispositif de préchauffage
CN105115307A (zh) * 2015-09-16 2015-12-02 中冶南方工程技术有限公司 速冷机构及其控制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE661139C (de) * 1936-02-15 1938-06-11 Hoesch Akt Ges Rollenfoerderer fuer die Foerderung von Blechen und Baendern durch Waermeoefen
LU41760A1 (fr) * 1961-06-20 1962-07-23
DE2151637A1 (de) * 1971-10-16 1973-04-26 Thermo Engineering Gmbh Industrieofen, insbesondere fuer die waermebehandlung von blechen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE661139C (de) * 1936-02-15 1938-06-11 Hoesch Akt Ges Rollenfoerderer fuer die Foerderung von Blechen und Baendern durch Waermeoefen
LU41760A1 (fr) * 1961-06-20 1962-07-23
DE2151637A1 (de) * 1971-10-16 1973-04-26 Thermo Engineering Gmbh Industrieofen, insbesondere fuer die waermebehandlung von blechen

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0434487A1 (fr) * 1989-12-19 1991-06-26 Stein Heurtey Dispositif de stockage de produits métallurgiques, tels que brames minces
US5075953A (en) * 1989-12-19 1991-12-31 Stein-Heurtey Method of and apparatus for storing products from continuous casting lines prior to rolling
FR2655894A1 (fr) * 1989-12-19 1991-06-21 Stein Heurtey Dispositif de stockage de produits metallurgiques, tels que brames minces.
GB2263875A (en) * 1992-02-06 1993-08-11 Didier Ofu Eng A process for heating thin metallic sheet and a furnace for carrying out the process
DE4203395A1 (de) * 1992-02-06 1993-08-19 Didier Ofu Eng Verfahren zum aufheizen von duennbrammen, blechen und stahlbaendern und dergleichen waermgut in hochtemperatur-rollenherdoefen, hubbalkenoefen oder aehnlichen ofenanlagen und oefen zur durchfuehrung des verfahrens
GB2263875B (en) * 1992-02-06 1995-04-19 Didier Ofu Eng A process for heating thin sheets of metallic material and a furnace for carrying out said process
WO1994021381A1 (fr) * 1993-03-19 1994-09-29 Claudius Peters Aktiengesellschaft Dispositif pour le concassage et le refroidissement d'un materiau sortant d'un fourneau
US5580005A (en) * 1993-03-19 1996-12-03 Claudius Peters Aktiengesellschaft Arrangement for crushing and cooling material passing out of a firing oven
DE19723692C2 (de) * 1996-06-05 2000-11-23 Eisenmann Kg Maschbau Verfahren zum Brennen von Ziegeln in einem Rollen-Brennofen sowie Brennofen zur Verfahrensdurchführung
GB2317679A (en) * 1996-09-26 1998-04-01 Riedhammer Gmbh Co Kg Firing shelf and charging device for ceramics
GB2317679B (en) * 1996-09-26 2000-07-26 Riedhammer Gmbh Co Kg A loading and unloading device for a firing shelf
DE19928457C1 (de) * 1999-06-24 2001-01-04 Riedhammer Gmbh Co Kg Tunnelofen mit Scheibenradförderung
DE102006020781B3 (de) * 2006-05-03 2007-11-22 Benteler Automobiltechnik Gmbh Ofen
US7704447B2 (en) 2006-05-03 2010-04-27 Benteler Automobiltechnik Gmbh Multi-deck furnace
WO2010095032A1 (fr) * 2009-02-23 2010-08-26 Extrutec Gmbh Dispositif de préchauffage d'objets, en particulier de tubes, de barres ou de goujons en aluminium, ainsi qu'installation dotée d'un tel dispositif de préchauffage
CN105115307A (zh) * 2015-09-16 2015-12-02 中冶南方工程技术有限公司 速冷机构及其控制方法
CN105115307B (zh) * 2015-09-16 2017-07-11 中冶南方工程技术有限公司 速冷机构及其控制方法

Also Published As

Publication number Publication date
DE3738755A1 (de) 1989-06-01
DE3883912D1 (de) 1993-10-14
ES2045011T3 (es) 1994-01-16
EP0313726A3 (en) 1990-04-25
EP0313726B1 (fr) 1993-09-08

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