EP1532284B1 - Vorrichtung zum injektieren eines behandlungsgases in eine metallschmelze - Google Patents

Vorrichtung zum injektieren eines behandlungsgases in eine metallschmelze Download PDF

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Publication number
EP1532284B1
EP1532284B1 EP03758283A EP03758283A EP1532284B1 EP 1532284 B1 EP1532284 B1 EP 1532284B1 EP 03758283 A EP03758283 A EP 03758283A EP 03758283 A EP03758283 A EP 03758283A EP 1532284 B1 EP1532284 B1 EP 1532284B1
Authority
EP
European Patent Office
Prior art keywords
rod
injection device
nozzle
tank
orifice
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
Application number
EP03758283A
Other languages
English (en)
French (fr)
Other versions
EP1532284A1 (de
Inventor
Robert Paret
Daniel Coudry
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.)
Novelis Inc Canada
Original Assignee
Novelis Inc Canada
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 Novelis Inc Canada filed Critical Novelis Inc Canada
Priority to SI200331726T priority Critical patent/SI1532284T1/sl
Publication of EP1532284A1 publication Critical patent/EP1532284A1/de
Application granted granted Critical
Publication of EP1532284B1 publication Critical patent/EP1532284B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C22B9/05—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 vessel. injection device.
  • the liquid metal may consist 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, including hydrogen, but also dissolved impurities, such as alkali metals, and solid or liquid inclusions that could 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 process gas may be an inert gas and insoluble in the liquid metal, such as argon, to a reactive gas such as chlorine, or a mixture thereof.
  • 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.
  • the patent US 5,846,479 discloses an in-line treatment tank of a liquid metal stream having a plurality of nozzles fixed in a wall of the tank. Part of each nozzle is located outside the vessel and another portion thereof has an end port housed within the vessel. However, this end port has a very fine diameter which is likely to be obstructed by the liquid metal and the metal oxides.
  • SU-A-863,188 discloses a liquid metal ejection nozzle associated with a rod for unclogging this nozzle.
  • US-A-5,667,687 discloses a cyclone provided with an unblocking device, comprising a rod movable relative to a cyclone orifice, in order to remove any solid material present in this orifice.
  • the object of the invention is to provide a device for performing the unclogging of the orifice of each nozzle during the 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 of injection provided with an end orifice, characterized in that it comprises a movable means operable from the outside of the injection device and able to unclog said end orifice of the nozzle, and in that the moving means comprises a rod slidably mounted inside the nozzle, said rod being able to pass from a rest position, during which it is set back from the end orifice of the nozzle so as to allow the passage of the treatment gas, at an advanced position, in which it may eventually lead to the end port.
  • the treatment gas used is an inert gas or a reactive gas
  • perforating and / or repelling the deposits obstructing the end orifice of the nozzle with the aid of the mobile means that can be operated since outside the tank, continue the liquid metal treatment process without altering the quality of treatment.
  • Said movable means is advantageously adapted to pass through the end orifice, which facilitates the unclogging thereof.
  • the rod has an upstream portion which is, on the one hand, able to pass through one end of the nozzle opposite the end orifice, and on the other hand, equipped with a manual control device.
  • the latter advantageously comprises a handle.
  • the device comprises an elastic element, typically a spring, for maintaining the rod in the rest position.
  • an elastic element typically a spring
  • an automated control member is attached to the rod.
  • This control member may be made for example by means of an operating element acting on the sliding of the rod; such as a pneumatic, electrical or electromechanical element.
  • These automated devices 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 may 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 tank for treating a liquid metal, such as a tank for treating a flow of liquid metal (called “in-line treatment tank”), characterized in that it comprises at least one less a gas injection device according to the invention.
  • in-line treatment tank a tank for treating a flow of liquid metal
  • it is then advantageous to actuate the latter in a time shift with the aid of an automated control member. This can for example be achieved using a camshaft whose cams are fixed in an angular offset.
  • the invention also relates to the use of the liquid metal processing tank defined above.
  • the liquid metal may be aluminum, an aluminum alloy, magnesium or a magnesium alloy.
  • FIG. figure 1 A tank 1 according to an advantageous embodiment of the invention is shown in FIG. figure 1 .
  • This tank 1 comprises a side wall 2 and a bottom 3 for defining a treatment compartment 4, a cover 5, input means 6 and outlet 7 of the liquid metal, and injection devices 8 of 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 11, the outer layer 9 being made of metal (and is generally called a "box") and the other layers 10 and 11 being made of refractory materials.
  • the figure 2 illustrates more specifically an advantageous embodiment of one of the injection devices 8.
  • the injection device 8 comprises a metal rod 14 slidable in a substantially tubular housing, the latter being also used for the admission of the treatment gas within the treatment compartment 4 of the vessel 1.
  • the injection device 8 is broken 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 treatment gas tank (not shown), and secondly, in a downstream portion 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 the tank 1 and the injection device 8, to which is attached a handle 20, and a second end housed in the vessel 1. Except an annular shoulder 21 secured to the rod 14 in the vicinity of its first end, the rod 14 has a diameter that decreases typically non-uniformly towards its second end. A spring 22, introduced by the second end of the rod 14, is placed around it and has a diameter slightly smaller than that of the shoulder 21.
  • the upstream portion 15 is made 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 protrusion 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 introduced in the central channel.
  • 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 process gas is reactive.
  • the spring 22 which is not subjected to any stress, is in abutment against the shoulder 21 and the inner 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 prohibit the accidental extraction of the rod 14.
  • the connecting member 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 from the treatment gas tank.
  • the nozzle 18 of the downstream portion 17 is made more particularly from a metal tube 30 having, on the one hand, a first end fixed in the downstream end of the element link 16, and secondly, a second end which encloses a substantially tubular metal body 31 .
  • This body 31 has a bevelled end which abuts against the upstream end, in the form of a beveled outer shoulder 33 , a nozzle 34 made of refractory material which also has a downstream end ending in the orifice end 19.
  • This nozzle 34 is stabilized with 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 in a body 37 of refractory material which has a conical recess and which is fixed in the layer 11 of the side wall 2 of the vessel 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 a support made from two metal rods 38, 39 which each have an end secured to a notch of the metal layer 9 of the side wall 2 of the vessel. 1.
  • a plate 40 having 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, and fixed when properly positioned.
  • the process gas used may be an inert and insoluble gas such as argon, a reactive gas such as chlorine, or a mixture thereof.
  • this process gas is introduced into the connecting element 16 and is passed 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.
  • An advantage therefore lies in the fact that it is possible to adjust this automated control member so that the various injection devices 8 are actuated in a time shift.
  • the operation of placing the in-line treatment tank typically comprises connecting it to at least one chute 12 for supplying molten metal and at least one chute 13 for discharging the liquid metal.

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)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Coating With Molten Metal (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Gas Separation By Absorption (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Nozzles (AREA)

Claims (13)

  1. Vorrichtung (8) zur Injektion eines Behandlungsgases in eine in einem Behälter (1) enthaltene Metallschmelze, wobei die Vorrichtung dazu ausgelegt ist, in einer der Wände (2) des Behälters befestigt zu werden, und mindestens eine Injektionsdüse (18) aufweist, die mit einer Endöffnung (19) versehen ist,
    dadurch gekennzeichnet,
    daß sie eine bewegliche Einrichtung (14) aufweist, die von der Außenseite der Injektionsvorrichtung betätigbar ist und dazu dient, die Endöffnung der Düse freizumachen,
    und daß die bewegliche Einrichtung eine Stange (14) aufweist, die gleitbeweglich in dem Innenraum der Düse (18) angebracht ist, wobei die Stange dazu ausgelegt ist, sich aus einer Ruhestellung, in welcher sie aus der Endöffnung (19) zurückgezogen ist, um den Durchtritt des Behandlungsgases zu ermöglichen, in eine vorgeschobene Stellung zu bewegen.
  2. Injektionsvorrichtung (8) nach Anspruch 1,
    dadurch gekennzeichnet,
    daß die bewegliche Einrichtung (14) dazu ausgelegt ist, durch die Endöffnung (19) hindurchzutreten.
  3. Injektionsvorrichtung (8) nach Anspruch 1 oder 2,
    dadurch gekennzeichnet,
    daß die Stange (14) in der vorgeschobenen Stellung aus der Endöffnung (19) hervortritt.
  4. Injektionsvorrichtung (8) nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet,
    daß die Stange (14) einen vorderen Bereich aufweist, der einerseits dazu ausgelegt ist, in dichter Weise durch ein der Endöffnung (19) entgegengesetztes Ende der Düse (18) hindurchzutreten, und andererseits mit einem manuellen Betätigungsorgan (20) ausgestattet ist.
  5. Injektionsvorrichtung (8) nach Anspruch 4,
    dadurch gekennzeichnet,
    daß das manuelle Betätigungsorgan einen Griff (20) aufweist.
  6. Injektionsvorrichtung (8) nach einem der Ansprüche 4 oder 5,
    dadurch gekennzeichnet,
    daß sie ein elastisches Element (22) aufweist, das es ermöglicht, die Stange (14) in der Ruhestellung zu halten.
  7. Injektionsvorrichtung (8) nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet,
    daß ein automatisiertes Betätigungsorgan an die Stange (14) angeschlossen ist.
  8. Injektionsvorrichtung (8) nach einem der Ansprüche 1 bis 7,
    dadurch gekennzeichnet,
    daß die Düse (18) mindestens eine Führungseinrichtung für die Stange (14) aufweist.
  9. Injektionsvorrichtung nach Anspruch 8,
    dadurch gekennzeichnet,
    daß die Führungseinrichtung aus einem Ring besteht, der eine Mittelöffnung und Umfangsöffnungen aufweist.
  10. Injektionsvorrichtung (8) nach einem der Ansprüche 1 bis 9,
    dadurch gekennzeichnet,
    daß der Durchmesser der Stange (14) im Querschnitt in Richtung der Endöffnung (19) der Düse (18) abnimmt.
  11. Behälter (1) zum Behandeln einer Metallschmelze,
    dadurch gekennzeichnet,
    daß er mindestens eine Gasinjektionsvorrichtung (8) nach einem der Ansprüche 1 bis 10 aufweist.
  12. Verwendung der Vorrichtung nach einem der Ansprüche 1 bis 10 bzw. des Behälters nach Anspruch 11
    zum Behandeln des Fließzustandes einer Metallschmelze.
  13. Verwendung nach Anspruch 12,
    dadurch gekennzeichnet,
    daß die Metallschmelze Aluminium, eine Aluminiumlegierung, Magnesium oder eine Magnesiumlegierung ist.
EP03758283A 2002-08-28 2003-08-27 Vorrichtung zum injektieren eines behandlungsgases in eine metallschmelze Expired - Lifetime EP1532284B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200331726T SI1532284T1 (sl) 2002-08-28 2003-08-27 Priprava za injiciranje delovnega plina v kovinsko talino

Applications Claiming Priority (3)

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
FR0210675 2002-08-28
PCT/FR2003/002591 WO2004020679A1 (fr) 2002-08-28 2003-08-27 Dispositif d'injection d'un gaz de traitement dans un metal liquide

Publications (2)

Publication Number Publication Date
EP1532284A1 EP1532284A1 (de) 2005-05-25
EP1532284B1 true EP1532284B1 (de) 2009-11-25

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EP03758283A Expired - Lifetime EP1532284B1 (de) 2002-08-28 2003-08-27 Vorrichtung zum injektieren eines behandlungsgases in eine metallschmelze

Country Status (16)

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US (1) US7364690B2 (de)
EP (1) EP1532284B1 (de)
JP (1) JP4594090B2 (de)
AT (1) ATE449873T1 (de)
AU (1) AU2003274293B2 (de)
BR (1) BR0313807A (de)
CA (1) CA2495766C (de)
DE (1) DE60330249D1 (de)
ES (1) ES2335098T3 (de)
FR (1) FR2843974B1 (de)
MX (1) MXPA05002119A (de)
PL (1) PL198454B1 (de)
PT (1) PT1532284E (de)
RU (1) RU2316605C2 (de)
SI (1) SI1532284T1 (de)
WO (1) WO2004020679A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
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 (1)

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Publication number Priority date Publication date Assignee Title
SU863188A1 (ru) * 1980-01-16 1981-09-15 Предприятие П/Я Г-4236 Форсунка дл получени металлического порошка

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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 (en) * 1977-03-10 1979-08-21 Noranda Mines Limited Silencer for use on tuyere punchers
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
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 (en) * 1990-11-09 1992-05-10 Francois Tremblay Jet flow device for injecting gas into molten metal
GB9426149D0 (en) * 1994-12-23 1995-02-22 Serck Baker Ltd Deblocking device
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
GB9610180D0 (en) * 1996-05-15 1996-07-24 English Christopher J Trough degassing reactor
DE29904385U1 (de) * 1999-03-10 1999-09-16 Wirth Josef Düsenreiniger für Leimgerät

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
SU863188A1 (ru) * 1980-01-16 1981-09-15 Предприятие П/Я Г-4236 Форсунка дл получени металлического порошка

Also Published As

Publication number Publication date
US7364690B2 (en) 2008-04-29
MXPA05002119A (es) 2005-06-06
CA2495766A1 (fr) 2004-03-11
AU2003274293A1 (en) 2004-03-19
PT1532284E (pt) 2010-01-14
PL198454B1 (pl) 2008-06-30
RU2005108599A (ru) 2005-10-27
BR0313807A (pt) 2005-07-12
PL374638A1 (en) 2005-10-31
FR2843974A1 (fr) 2004-03-05
FR2843974B1 (fr) 2005-01-28
SI1532284T1 (sl) 2010-02-26
EP1532284A1 (de) 2005-05-25
ATE449873T1 (de) 2009-12-15
US20050253315A1 (en) 2005-11-17
JP4594090B2 (ja) 2010-12-08
JP2005537389A (ja) 2005-12-08
ES2335098T3 (es) 2010-03-22
DE60330249D1 (de) 2010-01-07
WO2004020679A1 (fr) 2004-03-11
AU2003274293B2 (en) 2008-08-14
RU2316605C2 (ru) 2008-02-10
CA2495766C (fr) 2011-02-01

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