EP0166868A2 - Dispositif et procédé pour le traitement ultérieur d'acier préfondu - Google Patents
Dispositif et procédé pour le traitement ultérieur d'acier préfondu Download PDFInfo
- Publication number
- EP0166868A2 EP0166868A2 EP85103726A EP85103726A EP0166868A2 EP 0166868 A2 EP0166868 A2 EP 0166868A2 EP 85103726 A EP85103726 A EP 85103726A EP 85103726 A EP85103726 A EP 85103726A EP 0166868 A2 EP0166868 A2 EP 0166868A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrodes
- steel
- melt
- carbon
- lid
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 23
- 239000010959 steel Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title abstract description 5
- 238000009434 installation Methods 0.000 title 1
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- 239000000155 melt Substances 0.000 claims abstract description 11
- 238000009749 continuous casting Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 150000002739 metals Chemical class 0.000 claims abstract description 4
- 230000000149 penetrating effect Effects 0.000 claims abstract 2
- 230000008018 melting Effects 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims 1
- 239000000161 steel melt Substances 0.000 abstract description 4
- 229910001208 Crucible steel Inorganic materials 0.000 abstract description 2
- 238000010891 electric arc Methods 0.000 description 4
- 101150006573 PAN1 gene Proteins 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910002065 alloy metal Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009843 secondary steelmaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification 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
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
Definitions
- the invention relates to a device for the metallurgical aftertreatment of premelted metals according to the preamble of the main claim and to a method according to the preamble of claim 6.
- a lid over the pan similar to that of an electric arc furnace.
- the molten steel can be heated via the resulting electric arc via one or more electrodes (usually operated with alternating current) which are suspended on support arms and guided through the cover in electrode guides.
- the electric arc heating can take place both under atmospheric pressure - a sealing of the pan against the lid is not necessary - and under vacuum, the pan being sealed in a vacuum-tight manner from the atmosphere and the electrodes being led through the lid via vacuum seals.
- Round graphite electrodes are used as electrodes according to the prior art, which can be loaded with high currents and generate an easily controllable arc. Depending on the pan size and the desired heating output, they have a diameter of 300 to 500 mm.
- the electrodes are consumed by oxidation with the atmosphere during operation.
- the electrode consumption is approx. 0.5 kg / t of treated steel. This corresponds to a price of approx. 6 DM / kg electrode Costs of approx. DM 150,000 with a monthly post-treatment of approx. 50,000 tons of steel.
- the present invention therefore proposes to provide a device for metallurgical aftertreatment of the type mentioned at the beginning with electrodes made of metal strands.
- the electrodes advantageously consist of billets cast in the strand, which have a composition corresponding to the analysis of the molten metal intended for aftertreatment.
- the casting structure of these continuous casting billets - in particular of steel billets with a dendritic solidification structure in the core - permits high current loads on such a metal electrode with a high current density, but without the electrodes melting quickly.
- Remnants of continuous casting billets or remnants of continuous casting round are preferably used as metal electrodes. If these remaining pieces are not of sufficient length for clamping as an electrode, they can easily be welded together to form a longer piece before being used as an electrode.
- the invention is particularly suitable for the production of low-carbon steels or for the production of steel grades with a narrowly defined carbon content.
- the inventive method according to claim 6 is advantageously carried out with electrodes made of continuously cast steel billets.
- Fig. 1 a pan aftertreatment system is shown schematically.
- the pan 1 consists of a cylindrical pan 1, which contains liquid metal 2.
- the molten metal is stirred over a bottom blowing stone 3.
- the pan 1 is closed with a lid 4 through which three electrodes 51, 52 and 53 are passed. The electrode tips reach close to the surface of the molten metal and heat the molten metal there via the electric arc.
- the electrodes consist of metal strands, preferably of continuous casting billets or continuous casting base material, which have a composition corresponding to the analysis of the molten metal.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3424510 | 1984-07-04 | ||
DE19843424510 DE3424510A1 (de) | 1984-07-04 | 1984-07-04 | Vorrichtung und verfahren zur metallurgischen nachbehandlung von vorgeschmolzenen metallen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0166868A2 true EP0166868A2 (fr) | 1986-01-08 |
EP0166868A3 EP0166868A3 (en) | 1986-10-08 |
EP0166868B1 EP0166868B1 (fr) | 1988-03-02 |
Family
ID=6239757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85103726A Expired EP0166868B1 (fr) | 1984-07-04 | 1985-03-28 | Dispositif et procédé pour le traitement ultérieur d'acier préfondu |
Country Status (4)
Country | Link |
---|---|
US (1) | US4604135A (fr) |
EP (1) | EP0166868B1 (fr) |
JP (1) | JPS6119722A (fr) |
DE (2) | DE3424510A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6751986B2 (en) | 2000-12-22 | 2004-06-22 | The Bog Group, Inc. | Structured packing |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3612174A1 (de) * | 1986-04-11 | 1987-10-15 | Krupp Stahl Ag | Verfahren und vorrichtung zum verlaengern von aus stahl bestehenden heizelektroden einer nachbehandlungsanlage fuer fluessigen stahl |
JP7139876B2 (ja) * | 2018-10-25 | 2022-09-21 | 日本製鉄株式会社 | 溶鋼の取鍋精錬方法 |
JP7139878B2 (ja) * | 2018-10-26 | 2022-09-21 | 日本製鉄株式会社 | 溶鋼の取鍋精錬方法 |
JP7139877B2 (ja) * | 2018-10-26 | 2022-09-21 | 日本製鉄株式会社 | 溶鋼の取鍋精錬方法 |
DE102020005129B4 (de) | 2020-08-21 | 2024-05-16 | Technische Universität Bergakademie Freiberg, Körperschaft des öffentlichen Rechts | Kohlenstoffärmere und kohlenstofffreie Elektroden für den Einsatz in der Stahlmetallurgie |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4090054A (en) * | 1976-10-12 | 1978-05-16 | Brown Boveri Corporation | Electrical preheating apparatus |
JPS5611133A (en) * | 1979-07-11 | 1981-02-04 | Kawasaki Steel Corp | Arc-type heating apparatus for molten steel contained in ladle |
DE3232551A1 (de) * | 1981-12-01 | 1983-06-09 | Iso "Metalurgkomplekt", Sofija | Verfahren und vorrichtung zur behandlung und raffinierung von fluessigen metallegierungen mittels gleichstrom-lichtbogenerhitzung |
EP0094334A1 (fr) * | 1982-05-07 | 1983-11-16 | Paul Metz | Dispositif pour le traitement métallurgique de métaux liquides |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT295060B (de) * | 1969-07-21 | 1971-12-27 | Boehler & Co Ag Geb | Vorrichtung zum Elektroschlackenumschmelzen von Metallen, insbesondere von Stählen |
US3826646A (en) * | 1969-10-13 | 1974-07-30 | G Karlsson | Method for treating melts and means for carrying out this treatment |
-
1984
- 1984-07-04 DE DE19843424510 patent/DE3424510A1/de not_active Withdrawn
-
1985
- 1985-03-28 EP EP85103726A patent/EP0166868B1/fr not_active Expired
- 1985-03-28 DE DE8585103726T patent/DE3561690D1/de not_active Expired
- 1985-05-29 US US06/738,918 patent/US4604135A/en not_active Expired - Fee Related
- 1985-06-14 JP JP60128385A patent/JPS6119722A/ja active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4090054A (en) * | 1976-10-12 | 1978-05-16 | Brown Boveri Corporation | Electrical preheating apparatus |
JPS5611133A (en) * | 1979-07-11 | 1981-02-04 | Kawasaki Steel Corp | Arc-type heating apparatus for molten steel contained in ladle |
DE3232551A1 (de) * | 1981-12-01 | 1983-06-09 | Iso "Metalurgkomplekt", Sofija | Verfahren und vorrichtung zur behandlung und raffinierung von fluessigen metallegierungen mittels gleichstrom-lichtbogenerhitzung |
EP0094334A1 (fr) * | 1982-05-07 | 1983-11-16 | Paul Metz | Dispositif pour le traitement métallurgique de métaux liquides |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN, Band 5, Nr. 57 (M-64)[729], 18. April 1981; & JP - A - 56 111133 (KAWASAKI SEITETSU) 04.02.1981 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6751986B2 (en) | 2000-12-22 | 2004-06-22 | The Bog Group, Inc. | Structured packing |
Also Published As
Publication number | Publication date |
---|---|
DE3561690D1 (en) | 1988-04-07 |
US4604135A (en) | 1986-08-05 |
DE3424510A1 (de) | 1986-01-09 |
EP0166868A3 (en) | 1986-10-08 |
JPS6119722A (ja) | 1986-01-28 |
JPH0142322B2 (fr) | 1989-09-12 |
EP0166868B1 (fr) | 1988-03-02 |
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