WO2004020679A1 - Dispositif d'injection d'un gaz de traitement dans un metal liquide - Google Patents
Dispositif d'injection d'un gaz de traitement dans un metal liquide Download PDFInfo
- Publication number
- WO2004020679A1 WO2004020679A1 PCT/FR2003/002591 FR0302591W WO2004020679A1 WO 2004020679 A1 WO2004020679 A1 WO 2004020679A1 FR 0302591 W FR0302591 W FR 0302591W WO 2004020679 A1 WO2004020679 A1 WO 2004020679A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- injection device
- rod
- tank
- nozzle
- orifice
- Prior art date
Links
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
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
-
- 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
- B22D1/002—Treatment with gases
- B22D1/005—Injection assemblies therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
- B22D41/42—Features relating to gas injection
-
- 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
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
- C22B21/064—Obtaining aluminium refining using inert or reactive gases
Definitions
- the present invention relates, on the one hand, to a device for injecting a treatment gas into a liquid metal contained in a tank, and on the other hand, to a tank used in metallurgy and comprising at least one such injection device.
- liquid metal possibly consisting in particular of aluminum, an aluminum alloy, magnesium, or a magnesium alloy.
- the treatment of liquid metal generally aims to rid it of dissolved gases, in particular hydrogen, but also of dissolved impurities, such as alkali metals, and solid or liquid inclusions which could adversely affect the quality of the cast products.
- this treatment step is carried out by injecting a treatment gas into the liquid metal contained in a tank.
- the treatment gas can consist of an inert gas which is insoluble in the liquid metal, such as argon, a reactive gas such as chlorine, or a mixture of these.
- the inert and insoluble gas absorbs the dissolved gas by dilution effect and carries it with it.
- the reactive gas reacts with certain dissolved impurities and thus generates liquid or solid inclusions which, like those already present in the liquid metal, can be removed by a filtration operation.
- US Patent 5,846,479 describes an on-line tank for treating a flow of liquid metal comprising a plurality of nozzles fixed in a wall of the tank. Part of each nozzle is located outside the tank and another part thereof has an end orifice housed inside the tank. However, this end orifice has a very fine diameter which is liable to be blocked by the liquid metal and the metal oxides.
- the cleaning of this orifice can be carried out after stopping the installation and opening the tank, from inside the latter. This nevertheless constitutes a laborious operation which results in a loss of time and a break in the treatment process.
- the object of the invention is to provide a device making it possible to clear the orifice of each nozzle during the very operation of the installation.
- the invention relates to a device for injecting a treatment gas into a liquid metal contained in a tank, said device being intended to be fixed in one of the walls of the tank and comprising at least one nozzle.
- injection provided with an end orifice, characterized in that it comprises a movable means which can be maneuvered from outside the injection device and capable of unblocking said end orifice of the nozzle.
- the treatment gas used is an inert gas or a reactive gas
- Said movable means is advantageously able to pass through the end orifice, which makes it easier to unclog the latter.
- the movable means comprises a rod mounted to slide inside the nozzle, said rod being able to pass from a rest position, during which it is located set back from the end orifice. of the nozzle so as to allow the passage of the treatment gas, to an advanced position, in which it may possibly emerge from the end orifice.
- the rod has an upstream part which is, on the one hand, capable of sealingly crossing one end of the nozzle opposite the end orifice, and on the other hand, equipped with a manual control unit.
- the latter advantageously comprises a handle.
- the device comprises an elastic element, typically a spring, allowing the rod to be held in the rest position.
- an elastic element typically a spring
- an automated control member is attached to the rod.
- This control member can be produced for example using an operating element acting on the sliding of the rod, such as a pneumatic, electric or electromechanical element.
- These automated components can be controlled by an operator or by a programmable system. It is then advantageous, in the case where several injection devices are provided, to associate one or more operating elements, so as to cause the sliding of the different rods.
- the nozzle preferably contains at least one means for guiding the rod. This can be constituted by a ring having a central orifice and peripheral orifices. The rod then slides through the central orifice of the ring and the injected gas passes through the peripheral orifices.
- the diameter of the rod decreases towards the end orifice of the nozzle.
- the present invention also relates to a liquid metal treatment tank, such as a liquid metal flow treatment tank (called "in-line treatment tank”), characterized in that it comprises at minus a gas injection device according to the invention.
- a liquid metal treatment tank such as a liquid metal flow treatment tank (called "in-line treatment tank")
- in-line treatment tank characterized in that it comprises at minus a gas injection device according to the invention.
- an automated control member This can for example be achieved using a camshaft whose cams are fixed at an angular offset.
- the invention also relates to the use of the liquid metal treatment tank defined above.
- the liquid metal may be aluminum, an aluminum alloy, magnesium or a magnesium alloy. The invention will be better understood using the detailed description below and the appended figures.
- Figure 1 is a cross-sectional view of a tank comprising several injection devices according to the invention.
- FIG. 2 is a partial sectional view of the tank along the line II-II in FIG. 1.
- FIG. 1 A tank 1 according to an advantageous embodiment of the invention is shown in FIG. 1.
- This tank 1 comprises a side wall 2 and a bottom 3 making it possible to define a treatment compartment 4, a cover 5, inlet 6 and outlet 7 means for the liquid metal, and injection devices 8 for a gas. treatment according to the invention.
- the or each injection device 8 is typically fixed in the side wall 2 of the tank 1 which is constituted by an assembly of layers 9 to 1 1, the outer layer 9 being made of metal (and is generally called “box") and the other layers 10 and 11 being produced in refractory materials.
- Layer 10 which can be formed from several superimposed layers, generally has the function of thermally insulating the tank.
- the layer 11 is more specifically able to resist liquid metal.
- FIG. 2 more specifically illustrates an advantageous embodiment of one of the injection devices 8.
- the injection device 8 comprises a metal rod 14 which can slide in a substantially tubular housing, the latter also being used for the admission of the treatment gas into the treatment compartment 4 of the tank 1. More specifically, the injection device 8 breaks down, on the one hand, into an upstream part 15 situated outside the tank 1, this upstream part 15 being fixed at one of its ends in a connecting element 16 hollow which is in free communication with a reservoir of treatment gas (not shown), and on the other hand, in a downstream part 17 comprising a nozzle 18, fixed in the connecting element 16.
- the nozzle 18 has an orifice end 19 located inside the treatment compartment 4 of the tank 1.
- the rod 14 has a first end, located outside of the tank 1 and of the injection device 8, to which is attached a handle 20, and a second end housed in the tank 1. Apart from an annular shoulder 21 secured to the rod 14 in the vicinity of its first end, the rod 14 has a diameter which typically decreases irregularly in the direction of its second end. A spring 22, introduced by the second end of the rod 14, is placed around the latter and has a diameter slightly smaller than that of the shoulder 21.
- the upstream part 15 is produced from a substantially tubular body 24 having an upstream end, a central channel, and a downstream end. At the upstream end, the diameter of the central channel is substantially equal to that presented by the projection 21 of the rod 14. A first seal 25 is fixed in the body 24 and is intended to cooperate with the shoulder 21 when the rod 14 is inserted in the central channel. At the downstream end, the central channel has an internal shoulder 26 whose diameter is substantially equal to that of the rod 14. A second seal 27 is fixed in this shoulder 26. The sealing means 25, 27 are particularly advantageous when the treatment gas is reactive.
- the spring 22 which is not subjected to any stress, is in abutment against the shoulder 21 and the internal shoulder 26.
- a nut 28 having a central orifice whose diameter is substantially equal to that of the rod 14 and therefore less than that of the shoulder 21, is screwed around the upstream end of the body 24 so as to prevent accidental extraction of the rod 14.
- the connecting element 16 is provided with a central channel in which the rod 14 can slide and a peripheral recess in which can be inserted a pipe 29 coming from the treatment gas tank.
- the nozzle 18 of the downstream part 17 is produced more particularly from a metal tube 30 having, on the one hand, a first end fixed in the downstream end of the element connecting 16, and secondly, a second end which encloses a substantially tubular metal body 31.
- This body 31 has a beveled end which bears against the upstream end, produced in the form of an bevelled external shoulder 33, of a nozzle 34 made of refractory material which moreover has a downstream end ending in the orifice. end 19.
- This nozzle 34 is stabilized using a nut 35 screwed into the body 31 and having a central orifice whose diameter is substantially equal to that of said nozzle 34.
- the second end of the nozzle 18 is finally inserted into a body 37 of refractory material which has a conical recess and which is fixed in the layer 1 1 of the side wall 2 of the tank 1. At rest, the second end of the rod 14 is then set back from the end orifice 19 of the nozzle 34.
- the injection device 8 is fixedly held by means of a support produced from two metal rods 38, 39 which each have an end secured to a notch of the metallic layer 9 of the side wall 2 of the tank 1.
- a plate 40 comprising a central perforation and two peripheral perforations is slid and then fixed along the two rods 38, 39. The injection device 8 is first slid through the central perforation of the plate 40, then fixed when it is properly positioned.
- the treatment gas used can also consist of an inert and insoluble gas such as argon, as well as a reactive gas such as chlorine, or a mixture of these.
- this treatment gas is introduced into the connecting element 16 and is brought to pass through the downstream part 17 of the injection device 8. It is finally ejected through the end orifice 19 of the nozzle 34 in the treatment compartment 4 containing the liquid metal.
- a liquid metal 41 can be treated according to a process typically comprising:
- the operation of placing the on-line treatment tank typically comprises the connection of the latter to at least one chute 12 for supplying liquid metal and at least one chute 13 for discharging the liquid metal.
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)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Coating With Molten Metal (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Furnace Charging Or Discharging (AREA)
- Gas Separation By Absorption (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Nozzles (AREA)
Abstract
Description
Claims
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/524,119 US7364690B2 (en) | 2002-08-28 | 2003-08-27 | Device for injecting a treatment gas into a molten metal |
DE60330249T DE60330249D1 (de) | 2002-08-28 | 2003-08-27 | Vorrichtung zum injektieren eines behandlungsgases in eine metallschmelze |
AT03758283T ATE449873T1 (de) | 2002-08-28 | 2003-08-27 | Vorrichtung zum injektieren eines behandlungsgases in eine metallschmelze |
PL374638A PL198454B1 (pl) | 2002-08-28 | 2003-08-27 | Urządzenie do wtryskiwania gazu do obróbki w roztopiony metal |
MXPA05002119A MXPA05002119A (es) | 2002-08-28 | 2003-08-27 | Dispositivo de inyeccion de un gas de tratamiento en un metal liquido. |
SI200331726T SI1532284T1 (sl) | 2002-08-28 | 2003-08-27 | Priprava za injiciranje delovnega plina v kovinsko talino |
BR0313807-0A BR0313807A (pt) | 2002-08-28 | 2003-08-27 | Dispositivo de injeção de um gás de tratamento em um metal lìquido |
EP03758283A EP1532284B1 (fr) | 2002-08-28 | 2003-08-27 | Dispositif d'injection d'un gaz de traitement dans un metal liquide |
AU2003274293A AU2003274293B2 (en) | 2002-08-28 | 2003-08-27 | Device for injecting a treatment gas into a molten metal |
JP2004532234A JP4594090B2 (ja) | 2002-08-28 | 2003-08-27 | 溶融金属内に処理用ガスを注入する装置 |
CA2495766A CA2495766C (fr) | 2002-08-28 | 2003-08-27 | Dispositif d'injection d'un gaz de traitement dans un metal liquide |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0210675A FR2843974B1 (fr) | 2002-08-28 | 2002-08-28 | Dispositif d'injection d'un gaz de traitement dans un metal liquide |
FR02/10675 | 2002-08-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004020679A1 true WO2004020679A1 (fr) | 2004-03-11 |
Family
ID=31502952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2003/002591 WO2004020679A1 (fr) | 2002-08-28 | 2003-08-27 | Dispositif d'injection d'un gaz de traitement dans un metal liquide |
Country Status (16)
Country | Link |
---|---|
US (1) | US7364690B2 (fr) |
EP (1) | EP1532284B1 (fr) |
JP (1) | JP4594090B2 (fr) |
AT (1) | ATE449873T1 (fr) |
AU (1) | AU2003274293B2 (fr) |
BR (1) | BR0313807A (fr) |
CA (1) | CA2495766C (fr) |
DE (1) | DE60330249D1 (fr) |
ES (1) | ES2335098T3 (fr) |
FR (1) | FR2843974B1 (fr) |
MX (1) | MXPA05002119A (fr) |
PL (1) | PL198454B1 (fr) |
PT (1) | PT1532284E (fr) |
RU (1) | RU2316605C2 (fr) |
SI (1) | SI1532284T1 (fr) |
WO (1) | WO2004020679A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2471874C1 (ru) * | 2011-12-19 | 2013-01-10 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Национальный исследовательский технологический университет "МИСиС" | Способ удаления титана из высокохромистых расплавов |
CN103966463A (zh) * | 2013-02-04 | 2014-08-06 | 宁夏鹏程致远自动化技术有限公司 | 风机气流用宝塔式拉瓦尔吹扫喷嘴 |
CN103557709B (zh) * | 2013-05-02 | 2016-07-06 | 莫连云 | 炉工轨道车 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5667687A (en) * | 1994-12-23 | 1997-09-16 | Serck Baker Limited | Cyclone |
US5846479A (en) * | 1996-05-15 | 1998-12-08 | Cast House Technology Ltd. | Apparatus for de-gassing molten metal |
DE29904385U1 (de) * | 1999-03-10 | 1999-09-16 | Wirth Josef | Düsenreiniger für Leimgerät |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US570129A (en) * | 1896-10-27 | Device for preventing obstruction of blast in blast-furnaces | ||
US1034995A (en) * | 1912-03-13 | 1912-08-06 | Prime Edward Gannon | Converter-valve. |
US2261559A (en) * | 1940-08-02 | 1941-11-04 | Phelps Dodge Corp | Tuyere |
US2922175A (en) * | 1955-12-12 | 1960-01-26 | Villiers Willem Johannes De | Tuyere punches and like machines |
CA1060647A (fr) * | 1977-03-10 | 1979-08-21 | Noranda Mines Limited | Silencieux pour poinconneuse de tuyere |
JPS585974B2 (ja) * | 1979-07-23 | 1983-02-02 | 日本鉱業株式会社 | 転炉羽口の自動搾孔方法 |
SU863188A1 (ru) * | 1980-01-16 | 1981-09-15 | Предприятие П/Я Г-4236 | Форсунка дл получени металлического порошка |
JPS61177342A (ja) * | 1985-02-02 | 1986-08-09 | Agency Of Ind Science & Technol | アルミニウムの精製方法 |
JPS63307225A (ja) * | 1987-06-08 | 1988-12-14 | Onahama Smelt & Refining Co Ltd | 転炉用パンチング装置 |
CA2029680A1 (fr) * | 1990-11-09 | 1992-05-10 | Francois Tremblay | Dispositif d'injection par jet de gaz dans un metal en fusion |
JPH0926271A (ja) * | 1995-07-11 | 1997-01-28 | Sumitomo Metal Mining Co Ltd | 非鉄製錬横型転炉用パンチングロッド |
-
2002
- 2002-08-28 FR FR0210675A patent/FR2843974B1/fr not_active Expired - Lifetime
-
2003
- 2003-08-27 SI SI200331726T patent/SI1532284T1/sl unknown
- 2003-08-27 US US10/524,119 patent/US7364690B2/en not_active Expired - Lifetime
- 2003-08-27 AT AT03758283T patent/ATE449873T1/de active
- 2003-08-27 WO PCT/FR2003/002591 patent/WO2004020679A1/fr active Application Filing
- 2003-08-27 BR BR0313807-0A patent/BR0313807A/pt not_active Application Discontinuation
- 2003-08-27 PT PT03758283T patent/PT1532284E/pt unknown
- 2003-08-27 MX MXPA05002119A patent/MXPA05002119A/es active IP Right Grant
- 2003-08-27 EP EP03758283A patent/EP1532284B1/fr not_active Expired - Lifetime
- 2003-08-27 PL PL374638A patent/PL198454B1/pl unknown
- 2003-08-27 RU RU2005108599/02A patent/RU2316605C2/ru not_active IP Right Cessation
- 2003-08-27 JP JP2004532234A patent/JP4594090B2/ja not_active Expired - Lifetime
- 2003-08-27 CA CA2495766A patent/CA2495766C/fr not_active Expired - Lifetime
- 2003-08-27 ES ES03758283T patent/ES2335098T3/es not_active Expired - Lifetime
- 2003-08-27 AU AU2003274293A patent/AU2003274293B2/en not_active Expired
- 2003-08-27 DE DE60330249T patent/DE60330249D1/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5667687A (en) * | 1994-12-23 | 1997-09-16 | Serck Baker Limited | Cyclone |
US5846479A (en) * | 1996-05-15 | 1998-12-08 | Cast House Technology Ltd. | Apparatus for de-gassing molten metal |
DE29904385U1 (de) * | 1999-03-10 | 1999-09-16 | Wirth Josef | Düsenreiniger für Leimgerät |
Also Published As
Publication number | Publication date |
---|---|
PL374638A1 (en) | 2005-10-31 |
CA2495766C (fr) | 2011-02-01 |
US20050253315A1 (en) | 2005-11-17 |
FR2843974B1 (fr) | 2005-01-28 |
CA2495766A1 (fr) | 2004-03-11 |
EP1532284A1 (fr) | 2005-05-25 |
JP4594090B2 (ja) | 2010-12-08 |
JP2005537389A (ja) | 2005-12-08 |
AU2003274293B2 (en) | 2008-08-14 |
BR0313807A (pt) | 2005-07-12 |
MXPA05002119A (es) | 2005-06-06 |
PL198454B1 (pl) | 2008-06-30 |
ES2335098T3 (es) | 2010-03-22 |
AU2003274293A1 (en) | 2004-03-19 |
PT1532284E (pt) | 2010-01-14 |
US7364690B2 (en) | 2008-04-29 |
ATE449873T1 (de) | 2009-12-15 |
RU2005108599A (ru) | 2005-10-27 |
FR2843974A1 (fr) | 2004-03-05 |
EP1532284B1 (fr) | 2009-11-25 |
DE60330249D1 (de) | 2010-01-07 |
SI1532284T1 (sl) | 2010-02-26 |
RU2316605C2 (ru) | 2008-02-10 |
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