EP0165586A2 - Dispositif avec un four thermique, pour pièces de billette découpées sur mesure, dans une installation de coulée continue - Google Patents

Dispositif avec un four thermique, pour pièces de billette découpées sur mesure, dans une installation de coulée continue Download PDF

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Publication number
EP0165586A2
EP0165586A2 EP85107487A EP85107487A EP0165586A2 EP 0165586 A2 EP0165586 A2 EP 0165586A2 EP 85107487 A EP85107487 A EP 85107487A EP 85107487 A EP85107487 A EP 85107487A EP 0165586 A2 EP0165586 A2 EP 0165586A2
Authority
EP
European Patent Office
Prior art keywords
heating furnace
chamber
furnace
opening
warming
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85107487A
Other languages
German (de)
English (en)
Other versions
EP0165586A3 (fr
Inventor
Ralph Weber
Herbert Rothe
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.)
Kortec AG
Badische Stahl Engineering GmbH
Korf BSW Engineering GmbH
Original Assignee
Kortec AG
Badische Stahl Engineering GmbH
Korf BSW 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
Application filed by Kortec AG, Badische Stahl Engineering GmbH, Korf BSW Engineering GmbH filed Critical Kortec AG
Publication of EP0165586A2 publication Critical patent/EP0165586A2/fr
Publication of EP0165586A3 publication Critical patent/EP0165586A3/fr
Withdrawn legal-status Critical Current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
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/028—Multi-chamber type furnaces
    • 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
    • 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
    • F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
    • 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
    • F27B9/22—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 on rails, e.g. under the action of scrapers or pushers
    • 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 specially adapted for furnaces of these types
    • F27B9/38—Arrangements of devices for charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D2099/0085—Accessories
    • F27D2099/0098—Means for moving the furnace
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2001/00—Composition, conformation or state of the charge
    • F27M2001/15—Composition, conformation or state of the charge characterised by the form of the articles
    • F27M2001/1539—Metallic articles
    • F27M2001/1547—Elongated articles, e.g. beams, rails
    • F27M2001/1552—Billets, slabs

Definitions

  • the invention relates to a system with a heating furnace for lengthwise cut pieces (billets, slabs, blocks) of a continuous casting plant according to the preamble of claim 1.
  • the hot metal strands with a square cross-section and an edge length of 120 mm, for example, produced in a billet caster are cut to a length of 9 or 15 m and cooled on reversible cooling beds.
  • the reversible cooling beds turn the length-cut strand pieces (billets) by 90 ° with each step during their transverse transport. This procedure prevents the billet from cooling on one side due to the rising cold air from below and thus prevents the billet from bending.
  • the billets are transported to the rolling mill and heated to the required rolling temperature in a heating furnace, usually in a walking beam furnace or a pusher furnace, before they are fed to the rolling stand.
  • the billets must also be heated uniformly in the heating furnace at least to a temperature of about 750 ° to 800 ° C for unalloyed steel in order to prevent the billets from bending (DE-PS 24 36 334).
  • hot billets of the continuous caster are also used in the heating furnaces of the finishing trains in combined steel rolling mills. Even with short transport routes, a drop in temperature of the hot billets on the way from the continuous caster to the heating furnace cannot be avoided.
  • existing systems are usually designed so that the performance of the rolling mill is greater than that of the steel mill, the rolling mill, for example, in a daily 16-hour operation that in a daily 24-hour operation of the steel mill processed billets, it is necessary to cool and save a portion of the billets generated, so that the elaborate reversible cooling bed on the continuous caster can not be dispensed with.
  • a furnace arrangement for heating slabs which consists of at least two individual furnaces, namely a pusher furnace and a pre-furnace, which pass through the slabs one after the other.
  • the through axis of the forehead is offset laterally to that of the pushing furnace.
  • the heating oven contains a preheating zone with a charging opening for cold use and a high-temperature zone with a charging opening for warm use.
  • a decharging opening common to both zones lies in the separation axis of both zones.
  • the billets only have to pass through one of the zones in order to reach the outlet common to both zones. In connection with heating the preheating zone by the hot exhaust gases of the high temperature zone, this leads to a improved thermal efficiency and an improved mode of operation of the heating furnace.
  • the object of the invention is to reduce the energy losses even further in a system according to the preamble of claim 1 and to enable buffer operation at different hourly outputs of the steelworks and rolling mill without a substantial increase in energy losses.
  • the system is to be simplified compared to known systems and operational reliability is to be increased.
  • a part of the heating furnace is designed as a transportable chamber which can be transported between a receiving position in the continuous casting installation and a delivery position directly in front of the charging opening of the heating furnace and, for example, a quarter of the material used in the heating furnace, for example 10 or 15 billets a long of, for example, 9 m.
  • the length of the warming chamber corresponds approximately to the width of the pusher furnace and by adapting the opening of the warming chamber on one side to the charging opening of the heating furnace and by openings on the opposite side to the cross section of the push rods of the pusher device, the heating furnace is in the delivery position of the strand pieces around a chamber added, from which the strand pieces contained in it can be charged into the heating furnace by means of the pusher.
  • the hot strand pieces used can be cooled during storage or transport be kept below 25 ° C per hour. This also enables storage over a period of 8 hours, as can occur in a buffer operation, without the temperature dropping by more than 150 ° to 200 ° C. If the strand pieces are inserted directly behind the separating device for the strand in the continuous casting system at a temperature of about 1000 ° C in the holding chamber, then their temperature is still above 800 ° C even after 8 hours and no special measures in the heating furnace are required to uniform heating on Walztem- perature sure. There is no risk of bending inside the heating furnace, even if it is heated from above on one side, so that the heating furnace can be designed to be low and thus more efficient. A preheating zone in the heating furnace is unnecessary.
  • the transport can take place via a crane system or via a rail track.
  • the size of the warming chamber depends on the type of transport.
  • the total weight of a crane system will be between 3 and 15 t.
  • FIG. 1 shows a heating furnace 1 for billets 2 which is assigned to a rolling mill and which is produced in a continuous casting plant 3.
  • Transportable warming chambers 4 are provided for the group transport of the hot billets supplied by the continuous casting plant 3, which are located between a receiving position 4/1 behind the separating device (not shown) for the strand of the continuous casting plant and a delivery position 4/2 between the charging opening of the heating furnace 1 and one Shock device 5 are transportable.
  • the transport route is marked by arrows.
  • a storage space 6 is provided for several warming chambers 4.
  • the schematic representation of the heating furnace 1 according to FIG. 2 shows the charging opening 7 and the decharging opening 8, which extend almost over the entire width of the furnace. With 9 a flue gas extraction is indicated.
  • the furnace can be designed in a known manner as a push furnace or as a walking beam furnace. Its openings can be closed by flaps, not shown.
  • FIG. 3 shows the heating furnace according to FIG. 2 with a holding chamber 4 in dispensing position 4/2.
  • Four push rods 10 of a pushing device 5, which is not shown in the rest, are illustrated, which engage second openings 11 which are adapted to the cross section of the push rods.
  • Fig. 4 shows a warming chamber 4 in the view IV-IV of Fig. 3, i.e. seen from the heating furnace 1.
  • Fig. 5 illustrates the sectional view V-V of Fig. 4 of the holding chamber.
  • the warming chamber 4 is in the form of a langge stretched cuboid, on the one long side 12 of which a charging opening 7 of the heating furnace 1 is adapted first opening 13 and on the opposite long side 14 of the cross section of the push rods 10 of the pushing device 5 (see FIGS. 3 and 1) there are second openings 11. Both the first opening 13 and the second openings 14 can be closed by slides, flaps or the like. For reasons of clarity, only a slide 15 of a second opening 11 is shown in FIG. 5.
  • the warming chamber 4 consists of a steel structure 16, through which the walls 17 forming the chamber are carried from a heat-insulating material, such as heat-insulating mats or a lining.
  • Sliding rails 18, on which the billets 2 are mounted, run transversely to the longitudinal sides 12 and 14 within the holding chamber. Eyelets 19 are provided in the supporting structure 16 for transport purposes.
  • the billets produced in 8 hours from 20 warming chambers with a capacity of 10 billets each (120 mm x 120 mm x 9000 mm with a weight per billet of approximately 1000 kg) were picked up on the continuous casting machine.
  • the temperature of the billets used on the continuous caster was 980 ° C (measured on the surface).
  • the warming chambers were each individually transported to the storage location 6 in the rolling mill by means of a pushing device (not shown) in the continuous casting installation 3 by means of a pushing device and set down there. After 8 hours, the warming chambers 4 were brought into the dispensing position 4/2 in succession and the billets located in the chambers were conveyed through the pusher 5 into the heating furnace.
  • the billet stock stored within 8 hours was refurbished after 5 hours due to the greater performance of the rolling mill. This means that after this time the sticks of the 20th chamber were inserted into the heating furnace.
  • the stick temperature was still 850 ° C.
  • the surface temperature of the billets used in the heating furnace was approximately 960 ° C.
  • the average heat consumption per tonne of steel when using the heating chamber was 0.628 x 10 6 kJ, while without using heating chambers it was 1.591 x 10 6 kJ, i.e. about 2.5 times.
  • the warming chambers more than half of the energy could be saved in the procedure described.
  • the advantage of the heating chambers is not only a substantial energy saving, but also an improvement in the quality of the steels, since it keeps them warm at high temperatures, diffusion compensation takes place over a longer period than before.
  • the temperature range above 750 ° C can be maintained when using the warming chambers even if chambers are stored for up to 8 hours in buffer mode (the cooling is less than 25 ° C per hour), there is also no bending of the billets are feared, the lower edge of the vault of the heating furnace can be kept very low, as a result of which very high flow rates of the hot exhaust gases are achieved and convection heat is obtained.
  • the preheating zone can be omitted in the heating furnace. It is sufficient if the heating furnace has a high-temperature or compensation zone in which the billets, which are hot above 750 ° C, are heated to the rolling temperature.
  • the heating furnace 6 shows in section a heating furnace 21 which has a high temperature zone 22 and a preheating zone 23.
  • the heating furnace has a first charging opening 24 in the high-temperature zone and a second charging opening 25 in the preheating zone and a decharging or pull-out opening 26 approximately in the middle of the high-temperature zone.
  • In front of the first charging opening 24 is the discharge position 4/2 of the holding chamber 4, from which the hot billets 2 located in the holding chamber 5 can be inserted into the high-temperature zone 22 of the heating furnace 21 by means of the plunger 10 of the pushing device 5.
  • In front of the second charging opening 25 there is a second pushing device 27 for inserting cold billets 28 into the preheating zone 23.
  • the preheating furnace 6 is therefore suitable for processing both cold feed material and feed material kept hot by warming chambers 4.
  • the warming chambers can also be operated as a preheating zone or preheating chamber by introducing the hot exhaust gases from the heating furnace.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Shovels (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
  • Tunnel Furnaces (AREA)
EP85107487A 1984-06-20 1985-06-18 Dispositif avec un four thermique, pour pièces de billette découpées sur mesure, dans une installation de coulée continue Withdrawn EP0165586A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3422922 1984-06-20
DE3422922A DE3422922C1 (de) 1984-06-20 1984-06-20 Anlage mit einem Waermofen fuer auf Laenge geschnittene Strangstuecke einer Stranggiessanlage

Publications (2)

Publication Number Publication Date
EP0165586A2 true EP0165586A2 (fr) 1985-12-27
EP0165586A3 EP0165586A3 (fr) 1986-09-03

Family

ID=6238829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85107487A Withdrawn EP0165586A3 (fr) 1984-06-20 1985-06-18 Dispositif avec un four thermique, pour pièces de billette découpées sur mesure, dans une installation de coulée continue

Country Status (4)

Country Link
US (1) US4586897A (fr)
EP (1) EP0165586A3 (fr)
JP (1) JPS6119736A (fr)
DE (1) DE3422922C1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438066A3 (en) * 1990-01-18 1991-12-27 Sms Schloemann-Siemag Aktiengesellschaft Installation for rolling out of hot wide strip
DE4121489A1 (de) * 1991-06-26 1993-01-14 Mannesmann Ag Ofenanlage als zwischenspeicher hinter einer duennbrammengiessanlage
AT399672B (de) * 1990-06-05 1995-06-26 Schloemann Siemag Ag Verfahren und anlage zur herstellung von warmgewalzten bändern oder profilen aus stranggegossenem vormaterial

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0236666B1 (fr) * 1986-01-16 1991-09-11 Sms Schloemann-Siemag Aktiengesellschaft Procédé de réchauffage de produits semi-finis provenant d'installations de coulée continue ou d'installations de formage en vue de leur chargement dans des installations de formage ou de finissage
EP0264459B1 (fr) * 1986-10-13 1989-09-20 Sms Schloemann-Siemag Aktiengesellschaft Production de bandes laminées à chaud à partir de brames coulées en continu
IT1225544B (it) * 1988-07-26 1990-11-22 Danieli Off Mecc Impianto di laminazione prodotti piani
DE3832004C1 (fr) * 1988-09-21 1990-01-25 Didier Engineering Gmbh, 4300 Essen, De
DE4041205A1 (de) * 1990-12-21 1992-06-25 Schloemann Siemag Ag Verfahren und anlage zum auswalzen von warmbreitband aus stranggegossenen duennbrammen
US5544408A (en) * 1992-05-12 1996-08-13 Tippins Incorporated Intermediate thickness slab caster and inline hot strip and plate line with slab sequencing
JP5691210B2 (ja) * 2010-03-19 2015-04-01 Ｊｆｅスチール株式会社 加熱炉の廃熱回収設備及び廃熱利用方法
ITUD20130127A1 (it) 2013-10-04 2015-04-05 Danieli Off Mecc Impianto siderurgico per la produzione di prodotti metallici lunghi e relativo metodo di produzione
CN111974959A (zh) * 2019-05-22 2020-11-24 中冶京诚工程技术有限公司 步进拉坯冷床及拉坯方法
CN112575175B (zh) * 2019-09-30 2021-11-23 宝钢湛江钢铁有限公司 一种厚板冷坯热坯分装的板坯库和加热炉布局结构及装炉方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT992325B (it) * 1973-08-08 1975-09-10 Italimpianti Procedimento e dispositivo per il riscaldo accelerato di billette e simili nei forni a longheroni
DE2706345A1 (de) * 1977-02-11 1978-08-17 Mannesmann Ag Ofenanordnung zum erwaermen von brammen
US4217095A (en) * 1977-05-23 1980-08-12 Tetsuya Tokitsu Reheating furnace for use in a hot rolling line
DE2723626A1 (de) * 1977-05-25 1978-11-30 Chugai Ro Kogyo Kaisha Ltd Aufheizverfahren in einer heisswalzstrasse und nachwaermofen zur durchfuehrung des verfahrens
US4445849A (en) * 1981-05-25 1984-05-01 Swiss Aluminium Ltd. Device for thermal treatment of scrap

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0438066A3 (en) * 1990-01-18 1991-12-27 Sms Schloemann-Siemag Aktiengesellschaft Installation for rolling out of hot wide strip
AT399672B (de) * 1990-06-05 1995-06-26 Schloemann Siemag Ag Verfahren und anlage zur herstellung von warmgewalzten bändern oder profilen aus stranggegossenem vormaterial
DE4121489A1 (de) * 1991-06-26 1993-01-14 Mannesmann Ag Ofenanlage als zwischenspeicher hinter einer duennbrammengiessanlage

Also Published As

Publication number Publication date
DE3422922C1 (de) 1985-06-20
EP0165586A3 (fr) 1986-09-03
US4586897A (en) 1986-05-06
JPS6119736A (ja) 1986-01-28

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