EP0301170B1 - Verfahren zum Herstellen dünner Metallbänder - Google Patents

Verfahren zum Herstellen dünner Metallbänder Download PDF

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Publication number
EP0301170B1
EP0301170B1 EP88105666A EP88105666A EP0301170B1 EP 0301170 B1 EP0301170 B1 EP 0301170B1 EP 88105666 A EP88105666 A EP 88105666A EP 88105666 A EP88105666 A EP 88105666A EP 0301170 B1 EP0301170 B1 EP 0301170B1
Authority
EP
European Patent Office
Prior art keywords
roller
casting
strip
inductor
melt
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 - Lifetime
Application number
EP88105666A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0301170A1 (de
Inventor
Robert Dipl.-Phys. Hentrich
Mathias Dipl.-Phys. Dr. Ing. Dubke
Karl-Heinz Dipl.-Ing. Hanke
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.)
Krupp Hoesch Stahl AG
Original Assignee
Krupp Stahl 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
Application filed by Krupp Stahl AG filed Critical Krupp Stahl AG
Priority to AT88105666T priority Critical patent/ATE58660T1/de
Publication of EP0301170A1 publication Critical patent/EP0301170A1/de
Application granted granted Critical
Publication of EP0301170B1 publication Critical patent/EP0301170B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/0665—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating
    • B22D11/0671—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating for heating or drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels

Definitions

  • the invention relates to a method for producing thin metal strips according to the preamble of claim 1 and a strip casting machine with two casting rollers for performing the method.
  • the generic method is known from European Patent Application No. 0 198 669.
  • the generic script shows a two-roll band casting machine with a lower casting roll with a large diameter and a small upper casting roll, which together form the casting slot.
  • the molten metal runs from a refractory container through a channel to the pouring slot and leaves it as a thin strip.
  • the object of the invention is to make the generic method less sensitive to fluctuations in the thermal conditions.
  • This object is achieved in that the melt is heated during the casting on the underside of the channel immediately before the melt comes into contact with the lower roller and the cooling effect of the lower roller on the melt in the heating area is partially reduced by superficial heating of the roller shell.
  • a further parameter for controlling and regulating the casting machine is introduced, which also allows the thickness of the finished strip according to claim 3 via the intensity of heating and heating to determine.
  • this can be used to fine-tune the strip thickness, which, as is known in the method of the generic type, does not take place by specifying the center distances between the casting rolls - the upper roll is resiliently mounted - but results from the cooling conditions.
  • the locally limited heating of the melt eliminates any caking and prevents the melt from solidifying in this thermally critical area.
  • the invention is particularly economical in terms of energy balance, because instead of the usual precautionary overheating of the entire metal melt, only a partial heating of the metal melt is required.
  • DE-OS 25 48 939 The use of electromagnetic fields in connection with a non-generic method for the production of metallic strip material by casting is known from DE-OS 25 48 939 for controlling the spread of the melt on the mold wall.
  • DE-OS 25 48 939 also shows a belt casting machine with casting rolls lying next to one another, in which the metal melt is fed via electromagnetic traveling fields; from which it can be deduced that the metal melt to be processed into the strip as a whole is subjected to the energy effect of the electromagnetic field. So energy is wasted to a considerable extent.
  • DE-PS 2950406 mentions the preheating of the casting roll surface in a single-roll belt casting machine. As a result, moisture is to evaporate from the roll surface in front of the pouring nozzle and the vapors are removed by means of a suction device. A partial heating of the melt before its contact with the roll surface is neither provided nor possible.
  • the invention further relates to a belt casting machine with two casting rolls delimiting a casting slot, rotating in opposite directions in the form of a larger, wider lower roll in diameter and an upper roll smaller in diameter, which is narrower than the lower roll and whose axial extent corresponds to the width of a finished strip to be cast a refractory container for receiving a molten metal, which passes into the pouring slot into a refractory channel for the forwarding of the molten metal, the refractory channel on the mouth side being delimited by a lower segment of the upper roller and an upper segment of the lower roller and the pouring slot, and the upper one and the lower end face, as well as the lateral curved end faces of the walls of the refractory duct, form gaps with the jackets of the casting rolls.
  • This generic Bandg discernma Machine is characterized according to the invention in that a heating device is arranged in the immediate area of the gap between the lower end face of the refractory channel and the jacket of the lower roller, which extends over the entire
  • a preferred embodiment of the two-roll band casting machine according to the invention contains an inductor for generating an electromagnetic field as a heating device.
  • an inductor for generating an electromagnetic field as a heating device.
  • claim 7 can be provided in a two-roll band casting machine that a recess is provided in the lower end face of the refractory channel at a distance from the bottom of the refractory channel, in which the inductor is inserted. In this way, the heating device is brought as close as possible to the place where it should have its localized effect.
  • an embodiment of the invention provides that the length of the inductor is greater than the length of the lower end face of the refractory channel.
  • the two-roll band casting machine shown in FIG. 1 contains a lower roll 1 with a larger diameter and an upper roll 2 with a smaller diameter, which together form a casting slot 3.
  • the shaft 4 assigned to the lower roller 1 is rigidly mounted, while the further shaft 5 assigned to the upper roller 2 is resiliently mounted.
  • the pouring slot 3 receives its desired setting only when pouring.
  • Lower roller 1 and upper roller 2 rotate in opposite directions, as is arranged by the associated rotating arrows 6 and 7.
  • the band casting machine includes a refractory container 8 for receiving a molten metal 9, the refractory container 8 being connected to the pouring slot 3 via a channel 10.
  • the channel 10 is delimited by a lower wall 11 and an upper wall 12 and on the end face by a lower segment of the upper roller 2 and also by an upper segment of the lower roller 1.
  • An inductor 13 is inserted in the lower wall 11 of the channel 10. The electrical connections of the inductor and its cooling devices are not shown.
  • FIG. 2 additionally shows the lateral delimitation of the channel 10 by a side wall 14 and a further side wall 15.
  • Fig. 2 shows that the lower roller has a much wider jacket 16 than the upper roller 2, the jacket 17 is narrower.
  • the width of the top roller 2 corresponds to the width of a strip to be cast.
  • the section of a strip casting machine shown in FIG. 3 shows a recess 18 in the lower wall 11, into which the inductor 13 is inserted.
  • the main area of action of the inductor 13 is indicated and indicated by a circular section 19 such that the area in which the melt 9 is heated up in the channel 10 is limited to a very limited part of the channel 10.
  • the opposite part of the jacket 16 of the lower roller 1 is also preheated via the inductor 13 and thus the cooling effect of the jacket 16, which is more intensive without this preheating, is locally reduced.
  • the gap 20 can even be chosen to be relatively large, for example 2 mm, so that less stringent requirements for the tolerances in the manufacture of the lower roller 1 or the refractory edge of the gap 20 have to be addressed.
  • Dashed lines 21 and 21 a indicate that a gap 21 of the corresponding side walls 14 and 15 of the channel 10 with the lower roller 1 and a gap 21 a with the upper roller 2, which extends towards the pouring slot 3, is also present laterally.
  • the melt solidifies on the jacket 16 due to its cooling effect to form a lower belt 22 which gradually increases in thickness, which unites with a generally thinner upper belt 23 in the casting slot to form the finished belt 24.
  • FIG. 4 additionally shows a further inductor 25 assigned to the respective lateral gap 21 of the corresponding side walls 14 and 15 of the channel 10 (not shown), which extends only to a partial area of the lateral gap 21.
  • the melt 9 and the lower roller 1 can be on both sides of one From the heating area of the inductor 13, a section directed towards the casting slot 3 is fed inductively via a further electromagnetic field.
  • the column 21 a formed by the side walls 14 and 15 with the top roller 2 can be heated by inductors 28.
  • FIG. 4 further shows the channel 10 as an open channel, which is fed from the refractory container 8 via a dip tube 26.
  • the feed is metered by an adjustable stopper 27.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP88105666A 1987-07-29 1988-04-09 Verfahren zum Herstellen dünner Metallbänder Expired - Lifetime EP0301170B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88105666T ATE58660T1 (de) 1987-07-29 1988-04-09 Verfahren zum herstellen duenner metallbaender.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3725010A DE3725010C1 (de) 1987-07-29 1987-07-29 Verfahren zum Herstellen duenner Metallbaender
DE3725010 1987-07-29

Publications (2)

Publication Number Publication Date
EP0301170A1 EP0301170A1 (de) 1989-02-01
EP0301170B1 true EP0301170B1 (de) 1990-11-28

Family

ID=6332544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88105666A Expired - Lifetime EP0301170B1 (de) 1987-07-29 1988-04-09 Verfahren zum Herstellen dünner Metallbänder

Country Status (4)

Country Link
EP (1) EP0301170B1 (ja)
JP (1) JPH0661597B2 (ja)
AT (1) ATE58660T1 (ja)
DE (1) DE3725010C1 (ja)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3802202A1 (de) * 1988-01-26 1989-08-03 Voest Alpine Ag Verfahren zum stranggiessen eines duennen bandes oder einer duennen bramme sowie vorrichtung zur durchfuehrung des verfahrens
US4828012A (en) * 1988-04-08 1989-05-09 National Aluminum Corporation Apparatus for and process of direct casting of metal strip
JPH0299248A (ja) * 1988-10-03 1990-04-11 Nippon Kinzoku Kogyo Kk 金属薄帯連続鋳造装置用注湯ノズル
US5293926A (en) * 1992-04-30 1994-03-15 Allegheny Ludlum Corporation Method and apparatus for direct casting of continuous metal strip
DE4234255C2 (de) * 1992-10-10 1994-09-15 Sundwiger Eisen Maschinen Vorrichtung zum Bandgießen aus einem Gießgefäß und einem Paar einen Gießspalt bildenden gekühlten Gießrädern
DE4410511A1 (de) * 1994-03-28 1995-10-05 Didier Werke Ag Verfahren und Vorrichtung zum endabmessungsnahen Vergießen von Schmelzen
KR100957038B1 (ko) * 2007-12-21 2010-05-13 한국기계연구원 판재 연속 주조장치
EP2357051A1 (de) * 2010-01-15 2011-08-17 Siemens Aktiengesellschaft Verfahren zum Betrieb einer Gießwalzverbundanlage, Gießwalzverbundanlage und Steuer- und/oder Regeleinrichtung für eine Gießwalzverbundanlage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61253149A (ja) * 1985-04-12 1986-11-11 Nippon Kinzoku Kogyo Kk 金属薄板の連続鋳造による製造装置

Also Published As

Publication number Publication date
EP0301170A1 (de) 1989-02-01
ATE58660T1 (de) 1990-12-15
JPH01170552A (ja) 1989-07-05
JPH0661597B2 (ja) 1994-08-17
DE3725010C1 (de) 1988-09-29

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