EP2099576A1 - Busette a jet creux pour coulee continue d'acier - Google Patents
Busette a jet creux pour coulee continue d'acierInfo
- Publication number
- EP2099576A1 EP2099576A1 EP07800357A EP07800357A EP2099576A1 EP 2099576 A1 EP2099576 A1 EP 2099576A1 EP 07800357 A EP07800357 A EP 07800357A EP 07800357 A EP07800357 A EP 07800357A EP 2099576 A1 EP2099576 A1 EP 2099576A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- powder
- nozzle
- installation according
- injection
- conduit
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 32
- 239000010959 steel Substances 0.000 title claims abstract description 32
- 238000005266 casting Methods 0.000 title claims description 11
- 239000000843 powder Substances 0.000 claims abstract description 53
- 238000002347 injection Methods 0.000 claims abstract description 39
- 239000007924 injection Substances 0.000 claims abstract description 39
- 230000001590 oxidative effect Effects 0.000 claims abstract description 18
- 238000009749 continuous casting Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000007769 metal material Substances 0.000 claims abstract description 6
- 239000007787 solid Substances 0.000 claims abstract description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 34
- 239000007789 gas Substances 0.000 claims description 21
- 229910052786 argon Inorganic materials 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 17
- 238000009826 distribution Methods 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 229910001021 Ferroalloy Inorganic materials 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 2
- 239000011343 solid material Substances 0.000 claims description 2
- 239000007800 oxidant agent Substances 0.000 abstract 3
- 238000012423 maintenance Methods 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000007920 subcutaneous administration Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/58—Pouring-nozzles with gas injecting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/108—Feeding additives, powders, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
Definitions
- the present invention relates to an improvement of the device and the casting process of a molten metal, in particular steel, in a continuous casting mold, using a hollow jet nozzle, where the finely divided metal material is injected into the interior volume of the hollow jet, the latter being maintained by circulation of a flow of non-oxidizing gas such as argon.
- the molten steel is introduced into the mold by means of at least one nozzle, that is to say a generally tubular element disposed between the distributor basket and the mold.
- the lower end of the nozzle is usually provided with one or two outlets located in the axis of the nozzle or laterally, and opens under the free level of liquid steel present in the mold.
- the hollow jet nozzle was developed about twenty years ago for the continuous casting of steel at low overheating.
- the main idea of the patent was to create a hollow jet inside the nozzle with runoff on the inner wall of the heat exchanger, allowing the cooling of the steel to:
- EP-B-605379 filed in 1993, has for object the injection of metal powder inside the hollow jet created in the nozzle HJN. Depending on the case, one can inject, always in the case of the casting of steel:
- the injection of the powder is carried out by pneumatic transport under argon through the refractory dome creating the hollow jet.
- the numerous industrial tests carried out with this equipment have revealed a major practical constraint for implementing the method in the continuous casting.
- the amount of argon used must absolutely be limited at the level of the mold to 15 to 20 Nl / min, this value depending on the characteristic of the machine in format and casting speed, in order to:
- FIG. 1 shows an example of a relationship between the powder flow rate and the argon flow rate for an iron powder having a particle size of between 100 and 200 ⁇ m injected into a tube 10 mm in diameter. This therefore limits the amount of injectable powder in the product, especially in the case of continuous slab casting where the powder flow rates must be greater than for the casting of billets.
- the rate of powder injected is limited to 13 kg / min.
- the present invention aims to provide a solution that overcomes the disadvantages of the state of the art.
- the invention aims to allow the injection of a quantity of metal powder in a HJN nozzle at a high flow rate while maintaining a flow rate of the protective gas of the hollow jet acceptable in intensity for stable operation continuous casting.
- a first object of the present invention relates to a continuous casting plant for the flow of liquid steel from a tundish into an ingot mold through a spout.
- hollow jet called HJN nozzle, comprising mainly, if it is described in a vertical position and considered in the direction of progression of the liquid steel from top to bottom, a vertical duct, terminated by an upper cover having an inlet port of the liquid steel from the distributor basket and a lower base having at least one outlet, said duct comprising in its upper part a distributor member disposed substantially at the inlet of said vertical duct and comprising a deflector or dome to deflect the metal entering the side walls of the nozzle, said nozzle also comprising metal powder injection means or solid metal material finely divided under said dome in an injection zone and non-oxidizing gas injection means for the establishment and maintenance of the hollow jet, characterized in that the powder injection means are independent and physically separate from the injection means of the non-oxidizing gas, so that in operation the non-oxidizing gas is not used
- said installation comprises on the one hand a conduit for the incoming flow of non-oxidizing gas in the nozzle at a first orifice, possibly terminated by an injector located at this first orifice and its device. flow and pressure measurement and secondly, separately, a conduit for supplying the powder nozzle, at a second orifice, possibly terminated by an injector located at this second orifice, a powder reservoir or finely divided particles and its weight measuring device.
- the powder injection means comprise mechanical means such as a worm gear device.
- the worm device is disposed between the bottom of the tundish and the top cover of the nozzle HJN.
- the conduit for the supply of the powder nozzle discharges under the distribution dome, at least a portion of this conduit being arranged in the distribution dome with a non-zero slope.
- the installation is provided with means for controlling the flow of powder, said means preferably comprising a servocontrol of the rotation of the worm to a continuous measurement of the weight of the powder reservoir.
- the powder injection means ' are maintained under an inert atmosphere.
- the non-oxidizing gas comprises argon and said metal powder is an iron or ferroalloy powder.
- a second object of the present invention relates to a process for the continuous casting of hollow jet steel, preferably in the form of flat or long products, by means of the aforementioned installation, comprising the following steps:
- FIG. 1 graphically represents the relationship between the flow rate of injected metal powder and the flow of argon in which it
- i is in suspension, for injection into a nozzle the continuous casting in hollow jet.
- Figure 2 shows an embodiment of an exemplary device according to the state of the art.
- Figure 3 shows a preferred embodiment of the device according to the present invention.
- Figure 2 shows a casting device according to the state of the art (patent BE 1014063), mounted between a continuous casting mold 1 and a ladle or a tundish 2 comprising an outlet duct 3
- the outlet duct 3 is provided with a flow regulator, such as a stopper 4 or a sliding drawer.
- the upper base of the cylinder is in contact with the conduit 3. This base is provided with a hole corresponding to the inner orifice of the conduit.
- the nozzle 5 comprises at its lower part at least one communication port 8 allowing the passage of steel to the mold.
- a dome-shaped distribution member 6 In the upper part of the nozzle 5 is arranged a dome-shaped distribution member 6, whose upper surface is slightly sloping, preferably greater than 10 °, relative to the horizontal.
- An injection device is arranged to introduce finely divided solid particles or powder 15 under the dome 6, using a non-oxidizing gas as a carrier.
- This device also comprises an inlet flow of argon 7 and its flow measuring device 9 and pressure device 10, a powder container or finely divided particles 11 and its weight measuring device 12, and finally a supply line in the nozzle 13, and an injector 14.
- the subject of the present invention is a device which makes it possible to dissociate the quantity of powder injected into the nozzle at hollow jet of the amount of argon added for the creation and maintenance of the hollow jet.
- the device of the invention shown schematically in Figure 3, and comprises means for separating the gas supply and powder injection.
- the supply of metal powder is ensured by means of a supply line 13, passing for example through the distribution dome 6, opening under it at an orifice 14, optionally provided with an injector of appropriate shape not shown, and provided with a worm 13A.
- Argon injection, independent of the injection of powder, intended solely to maintain the hollow jet is provided by an additional conduit 16 terminated by an orifice 17, optionally provided with an injector of appropriate shape not shown, opening for example also under the distribution dome 6.
- the worm 13A of the powder injection system according to the invention will be placed between the bottom of the distributor basket 2 and the cover 5A of the nozzle HJM 5.
- This particular location has the double advantage: positioning the screw 13A in a place where the temperatures are sustainable for a mechanical system and,
- a regulation of the powder flow rate will be ensured by a control of the speed of rotation of the screw, slaved to a continuous measurement of the weight of the powder reservoir.
- the entire injection system is maintained under an inert atmosphere of argon to prevent oxygen scavenging in the steel.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Nozzles (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI200730287T SI2099576T1 (sl) | 2006-12-12 | 2007-09-03 | Votla razpršilna šoba za kontinuirano litje jekla |
PL07800357T PL2099576T3 (pl) | 2006-12-12 | 2007-09-03 | Wylew kadziowy z pustym wewnątrz strumieniem do odlewania ciągłego stali |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE2006/0609A BE1017392A3 (fr) | 2006-12-12 | 2006-12-12 | Busette a jet creux pour coulee continue d'acier. |
PCT/BE2007/000100 WO2008070935A1 (fr) | 2006-12-12 | 2007-09-03 | Busette a jet creux pour coulee continue d'acier |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2099576A1 true EP2099576A1 (fr) | 2009-09-16 |
EP2099576B1 EP2099576B1 (fr) | 2010-05-19 |
EP2099576B8 EP2099576B8 (fr) | 2010-07-21 |
Family
ID=37964317
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07800357A Active EP2099576B8 (fr) | 2006-12-12 | 2007-09-03 | Busette a jet creux pour coulee continue d'acier |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP2099576B8 (fr) |
KR (1) | KR101454311B1 (fr) |
AT (1) | ATE468188T1 (fr) |
BE (1) | BE1017392A3 (fr) |
BR (1) | BRPI0718348B1 (fr) |
DE (1) | DE602007006689D1 (fr) |
ES (1) | ES2343979T3 (fr) |
PL (1) | PL2099576T3 (fr) |
SI (1) | SI2099576T1 (fr) |
WO (1) | WO2008070935A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150158078A1 (en) * | 2012-03-28 | 2015-06-11 | Arcelormittal Investigación Desarrollo, S.L. | Continuous casting process of metal |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL2830793T3 (pl) * | 2012-03-28 | 2020-07-13 | Arcelormittal | Wyposażenie do odlewania ciągłego |
KR101443348B1 (ko) * | 2013-03-28 | 2014-09-19 | 현대제철 주식회사 | 용강 탈황제 공급장치 |
EP3056304A1 (fr) * | 2015-02-16 | 2016-08-17 | Uvån Holding AB | Une buse et un ensemble à entonnoir pour la granulation de matière fondue |
CN111451462B (zh) * | 2020-04-09 | 2021-09-28 | 苏州大学 | 利用浸入式水口喷吹镁粉细化连铸坯凝固组织的方法 |
CN111570782A (zh) * | 2020-06-24 | 2020-08-25 | 攀钢集团攀枝花钢铁研究院有限公司 | 连铸浸入式水口 |
CN111496240A (zh) * | 2020-06-24 | 2020-08-07 | 攀钢集团攀枝花钢铁研究院有限公司 | 用于连铸的浸入式水口 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2150591A1 (en) * | 1971-08-27 | 1973-04-13 | Air Liquide | Cooling of molten metal - by addition of particles of the same metal(s) at a considerably lower temp |
IT1116425B (it) * | 1977-04-18 | 1986-02-10 | Centro Speriment Metallurg | Sistema di raffreddamento e alligazione della massa fusa nella colata continua dell'acciaio |
JPS5873713A (ja) * | 1981-10-27 | 1983-05-04 | Nippon Steel Corp | 強脱酸元素添加鋼の製造方法 |
DE3775722D1 (de) * | 1986-11-26 | 1992-02-13 | Centre Rech Metallurgique | Vorrichtung zum giessen eines pastenartigen metalles. |
BE1004121A6 (fr) * | 1990-05-04 | 1992-09-29 | Lahaut Hugues | Dispositif pour la coulee d'un metal et procede d'utilisation de ce dispositif. |
BE1006567A6 (fr) * | 1992-12-28 | 1994-10-18 | Centre Rech Metallurgique | Procede de coulee d'un metal en phase pateuse. |
BE1013745A3 (fr) * | 2000-10-10 | 2002-07-02 | Ct De Rech S Metallurg Ass San | Procede et dispositif pour couler en continu de l'acier a composition chimique mixte. |
BE1014063A3 (fr) * | 2001-03-22 | 2003-03-04 | Ct De Rech S Metallurg Ass San | Procede et dispositif pour couler en continu de l'acier presentant des oxydes fins. |
BE1016550A3 (fr) * | 2005-03-16 | 2007-01-09 | Ct Rech Metallurgiques Asbl | Procede pour couler en continu un metal a resistance mecanique amelioree et produit obtenu par le procede. |
-
2006
- 2006-12-12 BE BE2006/0609A patent/BE1017392A3/fr not_active IP Right Cessation
-
2007
- 2007-09-03 KR KR1020097012282A patent/KR101454311B1/ko active IP Right Grant
- 2007-09-03 BR BRPI0718348A patent/BRPI0718348B1/pt active IP Right Grant
- 2007-09-03 AT AT07800357T patent/ATE468188T1/de not_active IP Right Cessation
- 2007-09-03 DE DE602007006689T patent/DE602007006689D1/de active Active
- 2007-09-03 EP EP07800357A patent/EP2099576B8/fr active Active
- 2007-09-03 ES ES07800357T patent/ES2343979T3/es active Active
- 2007-09-03 WO PCT/BE2007/000100 patent/WO2008070935A1/fr active Application Filing
- 2007-09-03 PL PL07800357T patent/PL2099576T3/pl unknown
- 2007-09-03 SI SI200730287T patent/SI2099576T1/sl unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2008070935A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150158078A1 (en) * | 2012-03-28 | 2015-06-11 | Arcelormittal Investigación Desarrollo, S.L. | Continuous casting process of metal |
AU2012375161C1 (en) * | 2012-03-28 | 2016-11-24 | Arcelormittal Investigacion Y Desarrollo Sl | Continuous casting process of metal |
RU2608253C2 (ru) * | 2012-03-28 | 2017-01-17 | Арселормитталь Инвестигасьон И Десарролло Сл | Процесс непрерывного литья металла |
Also Published As
Publication number | Publication date |
---|---|
WO2008070935A1 (fr) | 2008-06-19 |
DE602007006689D1 (de) | 2010-07-01 |
BRPI0718348A2 (pt) | 2013-11-26 |
EP2099576B8 (fr) | 2010-07-21 |
KR20090095590A (ko) | 2009-09-09 |
PL2099576T3 (pl) | 2010-10-29 |
BRPI0718348B1 (pt) | 2016-03-29 |
ES2343979T3 (es) | 2010-08-13 |
EP2099576B1 (fr) | 2010-05-19 |
BE1017392A3 (fr) | 2008-08-05 |
KR101454311B1 (ko) | 2014-10-23 |
SI2099576T1 (sl) | 2010-08-31 |
ATE468188T1 (de) | 2010-06-15 |
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