EP0468832B1 - Ofen zum Halten der Temperatur und zur metallurgischen Behandlung - Google Patents

Ofen zum Halten der Temperatur und zur metallurgischen Behandlung Download PDF

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Publication number
EP0468832B1
EP0468832B1 EP91401742A EP91401742A EP0468832B1 EP 0468832 B1 EP0468832 B1 EP 0468832B1 EP 91401742 A EP91401742 A EP 91401742A EP 91401742 A EP91401742 A EP 91401742A EP 0468832 B1 EP0468832 B1 EP 0468832B1
Authority
EP
European Patent Office
Prior art keywords
chamber
furnace according
furnace
passage
burner
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
EP91401742A
Other languages
English (en)
French (fr)
Other versions
EP0468832A1 (de
Inventor
Jean Foulard
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.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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 Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP0468832A1 publication Critical patent/EP0468832A1/de
Application granted granted Critical
Publication of EP0468832B1 publication Critical patent/EP0468832B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F27D27/00—Stirring devices for molten material
    • 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
    • B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
    • B22D41/01—Heating means
    • 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/06—Constructional features of mixers for pig-iron
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/04—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/06—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces with movable working chambers or hearths, e.g. tiltable, oscillating or describing a composed movement
    • F27B3/065—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces with movable working chambers or hearths, e.g. tiltable, oscillating or describing a composed movement tiltable
    • 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
    • F27D2003/161—Introducing a fluid jet or current into the charge through a porous element
    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • F27D2099/004—Heating elements or systems using burners directed upon the charge, e.g. vertically

Definitions

  • the present invention relates to a furnace for maintaining the temperature and metallurgical treatment of a metal in the liquid state, of the type comprising a container of liquid metal equipped, in the upper part, with a burner of the oxygen-fuel or air-type oxy-fuel, in the lower part, of at least one porous plug for the injection of a neutral stirring gas, and of opening means for the introduction and / or the withdrawal of charges.
  • mixers in the form of pockets lined with refractories and equipped with an air-fuel burner to store the liquid metal as it leaves the melting apparatus and attempt to limit the temperature drop before its subsequent use.
  • induction furnaces crucibles for medium capacities, with channels for the largest, but in cast iron foundries, the investment and operating costs of induction are very important.
  • an aluminothermic operation is carried out directly in a bag consisting of an addition of aluminum to the metal, then an injection of oxygen and a mixing of homogenization and decantation of the liquid metal at l help of argon.
  • This process although used industrially, heats the metal, but does not allow any metallurgical treatment.
  • a holding oven has been produced in the form of the traditional metallurgical ladle, which has been fitted with an oxy-fuel burner, mounted through an attached ladle cover. , and a porous bottom plug, all allowing good heat transfer.
  • This achievement is however extremely rudimentary, and it leads to losses significant thermal and does not allow the implementation of metallurgical treatments.
  • the subject of the present invention is a furnace for maintaining the temperature and metallurgical treatment of a metal in the liquid state making it possible not only to limit the temperature drop but also a certain reheating of the liquid metal and also treatment additions and which , in addition to the storage and heating of the metal, makes it possible to adjust or modify the chemical composition of the latter and optionally to make it react with other elements such as a slag for example.
  • the container is made in the form of a closed insulated cylindrical enclosure tiltable around its longitudinal axis, arranged horizontally and having a vault and two passages with vertical component, one at a end of the enclosure, in the form of a chimney opening into the enclosure near the vault of the enclosure and serving for the introduction of liquid metal, the other, in the vicinity of an opposite end, in the form of an opening chute internally at the level of the bottom of the enclosure and the outlet of which comes, in the position of withdrawal of liquid metal, in a tilted position of said enclosure, the burner being mounted in the roof of the enclosure, on the side of the withdrawal passage.
  • the enclosure is almost completely closed, which simplifies handling and avoids excessive heat loss, while allowing metallurgical treatment maneuvers, such as the introduction of reactive products.
  • the neutral argon or nitrogen gas blown from the bottom allows thermal and metallurgical homogenization.
  • an oven is in the form of a cylindrical enclosure 2 and two bottom walls 3 and 4, made of refractory material, if necessary with an additional thermal insulation.
  • This cylindrical enclosure is designed so that the ratio between the axial length L and its diameter A is advantageously between 1.4 and 1.8 and preferably of the order of 1.6 to, on the one hand limit the losses walls and, on the other hand, minimize variations in the height of the liquid metal.
  • This cylindrical enclosure is mounted on a horizontal tilting axis XY along the axis of the cylinder.
  • a liquid metal introduction passage 5 in the form of a chimney passing through the bottom wall 3 and opening into this furnace at 6 at a high level of the furnace.
  • a second passage 7 is formed, in the vicinity of the other wall 4, by a lateral extension in refractory and opens tangentially at 8 to the internal wall of the enclosure 1 and, in the operational position - position visible in FIG. 2- s pupil to lead into 9 at a level higher than the maximum level N1 of liquid metal 10.
  • a service door 12 also forming an access passage for the release of any supernatant dross as shown at 11 in FIG. 2.
  • At least two porous plugs 14 and 15 are arranged in the low position through the cylindrical enclosure wall 2, one 14 closer to the end wall 3, the other 15 more than the end wall 4 , for the injection of a stirring gas such as argon, and these porous plugs 14 and 15 are inclined with an angular offset a relative to the bottom line F, so as to be flush with the outlet 8 of the withdrawal passage 7
  • a stirring gas such as argon
  • a burner 17 of the oxygen-fuel type, vertically adjustable, is mounted at a high point or arch of the cylindrical wall 2 of the enclosure 1 and it is located longitudinally closer to the end wall 4 than to the wall of end 3, substantially perpendicular to the passage 7, so as to provide preferential heating on the discharge side of the liquid metal and also increase the residence time of hot gas before exhaust via the chimney duct 5, which improves the transfer thermal towards the metallic mass. It is understood that, during the treatment, the metal introduced through the passage 5 flows along the arrow f (FIG. 1) longitudinally towards the outlet end 8, while being stirred by the neutral gas blown in by the porous plugs 14 and 15.
  • the enclosure 1 is tilted according to the arrow f ' to bring the withdrawal chute 7 in the low position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Furnace Details (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Charging Or Discharging (AREA)

Claims (8)

  1. Ofen zum Halten der Temperatur und zur metallurgischen Behandlung eines Metalls in flüssigem Zustand, umfassend einen Behälter (2) mit flüssigem Metall, der im oberen Teil mit einem Sauerstoff/Brennstoff- oder Luftsauerstoff/Brennstoff-Brenner (17) und im unteren Teil mit zumindest einem porösen Stopfen (14, 15) zum Einblasen eines neutralen Gases zum Durchmischen, sowie mit Öffnungsmitteln (5, 7) zum Zu- und/oder Abführen von Beschickungen versehen ist, dadurch gekennzeichnet, daß der Behälter als zylindrische, wärmegedämmte, geschlossene Umhüllung (1) ausgebildet ist, die um ihre Längsachse (X-Y) schwenkbar ist, die horizontal angeordnet ist und die ein Gewölbe sowie zwei Durchlässe mit vertikaler Komponente aufweist, deren einer (5) an einem Ende (3) der Umhüllung kaminförmig nahe des Gewölbes der Umhüllung (1) in die Umhüllung mündet und der Zufuhr flüssigen Metalls dient, und deren anderer (7) in der Umgebung eines gegenüberliegenden Endes (4) rutschenförmig im Innern (8) auf der Höhe des Bodens der Umhüllung mündet und deren Abfluß (9) in einer geschwenkten Lage der Umhüllung in eine Flüssigmetall-Entnahmestellung kommt, wobei der Brenner (17) in dem Gewölbe der Umhüllung in der Nähe des Entnahmedurchlasses (7) angeordnet ist.
  2. Ofen nach Anspruch 1, dadurch gekennzeichnet, daß er eine an höherer Stelle angeordnete seitliche Tür zur Sichtkontrolle (12) umfaßt.
  3. Ofen nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Brenner (17) im wesentlichen senkrecht zu dem Entnahmedurchlass (7) angeordnet ist.
  4. Ofen nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß er zumindest zwei poröse Stopfen (14-15) umfaßt, die zwischen den gegenüberliegenden Enden (3, 4) der Umhüllung angeordnet sind.
  5. Ofen nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß die Tür zur Sichtkontrolle (12) zwischen dem Brenner (17) und dem Zufuhrdurchlaß (5) angeordnet ist.
  6. Ofen nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß die porösen Stopfen in einer in Bezug auf die Vertikale geneigten Position in zur Tür zur Sichtkontrolle (12) entgegengesetzter Richtung angeordnet sind.
  7. Ofen nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß einer der porösen Stopfen (15) auf der Höhe der Mündung (8) des Entnahmedurchlasses (7) angeordnet ist.
  8. Ofen nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Verhältnis L/A zwischen 1,3 und 1,9 liegt, wobei L die Länge der zylindrischen Kammer des Ofens und A deren Durchmesser ist.
EP91401742A 1990-07-13 1991-06-27 Ofen zum Halten der Temperatur und zur metallurgischen Behandlung Expired - Lifetime EP0468832B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9008959A FR2664516B1 (fr) 1990-07-13 1990-07-13 Four de maintien en temperature et de traitement metallurgique.
FR9008959 1990-07-13

Publications (2)

Publication Number Publication Date
EP0468832A1 EP0468832A1 (de) 1992-01-29
EP0468832B1 true EP0468832B1 (de) 1996-01-03

Family

ID=9398696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91401742A Expired - Lifetime EP0468832B1 (de) 1990-07-13 1991-06-27 Ofen zum Halten der Temperatur und zur metallurgischen Behandlung

Country Status (9)

Country Link
US (1) US5160477A (de)
EP (1) EP0468832B1 (de)
JP (1) JPH0599570A (de)
AU (1) AU643537B2 (de)
CA (1) CA2046777A1 (de)
DE (1) DE69116020T2 (de)
ES (1) ES2080921T3 (de)
FR (1) FR2664516B1 (de)
ZA (1) ZA915336B (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007001098A1 (de) * 2007-01-04 2008-07-10 Sms Demag Ag Verfahren und Anlage zur Erzeugung von Stahl
WO2008111439A1 (ja) * 2007-03-06 2008-09-18 Hoya Corporation 光学ガラス、プレス成形用プリフォーム、光学素子およびそれらの製造方法
ES2387147B1 (es) * 2012-07-25 2013-05-16 La Farga Lacambra Sa Instalación para la fundición de una colada de metal de cobre o similar
CN105983667B (zh) * 2015-01-29 2020-04-21 边仁杰 轮带炉模
CN111485104B (zh) * 2020-05-18 2022-01-28 攀钢集团钒钛资源股份有限公司 用于电铝热法冶炼钒铁的倾翻炉

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB113834A (en) * 1917-03-08 1918-03-08 Joseph Hammond Beckett Improvements in and connected with the Refining of Metals.
FR1042052A (fr) * 1951-09-08 1953-10-28 Levivier Ets Récipient pour métal liquide
US3525506A (en) * 1968-09-05 1970-08-25 Jones & Laughlin Steel Corp Tundish-tundish roof assembly
US4004793A (en) * 1975-03-31 1977-01-25 Leotromelt Corporation Dual holding furnace
AT370135B (de) * 1977-09-29 1983-03-10 Voest Alpine Ag Grossraum-roheisenmischer
DE2837160A1 (de) * 1978-08-25 1980-03-06 Norddeutsche Affinerie Raffinationsofen fuer ne-metalle
JPS6169912A (ja) * 1984-09-14 1986-04-10 Kurosaki Refract Co Ltd 粉体吹込装置を有する混銑車
GB8516143D0 (en) * 1985-06-26 1985-07-31 British Steel Corp Melting of metals
DE3530043A1 (de) * 1985-08-22 1987-02-26 Linde Ag Verfahren und vorrichtung zum warmhalten einer schmelze in einer pfanne

Also Published As

Publication number Publication date
DE69116020T2 (de) 1996-05-15
JPH0599570A (ja) 1993-04-20
US5160477A (en) 1992-11-03
AU8031591A (en) 1992-01-16
FR2664516B1 (fr) 1993-06-18
ES2080921T3 (es) 1996-02-16
ZA915336B (en) 1992-04-29
CA2046777A1 (fr) 1992-01-14
DE69116020D1 (de) 1996-02-15
FR2664516A1 (fr) 1992-01-17
AU643537B2 (en) 1993-11-18
EP0468832A1 (de) 1992-01-29

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