EP2097505B1 - Method for producing pig-iron based stainless steel without using a supply of electrical energy - Google Patents
Method for producing pig-iron based stainless steel without using a supply of electrical energy Download PDFInfo
- Publication number
- EP2097505B1 EP2097505B1 EP07856191.7A EP07856191A EP2097505B1 EP 2097505 B1 EP2097505 B1 EP 2097505B1 EP 07856191 A EP07856191 A EP 07856191A EP 2097505 B1 EP2097505 B1 EP 2097505B1
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- EP
- European Patent Office
- Prior art keywords
- pig iron
- aod
- converter
- carried out
- twin
- Prior art date
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- 229910000805 Pig iron Inorganic materials 0.000 title claims description 33
- 229910001220 stainless steel Inorganic materials 0.000 title claims description 17
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 239000010935 stainless steel Substances 0.000 title claims description 15
- 238000000034 method Methods 0.000 claims description 40
- 238000011282 treatment Methods 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000005275 alloying Methods 0.000 claims description 11
- 238000007600 charging Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 9
- 238000009847 ladle furnace Methods 0.000 claims description 5
- 229910005347 FeSi Inorganic materials 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 229910000604 Ferrochrome Inorganic materials 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000002203 pretreatment Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 2
- 238000001311 chemical methods and process Methods 0.000 claims description 2
- 238000010079 rubber tapping Methods 0.000 claims 1
- 239000000161 steel melt Substances 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 238000005261 decarburization Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
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
-
- 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
- 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 for stainless steel production without electrical energy supply based on liquid pig iron and FeCr solids, wherein the liquid pig iron after a pre-treatment in the blast furnace and a DDD treatment (dephosphorization, desilication, desulfurization) heated in an AOD converter, ennobled 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
- the method is based on a running according to a process model and the metallurgical plant controlling computational technology, in the process model, the behavior for at least one variable process parameter between an actual process variable, a manipulated variable and describes a process end size.
- An example of the manufacturing process for AISI 304 grades is described.
- Stainless steels of the ferritic steel group AISI 4xx are conventionally produced in principle from typical scrap in the EAF and later additionally alloyed and decarburized in the AOD converter.
- pig iron pretreated in a steel mill is melted down Scrap and alloy outside the oven mixed in a pan and then charged into the converter.
- the object of the invention is that of the WO 2006/050963 A2 Known method with AOD technology for direct charging of pig iron and alloying in the converter for stainless steel production of all stainless steel, such as AISI 3xx, 4xx, 2xx, both austenitic and ferritic range using autogenous chemical energy to use.
- the stated object for the production of stainless steel number of said steel grade is achieved by the characterizing features of claim 1, characterized in that the stainless steel production of all stainless steel in both the austenitic and ferritic in the blast furnace pretreated slag-free liquid quantity of pig iron and separated into two classic "Twin" AOD In the first twin AOD-L converter, the required chemical process steps (the DDD treatment, charging and heating, decarburization and alloying) are carried out using parallel countercurrent flow using autogenous chemical energy First, the DDD treatment and in the second Twin AOD-L converter, first the decarburization is performed.
- 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.
- the first Twin AOD-L converter uses a 3- or 4-hole top lance and the second Twin AOD-L converter uses a single-hole top lance.
- 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 decarburization and alloying of the melt takes place in the first Twin AOD-L converter after completion of the DDD treatment and charging and heating, while in the second Twin AOD-L Converter after completion of the decarburization and all associated treatment steps (such as desulfurization and alloying with parting off) the pig iron is heated.
- the separation according to the invention of the pretreated slag-free molten pig iron quantity on two twin AOD-L converters arranged in parallel in the process line downstream of the blast furnace and the process steps carried out in a contrary manner makes it advantageously possible to produce all RST steel grades.
- 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 charged with the charged FeSi autogenous chemical energy is used.
- 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 In a drawing figure, an exemplary process line for the production of stainless steel is shown.
- the liquid quantity of pig iron is separated after its exit from the blast furnace 1 and introduced into two twin AOD-L converters 2, 3 arranged downstream of the blast furnace 1.
- the process steps are carried out in a contrary process, the DDD treatment and the refining and alloying of the molten pig iron.
- the molten steel from both Twin AOD-L converters is brought together in a ladle 4 and from there to the final adaptation / adjustment in the ladle furnace 5 and from there to the casting machine 6.
- FIG. 2 the contrary sequence of the process steps carried out in the Twin AOD-L converters 2 and 3 is shown. While in the Twin AOD-L converter 2 (on the left in the drawing) a DDD treatment V7 is started, followed by charging and heating V8 by FeSi followed by AOD treatment V9 with decarburization and alloying to produce, for example, AISI 3xx , 4xx, 2xx stainless steel grades, the DDD treatment V7 in the Twin AOD-L converter 3 (in the drawing on the right) with subsequent charging and heating V8 is only carried out after completion of the AOD treatment V9.
Description
Die Erfindung betrifft ein Verfahren zur Rostfreistahlerzeugung ohne elektrische Energiezufuhr auf der Basis von flüssigem Roheisen und FeCr-Feststoffen, wobei das flüssige Roheisen nach einer Vorbehandlung im Hochofen und einer DDD-Behandlung (Entphosphorung, Entsilizierung, Entschwefelung) in einem AOD-Konverter aufgeheizt, veredelt bzw. legiert, reduziert und abschließend eine Anpassung/Einstellung der behandelten Stahlschmelze in einem Pfannenofen durchgeführt wird.The invention relates to a method for stainless steel production without electrical energy supply based on liquid pig iron and FeCr solids, wherein the liquid pig iron after a pre-treatment in the blast furnace and a DDD treatment (dephosphorization, desilication, desulfurization) heated in an AOD converter, ennobled or alloyed, reduced and finally an adjustment / adjustment of the treated molten steel in a ladle furnace is performed.
Die Verwendung eines AOD-Konverters zur Herstellung von Edelstählen ist bereits bekannt. So wird in der
Rostfreistähle der ferritischen Stahlgruppe AISI 4xx werden konventionell prinzipiell aus arteigenem Schrott im EAF hergestellt und später dann im AOD Konverter zusätzlich legiert und entkohlt. Um die Anwendung von Roheisen hier zu nutzen, wird in einem Stahlwerk vorbehandeltes Roheisen mit eingeschmolzenem Schrott und Legierung außerhalb des Ofens in einer Pfanne vermischt und danach in den Konverter chargiert.Stainless steels of the ferritic steel group AISI 4xx are conventionally produced in principle from typical scrap in the EAF and later additionally alloyed and decarburized in the AOD converter. In order to use the use of pig iron here, pig iron pretreated in a steel mill is melted down Scrap and alloy outside the oven mixed in a pan and then charged into the converter.
In der
- Vorbehandlung des flüssigen Roheisens im Hochofen, DDD-Behandlung des Roheisens und Beschickung des AOD-Konverters mit schlackefreiem flüssigen Roheisen,
- Erhitzen, Veredlung/Legierung und Reduktion des flüssigen Roheisens im AOD-Konverter,
- abschließende Anpassung/Einstellung der behandelten Stahlschmelze in der Gießpfanne.
- Pre-treatment of the molten pig iron in the blast furnace, DDD treatment of the pig iron and charging of the AOD converter with slag-free liquid pig iron,
- Heating, refining / alloying and reduction of the molten pig iron in the AOD converter,
- final adjustment / adjustment of the treated molten steel in the ladle.
Mit Vorteil wird bei diesem bekannten Verfahren die Herstellung des Rostfreistahls durch den Einsatz des AOD-Konverters ohne den Einsatz eines EAF, also ohne Zufuhr von elektrischer Energie durchgeführt. Nachteilig ist bei diesem bekannten Verfahren allerdings, dass schließlich auf Grund eines Mangels an Energie mit diesem Verfahren nur die Herstellung von ferritischen Stählen möglich ist.Advantageously, in this known method, the production of the stainless steel by the use of the AOD converter without the use of an EAF, that is carried out without supply of electrical energy. A disadvantage of this known method, however, that finally due to a lack of energy with this method, only the production of ferritic steels is possible.
Ausgehend von diesem Stand der Technik besteht die Aufgabe der Erfindung darin, das aus der
Die gestellte Aufgabe zur Herstellung von Rostfreistahl der genannten Stahlgüte wird mit den kennzeichnenden Merkmalen des Anspruchs 1 dadurch gelöst, dass zur Rostfreistahlerzeugung aller Rostfreigüten sowohl im austenitischen als auch im ferritischen Bereich die im Hochofen vorbehandelte schlackefreie flüssige Roheisenmenge aufgetrennt und in zwei klassische "Twin" AOD-L Konverter eingebracht wird, in die dann mit parallelem konträren Ablauf die erforderlichen chemischen Prozessschritte (der DDD-Behandlung, des Chargierens und Heizens, des Entkohlens und Legierens) unter Verwendung von autogener chemischer Energie vorgenommen wird, wobei im ersten Twin AOD-L Konverter zunächst die DDD-Behandlung und im zweiten Twin AOD-L Konverter zunächst die Entkohlung durchgeführt wird.The stated object for the production of stainless steel number of said steel grade is achieved by the characterizing features of claim 1, characterized in that the stainless steel production of all stainless steel in both the austenitic and ferritic in the blast furnace pretreated slag-free liquid quantity of pig iron and separated into two classic "Twin" AOD In the first twin AOD-L converter, the required chemical process steps (the DDD treatment, charging and heating, decarburization and alloying) are carried out using parallel countercurrent flow using autogenous chemical energy First, the DDD treatment and in the second Twin AOD-L converter, first the decarburization is performed.
Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous embodiments of the invention are specified in the subclaims.
Nach dem Abschluss der DDD-Behandlung ist vor dem nachfolgenden Heizen ein Abschlacken des Roheisens erforderlich, da der typische AOD-Prozess schlackefrei starten soll. Damit wird auch die Effizienz der Lanze, die im zweiten AOD-L Konverter verwendet wird, vergrößert und eine freie Oberfläche der Schmelze für das Entweichen der Prozessgase gewährleistet.After completion of DDD treatment, prior to subsequent heating, slagging of the pig iron is required since the typical AOD process should start slag-free. Thus, the efficiency of the lance, which is used in the second AOD-L converter, increased and ensures a free surface of the melt for the escape of the process gases.
Das Heizen des Roheisens auf eine gewünschte bzw. für die nachfolgenden Prozessschritte erforderliche Temperatur erfolgt durch Si-Oxidation. Hierzu wird in den Twin AOD-L Konverter FeSi chargiert und Sauerstoff/Inertgas-Gemisch durch die Seitendüsen und eine Top-Lanze in und auf das Roheisen geblasen. Im ersten Twin AOD-L Konverter wird hierzu eine 3- bzw. 4-Loch-Toplanze und im zweiten Twin AOD-L Konverter eine Einloch-Toplanze eingesetzt.The heating of the pig iron to a desired or required for the subsequent process steps temperature is carried out by Si oxidation. For this purpose 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. The first Twin AOD-L converter uses a 3- or 4-hole top lance and the second Twin AOD-L converter uses a single-hole top lance.
Da das Heizen des Vormetalls erfindungsgemäß nach der DDD-Behandlung durchgeführt wird, ist es vor Allem möglich, Ni bzw. Ni-Legierungen in die Twin AOD-L Konverter zu chargieren. Die Bilanzenergie kann auf diese Weise beliebig gestaltet werden.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.
Durch den konträren Ablauf der in beiden Twin AOD-L Konvertern zu unterschiedlichen Zeitpunkten durchgeführten Prozessschritte erfolgt im ersten Twin AOD-L Konverter nach Abschluss der DDD-Behandlung und des Chargierens und Heizens das Entkohlen und Legieren der Schmelze, während im zweiten Twin AOD-L Konverter nach Abschluss der Entkohlung und aller dazu gehörenden Behandlungsschritte (wie z. B. Entschwefelung und Legieren samt Abstechen) das Roheisen aufgeheizt wird.Due to the contradictory sequence of the process steps carried out in both Twin AOD-L converters at different times, the decarburization and alloying of the melt takes place in the first Twin AOD-L converter after completion of the DDD treatment and charging and heating, while in the second Twin AOD-L Converter after completion of the decarburization and all associated treatment steps (such as desulfurization and alloying with parting off) the pig iron is heated.
Durch die erfindungsgemäße Auftrennung der vorbehandelten schlackefreien flüssigen Roheisenmenge auf zwei in der Prozesslinie nach dem Hochofen parallel angeordnete Twin AOD-L Konverter sowie der dort konträr durchgeführten Prozessschritte wird mit Vorteil die Erzeugung aller RST-Stahlqualitäten ermöglicht. Gleichzeitig findet eine Abkoppelung des Bedarfs an elektrischer Energie für alle Qualitäten statt, da als Energieträger ausschließlich die bereits im Roheisen vorhandene bzw. über die mit dem chargierten FeSi eingebrachte autogene chemische Energie verwendet wird. Weiterhin werden durch diese Auftrennung der Roheisenmenge und der Prozessführung eine zuverlässigere Temperaturführung, verminderte Prozesskosten sowie verminderte Investitionskosten erreicht, da jeweils nur kleinere Roheisenmengen behandelt werden müssen.The separation according to the invention of the pretreated slag-free molten pig iron quantity on two twin AOD-L converters arranged in parallel in the process line downstream of the blast furnace and the process steps carried out in a contrary manner makes it advantageously possible to produce all RST steel grades. At the same time, 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 charged with the charged FeSi autogenous chemical energy is used. Furthermore, 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.
Nachfolgend wird das Verfahren der Erfindung in schematischen Zeichnungsfiguren näher erläutert.The method of the invention is explained in more detail in schematic drawing figures.
Es zeigen:
- Fig. 1
- eine beispielhafte Verfahrenslinie,
- Fig. 2
- den konträren Verfahrensablauf in zwei Twin AOD-L Konvertern.
- Fig. 1
- an exemplary process line,
- Fig. 2
- the contrary procedure in two Twin AOD-L converters.
In der
In der
Durch die gewählte Darstellungsform der
Daraus folgt, dass die DDD-Behandlung und das Chargieren und Heizen im Konverter 2 mit der AOD-L-Behandlung im Konverter 3 und umgekehrt die DDD-Behandlung und das Chargieren und Heizen im Konverter 3 mit der AOD-L-Behandlung im Konverter 2 synchronisiert ist.It follows that the DDD treatment and the charging and heating in the
- 11
- Hochofen / Blast Furnace / BFBlast Furnace / Blast Furnace / BF
- 2, 32, 3
- Twin AOD-L KonverterTwin AOD-L converter
- 44
- Pfanne / Charging Ladle / CLPan / Charging Ladle / CL
- 55
- Pfannenofen / Ladle Furnace / LFLadle Furnace / Ladle Furnace / LF
- 66
- Gießmaschine / Continuous Casting Machine / CCM VerfahrensschritteCasting Machine / Continuous Casting Machine / CCM Process Steps
- V7V7
- DDD-BehandlungDDD treatment
- V8V8
- Chargieren und Heizen des vorbehandelten RoheisensCharging and heating of the pre-treated pig iron
- V9V9
- Entkohlen und Legieren (AOD-Behandlung)Decarburization and alloying (AOD treatment)
Claims (8)
- Method for stainless steel production, without electrical energy supply, on the basis of liquid pig iron and FeCr solids, wherein the liquid pig iron after pre-treatment in a blast furnace (1) and a DDD treatment (dephosphorisation, desiliconisation, desulphurisation) is in an AOD converter (2, 3) heated, refined or alloyed, reduced and subsequently an adaptation/setting of the treated steel melt is carried out in a ladle furnace (5), characterised in that for stainless steel production of all stainless qualities not only in the austenitic, but also in the ferritic range the slag-free liquid pig iron quantity pre-treated in the blast furnace is separated and introduced into two classic 'twin' AOD-L converters (2, 3), in which by parallel contrary sequence the required chemical process steps (the DDD treatment (V7), the heating (V8) and the decarbonising and alloying (V9)) are then carried out with use of autogenic chemical energy, wherein the DDD treatment (V7) is initially carried out in the first twin AOD-L converter (2) and the decarbonisation (V9) is initially carried out in the second twin AOD-L converter (3).
- Method according to claim 1, characterised in that after the conclusion of the DDD treatment (V7) a deslagging of the pig iron is carried out prior to subsequent charging and heating (V8).
- Method according to claim 2, characterised in that an Si oxidation is carried out for heating (V8) the pig iron, for which purpose the pig iron is charged with FeSi.
- Method according to claim 3, characterised in that the decarbonisation and alloying (V9) of the melt is carried out in the first twin AOD-L converter (2) after the conclusion of the DDD treatment (V7) and the heating (V8).
- Method according to claim 4, characterised in that an oxygen/inert-gas mixture is injected into and onto the pig iron through lateral nozzles and a top lance (3-hole or 4-hole top lance) in the first twin AOD-L converter (2) for the Si oxidation.
- Method according to claim 3, characterised in that the pig iron is charged and heated in the second twin AOD-L converter (3) after the conclusion of the decarbonisation (V9) and all treatment steps connected therewith (such as, for example, desulphurisation and alloying inclusive of tapping).
- Method according to claim 6, characterised in that an oxygen/inert-gas mixture is injected into and onto the pig iron through lateral nozzles and a top lance (1-hole or 3-hole top lance) in the second twin AOD-L converter (3) for the Si oxidation.
- Method according to one of more of claims 1 to 7, characterised in that in each instance the same pig iron quantities are introduced into the two twin AOD-L converters (2, 3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006056672A DE102006056672A1 (en) | 2006-11-30 | 2006-11-30 | Method and apparatus for stainless steel production without electrical energy supply based on pig iron |
| PCT/EP2007/010012 WO2008064797A1 (en) | 2006-11-30 | 2007-11-20 | Method and device for producing pig-iron based stainless steel without using a supply of electrical energy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2097505A1 EP2097505A1 (en) | 2009-09-09 |
| EP2097505B1 true EP2097505B1 (en) | 2016-08-10 |
Family
ID=39032113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07856191.7A Active EP2097505B1 (en) | 2006-11-30 | 2007-11-20 | Method for producing pig-iron based stainless steel without using a supply of electrical energy |
Country Status (9)
| Country | Link |
|---|---|
| US (2) | US8430945B2 (en) |
| EP (1) | EP2097505B1 (en) |
| JP (1) | JP5415275B2 (en) |
| KR (1) | KR101123038B1 (en) |
| CN (1) | CN101541941B (en) |
| CA (1) | CA2671074C (en) |
| DE (1) | DE102006056672A1 (en) |
| ES (1) | ES2602303T3 (en) |
| WO (1) | WO2008064797A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006056671A1 (en) * | 2006-11-30 | 2008-06-05 | Sms Demag Ag | Method and apparatus for stainless steel production without electrical energy supply on the basis of pig iron pretreated in a DDD plant |
| DE102014222727A1 (en) * | 2014-11-06 | 2016-05-12 | Sms Group Gmbh | Method and device for producing a stainless steel |
| CN110894565B (en) * | 2019-12-04 | 2021-07-16 | 山西太钢不锈钢股份有限公司 | Method for smelting stainless steel by using ultrahigh silicon, carbon and chromium solution |
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| AT263830B (en) * | 1965-02-11 | 1968-08-12 | Bot Brassert Oxygen Technik Ag | Plant for the production of steel |
| SE329861B (en) | 1969-03-26 | 1970-10-26 | Skf Svenska Kullagerfab Ab | |
| DE1940761C3 (en) * | 1969-08-11 | 1973-02-01 | Demag Ag | Plant for continuous steel production |
| JPS59107016A (en) * | 1982-12-11 | 1984-06-21 | Nisshin Steel Co Ltd | Method for obtaining molten metal containing ni for manufacturing stainless steel |
| JPS59182909A (en) * | 1983-03-31 | 1984-10-17 | Nippon Steel Corp | Lance for refining in steel making |
| JPS59211519A (en) * | 1983-05-18 | 1984-11-30 | Nisshin Steel Co Ltd | Production of low p-containing chromium steel |
| JPS6112812A (en) * | 1984-06-27 | 1986-01-21 | Sumitomo Metal Ind Ltd | Method for decarburizing stainless steel |
| JPH04224617A (en) * | 1990-12-26 | 1992-08-13 | Kawasaki Steel Corp | Production of stainless steel by cr ore smelting reduction |
| JP2848010B2 (en) * | 1991-04-23 | 1999-01-20 | 住友金属工業株式会社 | Top blowing lance for refining molten metal |
| JPH0892614A (en) * | 1994-09-27 | 1996-04-09 | Kawasaki Steel Corp | Pretreatment of molten iron by discharging low basicity slag |
| DE19621143A1 (en) * | 1996-01-31 | 1997-08-07 | Mannesmann Ag | Process for the production of stainless steels |
| JPH09302405A (en) * | 1996-05-15 | 1997-11-25 | Kawasaki Steel Corp | Method for melting stainless steel |
| JPH11131122A (en) * | 1997-10-28 | 1999-05-18 | Nippon Steel Corp | Method of decarburizing refining crude molten stainless steel using blast furnace molten iron and ferro chromium alloy |
| ITRM20010146A1 (en) | 2001-03-21 | 2002-09-21 | Acciai Speciali Terni Spa | METHOD AND CONTROL SYSTEM FOR AOD CONVERTERS. |
| AT411068B (en) | 2001-11-13 | 2003-09-25 | Voest Alpine Ind Anlagen | METHOD FOR PRODUCING A METAL MELT IN A LODGE TECHNICAL PLANT |
| GB0213027D0 (en) * | 2002-06-07 | 2002-07-17 | Jsr Farming Group | Compound |
| DE10227031A1 (en) * | 2002-06-17 | 2004-01-08 | Sms Demag Ag | Process and production plant for producing products from carbon steel or from stainless steel |
| DE102005032929A1 (en) * | 2004-11-12 | 2006-05-18 | Sms Demag Ag | Production of stainless steel of the ferritic steel group AISI 4xx in an AOD converter |
| DE102006056671A1 (en) * | 2006-11-30 | 2008-06-05 | Sms Demag Ag | Method and apparatus for stainless steel production without electrical energy supply on the basis of pig iron pretreated in a DDD plant |
-
2006
- 2006-11-30 DE DE102006056672A patent/DE102006056672A1/en not_active Withdrawn
-
2007
- 2007-11-20 WO PCT/EP2007/010012 patent/WO2008064797A1/en active Application Filing
- 2007-11-20 EP EP07856191.7A patent/EP2097505B1/en active Active
- 2007-11-20 CN CN200780043801.4A patent/CN101541941B/en not_active Expired - Fee Related
- 2007-11-20 JP JP2009538619A patent/JP5415275B2/en not_active Expired - Fee Related
- 2007-11-20 KR KR1020097008208A patent/KR101123038B1/en active IP Right Grant
- 2007-11-20 ES ES07856191.7T patent/ES2602303T3/en active Active
- 2007-11-20 US US12/312,882 patent/US8430945B2/en active Active
- 2007-11-20 CA CA2671074A patent/CA2671074C/en not_active Expired - Fee Related
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2012
- 2012-03-23 US US13/428,854 patent/US8765051B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| US8765051B2 (en) | 2014-07-01 |
| JP2010511100A (en) | 2010-04-08 |
| KR20090060353A (en) | 2009-06-11 |
| WO2008064797A1 (en) | 2008-06-05 |
| US20120175828A1 (en) | 2012-07-12 |
| KR101123038B1 (en) | 2012-03-21 |
| EP2097505A1 (en) | 2009-09-09 |
| US20100011909A1 (en) | 2010-01-21 |
| JP5415275B2 (en) | 2014-02-12 |
| DE102006056672A1 (en) | 2008-06-05 |
| CA2671074A1 (en) | 2008-06-05 |
| US8430945B2 (en) | 2013-04-30 |
| ES2602303T3 (en) | 2017-02-20 |
| CN101541941A (en) | 2009-09-23 |
| CN101541941B (en) | 2014-08-13 |
| CA2671074C (en) | 2011-09-20 |
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