EP0861337B1 - Verfahren zur entkohlung von stahlschmelzen - Google Patents

Verfahren zur entkohlung von stahlschmelzen Download PDF

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Publication number
EP0861337B1
EP0861337B1 EP96938974A EP96938974A EP0861337B1 EP 0861337 B1 EP0861337 B1 EP 0861337B1 EP 96938974 A EP96938974 A EP 96938974A EP 96938974 A EP96938974 A EP 96938974A EP 0861337 B1 EP0861337 B1 EP 0861337B1
Authority
EP
European Patent Office
Prior art keywords
oxygen
vessel
decarburisation
fuel
decarburization
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
EP96938974A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0861337A1 (de
Inventor
Horst-Dieter Dr. SCHÖLER
Volker Dr.-Ing. Wiegmann
Rainer Dipl.-Ing. Dittrich
Frank Dr.-Ing. Haers
Leo Peeters
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.)
SMS Siemag AG
Original Assignee
SMS Demag AG
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 SMS Demag AG filed Critical SMS Demag AG
Publication of EP0861337A1 publication Critical patent/EP0861337A1/de
Application granted granted Critical
Publication of EP0861337B1 publication Critical patent/EP0861337B1/de
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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • 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
    • F27D2003/168—Introducing a fluid jet or current into the charge through a lance
    • F27D2003/169—Construction of the lance, e.g. lances for injecting particles
    • 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
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0028—Regulation
    • F27D2019/0075—Regulation of the charge quantity

Definitions

  • the invention relates to a process for the decarburization of molten steel in a closed metallurgical vessel connected to a vacuum system and into the Oxygen can be introduced via a lance and combustible materials via a feed device are.
  • EP 0 110 809 describes a method for Treatment of steel in the pan by means of reactive slags is known in which one metallothermal reaction is provided, with the help of a lance oxygen in a the melt immersed bell is blown in, flammable metallic substances underneath Formation of reactive slags react and below the pipe in which the steel treatment takes place, a neutral or reducing purge gas is injected.
  • EP 0 347 884 B1 discloses a process for degassing and decarburizing molten steel, in which steel has led from a container into a vacuum chamber and an oxygen lance is arranged in the vacuum chamber at a given distance, from which oxygen or oxygen-containing gas is used Combustion of the CO is inflated near the surface of the molten steel in the vacuum chamber. Taking into account a predetermined ratio of (CO + CO 2 ) / exhaust gas amount or CO / (CO + CO 2 ), oxygen or an oxygen-containing gas is supplied through a CO combustion lance near the surface of the molten steel located in the vacuum chamber .
  • This process does not show the melt at certain pressure conditions heat up chemically and inflate with a defined excess amount of oxygen.
  • the aim of the invention is to provide a method for decarburizing a molten steel create the decarburization time while realizing a high degree of oxide purity shortened and / or the final carbon content is reduced.
  • this is carried out in addition to that during the decarburization phase of the supplementary oxygen used in the carbon degradation, further oxygen is blown in and at the same time added metallic fuel.
  • the chemical heating agent for example in the form of aluminum powder, can be used in a special way to accelerate decarburization.
  • the reaction kinetics are influenced by the Al 2 O 3 particles formed during heating. These deoxidation products act as foreign germs and can therefore force the decarburization rate, especially through the formation of CO bubbles.
  • a combination lance is used in which the oxygen and the metallic fuels are promoted.
  • these through a separate tube Feed the vessel.
  • any partial temperature increase during a Decarburization can be realized under vacuum.
  • This has the advantage of being typical Temperature losses such as due to insufficiently preheated treatment vessels or steel pans and due to delays due to transportation or extended To compensate for treatment times.
  • FIG. 1 shows a vacuum vessel 43 provided with a lid 44, which has a Suction line 42 is connected to a vacuum system 41.
  • a vacuum vessel there is a metallurgical vessel 10 which has a jacket 12 which with a refractory lining 13 is provided inside.
  • the vessel is with melt S filled.
  • a measuring lance 28 and a combination lance 31 protrude through the cover 44.
  • the combination lance 31 has a feed line 32 for oxygen and a feed line 33 for metallic fabrics.
  • a barrier 34 and on the Supply line 33 is provided with a shut-off 35.
  • the barriers 34 and 35 have Control units 23, 25 on the control lines 24, 26 with a measuring and Control device 22 are connected.
  • This measuring and control device 22 is a Measuring line 27 with a measuring element 21 provided on the measuring lance 28 for Measurement of the temperature T and a measuring element 29 for measuring the in the vessel space prevailing pressure P.
  • FIG Melt An open metallurgical vessel 10 is used in FIG Melt is filled, with a tube feed 46 and a in the melt Immerse the pipe outlet 47 of an RH vessel 45.
  • the RH vessel is over one Suction line 42 connected to a vacuum system 41.
  • Combination lance 31 protrudes into the RH vessel for the supply of particularly coarse Solids into a pipe 38 which is closed by a shut-off 37 with a container 36 in Connection is established.
  • the measuring and regulating and the control device is as in the Figure 1 trained.
  • FIG. 3 shows a vessel 10 which is closed by a lid 15, the one Bell 14 has the mouth side into the melt S located in the vessel 10 immersed.
  • the Sautechnisch 42 connected to the vacuum 41 is designed so that a lockable branch is provided, once to the bell 14 with the Barrier 48 and to cover 15 with barrier 49.
  • the measuring and regulating device as well as the control device are as in the Figures 1 or 2 designed.
  • the temperature measuring element 21 is through the metallic jacket 12 of the vessel 10 led deep into the refractory lining 13.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Coating With Molten Metal (AREA)
EP96938974A 1995-11-17 1996-11-06 Verfahren zur entkohlung von stahlschmelzen Expired - Lifetime EP0861337B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19544166 1995-11-17
DE19544166 1995-11-17
DE19548641 1995-12-13
DE19548641 1995-12-13
PCT/DE1996/002165 WO1997019197A1 (de) 1995-11-17 1996-11-06 Verfahren und vorrichtung zur entkohlung von stahlschmelzen

Publications (2)

Publication Number Publication Date
EP0861337A1 EP0861337A1 (de) 1998-09-02
EP0861337B1 true EP0861337B1 (de) 2001-08-01

Family

ID=26020703

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96938974A Expired - Lifetime EP0861337B1 (de) 1995-11-17 1996-11-06 Verfahren zur entkohlung von stahlschmelzen

Country Status (13)

Country Link
US (1) US6235084B1 (cs)
EP (1) EP0861337B1 (cs)
JP (1) JP2000500528A (cs)
KR (1) KR100287568B1 (cs)
CN (1) CN1067438C (cs)
AT (1) ATE203778T1 (cs)
AU (1) AU7620696A (cs)
CZ (1) CZ294517B6 (cs)
DE (2) DE59607427D1 (cs)
PL (1) PL192625B1 (cs)
RU (1) RU2159819C2 (cs)
TW (1) TW403788B (cs)
WO (1) WO1997019197A1 (cs)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2213147C2 (ru) * 2001-09-28 2003-09-27 Шатохин Игорь Михайлович Способ циркуляционного вакуумирования жидкого металла, система и устройства для его осуществления
DE10347200B4 (de) * 2002-12-13 2005-07-21 Sms Mevac Gmbh Entgasungsverfahren von Flüssigstahl
EP1428894A1 (de) * 2002-12-13 2004-06-16 SMS Mevac GmbH Entgasungsverfahren von Flüssigstahl
GB0427832D0 (en) * 2004-12-20 2005-01-19 Boc Group Plc Degassing molten metal
US20110127701A1 (en) * 2009-11-30 2011-06-02 Grant Michael G K Dynamic control of lance utilizing co-flow fluidic techniques
US8323558B2 (en) * 2009-11-30 2012-12-04 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Dynamic control of lance utilizing counterflow fluidic techniques
US8377372B2 (en) * 2009-11-30 2013-02-19 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Dynamic lances utilizing fluidic techniques
CN101871035A (zh) * 2010-05-31 2010-10-27 北京科技大学 一种用于无取向硅钢生产的精炼装置及真空精炼工艺
TWI515301B (zh) * 2012-03-08 2016-01-01 杰富意鋼鐵股份有限公司 使用真空除氣系統製造超低碳鋼的方法
CN103397137B (zh) * 2013-08-02 2015-04-22 首钢总公司 一种车轮钢的生产方法
KR101450651B1 (ko) 2013-11-27 2014-10-15 우진 일렉트로나이트(주) 연속 측온 장치 및 이를 포함하는 ｒｈ장치
JP6331851B2 (ja) * 2014-08-05 2018-05-30 新日鐵住金株式会社 取鍋内溶鋼の加熱方法
KR102034264B1 (ko) * 2018-08-03 2019-10-17 주식회사 포스코 용선 처리 장치 및 용선 처리 방법
WO2020097937A1 (zh) * 2018-11-16 2020-05-22 青岛云路先进材料技术股份有限公司 雾化制粉设备及雾化制粉方法

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
DE1758107U (de) * 1957-08-07 1957-12-19 Turck P C Wwe Klip fuer hosentraeger.
DE1758107B2 (de) * 1968-04-04 1976-03-04 Edelstahlwerk Witten Ag, 5810 Witten Verfahren zum herstellen von rostfreien chrom- und chrom-nickel-staehlen
US3702243A (en) * 1969-04-15 1972-11-07 Nat Steel Corp Method of preparing deoxidized steel
US3850617A (en) * 1970-04-14 1974-11-26 J Umowski Refining of stainless steel
DE2114600B2 (de) * 1971-03-25 1981-05-07 Vacmetal Gesellschaft für Vakuum-Metallurgie mbH, 4600 Dortmund Verfahren zur gezielten Vakuumentkohlung hochlegierter Stähle
JPS5381418A (en) * 1976-12-28 1978-07-18 Nippon Steel Corp Manufacture of low phosphorus steel by vacuum degassing method
SU789591A1 (ru) * 1978-06-19 1980-12-23 Череповецкий Ордена Ленина Металлургический Завод Им. 50- Летия Ссср Способ производства малоуглеродистой стали
CH642998A5 (en) * 1979-03-23 1984-05-15 Fischer Ag Georg Process for chemically heating a steel melt
SU916553A1 (ru) * 1980-07-14 1982-03-30 Dyakov Stanislav Способ нагрева вакуумной камеры1
US4612043A (en) * 1984-03-29 1986-09-16 Pennsylvania Engineering Corporation Steel making method
US5174979A (en) * 1989-10-06 1992-12-29 Uop Mixed ion-exchanged zeolites and processes for the use thereof in gas separations
RU2002816C1 (ru) * 1991-07-29 1993-11-15 Череповецкий металлургический комбинат Способ дегазации и десульфурации нержавеющей стали
DE4442362C1 (de) * 1994-11-18 1996-04-18 Mannesmann Ag Verfahren und Vorrichtung zum Behandeln von einer in einem metallurgischen Gefäß befindlichen Metallschmelze
BR9606545A (pt) * 1995-08-01 1997-12-30 Nippon Steel Corp Mpetodo de refinação a vácuo para aço fundido

Also Published As

Publication number Publication date
TW403788B (en) 2000-09-01
WO1997019197A1 (de) 1997-05-29
CZ152598A3 (cs) 1999-05-12
CN1203634A (zh) 1998-12-30
KR19990067543A (ko) 1999-08-25
DE19680993D2 (de) 1999-01-28
AU7620696A (en) 1997-06-11
EP0861337A1 (de) 1998-09-02
CN1067438C (zh) 2001-06-20
JP2000500528A (ja) 2000-01-18
PL192625B1 (pl) 2006-11-30
PL326635A1 (en) 1998-10-12
RU2159819C2 (ru) 2000-11-27
US6235084B1 (en) 2001-05-22
ATE203778T1 (de) 2001-08-15
DE59607427D1 (de) 2001-09-06
KR100287568B1 (ko) 2001-04-16
CZ294517B6 (cs) 2005-01-12

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