EP3018219A1 - Procede et dispositif de generation d'un acier inoxydable - Google Patents
Procede et dispositif de generation d'un acier inoxydable Download PDFInfo
- Publication number
- EP3018219A1 EP3018219A1 EP15191347.2A EP15191347A EP3018219A1 EP 3018219 A1 EP3018219 A1 EP 3018219A1 EP 15191347 A EP15191347 A EP 15191347A EP 3018219 A1 EP3018219 A1 EP 3018219A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- converter
- molten iron
- stainless steel
- chromium
- molten
- 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
- 238000000034 method Methods 0.000 title claims abstract description 63
- 229910000831 Steel Inorganic materials 0.000 title description 7
- 239000010959 steel Substances 0.000 title description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 154
- 229910052742 iron Inorganic materials 0.000 claims abstract description 72
- 239000011651 chromium Substances 0.000 claims abstract description 42
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 40
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 33
- 239000010935 stainless steel Substances 0.000 claims abstract description 28
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 26
- 239000011574 phosphorus Substances 0.000 claims abstract description 26
- 238000007670 refining Methods 0.000 claims abstract description 25
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 18
- 238000005261 decarburization Methods 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 12
- 239000000956 alloy Substances 0.000 claims abstract description 12
- 229910000604 Ferrochrome Inorganic materials 0.000 claims abstract description 11
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims abstract description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 17
- 229910000805 Pig iron Inorganic materials 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 239000002826 coolant Substances 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-UHFFFAOYSA-N 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims description 4
- 238000005275 alloying Methods 0.000 claims description 3
- 229910002555 FeNi Inorganic materials 0.000 claims 1
- 238000007664 blowing Methods 0.000 description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000010079 rubber tapping Methods 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229910001021 Ferroalloy Inorganic materials 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000009847 ladle furnace Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- 229910000863 Ferronickel Inorganic materials 0.000 description 1
- 229910001356 Nickel pig iron Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- QVMHUALAQYRRBM-UHFFFAOYSA-N [P].[P] Chemical compound [P].[P] QVMHUALAQYRRBM-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000161 steel melt Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 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
- 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
- C21C5/36—Processes yielding slags of special composition
-
- 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
- C21C7/064—Dephosphorising; Desulfurising
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
-
- 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 is directed to a method for producing an austenitic or ferritic stainless steel from a first, in particular highly carbon-containing molten iron supplied to a converter designed for a metallurgical refining. Furthermore, the invention is directed to an apparatus for performing such a method in a converter.
- the invention has for its object to provide a solution that allows the production of a stainless steel melt based on a high phosphorus raw or feed molten iron melt in an energy efficient manner as part of a refining process in the production of stainless steel melt production facilities, especially converters.
- this object is achieved in that the first molten iron in the converter in a first treatment stage of a dephosphorization, desilication and decarburization with subsequent intermediate Schlackenabstich is subjected to phosphorus removal and then the metallurgical treated first molten iron in the converter in a second treatment stage a sufficient chromium-containing chromium-containing iron chromium (FeCr) alloy supplied as a second molten iron to produce the stainless steel and from the resulting mixture of iron melts by metallurgical refining a stainless steel melt is produced.
- FeCr iron chromium
- this object is achieved in that the converter is part of a twin-converter system, both converters, in particular AOD (argon oxygen decarburization) - or AOD-L (lance) - or MRP (Metal Refining process) - or MRP-L (lance) converters, designed to simultaneously carry out the process.
- AOD argon oxygen decarburization
- AOD-L (lance) or AOD-L (lance) - or MRP (Metal Refining process) - or MRP-L (lance) converters
- twin-converter system for carrying out the method according to the invention is advantageous because the two-stage, the first treatment stage and the second treatment stage comprehensive fresh process takes longer than a conventional refining process.
- the invention proposes to carry out the refining process in a converter, but in two successive, different treatment stages.
- the first generated in an upstream first melting unit Iron melt is fed to the converter and then treated, in particular in the context of a dephosphorization, desilication and decarburization treatment carried out by subjecting the first molten iron to a treatment gas in the first treatment stage of the refining process.
- an intermediate Schlackenabstich to remove the passed over in the above freshness treatment in the phosphorus phosphorus.
- a molten iron chromium (FeCr) alloy is added as a second molten iron in the remaining in the converter first molten iron in a second treatment stage, which provides the necessary for the production of stainless steel high nickel content.
- the iron melt now formed in the converter is then subjected in the usual way to a metallurgical refining under the action of treatment gas so that the desired stainless steel melt is present at the end. This can then be treated as usual in subsequent secondary metallurgical treatment stages and further processed before it is then cast, for example, as part of a continuous casting process.
- the invention provides for a split of the freshness process, wherein the first part in the first treatment stage, the Entphosphorungs-, desilication and decarburization treatment of the still little chromium-containing and not high chromium enriched first molten iron provides, and only in the subsequent second treatment stage by the supply the molten iron chromium (FeCr) alloy is supplied to the increased chromium content necessary for the production of the stainless steel, the use of harnessphosphor successionm material to produce the molten iron melted and melted in a previous step is possible.
- the previous melting unit in which the first molten iron to be used is produced, is also a blast furnace.
- this may also be an electric arc furnace.
- the invention is characterized in that the generation of the stainless steel melt in the converter is carried out without supplying electrical energy to the first molten iron.
- the converters in which the process according to the invention can be carried out are conventional containers used in the refining of molten iron, namely AOD or MRP containers.
- the invention is therefore further characterized in that the first treatment stage and the second treatment stage in an AOD (argon oxygen decarburization) or AOD-L (lance) or MRP (metal refining process) or MRP-L (lance). Converters are performed.
- the converter for producing an austenitic stainless steel as the first molten iron in particular high, phosphorus-containing pig iron or a Nickelroheisen or a molten FeNi alloy is supplied, thereby the invention features in a further embodiment.
- the converter to produce a ferritic stainless steel first Iron melt is supplied to a nickel-free pig iron, whereby the invention is also distinguished in design.
- An iron melt supplied to the converter as the first melt advantageously has a chromium content of only up to 5% by weight so as not to impair the dephosphorization treatment provided in the first treatment step.
- the invention is therefore characterized in another embodiment also in that the converter as the first molten iron melt with a content between 0 wt .-% and 25 wt .-% nickel (Ni), a content of up to 5 wt .-% Chromium (Cr) and high levels of carbon (C), phosphorus (P) and silicon (Si) is supplied.
- the converter is then fed as a second molten iron, a high chromium containing, for example, 60-65 wt .-% chromium-containing molten iron chromium (FeCr) alloy as a second molten iron, which is also characterized by a low phosphorus content of ⁇ 0.05 wt .-%, in particular ⁇ 0.04 wt .-%, phosphorus.
- a high chromium containing, for example, 60-65 wt .-% chromium-containing molten iron chromium (FeCr) alloy as a second molten iron, which is also characterized by a low phosphorus content of ⁇ 0.05 wt .-%, in particular ⁇ 0.04 wt .-%, phosphorus.
- the invention is therefore in an advantageous embodiment further characterized in that the converter as a second molten iron, a molten iron chromium (FeCr) alloy containing more than 50 wt .-% chromium (Cr), in particular between 60 and 65 wt .-% Chromium (Cr), and a low phosphorus content is supplied.
- the converter as a second molten iron, a molten iron chromium (FeCr) alloy containing more than 50 wt .-% chromium (Cr), in particular between 60 and 65 wt .-% Chromium (Cr), and a low phosphorus content is supplied.
- cooling agents and / or alloying agents and / or slag formations and / or reducing agents can then be supplied in freshly customary amount and manner of the resulting molten iron or crude steel melt, which the invention also provides.
- the stainless steel melt produced in the converter with completion of the second treatment stage can then be further treated in the usual way.
- the invention provides in an advantageous embodiment that the stainless steel melt produced in the converter by means of metallurgical refinement is fed to a ladle and / or a subsequent secondary metallurgical treatment.
- the melting in the blast furnace offers itself.
- the invention therefore also provides, in a further embodiment, for the converter to be supplied with a molten pig iron melted in a blast furnace as the first molten iron.
- the inventive method is characterized in that it is carried out in each case, in particular an AOD or AOD-L converter, but two of these converters are operated in particular simultaneously with the inventive method.
- the high-carbon-containing first molten iron molten in an upstream melting unit is decarburized, dephosphorized and desilvered in the respective converter and, in particular, brought to the desired final contents.
- a chromium-containing, molten iron chromium (FeCr) alloy of the first iron melt located in the converter is added and in the context of a second treatment stage of the refining process with the addition of further treatment agents such as coolant and / or alloying agent and / or slag and / or reducing agent to the desired stainless steel melt processed.
- the invention is explained in more detail below by way of example with reference to a drawing.
- a primary melting unit 1 in which a high-carbon raw material or feedstock, a first high-carbon-containing molten iron 2 is melted.
- the first molten iron 2 is a high-phosphorus pig iron melt, molten nickel pig iron or ferro-nickel molten pig iron which, for example in the embodiment described here, has a composition of approximately 3% by weight carbon (C), approximately 2% by weight silicon (Si ), more than 0.05% by weight of phosphorus (P), 0-25% by weight of nickel (Ni), less than 2.5% by weight of chromium (Cr) and iron as the remainder.
- C carbon
- Si silicon
- P phosphorus
- Ni nickel
- Cr chromium
- This first molten iron 2 is fed at a temperature of about 1500 ° C one or both AOD converters 3 of the twin converter system 4.
- the temperature of the first molten iron during transport in a pan is so high that covered during transport to the AOD converter 3 temperature loss is covered, taken into account and compensated.
- the first molten iron 2 is now subjected to a dephosphorization, desilication and decarburization treatment in a first treatment stage.
- a dephosphorization, desilication and decarburization treatment in a first treatment stage.
- the initial carbon content of the first molten iron 2 is reduced to a value of ⁇ 0.1% by weight.
- phosphorus is removed from the treated first molten iron 2 after completion of the blowing process of the first treatment stage via a subsequent intermediate slag tap. If it should be necessary due to a high silicon content, another intermediate Schlackenabstich during the blowing process of the first Treatment level to be performed.
- the first molten iron 2 used in the exemplary embodiment in the respective AOD converter 3 then has the following composition: less than 0.05% by weight of carbon (C), less than 0.02% by weight of silicon (Si ), less than 0.02% by weight of phosphorus (P), 0-25% by weight of nickel (Ni), less than 0.5% by weight of chromium (Cr) and iron (Fe) as the remainder.
- coolant and / or slag images can be supplied in the usual way.
- the second molten iron 6 has the following composition in the embodiment: about 3 wt% carbon (C), about 5 wt% silicon (Si), less than 0.04 wt% phosphorus (P), 60
- the second molten iron 6 has a temperature of 1500 ° C, with which they the respective AOD converter 3, after after the first treatment stage or as Completed the end of the first treatment stage the slag or the Schlackeabstich has been performed is supplied.
- the total mixture is brought in a blowing step with a high oxygen / nitrogen ratio by gas to a carbon content of 0.7 wt .-%.
- the temperature rises relatively quickly to a high operating temperature, which prevents chromium slagging, ie the chromium oxidation losses are kept low at this temperature.
- coolants such as high-carbon ferroalloys are added to the molten bath so that the temperature can be maintained at the desired high level.
- a condition for this is that a large amount of refrigerant is supplied to the converter from a bunker.
- the combined blowing process is performed without interruption, however different gas compositions between individual blowing steps can be used.
- Decarburization is carried out until a final carbon content of about 0.03 to 0.05 weight percent carbon is achieved.
- the temperatures and the carbon content are measured and tested, since these values are the blowing time of each step with different proportions of oxygen and inert gas depends.
- nitrogen or argon is used for rinsing.
- a reduction phase is necessary. By adding reducing agents with simultaneous argon purging or stirring, high levels of chromium in the slag can be recycled back into the molten iron or molten steel.
- a stainless steel melt 7 is then obtained in the embodiment, the content of ⁇ 0.05 wt .-% carbon (C), about 0.4 wt .-% silicon (Si), less than 0.04 Wt .-% phosphorus (P), about 8 to 12 wt .-% nickel (Ni), about 16 to 24 wt .-% chromium (Cr), and iron (Fe) as the remaining portion.
- the obtained stainless steel melt 7 is then tapped into a ladle 8 at a temperature of about 1650 ° C and fed with this a ladle furnace 9, in which the stainless steel melt 7 a secondary metallurgical treatment is subjected before it is then cast in a casting plant 10, in particular a continuous casting plant.
- the time from tapping to tapping is approximately 120 minutes for each of the two AOD converters 3.
- the example described above relates to the production of an austenitic stainless steel. If a ferritic stainless steel number is to be produced, in the first treatment stage the first molten iron 2 is exclusively nickel-free pig iron.
- FIG. 1 Further essential features of carrying out the process according to the invention in an AOD or AOD-L converter are the feeding of a first molten iron 2, for example an iron-nickel (FeNi) - or even a chromium-containing melt, into the AOD converter 3; the dephosphorization, desilication and decarburization of the first molten iron in the AOD converter 3; a reduction of the partial pressure of the system by increased inert gas rates and reduced oxygen rates in different blowing stages of the first and / or second treatment stage to minimize the metal losses due to oxidation; performing an oxidation process in the AOD converter 3 by introducing both oxygen and alternatively argon or nitrogen through side blow holes; the provision of a storage or bunker system located above the AOD converter 3, from which ferroalloys, coolant and additives can be fed to the respective molten iron or steel bath; performing a reduction phase after oxygen blowing by adding reducing agents with simultaneous argon stirring to transfer high levels of chromium from the
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014222727.5A DE102014222727A1 (de) | 2014-11-06 | 2014-11-06 | Verfahren und Vorrichtung zur Erzeugung eines Rostfreistahls |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3018219A1 true EP3018219A1 (fr) | 2016-05-11 |
| EP3018219B1 EP3018219B1 (fr) | 2019-08-14 |
Family
ID=54540807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15191347.2A Active EP3018219B1 (fr) | 2014-11-06 | 2015-10-23 | Procede de fabrication d'un acier inoxydable |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP3018219B1 (fr) |
| DE (1) | DE102014222727A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109554515A (zh) * | 2017-09-27 | 2019-04-02 | 鞍钢股份有限公司 | 一种顶吹转炉冶炼不锈钢方法 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110923551B (zh) * | 2019-11-13 | 2021-06-08 | 甘肃酒钢集团宏兴钢铁股份有限公司 | 一种控制钴含量核用奥氏体不锈钢的生产方法 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004018714A1 (fr) * | 2002-08-21 | 2004-03-04 | Voest-Alpine Industrieanlagenbau Gmbh & Co | Procedes et dispositif de decarburation d'une fonte d'acier |
| WO2006050963A2 (fr) * | 2004-11-12 | 2006-05-18 | Sms Demag Ag | Production d'acier inoxydable faisant partie du groupe des aciers ferritiques aisi 4xx dans un convertisseur aod |
| WO2008064798A1 (fr) | 2006-11-30 | 2008-06-05 | Sms Siemag Ag | Procédé et dispositif pour produire de l'acier inoxydable sans alimentation électrique, à base de fonte brute qui a été prétraitée dans une installation ddd |
| WO2008064797A1 (fr) | 2006-11-30 | 2008-06-05 | Sms Siemag Ag | Procédé et dispositif pour produire de la fonte brute à base d'acier inoxydable sans utiliser d'alimentation électrique |
| WO2008080379A1 (fr) * | 2007-01-04 | 2008-07-10 | Sms Siemag Aktiengesellschaft | Procédé et installation de production d'acier |
-
2014
- 2014-11-06 DE DE102014222727.5A patent/DE102014222727A1/de not_active Withdrawn
-
2015
- 2015-10-23 EP EP15191347.2A patent/EP3018219B1/fr active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004018714A1 (fr) * | 2002-08-21 | 2004-03-04 | Voest-Alpine Industrieanlagenbau Gmbh & Co | Procedes et dispositif de decarburation d'une fonte d'acier |
| WO2006050963A2 (fr) * | 2004-11-12 | 2006-05-18 | Sms Demag Ag | Production d'acier inoxydable faisant partie du groupe des aciers ferritiques aisi 4xx dans un convertisseur aod |
| WO2008064798A1 (fr) | 2006-11-30 | 2008-06-05 | Sms Siemag Ag | Procédé et dispositif pour produire de l'acier inoxydable sans alimentation électrique, à base de fonte brute qui a été prétraitée dans une installation ddd |
| WO2008064797A1 (fr) | 2006-11-30 | 2008-06-05 | Sms Siemag Ag | Procédé et dispositif pour produire de la fonte brute à base d'acier inoxydable sans utiliser d'alimentation électrique |
| WO2008080379A1 (fr) * | 2007-01-04 | 2008-07-10 | Sms Siemag Aktiengesellschaft | Procédé et installation de production d'acier |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109554515A (zh) * | 2017-09-27 | 2019-04-02 | 鞍钢股份有限公司 | 一种顶吹转炉冶炼不锈钢方法 |
| CN109554515B (zh) * | 2017-09-27 | 2020-09-01 | 鞍钢股份有限公司 | 一种顶吹转炉冶炼不锈钢方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3018219B1 (fr) | 2019-08-14 |
| DE102014222727A1 (de) | 2016-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69003124T2 (de) | Verfahren zur Herstellung einer Metallschmelze, enthaltend Nickel und Chrom. | |
| EP2207905B1 (fr) | Procédé de production d'acier inoxydable avec des fours de réduction directe de ferrochrome et de ferronickel sur le côté primaire d'un convertisseur | |
| DE2525355A1 (de) | Verfahren und vorrichtung zum frischen von eisen | |
| EP3018219B1 (fr) | Procede de fabrication d'un acier inoxydable | |
| DE1923596C3 (de) | Verfahren und Vorrichtung zur Stahlerzeugung | |
| DE102014215669A1 (de) | Verfahren und Produktionsanlage zur Erzeugung von Rostfrei-Stahl | |
| EP1627085A1 (fr) | Procede de recuperation d'elements metalliques, notamment de chrome metallique, a partir de laitiers contenant des oxydes metalliques, dans un four a arc electrique | |
| EP2097543B1 (fr) | Procédé pour produire de l'acier inoxydable sans alimentation électrique, à base de fonte brute qui a été prétraitée dans une installation ddd | |
| WO2021094412A1 (fr) | Production d'acier brut à partir d'une matière fondue | |
| DE2803940C2 (de) | Verfahren zum Vakuumfrischen hochchromhaltiger Stähle mit äußerst geringen Kohlenstoff- und Stickstoffgehalten | |
| DE3418643C2 (de) | Verfahren zur Herstellung eines einen niedrigen Phosphorwert aufweisenden Chrom enthaltenden Stahls | |
| EP2097505B1 (fr) | PROCÉDÉ POUR PRODUIRE DE LA FONTE BRUTE À BASE D'ACIER INOXYDABLE SANS UTILISER DE l'ÉNÉRGIE ÉLECTRIQUE | |
| EP0229586A2 (fr) | Procédé de fabrication d'aciers fortement alliés dans un convertisseur à soufflage d'oxygène par le haut | |
| EP3071714B1 (fr) | Utilisation de co et de co2 dans le cadre d'une technologie d'acier et d'alliage | |
| DE3110321C2 (de) | Verfahren zum Frischen von flüssigem Roheisen oder Stahl | |
| DE2813717A1 (de) | Verfahren zum herstellen von metallgusstuecken | |
| EP0086732A1 (fr) | Procédé pour augmenter la quantité d'agent de refroidissement au cours de la fabrication d'acier par soufflage à l'oxygène | |
| DE19832701B4 (de) | Verfahren zur Erzeugung von Stahl | |
| DE1927308B1 (de) | Anwendung der einstufigen Entphosphorung zur Herstellung eines Stahles auf das Sauerstoff-Aufblasverfahren | |
| AT18584B (de) | Verfahren zur Erzeugung von Stahl auf elektrometallurgischem Wege. | |
| DE102014011231A1 (de) | Verfahren zur Nickel Pig Iron (NPI)- Entkohlung im AOD -Konverter | |
| DE968154C (de) | Verfahren zum Erschmelzen von legierten Staehlen unter Verwendung mehrerer Schmelzoefen | |
| KR101647206B1 (ko) | 크롬 함유 용선의 탈린 방법 및 스테인리스 강의 제조방법 | |
| DE972820C (de) | Verfahren zur Herstellung von Transformatoren- und Dynamostaehlen | |
| DD239426A1 (de) | Verfahren zur roheisenumwandlung im konverter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20151023 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| AX | Request for extension of the european patent |
Extension state: BA ME |
|
| 17Q | First examination report despatched |
Effective date: 20160606 |
|
| RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R079 Ref document number: 502015009961 Country of ref document: DE Free format text: PREVIOUS MAIN CLASS: C21C0005360000 Ipc: C21C0007064000 |
|
| RIC1 | Information provided on ipc code assigned before grant |
Ipc: C21C 7/068 20060101ALI20190131BHEP Ipc: C21C 7/064 20060101AFI20190131BHEP Ipc: C21C 5/36 20060101ALI20190131BHEP Ipc: C21C 5/00 20060101ALI20190131BHEP Ipc: C22C 38/00 20060101ALI20190131BHEP Ipc: C21C 5/28 20060101ALI20190131BHEP |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
| INTG | Intention to grant announced |
Effective date: 20190308 |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP Ref country code: AT Ref legal event code: REF Ref document number: 1167093 Country of ref document: AT Kind code of ref document: T Effective date: 20190815 |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502015009961 Country of ref document: DE |
|
| REG | Reference to a national code |
Ref country code: SE Ref legal event code: TRGR |
|
| REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20190814 |
|
| REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191114 Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191114 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191216 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191214 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191115 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200224 Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502015009961 Country of ref document: DE |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| PG2D | Information on lapse in contracting state deleted |
Ref country code: IS |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20191031 Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20191023 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20191031 |
|
| 26N | No opposition filed |
Effective date: 20200603 |
|
| REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20191031 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20191031 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20191114 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20191114 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20191023 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20191031 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20151023 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190814 |
|
| P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230707 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20241021 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20241022 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20241025 Year of fee payment: 10 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20241021 Year of fee payment: 10 |