US20120199308A1 - Stirrer - Google Patents
Stirrer Download PDFInfo
- Publication number
- US20120199308A1 US20120199308A1 US13/402,144 US201213402144A US2012199308A1 US 20120199308 A1 US20120199308 A1 US 20120199308A1 US 201213402144 A US201213402144 A US 201213402144A US 2012199308 A1 US2012199308 A1 US 2012199308A1
- Authority
- US
- United States
- Prior art keywords
- meniscus
- molten metal
- mold
- iron core
- mould
- 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.)
- Abandoned
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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
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/02—Use of electric or magnetic effects
-
- 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
- B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
Definitions
- the present invention relates to a device for continuous or semicontinuous casting of metals including a stirrer.
- a molten metal is supplied to a casting mould, hereinafter designated mould, in which it is cooled and formed into an elongated strand.
- the strand is designated BILLET, BLOOM or SLAB.
- a primary flow of hot, molten metal is supplied to the cooled mould, in which the metal is cooled and at least partially solidifies into an elongated strand.
- the cooled and partially solidified strand then continuously leaves the mould. At the point where the strand leaves the mould, it has at least a mechanically self-supporting, solidified casing that surrounds a non-solidified centre.
- the cooled mould is open at two opposite ends in the casting direction and preferably connected to means for supporting the mould and means for supplying coolant to the mould and supporting means.
- the mould is preferably made of a copper-based alloy with good thermal conductivity.
- the molten metal is supplied to the mould via a casting tube that extends down into the molten metal that exists therein.
- a casting tube that extends down into the molten metal that exists therein.
- the incoming flow of molten metal is guided towards the narrow sides of the mould due to the design of the casting tube, thus generating a so-called primary flow and a so-called secondary flow.
- the primary flow leads downwards in the casting direction, along the narrow sides of the mould, whereas the secondary flow leads from the region of the narrow sides of the mould upwards towards the surface of the metal bath, designated the meniscus, and then downwards again.
- the meniscus is covered by a layer consisting of casting powder intended to act as protection against the surrounding atmosphere and to minimize heat losses.
- hot metal flow is allowed to enter into the mould in an uncontrolled manner, the flow will penetrate deep into the cast strand, which probably will have a negative influence on the quality and productivity.
- An uncontrolled hot metal flow in the cast strand may result in encapsulation of non-metallic particles and/or gas occlusions in the solidified strand, or cause casting defects in the inner structure of the cast strand.
- a deep penetration of hot metal flow may also cause a partial remelting of the solidified surface structure so that the melt penetrates the surface layer below the mould, which causes severe disturbances in production and a long downtime for repair.
- Velocity variations caused by oscillating flow in the mould give rise to pressure variations at the meniscus, and, in addition, variations in height arise at the meniscus.
- Velocity variations caused by oscillating flow in the mould give rise to pressure variations at the meniscus, and, in addition, variations in height arise at the meniscus.
- the velocity of flow and hence the turbulence at the meniscus become too high, this leads to slag being drawn down from the casting powder and further down into the solidified strand, and results in an increased risk of cracking due to uneven shell growth.
- the object of the present invention is to provide a device for continuous or semicontinuous casting of metals, especially intended for casting of slabs, which contributes to reduce or eliminate the disadvantages mentioned above.
- a device is aimed at which creates an even flow at the meniscus for different speeds of the inflowing melt.
- the metal flow at the meniscus is directed away from the narrow sides of the mould inwards towards the casting tube and uniformly across the whole width of the melt, and, in addition, a homogeneous flow configuration is obtained at the meniscus which provides the lowest turbulence when the flow is uniform across the whole mould width.
- a stirrer placed as previously described a sufficiently large counter-directed meniscus flow is obtained uniformly over the whole width of the casting mould while at the same time the turbulence is restricted.
- the location of the stirrer also contributes to obtain a good rotation of the melt around the casting tube and the installation of the stirrer is considerably simpler compared with prior art solutions.
- the secondary flow is utilized in an optimum way while at the same time, with the help of the stirrer, it is modified so as to obtain a good symmetrical flow of the melt in the mould including a good horizontal flow of the melt around the casting tube, which promotes an even shell growth while at the same time the amount of inclusions in the finished strand is reduced.
- an optimum flow is meant that the velocity of the melt at the meniscus (the secondary flow) is maintained at a constant level without varying in time while at the same time the velocity of the metal flow (the primary flow) directed downwards from the casting tube is to be kept at as low a level as possible to minimize the risk of inclusions accompanying the melt far down into the solidified strand.
- the dimension of the iron cores of the stirrer in the vertical direction is usually 240-280 mm.
- the iron core is arranged such that its upper part is positioned at a distance away from the meniscus that lies from 50 mm above the surface of the meniscus to 150 mm below said surface.
- the iron core is arranged such that its upper part is positioned at a distance away from the meniscus that lies from 50 mm above the surface of the meniscus to 100 mm below said surface.
- two stirrers are arranged symmetrically around the centre line of the broad sides of the mould and on both sides of said broad sides. Since the iron cores of the stirrers only need to cover part of the width of the cast strand, such a device provides a cost-effective solution since a good rotation of the melt around the casting tube as well as an even velocity profile over the thickness of the width of the cast strand are obtained.
- stirrers are placed asymmetrically, on respective sides of the long sides of the mould.
- This embodiment provides advantages such as lower weight, lower power consumption and reduced influence of magnetic fields on the surroundings.
- the pole pitch is large, which results in a maximally effective stirrer.
- FIG. 1 is an explanatory sketch of the device according to the invention.
- FIG. 2 is a top view according to one embodiment of the device according to the invention.
- FIG. 3 is an exploded view of a continuous casting device according to the invention.
- FIG. 1 shows an explanatory sketch of the invention, comprising a mould 1 enclosing a melt 2 which is supplied to the mould 1 by means of a casting tube 3 lowered into the melt.
- the melt 2 is cooled and a partially solidified strand is formed.
- the strand is then moved continuously out of the mould 1 .
- at least one stirrer 4 is arranged which has an iron core and a coil applied around it and, with the iron cores arranged so as not to cover the whole length of the broad sides of the mould but instead at least 50% of the broad sides of the mould and at most 80% of the broad sides of the mould, symmetrically about the centre line 5 of the mould 1 on both sides of the broad sides of the mould.
- the iron cores are arranged such that their upper parts are positioned at a distance from the meniscus that lies from 50 mm above the surface 7 of the meniscus to 195 mm below said surface 7 , in order to create a rotating stirring of the melt below the meniscus 7 by means of a period low-frequency travelling field.
- FIG. 2 shows an alternative embodiment of the invention, wherein the stirrers 8 are located asymmetrically on respective sides of the broad sides 10 of the mould 9 and arranged such that the upper parts of the iron cores are positioned at a distance from the meniscus that lies from 50 mm above the surface of the meniscus to 195 mm below said surface.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Continuous Casting (AREA)
Abstract
A method for casting of metal. A mold is provided including two broad sides and two narrow sides. A molten metal is introduced into the mold. There is a meniscus at a top of the molten metal. Additional molten metal is supplied into the molten metal via a casting tube below the meniscus. At least one stirrer including an iron core and a coil applied around the iron core is arranged around the mold. A length of the iron core in relation to a length of the broad side of the mold is between 50% and 80% of the length of the broad side. An upper part of the iron core is positioned from 50 mm above to 195 mm below the surface of the meniscus. A magnetic field is applied to the molten metal with the at least one stirrer to stir the molten metal.
Description
- This application is a divisional application of co-pending U.S. patent application Ser. No. 12/298,537 filed 27 Oct. 2008, and claims priority to Swedish patent application number 0600919-5 filed 25 Apr. 2006 and application Ser. No. 12/298,537 is the national phase under 35 U.S.C. §371 of PCT/SE2007/050269 filed 10 Apr. 2007.
- The present invention relates to a device for continuous or semicontinuous casting of metals including a stirrer.
- During continuous or semicontinuous casting, a molten metal is supplied to a casting mould, hereinafter designated mould, in which it is cooled and formed into an elongated strand. Depending on its cross-sectional dimensions, the strand is designated BILLET, BLOOM or SLAB. During the casting, a primary flow of hot, molten metal is supplied to the cooled mould, in which the metal is cooled and at least partially solidifies into an elongated strand. The cooled and partially solidified strand then continuously leaves the mould. At the point where the strand leaves the mould, it has at least a mechanically self-supporting, solidified casing that surrounds a non-solidified centre. The cooled mould is open at two opposite ends in the casting direction and preferably connected to means for supporting the mould and means for supplying coolant to the mould and supporting means. The mould is preferably made of a copper-based alloy with good thermal conductivity.
- From a casting box, also designated tundish, the molten metal is supplied to the mould via a casting tube that extends down into the molten metal that exists therein. When the melt from the tube flows into the melt that already exists in the mould, the incoming flow of molten metal is guided towards the narrow sides of the mould due to the design of the casting tube, thus generating a so-called primary flow and a so-called secondary flow. The primary flow leads downwards in the casting direction, along the narrow sides of the mould, whereas the secondary flow leads from the region of the narrow sides of the mould upwards towards the surface of the metal bath, designated the meniscus, and then downwards again. The meniscus is covered by a layer consisting of casting powder intended to act as protection against the surrounding atmosphere and to minimize heat losses.
- In different parts of the metal bath that is present in the mould, periodic velocity fluctuations occur during the casting process. Thus, upper and lower loops arise, in which the melt flows around in a manner known per se. Due to resonance phenomena, which are associated with the periodic oscillations of such loops, large bubbles, for example argon gas bubbles, oxide inclusions from the casting tube, and slag of various kinds from the surface of the metal bath will be transported far down in the casting direction, that is, far down into the cast strand that is initially formed in the mould. This results in inclusions and irregularities in the finished, solidified cast strand.
- If the hot metal flow is allowed to enter into the mould in an uncontrolled manner, the flow will penetrate deep into the cast strand, which probably will have a negative influence on the quality and productivity. An uncontrolled hot metal flow in the cast strand may result in encapsulation of non-metallic particles and/or gas occlusions in the solidified strand, or cause casting defects in the inner structure of the cast strand. A deep penetration of hot metal flow may also cause a partial remelting of the solidified surface structure so that the melt penetrates the surface layer below the mould, which causes severe disturbances in production and a long downtime for repair.
- Velocity variations caused by oscillating flow in the mould give rise to pressure variations at the meniscus, and, in addition, variations in height arise at the meniscus. When the velocity of flow and hence the turbulence at the meniscus become too high, this leads to slag being drawn down from the casting powder and further down into the solidified strand, and results in an increased risk of cracking due to uneven shell growth.
- On the other hand, when the velocity becomes too low at the meniscus, there is a risk of temperature differences arising, which may lead to local solidification at the meniscus with ensuing risks of cracking and of slag particles adhering under the shell that is solidifying at the meniscus. It is thus important, especially at low casting speeds, to maintain a flow at the meniscus that is optimal with respect to the speed in order to supply heat for melting of casting powder while at the same time endeavouring to obtain a low turbulence. In the region around the casting tube, there is a considerable risk of a local, unfavourable flow or stagnation of the melt arising, which leads to cracks being formed in the cast strand. Further, the oscillating flow provides an unsymmetrical velocity downwards in the mould. In certain situations, the velocity on one narrow side of the mould may become considerably higher than on the opposite narrow side, which results in a heavy downward transport of inclusions and gas bubbles with an ensuing deterioration of the quality of the cast object.
- From Japanese patent publication JP-57017355, it is known to arrange electromagnetic stirrers, wherein the stirrer in the vertical direction is placed such that the distance from its upper edge to the meniscus is larger than or equal to 200 mm at the long side of the mould for the purpose of preventing casting powder from being drawn down from the meniscus of the melt and further down into the cast strand. The dimension of the stirrer in relation to the broad side of the mould amounts to 0.4-0.7 times the dimension of the broad side of the mould (0.4-0.7)*b. This solution, however, is only intended to create stirring a certain distance down in the melt and does not completely solve the previously mentioned problems relating to velocity variations.
- The object of the present invention is to provide a device for continuous or semicontinuous casting of metals, especially intended for casting of slabs, which contributes to reduce or eliminate the disadvantages mentioned above. In particular, a device is aimed at which creates an even flow at the meniscus for different speeds of the inflowing melt.
- This object is achieved by means of the device described in the introductory part of the specification, which is characterized in that the iron core is arranged such that its upper part is positioned at a distance from the meniscus that lies from 50 mm above the surface of the meniscus to 195 mm below said surface.
- By this device, the metal flow at the meniscus is directed away from the narrow sides of the mould inwards towards the casting tube and uniformly across the whole width of the melt, and, in addition, a homogeneous flow configuration is obtained at the meniscus which provides the lowest turbulence when the flow is uniform across the whole mould width. With a stirrer placed as previously described, a sufficiently large counter-directed meniscus flow is obtained uniformly over the whole width of the casting mould while at the same time the turbulence is restricted. The location of the stirrer also contributes to obtain a good rotation of the melt around the casting tube and the installation of the stirrer is considerably simpler compared with prior art solutions. By arranging the stirrer as described above, the secondary flow is utilized in an optimum way while at the same time, with the help of the stirrer, it is modified so as to obtain a good symmetrical flow of the melt in the mould including a good horizontal flow of the melt around the casting tube, which promotes an even shell growth while at the same time the amount of inclusions in the finished strand is reduced. By an optimum flow is meant that the velocity of the melt at the meniscus (the secondary flow) is maintained at a constant level without varying in time while at the same time the velocity of the metal flow (the primary flow) directed downwards from the casting tube is to be kept at as low a level as possible to minimize the risk of inclusions accompanying the melt far down into the solidified strand. The dimension of the iron cores of the stirrer in the vertical direction is usually 240-280 mm.
- According to an alternative embodiment, the iron core is arranged such that its upper part is positioned at a distance away from the meniscus that lies from 50 mm above the surface of the meniscus to 150 mm below said surface.
- According to an alternative embodiment, the iron core is arranged such that its upper part is positioned at a distance away from the meniscus that lies from 50 mm above the surface of the meniscus to 100 mm below said surface.
- According to a preferred embodiment of the invention, two stirrers are arranged symmetrically around the centre line of the broad sides of the mould and on both sides of said broad sides. Since the iron cores of the stirrers only need to cover part of the width of the cast strand, such a device provides a cost-effective solution since a good rotation of the melt around the casting tube as well as an even velocity profile over the thickness of the width of the cast strand are obtained.
- According to a further embodiment of the invention, two stirrers are placed asymmetrically, on respective sides of the long sides of the mould. This embodiment provides advantages such as lower weight, lower power consumption and reduced influence of magnetic fields on the surroundings. In addition, the pole pitch is large, which results in a maximally effective stirrer.
- Additional advantages and advantageous features of the invention will become clear from the following description and the other dependent claims.
- The present invention will now be explained in greater detail by means of various embodiments and with reference to the accompanying drawings.
-
FIG. 1 is an explanatory sketch of the device according to the invention. -
FIG. 2 is a top view according to one embodiment of the device according to the invention. -
FIG. 3 is an exploded view of a continuous casting device according to the invention. - The invention will now be described by means of various embodiments.
-
FIG. 1 shows an explanatory sketch of the invention, comprising amould 1 enclosing amelt 2 which is supplied to themould 1 by means of acasting tube 3 lowered into the melt. Themelt 2 is cooled and a partially solidified strand is formed. The strand is then moved continuously out of themould 1. According to the invention, at least onestirrer 4 is arranged which has an iron core and a coil applied around it and, with the iron cores arranged so as not to cover the whole length of the broad sides of the mould but instead at least 50% of the broad sides of the mould and at most 80% of the broad sides of the mould, symmetrically about thecentre line 5 of themould 1 on both sides of the broad sides of the mould. The iron cores are arranged such that their upper parts are positioned at a distance from the meniscus that lies from 50 mm above thesurface 7 of the meniscus to 195 mm below saidsurface 7, in order to create a rotating stirring of the melt below themeniscus 7 by means of a period low-frequency travelling field. By arranging thestirrers 4 as described above, a good rotating stirring of the melt in the mould, including a good stirring of the melt around the castingtube 3, are obtained. Furthermore, the fact that thestirrers 4 do not cover the whole mould width means that the normal flow pattern that arises, when the melt is supplied to the mould via thecasting tube 3, is not adversely affected. -
FIG. 2 shows an alternative embodiment of the invention, wherein thestirrers 8 are located asymmetrically on respective sides of thebroad sides 10 of themould 9 and arranged such that the upper parts of the iron cores are positioned at a distance from the meniscus that lies from 50 mm above the surface of the meniscus to 195 mm below said surface. - The invention is not limited to the embodiments shown, but may be varied and modified within the scope of the following claims.
Claims (6)
1-5. (canceled)
6. A method for continuous or semicontinuous casting of metal, the method comprising:
providing a mold comprising two broad sides and two narrow sides through which a molten metal passes during a casting process;
introducing a molten metal into the mold, such that the molten metal has a meniscus at a top of the molten metal;
supplying additional molten metal into the molten metal already present in the mold via a casting tube, wherein the additional molten metal is introduced into the molten metal already present in the mold in a region at a distance below the meniscus of the molten metal;
arranging around the mold at least one stirrer comprising an iron core and a coil applied around the iron core, such that the iron core is arranged to be elongated along a broad side of the mold and a length of the iron core in relation to a length of the broad side of the mold is between 50% and 80% of the length of the broad side, wherein the iron core is arranged such that an upper part of the iron core is positioned at a distance from the meniscus from 50 mm above a surface of the meniscus to 195 mm below said surface of the meniscus; and
applying with the at least one stirrer a magnetic field to the molten metal to stir said molten metal.
7. The method according to claim 6 , wherein the iron core is arranged such that the upper part is positioned at a distance from the meniscus from 50 mm above the surface of the meniscus to 150 mm below said surface of the meniscus.
8. The method according to claim 6 , wherein the iron core is arranged such that the upper part is positioned at a distance from the meniscus from 50 mm above the surface of the meniscus to 100 mm below said surface of the meniscus.
9. The method according to claim 6 , wherein two stirrers are located symmetrically around a center line of the broad sides of the mold and on both sides of said broad sides.
10. The method according claim 6 , wherein two stirrers are located asymmetrically, on respective sides of the broad sides of the mold.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/402,144 US20120199308A1 (en) | 2006-04-25 | 2012-02-22 | Stirrer |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0600919-5 | 2006-04-25 | ||
SE0600919 | 2006-04-25 | ||
US12/298,537 US20090255642A1 (en) | 2006-04-25 | 2007-04-25 | Stirrer |
PCT/SE2007/050269 WO2007123485A1 (en) | 2006-04-25 | 2007-04-25 | A stirrer |
US13/402,144 US20120199308A1 (en) | 2006-04-25 | 2012-02-22 | Stirrer |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2007/050269 Division WO2007123485A1 (en) | 2006-04-25 | 2007-04-25 | A stirrer |
US12298537 Division | 2008-10-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120199308A1 true US20120199308A1 (en) | 2012-08-09 |
Family
ID=38625289
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/298,537 Abandoned US20090255642A1 (en) | 2006-04-25 | 2007-04-25 | Stirrer |
US13/402,144 Abandoned US20120199308A1 (en) | 2006-04-25 | 2012-02-22 | Stirrer |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/298,537 Abandoned US20090255642A1 (en) | 2006-04-25 | 2007-04-25 | Stirrer |
Country Status (7)
Country | Link |
---|---|
US (2) | US20090255642A1 (en) |
EP (1) | EP2010346A4 (en) |
JP (1) | JP2009535216A (en) |
KR (1) | KR20090016445A (en) |
CN (1) | CN101410204B (en) |
RU (1) | RU2419508C2 (en) |
WO (1) | WO2007123485A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6631162B2 (en) * | 2015-10-30 | 2020-01-15 | 日本製鉄株式会社 | Continuous casting method and continuous casting apparatus for multilayer slab |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5717355A (en) * | 1980-07-02 | 1982-01-29 | Nippon Kokan Kk <Nkk> | Method for electromagnetic stirring of molten sheet within mold in slab continuous casting |
US4746268A (en) * | 1987-07-29 | 1988-05-24 | Hitachi, Ltd. | End face mechanical shaft seal for use in hydraulic machines and seal ring assembly for use in the shaft seal |
US5085265A (en) * | 1990-03-23 | 1992-02-04 | Nkk Corporation | Method for continuous casting of molten steel and apparatus therefor |
US20030183363A1 (en) * | 2000-07-05 | 2003-10-02 | Anders Lehman | Method and device for controlling stirring in a strand |
US7669638B2 (en) * | 2002-11-29 | 2010-03-02 | Abb Ab | Control system, computer program product, device and method |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5775268A (en) * | 1980-10-30 | 1982-05-11 | Nippon Kokan Kk <Nkk> | Electromagnetic stirring method for molten steel in mold in continuous casting plant |
JPS58100955A (en) * | 1981-12-11 | 1983-06-15 | Kawasaki Steel Corp | Method and device for stirring of molten steel in continuous casting mold |
JPS6114052A (en) * | 1984-06-28 | 1986-01-22 | Toshiba Corp | Electromagnetic stirring method |
JPH07314104A (en) * | 1994-05-24 | 1995-12-05 | Nippon Steel Corp | Method for controlling fluidity of molten metal in mold in continuous casting |
IT1288900B1 (en) * | 1996-05-13 | 1998-09-25 | Danieli Off Mecc | CONTINUOUS CASTING PROCESS WITH BUTTON MAGNETIC FIELD AND RELATIVE DEVICE |
JP3267545B2 (en) * | 1997-12-25 | 2002-03-18 | 川崎製鉄株式会社 | Continuous casting method |
MXPA01000508A (en) * | 1998-07-24 | 2002-11-29 | Gibbs Die Casting Aluminum | Semi-solid casting apparatus and method. |
JP2000061599A (en) * | 1998-08-26 | 2000-02-29 | Sumitomo Metal Ind Ltd | Continuous casting method |
FR2801523B1 (en) * | 1999-11-25 | 2001-12-28 | Usinor | CONTINUOUS CASTING PROCESS FOR METALS OF THE TYPE USING ELECTROMAGNETIC FIELDS, AND LINGOTIERE AND CASTING PLANT FOR IMPLEMENTING SAME |
JP3417906B2 (en) * | 2000-07-07 | 2003-06-16 | 株式会社神戸製鋼所 | Electromagnetic stirring method in continuous casting mold |
JP3651441B2 (en) * | 2002-01-31 | 2005-05-25 | Jfeスチール株式会社 | Continuous casting method of steel |
JP4256723B2 (en) * | 2003-06-05 | 2009-04-22 | 新日本製鐵株式会社 | Continuous casting method for molten steel |
JP2005238276A (en) * | 2004-02-26 | 2005-09-08 | Nippon Steel Corp | Electromagnetic-stirring casting apparatus |
JP4553639B2 (en) * | 2004-06-17 | 2010-09-29 | 株式会社神戸製鋼所 | Continuous casting method |
JP4441384B2 (en) * | 2004-07-07 | 2010-03-31 | 新日本製鐵株式会社 | Continuous casting method and flow control device in strand pool |
-
2007
- 2007-04-25 RU RU2008141879/02A patent/RU2419508C2/en not_active IP Right Cessation
- 2007-04-25 EP EP07748430A patent/EP2010346A4/en not_active Withdrawn
- 2007-04-25 JP JP2009507643A patent/JP2009535216A/en active Pending
- 2007-04-25 KR KR1020087025099A patent/KR20090016445A/en not_active Application Discontinuation
- 2007-04-25 CN CN2007800111680A patent/CN101410204B/en not_active Expired - Fee Related
- 2007-04-25 WO PCT/SE2007/050269 patent/WO2007123485A1/en active Application Filing
- 2007-04-25 US US12/298,537 patent/US20090255642A1/en not_active Abandoned
-
2012
- 2012-02-22 US US13/402,144 patent/US20120199308A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5717355A (en) * | 1980-07-02 | 1982-01-29 | Nippon Kokan Kk <Nkk> | Method for electromagnetic stirring of molten sheet within mold in slab continuous casting |
US4746268A (en) * | 1987-07-29 | 1988-05-24 | Hitachi, Ltd. | End face mechanical shaft seal for use in hydraulic machines and seal ring assembly for use in the shaft seal |
US5085265A (en) * | 1990-03-23 | 1992-02-04 | Nkk Corporation | Method for continuous casting of molten steel and apparatus therefor |
US20030183363A1 (en) * | 2000-07-05 | 2003-10-02 | Anders Lehman | Method and device for controlling stirring in a strand |
US7669638B2 (en) * | 2002-11-29 | 2010-03-02 | Abb Ab | Control system, computer program product, device and method |
Non-Patent Citations (2)
Title |
---|
English Translation of Kawakami et al. JP-57-017355 * |
Machine Translation of JP-57017355 * |
Also Published As
Publication number | Publication date |
---|---|
RU2008141879A (en) | 2010-05-27 |
WO2007123485A1 (en) | 2007-11-01 |
CN101410204B (en) | 2011-03-02 |
EP2010346A4 (en) | 2013-02-20 |
JP2009535216A (en) | 2009-10-01 |
US20090255642A1 (en) | 2009-10-15 |
KR20090016445A (en) | 2009-02-13 |
CN101410204A (en) | 2009-04-15 |
EP2010346A1 (en) | 2009-01-07 |
RU2419508C2 (en) | 2011-05-27 |
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