WO2014131722A1 - Procédés de convertissage destinés à la production d'acier à l'aide de gaz inerte - Google Patents

Procédés de convertissage destinés à la production d'acier à l'aide de gaz inerte Download PDF

Info

Publication number
WO2014131722A1
WO2014131722A1 PCT/EP2014/053525 EP2014053525W WO2014131722A1 WO 2014131722 A1 WO2014131722 A1 WO 2014131722A1 EP 2014053525 W EP2014053525 W EP 2014053525W WO 2014131722 A1 WO2014131722 A1 WO 2014131722A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
molten metal
oxygen
blowing
treatment
Prior art date
Application number
PCT/EP2014/053525
Other languages
German (de)
English (en)
Inventor
Stefan Dimitrov
Jens Kluge
Original Assignee
Siemens Vai Metals Technologies Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Vai Metals Technologies Gmbh filed Critical Siemens Vai Metals Technologies Gmbh
Publication of WO2014131722A1 publication Critical patent/WO2014131722A1/fr

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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/04—Removing impurities other than carbon, phosphorus or sulfur
    • 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
    • C21C5/30—Regulating or controlling the blowing
    • 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
    • C21C7/072—Treatment with gases
    • 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
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/305—Afterburning
    • 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
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/32—Blowing from above
    • 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
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/35—Blowing from above and through the bath

Definitions

  • the inflated oxygen reacts with constituents of the melt - both with iron and with other elements that are below those in the converter
  • CO escape gaseous, such as CO as the primary product of C-oxidation.
  • carbon C, silicon Si, manganese Mn, phosphorus P, vanadium V, titanium Ti are removed from the melt.
  • An important aspect in performing an LD process is the use of a coolant to produce the molten metal to be treated.
  • coolant is to be understood as meaning a solid, iron-containing cooling material comprising, for example, scrap metal such as solid pig iron or steel scrap, tinder, iron ore, dust briquettes, ie briquettes, the iron-containing dust and / or sludge and / or iron-containing Waste / residues, for example accumulating in a steel mill, included.
  • scrap metal such as solid pig iron or steel scrap
  • dust briquettes ie briquettes
  • the iron-containing dust and / or sludge and / or iron-containing Waste / residues for example accumulating in a steel mill, included.
  • the cooling effect is achieved by the molten metal for melting and further treatment of the
  • Coolant is extracted in total heat.
  • the molten metal to be treated is formed by combining a starting amount of liquid molten iron with solid coolant, for example, scrap.
  • solid coolant for example, scrap.
  • energy is required, which is provided for example from exothermic reactions of the oxygen with elements in the molten metal - melting scrap therefore cools the melt, it acts as a coolant during the treatment with oxygen.
  • the ratio of scrap to the starting amount of molten pig iron must be chosen so that the melt is not cooled by the scrap too much - the amount of coolant scrap is therefore limited.
  • Pig iron pretreatment and crude steel production vary greatly; For example, for the reduction of the carbon content by means of a deC-process in catch-C-operation - in German catch batches - with dephosphated pig iron an intensive stirring effect of the scavenging elements for a controlled process management is not absolutely necessary or desirable; it is even preferable to set a low stirring effect over a low gas flow.
  • the flushing elements are designed, for example, in terms of dephosphorization so that the necessary for the required stirring gas flow can be provided, while on the other hand, the flushing elements should also work with a much lower gas flow in catch-C operation without clogging.
  • Such conflicting requirements can only be solved with compromises that have only a negative effect on the result of both process steps and the consumption figures.
  • the LD process there are other methods for steelmaking in a converter vessel.
  • bottom-blowing methods for example, OBM methods - (oxygen bottom motion), in which the oxygen for refining is not blown onto the molten metal, as opposed to the LD process, but through below the surface of the molten metal - for example at the bottom of the converter vessel or in the side wall of the converter vessel - mounted floor nozzles directly into the
  • a variant of the OBM process in which oxygen is also blown onto the molten metal for freshening in addition to the injection of oxygen through bottom nozzles - for example, by a so-called top lance - is the so-called K-OBM process (combined oxygen bottom motion). This can take place with inflated oxygen post-combustion of CO. However, it turns out that the heat transfer to the molten metal is fluctuating.
  • Process for treating a molten metal contained in a converter vessel and containing metal predominantly iron characterized in that it comprises
  • the inventive method comprises blowing a gas A in the space in the converter vessel above the molten metal from a blowing device.
  • Gas A is characterized as containing at least 10% by volume and up to 85% by volume of inert gas and containing 15% to 90% by volume of oxygen. It is a mixture of oxygen with at least one inert gas, preferably nitrogen. It is used primarily for afterburning and stirring for heat transfer to the molten metal.
  • the temperature of the gas A is below the outlet of the blowing device below 200 ° C, preferably at or below ambient temperature. For such temperatures, little or no effort is required to heat the mixtures.
  • gas A may also have a temperature below ambient temperature. If gas A is compressed before it exits the injector, it may be heated to ambient temperature upon exit. However, according to the invention, gas A preferably does not pass through devices which are intended primarily for heating the gases A and / or B before they are injected.
  • ambient temperature is meant the temperature of the environment in which a metallurgical plant in which the process according to the invention is carried out stands. This includes regional temperature fluctuations of the atmosphere depending on the location at different points on the earth.
  • inert gas is to be understood as a gas which is practically inert under the conditions prevailing in the melt or in the converter vessel during blowing and / or inflation conditions, so practically no chemical reactions - while nitrogen is also regarded as an inert gas, which is slightly dissolved in the melt and can form in the slag under the prevailing oxidation conditions in the converter only unstable nitrides.
  • the gas A ie a mixture of oxygen with at least one inert gas, preferably nitrogen
  • Molten metal from a blowing device enables efficient afterburning of flammable gases present in this space, for example CO, which is at Oxidation of the carbon contained in the molten metal is formed.
  • the molten metal can supply part of the energy released in the form of heat. Therefore, with afterburning and improved
  • the treatment of a contained in a converter vessel, containing as metal predominantly iron molten metal with oxygen is also referred to as fresh.
  • oxygen the carbon content of the molten metal and / or the content of the molten metal are reduced to other constituents.
  • Process steps are carried out for pig iron pretreatment or for crude steel production, in order to expel each specific components - such as the elements carbon, silicon, manganese, phosphorus, vanadium, titanium - targeted from the molten metal.
  • the method according to the invention allows an increase in the deliverable
  • Coolant amount compared to conventional methods in which the post-combustion takes place using at least technically pure oxygen, since it provides improved post-combustion and improved transmission in the
  • coolant is to be understood as meaning a solid, iron-containing cooling material comprising, for example, scrap metal such as solid pig iron or steel scrap, tinder, iron ore, dust briquettes, ie briquettes, the iron-containing dust and / or sludge and / or iron-containing Waste / residues, for example accumulating in a steel mill, included.
  • scrap metal such as solid pig iron or steel scrap
  • dust briquettes ie briquettes
  • the iron-containing dust and / or sludge and / or iron-containing Waste / residues for example accumulating in a steel mill, included.
  • the cooling effect is achieved by the molten metal for melting and further treatment of the
  • Coolant is extracted in total heat. Efficient afterburning requires temporally and locally stable supply of the oxygen required for afterburning to the location of the afterburning reaction - via empty space of the converter vessel - the space of the converter vessel above the
  • the amount of slag changes with time, for example during the
  • Blowing device consumed from a certain location of injected oxygen at different levels after exiting the injector by post combustion - so the beam of oxygen has a different depth of penetration of the
  • the slag can be any suitable material.
  • the slag can be any suitable material.
  • the slag can be any suitable material.
  • Blowing device flows into a foamy slag with high CO content, making it consumed quickly. Accordingly, it can only contribute a little to the mixing of the slag by its rapidly decreasing momentum. Mixing of the slag is necessary, however, in order to transfer the heat generated during the afterburning to the molten metal. The slag is then greatly overheated locally and the refractory wear in adjacent areas of the lining of the converter vessel increases. At another time, the slag can be far from the
  • the desired degree of post-combustion can occur during the process for
  • the use according to the invention of a mixture of oxygen and inert gas has the advantage, with regard to afterburning, that the inert gas does not react in the afterburning is consumed. Due to the Inertgasanteil is injected as a jet of gas A compared to a jet of technical-pure oxygen with respect to fluctuations of, for example, pressure, velocity, momentum, penetration depth,
  • Stabilization is caused by fluctuations in the use of oxygen
  • the jet of gas A blown in according to the invention has a higher pressure, a higher velocity, a higher momentum and a higher penetration depth, and thus better mixing properties, at the same oxygen feed rate.
  • the afterburning takes place along a longer path, so that
  • the stirring effect by the gas A contributes to better transfer of energy from the post-combustion in the molten metal, and thus makes a contribution to be able to admit more coolant. If the gas A contains less than 10% by volume of inert gas, insufficient inert gas is supplied to achieve the described stirring effect to an economically usable extent. When the gas A contains more than 85% by volume of inert gas, the supply of oxygen for after-burning of CO is not given to an economically useful extent.
  • the method also includes
  • a gas B onto the molten metal (13, 16) from an inflator, wherein the gas B contains at least 3 vol% and up to 100 vol% inert gas and contains 0 vol% to 97 vol% oxygen, and the temperature of the gas B when exiting the inflator below 200 ° C, preferably below 50 ° C, more preferably at or below ambient temperature.
  • Gas B is characterized as containing at least 3 vol% and up to 100 vol% inert gas and containing 0 vol% to 97 vol% oxygen. It is used for stirring for mixing and heat transfer to the molten metal and optionally for freshness.
  • Gas B is an inert gas, or it is a mixture of at least two different inert gases, or it is a mixture of oxygen with at least one inert gas, preferably nitrogen.
  • the temperature of the gas B exiting the inflator is below 200 ° C, preferably below 50 ° C, more preferably at or below ambient temperature. For such temperatures, little or no effort is required to heat the mixtures. Preferably, the temperature is at or below ambient temperature, then no effort for heating is necessary. Since technical gases that make up gas B - obtained, for example, by mixing one or more inert gases with each other or with oxygen, optionally cooled supplied or cool in the preparation of the mixtures by expansion, or at the exit from the
  • gas B may also have a temperature below ambient temperature.
  • Inflator emerges, it may be heated when discharged to ambient temperature.
  • gas B preferably does not pass through devices which are primarily used for heating the gases A and / or B before they are inflated
  • Gas A and Gas B can be the same. Preferably, they are different in order to be optimally matched to their respective task - with regard to the entire process sequence in the converter vessel.
  • inflating the gas B according to the invention inflation of at least technically pure, with an oxygen content of> 99 vol.%, Preferably> 99.5 vol.%, Is practiced in comparison to the inflation practiced so far in the case of the LD process or bottom-blowing processes such as the K-OBM process.
  • Oxygen reaches an improved stirring effect by the inflated gas in the molten metal.
  • the inert gas does not react with the molten metal and can therefore penetrate deeper into the melt as an inflated gas jet before it escapes from it. The penetrated inert gas expands due to its heating in the molten metal.
  • the purging elements may be designed to operate at the low gas flow in catch-C operation without clogging hazard; the stronger stirring effect required for dephosphorization need not be able to be provided by these flushing elements, since the inflation according to the invention makes a contribution.
  • the inventive method Compared with bottom-blowing methods that inflate hot blast on the molten metal, the inventive method has the advantage that the gas B has a much lower temperature than hot blast. Therefore, it expands more, resulting in a comparatively stronger stirring action, which in turn leads to improved heat transfer from CO afterburning. In addition, can be dispensed with equipment, which is needed to produce hot air.
  • the metal melt is not supplied with enough inert gas to achieve the described stirring effect to an economically usable extent.
  • gas B may be a mixture of argon and nitrogen.
  • Inflating the gas B to the molten metal in one embodiment is in addition to a primary supply of oxygen for refining - that is, a supply from another source that provides more oxygen for refining than gas B supplies.
  • a primary supply of oxygen for refining - that is, a supply from another source that provides more oxygen for refining than gas B supplies.
  • the primary supply of oxygen for refining from the ground takes place.
  • nitrogen and / or argon may be present in gas A and / or gas B.
  • gas A for reasons of cost, preferably only nitrogen is present.
  • Nitrogen and / or argon is preferably present in gas B as the inert gas.
  • argon is used in gas B, if nitriding of the molten metal is to be avoided.
  • the gas B or the gas A is produced by mixing two or more gases, this is done, for example, in such a way that the gases to be mixed after the TOP take-over point, for example with all individual gases with a pressure at the TOP of> 15 -16 bar - for each of the gases A and B in valve stands separately - if necessary on-line steers according to determined currently prevailing
  • the gas A and / or the gas B is air.
  • the air can be dry compressed air.
  • Gas A and / or gas B can of course also be obtained by mixing air,
  • dry compressed air with - for example, technically pure - oxygen or - for example, technically pure - nitrogen are produced.
  • Mixtures can also be called cold wind.
  • liquid pig iron preferably at least one treatment of liquid pig iron from the group
  • Molten metal can be conventional or according to the invention.
  • the method according to the invention is the production of crude steel by LD process.
  • This can be an LD process with-apart from any previous desulfurization of the pig iron not previously treated already - act liquid pig iron, or to an LD process under deC from - in addition to desulfurization - previously treated pig iron.
  • the pretreatment can be deSi, deMn, deP, deV, deTi; it can be carried out in a converter vessel other than the LD method.
  • this involves the production of crude steel
  • Molten metal can be conventional or according to the invention.
  • a Bodenblasendes or a combined - from the bottom or the side walls of the converter vessel below the bath level of the molten metal is a Bodenblasendes or a combined - from the bottom or the side walls of the converter vessel below the bath level of the molten metal, and from above-blowing method, for example an OBM or K-OBM method.
  • the proportion of the inert gas in the gas A and / or gas B is varied during the treatment. This can be responded to various requirements in the process flow; For example, in a process phase in which more weight on the oxygen supply than on the
  • the gas A is supplied by means of a blowing lance comprising the blowing device.
  • a blowing lance comprising the blowing device.
  • Such a lance can be called Kombilanze.
  • the gas A and the gas B are supplied by means of a blowing lance comprising the inflator and the blowing device.
  • a blowing lance comprising the inflator and the blowing device.
  • Such a lance can be called Kombilanze.
  • the blowing of the gas A from one on the converter vessel preferably in the region of the upper cone and / or in the region of the mouth of the converter vessel, arranged Einblasdüsen comprehensive
  • the inflation of the gas B takes place from an inflator comprising a lance.
  • FIG. 1 shows an LD process according to the invention.
  • FIG. 2 shows another embodiment of an LD process according to the invention.
  • FIGS. 3 and 5 show embodiments according to the invention for OBM process guides.
  • FIGS. 4, 6 and 7 show embodiments according to the invention for K-OBM process guides.
  • FIG. 1 shows an embodiment of an LD process according to the invention.
  • a converter vessel 1 is a molten metal, in this case liquid pig iron 2.
  • Gas B shown with straight arrows - inflated onto the molten pig iron.
  • injection nozzles 4 From in the upper cone of the converter vessel 1 arranged injection nozzles 4 a blowing device is gas A - represented with jagged arrows - in the space in the converter vessel above the
  • the temperature of gases A and B is below 50 ° C.
  • Gas B contains 10-30 vol% inert gas - nitrogen or argon, between the two can be switched - and 70-90 vol% oxygen; By changing the ratio, it is possible to react to various requirements in the procedure.
  • Gas A is dry compressed air - or a mixture of dry compressed air and technically pure oxygen - and contains 40-79 vol.% Of nitrogen as inert gas and
  • FIG. 2 shows an embodiment of an LD process according to the invention.
  • a converter vessel 1 is a molten metal, in this case liquid pig iron 2.
  • gas B shown with straight arrows - inflated onto the pig iron, and gas A - shown with jagged arrows - injected into the space in the converter vessel above the molten metal.
  • the temperature of gases A and B is below 50 ° C.
  • Gas B contains 10-30 vol% inert gas - nitrogen or argon, between the two can be switched - and 70-90 vol% oxygen; By changing the ratio, it is possible to react to various requirements in the procedure.
  • Gas A is dry compressed air - or a mixture of dry compressed air and technically pure oxygen - and contains 40-79 vol.% Of nitrogen as inert gas and
  • Embodiment 1 for an inventive LD process with inert gas flushing for the production of crude steel with a low C content.
  • the LD process also comprises inflation of technically pure oxygen.
  • Composition of the gases A and B and of the inert scavenging gas introduced via scavenging elements in the converter bottom for different process phases For example, as in the following Table 1 in the case of 5 process phases - blowing phases - in the LD process according to the invention for the production of crude steel with a low carbon content - ⁇ 0.05% C before tapping - listed: Table 1
  • Process phase gas A, vol.% Gas B, vol.% Inert purge gas (bubble phase) (via injection nozzles in the (over the fresh nozzles at over
  • Phase 1 0 2 60 0 2 90 N 2
  • Phase 2 0 2 40 0 2 100 N 2
  • Phase 3 0 2 30/21 (switching point at 0 2 100 Ar
  • Flushing elements in the converter bottom is always introduced only nitrogen as Inertsammlunggas - for different process phases during a treatment according to the invention of liquid pig iron.
  • liquid pig iron with the aim of removing Si and P (deSi + deP) - and optionally also of Mn, V and / or Ti, if these elements are present in the pig iron melt.
  • the liquid pig iron may have been subjected to a desulphurisation treatment in an upstream plant.
  • the process is carried out, for example, according to the invention as indicated in the following Table 2 in the case of 5 process phases - blowing phases -:
  • Process phase Gas A, vol.% Gas B, vol.% Inert purge gas e (via injection nozzles in the (over the fresh nozzles at over
  • Phase 3 0 2 30 0 2 80 N 2
  • FIG. 3 shows another embodiment of the invention, an OBM method.
  • the liquid pig iron 6 in a converter vessel 7 are via bottom nozzles 8 for fresh oxygen 0 2 - represented by arrows with dashed shaft -, as well
  • FIG. 4 shows another embodiment according to the invention, a K-OBM method.
  • FIG. 3 differs from the illustration in that a combination lance 10 comprising an inflator for gas B and a blower for gas A is present. This serves to gas A - represented as jagged arrows - in the room in the
  • a blow lance as in FIG. 3 or the combination lance in FIG. 4 could also be used for the purpose of technically pure oxygen in the course of the K-OBM process
  • FIG. 5 shows an embodiment of an OBM method according to the invention, in which, unlike FIG. 3, gas A - represented by jagged arrows - consists of injection nozzles 12 arranged in the region of the upper cone of the converter vessel 11
  • Blowing is blown into the space in the converter vessel above the molten metal 13.
  • FIG. 6 shows another embodiment of a K-OBM method according to the invention.
  • gas A - represented by jagged arrows - consists of injection nozzles 15 arranged in the region of the top of the converter vessel 14
  • FIG. 7 shows a further embodiment according to the invention of a K-OBM method, in which, in contrast to FIG. 6, no injection nozzles are present in the region of the upper cone of the converter vessel 18.
  • Embodiment 3 for an inventive OBM process or a K-OBM process for the production of crude steel with a low carbon content.
  • Composition of the gases A and B - which are supplied by the designated blowing and inflating - changed for different process phases is given in the following Table 3:
  • Process phase gas A, vol.% Gas B, vol.% Supply of e (via injection nozzles in the (in the case of K-OBM;
  • Phase 1 0 2 70 0 2 100 (preferred if gas yes
  • FIGS. 4 and 6 are identical to FIGS. 4 and 6)
  • Phase 2 0 2 60 0 2 100 (preferred if gas yes
  • FIGS. 4 and 6 are identical to FIGS. 4 and 6)
  • Phase 3 0 2 50 0 2 100 (preferred if gas yes
  • FIGS. 4 and 6 are identical to FIGS. 4 and 6)
  • Inergas N 2 79 (only inert gas or
  • stirring step ( cold air) preferably Ar) after 02-

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)

Abstract

L'invention concerne un procédé de traitement d'un métal en fusion (13,16) qui contient essentiellement du fer comme métal et qui se trouve dans un récipient convertisseur (1,7,11,14,18). caractérisé en ce qu'il comprend le soufflage d'un gaz A dans l'espace du récipient convertisseur (1,7,11,14,18) situé au-dessus du métal en fusion (13,16) à partir d'un dispositif de soufflage. Le gaz A contient minimum 10 % en volume et maximum 85 % en volume de gaz inerte, et 15 % en volume à 90 % en volume d'oxygène. La température du gaz A à la sortie du dispositif de soufflage est inférieure à 200 °C, de préférence inférieure à 50°C, idéalement égale à ou inférieure à la température ambiante. L'utilisation de gaz inerte dans le gaz A contribue à un meilleur transfert de chaleur au métal en fusion, autorisant ainsi des volumes d'agents réfrigérants plus importants.
PCT/EP2014/053525 2013-02-26 2014-02-24 Procédés de convertissage destinés à la production d'acier à l'aide de gaz inerte WO2014131722A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13156759.6A EP2770067A1 (fr) 2013-02-26 2013-02-26 Procédé de convertisseur pour la fabrication d'acier en utilisant un gaz inerte
EP13156759.6 2013-02-26

Publications (1)

Publication Number Publication Date
WO2014131722A1 true WO2014131722A1 (fr) 2014-09-04

Family

ID=47779883

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/053525 WO2014131722A1 (fr) 2013-02-26 2014-02-24 Procédés de convertissage destinés à la production d'acier à l'aide de gaz inerte

Country Status (2)

Country Link
EP (1) EP2770067A1 (fr)
WO (1) WO2014131722A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109722499B (zh) * 2019-02-28 2021-02-09 攀钢集团攀枝花钢钒有限公司 转炉提钒氧氮混吹供气方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB472397A (en) * 1935-04-03 1937-09-12 Electro Metallurg Co Process for purifying iron, steel, non-ferrous metals and ferro-alloys
GB891149A (en) * 1957-04-18 1962-03-14 Roman Rummel Method of and apparatus for carrying out metallurgical reactions
US20080236334A1 (en) * 2007-03-29 2008-10-02 M.K.N. Technologies Gmbh Melting metallurgical process for producing metal melts and transition metal-containing additive for use in this method
DE102009022208A1 (de) * 2009-05-20 2010-11-25 Messer Group Gmbh Verfahren und Vorrichtung zum Behandeln von Metallschmelzen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB472397A (en) * 1935-04-03 1937-09-12 Electro Metallurg Co Process for purifying iron, steel, non-ferrous metals and ferro-alloys
GB891149A (en) * 1957-04-18 1962-03-14 Roman Rummel Method of and apparatus for carrying out metallurgical reactions
US20080236334A1 (en) * 2007-03-29 2008-10-02 M.K.N. Technologies Gmbh Melting metallurgical process for producing metal melts and transition metal-containing additive for use in this method
DE102009022208A1 (de) * 2009-05-20 2010-11-25 Messer Group Gmbh Verfahren und Vorrichtung zum Behandeln von Metallschmelzen

Also Published As

Publication number Publication date
EP2770067A1 (fr) 2014-08-27

Similar Documents

Publication Publication Date Title
DE69927837T2 (de) Verfahren und vorrichtung zur herstellung von metallen und metalllegierungen
DE69906125T2 (de) Integrierte vorrichtung zum einspritzen von technologischen gasen und feststoffen sowie verfahren zur anwendung dieser vorrichtung zum behandeln metallischer schmelzen
DD140757A5 (de) Verfahren zur verbesserung der waermebilanz beim stahlfrischen
DE2525355A1 (de) Verfahren und vorrichtung zum frischen von eisen
DE2755165A1 (de) Verfahren zur schrottsatzerhoehung bei der erzeugung von stahl
DE112019000054T5 (de) Verfahren zum Entschlacken während der Herstellung eines Stahls mit ultraniedrigem Phosphorgehalt und Verfahren zur Herstellung eines Stahls mit ultraniedrigem Phosphorgehalt
DE60131426T2 (de) Verfahren und vorrichtung zur direkterschmelzung
DE2550761A1 (de) Verfahren zur herstellung von fluessigem eisen
DD151077A5 (de) Verfahren zur herstellung von stahl
DE60127278T2 (de) Verfahren zur direkterschmelzung
DE1458961A1 (de) Verfahren und Vorrichtung zum Frischen einer Eisenschmelze und zur Stahlerzeugung
DE19608531C2 (de) Verfahren zur Behandlung von Stahl, insbesondere zum Raffinieren von Stahl zum Zuge der Stahlerzeugung
DE2405737B2 (de) Verfahren zum entkohlen von chromlegierungs-stahlschmelze
WO2014131722A1 (fr) Procédés de convertissage destinés à la production d'acier à l'aide de gaz inerte
DE2306398B1 (de) Verfahren zur Behandlung von schmelzflüssigen Nichteisenmetallen, insbesondere Kupfer, durch Aufblasen von Reaktionsgasen
DE102022118640A1 (de) Verfahren zur Herstellung einer Eisenschmelze in einem elektrischen Einschmelzer
EP2106454B1 (fr) Dispositif et procédé de traitement de plomb d' uvre
DE3106908C2 (de) Verfahren zum Kühlen von konzentrischen Blasformen
EP0425620B1 (fr) Procede et dispositif de fonte de metaux dans des cubilots exploites sans coke
DE2538619A1 (de) Verfahren zur steigerung des metalllischen ausbringens bei bodenblasenden frischverfahren
DE3111168A1 (de) Verfahren und vorrichtung zur herstellung eines im wesentlichen h(pfeil abwaerts)2(pfeil abwaerts) und co enthaltenden gases
EP2440872B1 (fr) Procédé d'utilisation d'un système de nettoyage du fond d'un convertisseur bof
DE102008049121B3 (de) Verfahren zum Herstellen einer Stahlschmelze mit einem Mangan-Gehalt von mindestens 2 Gew.-%
DE4014835C2 (de) Verfahren zur Oxidationsbehandlung eines flüssigen Bades
EP1530648B1 (fr) Procedes et dispositif de decarburation d'une fonte d'acier

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14707712

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14707712

Country of ref document: EP

Kind code of ref document: A1