EP0043987B1 - Vorrichtung zum Stranggiessen von Metall in einem geschlossenen Eingiessystem - Google Patents

Vorrichtung zum Stranggiessen von Metall in einem geschlossenen Eingiessystem Download PDF

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Publication number
EP0043987B1
EP0043987B1 EP81105098A EP81105098A EP0043987B1 EP 0043987 B1 EP0043987 B1 EP 0043987B1 EP 81105098 A EP81105098 A EP 81105098A EP 81105098 A EP81105098 A EP 81105098A EP 0043987 B1 EP0043987 B1 EP 0043987B1
Authority
EP
European Patent Office
Prior art keywords
mold
mould
equipment according
pouring
metal
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
EP81105098A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0043987A1 (de
Inventor
Wilfried Dr. Heinemann
Theodor Prof. Rummel
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 Concast AG
Original Assignee
Concast Holding 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 Concast Holding AG filed Critical Concast Holding AG
Priority to AT81105098T priority Critical patent/ATE6476T1/de
Publication of EP0043987A1 publication Critical patent/EP0043987A1/de
Application granted granted Critical
Publication of EP0043987B1 publication Critical patent/EP0043987B1/de
Expired 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
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • 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
    • B22D11/10—Supplying or treating molten metal
    • 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
    • B22D11/01—Continuous casting of metals, i.e. casting in indefinite lengths without moulds, e.g. on molten surfaces
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
    • B22D11/047—Means for joining tundish to mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D39/00—Equipment for supplying molten metal in rations
    • B22D39/003—Equipment for supplying molten metal in rations using electromagnetic field

Definitions

  • the invention relates to a device for continuous casting of metal with a closed pouring system, wherein a refractory distribution vessel pouring spout is connected to a cooled continuous mold, which has an approximately horizontal longitudinal axis.
  • the metal When continuously casting metal with a continuous mold, the metal can be fed in an open or in a closed pouring system.
  • Vertical and curved continuous casting plants are usually operated with an open pouring system, ie there is no connection between the distributor vessel and the continuous mold.
  • Horizontal continuous casters are almost exclusively built with a closed casting system, whereby refractory parts of the Veiteilervessel are connected to the pouring side of the continuous mold.
  • the closed pouring system offers the following advantages over the open pouring system. Contact of the Giesmetalles with atmospheric oxygen between the distri l ergefäss and the open-ended mold is etc. There is no bath level regulation in the mold.
  • a horizontal continuous casting installation is known from D E-OS No. 1558224, in which a distributor vessel is connected to a water-cooled mold.
  • the metal flows from the tundish into the mold without air admission, the flow speed being regulated by the pull-out speed of the strand.
  • the liquid Metai! begins to solidify not only in the mold, but already in the area of the connection level between the mold and the distributor vessel outlet opening, which leads to metal welds on the wall of the distributor vessel spout and as a result of the tensile force exerted on the strand by the pull-off rollers on the be; 3 its solidified strand circumference leads. This causes a considerable disturbance in the casting process and considerable material defects in the finished product.
  • a horizontal continuous casting method in which the metal is passed from a verte vessel through a refractory, nozzle-like expanding connecting line into the mold.
  • the liquid metal is subjected to electromagnetic forces in this nozzle-like connecting line, which cause acceleration in the direction of flow on the circumference of the metal strand.
  • the metal flow preformed and accelerated in the nozzle-like enlargement is intended to produce a free annular space in the suddenly expanded mold cross-section, whereby a stable meniscus is to be favored.
  • the device for generating the electromagnetic forces along the nozzle-like connecting line corresponds to a stator of a linear motor.
  • a neutral gas under pressure which is at least equal to the maximum ferrostatic pressure in this area, is introduced into the free annular space via a plurality of slots.
  • these complex process steps such as the application of an axial acceleration of the melt in the connecting line and the pressurization in the annular space, malfunctions in the annular space cannot be completely avoided when the line is at a standstill or when the strand extraction movement changes.
  • the injected inert gas can be entrained by the moving strand because of the lower ferrostatic pressure on the top side of the strand compared to the bottom side of the strand. On the one hand, this can produce additional disturbances in the annulus and, on the other hand, strand faults, particularly on the strand surface.
  • the welds already mentioned can occur on the end face of the nozzle-like connecting line with the disadvantages mentioned.
  • a method and a device for horizontal casting is further known from DE-OS No. 2756112.
  • liquid metal is drawn off from a lateral pouring opening of a container.
  • the gravity of the pouring casting metal is compensated for in a partial area after the pouring opening by an immaterial electromagnetic strand support and the ferrostatic pressure is kept under control by an additional electromagnetic coil.
  • These electromagnetic coil combined with the electromagnetic gravity compensation can be used on the one hand on a system for mold-free casting or on the other hand on a system with a horizontally oscillating mold and a fixed pouring opening.
  • the invention has for its object to solve the known difficulties at the connection point between a refractory distribution vessel pouring spout and a mold, such as welds, strand defects, openings, etc. with simple means.
  • the performance of such continuous casting plants is to be increased by extending the possible casting time.
  • the device according to the invention is characterized by the features according to claim 1.
  • the invention enables the advantages of the closed casting system for continuous casting with a horizontally arranged mold to be exploited using an inexpensive device.
  • the disadvantages known from the prior art, such as welds, string faults and breakthroughs can be eliminated. Longer sequences of pouring ladles can be poured due to significantly reduced wear in the pouring spout, which significantly reduces dead times and maintenance costs.
  • An additional reduction in wear on the refractory distributor spout can be achieved if, according to a further feature of the invention, the electromagnetic coil is arranged on both sides of the connection plane.
  • the invention further proposes to choose the outlet opening of the tundish spout and the mold inlet opening in the area of the connection level as well as the metal melt from the outlet opening by means of the electromagnetic Keep the field away.
  • outlet opening of the distribution vessel pouring spout is smaller than the mold inlet opening in the region of the connection plane.
  • the quality of the strand surface can be improved according to an additional feature if a mold part with a reduced thermal conductivity compared to the flow mold is arranged between the refractory distribution vessel pouring spout and the flow mold.
  • An additional improvement in the constricting effect of the electromagnetic field in the mold cavity can be achieved if the mold part consists of paramagnetic material with a correspondingly low thermal conductivity.
  • a refractory distribution vessel pouring spout 2 is connected to a cooled continuous mold 3 with a horizontal longitudinal axis 14 of the mold, which represents a closed pouring system.
  • a connection level 4 is located between the flow mold 3 and the distributor vessel pouring spout 2.
  • An electromagnetic coil 16, which causes a constriction 7 of the steel flowing into the flow mold 3, is arranged on both sides of the connection level 4.
  • a free annular space 8 is formed, so that the incoming steel cannot yet touch the mold 3 in the area of the connection plane 4.
  • the distribution vessel pouring spout 2 is part of a distribution vessel, not shown.
  • the continuous mold 3 is followed, as a rule, by known support guide elements (not shown) and a strand extraction unit for continuous or intermittent strand extraction.
  • a distance 15 between a water-cooled, electromagnetic, single-wind coil 16 and the mold cavity 19 below the horizontal longitudinal axis 14 of the continuous mold 3 is smaller than a distance 18 above the longitudinal axis 14.
  • This lining is advantageously made of paramagnetic material, such as stainless steel. So that no vacuum forms in the free annular space 8 (FIG. 1), which would counteract the constriction 7, an inert gas is fed from a container 22 via a pressure reducing valve 23 through fine feed slots 24 into the annular space 8. This pressure is adjusted to the atmospheric pressure and is so with less than the ferrostatic pressure of the melt.
  • the vacuum in the annular space 8 can also be used to introduce a lubricant for the strand.
  • a weakly oval-shaped electromagnetic coil 31 is arranged around a round strand cross section 32.
  • the method and the device according to the invention can basically be used for a large number of metals.
  • iron / carbon alloys can also be cast. Due to the free design possibility of the coil, only a few restrictions with regard to different strand formats are effective when using the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Continuous Casting (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Baking, Grill, Roasting (AREA)
  • Food-Manufacturing Devices (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP81105098A 1980-07-11 1981-07-01 Vorrichtung zum Stranggiessen von Metall in einem geschlossenen Eingiessystem Expired EP0043987B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81105098T ATE6476T1 (de) 1980-07-11 1981-07-01 Vorrichtung zum stranggiessen von metall in einem geschlossenen eingiessystem.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5347/80 1980-07-11
CH5347/80A CH648500A5 (de) 1980-07-11 1980-07-11 Verfahren und vorrichtung zum stranggiessen von metall in einem geschlossenen eingiesssystem.

Publications (2)

Publication Number Publication Date
EP0043987A1 EP0043987A1 (de) 1982-01-20
EP0043987B1 true EP0043987B1 (de) 1984-03-07

Family

ID=4292056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105098A Expired EP0043987B1 (de) 1980-07-11 1981-07-01 Vorrichtung zum Stranggiessen von Metall in einem geschlossenen Eingiessystem

Country Status (10)

Country Link
US (1) US4450892A (pt)
EP (1) EP0043987B1 (pt)
JP (1) JPS5744454A (pt)
KR (1) KR840002039B1 (pt)
AT (1) ATE6476T1 (pt)
BR (1) BR8104428A (pt)
CA (1) CA1176427A (pt)
CH (1) CH648500A5 (pt)
DE (1) DE3162508D1 (pt)
ES (1) ES8205141A1 (pt)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57209752A (en) * 1981-06-17 1982-12-23 Kawasaki Heavy Ind Ltd Horizontal continuous casting installation
DE3131353A1 (de) * 1981-08-07 1983-02-24 Neue Technik Entwicklung und Vertrieb F. Block, 5106 Roetgen "verfahren und vorrichtung zum abdichten des spaltes zwischen relativ zueinander bewegten einrichtungen"
DE3136847C1 (de) * 1981-09-16 1982-10-28 Korf Engineering GmbH, 4000 Düsseldorf Verfahren und Vorrichtung zum Horizontalstranggiessen von fluessigen Metallen,insbesondere von Stahl
JPS5886959A (ja) * 1981-11-18 1983-05-24 Kawasaki Heavy Ind Ltd 水平連続鋳造方法
KR870000714B1 (ko) * 1981-11-18 1987-04-09 하세가와 겐고오 수평 연속 주조방법
CH665369A5 (de) * 1984-03-07 1988-05-13 Concast Standard Ag Verfahren zur regelung des durchflusses einer metallschmelze beim stranggiessen, und eine vorrichtung zur durchfuehrung des verfahrens.
JPS61111747A (ja) * 1984-11-07 1986-05-29 Nippon Kokan Kk <Nkk> 鋼板の連続鋳造装置
JPS61186150A (ja) * 1985-02-13 1986-08-19 Sumitomo Light Metal Ind Ltd 電磁場浮遊鋳造法
US4693299A (en) * 1986-06-05 1987-09-15 Westinghouse Electric Corp. Continuous metal casting apparatus
US4741383A (en) * 1986-06-10 1988-05-03 The United States Of America As Represented By The United States Department Of Energy Horizontal electromagnetic casting of thin metal sheets
US4842170A (en) * 1987-07-06 1989-06-27 Westinghouse Electric Corp. Liquid metal electromagnetic flow control device incorporating a pumping action
US4846255A (en) * 1987-10-28 1989-07-11 The United States Of America As Represented By The United States Department Of Energy Electromagnetic augmentation for casting of thin metal sheets
JPH04197559A (ja) * 1990-11-27 1992-07-17 Nkk Corp 鋼の連続鋳造法
US5379828A (en) * 1990-12-10 1995-01-10 Inland Steel Company Apparatus and method for continuous casting of molten steel
US5494095A (en) * 1992-04-08 1996-02-27 Inland Steel Company Apparatus for continuous casting of molten steel
IT1316299B1 (it) * 2000-01-26 2003-04-10 Danieli Off Mecc Procedimento e dispositivo per migliorare la qualita' di corpimetallici colati in continuo
DE10210430A1 (de) * 2002-03-09 2003-09-18 Sms Demag Ag Vorrichtung zur Schmelztauchbeschichtung von Metallsträngen

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA878383A (en) * 1971-08-17 Schloemann Aktiengesellschaft Mold for the simultaneous continuous casting of a plurality of individual strands
DE1558224C3 (de) * 1967-06-24 1973-12-06 Theodor Prof. Dr.-Ing. 3000 Hannover-Kirchrode Rummel Verfahren und Vorrichtung zum horizontalen Stranggießen von schmelz flussigen Metallen, insbesondere Stahl
US3547182A (en) * 1968-02-21 1970-12-15 Nat Steel Corp Continuous casting apparatus
US3612149A (en) * 1968-09-05 1971-10-12 Concast Inc Continuous casting method
JPS5027028B1 (pt) * 1969-11-19 1975-09-04
US3630266A (en) * 1969-11-21 1971-12-28 Technicon Corp Continuous casting process
US3721287A (en) * 1971-11-19 1973-03-20 Aluminum Co Of America Method of continuously casting plate with textured surface
FR2252154B1 (pt) * 1973-11-28 1976-12-03 Siderurgie Fse Inst Rech
FR2316026A1 (fr) * 1975-07-04 1977-01-28 Anvar Dispositif electromagnetique de confinement des metaux liquides
JPS5232824A (en) * 1975-09-09 1977-03-12 Nippon Steel Corp Method of casting metal melts
DE2722969A1 (de) * 1976-05-24 1977-12-15 Bailey Ltd C H Schwimmdock
CH604974A5 (pt) * 1976-12-17 1978-09-15 Concast Ag
FR2397251A1 (fr) * 1977-07-12 1979-02-09 Anvar Procede et dispositif pour diriger, en l'absence de parois, des veines metalliques liquides, notamment pour les centrer, les guider ou controler leur forme circulaire
CH625728A5 (pt) * 1977-12-27 1981-10-15 Concast Ag
US4156451A (en) * 1978-02-07 1979-05-29 Getselev Zinovy N Continuous or semi-continuous metal casting method

Also Published As

Publication number Publication date
ES504334A0 (es) 1982-06-01
US4450892A (en) 1984-05-29
ES8205141A1 (es) 1982-06-01
JPS5744454A (en) 1982-03-12
KR830005941A (ko) 1983-09-14
BR8104428A (pt) 1982-03-30
DE3162508D1 (en) 1984-04-12
JPS6257420B2 (pt) 1987-12-01
KR840002039B1 (ko) 1984-11-06
ATE6476T1 (de) 1984-03-15
CH648500A5 (de) 1985-03-29
EP0043987A1 (de) 1982-01-20
CA1176427A (en) 1984-10-23

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