EP2097543A1 - Verfahren und vorrichtung zur rostfreistahlerzeugung ohne elektrische energiezufuhr auf der basis von in einer ddd-anlage vorbehandeltem roheisen - Google Patents
Verfahren und vorrichtung zur rostfreistahlerzeugung ohne elektrische energiezufuhr auf der basis von in einer ddd-anlage vorbehandeltem roheisenInfo
- Publication number
- EP2097543A1 EP2097543A1 EP07856192A EP07856192A EP2097543A1 EP 2097543 A1 EP2097543 A1 EP 2097543A1 EP 07856192 A EP07856192 A EP 07856192A EP 07856192 A EP07856192 A EP 07856192A EP 2097543 A1 EP2097543 A1 EP 2097543A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- aod
- converter
- pig iron
- twin
- ddd
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/005—Manufacture of stainless steel
-
- 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
-
- 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
- C21C7/06—Deoxidising, e.g. killing
-
- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/068—Decarburising
- C21C7/0685—Decarburising of stainless steel
-
- 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
- C21C2300/00—Process aspects
- C21C2300/08—Particular sequence of the process steps
Definitions
- the invention relates to a method and a device for stainless steel production without electrical energy supply based on liquid pig iron and FeCr solids, the liquid pig iron after a pretreatment in the blast furnace and a DDD treatment (dephosphorization, desilication, desulfurization) in a DDD -Vorraum then heated in an AOD converter, refined or alloyed, reduced and finally an adjustment / adjustment of the treated molten steel in a ladle furnace is performed.
- a DDD treatment dephosphorization, desilication, desulfurization
- Stainless steels of the ferritic steel group AISI 4xx are conventionally produced in principle from arti- cious scrap in the EAF and later additionally alloyed and decarburized in the AOD converter.
- pig iron here too use, in a steel mill pretreated pig iron is mixed with molten scrap and alloy outside the furnace in a pan and then charged into the converter.
- the object of the invention is the method known from WO 2006/050963 A2 with AOD technology for direct charging of the pig iron and alloying in the converter for stainless steel production of all stainless steel in both the austenitic and in the ferritic range using autogenous chemical energy.
- the heating of the pig iron to a desired or required for the subsequent process steps temperature is carried out by Si oxidation.
- FeSi is charged into the Twin AOD-L converter and oxygen / inert gas mixture is blown through the side nozzles and a top lance into and onto the pig iron.
- a 3- or 4-hole top lance known from BOF blast technology (treatment of C steels) and in the second Twin AOD-L converter a typical one-hole lance for the AOD process used. Since the heating of the pre-metal is carried out according to the invention after the DDD treatment, it is possible, above all, to charge Ni or Ni alloys into the Twin AOD-L converters. The balance energy can be designed in this way.
- the first Twin AOD-L converter after the completion of heating, the decarburization and alloying of the melt, while in the second Twin AOD-L converter after completion of the classical decarburization and all the associated treatment steps (such as desulfurization and alloying, including parting off), the pig iron is charged and heated.
- the inventive separation of the pretreated slag-free molten pig iron quantity on two in the process line after the blast furnace and the DDD device arranged in parallel Twin AOD-L converter and the process steps performed there contrary advantage the production of all RST steel grades is possible.
- there is a decoupling of the demand for electrical energy for all qualities since only the energy already present in the pig iron or via the autogenous chemical energy introduced with the charged FeSi is used as the energy source.
- a more reliable temperature control, reduced process costs and reduced investment costs are achieved by this separation of the amount of pig iron and the process control, since only smaller quantities of pig iron have to be treated.
- FIG. 1 shows an exemplary method line
- Fig. 2 shows the contrary procedure in two Twin AOD-L converters.
- FIG 1 an exemplary method line for the production of stainless steel is shown in a drawing figure.
- the liquid quantity of pig iron is separated after its exit from the blast furnace 1 and a DDD treatment in a DDD device 2 and introduced into two parallel twin AOD-L converters 3, 4.
- a temperature increase due to Si oxidation and the refining and alloying of the molten pig iron takes place in a contrary sequence of the process steps.
- the molten steel from both Twin AOD-L converters 3, 4 is brought together in a ladle 5 and from there for final adaptation / adjustment in the ladle furnace 6 and the casting machine 7.
- FIG. 2 shows the contrary sequence of the process steps carried out in the twin AOD-L converters 3 and 4. While in the twin AOD-L converter 3 (in the drawing on the left) a charging and heating V8 of the pig iron pretreated in the blast furnace 1 and a DDD device 2 is started, with subsequent AOD treatment V9 with decarburization and alloying for the production of, for example, AISI 3xx, 4xx, 2xx stainless steel grades, the AOD treatment V9 is first carried out in the twin AOD-L converter 4 (in the drawing on the right) and only then is the charging and heating V8 of the pig iron.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Carbon Steel Or Casting Steel Manufacturing (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)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006056671A DE102006056671A1 (de) | 2006-11-30 | 2006-11-30 | Verfahren und Vorrichtung zur Rostfreistahlerzeugung ohne elektrische Energiezufuhr auf der Basis von in einer DDD-Anlage vorbehandeltem Roheisen |
| PCT/EP2007/010013 WO2008064798A1 (de) | 2006-11-30 | 2007-11-20 | Verfahren und vorrichtung zur rostfreistahlerzeugung ohne elektrische energiezufuhr auf der basis von in einer ddd-anlage vorbehandeltem roheisen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2097543A1 true EP2097543A1 (de) | 2009-09-09 |
| EP2097543B1 EP2097543B1 (de) | 2016-08-17 |
Family
ID=39030860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07856192.5A Active EP2097543B1 (de) | 2006-11-30 | 2007-11-20 | Verfahren zur rostfreistahlerzeugung ohne elektrische energiezufuhr auf der basis von in einer ddd-anlage vorbehandeltem roheisen |
Country Status (8)
| Country | Link |
|---|---|
| US (2) | US8048196B2 (de) |
| EP (1) | EP2097543B1 (de) |
| JP (1) | JP5111514B2 (de) |
| KR (1) | KR101123035B1 (de) |
| CN (1) | CN101541981B (de) |
| CA (1) | CA2671148C (de) |
| DE (1) | DE102006056671A1 (de) |
| WO (1) | WO2008064798A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006056672A1 (de) * | 2006-11-30 | 2008-06-05 | Sms Demag Ag | Verfahren und Vorrichtung zur Rostfreistahlerzeugung ohne elektrische Energiezufuhr auf der Basis von Roheisen |
| CN102162019B (zh) * | 2011-04-06 | 2012-11-21 | 河北钢铁股份有限公司承德分公司 | 一种含钒铁水多段组合式预处理的方法 |
| WO2015073933A1 (en) * | 2013-11-15 | 2015-05-21 | University Of Utah Research Foundation | Nanoparticle light filtering method and apparatus |
| DE102014222727A1 (de) | 2014-11-06 | 2016-05-12 | Sms Group Gmbh | Verfahren und Vorrichtung zur Erzeugung eines Rostfreistahls |
| CN117210635B (zh) * | 2023-10-24 | 2026-03-24 | 甘肃酒钢集团宏兴钢铁股份有限公司 | 一种21Mn23AlSiMoV高锰耐热钢的AOD转炉冶炼工艺 |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1176683B (de) | 1962-03-27 | 1964-08-27 | Kloeckner Werke Ag | Siemens-Martin-Ofen und Verfahren zur Stahlherstellung unter Verwendung dieses Ofens |
| AT263830B (de) * | 1965-02-11 | 1968-08-12 | Bot Brassert Oxygen Technik Ag | Anlage zur Erzeugung von Stahl |
| SE329861B (de) | 1969-03-26 | 1970-10-26 | Skf Svenska Kullagerfab Ab | |
| JPS5760012A (en) | 1980-09-26 | 1982-04-10 | Sumitomo Metal Ind Ltd | Production of extremely low nitrogen stainless steel |
| JPS59182909A (ja) * | 1983-03-31 | 1984-10-17 | Nippon Steel Corp | 製鋼精錬用ランス |
| JPS59211519A (ja) * | 1983-05-18 | 1984-11-30 | Nisshin Steel Co Ltd | 低p含クロム鋼の製造法 |
| JPS63195209A (ja) * | 1987-02-07 | 1988-08-12 | Sumitomo Metal Ind Ltd | 製鋼方法 |
| JPH0892614A (ja) * | 1994-09-27 | 1996-04-09 | Kawasaki Steel Corp | 低塩基度スラグを排滓する溶銑予備処理方法 |
| DE19621143A1 (de) * | 1996-01-31 | 1997-08-07 | Mannesmann Ag | Verfahren zur Erzeugung nichtrostender Stähle |
| JPH11131122A (ja) * | 1997-10-28 | 1999-05-18 | Nippon Steel Corp | 高炉溶銑とフェロクロム合金を用いたステンレス粗溶鋼の脱炭精錬方法 |
| JP4210011B2 (ja) * | 1999-11-10 | 2009-01-14 | 新日本製鐵株式会社 | 転炉を用いた溶銑の脱燐方法 |
| ITRM20010146A1 (it) | 2001-03-21 | 2002-09-21 | Acciai Speciali Terni Spa | Metodo e sistema di controllo per convertitori aod. |
| AT411068B (de) | 2001-11-13 | 2003-09-25 | Voest Alpine Ind Anlagen | Verfahren zur herstellung einer metallschmelze in einer hüttentechnischen anlage |
| DE10227031A1 (de) * | 2002-06-17 | 2004-01-08 | Sms Demag Ag | Verfahren und Produktionsanlage zum Erzeugen von Produkten aus C-Stahl oder aus Rostfrei-Stahl |
| CN1189575C (zh) * | 2003-07-04 | 2005-02-16 | 钢铁研究总院 | 一种转炉炼钢方法 |
| DE102005032929A1 (de) * | 2004-11-12 | 2006-05-18 | Sms Demag Ag | Herstellung von Rostfreistahl der ferritischen Stahlgruppe AISI 4xx in einem AOD-Konverter |
| UA82962C2 (en) * | 2005-12-02 | 2008-05-26 | Sms Demag Ag | Method and smelting unit for obtaining steel with high manganese and low carbon content |
| DE102006056672A1 (de) * | 2006-11-30 | 2008-06-05 | Sms Demag Ag | Verfahren und Vorrichtung zur Rostfreistahlerzeugung ohne elektrische Energiezufuhr auf der Basis von Roheisen |
-
2006
- 2006-11-30 DE DE102006056671A patent/DE102006056671A1/de not_active Withdrawn
-
2007
- 2007-11-20 EP EP07856192.5A patent/EP2097543B1/de active Active
- 2007-11-20 CA CA2671148A patent/CA2671148C/en not_active Expired - Fee Related
- 2007-11-20 WO PCT/EP2007/010013 patent/WO2008064798A1/de not_active Ceased
- 2007-11-20 JP JP2009538620A patent/JP5111514B2/ja not_active Expired - Fee Related
- 2007-11-20 US US12/312,888 patent/US8048196B2/en active Active
- 2007-11-20 KR KR1020097008207A patent/KR101123035B1/ko not_active Expired - Fee Related
- 2007-11-20 CN CN2007800438457A patent/CN101541981B/zh not_active Expired - Fee Related
-
2011
- 2011-05-31 US US13/118,768 patent/US8425831B2/en active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008064798A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2671148A1 (en) | 2008-06-05 |
| JP5111514B2 (ja) | 2013-01-09 |
| WO2008064798A1 (de) | 2008-06-05 |
| JP2010511101A (ja) | 2010-04-08 |
| EP2097543B1 (de) | 2016-08-17 |
| US8048196B2 (en) | 2011-11-01 |
| KR101123035B1 (ko) | 2012-03-21 |
| DE102006056671A1 (de) | 2008-06-05 |
| US20110227263A1 (en) | 2011-09-22 |
| CN101541981A (zh) | 2009-09-23 |
| KR20090055045A (ko) | 2009-06-01 |
| CN101541981B (zh) | 2012-06-27 |
| CA2671148C (en) | 2012-03-27 |
| US20100024600A1 (en) | 2010-02-04 |
| US8425831B2 (en) | 2013-04-23 |
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