EP0019118B1 - Einrichtung zum Umrühren von metallischen Schmelzen in Stranggiessanlagen - Google Patents

Einrichtung zum Umrühren von metallischen Schmelzen in Stranggiessanlagen Download PDF

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Publication number
EP0019118B1
EP0019118B1 EP80102230A EP80102230A EP0019118B1 EP 0019118 B1 EP0019118 B1 EP 0019118B1 EP 80102230 A EP80102230 A EP 80102230A EP 80102230 A EP80102230 A EP 80102230A EP 0019118 B1 EP0019118 B1 EP 0019118B1
Authority
EP
European Patent Office
Prior art keywords
string
magnetic field
pole pieces
rollers
strand
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
EP80102230A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0019118A1 (de
Inventor
Wolfgang Kindel
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to AT80102230T priority Critical patent/ATE3509T1/de
Publication of EP0019118A1 publication Critical patent/EP0019118A1/de
Application granted granted Critical
Publication of EP0019118B1 publication Critical patent/EP0019118B1/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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/122—Accessories for subsequent treating or working cast stock in situ using magnetic fields

Definitions

  • the invention relates to a device for stirring the still molten core of a strand leaving a continuous casting installation by means of a magnetic direct field, which emanates from an electromagnet with yokes arranged outside the rollers guiding the strand and passes through the strand horizontally, and by means of a direct current that perpendicularly intersects the magnetic field lines , the sliding or rolling contact members is introduced into the strand over opposite side surfaces of the strand.
  • Such a device is known from GB-A-872 591.
  • the yoke of the magnet used in this device which can be a permanent magnet or an electromagnet excited by direct current or alternating current, is arranged outside the guide rollers on a broad side of the strand and has the shape of a horseshoe magnet, the poles of which are angled or provided with pole attachments, that the pole faces are aligned with each other and with the narrow sides of the strand.
  • the space required for a device in this embodiment is considerable and is not available, for example, if two continuous casting plants are arranged directly next to one another.
  • Known devices for stirring metallic melts poured into a casting mold are based on the principle of a rotating magnetic field which is generated by magnets excited in multiple phases or a multi-pole DC magnet system, the excitation windings of which are switched on and off one after the other in a predetermined sequence (DE-PS 307 225 ).
  • the invention has for its object to provide a device for stirring metallic melts, which can be installed in continuous casting plants, even afterwards, and operated without problems.
  • this object is achieved in that the poles of the electromagnet oriented on one of the wide side surfaces of the strand are equipped with at least one pole shoe which surrounds the guide rollers in a fork-like manner, while a yoke anchor with further pole pieces of the same design is arranged on the other wide side surface of the strand is.
  • the space requirement of the device is small because the magnetic poles can be guided through the narrow spaces between the guide rollers up to the immediate vicinity of the strand surface with the aid of the pole shoes. Due to the one-sided arrangement of the field coils, strand guide rollers made of non-magnetic material need only be used on this side.
  • the direct current supply can additionally be improved in that the contact rollers are equipped with a gear-toothed surface. This prevents the disruptive influence of scale layers or other impurities on the strand surface.
  • a section of a strand 1 drawn from a casting mold, for example a slab, and rollers 2 guiding the strand are shown schematically.
  • an electromagnet 3 is arranged with, for example, three magnetic coils 4, which are fed from a DC power source, not shown, and which can be connected to a cooling device, not shown.
  • the poles 5 of the electromagnet terminate in pole shoes 6, which grip around one of the guide rollers in the manner of pliers and extend into the immediate vicinity of the surface of the strand.
  • the guide rollers 2a lying in the area of influence of the poles are expediently made of non-magnetic material.
  • the magnetic field lines emanating from the pole pieces can therefore penetrate the strand unaffected, as shown in broken lines in FIG. 1, and close via a yoke armature 7 with pole pieces 8 shaped in the same way on the other broad side of the strand.
  • each of the two electrodes arranged on one side of the strand can follow unevenness of the strand surface independently of the other side.
  • the electrodes can be arranged on the narrow sides or on the surfaces of the broad sides remaining between the magnet yoke and the side edges of the strand.
  • the device shown in the drawing allows in a particularly advantageous manner the formation of pronounced force centers and force-free zones, as indicated by the flow lines shown in dashed lines in FIG. 3.
  • the vertical expansion of the main flow field and the secondary flow fields which are to be regarded as turbulence within the main flow field, achieve vigorous, large-volume mixing of the still liquid strand core 12 (FIG. 2).
  • smaller turbulence-increasing eddies are formed.
  • the strand moves at the casting speed through this spatially fixed and essentially constant total flow field.
  • the distance between the magnetic poles and the width of the ends of the pole pieces facing the strand are selected transversely to the direction of movement of the strand such that the pole pieces with the largest strand format with their total width and with the smallest strand format with an approximately half the part their width lies in the area of the liquid strand core.
  • the distance between the magnetic poles and the width of the ends of the pole pieces facing the strand are selected transversely to the direction of movement of the strand such that the pole pieces with the largest strand format with their total width and with the smallest strand format with an approximately half the part their width lies in the area of the liquid strand core.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
EP80102230A 1979-05-09 1980-04-25 Einrichtung zum Umrühren von metallischen Schmelzen in Stranggiessanlagen Expired EP0019118B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80102230T ATE3509T1 (de) 1979-05-09 1980-04-25 Einrichtung zum umruehren von metallischen schmelzen in stranggiessanlagen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792918700 DE2918700A1 (de) 1979-05-09 1979-05-09 Einrichtung zum umruehren von metallischen schmelzen in stranggiessanlagen
DE2918700 1979-05-09

Publications (2)

Publication Number Publication Date
EP0019118A1 EP0019118A1 (de) 1980-11-26
EP0019118B1 true EP0019118B1 (de) 1983-05-25

Family

ID=6070320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80102230A Expired EP0019118B1 (de) 1979-05-09 1980-04-25 Einrichtung zum Umrühren von metallischen Schmelzen in Stranggiessanlagen

Country Status (4)

Country Link
EP (1) EP0019118B1 (enrdf_load_stackoverflow)
JP (1) JPS55149755A (enrdf_load_stackoverflow)
AT (1) ATE3509T1 (enrdf_load_stackoverflow)
DE (2) DE2918700A1 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2944760A1 (de) * 1979-11-06 1981-05-07 Siemens AG, 1000 Berlin und 8000 München Einrichtung zum umruehren von metallischen schmelzen in stranggiessanlagen
JPS63180089U (enrdf_load_stackoverflow) * 1987-05-12 1988-11-21
AU705854B2 (en) * 1995-11-14 1999-06-03 Lars Johansson Four-point seat belt
CN112077272B (zh) 2019-06-12 2021-06-15 宝山钢铁股份有限公司 板坯连铸二冷区的电磁搅拌装置及方法
CN116213664B (zh) * 2023-03-27 2025-01-21 东北大学 一种连铸二冷区分节辊式多模式电磁搅拌控流装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB872591A (en) * 1956-07-18 1961-07-12 British Iron Steel Research Improvements in or relating to the casting of metals

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1558209A1 (de) * 1967-03-06 1970-03-26 Demag Ag Verfahren und Vorrichtung zum Beeinflussen des noch nicht erstarrten Teiles des Giessstranges einer Stranggiessanlage
DE1583601A1 (de) * 1967-07-05 1970-09-17 Demag Elektrometallurgie Gmbh Verfahren und Vorrichtung zum Kuehlen eines schmelzfluessigen Metallstranges
US3882923A (en) * 1972-06-08 1975-05-13 Siderurgie Fse Inst Rech Apparatus for magnetic stirring of continuous castings
DE2757342C2 (de) * 1977-12-22 1983-02-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Anordnung zum elektrodynamischen Führen des flüssigen Sumpfes einer Metallbramme
SE410940C (sv) * 1978-04-05 1986-01-27 Asea Ab Forfaringssett for omroring vid strenggjutning
DE2827240A1 (de) * 1978-06-21 1980-01-03 Siemens Ag Einrichtung zum umruehren von metallischen schmelzen in stranggiessanlagen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB872591A (en) * 1956-07-18 1961-07-12 British Iron Steel Research Improvements in or relating to the casting of metals

Also Published As

Publication number Publication date
EP0019118A1 (de) 1980-11-26
JPS6236782B2 (enrdf_load_stackoverflow) 1987-08-08
ATE3509T1 (de) 1983-06-15
DE2918700A1 (de) 1980-11-13
DE3063435D1 (en) 1983-07-07
JPS55149755A (en) 1980-11-21

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