EP0234389B1 - Düse für Frischlanzen - Google Patents

Düse für Frischlanzen Download PDF

Info

Publication number
EP0234389B1
EP0234389B1 EP87101778A EP87101778A EP0234389B1 EP 0234389 B1 EP0234389 B1 EP 0234389B1 EP 87101778 A EP87101778 A EP 87101778A EP 87101778 A EP87101778 A EP 87101778A EP 0234389 B1 EP0234389 B1 EP 0234389B1
Authority
EP
European Patent Office
Prior art keywords
tuyere
sharp edge
straight wall
wall portion
lance
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
EP87101778A
Other languages
English (en)
French (fr)
Other versions
EP0234389A3 (en
EP0234389A2 (de
Inventor
André Bock
Romain Henrion
Jean Liesch
Carlo Heintz
Henri Klein
Jean-François Liesch
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.)
Arcelor Luxembourg SA
Original Assignee
Arbed SA
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 Arbed SA filed Critical Arbed SA
Priority to AT87101778T priority Critical patent/ATE76439T1/de
Publication of EP0234389A2 publication Critical patent/EP0234389A2/de
Publication of EP0234389A3 publication Critical patent/EP0234389A3/fr
Application granted granted Critical
Publication of EP0234389B1 publication Critical patent/EP0234389B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the present invention relates to a nozzle for a refining lance and in particular a nozzle for supplying post-combustion oxygen to the space situated above a metal bath in the process of refining.
  • refining lances which have, apart from the nozzles supplying the supersonic oxygen for refining, several auxiliary nozzles, inclined between 25 ° and 60 ° (see for example patents LU 78 906 and LU 83 814) relative to the vertical axis, delivering oxygen jets used for post-combustion. Since these oxygen jets are subsonic, the auxiliary nozzles are supplied by an independent oxygen circuit which allows flow regulation. It is also known (see patent LU 82846) to provide the conduits with the nozzles which guide the afterburner oxygen with means for increasing the degree of turbulance of the jet.
  • These means may consist of sheets placed in the conduits of the secondary nozzles so as to form spirals; in another embodiment, the walls of the conduits are provided with grooves which can either be circular and be arranged in a plane perpendicular to the axis of the conduit, or spiral.
  • the object of the present invention is to propose a nozzle which avoids the disadvantages set out above and which makes it possible to send a jet of oxygen into a converter at variable inclination without using a delicate mechanical system.
  • a valve 8 controls the flow of oxygen.
  • This valve which has been designed for reasons of convenience close to the mouth 3, is normally located near the supports of the lance body.
  • a valve-to-mouth distance of ten meters also softens transient phenomena during the rapid deflection of the oxygen jet.
  • a pressure sensor 9 measures the actual pressure P at the inlet of the nozzle 11. This pressure P is compared (reference 14) to a set pressure Po and in the event of a difference a regulator 10 acts on the degree of opening of the valve 8.
  • a regulation loop it is also possible, by means of simple tests, to determine the range in which the degree of opening of the valve 8 must vary.
  • the oxygen jet has a pressure upstream of the nozzle 11 such that the speed of the gas is sonic when passing a fictitious plane 12 passing through the top of the edge 16 and normal to the mantle 4 guiding the gas (theoretically normal to the gas velocity vector). It is at the height of the summit of this pointed edge that the jet relaxes while being the seat of a multitude of shock waves which are at the base of an increase in speed of the jet and its deflection.
  • the deflection angle A varies as a function of the gas pressure at the edge 16, i.e.
  • the invention has been explained using elongated mouthpieces normally arranged at the axis of the lance.
  • the edge 16 instead of being arranged so as to cause an upward deflection of the jet, may, after adequate modification of the oxygen supply conduits, be arranged so as to cause a deflection of the jet down.

Claims (9)

  1. Düse (11) für eine Frischlanze (1), insbesondere Düse für die Zufuhr von Nachverbrennungssauerstoff in den Raum oberhalb dem der Frischbehandlung unterzogenen metallischen Bad, wobei die Düse (11) sich in der Verlängerung einer Zufuhrleitung (5) für das Gas befindet und mit einem Ventil (8) für die Regelung des Druckes ausgerüstet ist, dadurch gekennzeichnet, dass sie einen justierten Wandabschnitt aufweist entlang welchem das Gas geradlinig abfliesst und an eine vorzugsweise scharfe Kante (16) gelangt, welche einen Teil der Mündung (3) bildet, und dass sie einen gebogenen Wandabschnitt (7) besitzt welcher den im wesentlichen in der Verlängerung des besagten justierten Wandabschnittes liegenden verbleibenden Teil der Mündung (3) mit der Leitung (5) verbindet.
  2. Düse gemäss Anspruch 1, dadurch gekennzeichnet, dass die gekrümmte Wand (7) einen konvergierenden Abschnitt bildet.
  3. Düse gemäss Anspruch 1, dadurch gekennzeichnet, dass die gekrümmte Wand (7) oberhalb der Kante (16) einen konvergierenden Abschnitt bildet und unterhalb derselben einen divergierenden Abschnitt.
  4. Düse gemäss Anspruch 3, dadurch gekennzeichnet, dass die gekrümmte Wand (7) einen unmittelbar oberhalb der Kante (16) gelegenen Hals bildet.
  5. Düse gemäss einem der Ansprüche 1 - 4, dadurch gekennzeichnet, dass die besagte Kante (16) geradlinig ist.
  6. Düse gemäss Anspruch 5, dadurch gekennzeichnet, dass die Mündung (3) die Form eines flachen Rechteckes nachahmt, wobei eine der langen Seiten des Rechteckes die besagte Kante (16) darstellt.
  7. Düse gemäss Anspruch 6, dadurch gekennzeichnet, dass das Rechteck eine Höhe in der Grössenordnung von einem cm hat.
  8. Düse gemäss Anspruch 5, dadurch gekennzeichnet, dass die durch die besagte Kante (16) gehende Ebene senkrecht zu der Achse der Lanze (1) steht.
  9. Düse gemäss Anspruch 1, dadurch gekennzeichnet dass der justierte Wandabschnitt von einem Teil der inneren Fläche des äusseren, im wesentlichen eine zylindrische Form aufweisenden Mantels (4) der Lanze (1) gebildet ist.
EP87101778A 1986-02-28 1987-02-09 Düse für Frischlanzen Expired - Lifetime EP0234389B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87101778T ATE76439T1 (de) 1986-02-28 1987-02-09 Duese fuer frischlanzen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU86329A LU86329A1 (fr) 1986-02-28 1986-02-28 Tuyere pour lance d'affinage
LU86329 1986-02-28

Publications (3)

Publication Number Publication Date
EP0234389A2 EP0234389A2 (de) 1987-09-02
EP0234389A3 EP0234389A3 (en) 1989-03-15
EP0234389B1 true EP0234389B1 (de) 1992-05-20

Family

ID=19730648

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87101778A Expired - Lifetime EP0234389B1 (de) 1986-02-28 1987-02-09 Düse für Frischlanzen

Country Status (10)

Country Link
US (1) US4730814A (de)
EP (1) EP0234389B1 (de)
JP (1) JPS62228427A (de)
AT (1) ATE76439T1 (de)
AU (1) AU581361B2 (de)
BR (1) BR8700873A (de)
CA (1) CA1323757C (de)
DE (1) DE3779143D1 (de)
ES (1) ES2031080T3 (de)
LU (1) LU86329A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU87156A1 (fr) * 1988-03-11 1989-10-26 Arbed Tuyere pour lance d'affinage
LU87354A1 (fr) * 1988-09-28 1990-04-06 Arbed Lance d'affinage

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1064970B (de) * 1955-01-05 1959-09-10 Hoerder Huettenunion Ag Verfahren zum Oberwindfrischen von phosphorhaltigem Roheisen
US3015481A (en) * 1959-12-11 1962-01-02 Archie H Clingensmith Tuyere assembly
DE1433514A1 (de) * 1964-01-09 1969-04-03 Hoerder Huettenunion Ag Vorrichtung zum Blasen von Gasen auf oder in eine Metallschmelze
US3627294A (en) * 1970-03-25 1971-12-14 Atlantic Richfield Co Protection sleeve for dip tubes
US3697058A (en) * 1971-02-02 1972-10-10 G Sojuzny I Proektirovanijuagr Oxygen toyere of a steel-melting mill
LU78906A1 (fr) * 1978-01-19 1979-09-06 Arbed Procede et dispositif pour l'affinage d'un bain de metal
LU82846A1 (fr) * 1980-10-13 1982-05-10 Arbed Lance de soufflage d'oxygene
LU83814A1 (fr) * 1981-12-04 1983-09-01 Arbed Procede et dispositif pour l'affinage d'un bain de metal contenant des matieres refroidissantes solides
FR2521167B1 (fr) * 1982-02-10 1987-04-30 Siderurgie Fse Inst Rech Lance d'injection de gaz pour convertisseur metallurgique
DE3231867A1 (de) * 1982-08-27 1984-03-01 Saar-Metallwerke GmbH, 6600 Saarbrücken Zweikreislanze zum frischen von metallschmelzen
US4434005A (en) * 1982-09-24 1984-02-28 Arbed S. A. (Luxembourg) Method of and apparatus for refining a melt containing solid cooling material

Also Published As

Publication number Publication date
JPS62228427A (ja) 1987-10-07
EP0234389A3 (en) 1989-03-15
CA1323757C (fr) 1993-11-02
AU6953987A (en) 1987-09-03
ES2031080T3 (es) 1992-12-01
US4730814A (en) 1988-03-15
EP0234389A2 (de) 1987-09-02
AU581361B2 (en) 1989-02-16
ATE76439T1 (de) 1992-06-15
LU86329A1 (fr) 1987-09-10
BR8700873A (pt) 1987-12-29
DE3779143D1 (de) 1992-06-25

Similar Documents

Publication Publication Date Title
EP0235621B1 (de) Sauerstoff-Blaslanze
EP0866140B1 (de) Verfahren zum Bilden eines kohärenten Gasstrahls
EP0234389B1 (de) Düse für Frischlanzen
FR2724217A1 (fr) Dispositif d'etalement d'une flamme par effet coanda et four comportant ce dispositif
EP0615482A1 (de) Verfahren zum zufuhr von gas zum laserstrahlschneiden und vorrichtung zur durchfuehrung dieses verfahrens
FR2567649A1 (fr) Installation pour le controle ultrasonore de pieces en immersion locale, et buse, notamment pour cette installation
EP0028998A1 (de) Verfahren zur Aufbereitung von Schlacke Während des Affinierens eines Metallbades
FR2740862A1 (fr) Dispositif pour aspirer un fluide gazeux a travers un conduit pour le rejeter a l'exterieur de celui-ci
CA1323756C (fr) Lance de soufflage d'oxygene
EP0364721B1 (de) Lanze zum Blasfrischen
EP0364722B1 (de) Sauertoff-Blaslanze
EP0336109B1 (de) Düse für Frischlanzen
EP0046721B1 (de) Einblasdüse für Sauerstofflanzen zum Entkohlen von Roheisen, insbesondere chromhaltigen Roheisens
EP0318352A1 (de) Kohlendioxidlanze für metallurgische Verfahren
CA1278679C (fr) Dispositif d'adaptation pour tuyere d'acceleration de particules solides
FR2481782A1 (fr) Ajutage de pulverisation de liquides, notamment pour pulveriser des effluents liquides destines a etre brules
FR2637296A1 (fr) Procede et installation pour le conditionnement du flux des fumees d'un cubilot
EP0970325B1 (de) Vormischbrenner mit einer durchflussmenge von mehr als 1000 liter/stunde
FR2607024A1 (fr) Dispositif pour melanger deux gaz
LU87856A1 (fr) Lance de soufflage
FR2583652A1 (fr) Perfectionnement aux tours de refroidissement des gaz charges de poussieres
BE837112A (fr) Dispositif d'echappement d'une turbine a gaz vers deux sorties distinctes
BE367992A (de)
FR2728329A1 (fr) Bruleur pour foyer industriel, notamment pour foyer de four rotatif a ambiance dite froide et turbulente
BE625135A (de)

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

Kind code of ref document: A2

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

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

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

17P Request for examination filed

Effective date: 19890414

D17P Request for examination filed (deleted)
R17P Request for examination filed (corrected)

Effective date: 19890414

17Q First examination report despatched

Effective date: 19910514

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 ES FR GB IT NL SE

REF Corresponds to:

Ref document number: 76439

Country of ref document: AT

Date of ref document: 19920615

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3779143

Country of ref document: DE

Date of ref document: 19920625

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2031080

Country of ref document: ES

Kind code of ref document: T3

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

Ref country code: FR

Payment date: 19940114

Year of fee payment: 8

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

Ref country code: DE

Payment date: 19940118

Year of fee payment: 8

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

Ref country code: BE

Payment date: 19940131

Year of fee payment: 8

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

Ref country code: GB

Payment date: 19940201

Year of fee payment: 8

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

Ref country code: AT

Payment date: 19940214

Year of fee payment: 8

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

Ref country code: SE

Payment date: 19940216

Year of fee payment: 8

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

Ref country code: NL

Payment date: 19940228

Year of fee payment: 8

Ref country code: ES

Payment date: 19940228

Year of fee payment: 8

EAL Se: european patent in force in sweden

Ref document number: 87101778.6

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

Ref country code: GB

Effective date: 19950209

Ref country code: AT

Effective date: 19950209

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

Ref country code: SE

Effective date: 19950210

Ref country code: ES

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

Effective date: 19950210

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

Ref country code: BE

Effective date: 19950228

BERE Be: lapsed

Owner name: S.A. ARBED

Effective date: 19950228

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

Ref country code: NL

Effective date: 19950901

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950209

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

Ref country code: FR

Effective date: 19951031

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19950901

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

Ref country code: DE

Effective date: 19951101

EUG Se: european patent has lapsed

Ref document number: 87101778.6

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19990201

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050209