EP0861337A1 - Method and device for decarburizing steels melts - Google Patents
Method and device for decarburizing steels meltsInfo
- Publication number
- EP0861337A1 EP0861337A1 EP96938974A EP96938974A EP0861337A1 EP 0861337 A1 EP0861337 A1 EP 0861337A1 EP 96938974 A EP96938974 A EP 96938974A EP 96938974 A EP96938974 A EP 96938974A EP 0861337 A1 EP0861337 A1 EP 0861337A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oxygen
- vessel
- melt
- metallic
- 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.)
- Granted
Links
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 which is connected to a vacuum system and into which combustible substances can be introduced oxygen and a feed device, and a corresponding device for carrying out the process
- EP 0 1 10 809 discloses a method for treating steel in the ladle by means of reactive slags, in which a metallothermic reaction is provided, with With the help of a lance, oxygen is blown into a bell immersed in the melt, combustible metallic substances react to form reactive slags and a neutral or reducing purge gas is blown in below the pipe in which the steel treatment takes place
- Vacuum chamber and an oxygen lance is arranged in the vacuum chamber at a given distance, from which oxygen or oxygen-containing gas for burning the CO is inflated near the surface of the molten steel located in the vacuum chamber, taking into account a predetermined ratio of (CO + CO 2 ) / Amount of exhaust gas 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 in the vacuum chamber
- the invention has set itself the goal of creating a method and a corresponding device for decarburizing a steel melt, in which the decarburization time is reduced and / or the end carbon content is reduced while realizing a high degree of oxide purity
- 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 conveyed.
- Figure 1 Treatment in a vacuum vessel.
- FIG. 1 Treatment in an RH vessel.
- Figure 3 Treatment in a closed pan.
- 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 In the vacuum vessel there is a metallurgical vessel 10 which has a jacket 12 which is provided with a refractory lining 13 on the inside. The vessel is filled with melt S.
- 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 substances.
- a shut-off 34 is provided on the feed line 32 and a shut-off 35 on the feed line 33.
- the barriers 34 and 35 have
- Control elements 23, 25, which are connected to a measuring and regulating device 22 via control lines 24, 26.
- This measuring and control device 22 is connected via a measuring line 27 to a measuring element 21 provided on the measuring lance 28 for measuring the temperature T and a measuring element 29 for measuring the pressure P prevailing in the vessel space.
- an open metallurgical vessel 10 is used, which is filled with melt, a tube feed 46 and a tube outlet 47 of an RH vessel 45 being immersed in the melt.
- the RH vessel is connected to a vacuum system 41 via a suction line 42.
- Combination lance 31 projects into the RH vessel for supplying, in particular, coarse solids, a tube 38 which is connected to a container 36 by a shut-off 37.
- the measuring, regulating and control device is designed as in FIG. 1.
- FIG. 3 shows a vessel 10 which is closed by a lid 15 which has a bell 14 which, on the mouth side, is immersed in the melt S located in the vessel 10.
- the suction line 42 connected to the vacuum 41 is designed in such a way that a lockable branch is provided, specifically to the bell 14 with the shutoff 48 and to the cover 15 with the shutoff 49.
- the measuring and regulating device as well as the control device are designed as in FIGS. 1 or 2.
- the temperature measuring element 21 is guided through the metallic jacket 12 of the vessel 10 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)
Abstract
Description
Claims
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 (en) | 1995-11-17 | 1996-11-06 | Method and device for decarburizing steels melts |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0861337A1 true EP0861337A1 (en) | 1998-09-02 |
EP0861337B1 EP0861337B1 (en) | 2001-08-01 |
Family
ID=26020703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96938974A Expired - Lifetime EP0861337B1 (en) | 1995-11-17 | 1996-11-06 | Method for decarburizing steels melts |
Country Status (13)
Country | Link |
---|---|
US (1) | US6235084B1 (en) |
EP (1) | EP0861337B1 (en) |
JP (1) | JP2000500528A (en) |
KR (1) | KR100287568B1 (en) |
CN (1) | CN1067438C (en) |
AT (1) | ATE203778T1 (en) |
AU (1) | AU7620696A (en) |
CZ (1) | CZ294517B6 (en) |
DE (2) | DE19680993D2 (en) |
PL (1) | PL192625B1 (en) |
RU (1) | RU2159819C2 (en) |
TW (1) | TW403788B (en) |
WO (1) | WO1997019197A1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10347200B4 (en) * | 2002-12-13 | 2005-07-21 | Sms Mevac Gmbh | Degassing of liquid steel |
EP1428894A1 (en) * | 2002-12-13 | 2004-06-16 | SMS Mevac GmbH | A method of degassing molten steel |
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 |
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 |
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 |
CN101871035A (en) * | 2010-05-31 | 2010-10-27 | 北京科技大学 | Refining device and vacuum refining process for use in non-oriented silicon steel production |
TWI515301B (en) * | 2012-03-08 | 2016-01-01 | 杰富意鋼鐵股份有限公司 | Method for manufacturing ultra low carbon steel by using vacuum-degassing system |
CN103397137B (en) * | 2013-08-02 | 2015-04-22 | 首钢总公司 | Preparation method of wheel steel |
KR101450651B1 (en) * | 2013-11-27 | 2014-10-15 | 우진 일렉트로나이트(주) | Continuous Temperature Sensor and RH apparatus including it |
JP6331851B2 (en) * | 2014-08-05 | 2018-05-30 | 新日鐵住金株式会社 | Heating method of molten steel in ladle |
KR102034264B1 (en) * | 2018-08-03 | 2019-10-17 | 주식회사 포스코 | Apparatus for processing hot metal and method for processing hot metal |
KR102398040B1 (en) * | 2018-11-16 | 2022-05-16 | 칭다오 윤루 어드밴스드 머티어리얼스 테크놀로지 씨오.,엘티디. | Atomization subdivision apparatus and atomization subdivision method |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1758107B2 (en) * | 1968-04-04 | 1976-03-04 | Edelstahlwerk Witten Ag, 5810 Witten | PROCESS FOR MANUFACTURING STAINLESS CHROME AND CHROME-NICKEL STEELS |
US3702243A (en) * | 1969-04-15 | 1972-11-07 | Nat Steel Corp | Method of preparing deoxidized steel |
DE2114600B2 (en) * | 1971-03-25 | 1981-05-07 | Vacmetal Gesellschaft für Vakuum-Metallurgie mbH, 4600 Dortmund | Process for targeted vacuum decarburization of high-alloy steels |
JPS5381418A (en) * | 1976-12-28 | 1978-07-18 | Nippon Steel Corp | Manufacture of low phosphorus steel by vacuum degassing method |
SU789591A1 (en) * | 1978-06-19 | 1980-12-23 | Череповецкий Ордена Ленина Металлургический Завод Им. 50- Летия Ссср | Method of producing low-carbon steel |
US4612043A (en) * | 1984-03-29 | 1986-09-16 | Pennsylvania Engineering Corporation | Steel making method |
DE4442362C1 (en) * | 1994-11-18 | 1996-04-18 | Mannesmann Ag | Method and appts. for performing a variety of processes on a melt using standard equipment |
KR100214927B1 (en) * | 1995-08-01 | 1999-08-02 | 아사무라 타카싯 | Vacuum refining method of molten metal |
-
1996
- 1996-11-06 PL PL326635A patent/PL192625B1/en not_active IP Right Cessation
- 1996-11-06 DE DE19680993T patent/DE19680993D2/en not_active Ceased
- 1996-11-06 EP EP96938974A patent/EP0861337B1/en not_active Expired - Lifetime
- 1996-11-06 AT AT96938974T patent/ATE203778T1/en not_active IP Right Cessation
- 1996-11-06 DE DE59607427T patent/DE59607427D1/en not_active Expired - Fee Related
- 1996-11-06 AU AU76206/96A patent/AU7620696A/en not_active Abandoned
- 1996-11-06 KR KR1019980703565A patent/KR100287568B1/en not_active IP Right Cessation
- 1996-11-06 WO PCT/DE1996/002165 patent/WO1997019197A1/en active IP Right Grant
- 1996-11-06 CZ CZ19981525A patent/CZ294517B6/en not_active IP Right Cessation
- 1996-11-06 RU RU98111743/02A patent/RU2159819C2/en not_active IP Right Cessation
- 1996-11-06 US US09/077,040 patent/US6235084B1/en not_active Expired - Lifetime
- 1996-11-06 JP JP9519280A patent/JP2000500528A/en active Pending
- 1996-11-06 CN CN96198781A patent/CN1067438C/en not_active Expired - Fee Related
-
1997
- 1997-04-28 TW TW085114022A patent/TW403788B/en active
Non-Patent Citations (1)
Title |
---|
See references of WO9719197A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR19990067543A (en) | 1999-08-25 |
ATE203778T1 (en) | 2001-08-15 |
CZ152598A3 (en) | 1999-05-12 |
AU7620696A (en) | 1997-06-11 |
EP0861337B1 (en) | 2001-08-01 |
PL326635A1 (en) | 1998-10-12 |
RU2159819C2 (en) | 2000-11-27 |
CN1067438C (en) | 2001-06-20 |
CZ294517B6 (en) | 2005-01-12 |
KR100287568B1 (en) | 2001-04-16 |
US6235084B1 (en) | 2001-05-22 |
JP2000500528A (en) | 2000-01-18 |
DE19680993D2 (en) | 1999-01-28 |
PL192625B1 (en) | 2006-11-30 |
CN1203634A (en) | 1998-12-30 |
DE59607427D1 (en) | 2001-09-06 |
WO1997019197A1 (en) | 1997-05-29 |
TW403788B (en) | 2000-09-01 |
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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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