EP0954615B1 - Procede et installation pour le traitement de l'acier en poche - Google Patents
Procede et installation pour le traitement de l'acier en poche Download PDFInfo
- Publication number
- EP0954615B1 EP0954615B1 EP98901944A EP98901944A EP0954615B1 EP 0954615 B1 EP0954615 B1 EP 0954615B1 EP 98901944 A EP98901944 A EP 98901944A EP 98901944 A EP98901944 A EP 98901944A EP 0954615 B1 EP0954615 B1 EP 0954615B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bell
- steel
- installation
- treatment
- liquid metal
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000011282 treatment Methods 0.000 title claims abstract description 14
- 238000009434 installation Methods 0.000 title claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 title description 16
- 239000010959 steel Substances 0.000 title description 16
- 239000002184 metal Substances 0.000 claims description 7
- 229910001338 liquidmetal Inorganic materials 0.000 abstract description 19
- 239000007788 liquid Substances 0.000 description 11
- 230000005587 bubbling Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000009850 CAS-OB (composition adjustment by sealed argon bubbling with oxygen blowing) Methods 0.000 description 1
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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
- C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/0025—Charging or loading melting furnaces with material in the solid state
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/16—Introducing a fluid jet or current into the charge
-
- 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 present invention relates to a method and an installation for the treatment of liquid metal, in particular of ladle steel.
- the liquid metal contained in the bag is subjected to different treatments in a confined area, delimited by the bell immersed in liquid metal. Below the bell, a gas is injected bubbling through the liquid metal to homogenize it during the treatment. It is therefore forms turbulences on the surface of the liquid metal which lead to increased local wear of the bell on its lower edge.
- the object of the present invention is to provide a method and a device to minimize local wear of the bell during liquid metal treatment in the bag.
- This object is achieved by a process aimed at minimizing the local wear of a bell during treatment of a liquid metal in a bag, characterized in that we rotate the bell around an axis during the metal processing liquid.
- the speed of rotation of the bell is between 0.5 and 2 revolutions / min during the treatment of the liquid metal.
- the speed of rotation of the bell can be adapted according to the diameter of the bell, depending on the treatment applied to the liquid metal and / or depending on the composition and viscosity of the slag which covers the liquid metal in the pocket.
- the pocket can continue to rotate around its axis even when it is removed from the bath after the treatment of liquid metal.
- the bell revolves around a vertical axis, substantially perpendicular to the surface of the liquid metal liquid steel respectively.
- an installation for implementing the method comprising a device drive allowing to drive the bell in a movement of rotation during the processing of the liquid metal.
- a pocket 10 comprising a refractory lining 15 is filled of liquid steel 20 and is placed below a refractory bell 30.
- the bell 30 In the working position, during the processing of the liquid metal, the bell 30 is lowered until its lower edge 40 plunges into the liquid steel 20 ( Figure 2).
- the bell 30 is connected to a supply conduit 50 through which the combustible materials and alloying elements are introduced into the steel liquid 20. It comprises a drive device 60 which can cause the bell in a rotational movement around. of a vertical axis.
- An inert or reducing bubbling gas can be introduced into the steel liquid 20 either by a porous plug (not shown) arranged in the bottom of the pocket 10 either by a lance (not shown) which is introduced into the pocket 10.
- This bubbling gas is used to homogenize the liquid steel 20 contained in the pocket 10 during the processing of the steel 20.
- This bubbling gas creates turbulence on the surface of the steel 20 which causes local wear of the bell 30 and in particular of the lower edge 40 of the bell 30.
- Figure 3 shows an enlarged view of the drive device 60 of the bell 30.
- the upper end of the bell 30 comprises a ball bearing 70 integral with the bell 30 which allows the bell 30 to perform a rotational movement around its vertical axis.
- the upper part 75 of the bearing 70 is fixed to the bell 30 while the lower part 85 of the bearing 70 can rotate freely.
- the part lower 80 rests against a stop 85 arranged below the bearing 70.
- this bearing 70 must be protected against the penetration of impurities.
- the bell 30 is held in position using a fastening system (not shown) bearing from below on the lower part 80 of the bearing 70 which pushes the bell 30 against the supply conduit 50.
- the bell fastening system 30 may include p. ex. pincers from fixation.
- a crown toothed 90 On the upper part 75 of the bearing 70 is arranged a crown toothed 90.
- the bell 30 is rotated using a motor 100 preferably comprising a reducer 110 making it possible to vary the speed of rotation of the bell 30.
- the motor 100 drives the ring gear 90 by via a toothed wheel 120 secured to the motor 100.
- a toothed wheel 120 secured to the motor 100.
- the tightness of the supply conduit 50 relative to the bell 30 is provided by a chicane 130.
- the bell 30 and the supply conduit 50 comprise a coating internal refractory material. This coating is not shown on the figures for reasons of clarity of the drawing.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Heat Treatment Of Steel (AREA)
- Coating With Molten Metal (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Description
- sur un côté "chaud", la cloche ou plus précisément le revêtement réfractaire du bord inférieur de la cloche est attaqué(e) par des chocs thermiques et par corrosion chimique sous l'effet de projections de métal et de laitier . L'usure se fait principalement par écaillage du revêtement réfractaire.
- sur le côté "froid" et éventuellement en utilisation intermittente lorsque le réfractaire s'est refroidi, la cloche "s'engraisse" par solidification de projections de métal et/ou de laitier.
- la Figure 1 montre une section transversale d'une cloche et une poche remplie d'acier liquide au repos;
- la Figure 2 montre une section transversale d'une cloche et une poche remplie d'acier liquide en position de travail et
- la Figure 3 montre un agrandissement d'un dispositif d'entraínement de la cloche.
Claims (5)
- Procédé pour minimiser l'usure locale d'une cloche pendant un traitement d'un métal liquide en poche caractérisé en ce que l'on fait tourner la cloche autour d'un axe pendant le traitement du métal liquide.
- Procédé selon la revendication 1, caractérisé en ce que la vitesse de rotation de la cloche est comprise entre 0,5 et 2 tours/min.
- Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on fait tourner la cloche autour d'un axe sensiblement perpendiculaire à la surface du métal liquide.
- Installation pour la mise en oeuvre du procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'installation comprend un dispositif d'entraínement permettant d'entraíner la cloche dans un mouvement de rotation.
- Installation selon la revendication 4, caractérisé en ce que le dispositif d'entraínement comprend une couronne dentée solidaire de la cloche entraínée par un moteur par le biais d'une roue dentée.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU90005A LU90005B1 (fr) | 1997-01-15 | 1997-01-15 | Procédé et installation pour le traitement de l'acer en poche |
| LU90005 | 1997-01-15 | ||
| PCT/EP1998/000044 WO1998031841A1 (fr) | 1997-01-15 | 1998-01-07 | Procede et installation pour le traitement de l'acier en poche |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0954615A1 EP0954615A1 (fr) | 1999-11-10 |
| EP0954615B1 true EP0954615B1 (fr) | 2001-10-04 |
Family
ID=19731652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98901944A Expired - Lifetime EP0954615B1 (fr) | 1997-01-15 | 1998-01-07 | Procede et installation pour le traitement de l'acier en poche |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US6413469B1 (fr) |
| EP (1) | EP0954615B1 (fr) |
| JP (1) | JP4201214B2 (fr) |
| AT (1) | ATE206471T1 (fr) |
| AU (1) | AU717378B2 (fr) |
| BR (1) | BR9806315A (fr) |
| CA (1) | CA2274009C (fr) |
| DE (1) | DE69801895T2 (fr) |
| LU (1) | LU90005B1 (fr) |
| RU (1) | RU2205879C2 (fr) |
| UA (1) | UA61095C2 (fr) |
| WO (1) | WO1998031841A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7767698B2 (en) | 2002-06-03 | 2010-08-03 | Mcneil Ab | Formulation and use thereof |
| EP1568790A1 (fr) * | 2004-02-24 | 2005-08-31 | Paul Wurth S.A. | Dispositif pour le traitement de métal liquide en poche |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1942202A (en) * | 1931-04-25 | 1934-01-02 | Ralph F Cohn | Rotator |
| DE1190479B (de) * | 1960-07-07 | 1965-04-08 | Jan Erik Oestberg | Vorrichtung zum Beschleunigen physikalischchemischer Vorgaenge in Metallschmelzen |
| GB1187168A (en) * | 1967-10-24 | 1970-04-08 | Standard Messo Duisburg | Improvements in or relating to the Production of Steel. |
| DE2261138C3 (de) | 1972-12-14 | 1975-05-15 | Polysius Ag, 4723 Neubeckum | Verfahren zum Einführen von Zuschlagstoffen in ein metallurgisches Bad |
| SU609591A1 (ru) * | 1976-07-08 | 1978-06-05 | Научно-производственное объединение "Тулачермет" | Устройство дл перемещени металла в кристаллизаторе |
| DE2707726A1 (de) * | 1977-02-23 | 1978-08-31 | Kloeckner Humboldt Deutz Ag | Vorrichtung zum trennen einer mischung aus komponenten, insbesondere schmelzfluessiger metalle, metallverbindungen und/oder metallhaltiger schlacke in einem fliehkraftfeld |
| CH656399A5 (de) * | 1981-05-08 | 1986-06-30 | Fischer Ag Georg | Tauch-verdampfungskammer. |
| LU84472A1 (fr) * | 1982-11-17 | 1984-06-13 | Arbed | Procede et installation pour le traitement de l'acier en poche |
| NO155447C (no) | 1984-01-25 | 1987-04-01 | Ardal Og Sunndal Verk | Anordning ved anlegg for behandling av en vaeske, f.eks. en aluminiumssmelte. |
| DE4234973C1 (de) * | 1992-10-16 | 1994-06-01 | Tech Resources Pty Ltd | Verfahren zum Schutz der feuerfesten Ausmauerung im Gasraum von metallurgischen Reaktionsgefäßen |
| NO176553C (no) * | 1993-04-14 | 1995-04-26 | Norsk Hydro As | Injeksjonsutstyr |
-
1997
- 1997-01-15 LU LU90005A patent/LU90005B1/fr active
-
1998
- 1998-01-07 US US09/341,636 patent/US6413469B1/en not_active Expired - Fee Related
- 1998-01-07 DE DE69801895T patent/DE69801895T2/de not_active Expired - Lifetime
- 1998-01-07 EP EP98901944A patent/EP0954615B1/fr not_active Expired - Lifetime
- 1998-01-07 BR BR9806315-4A patent/BR9806315A/pt not_active IP Right Cessation
- 1998-01-07 JP JP53361298A patent/JP4201214B2/ja not_active Expired - Lifetime
- 1998-01-07 CA CA002274009A patent/CA2274009C/fr not_active Expired - Fee Related
- 1998-01-07 AT AT98901944T patent/ATE206471T1/de active
- 1998-01-07 AU AU58620/98A patent/AU717378B2/en not_active Ceased
- 1998-01-07 WO PCT/EP1998/000044 patent/WO1998031841A1/fr not_active Ceased
- 1998-01-07 RU RU99117542/02A patent/RU2205879C2/ru not_active IP Right Cessation
- 1998-07-01 UA UA99084660A patent/UA61095C2/uk unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP0954615A1 (fr) | 1999-11-10 |
| CA2274009C (fr) | 2007-05-01 |
| AU5862098A (en) | 1998-08-07 |
| WO1998031841A1 (fr) | 1998-07-23 |
| ATE206471T1 (de) | 2001-10-15 |
| DE69801895D1 (de) | 2001-11-08 |
| AU717378B2 (en) | 2000-03-23 |
| BR9806315A (pt) | 2000-03-14 |
| UA61095C2 (uk) | 2003-11-17 |
| JP4201214B2 (ja) | 2008-12-24 |
| CA2274009A1 (fr) | 1998-07-23 |
| LU90005B1 (fr) | 1998-07-16 |
| US6413469B1 (en) | 2002-07-02 |
| JP2001508132A (ja) | 2001-06-19 |
| RU2205879C2 (ru) | 2003-06-10 |
| DE69801895T2 (de) | 2002-04-25 |
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