EP0264459B1 - Production of hot-rolled steel strip from continuously cast slabs - Google Patents

Production of hot-rolled steel strip from continuously cast slabs Download PDF

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Publication number
EP0264459B1
EP0264459B1 EP86114160A EP86114160A EP0264459B1 EP 0264459 B1 EP0264459 B1 EP 0264459B1 EP 86114160 A EP86114160 A EP 86114160A EP 86114160 A EP86114160 A EP 86114160A EP 0264459 B1 EP0264459 B1 EP 0264459B1
Authority
EP
European Patent Office
Prior art keywords
cast strand
rolling
furnace
partial pieces
storage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86114160A
Other languages
German (de)
French (fr)
Other versions
EP0264459A1 (en
Inventor
Wolfgang Dr. Rohde
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.)
Sms Schloemann Siemag AG
Original Assignee
Sms Schloemann Siemag AG
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8195492&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0264459(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sms Schloemann Siemag AG filed Critical Sms Schloemann Siemag AG
Priority to AT86114160T priority Critical patent/ATE46463T1/en
Priority to DE8686114160T priority patent/DE3665680D1/en
Priority to ES86114160T priority patent/ES2010653B3/en
Priority to EP86114160A priority patent/EP0264459B1/en
Priority to IN693/MAS/87A priority patent/IN170196B/en
Priority to SU874203392A priority patent/RU1801056C/en
Priority to ZA877351A priority patent/ZA877351B/en
Priority to US07/103,529 priority patent/US4829656A/en
Priority to DD87307512A priority patent/DD262375A5/en
Priority to CA000549432A priority patent/CA1318578C/en
Priority to MX008737A priority patent/MX169996B/en
Priority to BR8705427A priority patent/BR8705427A/en
Priority to KR1019870011252A priority patent/KR940007167B1/en
Priority to JP62257045A priority patent/JP2664379B2/en
Priority to CN87106902A priority patent/CN1023451C/en
Publication of EP0264459A1 publication Critical patent/EP0264459A1/en
Publication of EP0264459B1 publication Critical patent/EP0264459B1/en
Application granted granted Critical
Priority to GR89400225T priority patent/GR3000205T3/en
Priority to LV930744A priority patent/LV5599A3/en
Priority to LTRP1015A priority patent/LT2522B/xx
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • 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
    • 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
    • B21B1/22—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 plates, strips, bands or sheets of indefinite length
    • B21B1/24—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • 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
    • B21B1/22—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 plates, strips, bands or sheets of indefinite length
    • B21B1/30—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 plates, strips, bands or sheets of indefinite length in a non-continuous process
    • B21B1/32—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
    • B21B1/34—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 plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work by hot-rolling
    • 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
    • B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
    • B21B2001/028—Slabs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product
    • 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

Definitions

  • the invention relates to a method for producing hot-rolled steel strip from pre-material which has already been strip-shaped, in which parts of the same length are first separated from the cast strand which has solidified after casting, then these parts are successively transferred to a furnace with a stretched length and stored in the furnace and at the rolling temperature are brought and held, in which a larger number of cast strand sections are pre-produced and stored until the start of rolling and individual cast strand sections are successively introduced at a rolling temperature into a rolling mill for rolling, and in which the continuous casting is continuously continued even during the rolling operation and the cast strand sections thus formed are introduced into the furnace for storage until they are rolled.
  • the invention also relates to a plant for carrying out this method, which consists of a continuous casting plant for the continuous casting of a band-shaped cast strand, of a cross-section device for dividing the solidified cast strand into cast strand sections and of a temperature compensation and storage furnace with transverse transport for receiving the cast strand.
  • a plant for carrying out this method which consists of a continuous casting plant for the continuous casting of a band-shaped cast strand, of a cross-section device for dividing the solidified cast strand into cast strand sections and of a temperature compensation and storage furnace with transverse transport for receiving the cast strand.
  • sections of elongated length which contains a plurality of storage locations for cast strand sections which can be operated by the transverse transport.
  • a certain number of cast strand sections can be deposited in the other half of the storage furnace by moving them from the center of the furnace to a transverse transport on the other side of the furnace. After the interruption has ended, the additionally stored continuous casting sections can then be gradually returned to the normal material flow to the rolling mill.
  • the invention aims to provide a method for producing hot-rolled steel strip of the known type described above and a system for carrying out this method, with or by which the rolling out of the steel strip can take place using cast strand sections, which not only Have a constant temperature profile over their entire length, resulting in a high-quality end product. Rather, it should also be achieved that the cast strand sections continuously produced by the continuous casting plant during a standstill of the downstream rolling mill in the overall system can be introduced into the furnace without problems and stored therein until normal rolling operation begins again.
  • this object is achieved in that, according to the characterizing part of claim 1, the cast strand sections separated from the cast strand are only introduced directly into the furnace and stored therein with transverse transport, in that the furnace is operated essentially without additional energy supply and the cast strand -Tiles are stored therein over a period of time which corresponds to a multiple, for example four times their casting time, but that the rolling of each individual cast strand section is carried out in a time unit which is only a fraction, for example one fifth corresponds to its casting time, and that the rolling is carried out discontinuously and the rolling process is interrupted with a pause for a period of time which corresponds to the difference between a casting time and a rolling time.
  • the process steps indicated advantageously ensure that each casting strand section remains in the furnace for a relatively long period between the end of the casting process and the beginning of the rolling cycle and as a result practically without additional energy being supplied from the solidification temperature of the casting strand to the required one within this period Rolling temperature of the cast strand sections brought and also held on this. Since between the storage and the start of rolling there is always a larger number of cast strand sections with a stretched length in the furnace, a temperature profile that is practically uniform over the entire length is obtained, especially since the cast strand sections from the continuous casting system also during the rolling operation can reach the oven.
  • assembly times on the rolling mill for example the roll changes, are placed in the pause times of the rolling cycles and, if necessary, the pause times of two rolling cycles are placed directly one behind the other, and that the cast strand sections formed during these pause times are additionally placed in the furnace introduced and stored in it.
  • Break times of about 10 minutes between successive rolling cycles are usually sufficient to carry out the assembly work (roll change) required on the rolling mill. Only if it turns out that an available pause time is not completely sufficient for the completion of the assembly work, then two pause times can advantageously be lined up directly, to which two rolling times can then be directly lined up to subsequently achieve the normal course of further rolling cycles.
  • a system for carrying out the method explained in detail above consists of a continuous casting system for the continuous casting of a band-shaped cast strand, of a cross-dividing device for dividing the solidified cast strand into cast strand sections and of a temperature compensation and storage furnace with transverse transport for receiving the cast strand sections in stretched length, which contains a plurality of storage locations for cast strand sections which can be operated by the transverse transport.
  • the storage furnace with its transverse transport is set up for direct loading with cast strand sections from the continuous casting installation, that it has the first storage location of the transverse transport axis alignment with the continuous casting installation, while at the last storage location of the transverse transport via one Abrollrollgang the rolling mill is connected, and that the number of storage spaces for cast strand sections on the transverse transport is matched to the difference between their necessary residence time in the furnace to the casting time for a single cast strand section.
  • the storage furnace has at least four according to the ratio 4: 1 Storage locations for cast strand sections.
  • the storage furnace contains, in addition to the storage locations for continuous casting sections on the transverse transport, buffer storage locations for continuous casting sections, which are in continuous operation of the continuous casting system during extended downtimes of the rolling mill between the rolling times of two successive rolling cycles, cast iron sections can also be fed in extended lengths.
  • the storage locations are essentially horizontally next to one another in the storage furnace, while the buffer storage locations are arranged one above the other in the vertical direction and are positioned laterally of the storage locations.
  • the buffer storage spaces within the storage furnace can be set individually one after the other on the transport level of the cast strand sections and the storage spaces.
  • the cast strand sections produced during the necessary, extended downtimes of the rolling mill with continuous operation of the continuous casting plant can be taken up with relatively little additional effort and space without affecting the storage spaces in the storage furnace and can be completely eliminated after the rolling mill downtime has ended by appropriately increasing successive rolling cycles Roll out to the steel strip without any problems, because then - with the same rolling time - the successive rolling cycles are shortened by reducing their break times accordingly.
  • the number of buffer storage spaces is provided at least equal to the number of storage storage spaces in the storage furnace.
  • a transfer device for individual cast strand sections is provided between the longitudinal transport for the individual cast strand sections, the transverse transport of the storage storage spaces and the buffer storage spaces, which then comes into operation , if cast strand sections have to be taken over from the longitudinal transport into the buffer storage locations or are to be transferred from these to the transverse transport for the storage storage locations.
  • the rolling mill downstream of the storage furnace is designed as a continuous finishing train.
  • This continuous finishing train can be equipped with normal finishing stands as well as with compact finishing stands.
  • the rolling mill downstream of the storage furnace is designed as a reversing stand, in particular as a Steckel rolling mill, with coil reel or reel furnaces on the outlet and inlet side.
  • a reversing stand in particular as a Steckel rolling mill, with coil reel or reel furnaces on the outlet and inlet side.
  • the system for producing hot-rolled steel strip has a continuous casting machine 1, at the output of which a roller table 2 connects, to which a flame cutting machine 3 is assigned as a cross-cutting device for dividing the cast strand 4.
  • the liquefied material for forming the cast strand 4 is cooled in the sheet guide of the continuous casting machine.
  • the outlet temperature of the cast rod 4 at the end of the sheet guide is still above 1150 ° C.
  • the solidified cast strand 4 runs from the roller table 2 into a storage oven 5 at a temperature of approximately 1150 ° C. and is initially taken up by a roller conveyor adjacent to the roller table 2.
  • the cast strand 4 is divided by the flame cutting machine 3 into cast strand sections 4a of a predetermined length, for example of 50 meters.
  • the cast strand sections 4a retracted into the storage furnace 5 are then moved step by step by means of a transverse transport 6 within the storage furnace 5 and transversely to their longitudinal direction, the transverse transport 6 having a plurality, for example four, of storage spaces adjacent to one another at a distance.
  • the first of these storage locations is located in the storage oven 5 in the axial alignment with the roller table 2, while the last storage location in the axial alignment is provided with a roller table 7 downstream of the storage oven 5.
  • the roller conveyor 7 is assigned a roller conveyor, with the help of which the cast strand section 4a brought to the last storage location by the transverse transport 6 can be brought from the storage oven 5 onto the roller conveyor 7.
  • the continuous casting machine 1 needs a casting time of 12.5 minutes for the formation of a casting strand 4 with a length dimension of 50 meters corresponding to a casting strand section 4a, then it follows that the transverse transport 6 within the storage furnace 5 in each case Intervals of 12, 5 minutes must be carried out a transport step and that the passage time of each cast strand section 4a through the storage furnace 5 is about 50 minutes before it is transferred to the roller table 7. Shorter throughput times can also be set using idle cycles.
  • the individual cast strand sections 4a are brought to an outlet temperature of approximately 1050 ° C. - the rolling temperature - while maintaining their elongated length relative to the inlet temperature at 1150 ° C.
  • the temperature reduction by approximately 100 ° C. can take place within the storage furnace 5 practically without any external energy supply, the temperature profile in the longitudinal direction of the individual cast strand sections being very uniform.
  • the individual cast strand sections 4a are first passed through a descaling station 8 and then reach a continuous finishing train 9, which comprises, for example, six four-high finishing stands.
  • a cooling section 10 adjoins the continuous finishing train 9 and is effective in the area of a transport roller table 11. From the transport roller table 11, the finished rolled steel strip 12 is fed to a take-up reel 14 via a driving device 13 and is wound by the latter into a coil.
  • the roller conveyor in the storage oven 5 assigned to the last storage location of the transverse transport 6 can be designed as a pendulum roller table, with the aid of which the cast strand section 4a located thereon can be moved back and forth within the storage oven 5 to a limited extent as required in the longitudinal direction.
  • each individual rolling cycle comprises a pause time of approximately 10 minutes, during which the continuous finishing train 9 and consequently also all parts of the plant downstream of it can go out of operation.
  • the continuous operation of the continuous casting machine 1 must also be interrupted. I.e. the cast strand sections 4a produced by the continuous casting machine 1 during the extended downtime of the system parts arranged downstream of the storage furnace 5 must additionally be accommodated in the storage furnace 5 without the operation of the transverse transport 6 having or forming the storage locations being impaired in any way.
  • the storage furnace 5 is also equipped with buffer storage locations 15 for a larger number of cast strand sections 4b which are located in a region of the storage furnace 5. which lies to the side of the area containing the transverse transport 6.
  • the buffer storage locations 15 are arranged one above the other in the vertical direction, in such a way that they can be adjusted individually and in succession on the transport plane of the roller table 2 for the cast strand sections 4a and 4b by means of a lifting device 16.
  • a special transfer device is provided between the runway arranged in the area of the transverse transport 6 and in extension to the roller table 2 and the buffer storage locations 15 within the storage oven 5.
  • This for example, like the transverse transport 6, can be designed as a walking beam transport device.
  • the walking beam transport device of the transverse transport 6 only needs to be designed such that it effects transport steps in only one transport direction, in the case of the transfer device assigned to the buffer storage locations 15, it is necessary to provide a design with which two transport directions that are opposite to one another are optionally available can be mastered.
  • the transfer device While it is necessary to carry out transport steps from the transverse transport 6 to the buffer storage spaces 15 in order to load the buffer storage spaces 15 with cast strand sections 4b, the transfer device must later transport movements to the transverse transport 6 in order to empty the buffer storage spaces 15 later run out.
  • the number of buffer storage spaces 15 in the storage furnace 5 is made at least equal to the number of them Select storage locations.
  • the number of buffer storage locations 15 is selected to be even larger than that of the storage storage locations. This is because there are five buffer storage locations 15 with four storage locations.
  • two cast strand sections 4a and 4b can be made if the pause times are shortened to 3.75 minutes roll out and thus take over from the buffer storage locations 15 to the storage locations of the transverse transport 6 in the storage furnace 5.
  • FIGS. 4 to 6 differs from that of FIGS. 1 to 3 basically only in that the storage furnace 5 instead of a continuously working finishing train 9 with four-high mill stands assigned a four-high mill stand 17 with reversing operation which works as a Steckel mill with an outlet-side coil reel or reel furnace 18 and an inlet-side coil reel or reel furnace 19.
  • Continuous casting machine 1 and storage furnace 5 are completely identical in construction and mode of operation with the system according to FIGS. 1 to 3.

Abstract

1. Method for the production of hot-rolled steel strip from starting material continuously cast already in strip shape, in which method partial pieces (4a or 4b) of equal length are initially severed from the cast strand (4) rigidified after the casting, these partial pieces (4a, 4b) are then transferred one after the other with stretched length into a furnace (5) and stored in this as well as brought to and maintained at rolling temperature, in which method a greater number of cast strand partial pieces (4a and 4b) is preliminarily produced and stored until the beginning of rolling and individual cast strand partial pieces (4a and 4b) are introduced one after the other at rolling temperature into a rolling mill for rolling-down and in which method the continuous casting (1) is continuously continued also during the rolling operation as well as the cast strand partial pieces (4a and 4b) then formed introduced into the furnace for storage until rolling, characterised thereby, that the cast strand partial pieces (4a and 4b) severed from the cast strand (4) are exclusively introduced directly into the furnace (5) and stored therein subject to transverse transport (6), that the furnace (5) is in that case operated substantially without additional energy supply and the cast strand partial pieces (4a and 4b) are stored therein over a period which corresponds to a multiple of, for example four times their casting time, that the rolling of each individual cast strand partial piece (4a and 4b) is however carried out in a time unit which corresponds to only a fraction, for example one fifth of its casting time and that the rolling is carried out discontinuously and the rolling operation is in that case each time interrupted by an interval time over a period which corresponds to the difference between a casting time and a rolling time.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von warmgewalztem Stahlband aus bereits bandförmig stranggegossenem Vormaterial, bei welchem von dem nach dem Gießen erstarrten Gußstrang zunächst Teilstücke gleicher Länge abgetrennt werden, dann diese Teilstücke nacheinander mit gestreckter Länge in einen Ofen übergeben und in diesem gespeichert sowie auf Walztemperatur gebracht und gehalten werden, bei welchem bis zum Walzbeginn eine größere Anzahl von Gußstrang-Teilstücken vorproduziert und gespeichert wird und einzelne Gußstrang-Teilstücke nacheinander mit Walztemperatur zum Auswalzen in ein Walzwerk eingeführt werden, und bei welchem das Stranggießen auch während des Walzbetriebes kontinuierlich fortgesetzt wird sowie die dabei gebildeten Gußstrang-Teilstücke in den Ofen zur Speicherung bis zur Walzung eingeführt werden.The invention relates to a method for producing hot-rolled steel strip from pre-material which has already been strip-shaped, in which parts of the same length are first separated from the cast strand which has solidified after casting, then these parts are successively transferred to a furnace with a stretched length and stored in the furnace and at the rolling temperature are brought and held, in which a larger number of cast strand sections are pre-produced and stored until the start of rolling and individual cast strand sections are successively introduced at a rolling temperature into a rolling mill for rolling, and in which the continuous casting is continuously continued even during the rolling operation and the cast strand sections thus formed are introduced into the furnace for storage until they are rolled.

Die Erfindung betrifft aber auch eine Anlage zur Durchführung dieses Verfahrens, welche aus einer Stranggießanlage zum kontinuierlichen Gießen eines bandförmigen Gußstranges, aus einer Querteilvorrichtung zum Unterteilen des erstarrten Gußstranges in Gußstrang-Teilstücke und aus einem Temperaturausgleichs- und Speicherofen mit Quertransport für die Aufnahme der Gußstrang-Teilstücke in gestreckter Länge besteht, der eine Mehrzahl von durch den Quertransport bedienbare Speicherplätze für Gußstrang-Teilstücke enthält.However, the invention also relates to a plant for carrying out this method, which consists of a continuous casting plant for the continuous casting of a band-shaped cast strand, of a cross-section device for dividing the solidified cast strand into cast strand sections and of a temperature compensation and storage furnace with transverse transport for receiving the cast strand. There are sections of elongated length which contains a plurality of storage locations for cast strand sections which can be operated by the transverse transport.

Durch die DE-A 3 310 867 ist es bereits bekannt, aus einem stranggegossenen Vormaterial warmgewalztes Stahlband in unmittelbar aufeinanderfolgenden Arbeitssschritten herzustellen, solange - im Normalbetrieb - die Stranggießproduktion und die Walzproduktion übereinstimmen. In diesem Falle wird der von der Stranggießanlage kommende Gußstrang zunächst in Teilstücke gleicher Länge getrennt, anschließend aus der Gießlinie querverschoben und dann über einen Rollgang mittig in einen Speicherofen eingeführt. Innerhalb des Speicherofens werden dann die Gußstrang-Teilstücke über einen Hubbalkenförderer von der Ofenmitte in Richtung zu einer Ofenseite hin transportiert, von wo sie dann, wiederum über einen Rollgang, in das Walzwerk gelangen, welches dabei als Hochverformungswalzgerüst ausgelegt ist.From DE-A 3 310 867 it is already known to produce hot-rolled steel strip from a continuously cast starting material in immediately successive steps, as long as - in normal operation - the continuous casting production and the rolling production match. In this case, the cast strand coming from the continuous caster is first separated into sections of the same length, then shifted out of the casting line and then inserted centrally into a storage furnace via a roller table. Within the storage furnace, the cast strand sections are then transported via a walking beam conveyor from the center of the furnace towards an furnace side, from where they then, again via a roller table, reach the rolling mill, which is designed as a high-deformation rolling stand.

Tritt im Walzwerk eine kurzzeitige Unterbrechung auf, wie sie bspw. durch einen Kaliberwechsel oder eine Störung hervorgerufen werden kann, dann läßt sich eine gewisse Anzahl von Gußstrang-Teilstücken in der anderen Hälfte des Speicherofens deponieren, indem sie von der Ofenmitte aus durch einen Quertransport zur anderen Ofenseite hin verlagert werden. Nach Beendigung der Unterbrechung können dann die zusätzlich gespeicherten Strangguß-Teilstücke allmählich in den normalen Materialfluß zum Walzwerk hin zurückgeführt werden.If there is a brief interruption in the rolling mill, such as can be caused by a change in caliber or a malfunction, then a certain number of cast strand sections can be deposited in the other half of the storage furnace by moving them from the center of the furnace to a transverse transport on the other side of the furnace. After the interruption has ended, the additionally stored continuous casting sections can then be gradually returned to the normal material flow to the rolling mill.

Langzeitige Betriebsunterbrechungen im Walzwerk, welche dann die Kapazität des Speicherofens übersteigen, erfordern hingegen den Einsatz eines zusätzlichen Kühlbettes hinter der Stranggießanlage. Die laufende Produktion der Stranggießanlage muß dann dem Kühlbett zugeführt und dort abgekühlt werden. Erst wenn die Produktion des Walzwerkes wieder aufgenommen werden kann, lassen sich die inzwischen abgekühlten Strangguß-Teilstücke über einen zusätzlichen Aufnahmerost und einen weiteren Rollgang in das Ende der zweiten Hälfte des Speicherofens, und zwar im kalten Zustand, einführen, so daß sie bei der Durchwanderung des Speicherofens erst vollständig wieder erwärmt werden müssen, bevor sie dem dem Speicherofen nachgeordneten Walzwerk zugeführt werden können.Long-term interruptions in operation in the rolling mill, which then exceed the capacity of the storage furnace, require the use of an additional cooling bed behind the continuous caster. The ongoing production of the continuous caster must then be fed to the cooling bed and cooled there. Only when production of the rolling mill can be resumed can the now cooled continuous cast sections be introduced into the end of the second half of the storage furnace via an additional grate and a further roller table, so that they are cold when they are being passed through of the storage furnace must first be completely reheated before they can be fed to the rolling mill downstream of the storage furnace.

Es liegt auf der Hand, daß die bekannte Verfahrensart nicht nur eine umständliche und unwirtschaftliche Betriebsweise der Gesamtanlage bedingt, sondern auch noch einen erheblichen, zusätzlichen Anlagenaufwand zwischen der Stranggießanlage und dem Speicherofen erforderlich macht, der eine Vergrößerung der Hallenlänge bedingt.It is obvious that the known type of process not only requires a cumbersome and uneconomical operation of the entire system, but also requires a considerable amount of additional equipment between the continuous casting system and the storage furnace, which increases the length of the hall.

Die Erfindung zielt darauf ab, ein Verfahren zum Herstellen von warmgewalztem Stahlband der eingangs beschriebenen, bekannten Art sowie eine Anlage zur Durchführung dieses Verfahrens anzugeben, mit dem bzw. durch die das Auswalzen des Stahlbandes unter Benutzung von Gußstrang-Teilstücken stattfinden kann, die nicht nur über ihre ganze Länge ein gleichbleibendes Temperaturprofil aufweisen und dadurch ein qualitativ hochwertiges Endprodukt ergeben. Vielmehr soll auch erreicht werden, daß die während eines Stillstands des in der Gesamtanlage nachgeordneten Walzwerks von der Stranggießanlage kontinuierlich weiter produzierten Gußstrang-Teilstücke problemlos in den Ofen eingeführt und so lange darin gespeichert werden können, bis der normale Walzbetrieb wieder beginnt.The invention aims to provide a method for producing hot-rolled steel strip of the known type described above and a system for carrying out this method, with or by which the rolling out of the steel strip can take place using cast strand sections, which not only Have a constant temperature profile over their entire length, resulting in a high-quality end product. Rather, it should also be achieved that the cast strand sections continuously produced by the continuous casting plant during a standstill of the downstream rolling mill in the overall system can be introduced into the furnace without problems and stored therein until normal rolling operation begins again.

Gelöst wird diese Aufgabe in verfahrenstechnischer Hinsicht dadurch, daß nach dem Kennzeichen des Anspruchs 1 die vom Gußstrang abgetrennten Gußstrang-Teilstücke ausschließlich unmittelbar in den Ofen eingeführt und darin unter Quertransport gespeichert werden, daß dabei der Ofen im wesentlichen ohne zusätzliche Energiezufuhr betrieben wird und die Gußstrang-Teilstücke darin über einen Zeitraum gespeichert werden, welcher einem Mehrfachen, bspw. dem Vierfachen ihrer Gießzeit entspricht, daß die Walzung jedes einzelnen Gußstrang-Teilstücks aber in einer Zeiteinheit durchgeführt wird, die nur einem Bruchteil, z.B. einem Fünftel, seiner Gießzeit entspricht, und daß die Walzung diskontinuierlich durchgeführt und dabei der Walzvorgang jeweils über einen Zeitraum, welcher der Differenz zwischen einer Gießzeit und einer Walzzeit entspricht, mit einer Pausenzeit unterbrochen wird.In technical terms, this object is achieved in that, according to the characterizing part of claim 1, the cast strand sections separated from the cast strand are only introduced directly into the furnace and stored therein with transverse transport, in that the furnace is operated essentially without additional energy supply and the cast strand -Tiles are stored therein over a period of time which corresponds to a multiple, for example four times their casting time, but that the rolling of each individual cast strand section is carried out in a time unit which is only a fraction, for example one fifth corresponds to its casting time, and that the rolling is carried out discontinuously and the rolling process is interrupted with a pause for a period of time which corresponds to the difference between a casting time and a rolling time.

Durch die angegebenen Verfahrensschritte wird in vorteilhafter Weise erreicht, daß jedes Gußstrang-Teilstück zwischen der Beendigung des Gießvorgangs und dem Beginn des Walzzyklus über einen relativ langen Zeitraum im Ofen verbleibt und dadurch innerhalb dieses Zeitraumes praktisch ohne zusätzliche Energiezufuhr von der Erstarrungstemperatur des Gußstranges auf die erforderliche Walztemperatur der Gußstrang-Teilstücke gebracht und auch auf dieser gehalten wird. Da zwischen der Einspeicherung und dem Walzbeginn immer eine größere Anzahl von Gußstrang-Teilstücken mit gestreckter Länge im Ofen verweilt, stellt sich an diesen ein praktisch über die ganze Länge gleichmäßiges Temperaturprofil ein, zumal auch während des Walzbetriebes noch Gußstrang- Teilstücke von der Stranggießanlage her in den Ofen gelangen können.The process steps indicated advantageously ensure that each casting strand section remains in the furnace for a relatively long period between the end of the casting process and the beginning of the rolling cycle and as a result practically without additional energy being supplied from the solidification temperature of the casting strand to the required one within this period Rolling temperature of the cast strand sections brought and also held on this. Since between the storage and the start of rolling there is always a larger number of cast strand sections with a stretched length in the furnace, a temperature profile that is practically uniform over the entire length is obtained, especially since the cast strand sections from the continuous casting system also during the rolling operation can reach the oven.

Gemäß der Erfindung ist nach Anspruch 2 vorgesehen, daß Montagezeiten am Walzwerk, bspw. die Walzenwechsel, in die Pausenzeiten der Walzzyklen gelegt und dabei gegebenenfalls die Pausenzeiten zweier Walzzyklen unmittelbar hintereinandergesetzt werden, und daß die während dieser Pausenzeiten gebildeten Gußstrang-Teilstücke zusätzlich in den Ofen eingeführt und darin gespeichert werden.According to the invention it is provided according to claim 2 that assembly times on the rolling mill, for example the roll changes, are placed in the pause times of the rolling cycles and, if necessary, the pause times of two rolling cycles are placed directly one behind the other, and that the cast strand sections formed during these pause times are additionally placed in the furnace introduced and stored in it.

Regelmäßig reichen Pausenzeiten von etwa 10 Minuten zwischen aufeinanderfolgenden Walzzyklen aus, um die am Walzwerk notwendigen Montagearbeiten (Walzenwechsel) durchzuführen. Nur wenn sich ergibt, daß eine verfügbare Pausenzeit für die Beendigung der Montagearbeiten nicht völlig ausreicht, dann können in vorteilhafter Weise zwei Pausenzeiten unmittelbar aneinandergereiht werden, an die sich dann zur nachfolgenden Erzielung des normalen Ablaufs weiterer Walzzyklen auch zwei Walzzeiten unmittelbar aneinanderreihen können.Break times of about 10 minutes between successive rolling cycles are usually sufficient to carry out the assembly work (roll change) required on the rolling mill. Only if it turns out that an available pause time is not completely sufficient for the completion of the assembly work, then two pause times can advantageously be lined up directly, to which two rolling times can then be directly lined up to subsequently achieve the normal course of further rolling cycles.

Eine Anlage zur Durchführung des vorstehend im einzelnen erläuterten Verfahrens besteht aus einer Stranggießanlage zum kontinuierlichen Gießen eines bandförmigen Gußstranges, aus einer Querteilvorrichtung zum Unterteilen des erstarrten Gußstranges in Gußstrang-Teilstücke und aus einem Temperaturausgleichs- und Speicherofen mit Quertransport für die Aufnahme der Gußstrang-Teilstücke in gestreckter Länge, der eine Mehrzahl von durch den Quertransport bedienbare Speicherplätze für Gußstrang-Teilstücke enthält. Sie ist nach Anspruch 3 dadurch gekennzeichnet, daß der Speicherofen mit seinem Quertransport für unmittelbare Beschickung mit Gußstrang-Teilstücken von der Stranggießanlage eingerichtet ist, daß er erste Vorrats-Speicherplatz des Quertransportes Achsfluchtlage mit der Stranggießanlage aufweist, während an den letzten Speicherplatz des Quertransportes über einen Ablaufrollgang das Walzwerk angeschlossen ist, und daß die Anzahl der Vorrats-Speicherplätze für Gußstrang-Teilstücke auf dem Quertransport auf die Differenz ihrer notwendigen Verweilzeit im Ofen zur Gießzeit für ein einzelnes Gußstrang-Teilstück abgestimmt ist.A system for carrying out the method explained in detail above consists of a continuous casting system for the continuous casting of a band-shaped cast strand, of a cross-dividing device for dividing the solidified cast strand into cast strand sections and of a temperature compensation and storage furnace with transverse transport for receiving the cast strand sections in stretched length, which contains a plurality of storage locations for cast strand sections which can be operated by the transverse transport. It is characterized according to claim 3, characterized in that the storage furnace with its transverse transport is set up for direct loading with cast strand sections from the continuous casting installation, that it has the first storage location of the transverse transport axis alignment with the continuous casting installation, while at the last storage location of the transverse transport via one Abrollrollgang the rolling mill is connected, and that the number of storage spaces for cast strand sections on the transverse transport is matched to the difference between their necessary residence time in the furnace to the casting time for a single cast strand section.

Beträgt bspw. die Gießzeit für ein einzelnes Gußstrang-Teilstück etwa 12,5 Minuten und muß die Verweilzeit für die Gußstrang-Teilstücke im Speicherofen etwa 50 Minuten betragen, dann weist entsprechend der Lehre des Anspruchs 3 der Speicherofen entsprechend dem Verhältnis 4:1 mindestens vier Vorrats-Speicherplätze für Gußstrang- Teilstücke auf.If, for example, the casting time for a single cast strand section is approximately 12.5 minutes and the dwell time for the cast strand sections in the storage furnace is approximately 50 minutes, then according to the teaching of claim 3, the storage furnace has at least four according to the ratio 4: 1 Storage locations for cast strand sections.

Ein besonders wichtiges Ausbildungsmerkmal der erfindungsgemäßen Anlage zum Herstellen von warmgewalztem Stahlband besteht jedoch nach Anspruch 4 darin, daß der Speicherofen außer den Vorrats-Speicherplätzen für Strangguß-Teilstücke auf dem Quertransport noch Puffer-Speicherplätze für Strangguß-Teilstücke enthält, die bei kontinuierlichem Betrieb der Stranggießanlage während verlängerter Stillstandszeiten des Walzwerks zwischen den Walzzeiten zweier aufeinanderfolgender Walzzyklen zusätzlich mit Gußstrang-Teilstücken in gestreckter Länge beschickbar sind.A particularly important training feature of the system according to the invention for the production of hot-rolled steel strip is, however, according to claim 4, that the storage furnace contains, in addition to the storage locations for continuous casting sections on the transverse transport, buffer storage locations for continuous casting sections, which are in continuous operation of the continuous casting system during extended downtimes of the rolling mill between the rolling times of two successive rolling cycles, cast iron sections can also be fed in extended lengths.

Nach der Erfindung bewährt es sich dabei besonders, wenn gemäß Anspruch 5 im Speicherofen die Vorrats-Speicherplätze im wesentlichen horizontal nebeneinander liegen, während die Puffer-Speicherplätze in Höhenrichtung übereinander angeordnet sowie seitlich von den Vorrats-Speicherplätzen positioniert sind.According to the invention, it proves particularly useful if, according to claim 5, the storage locations are essentially horizontally next to one another in the storage furnace, while the buffer storage locations are arranged one above the other in the vertical direction and are positioned laterally of the storage locations.

während üblicherweise die Vorrats-Speicherplätze ständig etwa auf gleicher Höhe nebeneinander liegen, ist erfindungsgemäß nach Anspruch 6 in Vorschlag gebracht, daß die Puffer-Speicherplätze innerhalb des Speicherofens einzeln nacheinander auf die Transportebene der Gußstrang-Teilstücke und der Vorrats-Speicherplätze einstellbar sind.While usually the storage spaces are always next to each other at approximately the same height, it is proposed according to the invention that the buffer storage spaces within the storage furnace can be set individually one after the other on the transport level of the cast strand sections and the storage spaces.

Die während notwendiger, verlängerter Stillstandzeiten des Walzwerkes bei kontinuierlichem Betrieb der Stranggießanlage gefertigten Gußstrang-Teilstücke können mit relativ geringem zusätzlichem Aufwand und Platzbedarf ohne Beeinträchtigung der Vorrats-Speicherplätze im Speicherofen aufgenommen werden und lassen sich nach Beendigung der stillstandzeit des Walzwerkes durch entsprechende Vermehrung aufeinanderfolgender Walzzyklen völlig problemlos zum Stahlband auswalzen, indem dann nämlich - bei gleichbleibender Walzzeit - die aufeinanderfolgenden Walzzyklen durch entsprechende Verminderung ihrer Pausenzeiten verkürzt werden.The cast strand sections produced during the necessary, extended downtimes of the rolling mill with continuous operation of the continuous casting plant can be taken up with relatively little additional effort and space without affecting the storage spaces in the storage furnace and can be completely eliminated after the rolling mill downtime has ended by appropriately increasing successive rolling cycles Roll out to the steel strip without any problems, because then - with the same rolling time - the successive rolling cycles are shortened by reducing their break times accordingly.

Geht man davon aus, daß die effektive Walzzeit für ein einzelnes Gußstrang-Teilstück 2,5 Minuten beträgt und bei einem normalen Walzzyklus die Pausenzeit etwa 10 Minuten ausmacht, dann können innerhalb dieser normalerweise üblichen Pausenzeit problemlos noch zwei auf den Puffer-Speicherplätzen befindliche Strangguß-Teilstücke zusätzlich ausgewalzt werden, wenn die wirkliche Pausenzeit zwischen zwei Walzzeiten jeweils auf etwa 1,7 Minuten reduziert wird. Während zweier normaler Walzzyklen könnten daher ohne weiteres bis zu vier in den Puffer-Speicherplätzen aufgenommene Gußstrang-Teilstücke zusätzlich ausgewalzt werden, um anschließend wieder den Normalbetrieb der Anlage zu ermöglichen.If one assumes that the effective rolling time for a single cast strand section is 2.5 minutes and that the break time in a normal rolling cycle is about 10 minutes, then two continuous castings located on the buffer storage locations can easily be found within this normally usual break time. Parts are additionally rolled out if the actual pause time between two rolling times is reduced to about 1.7 minutes each. During two normal rolling cycles, up to four cast strand sections accommodated in the buffer storage locations could therefore additionally be rolled out in order to subsequently enable normal operation of the system.

Nach Anspruch 7 ist es im Hinblick auf die oben gemachten Ausführungen besonders empfehlenswert, daß im Speicherofen die Anzahl der Puffer-Speicherplätze mindestens gleich der Anzahl der Vorrats-Speicherplätze vorgesehen ist.According to claim 7, it is particularly recommended with regard to the statements made above that the number of buffer storage spaces is provided at least equal to the number of storage storage spaces in the storage furnace.

Für einen ordnungsgemäßen Betrieb der Anlage ist desweiteren wichtig, daß nach Anspruch 8 zwischen dem Längstransport für die einzelnen Gußstrang-Teilstücke, dem Quertransport der Vorrats-Speicherplätze und den Puffer-Speicherplätzen eine Übergabevorrichtung für einzelne Gußstrang- Teilstücke vorgesehen ist, die dann in Tätigkeit tritt, wenn Gußstrang-Teilstücke vom Längstransport in die Puffer-Speicherplätze übernommen werden müssen oder aber von diesen an den Quertransport für die Vorrats-Speicherplätze übergeben werden sollen.For proper operation of the system it is further important that a transfer device for individual cast strand sections is provided between the longitudinal transport for the individual cast strand sections, the transverse transport of the storage storage spaces and the buffer storage spaces, which then comes into operation , if cast strand sections have to be taken over from the longitudinal transport into the buffer storage locations or are to be transferred from these to the transverse transport for the storage storage locations.

Nach Anspruch 9 liegt es dabei im Rahmen der Erfindung, daß das dem Speicherofen nachgeordnete Walzwerk als kontinuierliche Fertigstraße ausgelegt ist. Diese kontinuierliche Fertigstraße kann dabei sowohl mit normalen Fertigwalzgerüsten als auch mit Kompakt-Fertigwalzgerüsten ausgestattet werden.According to claim 9, it is within the scope of the invention that the rolling mill downstream of the storage furnace is designed as a continuous finishing train. This continuous finishing train can be equipped with normal finishing stands as well as with compact finishing stands.

Nach Anspruch 10 ist es schließlich aber auch möglich, daß das dem Speicherofen nachgeordnete Walzwerk als Reversiergerüst, insbesondere als Steckel-Walzwerk, mit auslauf- und einlaufseitigen Bundhaspel bzw. -Haspelöfen ausgelegt ist. Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt.According to claim 10, it is finally also possible that the rolling mill downstream of the storage furnace is designed as a reversing stand, in particular as a Steckel rolling mill, with coil reel or reel furnaces on the outlet and inlet side. Embodiments of the invention are shown in the drawing.

Es zeigen

  • Figur 1 in prinzipieller Seitenansicht eine Anlage zum Herstellen von warmgewalztem Stahlband aus bandförmig stranggegossenem Vormaterial,
  • Figur 2 die Anlage nach Fig. 1 in der Draufsicht,
  • Figur 3 einen Schnitt entlang der Linie 111-111 in Fig. 2,
  • Figur 4 eine abgewandelte Bauart einer Anlage zum Herstellen von warmgewalztem Stahlband aus bandförmig stranggegossenem Vormaterial,
  • Figur 5 eine Draufsicht auf die Anlage nach Fig. 4 und
  • Figur 6 einen Schnitt entlang der Linie VI-VI in Fig. 5.
Show it
  • FIG. 1 shows a basic side view of a plant for producing hot-rolled steel strip from strip-shaped continuous material,
  • FIG. 2 shows the plant according to FIG. 1 in a top view,
  • FIG. 3 shows a section along the line 111-111 in FIG. 2,
  • FIG. 4 shows a modified design of a plant for producing hot-rolled steel strip from strip-shaped continuous material,
  • Figure 5 is a plan view of the system of Fig. 4 and
  • FIG. 6 shows a section along the line VI-VI in FIG. 5.

Nach den Fig. 1 und 2 sowie 4 und 5 der Zeichnung weist die Anlage zum Herstellen von warmgewalztem Stahlband eine Stranggießmaschine 1 auf, an deren Ausgang ein Rollgang 2 anschließt, dem als Querteilvorrichtung eine Brennschneidmaschine 3 zum Unterteilen des Gußstrangs 4 zugeordnet ist.1 and 2 and 4 and 5 of the drawing, the system for producing hot-rolled steel strip has a continuous casting machine 1, at the output of which a roller table 2 connects, to which a flame cutting machine 3 is assigned as a cross-cutting device for dividing the cast strand 4.

Das verflüssigte Material zur Bildung des Gußstrangs 4 wird in der Bogenführung der Stranggießmaschine abgekühlt. Die Austrittstemperatur des Gußstanges 4 am Ende der Bogenführung liegt noch oberhalb von 1150°C.The liquefied material for forming the cast strand 4 is cooled in the sheet guide of the continuous casting machine. The outlet temperature of the cast rod 4 at the end of the sheet guide is still above 1150 ° C.

Vom Rollgang 2 läuft der erstarrte Gußstrang 4 etwa mit einer Temperatur von 1150°C in einen Speicherofen 5 ein und wird in diesem zunächst von einer sich an den Rollgang 2 anschließenden Rollbahn aufgenommen. Dabei wird der Gußstrang 4 von der Brennschneidmaschine 3 in Gußstrang-Teilstücke 4a vorgegebener Länge, bspw. von 50 Metern, unterteilt.The solidified cast strand 4 runs from the roller table 2 into a storage oven 5 at a temperature of approximately 1150 ° C. and is initially taken up by a roller conveyor adjacent to the roller table 2. Here, the cast strand 4 is divided by the flame cutting machine 3 into cast strand sections 4a of a predetermined length, for example of 50 meters.

Die in den Speicherofen 5 eingefahrenen Gußstrang-Teilstücke 4a werden sodann durch einen Quertransport 6 innerhalb des Speicherofens 5 und quer zu ihrer Längsrichtung schrittweise bewegt, wobei der Quertransport 6 mehrere, bspw. vier, mit Abstand nebeneinanderliegende Vorrats-Speicherplätze aufweist. Der erste dieser Vorrats-Speicherplätze befindet sich dabei im Speicherofen 5 in Achsfluchtlage mit dem Rollgang 2, während der letzte Speicherplatz in Achsfluchtlage mit einem dem Speicherofen 5 nachgeordneten Ablaufrollgang 7 vorgesehen ist.The cast strand sections 4a retracted into the storage furnace 5 are then moved step by step by means of a transverse transport 6 within the storage furnace 5 and transversely to their longitudinal direction, the transverse transport 6 having a plurality, for example four, of storage spaces adjacent to one another at a distance. The first of these storage locations is located in the storage oven 5 in the axial alignment with the roller table 2, while the last storage location in the axial alignment is provided with a roller table 7 downstream of the storage oven 5.

Innerhalb des Speicherofens 5 ist dem Ablaufrollgang 7 eine Rollenbahn zugeordnet, mit deren Hilfe das durch den Quertransport 6 auf den letzten Speicherplatz gebrachte Gußstrang-Teilstück 4a aus dem Speicherofen 5 auf den Ablaufrollgang 7 gebracht werden kann.Within the storage furnace 5, the roller conveyor 7 is assigned a roller conveyor, with the help of which the cast strand section 4a brought to the last storage location by the transverse transport 6 can be brought from the storage oven 5 onto the roller conveyor 7.

Wenn unterstellt wird, daß die Stranggießmaschine 1 für die Bildung eines Gußstranges 4 mit einer einem Gußstrang-Teilstück 4a entsprechenden Längenabmessung von 50 Metern eine Gießzeit von 12, 5 Minuten benötigt, dann ergibt sich hieraus, daß der Quertransport 6 innerhalb des Speicherofens 5 jeweils in Zeitabständen von 12, 5 Minuten einen Transportschritt auszuführen hat und daß demnach die Durchlaufzeit jedes Gußstrang-Teilstücks 4a durch den Speicherofen 5 etwa 50 Minuten beträgt, bevor es an den Ablaufrollgang 7 übergeben wird. Durch Leertakte können auch kürzere Durchlaufzeiten eingestellt werden. Innerhalb des Speicherofens 5 werden die einzelnen Gußstrang-Teilstücke 4a unter Beibehaltung ihrer gestreckten Länge gegenüber der bei 1150°C liegenden Einlauftemperatur auf eine Auslauftemperatur von etwa 1050°C - die Walztemperatur - gebracht. Die Temperaturverminderung um etwa 100°C kann innerhalb des Speicherofens 5 praktisch ohne jegliche äußere Energiezufuhr stattfinden, wobei das Temperaturprofil in Längsrichtung der einzelnen Gußstrang-Teilstücke sehr gleichmäßig ausfällt.If it is assumed that the continuous casting machine 1 needs a casting time of 12.5 minutes for the formation of a casting strand 4 with a length dimension of 50 meters corresponding to a casting strand section 4a, then it follows that the transverse transport 6 within the storage furnace 5 in each case Intervals of 12, 5 minutes must be carried out a transport step and that the passage time of each cast strand section 4a through the storage furnace 5 is about 50 minutes before it is transferred to the roller table 7. Shorter throughput times can also be set using idle cycles. Within the storage furnace 5, the individual cast strand sections 4a are brought to an outlet temperature of approximately 1050 ° C. - the rolling temperature - while maintaining their elongated length relative to the inlet temperature at 1150 ° C. The temperature reduction by approximately 100 ° C. can take place within the storage furnace 5 practically without any external energy supply, the temperature profile in the longitudinal direction of the individual cast strand sections being very uniform.

Vom Ablaufrollgang 7 werden die einzelnen Gußstrang-Teilstücke 4a zunächst durch eine Entzunderungsstation 8 geführt und gelangen dann in eine kontinuierliche Fertigstraße 9, die bspw. sechs Quarto-Fertiggerüste umfaßt. An die kontinuierliche Fertigstraße 9 schließt sich eine Kühlstrecke 10 an, die im Bereich eines Transportrollgangs 11 wirksam ist. Vom Transportrollgang 11 wird das fertiggewalzte Stahlband 12 über einen Treibapparat 13 einem Aufwickelhaspel 14 zugeführt und von diesem zu einem Bandbund gewickelt.From the roller table 7, the individual cast strand sections 4a are first passed through a descaling station 8 and then reach a continuous finishing train 9, which comprises, for example, six four-high finishing stands. A cooling section 10 adjoins the continuous finishing train 9 and is effective in the area of a transport roller table 11. From the transport roller table 11, the finished rolled steel strip 12 is fed to a take-up reel 14 via a driving device 13 and is wound by the latter into a coil.

Die dem letzten Speicherplatz des Quertransportes 6 zugeordnete Rollenbahn im Speicherofen 5 kann als Pendelrollgang ausgelegt werden, mit dessen Hilfe sich das jeweils darauf befindliche Gußstrang-Teilstück 4a in begrenztem Maße innerhalb des Speicherofens 5 bedarfsweise in Längsrichtung hin und her bewegen läßt.The roller conveyor in the storage oven 5 assigned to the last storage location of the transverse transport 6 can be designed as a pendulum roller table, with the aid of which the cast strand section 4a located thereon can be moved back and forth within the storage oven 5 to a limited extent as required in the longitudinal direction.

Es ist erkennbar, daß in der aus den Fig. 1 und 2 ersichtlichen Anlage vom Beginn des Stranggießprozesses bis zum Walzbeginn eine größere Anzahl, nämlich vier, Gußstrang-Teilstücke 4a vorproduziert und in gestreckter Länge gespeichert werden. Hierdurch wird bezweckt, daß die einzelnen Strangguß-Teilstücke innerhalb des Speicherofens 5 ohne jegliche, zumindest aber ohne wesentliche zusätzliche Einwirkung von der Erstarrungstemperatur des Gußstranges 4 auf die Walztemperatur von etwa 1050°C gebracht werden. Dies wird einfach dadurch erreicht, daß die für die Fertigstellung eines Gußstrang-Teilstücks 4a notwendige Gießzeit der Stranggießmaschine durch die Speicherplätze auf dem Quertransport 6 im Speicherofen 5 entsprechend vervielfacht, bspw. vervierfacht wird, bevor der Walzzyklus für das betreffende GußstrangTeilstück 4a beginnt.It can be seen that in the plant shown in FIGS. 1 and 2, from the beginning of the continuous casting process to the start of rolling, a larger number, namely four, cast strand sections 4a are pre-produced and stored in stretched length. The purpose of this is that the individual continuous casting sections within the storage furnace 5 are brought from the solidification temperature of the casting strand 4 to the rolling temperature of approximately 1050 ° C. without any, or at least without any significant additional action. This is simply achieved in that the casting time of the continuous casting machine required for the completion of a cast strand section 4a is multiplied accordingly by the storage locations on the transverse transport 6 in the storage furnace 5, for example ver is four times before the rolling cycle for the casting section 4a in question begins.

Bei einer Gießzeit von 12,5 Minuten steht also innerhalb des Speicherofens 5 zur Erreichung der Walztemperatur von 1050°C eine Verweilszeit von 50 Minuten zur Verfügung, die allerdings im Bedarfsfall durch Leertakte reduziert werden kann.With a casting time of 12.5 minutes, there is a dwell time of 50 minutes within the storage furnace 5 to reach the rolling temperature of 1050 ° C, which, however, can be reduced by empty cycles if necessary.

Während der Verweilzeit der einzelnen Gußstrang-Teilstücke 4a im Speicherofen 5 wird natürlich die kontinuierliche Gießarbeit der Stranggießmaschine 1 fortgesetzt.During the dwell time of the individual cast strand sections 4a in the storage furnace 5, the continuous casting work of the continuous casting machine 1 is naturally continued.

Da nur in Zeitabständen von etwa 12,5 Minuten ein Gußstrang-Teilstück 4a aus dem Speicherofen 5 auf den Ablaufrollgang 7 und damit in die kontinuierliche Fertigstraße 9 gelangt, steht auch für jeden Walzzyklus eine Zeit von etwa 12,5 Minuten zur Verfügung. Die eigentliche Walzzeit für jedes Gußstrang-Teilstück 4a innerhalb der kontinuierlichen Fertigstraße 9 fällt aber wesentlich kürzer aus, als die verfügbare Zykluszeit. sie beträgt bspw. bei einem Gußstrang-Teilstück 4a mit einer Querschnittsabmessung von 50 x 1600mm bei 50 Meter Ausgangslänge nur etwa 2,5 Minuten. Demnach umfaßt jeder einzelne Walzzyklus eine Pausenzeit von etwa 10 Minuten, während der die kontinuierliche Fertigstraße 9 und folglich auch alle ihr nachgeordneten Anlagenteile außer Betrieb gehen können. Innerhalb dieser Pausenzeit lassen sich folglich alle normalerweise notwendigen Montage- und Umbauarbeiten an der kontinuierlichen Fertigstraße 9, insbesondere die Walzenwechsel an den einzelnen Quarto-Fertiggerüsten durchführen, weil diese Pausenzeiten einem ganzzahligen vielfachen, bspw. dem Vierfachen der notwendigen Walzzeit entsprechen.Since a cast strand section 4a arrives from the storage furnace 5 onto the roller table 7 and thus into the continuous finishing train 9 only at intervals of approximately 12.5 minutes, a time of approximately 12.5 minutes is also available for each rolling cycle. However, the actual rolling time for each cast strand section 4a within the continuous finishing train 9 is considerably shorter than the available cycle time. For example, in the case of a cast strand section 4a with a cross-sectional dimension of 50 × 1600 mm and a starting length of 50 meters, it is only about 2.5 minutes. Accordingly, each individual rolling cycle comprises a pause time of approximately 10 minutes, during which the continuous finishing train 9 and consequently also all parts of the plant downstream of it can go out of operation. As a result, all the normally necessary assembly and conversion work on the continuous finishing train 9, in particular the roll changes on the individual four-high finishing stands, can be carried out within this break time, because these break times correspond to an integral multiple, e.g. four times the required rolling time.

In manchen Fällen kann es jedoch durchaus vorkommen, daß die normale Pausenzeit zwischen zwei aufeinanderfolgenden Walzzyklen nicht ausreicht, um die durchzuführenden Montage- und Umbauarbeiten in dem an den Speicherofen 5 anschließenden Anlagenbereich, nämlich insbesondere an der kontinuierlichen Fertigstraße 9 vollständig zu beenden.In some cases, however, it may well happen that the normal break time between two successive rolling cycles is not sufficient to completely end the assembly and conversion work to be carried out in the system area adjoining the storage furnace 5, namely in particular on the continuous finishing train 9.

Es ist dann natürlich unumgänglich, die Stillstandszeit der dem Speicherofen 5 nachgeordneten Anlageteile entsprechend zu verlängern.It is then inevitable, of course, to extend the downtime of the system parts downstream of the storage furnace 5 accordingly.

Zugleich soll aber ausgeschlossen werden, daß auch der kontinuierliche Betrieb der Stranggießmaschine 1 unterbrochen werden muß. D.h. die während der verlängerten Stillstandszeit der dem Speicherofen 5 nachgeordneten Anlagenteile von der Stranggießmaschine 1 produzierten Gußstrang-Teilstücke 4a müssen zusätzlich im Speicherofen 5 aufgenommen werden, ohne daß darin der Betrieb des die Vorrats-Speicherplätze aufweisenden bzw. bildenden Quertransportes 6 in irgendeiner Weise beeinträchtigt wird.At the same time, however, it should be excluded that the continuous operation of the continuous casting machine 1 must also be interrupted. I.e. the cast strand sections 4a produced by the continuous casting machine 1 during the extended downtime of the system parts arranged downstream of the storage furnace 5 must additionally be accommodated in the storage furnace 5 without the operation of the transverse transport 6 having or forming the storage locations being impaired in any way.

Um das zu ermöglichen, ist der Speicherofen 5 zusätzlich zu den Vorrats-Speicherplätzen auf dem im wesentlichen horizontal orientierten Quertransports 6 noch mit Puffer-Speicherplätzen 15 für eine größere Anzahl von Gußstrang-Teilstücken 4b ausgerüstet, die sich in einem Bereich des Speicherofens 5 befinden, welcher seitlich neben dem den Quertransport 6 enthaltenden Bereich liegt. Hierin sind die Puffer-Speicherplätze 15 jeweils in Höhenrichtung mit Abstand übereinander angeordnet, und zwar so, daß sie mittels einer Hubvorrichtung 16 einzeln und nacheinander auf die Transportebene des Rollgangs 2 für die Gußstrang-Teilstücke 4a und 4b eingestellt werden können.In order to make this possible, in addition to the storage locations on the essentially horizontally oriented transverse transport 6, the storage furnace 5 is also equipped with buffer storage locations 15 for a larger number of cast strand sections 4b which are located in a region of the storage furnace 5. which lies to the side of the area containing the transverse transport 6. Here, the buffer storage locations 15 are arranged one above the other in the vertical direction, in such a way that they can be adjusted individually and in succession on the transport plane of the roller table 2 for the cast strand sections 4a and 4b by means of a lifting device 16.

Damit die einzelnen Puffer-Speicherplätze 15 sich mit den Gußstrang-Teilstücken 4b beschicken lassen, ist zwischen der im Bereich des Quertransportes 6 und in Verlängerung zum Rollgang 2 angeordneten Rollbahn und dem Puffer-Speicherplätzen 15 innerhalb des Speicherofens 5 eine besondere Übergabevorrichtung vorgesehen. Diese kann bspw., ebenso wie der Quertransport 6, als Hubbalken-Transportvorrichtung ausgeführt werden. während jedoch die Hubbalken-Transportvorrichtung des Quertransportes 6 lediglich so ausgelegt zu werden braucht, daß sie Transportschritte nur in einer Transportrichtung bewirkt, ist es im Falle der den Puffer-Speicherplätzen 15 zugeordneten Übergabevorrichtung notwendig, eine Auslegung vorzusehen, mit der wahlweise zwei zueinander entgegengesetzte Transportrichtungen bewältigt werden können. während es nämlich für die Beschickung der Puffer-Speicherplätze 15 mit Gußstrang-Teilstücken 4b notwendig ist, jeweils Transportschritte vom Quertransport 6 weg zu den Puffer-Speicherplätzen 15 hin zu vollführen, muß die Übergabevorrichtung zum späteren Leerräumen der Puffer-Speicherplätze 15 Transportbewegungen zum Quertransport 6 hin ausführen.So that the individual buffer storage locations 15 can be loaded with the cast strand sections 4b, a special transfer device is provided between the runway arranged in the area of the transverse transport 6 and in extension to the roller table 2 and the buffer storage locations 15 within the storage oven 5. This, for example, like the transverse transport 6, can be designed as a walking beam transport device. However, while the walking beam transport device of the transverse transport 6 only needs to be designed such that it effects transport steps in only one transport direction, in the case of the transfer device assigned to the buffer storage locations 15, it is necessary to provide a design with which two transport directions that are opposite to one another are optionally available can be mastered. While it is necessary to carry out transport steps from the transverse transport 6 to the buffer storage spaces 15 in order to load the buffer storage spaces 15 with cast strand sections 4b, the transfer device must later transport movements to the transverse transport 6 in order to empty the buffer storage spaces 15 later run out.

Für einen optimalen Betrieb des Speicherofens 5 während der die üblichen Pausenzeiten zwischen zwei Walzzyklen überschreitenden Stillstandszeiten der nachgeordneten Anlagenteile, und zwar insbesondere der kontinuierlichen Fertigstraße 9, ist es zweckmäßig, die Anzahl der Puffer-Speicherplätze 15 im Speicherofen 5 mindestens gleich der Anzahl der darin befindlichen Vorrats-Speicherplätze zu wählen. Im gezeigten Beispiel ist, wie aus Fig. 3 hervorgeht, die Anzahl der Puffer-Speicherplätze 15 sogar größer gewählt als diejenige der Vorrats-Speicherplätze. Es sind nämlich dort bei vier Vorrats-Speicherplätzen fünf Puffer-Speicherplätze 15 vorhanden.For optimal operation of the storage furnace 5 during the downtimes of the downstream system parts which exceed the usual break times between two rolling cycles, in particular the continuous finishing train 9, it is advisable to make the number of buffer storage spaces 15 in the storage furnace 5 at least equal to the number of them Select storage locations. In the example shown, as can be seen from FIG. 3, the number of buffer storage locations 15 is selected to be even larger than that of the storage storage locations. This is because there are five buffer storage locations 15 with four storage locations.

Wenn zwischen zwei aufeinanderfolgenden Walzzyklen aus Umbau-, Wartungs- und/oder Montagegründen längere Stillstandszeiten der dem Speicherofen 5 nachgeordneten Anlagenteile in Kauf genommen werden müssen, dann besteht die Möglichkeit, gegebenenfalls die Pausenzeiten zweier Walzzyklen unmittelbar hintereinanderzusetzen, weil die währenddessen gebildeten Gußstrang-Teilstücke 4b problemlos von den Puffer-Speicherplätzen 15 des Speicherofens 5 aufgenommen werden können. Wenn dann die dem Speicherofen 5 nachgeordneten Anlagenteile wieder in Betrieb gehen, besteht ohne weiteres die möglichkeit, auch die Walzzeiten zweier aufeinanderfolgender Walzzyklen unmittelbar hintereinander zu legen und damit kurzzeitig aufeinanderfolgend auch zwei Gußstrang-Teilstücke 4a aus dem Speicherofen 5 abzuziehen. Von den hierdurch freigewordenen beiden Vorrats-Speicherplätzen auf den Quertransport 6 kann bspw. einer unmittelbar über den Rollgang 2 von der Stranggießmaschine 1 aus mit einem Gußstrang-Teilstück 4a beschickt werden, während sich auf den zweiten Speicherplatz ein Gußstrang- Teilstück 4b von einem der Puffer-Speicherplätze 15 übernehmen läßt.If longer downtimes of the system components downstream of the storage furnace 5 have to be accepted between two successive rolling cycles for conversion, maintenance and / or assembly reasons, then there is the possibility of possibly placing the break times of two rolling cycles directly one after the other because the cast strand sections 4b formed in the meantime can be easily accommodated by the buffer storage locations 15 of the storage furnace 5. When the parts of the plant downstream of the storage furnace 5 then go back into operation, there is also the possibility without further ado of also arranging the rolling times of two successive rolling cycles directly one after the other and thus also briefly successively pulling off two cast strand sections 4a from the storage furnace 5. Of the two storage locations on the transverse transport 6 which are thereby freed, one can, for example, directly via the roller table 2 can be fed from the continuous casting machine 1 with a cast strand section 4a, while a cast strand section 4b can be taken over from one of the buffer storage locations 15 into the second storage location.

Falls während der Stillstandszeit der dem Speicherofen 5 nachgeordneten Anlagenteile mehr als ein Gußstrang-Teilstück 4b von den Puffer-Speicherplätzen 15 übernommen worden ist, ist es ohne weiteres auch möglich, mehr als zwei Walzzyklen unter Verkürzung ihrer Pausenzeiten kurz hintereinanderzuschalten, um dadurch innerhalb des Speicherofens 5 die Puffer-Speicherplätze 15 vorsorglich wieder freizumachen.If more than one cast strand section 4b has been taken over by the buffer storage locations 15 during the downtime of the system parts arranged downstream of the storage furnace 5, it is also readily possible to connect more than two rolling cycles in succession, shortening their pause times, in order thereby within the storage furnace 5 make the buffer storage spaces 15 available again as a precaution.

Werden bspw. die Pausenzeiten zweier aufeinanderfolgender Walzzyklen, welche normalerweise 10 Minuten betragen, jeweils durch Einschaltung einer weiteren Walzzeit von 2,5 Minuten unterbrochen, dann lassen sich bei Einhaltung von auf 3,75 Minuten verkürzten Pausenzeiten zusätzlich zwei Gußstrang-Teilstücke 4a bzw. 4b auswalzen und damit von den Puffer-Speicherplätzen 15 auf die Vorrats-Speicherplätze des Quertransportes 6 im Speicherofen 5 übernehmen.If, for example, the pause times of two successive rolling cycles, which are normally 10 minutes, are each interrupted by switching on a further rolling time of 2.5 minutes, then two cast strand sections 4a and 4b can be made if the pause times are shortened to 3.75 minutes roll out and thus take over from the buffer storage locations 15 to the storage locations of the transverse transport 6 in the storage furnace 5.

Es liegt auf der Hand, daß die vorstehend beschriebene Anlage zum Herstellen von warmgewalztem Stahlband 12 aus bandförmig stranggegossenem Vormaterial 4 eine optimale Anpassung des Walzwerks-Anlagenteils an die Produktion der kontinuierlich arbeitenden Stranggießmaschine 1 gewährleistet und dabei zugleich auch die Fertigung eines qualitativ hochwertigen Endproduktes sicherstellt. Die in den Fig. 4 bis 6 dargestellte Anlage unterscheidet sich von derjenigen nach den Fig. 1 bis 3 im Grunde genommen nur dadurch, daß dem Speicherofen 5 anstelle einer kontinuierlich arbeitenden Fertigstraße 9 mit Quarto-Walzgerüsten ein mit Reversierbetrieb arbeitendes Quarto-Walzgerüst 17 zugeordnet ist, das als Steckel-Walzwerk mit einem auslaufseitigen Bundhaspel bzw. Haspelofen 18 und einem einlaufseitigen Bundhaspel bzw. Haspelofen 19 zusammenarbeitet.It is obvious that the system described above for producing hot-rolled steel strip 12 from strip-shaped continuous material 4 ensures an optimal adaptation of the rolling mill system part to the production of the continuously operating continuous casting machine 1 and at the same time ensures the production of a high-quality end product. The plant shown in FIGS. 4 to 6 differs from that of FIGS. 1 to 3 basically only in that the storage furnace 5 instead of a continuously working finishing train 9 with four-high mill stands assigned a four-high mill stand 17 with reversing operation which works as a Steckel mill with an outlet-side coil reel or reel furnace 18 and an inlet-side coil reel or reel furnace 19.

Stranggießmaschine 1 und Speicherofen 5 stimmen jedoch in Aufbau und Arbeitsweise mit der Anlage nach den Fig. 1 bis 3 völlig überein.Continuous casting machine 1 and storage furnace 5, however, are completely identical in construction and mode of operation with the system according to FIGS. 1 to 3.

Claims (10)

1. Method for the production of hot-rolled steel strip from starting material continuously cast already in strip shape, in which method partial pieces (4a or 4b) of equal length are initially severed from the cast strand (4) rigidified after the casting, these partial pieces (4a, 4b) are then transferred one after the other with stretched length into a furnace (5) and stored in this as well as brought to and maintained at rolling temperature, in which method a greater number of cast strand partial pieces (4a and 4b) is preliminarily produced and stored until the beginning of rolling and individual cast strand partial pieces (4a and 4b) are introduced one after the other at rolling temperature into a rolling mill for rolling-down and in which method the continuous casting (1) is continuously continued also during the rolling operation as well as the cast strand partial pieces (4a and 4b) then formed introduced into the furnace for storage until rolling, characterised thereby, that the cast strand partial pieces (4a and 4b) severed from the cast strand (4) are exclusively introduced directly into the furnace (5) and stored therein subject to transverse transport (6), that the furnace (5) is in that case operated substantially without additional energy supply and the cast strand partial pieces (4a and 4b) are stored therein over a period which corresponds to a multiple of, for example four times their casting time, that the rolling of each individual cast strand partial piece (4a and 4b) is however carried out in a time unit which corresponds to only a fraction, for example one fifth of its casting time and that the rolling is carried out discontinuously and the rolling operation is in that case each time interrupted by an interval time over a period which corresponds to the difference between a casting time and a rolling time.
2. Method according to claim 1, characterised thereby, that assembly times at the rolling mill, for example the roll changes, are laid into the interval times of the rolling cycles and the interval times of two rolling cycles are then in a given case set one directly behind the other and that the cast strand partial pieces (4b) formed during these interval times are additionally introduced into the furnace (5) and stored (15) therein.
3. Plant, for the performance of the method according to one of the claims 1 and 2, consisting of a continuous casting plant (1) for the continuous casting of a strip-shaped cast strand (4), a transverse parting device (3) for the subdividing of the rigidified cast strand (4) into cast strand partial pieces (4a and 4b) and of a temperature-compensating and storage furnace (5) with transverse transport (6) for the reception of the cast strand partial pieces (4a and 4b) in stretched length, which furnace contains a plurality of storage spaces, which are operable by the transverse transport (6), for cast strand partial pieces (4a), characterised thereby, that the storage furnace (5) with its transverse transport (6) is arranged for direct charging with cast strand partial pieces (4a and 4b) from the continuous casting plant (1), that the first supply storage space of the transverse transport (6) displays axially aligned position with the continuous casting plant (1), whilst the rolling mill is connected by way of an outlet roller bed (7) to the last storage space of the transverse transport (6) and that the number of the supply storage spaces for cast strand partial pieces (4a) on the transverse transport is matched to the difference between their necessary dwell time in the furnace (5) and the casting time for an individual cast strand partial piece (4).
4. Plant according to claim 3, characterised thereby, that the storage furnace (5), apart from the supply storage spaces for cast strand partial pieces (4a) on the transverse transport (6), still contains buffer storage spaces (15) for cast strand partial pieces (4b).
5. Plant according to one of the claims 3 and 4, characterised thereby, that the supply storage spaces (6) in the storage furnace (5) lie one beside the other substantially horizontally, whilst the buffer storage spaces (15) are arranged one above the other in vertical direction as well as positioned laterally of the supply storage spaces (6) (Figs. 3 and 6).
6. Plant according to one of the claims 3 to 5, characterised thereby, that the buffer storage spaces (15) within the storage furnace (5) are settable individually one after the other to the transport plane (2) of the cast strand partial pieces (4a and 4b) as well as of the supply storage spaces (6) (16; Figs. 3 and 6).
7. Plant according to one of the claims 3 to 6, characterised thereby, that the number of the buffer storage spaces (15) in the storage furnace (5) is provided to be at least equal to the number of the supply storage spaces (6) (Figs. 3 and 6).
8. Plant according to one of the claims 3 to 7, characterised thereby, that a transfer device for individual cast strand partial pieces (4b) is provided between the longitudinal transport for the individual cast strand partial pieces (4a and 4b) as well as the transverse transport of the supply storage spaces (6) and the buffer storage spaces (15).
9. Plant according to one of the claims 3 to 8, characterised thereby, that the rolling mill arranged behind the storage furnace (5) is a continuous finishing train (9) (Figs. 1 and 2).
10. Plant according to one of the claims 3 to 9, characterised thereby, that the rolling mill arranged behind the storage furnace (5) is designed as reversing stand (17), in particular as Steckel rolling mill with coiling reels (18 and 19) at the outlet and reel furnaces at the inlet side (Figs. 4 and 5).
EP86114160A 1986-09-29 1986-10-13 Production of hot-rolled steel strip from continuously cast slabs Expired EP0264459B1 (en)

Priority Applications (18)

Application Number Priority Date Filing Date Title
AT86114160T ATE46463T1 (en) 1986-10-13 1986-10-13 PRODUCTION OF HOT ROLLED STEEL STRIP FROM CONTINUOUS CASTING SLABS.
DE8686114160T DE3665680D1 (en) 1986-10-13 1986-10-13 Production of hot-rolled steel strip from continuously cast slabs
ES86114160T ES2010653B3 (en) 1986-10-13 1986-10-13 MANUFACTURE OF A CAST GRINDING STEEL BELT
EP86114160A EP0264459B1 (en) 1986-10-13 1986-10-13 Production of hot-rolled steel strip from continuously cast slabs
IN693/MAS/87A IN170196B (en) 1986-10-13 1987-09-23
SU874203392A RU1801056C (en) 1986-10-13 1987-09-28 Method and equipment for making hot-rolled steel strip
ZA877351A ZA877351B (en) 1986-09-29 1987-09-29 Method and arrangement for producing hot rolled stgroup transfer polymerization catalyzed by mercury compounds eel band
US07/103,529 US4829656A (en) 1986-10-13 1987-09-30 Process for making hot-rolled steel strip
DD87307512A DD262375A5 (en) 1986-10-13 1987-10-01 METHOD AND DEVICE FOR PRODUCING HOT-ROLLED STEEL STRIP
CA000549432A CA1318578C (en) 1986-10-13 1987-10-05 Process and apparatus for making hot-rolled steel strip
MX008737A MX169996B (en) 1986-10-13 1987-10-07 PROCEDURE AND DEVICE FOR THE MANUFACTURE OF HOT ROLLED STEEL TAPE
BR8705427A BR8705427A (en) 1986-10-13 1987-10-09 PROCESS FOR THE MANUFACTURE OF HOT-LAMINATED STEEL BELT AND EQUIPMENT FOR CARRYING OUT THE PROCESS
KR1019870011252A KR940007167B1 (en) 1986-10-13 1987-10-12 Process for making hot-rolled steel strip and apparatus therefor
JP62257045A JP2664379B2 (en) 1986-10-13 1987-10-12 Method and apparatus for producing hot-rolled steel strip
CN87106902A CN1023451C (en) 1986-10-13 1987-10-13 Method and apparatus for manufacturing hot-rolled steel band
GR89400225T GR3000205T3 (en) 1986-10-13 1989-11-02 Production of hot-rolled steel strip from continuously cast slabs
LV930744A LV5599A3 (en) 1986-10-13 1993-06-29 Hot-rolled steel strip manufacturing method and its fitting device
LTRP1015A LT2522B (en) 1986-10-13 1993-09-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86114160A EP0264459B1 (en) 1986-10-13 1986-10-13 Production of hot-rolled steel strip from continuously cast slabs

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EP0264459A1 EP0264459A1 (en) 1988-04-27
EP0264459B1 true EP0264459B1 (en) 1989-09-20

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US (1) US4829656A (en)
EP (1) EP0264459B1 (en)
JP (1) JP2664379B2 (en)
KR (1) KR940007167B1 (en)
CN (1) CN1023451C (en)
AT (1) ATE46463T1 (en)
BR (1) BR8705427A (en)
CA (1) CA1318578C (en)
DD (1) DD262375A5 (en)
DE (1) DE3665680D1 (en)
ES (1) ES2010653B3 (en)
GR (1) GR3000205T3 (en)
IN (1) IN170196B (en)
MX (1) MX169996B (en)
RU (1) RU1801056C (en)

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KR940007167B1 (en) 1994-08-08
CN87106902A (en) 1988-04-20
RU1801056C (en) 1993-03-07
ES2010653B3 (en) 1989-12-01
JPS63101001A (en) 1988-05-06
BR8705427A (en) 1988-05-24
EP0264459A1 (en) 1988-04-27
IN170196B (en) 1992-02-22
DD262375A5 (en) 1988-11-30
JP2664379B2 (en) 1997-10-15
US4829656A (en) 1989-05-16
GR3000205T3 (en) 1990-12-31
DE3665680D1 (en) 1989-10-26
CN1023451C (en) 1994-01-12
KR880004866A (en) 1988-06-27
ATE46463T1 (en) 1989-10-15
MX169996B (en) 1993-08-04
CA1318578C (en) 1993-06-01

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