EP0223991A1 - Verfahren zur Kühlung von Sauerstoff-Einblasdüsen bei der Sauerstoffbehandlung von Roheisen oder Stahl - Google Patents

Verfahren zur Kühlung von Sauerstoff-Einblasdüsen bei der Sauerstoffbehandlung von Roheisen oder Stahl Download PDF

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Publication number
EP0223991A1
EP0223991A1 EP86113945A EP86113945A EP0223991A1 EP 0223991 A1 EP0223991 A1 EP 0223991A1 EP 86113945 A EP86113945 A EP 86113945A EP 86113945 A EP86113945 A EP 86113945A EP 0223991 A1 EP0223991 A1 EP 0223991A1
Authority
EP
European Patent Office
Prior art keywords
cooling
oxygen
steel
liquid
liquid metal
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Withdrawn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
EP86113945A
Other languages
German (de)
English (en)
French (fr)
Inventor
Eckehard Prof. Dr.-Ing. Förster
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.)
Neue Hamburger Stahlwerke GmbH
Hamburger Stahlwerke GmbH
Original Assignee
Neue Hamburger Stahlwerke GmbH
Hamburger Stahlwerke 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 Neue Hamburger Stahlwerke GmbH, Hamburger Stahlwerke GmbH filed Critical Neue Hamburger Stahlwerke GmbH
Publication of EP0223991A1 publication Critical patent/EP0223991A1/de
Withdrawn legal-status Critical Current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
    • C21C5/30—Regulating or controlling the blowing
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • 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
    • 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
    • C21C5/48—Bottoms or tuyéres of converters
    • 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
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/24—Cooling arrangements
    • 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
    • C21C2005/4626—Means for cooling, e.g. by gases, fluids or liquids

Definitions

  • the invention relates generically to a method for cooling oxygen bin blowing nozzles having at least one cooling element in the oxygen treatment of pig iron or steel in a bottom blowing converter, Siemens biartin furnace, electric furnace or in another metallurgical vessel, with the cooling jacket a liquid is passed through and the oxygen injection nozzle is kept at a temperature below 600 ° C.
  • a liquid is passed through and the oxygen injection nozzle is kept at a temperature below 600 ° C.
  • the cooling liquid is water, the disadvantages described occurring. It is not circulated through a heat exchanger, but taken from a storage facility or network and fed to the wastewater.
  • the invention has for its object to carry out the generic method so that an explosion due to penetration of the cooling liquid in the liquid steel in the event of breakage of a bias nozzle can no longer arise and that a sufficient cooling effect is also ensured.
  • the invention teaches that a liquid metal is used as the cooling liquid and this is recirculated in the circuit via a heat exchanger for removing the warm that is taken up in the oxygen injection nozzle.
  • a liquid metal with a boiling point of at least 600 ° C. is used.
  • Liquid metals that can be used as coolants are sodium and potassium and their alloys, as well as lithium or lithium / lead alloys, the temperature when entering the heating jacket is between -10 ° C. and 600 ° C.
  • the cooling can, however, also be carried out as auxiliary cooling with a liquefied metal which already has a temperature of 400 ° C. or more when it enters the cooling jacket.
  • a pump must be used for the circuit. Since the use of a liquid metal as a coolant does not result in the pressure waves resulting in an explosive ejection of the molten steel when a blow-in nozzle breaks, it is not necessary, in the manner described at the outset, to clean the liquid metal through the nickel shell of the oxygen blow-in nozzle, It is also possible to print the liquid metal through the cooling jacket using a pump. This allows a large flow of electricity and thereby intensive cooling.
  • the converter 1 recognizable in the figure has the usual design and lining, Kan recognizes the metal bath 2 and a slag layer 3 as well as in the bottom 4 of the converter 1 a Saubstoff-Eimbisadüse 5, which has a sensing jacket.
  • the blowing in of the oxygen, to which another gas or a processing agent for the melt can be added, is carried out in such a way that a metal bubble 7 with an emulsified slag is obtained via the chlack layer.
  • the cooling liquid which is introduced into the cooling jacket 6 of the oxygen blowing nozzle 5 is a liquid concrete. which in Circulation is pumped over a heat exchanger 8.
  • the pump ⁇ is a pressure pump in the exemplary embodiment. It can also be a singing pump.
  • the heat exchanger 8 is designed in such a way that the heat absorbed in the oxygen injection nozzle is dissipated in the heat exchanger 8.
  • the heat-dissipating heat transfer medium in the heat exchanger 8 is, for example, hater, which is fed in at 10 and discharged at 11.
  • the height of the metal circuit is appropriately arranged so that the pressure of the liquid metal in the gas is only slightly above or below the hydrostatic pressure of the iron bath on the nozzle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
EP86113945A 1985-11-27 1986-10-08 Verfahren zur Kühlung von Sauerstoff-Einblasdüsen bei der Sauerstoffbehandlung von Roheisen oder Stahl Withdrawn EP0223991A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3541909A DE3541909C1 (de) 1985-11-27 1985-11-27 Verfahren zur Kuehlung von Sauerstoff-Einblasduesen bei der Sauerstoffbehandlung von Roheisen oder Stahl
DE3541909 1985-11-27

Publications (1)

Publication Number Publication Date
EP0223991A1 true EP0223991A1 (de) 1987-06-03

Family

ID=6286983

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113945A Withdrawn EP0223991A1 (de) 1985-11-27 1986-10-08 Verfahren zur Kühlung von Sauerstoff-Einblasdüsen bei der Sauerstoffbehandlung von Roheisen oder Stahl

Country Status (13)

Country Link
EP (1) EP0223991A1 (fi)
JP (1) JPS62196315A (fi)
KR (1) KR870005102A (fi)
CN (1) CN86107834A (fi)
AU (1) AU6466386A (fi)
BR (1) BR8605740A (fi)
CS (1) CS262680B2 (fi)
DD (1) DD250722A5 (fi)
DE (1) DE3541909C1 (fi)
FI (1) FI864322A (fi)
HU (1) HU195257B (fi)
PL (1) PL262478A1 (fi)
ZA (1) ZA867898B (fi)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0302405A2 (en) * 1987-08-01 1989-02-08 Kawasaki Jukogyo Kabushiki Kaisha Pouring device of molten-metal-containing vessel
WO1992007965A1 (en) * 1990-10-31 1992-05-14 Minproc Technology, Inc Metallurgical lance
EP0834579A1 (en) * 1996-09-27 1998-04-08 DANIELI & C. OFFICINE MECCANICHE S.p.A. Cooling system for electrodes in D.C. electric arc furnaces
WO1999022032A1 (en) * 1997-10-24 1999-05-06 Mcgill University Inclined heat pipe lance or tuyere with controllable heat extraction

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10252276C1 (de) * 2002-11-11 2003-10-30 Rhi Ag Wien Metallurgisches Schmelzgefäß und Verfahren zur sekundärmetallurgischen Behandlung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE763565C (de) * 1938-10-11 1951-12-20 Otto Dr-Ing Lellep Fluessigkeitsgekuehlter Boden fuer Konverter
DE1103366B (de) * 1958-01-25 1961-03-30 Steinmueller Gmbh L & C Verfahren zum Kuehlen hochbeanspruchter Teile an metallurgischen oder chemischen OEfen
GB880784A (en) * 1958-02-12 1961-10-25 Steinmueller Gmbh L & C Improvements relating to the high-temperature cooling of industrial furnaces
US3744780A (en) * 1972-01-07 1973-07-10 Applied Techn Corp Method of treating molten material by use of a lance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE763565C (de) * 1938-10-11 1951-12-20 Otto Dr-Ing Lellep Fluessigkeitsgekuehlter Boden fuer Konverter
DE1103366B (de) * 1958-01-25 1961-03-30 Steinmueller Gmbh L & C Verfahren zum Kuehlen hochbeanspruchter Teile an metallurgischen oder chemischen OEfen
GB880784A (en) * 1958-02-12 1961-10-25 Steinmueller Gmbh L & C Improvements relating to the high-temperature cooling of industrial furnaces
US3744780A (en) * 1972-01-07 1973-07-10 Applied Techn Corp Method of treating molten material by use of a lance

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0302405A2 (en) * 1987-08-01 1989-02-08 Kawasaki Jukogyo Kabushiki Kaisha Pouring device of molten-metal-containing vessel
EP0302405A3 (en) * 1987-08-01 1990-05-23 Kawasaki Jukogyo Kabushiki Kaisha Pouring device of molten-metal-containing vessel
WO1992007965A1 (en) * 1990-10-31 1992-05-14 Minproc Technology, Inc Metallurgical lance
US5350158A (en) * 1990-10-31 1994-09-27 Mincorp Limited Metallurgical lance and method of cooling the lance
EP0834579A1 (en) * 1996-09-27 1998-04-08 DANIELI & C. OFFICINE MECCANICHE S.p.A. Cooling system for electrodes in D.C. electric arc furnaces
US5889809A (en) * 1996-09-27 1999-03-30 Danieli & C. Officine Meccaniche Spa Cooling system for electrodes in D.C. electric arc furnaces
WO1999022032A1 (en) * 1997-10-24 1999-05-06 Mcgill University Inclined heat pipe lance or tuyere with controllable heat extraction

Also Published As

Publication number Publication date
DE3541909C1 (de) 1987-06-11
KR870005102A (ko) 1987-06-04
AU6466386A (en) 1987-06-04
JPS62196315A (ja) 1987-08-29
CS861586A2 (en) 1988-08-16
CS262680B2 (en) 1989-03-14
HU195257B (en) 1988-04-28
DD250722A5 (de) 1987-10-21
FI864322A0 (fi) 1986-10-24
FI864322A (fi) 1987-05-28
PL262478A1 (en) 1987-10-05
JPH0137447B2 (fi) 1989-08-07
CN86107834A (zh) 1987-05-27
HUT43650A (en) 1987-11-30
ZA867898B (en) 1987-06-24
BR8605740A (pt) 1987-08-25

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

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Effective date: 19890417

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Withdrawal date: 19890520

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Effective date: 19890520

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FOERSTER, ECKEHARD, PROF. DR.-ING.