US3915217A - Process for electroslag remelting in a funnel shaped crucible - Google Patents

Process for electroslag remelting in a funnel shaped crucible Download PDF

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Publication number
US3915217A
US3915217A US470393A US47039374A US3915217A US 3915217 A US3915217 A US 3915217A US 470393 A US470393 A US 470393A US 47039374 A US47039374 A US 47039374A US 3915217 A US3915217 A US 3915217A
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United States
Prior art keywords
ingot
crucible
slag
relative
growth rate
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Expired - Lifetime
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US470393A
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English (en)
Inventor
Karl Ellebrecht
Karl-Georg Redel
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Balzers und Leybold Deutschland Holding AG
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Leybold Heraeus GmbH
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Application filed by Leybold Heraeus GmbH filed Critical Leybold Heraeus GmbH
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    • 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

  • ABSTRACT A process for the electroslag remelting of electrodes 7 [22] Filed: May 16, 1974 Appl. No.: 470,393
  • the present invention concerns a process for the electroslag remelting of electrodes into ingots, preferably witha relationship of diameters of, electrode/ingot, greater than 1.
  • the method uses a funnel-shaped crucible with a substantially cylindrical extension at the lower end, in which during the formation of the ingot, acontinuous relative motion is maintained between ingot and crucible.
  • the principle of constant melted pool surface inside the crucible has previously also been applied in practice to block casting with relative motion between the crucible and the block.
  • a variation of the process is also known, in which a periodic relativemotion between crucible and block is carried out.
  • the locations of the upper and lower points of reversal of the part that is moving with respect to the crucible are constant.
  • the constant position of the surface of the melted pool has previously been accepted also for melting in funnel-shaped crucibles.
  • Another object of the present invention is to avoid reworking of the block to remove any metal scrap
  • a block is produced with a smooth surface, free from providing that the relative speed between ing'ot and slag inclusions, slag additions, and metal spills.
  • the fundamentally inevitable tearing of the slag occurs at such small intervals and in such small lengths that one can speak of a quasicontinuous process.
  • the control of the relative speed between ingot and crucible, and particularly the, descending speed of the melted pool in relation to the crucible during the process of formation of the block can be achieved in the simplest manner indirectly, by providing that the position of the slag pool surface in the crucible is continuously sensed. The relative speed between crucible and ingot is so adjusted, that the slag pool surface continuously descends slightly.
  • visual control of the slag pool surface in the crucible and manual adjustment of the descending speed of the block or speed of the crucible can be employed with known measuring instruments. This can be done, for example, by continuous measurement of the position of the metal pool surface in the crucible and corresponding regulating facilities.
  • the position of the metal pool surface can be determined by sensing the temperature profile in the crucible by a probe dipped into the slag, by ultrasonics and the like.
  • a vertical guide column 10 is attached by means of a base plate 11 to a pedestal 12.
  • a guide shell 13 is movable in vertical direction along guide column 10, and can also rotate horizontally.
  • An electrode-carrying arm 14 is attached to the guide shell. The' free end of the electrode-carrying arm carries a mounting head 15, holding the stub 16 of a meltable electrode 17 in such a way, that, in addition to the mechanical holding action, a reliable electrical current connection is established. Movement of guide shell 13 is accomplished by a regulated drive, not shown in thedrawing.
  • Guide shell 18' On guide column there is also another guide shell 18, similarly movable vertically and rotatable horizontally.
  • Guide shell 18' carries crucible-carrying arm 19, at the end of which there is a crucible 20, made in the form of a funnel.
  • Crucible 20 consists of an upper cylindrical part 21 and a narrower lower cylindrical part 22, between which there is a conical transitional part 23.
  • Parts 21 23 constitute a unit, which encloses a common hollowspace, through which flows a cooling liquid.
  • the facility is shown at a stage, at which a portion of the meltable electrode 17 has already been'melted into an ingot 24 being built up.
  • the ingot 24 rests on a raisable and lowerable platform 25, connected by column 26 to a drive, not shown.
  • the moving velocities of the guide'shell 13, the guide shell 18, and the column 26 are so adjusted relative to one another as to preserve the relative orientation of the parts shown in the drawfixed in place and to raise crucible 20 in the manner taught by the invention.
  • meltable electrode 17 to form a'current path.
  • meltable electrode 17 to form a'current path.
  • a melted pool 28 out of which ingot 24'is forrr ied byprogress'ive'crystallization.
  • the upper surface of melted pool 28 is in the position designatedhj Because of the relative motion according to the invention, the
  • the crucible 20 was fixed 'in place, and was closed at the beginning of. the-remelting process by the platform 25. 30 kilograms of powdered slag in the combination of 40% ing. It is of course possible to construct the platform r Cal-" 30% CaO, and 30% A1 05 were introduced into the crucible. At the start, the slag granules came up to approximately the height, of the surface of the melted pool designated as h,.
  • the meltable electrode 17 at first had a thin cylindrical stub on its lower face, reaching down to platform 25, by means of which the slag was melted.
  • the upper sur face of the slag layer 27 was approximately at the height shown in the drawing.
  • the meltableelectrode 17 which consisted of structural steel St. 52-3 and had a diameter of 300 mm.
  • the remelting process was'carried' out with a melting current of 6000 amps. with an average melting voltage of age of volts, resulting in a melting rate of 200 kilograms/hr.
  • a partial length of 150 mm was melted off the meltable electrode 17 d'uringa melting time of 25 minutes. Based on the melting rate and the given cross-section of the lower cylindrical, part 22 a of crucible 2 0, a descending speed of the platform 25 of 24 mm/min.
  • a process for the electroslag remelting of electrodes into ingots comprising the steps of: moving continuously a funnel-shaped crucible with a substantially cylindrical extension at the lower end thereof relative to the ingot during the formation'of the ingot,'the relative motion between said crucible and said ingot eX-,
  • the slag temperature at the top of the crucible being substantially higher than the temperature near the molten pool, the slag being a substantially viscous liquid forming a thick layer of slag on the walls of said crucible and on the surface of the ingot, the continuous motion of said crucible relative to said ingot providing a substantially smooth surface of the ingot.”

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Continuous Casting (AREA)
US470393A 1973-06-06 1974-05-16 Process for electroslag remelting in a funnel shaped crucible Expired - Lifetime US3915217A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2328804A DE2328804C2 (de) 1973-06-06 1973-06-06 Verfahren zum Elektroschlacke-Umschmelzen In einer trichterförmigen Kokille

Publications (1)

Publication Number Publication Date
US3915217A true US3915217A (en) 1975-10-28

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ID=5883209

Family Applications (1)

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US470393A Expired - Lifetime US3915217A (en) 1973-06-06 1974-05-16 Process for electroslag remelting in a funnel shaped crucible

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US (1) US3915217A (enrdf_load_stackoverflow)
JP (1) JPS5337802B2 (enrdf_load_stackoverflow)
DE (1) DE2328804C2 (enrdf_load_stackoverflow)
FR (1) FR2234371B1 (enrdf_load_stackoverflow)
GB (1) GB1432081A (enrdf_load_stackoverflow)
IT (1) IT1010227B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061180A (en) * 1976-06-23 1977-12-06 Paton Boris E Installation for electroslag melting of heavy-weight metal ingots
US4612649A (en) * 1983-11-10 1986-09-16 Cabot Corporation Process for refining metal
US5799721A (en) * 1996-01-29 1998-09-01 Inteco Internationale Technische Beratung Ges.M.B.H Method of remelting metals to form an elongate portion and apparatus therefor
US6687284B1 (en) * 1999-11-16 2004-02-03 Centre d'Innovation sur le Transport d'Energie du Québec Method and apparatus to facilitate restriking in an arc-furnace
CN104325118A (zh) * 2014-10-29 2015-02-04 湖南力方冶金设备研究院（有限合伙） 一种合金钢铁屑的无烧损熔炼工艺及其装置
CN105316488A (zh) * 2015-12-02 2016-02-10 安徽工业大学 一种高速、低夹杂物的电渣重熔装置及其重熔方法
CN106091684A (zh) * 2016-06-08 2016-11-09 天津钢研海德科技有限公司 一种组合式智能电渣系统
CN111118302A (zh) * 2019-12-31 2020-05-08 浙江正达模具有限公司 金属电渣重熔用结晶器和电渣重熔装置以及电渣重熔方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5045230U (enrdf_load_stackoverflow) * 1973-08-27 1975-05-07
DE19728098A1 (de) * 1997-07-02 1999-01-07 Inteco Int Techn Beratung Trichterkokille mit trichterförmigem Einsatzrohr für das Elektroschlackeumschmelzen sowie Verfahren dazu
AT410412B (de) † 2000-11-10 2003-04-25 Inteco Int Techn Beratung Verfahren zum elektroschlacke umschmelzen von metallen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2367123A (en) * 1943-05-08 1945-01-09 Kellogg M W Co Apparatus for producing metal bodies
US3677323A (en) * 1968-11-22 1972-07-18 Rheinstahl Huettenwerke Ag Process and apparatus for providing steel ingot
US3713476A (en) * 1969-05-08 1973-01-30 B Paton Installation for making ingots and method therefor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2367123A (en) * 1943-05-08 1945-01-09 Kellogg M W Co Apparatus for producing metal bodies
US3677323A (en) * 1968-11-22 1972-07-18 Rheinstahl Huettenwerke Ag Process and apparatus for providing steel ingot
US3713476A (en) * 1969-05-08 1973-01-30 B Paton Installation for making ingots and method therefor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4061180A (en) * 1976-06-23 1977-12-06 Paton Boris E Installation for electroslag melting of heavy-weight metal ingots
US4612649A (en) * 1983-11-10 1986-09-16 Cabot Corporation Process for refining metal
US5799721A (en) * 1996-01-29 1998-09-01 Inteco Internationale Technische Beratung Ges.M.B.H Method of remelting metals to form an elongate portion and apparatus therefor
US6687284B1 (en) * 1999-11-16 2004-02-03 Centre d'Innovation sur le Transport d'Energie du Québec Method and apparatus to facilitate restriking in an arc-furnace
CN104325118A (zh) * 2014-10-29 2015-02-04 湖南力方冶金设备研究院（有限合伙） 一种合金钢铁屑的无烧损熔炼工艺及其装置
CN105316488A (zh) * 2015-12-02 2016-02-10 安徽工业大学 一种高速、低夹杂物的电渣重熔装置及其重熔方法
CN106091684A (zh) * 2016-06-08 2016-11-09 天津钢研海德科技有限公司 一种组合式智能电渣系统
CN106091684B (zh) * 2016-06-08 2018-03-27 天津钢研海德科技有限公司 一种组合式智能电渣系统
CN111118302A (zh) * 2019-12-31 2020-05-08 浙江正达模具有限公司 金属电渣重熔用结晶器和电渣重熔装置以及电渣重熔方法

Also Published As

Publication number Publication date
IT1010227B (it) 1977-01-10
DE2328804B1 (de) 1974-11-28
JPS5337802B2 (enrdf_load_stackoverflow) 1978-10-12
FR2234371A1 (enrdf_load_stackoverflow) 1975-01-17
GB1432081A (en) 1976-04-14
FR2234371B1 (enrdf_load_stackoverflow) 1979-04-06
JPS5021933A (enrdf_load_stackoverflow) 1975-03-08
DE2328804C2 (de) 1975-07-17

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