EP2440347B1 - Verfahren und vorrichtung zum umschmelzen von metall in einem elektroofen - Google Patents

Verfahren und vorrichtung zum umschmelzen von metall in einem elektroofen Download PDF

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Publication number
EP2440347B1
EP2440347B1 EP10734056.4A EP10734056A EP2440347B1 EP 2440347 B1 EP2440347 B1 EP 2440347B1 EP 10734056 A EP10734056 A EP 10734056A EP 2440347 B1 EP2440347 B1 EP 2440347B1
Authority
EP
European Patent Office
Prior art keywords
heating
crucible
ingot base
ingot
cooling
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.)
Active
Application number
EP10734056.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2440347A1 (de
Inventor
Ulrich Biebricher
Michael Protzmann
Gerhard BRÜCKMANN
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
Priority to SI201031100T priority Critical patent/SI2440347T1/sl
Publication of EP2440347A1 publication Critical patent/EP2440347A1/de
Application granted granted Critical
Publication of EP2440347B1 publication Critical patent/EP2440347B1/de
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Anticipated expiration legal-status Critical

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • B22D27/045—Directionally solidified castings
    • 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 method for remelting metal in an electric furnace, wherein the material electrodes are melted by forming a slag bath and solidifies the molten metal of the material electrodes in a crucible means as a result of cooling in block form, such that a by a progressive solidification of a block foot ago Forms block growth, wherein for influencing the cooling process, a heating of the block foot takes place. Furthermore, the invention relates to a device for heating a block base during the remelting of metal in an electric furnace.
  • the crucible bottom can be heated by crucible means which are used in stationary crucibles.
  • crucible means which are used in stationary crucibles.
  • a heat transfer medium such as water or oil used.
  • the tempering of the block mass in the crucible is therefore indirectly, since first the heat transfer medium must be heated to the desired temperature via a suitable energy source and a heat transfer via the bottom plate of the crucible bottom takes place on the block base.
  • the known type of heating proves to be relatively sluggish, so that in particular hardly desired temperature profiles in the temperature control of the block foot can be achieved.
  • shrinkage of the block foot in the area of the blockfoot surface is also to be noted, so that the block foot is often not in direct contact with the bottom plate in the entire area of its surface.
  • the bottom plate is formed for the purpose of good heat transfer from copper or a copper alloy, so that the temperature of the bottom plate is already limited by material to about 200 ° C. The result is therefore It can be assumed that, on the one hand, only low temperature gradients and, on the other hand, only a relatively small increase in the temperature of the block base are possible by means of conventional block base heating.
  • a device for heating a block foot of a solidified in a crucible by cooling a molten metal of a material electrode block is known.
  • the known device in a crucible bottom on a heating device which is permanently disposed in the crucible bottom and in which the heating of the block foot is indirectly via the heating of a bottom plate of the crucible bottom.
  • the invention is therefore based on the object to propose a method and a device for Blockfußbenningung that allows both an increased temperature gradient and an increase in the maximum possible heating of the block foot.
  • inventive method has the features of claim 1.
  • Advantageous embodiments are the subject of the dependent claims.
  • the invention makes it possible to limit the minimum surface temperature in the area of the block foot or of a negative temperature gradient in order to counteract undesired crack formation in the block surface during cooling.
  • the invention can be equally advantageously used in stationary and sliding block or block exhaust systems, especially when an immediate action on an end face of the block foot takes place.
  • a particularly advantageous variant of the method according to the invention is to pressurize the block base for heating by means of a burner device which uses gas or oil, for example, as an energy carrier.
  • a burner device which uses gas or oil, for example, as an energy carrier.
  • the particular advantage of such a burner device is that, on the one hand, the burner temperature is very accurately adjustable and the other temperature changes the burner temperature in no time by simply controlling the supply of the energy carrier or by a distance control to control the distance of the burner device relative to the block foot quickly feasible are.
  • the block base is subjected to electrical energy
  • a corresponding heating device can be embodied in a very compact manner and thus can also be easily integrated into the crucible bottom if required.
  • an inductively heatable contact plate can be used, which is brought against the end face of the block foot to the plant.
  • a heat transfer flow such that, for example, a heated fluid flow, so for example air or water, is directed directly against the block foot.
  • the heating of the block base takes place in such a way that a defined temperature distribution is established via the block foot cross section, so that, for example, in the outer edge regions of the block foot, which cool more strongly than inner regions of the block foot, a higher or lower temperature is applied as required can.
  • the block base when the block base is acted on by means of a burner device, it may prove advantageous if the heating of the block base takes place in a reducing atmosphere in order to reduce, for example, carburizing, scaling or nitriding of block foot edge regions.
  • an initially closed crucible bottom can be opened to form the recess, in order subsequently to be able to control the cooling by the direct heating of the end face.
  • the device according to the invention has the features of claim 10.
  • Advantageous embodiments are the subject of the dependent claims.
  • the crucible device has a jacket wall and a crucible bottom which is provided with a recess for direct heating by means of a heating device such that the heating energy generated by the heating device is introduced directly into the material of the block foot.
  • the heating device can be designed as a burner device or contact device for introducing current into the block base.
  • the heating device is also possible to design the heating device as a radiator device in order to enable a non-contact entry of heat into the block base.
  • the heating device is designed as convection heating, for example, by a nozzle flow, which directs a heated fluid flow to discretely defined areas of the block foot, for example, a waste heat stream can be used to realize the heating device, elsewhere in the process of Elektroschlackeumschmelzens or independently in the Area of the plant technology of a steelworks becomes available.
  • the heating device is formed independently of the crucible bottom.
  • the effectiveness of the heating device can be further increased by being arranged in a heating chamber adjoining the crucible bottom, which, in particular in the case where the heating chamber is designed as a process chamber, adjusts a defined process atmosphere within the heating chamber, thus for example the setting of a reducing atmosphere, allows.
  • the device according to the invention can be used particularly advantageously in connection with a sliding block installation, in which, due to the partial removal of the block base from the slag bath, a relative stronger and faster cooling of the block foot takes place than with a standard crucible.
  • Fig. 1 shows a crucible device 10, as used in an electric furnace in the electroslag remelting process not shown here, designed as a stationary crucible.
  • the crucible device 10 has, in particular Fig. 3 shows a cup-shaped crucible vessel 11 with a jacket wall 12 and a crucible bottom 13.
  • the jacket wall 12 is double-walled with a vessel inner wall 14 and a vessel outer wall 15, between which a jacket chamber 16 is formed, which serves for receiving a tempering, such as water or oil.
  • the crucible bottom 13 has a bottom plate 17, which is provided in its center with a recess 18. Below the bottom plate 17 and at the in Fig. 3 shown heating configuration in concentric alignment with a central longitudinal axis 19 of the crucible vessel 11 is located a heating device 20 with a arranged on a removable support 21 of a changing device 35 burner head 22 formed as a burner device heating device 20th
  • the heating device 20 is located in the in Fig. 3 illustrated heating configuration within a heating chamber 23, which is formed in the present case as a substructure of the crucible vessel 11.
  • the change carrier 21 is formed as a arranged on a rail assembly 24 chassis and along the rail assembly 24 of a in Fig. 1 shown cooling position in the in Fig. 3 shown heating position in which the burner head 22 is disposed below the recess 18 that, as indicated by the arrows in Fig. 3 indicated a direct admission of an in Fig. 3 merely indicated block foot 26 or an end face 27 of the block foot 26 can be made with fuel gas 25.
  • the heating chamber 23 may be provided with door devices, so that a process atmosphere independent of the environment can be generated within the heating chamber 23.
  • Fig. 2 shows a on the removable carrier 21 of the changing device 35 during the in Fig. 1 illustrated cooling phase in exchange with the heating device 20 in the recess 18 of the bottom plate 17 arranged bottom closure plate 29, which is arranged outside the crucible 10 during the heating phase.
  • the bottom closure plate 29, which is preferably provided with a cooling device for promoting cooling, is inserted into the recess 18 ( FIG. 3) by means of the lifting mechanism 30 arranged on the carrier 21. Fig. 3 ) used.
  • the crucible bottom 13 is provided with a cooling device 31, such that the bottom plate 17 together with a substantially congruent wall plate 32 defines an annular cooling or tempering chamber 33 around the recess 18 around. If necessary, the cooling device 31 allows an even greater concentration of the heat input onto the central region of the block base 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Furnace Details (AREA)
EP10734056.4A 2009-06-12 2010-06-11 Verfahren und vorrichtung zum umschmelzen von metall in einem elektroofen Active EP2440347B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201031100T SI2440347T1 (sl) 2009-06-12 2010-06-11 Postopek in naprava za pretaljevanje kovine v električni peči

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009025176 2009-06-12
PCT/EP2010/058249 WO2010142791A1 (de) 2009-06-12 2010-06-11 Verfahren und vorrichtung zum umschmelzen von metall in einem elektroofen

Publications (2)

Publication Number Publication Date
EP2440347A1 EP2440347A1 (de) 2012-04-18
EP2440347B1 true EP2440347B1 (de) 2015-10-14

Family

ID=42556645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10734056.4A Active EP2440347B1 (de) 2009-06-12 2010-06-11 Verfahren und vorrichtung zum umschmelzen von metall in einem elektroofen

Country Status (7)

Country Link
US (1) US8662142B2 (zh)
EP (1) EP2440347B1 (zh)
JP (1) JP5579261B2 (zh)
KR (1) KR101641348B1 (zh)
CN (1) CN102802841B (zh)
SI (1) SI2440347T1 (zh)
WO (1) WO2010142791A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103600059A (zh) * 2013-12-01 2014-02-26 沈阳工业大学 液淬保温炉
CN111826530B (zh) * 2020-06-22 2022-04-26 北京钢研高纳科技股份有限公司 电渣重熔设备

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2138595C3 (de) * 1971-08-02 1974-05-09 Ernst Reinhardt Gmbh, 7730 Villingen Rotationsgießanlage
US4202401A (en) * 1978-02-22 1980-05-13 Antonov Vladimir I Apparatus for electroslag casting of heavy ingots
JPS6057418B2 (ja) * 1978-11-07 1985-12-14 三菱重工業株式会社 一方向凝固材の製造方法およびその装置
WO1986006415A1 (en) * 1985-04-26 1986-11-06 Vsesojuzny Nauchno-Issledovatelsky, Proektno-Konst Method and device for making hollow blanks by electroslag remelting
JPH02284761A (ja) * 1989-04-21 1990-11-22 George Muri 鋳造システム並びに鋳造装置及びトレー
CN2190551Y (zh) * 1993-10-06 1995-03-01 张基 一种双臂滚塑装置
JPH07188795A (ja) * 1993-11-16 1995-07-25 Daido Steel Co Ltd エレクトロスラグ溶解方法
JPH0929420A (ja) * 1995-07-20 1997-02-04 Kobe Steel Ltd エレクトロスラグ再溶解法による鋼塊の製造方法
WO1998015667A1 (en) * 1996-10-08 1998-04-16 General Electric Company Reduction-melting process to form rare earth-transition metal alloys and the alloys
CN101112791B (zh) * 2006-07-26 2010-05-26 鸿富锦精密工业（深圳）有限公司 热熔接装置

Also Published As

Publication number Publication date
KR101641348B1 (ko) 2016-07-20
WO2010142791A1 (de) 2010-12-16
EP2440347A1 (de) 2012-04-18
CN102802841A (zh) 2012-11-28
US8662142B2 (en) 2014-03-04
JP2012529369A (ja) 2012-11-22
CN102802841B (zh) 2015-05-20
JP5579261B2 (ja) 2014-08-27
US20120132385A1 (en) 2012-05-31
KR20120037405A (ko) 2012-04-19
SI2440347T1 (sl) 2016-02-29

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