EP0510518A1 - Procédé pour la fabrication d'une tête d'injection refroidie à l'eau pour une lance de soufflage - Google Patents

Procédé pour la fabrication d'une tête d'injection refroidie à l'eau pour une lance de soufflage Download PDF

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Publication number
EP0510518A1
EP0510518A1 EP92106576A EP92106576A EP0510518A1 EP 0510518 A1 EP0510518 A1 EP 0510518A1 EP 92106576 A EP92106576 A EP 92106576A EP 92106576 A EP92106576 A EP 92106576A EP 0510518 A1 EP0510518 A1 EP 0510518A1
Authority
EP
European Patent Office
Prior art keywords
lance head
nozzle outlet
blow lance
head shell
outlet openings
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.)
Withdrawn
Application number
EP92106576A
Other languages
German (de)
English (en)
Inventor
Heinrich Dr. Hampel
Christian Dr. Oehler
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.)
Saar-Metallwerke GmbH
Saar Metallwerke GmbH
Original Assignee
Saar-Metallwerke GmbH
Saar Metallwerke 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
Application filed by Saar-Metallwerke GmbH, Saar Metallwerke GmbH filed Critical Saar-Metallwerke GmbH
Publication of EP0510518A1 publication Critical patent/EP0510518A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • C21C5/4646—Cooling arrangements

Definitions

  • the invention relates to a method for producing a cooled blow lance head with a blow lance head shell, in which nozzle outlet openings are provided for inflating or blowing gases onto or into a metal melt.
  • Lance heads of this type are used, for example, in steelworks which operate by the oxygen inflation process, preferably by the LD process.
  • the oxygen inflation process preferably by the LD process.
  • accompanying elements contained in the pig iron are removed with the help of oxygen by oxidation.
  • the oxygen is blown at a high speed of approx. 1.5 Mach onto the molten pig iron in a converter.
  • the pig iron is intensively mixed by the oxygen jets emerging from the lance head and the undesired components such as carbon, phosphorus, sulfur, silicon etc. are burned.
  • blow lance head The inside of the blow lance head is therefore exposed to oxygen pressures of up to 15 bar and the high flow velocities mentioned. This requires absolutely smooth and geometrically correct contours in this area.
  • the blow lance head On the outside, the blow lance head is exposed to radiant heat up to 2000 C and foamed slag, which contains Fe contents up to 20%.
  • the blow lance head is exposed to these requirements for up to 20 minutes during the process.
  • the lance head must therefore be cooled, e.g. by water cooling. With a precisely designed cooling system, blow lance durability of up to 1000 batches can be achieved.
  • the durability or service life of a blow lance head until the first leak in the water cooling system occurs is not the only criterion for assessing the blow lance head used. So that a blow lance head in view can work in the desired manner on the metallurgy of the steelmaking process, the required amount of oxygen must be brought into contact with the molten metal, for example the pig iron bath, as optimally as possible via the nozzle outlet openings. For this reason, each blow lance head is adapted to the specific operating conditions of each steel mill according to appropriate calculations.
  • the steelwork-specific data include converter content and dimensions, bath height, oxygen quantity and pressure as well as cooling water quantity and pressure.
  • a blow lance head can therefore be metallurgically unsuitable and therefore uneconomical for the steel industry, long before it has to be replaced as a result of leaks in the water cooling system.
  • a relevant nozzle head for oxygen blowing lances and burner lances and a method for its production are known.
  • the outer surface of the nozzle head and the inner surface of the outlet openings are covered with a molybdenum layer. Due to this protective layer, the durability of the nozzle head, especially with regard to edge wear, is increased under the specified operating conditions.
  • JP 63-20 6420 (in Patents Abstr. Of Japan, Sect C, Vol. 12 (1988), No. 496 (C-555)) describes a blowing lance for converters or the like, in which the end regions the outlet openings are lined with heat-resistant metal or ceramic. This also increases the service life of this blowing lance.
  • the object of the present invention is now to provide an effective, reliable and applicable for as many materials as possible method for producing a cooled blow lance head of the type mentioned, in which the edge wear at the nozzle outlet openings is considerably reduced and the service life of the blow lance head is increased under optimal flow conditions can be.
  • This object is achieved according to the invention in a method of the type mentioned at the outset in that reinforcing material is applied to the blow lance head shell in the region of the nozzle outlet openings at least before the nozzle outlet openings are finished and then the nozzle outlet openings are drilled through this reinforcing material into the blow lance head shell to the desired diameter.
  • the contours of the nozzle outlet openings, in particular also in their edge region, are only determined when the reinforcing material is already connected to the base material of the blow lance head shell.
  • the method according to the invention can also be carried out in such a way that the reinforcing material in the form of rings or disks is placed on the blow lance head shell in the region of the nozzle outlet openings and is then intimately connected to the blow lance head shell.
  • the rings or disks then form the edge region of these openings after the nozzle outlet openings have been drilled.
  • the method according to the invention can also be carried out in such a way that the blow lance head shell is provided with recesses on the outside in the region of the nozzle outlet openings still to be created, that the reinforcing material is introduced into these recesses and intimately connected to the blow lance head shell and that the nozzle outlet openings are finally drilled to the desired diameter.
  • the reinforcing material can be arranged particularly securely and firmly in the recesses.
  • the method according to the invention can also be carried out in such a way that the blow lance head shell is provided with through openings which widen at its outer edge region, that reinforcing material is placed in these edge regions and is intimately connected to the blow lance head shell, and that finally the nozzle outlet openings are drilled through the reinforcement material to the desired diameter will.
  • the nozzle outlet openings are thus determined in two successive steps, the final contour of course only being obtained after the second drilling process.
  • the method according to the invention can be carried out in such a way that the reinforcing material is connected to the blow lance shell by explosive welding, by cladding, friction welding, electron welding, diffusion welding, soldering or spraying. You have to choose the type of connection that best takes into account the respective circumstances and, above all, takes into account the material and temperature conditions.
  • FIG. 1 shows a blow lance head 1 with a blow lance head shell 2 and a shaft 3. These interconnected parts are provided with cooling channels 4, which are formed in the usual way.
  • Nozzle outlet openings 5, 6 are provided in the blow lance head shell 2 of the blow lance head 1.
  • the nozzle outlet opening 5 in the region of its outlet edge 7 is designed differently than the nozzle outlet opening 6 in the region of its outlet edge 8.
  • three or more are generally of the same design Nozzle outlet openings 5 or 6 can be provided in the blow lance head shell 2. The method for producing the outlet edges 7, 8 is explained by FIG. 3.
  • the blank shown in Fig. 2 for a blow lance bowl 2 is forged or cast. It consists in particular of forged or cast copper. It has sections 10 for receiving through openings 11.
  • a through opening 11 is first introduced into a section 10, which widens outwards, that is, downwards.
  • a ring 12 made of a reinforcing material is used, which is intimately connected to the base material of the blow lance head shell 2.
  • the through opening 11 is brought to the desired dimension of the nozzle outlet opening 5 by drilling or milling, and the contour for the gas outlet is thus precisely determined.
  • the nozzle outlet opening 5 is accordingly still fixed and determined at its outlet edge 7 by the reinforcing material. This is shown on the left in FIG. 1.
  • a flat recess 13 is first formed on the outlet side of the nozzle outlet opening that is still to be manufactured. Reinforcing material is introduced into this recess 13, where it forms a plate-like insert 14 which is intimately connected to the base material.
  • the nozzle outlet opening 6 is now formed by milling or drilling. The outlet edge 8 of this nozzle outlet opening is then clearly determined by the reinforcing material, as shown on the right in FIG. 1.
  • dispersion-strengthened copper materials with high conductivity, highly heat-resistant nickel-based materials, austenitic steels, nickel, molybdenum and tungsten can be considered as the reinforcing material in the various embodiments.
  • the blow lance head shell 2 is connected to the rest of the blow lance head 1 by screws.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
EP92106576A 1991-04-26 1992-04-16 Procédé pour la fabrication d'une tête d'injection refroidie à l'eau pour une lance de soufflage Withdrawn EP0510518A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19914113660 DE4113660C1 (fr) 1991-04-26 1991-04-26
DE4113660 1991-04-26

Publications (1)

Publication Number Publication Date
EP0510518A1 true EP0510518A1 (fr) 1992-10-28

Family

ID=6430411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92106576A Withdrawn EP0510518A1 (fr) 1991-04-26 1992-04-16 Procédé pour la fabrication d'une tête d'injection refroidie à l'eau pour une lance de soufflage

Country Status (2)

Country Link
EP (1) EP0510518A1 (fr)
DE (1) DE4113660C1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997000973A1 (fr) * 1995-06-23 1997-01-09 Jacques Thomas Tuyere de soufflage avec nez de lance soude pour le brassage de bains
DE102009060827A1 (de) 2009-12-29 2011-06-30 SMS Siemag Aktiengesellschaft, 40237 Lanzenkopf für eine Blaslanze mit einem keramischen Düseneinsatz
RU2533074C1 (ru) * 2013-06-24 2014-11-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Южно-Уральский государственный университет" (национальный исследовательский университет) (ФГБОУ ВПО "ЮУрГУ" (НИУ)) Фурма для продувки металла
US9103503B2 (en) 2010-03-31 2015-08-11 Sms Siemag Ag Device for injecting gas into a metallurgical vessel
WO2019166571A1 (fr) 2018-02-28 2019-09-06 Sms Group Gmbh Tête de lance de soufflage à protection contre l'usure des bords des ouvertures de sortie de buses

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10102854C2 (de) * 2001-01-23 2002-11-28 Impact Ges Fuer Nichteisenmeta Lanzenkopf für eine Sauerstofflanze

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE463417C (de) * 1927-01-09 1928-07-27 Gornoslaskie Zjednoczone Huty Schlacken- und Windform fuer Hochoefen
GB1084420A (en) * 1964-12-28 1967-09-20 Metallurg D Esperancelongdoz S Metallurgical blowing lances
AT313945B (de) * 1969-08-14 1974-03-11 Voest Ag Düsenkopf für Sauerstoffblaslanzen und Brennerlanzen und Verfahren zur Herstellung desselben
DE2759289A1 (de) * 1977-10-12 1979-04-19 Mohammad Reza Dr I Hassanzadeh Hochofenblasform und l d duese mit einer schutzschicht aus metallischem werkstoff (roheisen oder stahl)
US4167386A (en) * 1977-09-26 1979-09-11 Muesco-Mallay Houston, Inc. Extrusion die plate construction
JPS63206420A (ja) * 1987-02-23 1988-08-25 Kawasaki Steel Corp 転炉等の吹錬用ランス

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE463417C (de) * 1927-01-09 1928-07-27 Gornoslaskie Zjednoczone Huty Schlacken- und Windform fuer Hochoefen
GB1084420A (en) * 1964-12-28 1967-09-20 Metallurg D Esperancelongdoz S Metallurgical blowing lances
AT313945B (de) * 1969-08-14 1974-03-11 Voest Ag Düsenkopf für Sauerstoffblaslanzen und Brennerlanzen und Verfahren zur Herstellung desselben
US4167386A (en) * 1977-09-26 1979-09-11 Muesco-Mallay Houston, Inc. Extrusion die plate construction
DE2759289A1 (de) * 1977-10-12 1979-04-19 Mohammad Reza Dr I Hassanzadeh Hochofenblasform und l d duese mit einer schutzschicht aus metallischem werkstoff (roheisen oder stahl)
JPS63206420A (ja) * 1987-02-23 1988-08-25 Kawasaki Steel Corp 転炉等の吹錬用ランス

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 496 (C-555)(3343) 23. Dezember 1988 & JP-A-63 206 420 ( KAWASAKI STEEL ) 25. August 1988 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997000973A1 (fr) * 1995-06-23 1997-01-09 Jacques Thomas Tuyere de soufflage avec nez de lance soude pour le brassage de bains
EA000183B1 (ru) * 1995-06-23 1998-12-24 Жак Тома Фурма со сварным сопловым наконечником для продувки расплава
CN1064998C (zh) * 1995-06-23 2001-04-25 雅各·托马斯 用于搅拌熔池的带有焊制喷枪头的风嘴
DE102009060827A1 (de) 2009-12-29 2011-06-30 SMS Siemag Aktiengesellschaft, 40237 Lanzenkopf für eine Blaslanze mit einem keramischen Düseneinsatz
EP2341155A1 (fr) 2009-12-29 2011-07-06 SMS Siemag AG Tete de lance pour une lance de soufflage comprenant une buse ceramique
US9103503B2 (en) 2010-03-31 2015-08-11 Sms Siemag Ag Device for injecting gas into a metallurgical vessel
RU2533074C1 (ru) * 2013-06-24 2014-11-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Южно-Уральский государственный университет" (национальный исследовательский университет) (ФГБОУ ВПО "ЮУрГУ" (НИУ)) Фурма для продувки металла
WO2019166571A1 (fr) 2018-02-28 2019-09-06 Sms Group Gmbh Tête de lance de soufflage à protection contre l'usure des bords des ouvertures de sortie de buses

Also Published As

Publication number Publication date
DE4113660C1 (fr) 1992-12-03

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