EP0261365A1 - Lance immergée - Google Patents

Lance immergée Download PDF

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Publication number
EP0261365A1
EP0261365A1 EP87111378A EP87111378A EP0261365A1 EP 0261365 A1 EP0261365 A1 EP 0261365A1 EP 87111378 A EP87111378 A EP 87111378A EP 87111378 A EP87111378 A EP 87111378A EP 0261365 A1 EP0261365 A1 EP 0261365A1
Authority
EP
European Patent Office
Prior art keywords
inner tube
lance according
diving
gases
fin
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.)
Granted
Application number
EP87111378A
Other languages
German (de)
English (en)
Other versions
EP0261365B1 (fr
Inventor
Erich Struzik
Hans Dieter Hofmann
Dirk Stein
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.)
Plibrico Co GmbH
Original Assignee
Plibrico Co GmbH
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
Priority claimed from DE19868622299 external-priority patent/DE8622299U1/de
Application filed by Plibrico Co GmbH filed Critical Plibrico Co GmbH
Priority to AT87111378T priority Critical patent/ATE52279T1/de
Publication of EP0261365A1 publication Critical patent/EP0261365A1/fr
Application granted granted Critical
Publication of EP0261365B1 publication Critical patent/EP0261365B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C21C5/4613—Refractory coated lances; Immersion lances
    • 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
    • C21C1/08—Manufacture of cast-iron

Definitions

  • the invention relates to a submersible lance for introducing treatment media, such as gases, in particular inert gases and / or carrier gases, with which solids, such as slag-forming substances, carbon or the like, are transported into a container filled with metal, in particular for the treatment of pig iron or steel.
  • treatment media such as gases, in particular inert gases and / or carrier gases
  • solids such as slag-forming substances, carbon or the like
  • the immersion lance consists of a metal inner tube for the supply of the medium and a refractory monolithic ceramic jacket, which is held by means of a reinforcement attached to the inner tube, and one or more outlet openings penetrating the jacket.
  • Immersion lances of this type are known in various forms and are used for mixing steel melts, for degassing or desulfurization. To do this, the lances must be designed so that they can withstand considerable stress resist, which occur during the blowing process due to the temperature as well as the temperature change, due to the erosive attack by the metal and the slag, due to chemical processes and mechanical stress due to the static and dynamic-mechanical forces in the form of buoyancy and vibrations.
  • the invention has for its object to provide a submersible lance, the heat-dissipating surface is increased by a substantial amount, whereby the thermal stress on the refractory material is significantly lower and thereby a longer service life.
  • the moment of resistance of the entire lance should be increased significantly and the effect of damaging vibrations on the lance should be avoided.
  • the reinforcement surrounding the inner tube is formed at least from a spirally wound ribbed belt, which forms rib parts at uniform intervals and is connected to the inner tube.
  • the rib parts are preferably at right angles to the longitudinal axis of the inner tube, so that the greatest possible stability is ensured.
  • the same purpose serves the adjustment of the distances between adjacent fin windings to 1/6 to 3/6 of the inner diameter of the inner tube.
  • the ribbed belt advantageously extends over almost the entire length of the inner tube covered by the sheathing, in order to optimize the heat dissipation.
  • the invention is applicable to all submersible lances with any design, position and arrangement of the outlet openings.
  • An advantageous embodiment results, however, if the lower end of the inner tube is closed with a thin sheet metal disk, which is followed by an outlet tube, the diameter of which is smaller than the diameter of the inner tube.
  • the lower end of the outlet pipe should end in front of the lowest point of the casing. In the lowest area of the casing, a central head piece made of an easy-to-remove refractory material should continue to be inserted between the lowest point and the lower end of the outlet pipe.
  • the immersion lance 1 consists of a metal inner tube 2 and a refractory ceramic monolithic casing 3.
  • the lower end of the inner tube 2 is closed with a thin sheet metal disc 4, to which an outlet tube 5 is connected.
  • an easily breakable head piece 8 made of refractory material is provided between the lower end 6 of the outlet pipe 5 and the lowermost point 7 of the casing 3.
  • the inner tube 2 is connected to the environment at the lower end 12 through one or more lateral channels 13 in the casing 3. Through this or this Channels 13 the gases possibly loaded with solids get out of the inner tube 2 with the immersion lance immersed in the metal melt. If one or more of the channels 13 is clogged with slag or metal residues, the head piece 8 is broken out and the sheet metal disk 4 is pierced. So that the inner tube 2 has an easy to create further mouth.
  • the inner tube 2 is surrounded by a spirally wound fin band 9, which is wound so that fin parts 10 are formed with uniform intervals 11 in the axial direction of the lance.
  • the rib parts 10 are, as the drawing shows, at right angles to the longitudinal axis of the inner tube 2 and are corrugated. This increases the heat-dissipating surface.
  • An increase in stability results from one or more rods 14 which on the outer circumference of the ribbed belt 9 parallel to the axis of the inner tube 2, for. B. are attached by welding or soldering.
  • a plurality of rods 14 can surround the rib belt 9 in a cage-like manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP87111378A 1986-08-20 1987-08-06 Lance immergée Expired - Lifetime EP0261365B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87111378T ATE52279T1 (de) 1986-08-20 1987-08-06 Tauchlanze.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8622299U 1986-08-20
DE19868622299 DE8622299U1 (de) 1986-08-20 1986-08-20 Tauchlanze
DE3719862 1987-06-13
DE3719862A DE3719862C2 (de) 1986-08-20 1987-06-13 Tauchlanze

Publications (2)

Publication Number Publication Date
EP0261365A1 true EP0261365A1 (fr) 1988-03-30
EP0261365B1 EP0261365B1 (fr) 1990-04-25

Family

ID=25856649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87111378A Expired - Lifetime EP0261365B1 (fr) 1986-08-20 1987-08-06 Lance immergée

Country Status (4)

Country Link
US (1) US4783060A (fr)
EP (1) EP0261365B1 (fr)
DE (2) DE3719862C2 (fr)
ES (1) ES2015560B3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0368266A1 (fr) * 1988-11-11 1990-05-16 Linde Aktiengesellschaft Procédé et installation d'une cubilot pour la production de fer de grande qualité

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29914990U1 (de) * 1999-08-27 2001-01-18 Plibrico GmbH, 40210 Düsseldorf Armierung für eine Ummantelung eines Metallrohrs
AUPR624801A0 (en) * 2001-07-10 2001-08-02 Technological Resources Pty Limited A gas injection lance

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3833209A (en) * 1973-04-04 1974-09-03 Berry Metal Co Apparatus for refining of steel
DE7613309U1 (de) * 1976-04-28 1976-09-02 Stahlwerke Peine-Salzgitter Ag, 3150 Peine Lanze zum einblasen fluidisierter stoffe in eine metallschmelze
DE2439700B2 (de) * 1973-08-22 1977-07-14 GR Stem Refractories Ltd, Shef field, Yorkshire (Großbritannien) Lanze zum einblasen fluidisierter stoffe in eine metallschmelze und verfahren zu ihrer herstellung
EP0091127A1 (fr) * 1982-04-06 1983-10-12 Energiagazdalkodasi Intezet Tubes aux ailettes helicoidaux
EP0106822A1 (fr) * 1982-10-15 1984-04-25 IFM Development AB Buse pour lance d'injection
DE3322556A1 (de) * 1983-06-23 1985-01-10 Didier-Werke Ag, 6200 Wiesbaden Lanze zum einblasen fluidisierter stoffe in eine metallschmelze
BE904670R (fr) * 1978-10-27 1986-08-18 Desaar Rene Nez de lance de desulfuration de fonte ou d'acier.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4827045B1 (fr) * 1970-06-23 1973-08-18
DE2626982C3 (de) * 1975-01-21 1985-04-04 GR-Stein Refractories Ltd., Sheffield, Yorkshire Lanze zum Einblasen fluidisierter Stoffe in eine Metallschmelze und Verfahren zur Herstellung der Lanze
BE879036A (fr) * 1979-09-27 1980-01-16 Desaar Rene Virole pour lance de soufflage ou d'injection
DE8312421U1 (de) * 1983-04-27 1983-09-15 Plibrico Co GmbH, 4000 Düsseldorf Tauchlanze
SU1206314A1 (ru) * 1984-05-30 1986-01-23 Научно-исследовательский институт металлургии Фурма дл глубинной продувки металла
DE3511772A1 (de) * 1985-03-30 1986-10-09 Didier-Werke Ag, 6200 Wiesbaden Blaslanze

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3833209A (en) * 1973-04-04 1974-09-03 Berry Metal Co Apparatus for refining of steel
DE2439700B2 (de) * 1973-08-22 1977-07-14 GR Stem Refractories Ltd, Shef field, Yorkshire (Großbritannien) Lanze zum einblasen fluidisierter stoffe in eine metallschmelze und verfahren zu ihrer herstellung
DE7613309U1 (de) * 1976-04-28 1976-09-02 Stahlwerke Peine-Salzgitter Ag, 3150 Peine Lanze zum einblasen fluidisierter stoffe in eine metallschmelze
BE904670R (fr) * 1978-10-27 1986-08-18 Desaar Rene Nez de lance de desulfuration de fonte ou d'acier.
EP0091127A1 (fr) * 1982-04-06 1983-10-12 Energiagazdalkodasi Intezet Tubes aux ailettes helicoidaux
EP0106822A1 (fr) * 1982-10-15 1984-04-25 IFM Development AB Buse pour lance d'injection
DE3322556A1 (de) * 1983-06-23 1985-01-10 Didier-Werke Ag, 6200 Wiesbaden Lanze zum einblasen fluidisierter stoffe in eine metallschmelze

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0368266A1 (fr) * 1988-11-11 1990-05-16 Linde Aktiengesellschaft Procédé et installation d'une cubilot pour la production de fer de grande qualité

Also Published As

Publication number Publication date
DE3719862A1 (de) 1988-02-25
EP0261365B1 (fr) 1990-04-25
DE3762429D1 (de) 1990-05-31
ES2015560B3 (es) 1990-09-01
US4783060A (en) 1988-11-08
DE3719862C2 (de) 1988-10-27

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