EP0055956B1 - Lance de soufflage de gaz oxydant, notamment d'oxygène, pour le traitement des métaux en fusion - Google Patents

Lance de soufflage de gaz oxydant, notamment d'oxygène, pour le traitement des métaux en fusion Download PDF

Info

Publication number
EP0055956B1
EP0055956B1 EP81402009A EP81402009A EP0055956B1 EP 0055956 B1 EP0055956 B1 EP 0055956B1 EP 81402009 A EP81402009 A EP 81402009A EP 81402009 A EP81402009 A EP 81402009A EP 0055956 B1 EP0055956 B1 EP 0055956B1
Authority
EP
European Patent Office
Prior art keywords
lance
blowing
bath
gas
opening
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
Application number
EP81402009A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0055956A1 (fr
Inventor
Bernard Schaffar
Hugues Zanetta
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.)
Institut de Recherches de la Siderurgie Francaise IRSID
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
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 Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Priority to AT81402009T priority Critical patent/ATE28759T1/de
Publication of EP0055956A1 publication Critical patent/EP0055956A1/fr
Application granted granted Critical
Publication of EP0055956B1 publication Critical patent/EP0055956B1/fr
Expired legal-status Critical Current

Links

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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • 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

Definitions

  • the present invention relates to a lance for blowing oxidizing gas, in particular oxygen, intended to be placed above a bath of molten metal in a crucible for metallurgical treatment, in particular above a cast iron bath for refining it into steel.
  • oxidizing gas in particular oxygen
  • the invention relates to lances the nose of which comprises, in addition to the usual main openings opening onto the front face of the nozzle and serving for blowing oxygen in the form of jets with strong impulse for refining properly said (oxidation of the impurities in the metal bath), additional (or secondary) openings for blowing a stream of oxygen at low speed intended to improve the secondary combustion rate of the refining gases.
  • a lance of this type is described in document LU-A-78 906.
  • the "nose” of the lance constitutes the end through which the refining oxygen exits towards the bath.
  • the "nose” is a hollow piece of copper, attached to the end of the lance body.
  • front face is understood to mean the part of the nose turned opposite the metal bath contained in the crucible.
  • the secondary combustion rate reflects the proportion of C0 2 in the reaction gases, this C0 2 being obtained by oxidation of the CO which is released from the metal bath following decarburization of the latter by oxygen d refining.
  • Multipurpose lances of this type already exist. However, progress is still possible, both in terms of increasing the secondary combustion of the reaction gases and the durability of the lance noses. These are the aims of the present invention.
  • the subject of the invention is a blowing lance for oxidant, in particular oxygen, for the treatment of molten metals, in particular for refining a steel bath, and comprising a lance nose provided with two categories openings: at least one main opening for blowing gas jets with strong impulse and outlet on the central region of the front face of the lance nose, and at least one additional opening for blowing gas streams with significantly weaker impulse, profile diverge in the direction of blowing and also opening onto said front face, characterized in that the main opening and the adjoining opening communicate with the hollow central part of the lance body serving for the circulation of the oxidizing agent, while the appendix opening is constituted by several slots arranged along a ring formed by two circles concentric with the circle defining the periphery of the lance nose with their largest dimension according to the ring, and in that the configuration of annular assembly constituted by the slots surrounds at a distance, counted edge to edge, between 2 and 20 cm approximately, the main opening or the group formed by the main opening
  • the secondary openings are not in the form of circular orifices, but on the contrary in the form of more or less elongated slots, arranged annularly around the main openings, one after the other.
  • the gas flows against the lance nose are favorably modified, so that the phenomena of wear by recirculation of the hot gases are considerably reduced.
  • the gas recirculation around the main jets is certainly higher award-winning, but the oxygen currents at the outlet of the slots are accelerated by the driving effect of the main jets, so that, ultimately, this amounts to displacing the problem of wear around the secondary slots .
  • this acceleration is opposed to the lateral diffusion of the secondary currents, so that, in the best of cases, the formation of a homogeneous conical sheet of oxygen above the bath is delayed and the secondary combustion reduced .
  • the slits are placed too far, that is to say more than 20 cm approximately, they have practically no more influence on the aerodynamics in the vicinity of the main jets of oxygen.
  • the secondary slits should not however be placed on the lateral flank of the nose because otherwise, the desired effect is not obtained.
  • FIGS. 1 and 2 schematically represent a lance nose according to the invention seen from below, that is to say seen of the metal bath to be treated
  • FIG. 3 is a view in vertical section along the axial plane AA of FIG. 2.
  • the front face of the lance nose 2 This face, of substantially planar shape, has in its central part three main orifices 3 for blowing jets of oxygen with strong impulse (refining oxygen ).
  • openings are provided for the outlet of the oxygen pulse streams, intended to form a conical sheet continuous surrounding the main jets and covering the surface of the metal bath to be refined.
  • these additional openings can have numerous design variants, going from a configuration in small multiple slots 6 (FIG. 2) practically rectilinear, passing through configurations with slots in a more or less elongated arc, such as 5 ( Figure 1).
  • the gaseous screen of conical shape sought can be produced from a succession of spaced apart slots ( Figures 1 and 2).
  • the advantage of this embodiment is to be able to provide between the slots, small bridges 7 which facilitate, technologically, the arrangement of a cooling water circuit inside the lance nose.
  • the short sides of the slots have been chamfered. These chamfers are clearly visible at 18 in FIG. 2.
  • Figure 3 shows the lance nose 2 in vertical section as mounted at the lower end of the lance body, which is constituted in the usual way by three concentric tubes 8, 9 and 10.
  • the nose 2 is a hollow piece of copper, molded so as to provide central passages 11 which open on the front face 1 through the openings 3 already mentioned. This part is then drilled by machining and copper barrels 12 are placed in the holes thus produced.
  • These guns have a passage section 13 of oblong shape in the direction perpendicular to the plane of the figure and open on the front face 1 through the slots 6.
  • An internal partition 14 which can be attached or molded from the original with the nose, divides the interior volume of the nose into two compartments, interior 15 and exterior 16, communicating with each other by annular passages 17 formed around the main passages 11. In this way, a sealed cooling water circuit is created inside the nose which effectively irrigates the entire front face 1.
  • the water circulation is indicated by arrows.
  • the invention is of general application to any treatment with oxygen of fuel metal baths contained in a metallurgical container.
  • it is applied in conjunction with an operation for stirring the bath obtained by blowing in stirring gas (neutral or possibly oxidizing gas) through nozzles or air-tight refractory elements incorporated into the wall of the container, at a lower level. to that of the bath, and more generally, in the bottom of the container.
  • stirring gas neutral or possibly oxidizing gas

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Endoscopes (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Furnace Details (AREA)
EP81402009A 1980-12-22 1981-12-16 Lance de soufflage de gaz oxydant, notamment d'oxygène, pour le traitement des métaux en fusion Expired EP0055956B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81402009T ATE28759T1 (de) 1980-12-22 1981-12-16 Lanze zum einblasen eines oxydierenden gases, speziell von sauerstoff, zur behandlung von metallschmelzen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8027410A FR2496699B1 (fr) 1980-12-22 1980-12-22 Lance de soufflage de gaz oxydant, notamment d'oxygene, pour le traitement des metaux en fusion
FR8027410 1980-12-22

Publications (2)

Publication Number Publication Date
EP0055956A1 EP0055956A1 (fr) 1982-07-14
EP0055956B1 true EP0055956B1 (fr) 1987-08-05

Family

ID=9249453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81402009A Expired EP0055956B1 (fr) 1980-12-22 1981-12-16 Lance de soufflage de gaz oxydant, notamment d'oxygène, pour le traitement des métaux en fusion

Country Status (12)

Country Link
US (1) US4396182A (es)
EP (1) EP0055956B1 (es)
JP (1) JPS57131313A (es)
AT (1) ATE28759T1 (es)
AU (1) AU541840B2 (es)
BR (1) BR8108301A (es)
CA (1) CA1178052A (es)
DE (2) DE3176342D1 (es)
ES (1) ES8302791A1 (es)
FR (1) FR2496699B1 (es)
PT (1) PT74151B (es)
ZA (1) ZA818828B (es)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521167B1 (fr) * 1982-02-10 1987-04-30 Siderurgie Fse Inst Rech Lance d'injection de gaz pour convertisseur metallurgique
DE3509795C1 (de) * 1985-03-19 1986-06-05 Klöckner CRA Technologie GmbH, 4100 Duisburg Wassergekuehlte Blaslanze zum Aufblasen von Sauerstoff auf eine Metallschmelze
GB8514587D0 (en) * 1985-06-10 1985-07-10 Britannia Refined Metals Ltd Recovery of metals from their alloys with lead
US5324816A (en) * 1987-06-22 1994-06-28 Allied-Signal Inc. Process for improving the properties of polymers
LU87354A1 (fr) * 1988-09-28 1990-04-06 Arbed Lance d'affinage
GB2230848B (en) * 1989-04-26 1993-01-13 Insul Co Inc Lance for use in treating a bath of molten metal
CA2066455C (en) * 1989-09-29 1995-12-19 John Millace Floyd Top submerged injection with a shrouded lance
FR2667928B1 (fr) * 1990-10-16 1995-07-28 Air Liquide Procede de chauffe d'une enceinte thermique.
LU87857A1 (fr) * 1990-12-10 1992-08-25 Arbed Procede de regulation de l'operation d'affinage de fonte
LU87856A1 (fr) * 1990-12-10 1992-08-25 Arbed Lance de soufflage
US5209656A (en) * 1991-08-29 1993-05-11 Praxair Technology, Inc. Combustion system for high velocity gas injection
IN181041B (es) * 1991-09-20 1998-04-18 Ausmelt Ltd
AU647669B2 (en) * 1991-09-20 1994-03-24 Ausmelt Pty Ltd Top submergable lance
DE4320572C1 (de) * 1993-06-15 1995-01-26 Mannesmann Ag Verfahren und Vorrichtung zur Schmelzreduktion von Erzen oder vorreduzierten Metallträgern
US6017380A (en) * 1995-01-06 2000-01-25 Nippon Steel Corporation Top-blown refining method in converter featuring excellent decarburization and top-blown lance for converter
US5681526A (en) * 1996-04-23 1997-10-28 Usx Corporation Method and apparatus for post-combustion of gases during the refining of molten metal
US6217824B1 (en) 1999-05-20 2001-04-17 Berry Metal Company Combined forged and cast lance tip assembly
DE602005015575D1 (de) * 2004-05-14 2009-09-03 Linde Inc Feinen von schmelzflüssigem metall
AT506984B1 (de) * 2008-06-17 2010-06-15 Siemens Vai Metals Tech Gmbh Sauerstoffblaslanze mit schutzelement
AU2012276276B2 (en) 2011-06-30 2015-01-22 Metso Metals Oy Top submerged injecting lances
ES2621331T3 (es) 2011-09-02 2017-07-03 Outotec Oyj Lanzas para inyección sumergida superior
MX2014006334A (es) 2011-11-30 2014-06-23 Outotec Oyj Lanzas refrigeradas para fluido para inyeccion sumergida por la parte superior.
AU2013204818B2 (en) 2013-04-12 2015-02-19 Metso Metals Oy Molten bath temperature measurement for a top submerged lance injection installation
KR101700078B1 (ko) 2013-10-16 2017-01-26 오토텍 (핀랜드) 오와이 향상된 침지식 연소를 위한 상부 침지식 주입 랜스
WO2015056142A1 (en) 2013-10-16 2015-04-23 Outotec (Finland) Oy Top submerged injection lance for enhanced heat transfer
JOP20210193A1 (ar) 2019-01-18 2023-01-30 Astrazeneca Ab مثبطات pcsk9 وطرق استخدامها
CN114196798B (zh) * 2021-11-23 2023-03-28 武汉钢铁有限公司 单流道二次燃烧氧枪及其使用方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE845643C (de) * 1949-09-21 1952-08-04 Oesterr Alpine Montan Vorrichtung und Verfahren zum Blasen von Gasen gegen die Oberflaeche von Metallschmelzen
FR1424029A (fr) * 1964-01-06 1966-01-07 Union Carbide Corp Procédé et appareil pour introduire un courant de gaz de traitement dans un bain de métal en fusion
US3411716A (en) * 1966-05-11 1968-11-19 United States Steel Corp Oxygen lance for steelmaking furnaces
US3519259A (en) * 1968-05-06 1970-07-07 Union Carbide Corp Furnace jet devices
LU56138A1 (es) * 1968-05-24 1970-01-14
BE756083A (fr) * 1969-09-11 1971-03-15 Enya Ryosuke Procede et dispositif pour la fabrication de metal en fusion destine a etre coule
US3642060A (en) * 1970-03-16 1972-02-15 Bethlehem Steel Corp Water-cooled apparatus
FR2124088A1 (en) * 1971-02-04 1972-09-22 G Sojuzny Steel refining oxygen lance - with helical screening gas nozzles
US3889933A (en) * 1974-02-28 1975-06-17 Int Nickel Canada Metallurgical lance
LU78906A1 (fr) * 1978-01-19 1979-09-06 Arbed Procede et dispositif pour l'affinage d'un bain de metal
US4230274A (en) * 1978-07-10 1980-10-28 Pullman Berry Company Lance for removing skulls from steelmaking vessels
US4301969A (en) * 1980-02-25 1981-11-24 Sharp Kenneth C Oxygen lance nozzle

Also Published As

Publication number Publication date
AU7877681A (en) 1982-07-01
PT74151A (fr) 1982-01-01
ZA818828B (en) 1982-11-24
PT74151B (fr) 1983-06-28
JPS57131313A (en) 1982-08-14
ES508277A0 (es) 1982-12-01
DE55956T1 (de) 1983-01-20
FR2496699A1 (fr) 1982-06-25
ES8302791A1 (es) 1982-12-01
DE3176342D1 (en) 1987-09-10
US4396182A (en) 1983-08-02
BR8108301A (pt) 1982-07-06
FR2496699B1 (fr) 1985-06-21
ATE28759T1 (de) 1987-08-15
AU541840B2 (en) 1985-01-24
EP0055956A1 (fr) 1982-07-14
CA1178052A (fr) 1984-11-20

Similar Documents

Publication Publication Date Title
EP0055956B1 (fr) Lance de soufflage de gaz oxydant, notamment d'oxygène, pour le traitement des métaux en fusion
JP2009136923A (ja) 連続鋳造用タンディッシュ衝撃パッド
FR2564011A1 (fr) Panier de coulee continue dote de fonctions de reacteur pour les traitements realises en dehors du four
FR2502997A1 (fr) Procede de fabrication d'acier de decolletage au plomb par coulee continue
EP1332235B1 (fr) Dispositif rotatif de dispersion de gaz pour le traitement d'un bain de metal liquide
FR2472613A1 (fr) Procede et appareil de separation de laitier et de coulee d'acier
EP0916066B1 (fr) Dispositif rotatif de dispersion de gaz pour le traitement d'un bain d'aluminium liquide
EP0032350B1 (fr) Procédé d'affinage d'un bain de métal dans un creuset à soufflage d'oxygène par le haut et creuset de mise en oeuvre
FR2642679A3 (fr) Dispositif d'elimination des inclusions non metalliques dans un repartiteur de coulee continue de l'acier
TW201021943A (en) Immersion nozzle
LU84213A1 (fr) Dispositif pour vidanger des recipients metallurgiques
FR2772653A1 (fr) Reacteur metallurgique, de traitement sous pression reduite d'un metal liquide
FR2728491A1 (fr) Dispositif de coulee d'un metal liquide avec injection d'un gaz inerte dans le metal liquide en cours de coulee
EP0166646A1 (fr) Installation pour l'élaboration de l'acier par préaffinage de la fonte
FR2604107A1 (fr) Dispositif rotatif de mise en solution d'elements d'alliage et de dispersion de gaz dans un bain d'aluminium
EP0282824A2 (fr) Dispositif pour vidanger des récipients métallurgiques
FR2618216A1 (fr) Dispositif pour fondre des metaux dans une chambre a vide par bombardement electronique, notamment en vue de leur purification.
BE1009438A4 (fr) Procede de traitement de l'acier et installation a cet effet.
EP0382701A1 (fr) Dispositif pour empêcher l'entraînement de scorie
LU85363A1 (fr) Dispositif d'adaptation pour tuyere d'acceleration de particules solides
EP0223722A1 (fr) Dispositif et procédé d'injection continue sous faible pression d'un additif pulvérulent dans un courant de métal fondu
FR2727432A1 (fr) Dispositif de degazage et de separation des inclusions dans un bain de metal liquide
FR2576534A1 (fr) Paroi de la chambre pour convertisseur, en particulier pour le traitement de la fonte liquide au moyen de magnesium
FR2488380A1 (fr) Procede de melange des gaz chauds d'un four avec un autre gaz avant l'evacuation de ces gaz, et hotte destinee a la mise en oeuvre de ce procede
EP0030910A1 (fr) Busettes plongeantes utilisées en coulée continue électrorotative de métaux

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE DE GB IT LU NL SE

ITCL It: translation for ep claims filed

Representative=s name: BARZANO' E ZANARDO MILANO S.P.A.

TCNL Nl: translation of patent claims filed
TCAT At: translation of patent claims filed
DET De: translation of patent claims
17P Request for examination filed

Effective date: 19830110

17Q First examination report despatched

Effective date: 19860421

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE GB IT LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19870805

REF Corresponds to:

Ref document number: 28759

Country of ref document: AT

Date of ref document: 19870815

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19870831

REF Corresponds to:

Ref document number: 3176342

Country of ref document: DE

Date of ref document: 19870910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19871231

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881121

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19881231

BERE Be: lapsed

Owner name: INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE

Effective date: 19881231

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19901029

Year of fee payment: 10

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19911230

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920901

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19921216