EP1925681B1 - Procédé de refonte de métaux sous laitier électroconducteur et lingotière à cet effet - Google Patents
Procédé de refonte de métaux sous laitier électroconducteur et lingotière à cet effet Download PDFInfo
- Publication number
- EP1925681B1 EP1925681B1 EP07021759A EP07021759A EP1925681B1 EP 1925681 B1 EP1925681 B1 EP 1925681B1 EP 07021759 A EP07021759 A EP 07021759A EP 07021759 A EP07021759 A EP 07021759A EP 1925681 B1 EP1925681 B1 EP 1925681B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ingot mould
- cooled
- water
- remelting
- block
- 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.)
- Not-in-force
Links
- 239000002893 slag Substances 0.000 title claims description 36
- 229910052751 metal Inorganic materials 0.000 title claims description 31
- 239000002184 metal Substances 0.000 title claims description 31
- 238000000034 method Methods 0.000 title claims description 15
- 150000002739 metals Chemical class 0.000 title claims description 4
- 238000002844 melting Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 229910002804 graphite Inorganic materials 0.000 claims description 4
- 239000010439 graphite Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- 239000011449 brick Substances 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 239000011214 refractory ceramic Substances 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000010937 tungsten Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 3
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 claims 1
- 230000010355 oscillation Effects 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 210000002268 wool Anatomy 0.000 claims 1
- 238000007711 solidification Methods 0.000 description 7
- 230000008023 solidification Effects 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910001338 liquidmetal Inorganic materials 0.000 description 3
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
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
Definitions
- the invention relates to a process for the electroslag remelting of metals, in particular iron and nickel-based alloys for the production of Umschmelzblöcken from one or more Abschmelzelektroden in a short, water-cooled Gleitkokille according to the preamble of patent claim 1, as these from the WO02 / 40726 A1 as well as the AT 406239 B are known.
- the invention comprises an improved mold compared to the prior art for carrying out this method according to claim 6.
- the length of the mold corresponds to the length of the block to be produced.
- the mold is successively filled with remelted metal by melting the consumable electrode in the slag bath floating on the metal mirror, whereby there is no relative movement between the mold or the mold wall and the remelt block.
- Umschmelzblöcke be produced whose length exceeds the length of the mold by a multiple.
- the short, water-cooled mold serves as a melting and casting mold, in which the hot slag bath is located and in which the metal melting off from the electrode is collected and subsequently solidified into the remelting block.
- the mold is therefore required to carry out the remelting process only in the area of the slag bath and in the area of block solidification. Once the remelt block has solidified, the mold no longer fulfills any purpose.
- the consumption of electric melting energy in electroslag remelting is relatively high in comparison with other melting processes which also operate with electrical energy, such as scrap melting in an electric arc furnace or an induction crucible furnace, since the melting rate is controlled primarily during electroslag remelting. to ensure a perfect solidification structure of the remelting blocks.
- An energy saving by increasing the Abschmelzrate is therefore not possible, the direct contact of serving as a heat source, through the passage of current highly heated slag bath with the water-cooled mold wall still has a significant additional negative impact.
- the object of the present invention is to use, on the one hand, the economic advantage of thermal insulation in the area of the slag bath in the case of electroslag remelting, while avoiding the problems described above, so that a technical application is possible in a meaningful manner.
- the solution of this problem using a known short, two-part Gleitkokille whose lower, the casting cross-section forming part in the usual manner water cooled and the upper part against heat dissipation is completely or partially isolated, achieved in that except in the start-up phase during the regular block structure of the metal mirror by a corresponding control of the relative movement between the mold and remelt always in the lower, water-cooled part of the mold - that is below the dividing line between water-cooled and insulated part of the same - held that the distance between the surface of the metal mirror on the one hand and the through the dividing line 5 mm, but not more than 100 mm, and that the slag bath floating on the metal mirror is at least 75% of its height in the region of the insulated part.
- the relative movement can be either stepwise or continuously in a conventional manner; in the case of a step-by-step movement, the movement step followed by a break should correspond at least to twice the block-building speed.
- a step in the opposite direction whose step length amounts to a maximum of 30% of the length of the original movement step, can be connected to each such movement step.
- a possible continuous withdrawal movement can also be superimposed on an oscillating movement.
- a lower base part of a sliding mold as a multi-part mold unit 10 represents a water-cooled solidification or casting mold 12, the inner wall preferably consists of an insert 14 made of copper; this is installed in a water jacket or water tank not separately shown in the drawing.
- the insert 14 metal dripping off in the mold longitudinal axis A is collected in a metal sump 4 and solidified into a remelt block 6.
- the metal mirror 5 of the metal sump 4 is superimposed by a slag bath 8.
- the remelting block 6 is withdrawn from the casting mold 12 by a lowerable base plate 16, which is only indicated here, in such a way that the metal mirror 5 always remains below an upper, water-cooled flange surface 18 of the casting mold 12; above which there is an upper mold part 20, which is constructed in several parts and a water-cooled support structure 22 in the form of a tubular ring rectangular cross section and a likewise annular insert 24 includes.
- a refractory metal - such as tungsten or molybdenum - existing inner layer 26 is in contact with the slag bath 8 of height h.
- the inner layer 26 rectangular radial section has an inner diameter which corresponds approximately to the inner diameter d of the mold 12.
- an intermediate layer 28 is also arranged rectangular radial section, which takes over the function of thermal insulation.
- This intermediate layer 28 is preferably made of a heat-resistant, refractory, ceramic material resistant to thermal shock, for example, a high-temperature resistant ceramic fiber mat, refractory bricks or other ceramic high-temperature resistant material such as ramming masses or granules.
- the support structure 22 of the upper, heat-insulating Kokillenteils 20 may also be formed as an extension of the water jacket of the lower mold part 12, in which then the inner layer 26 and the intermediate layer 28 are installed.
- the upper die part consisting of the support structure 22, the inner layer 26 and the intermediate layer 28 can be held down by a rectangular radial section which is also water-cooled cover ring 30 here in the form of a tubular ring, for which purpose the cover ring 30 does not pass through here shown elements with the water jacket of the lower, water-cooled mold part 12 can be clamped together.
- a block deduction from the mold 12 of the remelting block 6 can be constructed on a fixed base plate.
- the mold unit 10 can - as shown here - standing in contact with the slag 8 insert 24 of the upper Kokillenteils 20 via a corresponding high-current line 32 with a return line 34 of the melt stream to the melt power supply 35 connected, so that the Insert 24 at the same potential as the bottom plate 16 is located.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Furnace Details (AREA)
Claims (11)
- Procédé de refonte sous laitier électroconducteur de métaux, notamment d'alliages à base de fer et de nickel, pour fabriquer des blocs de deuxième fusion (6) à partir d'au moins une électrode fusible (2) dans une lingotière lisse (10) courte en deux parties dont la partie inférieure de lingotière (12), formant la section transversale de coulée, est refroidie à l'eau et dont la partie supérieure de lingotière (20) est entièrement ou partiellement isolée contre la dissipation de la chaleur,
caractérisé en ce
qu'en dehors de la phase de démarrage, pendant la construction normale du bloc, la surface apparente du métal (5) est maintenue dans la partie inférieure (12) refroidie à l'eau de la lingotière, c'est-à-dire au-dessous de la ligne de séparation (18) entre la partie refroidie à l'eau et la partie isolée de celle-ci, par une commande du mouvement relatif entre la lingotière (10) et le bloc de deuxième fusion (6) de telle sorte que l'écart entre la surface apparente du métal (5) d'un côté et le plan formé par la ligne de séparation (18) entre la partie refroidie et la partie isolée d'un autre côté soit au moins égal à 5 mm, mais au maximum à 100 mm, et qu'au moins 75 % de la hauteur (h) du bain de scories (8) qui flotte sur la surface apparente du métal (5) se trouve dans la zone de la partie isolée. - Procédé selon la revendication 1, caractérisé en ce que le mouvement relatif entre la lingotière (10) et le bloc de deuxième fusion (6) est accompli pas à pas, la vitesse du mouvement correspondant au moins au double de la vitesse de construction du bloc.
- Procédé selon la revendication 1, caractérisé en ce que le mouvement relatif entre la lingotière (10) et le bloc de deuxième fusion (6) se déroule de manière continue.
- Procédé selon la revendication 1 ou 2, caractérisé en ce que, lors d'un déplacement pas à pas, chaque pas de mouvement relatif est suivi par un pas dans la direction opposée dont l'excursion est égale au maximum à 30 % de celle du pas originel.
- Procédé selon les revendications 1 et 3, caractérisé en ce qu'une oscillation est superposée au mouvement relatif continu entre la lingotière (10) et le bloc de deuxième fusion (6).
- Lingotière pour la refonte sous laitier électroconducteur, laquelle est refroidie à l'eau en étant séparée en au moins deux parties dans l'axe longitudinal, sa partie inférieure (12), formant la section transversale de coulée, étant refroidie à l'eau et sa partie supérieure (20), rattachée à celle-ci, étant isolée contre la dissipation de la chaleur, pour la mise en oeuvre du procédé selon au moins l'une des revendications 1 à 5,
caractérisée en ce
que la partie (20) isolée contre la dissipation de la chaleur est constituée de plusieurs couches, une couche intermédiaire (28) d'isolation thermique étant disposée entre une construction d'appui (22) refroidie à l'eau qui représente la couche extérieure et une couche (26) résistante aux températures élevées qui est en contact avec le bain de scories, laquelle se compose d'un matériau céramique ignifuge résistant aux changements de température, de préférence de pierres isolantes, de nattes en fibres, de laine de roche, de grenailles, de matériau à grains fins ou similaires, et en ce que la surface apparente du métal (5) est toujours maintenue au-dessous de la ligne de séparation (18) dans la zone refroidie à l'eau par une plaque de fond abaissable (16) ou par une unité de lingotière (10) relevable, sauf pendant la phase de démarrage. - Lingotière selon la revendication 6, caractérisée en ce que la construction d'appui (22) refroidie à l'eau de la partie supérieure de lingotière (20) représente une partie d'un caisson d'eau de la partie inférieure de lingotière (12) et est ainsi reliée à celle-ci.
- Lingotière selon la revendication 6, caractérisée en ce que la partie supérieure de lingotière (20) constituée de plusieurs couches et isolée contre la dissipation de la chaleur est montée entre un anneau de recouvrement (30) refroidi à l'eau qui se trouve au-dessus de celle-ci et la partie inférieure de lingotière (12) refroidie à l'eau.
- Lingotière selon l'une des revendications 6 à 8, caractérisée en ce que la couche (26) de la partie supérieure de lingotière (20) qui est en contact avec le bain de scories (12) se compose de graphite ou d'un métal à température de fusion élevée, de préférence de tungstène ou de molybdène.
- Lingotière selon la revendication 9, caractérisée en ce qu'un contact avec une source de courant (35) peut être établi à travers une ligne à courant fort (32) par le biais de la couche (26) de la partie supérieure de lingotière (20) composée de graphite ou d'un métal à température de fusion élevée.
- Lingotière selon la revendication 9, caractérisée en ce que la couche (26) de la partie supérieure de lingotière (20) composée de graphite ou d'un métal à température de fusion élevée est isolée électriquement par rapport à la partie inférieure (12) de la lingotière (10) refroidie à l'eau qui forme le bloc de deuxième fusion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT18842006A AT504574B1 (de) | 2006-11-15 | 2006-11-15 | Verfahren zum elektroschlacke umschmelzen von metallen |
| DE200610062460 DE102006062460A1 (de) | 2006-11-15 | 2006-12-28 | Verfahren zum Elektroschlacke-Umschmelzen von Metallen sowie Kokille dafür |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1925681A2 EP1925681A2 (fr) | 2008-05-28 |
| EP1925681A3 EP1925681A3 (fr) | 2009-03-11 |
| EP1925681B1 true EP1925681B1 (fr) | 2011-04-27 |
Family
ID=39060225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07021759A Not-in-force EP1925681B1 (fr) | 2006-11-15 | 2007-11-09 | Procédé de refonte de métaux sous laitier électroconducteur et lingotière à cet effet |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US7849912B2 (fr) |
| EP (1) | EP1925681B1 (fr) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT509736B1 (de) * | 2010-05-14 | 2012-03-15 | Inteco Special Melting Technologies Gmbh | Verfahren und vorrichtung zur kontinuierlichen erfassung des schlackenniveaus in esu-anlagen mit kurzen gleitkokillen |
| JP5669509B2 (ja) * | 2010-07-16 | 2015-02-12 | 高橋 謙三 | 攪拌装置付き連続鋳造用鋳型装置 |
| AT512471B1 (de) * | 2012-02-07 | 2014-02-15 | Inteco Special Melting Technologies Gmbh | Umschmelzanlage für selbstverzehrende elektroden |
| CN104330411B (zh) * | 2014-11-10 | 2017-05-10 | 东北大学 | 一种动态观测模拟电渣重熔过程熔滴行为的装置及方法 |
| CN112792323B (zh) * | 2020-12-21 | 2022-06-28 | 河钢股份有限公司 | 一种镍基材料的电渣重熔补缩工艺 |
| WO2023142422A1 (fr) * | 2022-01-28 | 2023-08-03 | 苏州大学 | Dispositif de refusion sous laitier électroconducteur d'un cristalliseur refroidi à l'eau du type à entrée unique et à sorties multiples et procédé de refusion sous laitier électroconducteur |
| CN120619308B (zh) * | 2025-08-12 | 2025-10-28 | 太原科技大学 | 一种逐层凝固制备大型铸锭的装置及方法 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT287215B (de) | 1968-01-09 | 1971-01-11 | Boehler & Co Ag Geb | Verfahren und Vorrichtung zum Elektroschlackenumschmelzen von Metallen, insbesondere von Stählen |
| AT297959B (de) | 1968-06-28 | 1972-04-25 | Boehler & Co Ag Geb | Verfahren zum Elektroschlackeumschmelzen von Metallen und Legierungen |
| SU520785A1 (ru) | 1974-11-28 | 1977-10-25 | Ордена Ленина И Ордена Трудового Красного Знамени Институт Электросварки Им. Е.О.Патона | Печь электрошлакового переплава |
| AT406239B (de) | 1996-04-09 | 2000-03-27 | Inteco Int Techn Beratung | Wassergekühlte kokille für das stranggiessen oder elektroschlacke-umschmelzen |
| DE19614182C1 (de) | 1996-04-11 | 1997-07-31 | Inteco Int Techn Beratung | Wassergekühlte Kokille zum Herstellen von Blöcken oder Strängen sowie deren Verwendung |
| AT409233B (de) * | 2000-02-07 | 2002-06-25 | Inteco Int Techn Beratung | Verfahren und anordnung zum herstellen von gusskörpern aus metallen |
| AT410412B (de) * | 2000-11-10 | 2003-04-25 | Inteco Int Techn Beratung | Verfahren zum elektroschlacke umschmelzen von metallen |
| AT410413B (de) * | 2000-11-14 | 2003-04-25 | Inteco Int Techn Beratung | Verfahren zum elektroschlacke umschmelzen von metallen |
-
2007
- 2007-11-09 EP EP07021759A patent/EP1925681B1/fr not_active Not-in-force
- 2007-11-14 US US11/939,569 patent/US7849912B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP1925681A2 (fr) | 2008-05-28 |
| US20080115909A1 (en) | 2008-05-22 |
| US7849912B2 (en) | 2010-12-14 |
| EP1925681A3 (fr) | 2009-03-11 |
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