EP2677046A1 - Four et procédé de refusion sous laitier électroconducteur - Google Patents

Four et procédé de refusion sous laitier électroconducteur Download PDF

Info

Publication number: EP2677046A1
Authority: EP; European Patent Office
Prior art keywords: furnace; electrode; transformer; furnace head; crucible
Prior art date: 2012-06-19
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

EP13170502.2A

Other languages

German (de)

English (en)

Other versions

EP2677046B1 (fr

Inventor

Rolf Krepel

Ulrich Biebricher

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.)

ALD Vacuum Technologies GmbH

Original Assignee

ALD Vacuum Technologies 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.)

2012-06-19

Filing date

2013-06-04

Publication date

2013-12-25

2013-06-04 Application filed by ALD Vacuum Technologies GmbH filed Critical ALD Vacuum Technologies GmbH

2013-12-25 Publication of EP2677046A1 publication Critical patent/EP2677046A1/fr

2018-03-14 Application granted granted Critical

2018-03-14 Publication of EP2677046B1 publication Critical patent/EP2677046B1/fr

Status Active legal-status Critical Current

2033-06-04 Anticipated expiration legal-status Critical

Images

Classifications

- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting

Definitions

the invention relates to a furnace and a process for electroslag remelting (ESR), wherein the furnace comprises a frame, wherein the frame supports having a furnace head, wherein on the furnace head, an electrode can be arranged, wherein the electrode in a below the furnace head arranged crucible can be melted, wherein the furnace comprises a transformer which can provide electrical energy for melting the electrode.
ESR electroslag remelting
the advancing movement of the material electrode is performed by a furnace head of the furnace, such that the furnace head, on which the material electrode is held, can be moved in the direction of the crucible.
a movable material electrode is also provided in a sliding-block system. Furthermore, the material electrode can be held on a so-called electrode rod, via which the feed movement takes place.
the electrical energy needed to melt the material electrodes is provided by one or more transformers that can convert a high line voltage and low current into a low voltage at high current.
transformers can be connected in series one behind the other, in which case only the last transformer which is connected to the electrodes provides the electrical energy or the required current intensity for melting the electrode.
These transformers are regularly placed firmly in a transformer house remote from the furnace or in a separate space spaced from the frame of the furnace. It is also known to arrange a transformer on a purpose-built frame or a floor of a building, which surrounds the frame of the furnace, so that the transformer is approximated to the frame of the furnace.
the transformer has a relatively large weight, which must also be considered when choosing a location for the transformer. In particular, by a specially designed for the transformer room can be taken into account.
the transformer which provides the electrical energy for reflowing the electrode, must be connected to the furnace head by a plurality of cables.
the cables are at the furnace head in turn connected to a contact device which is connected to the electrode and a bottom plate of the crucible or a generated block so that the electrical energy can be passed through the electrode and the block.
the contact device may comprise coaxially arranged rails or tubes relative to the block, which have a comparatively large cross section, so that they do not significantly heat at a passage of the electrical energy. Since the furnace head is moved by a possible movement of the electrode relative to the fixed transformer, the cables between the transformer and the furnace head must be flexible.
the water-cooled high-current cables are subject to wear due to the relative movement of the frame and the transformer. Also, the cables, due to the magnetic fields surrounding the cables, can move and beat independently. It is therefore necessary to maintain the cables regularly and replace them if necessary. The same applies to the system required to cool the cables.
the present invention is therefore based on the object of proposing a furnace and a process for electroslag remelting, the more cost-effectively manufactured or can be carried out.
the furnace comprises a frame, the frame having supports supporting a furnace head, wherein an electrode may be disposed on the furnace head, the electrode being fusible in a crucible disposed below the furnace head, wherein the furnace comprises a transformer capable of providing electrical energy for reflowing the electrode, the transformer being fixedly attached to the furnace head.
the transformer is defined in particular as a transformer that provides the electrical energy with the appropriate current, which is suitable for melting the electrode.
the fixed location of the transformer on the furnace head involves direct placement of the transformer on the furnace head. Consequently, the transformer is located in the immediate vicinity of the electrode and can also follow a possible movement of the furnace head. It is therefore possible to dispense with the use of flexible and thus necessarily water-cooled high-current cables.
a power supply to the furnace head is thereby greatly simplified and reduced by the high-current cable electrical losses, resulting in an improvement in the efficiency of the furnace by reducing energy consumption. Also, it is no longer necessary to provide a space specially designed for the installation of the transformer. Although initially incurred increased costs for a design of the frame, as this must carry the transformer, but these costs are offset by the abandonment of the high current cable and the reduced operating costs of the furnace. Overall, this means lower investment and operating costs.
the supports of the frame may be formed pillar-shaped and form together with horizontal supports of the frame at least one supporting plane of the furnace head.
the supports of the frame may be formed pillar-shaped and form together with horizontal supports of the frame at least one supporting plane of the furnace head.
the transformer is fixedly arranged on the supporting plane.
the transformer can be arranged on the supporting plane, via which the electrode and the bottom plate of the crucible are supplied with electrical energy. Even with a vertical movement of the electrode relative to the transformer then it no longer requires an insert of flexible cables.
a contact device for transmitting the electrical energy to the electrode, an electrode rod and / or the bottom plate of the crucible may be formed on the furnace head, wherein the transformer may be arranged immediately adjacent to the contact device.
the contact device may have a sliding contact, via which the electrical energy from the transformer can be introduced directly into the electrode.
the bottom plate of the crucible via busbars or pipes with a relatively large cross-section may be firmly connected to the contact device.
the transformer may be fixed relative to the contact device.
the transformer may be fixed relative to the contact device.
the transformer can then be connected to the contact device by means of a rigid busbar device.
a rigid busbar device An example formed from simple busbars with a comparatively large cross-section busbar device is particularly easy and inexpensive to produce, in which case a distance of the transformer to the contact device would not even be particularly small.
the furnace head may be designed to be stationary for carrying out the process of electro-slag remelting and the crucible may have a base plate movable relative to the furnace head. The electrode could then still be arranged movably on the furnace head.
the bottom plate may be formed stationary, and the furnace head may be formed to be horizontally movable relative to the crucible.
the crucible may have a stationary bottom plate and the furnace head may be stationary relative to the bottom plate. In a melting of the electrode then the electrode would have to be lowered continuously in the direction of the bottom plate.
the electrode may also be movable relative to the furnace head. A relative mobility of the electrode to the furnace head, in particular in the horizontal direction, may always be required when the furnace is equipped with the electrode and this must be introduced, for example, from above into the crucible.
the furnace may be an electric slag remelting furnace under vacuum, under inert gas, under an air atmosphere or under pressure.
the oven comprises a rack, the rack having supports supporting a furnace head, the oven head being an electrode is arranged, wherein the electrode is melted in a crucible arranged below the furnace head, wherein the electrode is melted by a feed movement of the electrode into the crucible, wherein the furnace comprises a transformer which provides electrical energy for melting the electrode, wherein the Transformer is moved together with the furnace head.
FIG. 10 shows an electroslag remelting (ESU) furnace 10 under inert gas according to the prior art.
a frame 11 forms a support plane 12 of a furnace head 13, wherein the support plane 12 and the furnace head 13 is mounted on supports 14.
the furnace head 13 comprises a feed drive 15 for an electrode 16 with a spindle 17 and an electrode suspension 18 and an electrode rod 19 which connects the electrode 16 to the electrode suspension 18.
a feed drive 15 for an electrode 16 with a spindle 17 and an electrode suspension 18 and an electrode rod 19 which connects the electrode 16 to the electrode suspension 18.
two accessible platforms 20 and 21 two accessible platforms 20 and 21.
a crucible 22 is arranged, in which an ingot 23 and a molten bath 24 are already located.
a bottom plate 25 of the crucible 22 is stationary, that is, fixedly arranged on a foundation 26.
a protective gas chamber 27 is formed above the crucible 22, which allows melting of the electrode 16 under inert gas.
a transformer 29 for providing electrical energy is arranged, which is connected via a passage opening 30 in a wall 31 with a mounting space 32 for the frame 11.
the transformer 29 is connected by means of water-cooled high-current cable 33 via a contact device 34 with the electrode 16 and the crucible 22.
busbars 35 are arranged coaxially thereto. Further, located on the electrode rod 19, a sliding contact 36 of the contact device 34 for transmitting the electrical energy to the electrode 16.
Lowering of the electrode 16 in the crucible 22 is now at least partially effected by lowering the electrode suspension 18, so that the electrode 16 relative to Transformer 29 is moved.
Fig. 2 shows an embodiment of an electroslag remelting furnace (ESU) 37 according to the invention.
ESU electroslag remelting furnace
the furnace 37 corresponds in its essential structure to that in the Fig. 1 above-described oven.
a supporting plane 40 is formed on a frame 38 of the furnace 37 above supports 39.
a transformer 42 is arranged directly and rigid busbars 43 with a comparatively large cross-section with a Contact device 44 is connected, which in turn is connected to the electrode and the crucible, not shown here.
the known from the prior art high-current cable can thus be replaced inexpensively by simply trained busbars 43. This is possible only by the arrangement of the transformer 42 on the furnace head 41.

Landscapes

Engineering & Computer Science (AREA)
Chemical & Material Sciences (AREA)
Manufacturing & Machinery (AREA)
Materials Engineering (AREA)
Mechanical Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
Furnace Details (AREA)
Vertical, Hearth, Or Arc Furnaces (AREA)

EP13170502.2A 2012-06-19 2013-06-04 Four et procédé de refusion sous laitier électroconducteur Active EP2677046B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102012210281A DE102012210281A1 (de)	2012-06-19	2012-06-19	Ofen und Verfahren zum Elektroschlackeumschmelzen

Publications (2)

Publication Number	Publication Date
EP2677046A1 true EP2677046A1 (fr)	2013-12-25
EP2677046B1 EP2677046B1 (fr)	2018-03-14

Family

ID=48569972

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP13170502.2A Active EP2677046B1 (fr)	2012-06-19	2013-06-04	Four et procédé de refusion sous laitier électroconducteur

Country Status (4)

Country	Link
US (1)	US20130336353A1 (fr)
EP (1)	EP2677046B1 (fr)
CN (1)	CN103509954A (fr)
DE (1)	DE102012210281A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US10234206B2 (en)	2014-11-05	2019-03-19	Daido Steel Co., Ltd.	Electric arc furnace
US9903653B2 (en) *	2014-11-05	2018-02-27	Daido Steel Co., Ltd.	Melting furnace
MY190096A (en)	2014-11-05	2022-03-28	Daido Steel Co Ltd	Method of operating electric arc furnace
KR102656953B1 (ko) *	2016-02-16	2024-04-12	우데홀름스 악티에보라그	불활성 가스 또는 가압 일렉트로 슬래그 재용해 공정에서의 몰드강 제조용 몰드

Citations (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4951298A (en) *	1989-06-02	1990-08-21	Leybold Aktiengesellschaft	Closed remelting furnace having several horizontally movable furnace lower portions
DE19839432A1 (de) *	1998-08-29	2000-03-09	Ald Vacuum Techn Gmbh	Elektro-Schmelzanlage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
AT323351B (de) *	1970-09-11	1975-07-10	Inst Elektroswarki Patona	Anlage zum elektroschlacken-umschmelzen von metallen
US4280550A (en) *	1980-02-11	1981-07-28	Consarc Corporation	Electroslag remelting furnace with improved power connection

2012
- 2012-06-19 DE DE102012210281A patent/DE102012210281A1/de not_active Ceased
2013
- 2013-06-04 EP EP13170502.2A patent/EP2677046B1/fr active Active
- 2013-06-17 US US13/919,103 patent/US20130336353A1/en not_active Abandoned
- 2013-06-18 CN CN201310240886.2A patent/CN103509954A/zh active Pending

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4951298A (en) *	1989-06-02	1990-08-21	Leybold Aktiengesellschaft	Closed remelting furnace having several horizontally movable furnace lower portions
DE19839432A1 (de) *	1998-08-29	2000-03-09	Ald Vacuum Techn Gmbh	Elektro-Schmelzanlage

Also Published As

Publication number	Publication date
EP2677046B1 (fr)	2018-03-14
US20130336353A1 (en)	2013-12-19
CN103509954A (zh)	2014-01-15
DE102012210281A1 (de)	2013-12-19

Publication	Publication Date	Title
DE720950C (de)	1942-05-20	Verfahren und Ofen zum Schmelzen und Laeutern von Glas und anderen schwerschmelzenden Stoffen mittels elektrischen Stromes
DE4338555C1 (de)	1995-04-13	Gleichstrom-Lichtbogenofen
EP2783548B1 (fr)	2017-06-07	Four à arc électrique et son procédé de fonctionnement
EP2677046B1 (fr)	2018-03-14	Four et procédé de refusion sous laitier électroconducteur
EP0786531B1 (fr)	2000-07-19	Procédé et dispositif pour la refusion de métaux sous forme de barres
EP1849892A1 (fr)	2007-10-31	Four pour fusion d'éléments non métallique
DE69117782T2 (de)	1996-08-01	Herdboden für Gleichstrom-Lichtbogenöfen
AT410412B (de)	2003-04-25	Verfahren zum elektroschlacke umschmelzen von metallen
EP3707451A1 (fr)	2020-09-16	Four de fusion pourvu d'une tige d'électrode rotative et déplaçable simultanément
EP0378764A1 (fr)	1990-07-25	Installation de refusion par laitier électrique contenant une lingotière et une hotte
EP1006205B1 (fr)	2002-09-04	Procédé pour la fabrication des alliages homogenes par fusion et refusion
DE2833695C2 (de)	1986-07-10	Elektroschlackeumschmelzanlage mit koaxialen Strompfaden
DE102014014407A1 (de)	2016-04-07	Umschmelzofen mit einer Wägezelle
DE2804487C2 (de)	1981-12-24	Vorrichtung zum Auffüllen von Blockköpfen abgegossener Metallblöcke nach dem Elektroschlackenumschmelzverfahren
EP1969902B1 (fr)	2012-10-10	Dispositif de reajustement d'une electrode pour un four metallurgique
AT512471B1 (de)	2014-02-15	Umschmelzanlage für selbstverzehrende elektroden
DE2731227C2 (de)	1992-09-24	Vorrichtung zum Elektroschlacke-Umschmelzen von Abschmelzelektroden
EP1334214A1 (fr)	2003-08-13	Procede et dispositif de fabrication de lingots ou de barres metalliques par separation par fusion d'electrodes dans un bain de scories a fusion electrique
DE19839432C2 (de)	2000-12-07	Elektro-Schmelzanlage
EP2937431A1 (fr)	2015-10-28	Procédé et dispositif de fabrication d'une fonte métallique
DE909611C (de)	1954-04-22	Elektroden-Lichtbogenofen
DE1947786A1 (de)	1971-04-01	Vorrichtung zum Elektro-Schlacken-Umschmelzen von Metallen
DE2321447A1 (de)	1974-10-31	Anlage zum elektroschlacke-umschmelzen
DE1758384B2 (de)	1975-02-27	Verfahren zur Elektroschlackerafflnation von Metallen
DE1956126A1 (de)	1970-07-02	Verfahren,und Anlage zur Herstellung von aus Metallen,insbesondere aus Staehlen bestehenden Bloecken mit sich betraechtlich aendernden Querschnitten

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