US20180207719A1 - Electro-Slag Remelting Installation - Google Patents

Electro-Slag Remelting Installation Download PDF

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Publication number
US20180207719A1
US20180207719A1 US15/747,975 US201615747975A US2018207719A1 US 20180207719 A1 US20180207719 A1 US 20180207719A1 US 201615747975 A US201615747975 A US 201615747975A US 2018207719 A1 US2018207719 A1 US 2018207719A1
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US
United States
Prior art keywords
consumable electrode
mold
electro
slag remelting
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.)
Abandoned
Application number
US15/747,975
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English (en)
Inventor
Henrik Franz
Harald Scholz
Ulrich Biebricher
Thomas Kilzer
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.)
Filing date
Publication date
Application filed by ALD Vacuum Technologies GmbH filed Critical ALD Vacuum Technologies GmbH
Assigned to ALD VACUUM TECHNOLOGIES GMBH reassignment ALD VACUUM TECHNOLOGIES GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHOLZ, HARALD, FRANZ, HENRIK, BIEBRICHER, ULRICH, KILZER, Thomas
Publication of US20180207719A1 publication Critical patent/US20180207719A1/en
Abandoned 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
    • 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
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/06—Electrodes
    • H05B7/07—Electrodes designed to melt in use

Definitions

  • the invention relates to an electro-slag remelting installation with a mold, which is open at the top, and at least one consumable electrode, which extends into the mold.
  • the end of the consumable electrode that extends into the mold is melted off.
  • the melted metal falls through a liquid slag above a molten material in the mold, wherein a chemical reaction of the metal with the slag removes these impurities, such as sulfur and other non-metallic elements, from the metal. Inclusions in the electrode are thus transferred to the slag and do not reach the block.
  • the temperature required to melt the consumable electrode is generated by a high-ampere electric current, which flows through the consumable electrode, the slag, and the molten material.
  • the slag thereby represents an electrical resistor, which heats up due to the current passing through.
  • the slag is thereby liquefied and heated.
  • the two electrical poles of the slag form, on the one hand, the block building up in the mold, and on the other hand, the electrode. Due to the heat generated in the slag, the electrode melts at the interface to the slag.
  • the higher the temperature of the slag the higher is the melting rate of the electrode.
  • limits are set for the temperature level of the slag. For that reason, the melting rate can only be increased by increasing the cross-sectional area while keeping the slag bath temperature constant.
  • the consumable electrode is a rod-shaped structure with a round or rectangular cross-section, whose axis has a vertical orientation.
  • the melting rate thereby depends on the cross-sectional area in relation to a plane perpendicular to the axis of the electrode.
  • the diameter of the mold and the diameter of the electrode had been increased to achieve higher melting rates.
  • the mold diameter also determines the size of the blocks that are produced from the solidified molten material.
  • so-called funnel molds are utilized. In the upper, funnel-shaped sections of the mold, there is immersed the consumable electrode, whose cross-section is larger than the cross-section of the lower, smaller section of the funnel mold, which holds the block.
  • the object of the invention consists of creating an electro-slag remelting installation, which has an increased melting rate despite a small given cross-section of the consumable electrode.
  • the invention provides that the consumable electrode is oriented obliquely to a vertical.
  • the end surface of the consumable electrode extending into the mold thereby runs, corresponding to its inclination, obliquely to the axis of the consumable electrode.
  • the effective consumable surface no longer corresponds to the cross-sectional area in relation to a plane perpendicular to the axis of the electrode, but in relation to a horizontal plane.
  • the effective consumable surface thus increases by the inverse of the cosine of the angle between the vertical and the axis of the obliquely positioned consumable electrode.
  • the electrode Since the electrode is arranged obliquely, the overall height of the installation is decreased or given the same overall height, longer consumable electrodes can be used.
  • the oblique arrangement enables one to have available one or more electrodes near the later melt-off position to thereby minimize the time delay when changing electrodes.
  • the angle between the axis of the consumable electrode and the vertical is between 20 and 60°; in particular, it is 450°.
  • the invention provides that the consumable electrode is held in a refeeding unit that is designed in such a manner that the consumable electrode can be displaced along its obliquely positioned axis.
  • Such a refeeding unit may have a roller bearing. In this way, the weight of the consumable electrode can be distributed over multiple rollers.
  • At least two consumable electrodes can also be provided here, which are each furnished with a refeeding unit. This allows for a rapid exchange of electrodes. An electrode is being melted off, while the other is being prepared in its displacement system and is displaced into a position above the mold as soon as the preceding one is consumed.
  • the mold is cooled so that the molten material solidifies in its lower region and can be removed as a billet from the open bottom of the mold.
  • a device is provided that extracts molten material, whose lower section has solidified into a billet, through the bottom of the mold.
  • a separating apparatus can still be provided, which is designed in such a manner that it can separate the end piece of the billet emerging from the bottom of the mold.
  • a deflection device may be provided, which diverts the separated end pieces laterally to the mold, e.g., on to a conveyor belt, into a warehouse or storage facility.
  • FIG. 1 is a side view of the arrangement
  • FIG. 2 is a top view.
  • the installation according to the invention consists of a mold 1 , which consists of a tube body 2 having the same cross-section and a funnel 3 connecting on the top. Plunging into it is a consumable electrode 4 , whose axis 5 is arranged obliquely to a vertical 6 , which simultaneously forms the axis of tube body 2 . Consumable electrode 4 is seated on rollers 7 , which form an oblique plane. Consumable electrode 4 is held by a refeeding unit 8 , by means of which it can be refed into funnel 3 of mold 1 commensurate to the melt-off.
  • the tube body 2 contains the molten material that forms and that solidifies due to the cooling, not depicted here, in the lower region into a billet 10 , which is removed downwardly by an apparatus not depicted here and which, if applicable, may be divided into individual blocks by a separating device also not depicted here. These are diverted by a deflection apparatus, which is also not depicted in greater detail, in a lateral direction via means, e.g., a conveyor belt, into a warehouse or storage facility (not depicted).
  • slag layer 11 with a horizontally running surface, which is contacted by consumable electrode 4 .
  • the melting rate level is determined by the size of the consumable surface 13 , which is the end surface of consumable electrode 4 contacting slag layer 11 .
  • Consumable surface 13 runs horizontally and thus, depending on the inclination of consumable electrode 4 , oblique to its axis 5 . Since consumable electrode 4 is positioned obliquely, consumable surface 13 increases in relation to cross-sectional area 12 of consumable electrode 4 by an amount that is determined by the size of angle ⁇ between axis 5 of consumable electrode 4 and vertical 6 . For an angle of 45°, end surface 13 increases by approx. 40% compared to cross-sectional area 12 .
  • funnel 3 has an oblique infeed edge 14 on the side of consumable electrode 4 .
  • the energy for consuming electrode 4 is obtained from a power supply not depicted here.
  • Consumable electrode 4 , slag layer 11 as well as molten material 9 and billet 10 form parts of a current circuit, wherein slag layer 11 represents the largest resistance so that most of the energy is absorbed there.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Furnace Details (AREA)
US15/747,975 2015-07-27 2016-07-26 Electro-Slag Remelting Installation Abandoned US20180207719A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE102015112229.4 2015-07-27
DE102015112229 2015-07-27
DE102015117661.0A DE102015117661A1 (de) 2015-07-27 2015-10-16 Elektroschlacke-Umschmelzanlage
DE102015117661.0 2015-10-16
PCT/DE2016/100339 WO2017016549A1 (de) 2015-07-27 2016-07-26 Elektroschlacke-umschmelzanlage

Publications (1)

Publication Number Publication Date
US20180207719A1 true US20180207719A1 (en) 2018-07-26

Family

ID=57795326

Family Applications (1)

Application Number Title Priority Date Filing Date
US15/747,975 Abandoned US20180207719A1 (en) 2015-07-27 2016-07-26 Electro-Slag Remelting Installation

Country Status (8)

Country Link
US (1) US20180207719A1 (sl)
EP (1) EP3328576B1 (sl)
JP (1) JP2018522739A (sl)
CN (1) CN108136493A (sl)
DE (1) DE102015117661A1 (sl)
RU (1) RU2689832C1 (sl)
SI (1) SI3328576T1 (sl)
WO (1) WO2017016549A1 (sl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220051868A (ko) 2020-10-19 2022-04-27 삼성전자주식회사 반도체 장치의 제조를 위한 방법 및 컴퓨팅 장치

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US403326A (en) * 1889-05-14 Thomas j
US3677323A (en) * 1968-11-22 1972-07-18 Rheinstahl Huettenwerke Ag Process and apparatus for providing steel ingot
US3952792A (en) * 1974-07-25 1976-04-27 Consarc Corporation Method and apparatus for casting a plurality of ingots
JPS6442531A (en) * 1987-08-07 1989-02-14 Nippon Kokan Kk Arc melting apparatus
US8689856B1 (en) * 2013-03-05 2014-04-08 Rti International Metals, Inc. Method of making long ingots (cutting in furnace)

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE572870C (de) * 1926-02-10 1933-03-24 William E Moore Verfahren zur Behandlung von Eisen, das im geschmolzenen Zustand durch eine Schicht gluehenden Materials hindurchtropft
US3200232A (en) * 1963-06-11 1965-08-10 Soudure Electr Autogene Sa Process and apparatus for electric fusion welding
AT280505B (de) * 1967-12-27 1970-04-10 Boehler & Co Ag Geb Elektrodenhalter in Anlagen zum Elektroumschmelzen von Metallen, insbesondere von Stählen
SU403326A1 (ru) * 1971-01-04 1980-05-25 Институт электросварки им. Е.О.Патона Устройство дл электрошлаковой выплавки слитков
DE2319983B2 (de) * 1973-04-19 1975-11-06 Institut Elektroswarki Imeni E.O. Patona Akademii Nauk, Ukrainskoj Ssr, Kiew (Sowjetunion) Verfahren zur Herstellung metallischer Ringteile nach dem Elektroschlacke-Umschmelzverfahren
JPS5039601B2 (sl) * 1973-05-11 1975-12-18
GB1469850A (en) * 1974-12-30 1977-04-06 Inst Elektroswarki Patona Machine for electroslag refining and production of curved ingots
JPS53130231A (en) * 1977-04-21 1978-11-14 Mitsubishi Heavy Ind Ltd Manufacturing apparatus for curved tube with straight tube portion by continuous electroslag melting
DE2950531A1 (de) * 1979-12-15 1981-06-19 Leybold-Heraeus GmbH, 5000 Köln Elektroden-einspannvorrichtung fuer elektroumschmelzanlagen
ATA814479A (de) * 1979-02-15 1995-01-15 Leybold Heraeus Gmbh & Co Kg Elektroden-einspannvorrichtung für elektrodenumschmelzanlagen
AT367668B (de) * 1979-07-26 1982-07-26 Sp Pk I T Bjuro Elektrotermich Elektroschlackenumschmelzanlage
JPS6320151A (ja) * 1986-07-14 1988-01-27 Daido Steel Co Ltd エレクトロスラグ再溶解炉におけるインゴツト切断受支装置
CN2213593Y (zh) * 1994-12-28 1995-11-29 机械工业部沈阳铸造研究所 薄壁变曲面叶片板坯电渣熔铸装置
AT406384B (de) * 1996-01-29 2000-04-25 Inteco Int Techn Beratung Verfahren zum elektroschlacke-strangschmelzen von metallen
DE19839432C2 (de) 1998-08-29 2000-12-07 Ald Vacuum Techn Ag Elektro-Schmelzanlage
JP4654850B2 (ja) * 2005-09-09 2011-03-23 大同特殊鋼株式会社 再溶解炉に用いる電極へのスタブの取付け方法
JP4535097B2 (ja) * 2007-08-16 2010-09-01 大同特殊鋼株式会社 消耗電極式溶解炉の通電装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US403326A (en) * 1889-05-14 Thomas j
US3677323A (en) * 1968-11-22 1972-07-18 Rheinstahl Huettenwerke Ag Process and apparatus for providing steel ingot
US3952792A (en) * 1974-07-25 1976-04-27 Consarc Corporation Method and apparatus for casting a plurality of ingots
JPS6442531A (en) * 1987-08-07 1989-02-14 Nippon Kokan Kk Arc melting apparatus
US8689856B1 (en) * 2013-03-05 2014-04-08 Rti International Metals, Inc. Method of making long ingots (cutting in furnace)

Also Published As

Publication number Publication date
WO2017016549A1 (de) 2017-02-02
RU2689832C1 (ru) 2019-05-29
EP3328576A1 (de) 2018-06-06
SI3328576T1 (sl) 2019-11-29
JP2018522739A (ja) 2018-08-16
EP3328576B1 (de) 2019-07-17
CN108136493A (zh) 2018-06-08
DE102015117661A1 (de) 2017-02-02

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