EP1187943A1 - Procede et dispositif de realisation en continu de tiges coulees ou refondues selon un procede sous laitier electroconducteur - Google Patents

Procede et dispositif de realisation en continu de tiges coulees ou refondues selon un procede sous laitier electroconducteur

Info

Publication number
EP1187943A1
EP1187943A1 EP00929525A EP00929525A EP1187943A1 EP 1187943 A1 EP1187943 A1 EP 1187943A1 EP 00929525 A EP00929525 A EP 00929525A EP 00929525 A EP00929525 A EP 00929525A EP 1187943 A1 EP1187943 A1 EP 1187943A1
Authority
EP
European Patent Office
Prior art keywords
strand
elements
pressed
contact
axis
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.)
Granted
Application number
EP00929525A
Other languages
German (de)
English (en)
Other versions
EP1187943B1 (fr
Inventor
Harald Holzgruber
Wolfgang Holzgruber
Bertram Ofner
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.)
Inteco Internationale Techinsche Beratung GmbH
Original Assignee
Inteco Internationale Techinsche Beratung 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 Inteco Internationale Techinsche Beratung GmbH filed Critical Inteco Internationale Techinsche Beratung GmbH
Publication of EP1187943A1 publication Critical patent/EP1187943A1/fr
Application granted granted Critical
Publication of EP1187943B1 publication Critical patent/EP1187943B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
    • B22D23/06—Melting-down metal, e.g. metal particles, in the mould
    • B22D23/10—Electroslag casting

Definitions

  • the invention relates to a process for the continuous production of strands or ingots from metal, in particular from steels and Ni and Co-based alloys by the process of remelting electroslag or electroslag casting in downwardly open, water-cooled molds, and a suitable one for this Contraption.
  • Sh. Sasayama and co-workers developed a process for the continuous remelting of self-consumable electrodes using the electro-slag remelting process in a water-cooled mold with continuous strand removal by means of a removal device.
  • AE Vokov and co-workers describe a continuous process for melting grinding dust in a slag bath heated by a non-consumable electrode in a water-cooled mold with continuous strand removal by means of a so-called block, clamping and removal traction device.
  • An oxy-fuel cutting device arranged in the system enables the remelting strands produced to be cut to length.
  • the remelting rates are given as 210-240 kg / h for strands with a diameter of 300 mm and are thus 0.7-0.8 kg / h / mm strand diameter.
  • AT 399 463 B shows a process for electro-slag continuous casting of steels and alloys, in which the casting level in the water-cooled mold is covered by an electrically conductive slag and in which the slag bath is heated, for example, when the current passes through immersed auxiliary electrodes.
  • the casting speed should be set so that it is at least 1.5 times the melting rate customary in electro-slag remelting and at most 50% of the casting speed in conventional continuous casting. No information is given on the type of strand withdrawal.
  • Extraction devices for continuously operating electro-slag plants must also be able to remove either all or at least part of the melt stream from the strand produced without interruption, taking into account the guiding of the stripped strand at a small distance from the lower edge of the mold give is.
  • roller elements Both roller elements and movable jaw systems are known for the purpose of strand withdrawal.
  • Roller elements have the advantage that the contact points with the strand surface change constantly when the strand is moving, so that an inadmissible cooling of the strand surface is avoided even when using water-cooled rollers.
  • clamping jaws with a relatively short stroke have advantages, since a fixed current-conducting connection can be comparatively easily established by using flexible line elements, such as cables or tapes.
  • the clamping jaws participating in the strand withdrawal movement are in constant contact with the strand surface during the clamping phase, so that in the event of a long clamping phase an inadmissible cooling of the strand surface can be brought about at the contact points. For this reason, the engagement times of jaw elements must not be selected too long, although it can be helpful to borrowed, as with forging tools, to allow a certain heating of the jaw contact surface.
  • the inventor has set himself the goal of improving the known methods and devices while avoiding the disadvantages identified, and the task of continuously or step-wise stripping from the mold in the electroslag removal process, which differs considerably from continuous casting. melt or cope with electro slag cope.
  • the strand emerging from the mold is pressed against at least one guide element which is rigidly arranged with respect to its arrangement with respect to the mold axis by at least one clamping element arranged opposite it in such a way that the contact points of the strand surface and the guide or clamping element change constantly, at least one this element is driven for the purpose of strand withdrawal, while the other participates in the strand movement and at least one of these elements can be used to make contact with a power source.
  • Roller elements consisting of one or more rollers are best suited as rigid guide elements. It has proven to be advantageous that the strand emerging from the mold is pressed against one or more rollers, the axes of which are arranged at 90 ° to the strand axis. In addition, the strand withdrawal is to be effected in that at least one roller against which the strand is pressed is driven.
  • the melt flow is expediently discharged via the clamping jaws, which can be pressed on alternately, the pressing times of the individual jaws not exceeding two minutes.
  • the clamping jaws can preferably also be designed as oscillating jaws which roll along the strand surface during the clamping cycle, similar to a roller with a large radius.
  • the strand withdrawal movement can then be carried out by one or more driven rollers or by at least two clamping jaws, one of which is always pressed on and at the same time causes the withdrawal by a suitable device, while the second is withdrawn and returned to its upper position in relation to the strand withdrawal becomes.
  • the non-driven rollers or pressed-on clamping jaws make the strand withdrawal movement, whereby one of the non-driven rollers can be designed as a measuring roller.
  • a device suitable for carrying out the method according to the invention consists of a rigid frame aligned with respect to the mold axis with at least two water-cooled guide rollers, of which at least one is driven, and at least two clamping jaws which can be pressed against the strand surface and are connected to a power source.
  • a water-cooled mold 10 which can also be designed as a funnel mold known per se, there is a slag bath 12 in which a self-consumable electrode 14 is melted. The molten metal is collected in a melt pool 16; whose melt level is designated 18.
  • a strand 20 formed after solidification is drawn down from the mold 10 in the direction x by a driven roller 24, which is arranged in a rigid frame 22 with respect to the mold axis A.
  • a guidance of the strand 20 parallel to the mold axis A is effected by the aforementioned driven roller 24 and further rollers 24 a , against which the strand 20 is pressed alternately by one of two clamps 26 which can be moved in the vertical direction.
  • a holding device 28 for the lower of the two clamps 26 carries an autogenous flame cutting device 30, with which the strand 20 produced can be cut to length in the phase of the engagement of these clamps 26.
  • the terminals 26 are connected to a current source 36 via flexible cables 32 and high-current lines 34.
  • the alternately pressed-on jaws of the clamping jaws 26 are designed as oscillating clamping jaws, the axes of which are arranged in the rigid frame 22 in such a way that the clamps 26 are movable in the direction of withdrawal of the strand x and the surface in contact with the strand 20 is curved with a radius corresponding to its center distance, so that it rolls along the surface of the strand in the pressed state.
  • the second oscillating jaw is engaged - that is, pressed on - the jaw is withdrawn from the surface of the strand and the rocker is moved about the axis against the direction of the strand withdrawal into an upper starting position, where it remains until the jaw is pressed against the surface of the strand again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Forging (AREA)
  • Continuous Casting (AREA)

Abstract

La présente invention concerne un procédé, et un dispositif permettant de mettre ne oeuvre ce procédé, servant à la réalisation en continu de tiges ou de barres métalliques, en particulier constituées d'aciers ainsi que d'alliages au Ni et au Co, grâce au procédé de refonte sous laitier électroconducteur ou de coulée continue sous laitier électroconducteur dans des coquilles (10) ouvertes vers le bas, refroidies par eau. La tige (20) sortant par le bas de la coquille (10) subit, au niveau d'au moins un élément de guidage (24, 24a) fixe par rapport à l'axe (A) de la coquille, une pression exercée par au moins un élément de serrage (26) opposé audit élément de guidage, de sorte que les zones de la surface de la tige étant en contact avec les éléments de guidage ou de serrage (24, 26) se trouvent modifiées durant de courts intervalles de temps. Au moins un desdits éléments est entraîné de manière à tirer la tige, alors que les autres suivent le mouvement de la tige et qu'au moins un desdits éléments permet d'établir un contact avec une source de courant.
EP00929525A 1999-06-08 2000-05-12 Procede et dispositif de realisation en continu de tiges coulees ou refondues selon un procede sous laitier electroconducteur Expired - Lifetime EP1187943B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0100999A AT408528B (de) 1999-06-08 1999-06-08 Verfahren und vorrichtung zur kontinuierlichen herstellung von gegossenen oder umgeschmolzenen strängen nach einem elektroschlacke-verfahren
AT100999 1999-06-08
PCT/EP2000/004290 WO2000075386A1 (fr) 1999-06-08 2000-05-12 Procede et dispositif de realisation en continu de tiges coulees ou refondues selon un procede sous laitier electroconducteur

Publications (2)

Publication Number Publication Date
EP1187943A1 true EP1187943A1 (fr) 2002-03-20
EP1187943B1 EP1187943B1 (fr) 2003-07-16

Family

ID=3504834

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00929525A Expired - Lifetime EP1187943B1 (fr) 1999-06-08 2000-05-12 Procede et dispositif de realisation en continu de tiges coulees ou refondues selon un procede sous laitier electroconducteur

Country Status (6)

Country Link
US (2) US6568463B1 (fr)
EP (1) EP1187943B1 (fr)
JP (1) JP4563631B2 (fr)
AT (1) AT408528B (fr)
DE (2) DE10023098A1 (fr)
WO (1) WO2000075386A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT408528B (de) * 1999-06-08 2001-12-27 Inteco Int Techn Beratung Verfahren und vorrichtung zur kontinuierlichen herstellung von gegossenen oder umgeschmolzenen strängen nach einem elektroschlacke-verfahren
EP2690981A4 (fr) 2011-03-28 2016-08-03 Royal Canadian Mint Monnaie Royale Canadienne Système et procédé pour réduire le matériau excédentaire sur les produits de monnaie
JP6343949B2 (ja) * 2014-02-04 2018-06-20 日立金属株式会社 鋳片引抜装置および鋳片引抜方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3752216A (en) * 1969-05-14 1973-08-14 Sandel Ind Inc Apparatus for homogeneous refining and continuously casting metals and alloys
JPS4840532B1 (fr) * 1970-04-03 1973-12-01
US4108237A (en) * 1977-03-18 1978-08-22 Mikhail Yakovlevich Brovman Machine for semicontinuous casting of metals
JPH0635045B2 (ja) * 1986-06-26 1994-05-11 大同特殊鋼株式会社 エレクトロスラグ再溶解炉におけるインゴツト引抜装置
JPS6372839A (ja) * 1986-09-16 1988-04-02 Daido Steel Co Ltd エレクトロスラグ再溶解におけるインゴツト引抜速度制御方法および制御装置
JPS6372840A (ja) * 1986-09-16 1988-04-02 Daido Steel Co Ltd エレクトロスラグ再溶解法
AT399463B (de) * 1987-03-03 1995-05-26 Inteco Int Techn Beratung Verfahren zum elektroschlacke-stranggiessen von stählen und legierungen
DE4323326C2 (de) * 1993-07-07 1997-02-06 Mannesmann Ag Auszieheinrichtung einer Stranggießanlage
AT406384B (de) * 1996-01-29 2000-04-25 Inteco Int Techn Beratung Verfahren zum elektroschlacke-strangschmelzen von metallen
AT408528B (de) * 1999-06-08 2001-12-27 Inteco Int Techn Beratung Verfahren und vorrichtung zur kontinuierlichen herstellung von gegossenen oder umgeschmolzenen strängen nach einem elektroschlacke-verfahren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0075386A1 *

Also Published As

Publication number Publication date
US6568463B1 (en) 2003-05-27
DE10023098A1 (de) 2000-12-14
JP4563631B2 (ja) 2010-10-13
ATA100999A (de) 2001-05-15
US6834707B2 (en) 2004-12-28
EP1187943B1 (fr) 2003-07-16
DE50002922D1 (de) 2003-08-21
AT408528B (de) 2001-12-27
US20030111204A1 (en) 2003-06-19
WO2000075386A1 (fr) 2000-12-14
JP2003501267A (ja) 2003-01-14

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