CA2543600A1 - Magnetic brake for continuous casting moulds - Google Patents
Magnetic brake for continuous casting moulds Download PDFInfo
- Publication number
- CA2543600A1 CA2543600A1 CA002543600A CA2543600A CA2543600A1 CA 2543600 A1 CA2543600 A1 CA 2543600A1 CA 002543600 A CA002543600 A CA 002543600A CA 2543600 A CA2543600 A CA 2543600A CA 2543600 A1 CA2543600 A1 CA 2543600A1
- Authority
- CA
- Canada
- Prior art keywords
- permanent magnets
- continuous casting
- mold
- casting mold
- magnets
- 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
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 50
- 238000009749 continuous casting Methods 0.000 title claims abstract description 19
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 5
- 238000009826 distribution Methods 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000003302 ferromagnetic material Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 2
- 229910052802 copper Inorganic materials 0.000 claims 2
- 239000010949 copper Substances 0.000 claims 2
- 230000006978 adaptation Effects 0.000 claims 1
- 238000005266 casting Methods 0.000 description 9
- 230000004907 flux Effects 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000006698 induction Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000003313 weakening effect Effects 0.000 description 3
- 229910001208 Crucible steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001047 Hard ferrite Inorganic materials 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003756 stirring 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
- 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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Continuous Casting (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to a continuous casting mould, in particular a thin slab mould, whereby the flow of liquid metal is influenced by means of permanent magnets arranged on the mould. The permanent magnets give a varying field strength by means of differing magnet strengths over the width and/or height thereof, or varying separations thereof. In order to vary the magnetic field strength the permanent magnets can be differently adjusted in groups to alter the field strength distribution.
Description
MAGNETIC BRAKE FOR
CONTINUOUS CASTING MOLD
The invention relates to a continuous casting mold, in particular a thin slab mold in which permanent magnets are mounted on a mold for influencing the flow of a liquid metal in the mold by a generated magnetic field, wherein the permanent magnets have, over the width andlor height thereof, different magnetic strengths or are spaced from each other by different distances for a different field strength and for a different field strength distribution, are differently displaceable in groups over the mold, and wherein the permanent magnets are arranged in a water box of the continuous casting mold and are placed so that they are directly abut the mold.
The use of magnetic means for braking and homogenizing the liquid metal flow is a known technique and is described in numerous technical documents.
The installation components, which are described in the documents, have all large masses which make difficult the oscillation of the mold that is necessary for the operation.
The document EP O 880 417 B describes a magnetic brake for casting metal in a mold and which consists of a magnetic core and a coil supplied with AMENDECa, SHEET i permanent current or low-frequency alternating current. There is further provided a return line for closing the magnetic circuit.
The progress in the development in the field of permanent magnets (hard ferrites, rare-earth magnets) opened, meantime, new uses for possible field la strengths of permanent magnets, which permanent magnets appears to be a suitable alternative for use instead of the above-described electrical magnet.
It has already been proposed to replace the electromechanical brake (EMBr) equipment, which was used up to the present for generating the magnetic field (field coils, electrical control, outer yoke for conducting the magnetic flux, etc.), with permanent magnets which are directly mounted on the mold.
The document EP 0568 579 describes a method of controlling the flow of the molten metal in a non-solidif ed metal region of a casting mold, wherein the mold is supplied with at least one primary flow of the molten metal and a cast strand is formed, and wherein at least one static magnetic f eld is generated by poles which are arranged adjacent to the mold and consist of permanent magnets. The magnetic field seines for breaking the primary flow of the molten metal flowing in the mold and for splitting the primary flow and for controlling the produced secondary flow. The magnetic field is so arranged that it acts over the entire width of the strand formed in the mold. The magnetic field should extend in a plane extending perpendicular to the cast direction and at level at which the magnetic field strength reaches its maximal value and can be varied AMENDED
F'T~rm~~~'righl~,HrmnericIWD7~19patapF04050fi.DOC 2 S H E ET
within a range of fiom 60% to 100% of the maximal value, while simultaneously the f eld strength has a maximum value of 500 Gauss at a Ievel with the highest outer surface/meniscus of the moltezi metal. The magnetic f eId is controlled and distributed by providing displaceable magnetic poles and/or adjustable core members.
The document EP 00 40 383 Bl describes a method of stirring the non-solidified region of a cast strand, wherein the strand is formed in a mold, and the cast steel flows tlwough a pouring spout or directly into the mold. There, where the cast steel penetrates the melt already amassed in the mold, at least one static magnetic field is generated that brakes the cast or pouring steel and so splits it that its momentum is weakened or absorbed. The device, which is provided to this end, can be formed of one or several permanent magnets.
F:~Letty N~rigMWmmerichl.07= ~9 pn app oao~os.DOC
Document JP 08155610 discloses a rectangular mold in four corners of which permanent magnets are arranged for generating South and North magnetic fields.
Document EP 0 568 579 A discloses a continuous casting mold in which permanent magnets are arranged on the mold for influencing the flow of a liquid metal, and wherein the magnets have different magnetic field strengths and are adjustable with insertable magnetic and non-magnetic core elements.
Permanent magnets have a substantially smaller configuration at the same magnetic induction field strength and, therefore, a significantly reduced mass.
They do not require any additional means for conducting a magnetic flux in form of an outside yoke. When necessary, it is sufficient to use ferromagnetic materials, which are available in the mold frame, for closing the magnetic flux circuit.
However, use of permanent magnets requires other special procedures. In the state of the art, permanent magnets are used as possible sources of static I~MENDED
F:~Betty VJrightUlemmerich\207,519 repl 041306.doc SHEET
magnetic fields but only as equipment for the case when the magnetic field is generated by current coils with direct current DC or low-frequency alternating current, as discussed above, but not, however, for permanent magnets.
Because permanent magnets have no switch for turning on and off, they require special safety measures for installation and monitoring of the equipment. In distinction from the alternating current drive, special methods of equipment are necessary for operating a continuous casting machine.
With a magnetic brake, there are provided, on both sides of the mold opposite each other, permanent magnets for generating a magnetic field. The induction field strength at this arrangement follows, at a spacing between the permanent magnets in the intermediate space, an equation:
~~ [z-a~
B(z) = 2 ~ Bo ~ cosh h wherein Bo is the induction field strength of one of the permanent magnets, z-distance from one of the magnets, d-distance between the magnets and h-operating height of the magnets. The operating height is determined by AMENDED
F:lBetty WrightlfIemmerich1207,519 rep1041306doc S H E ET
measurement. His the number Pi (=3.14...), and cos is a hyperbolic cosine (see Fig. 1 ).
The object of the invention is to provide, on a continuous casting mold, means for varying the magnetic field strength of permanent magnets.
According to the invention, this object is achieved by differently adjusting the permanent magnets in groups for a different distribution of the field strength.
According to an advantageous embodiment of the invention, the permanent magnets are displaced on displaceable and/or pivotable adjusting means over the mold for adapting the field strength.
This is effected, e.g., by changing the distance of the magnets from each other, advantageously, by pivoting the carrier of the permanent magnets away from the mold. There exist further possibilities by a direct method with rotatable spindles or hydraulic cylinders (see Fig. 2). In case of pivoting of the magnet 1~~~~~~~
5a carrier away from the casting mold, the weakening of the field strength follows the following equation:
~ - I B I I A I cos(<(B,A)), where ~ is magnetic flux, B is magnetic field strength, A is pass-through surface to the casting mold, and cos is cosine of an angle between the vector of the magnetic field strength and the vector of the surface normal of the pass-through surface. The varying of the magnetic flux is effected over the field weakening B according to the equation B (~) and the angle. W case of the mechanical displacement, as changing of the distance, changing of ~ is effected only over the field weakening B according to the above-mentioned equation over B(~).
The rotation facilitates, on one hand, detachment of the magnets fiom the pass-tlwough surface, then, according to the instructions for mounting of these permanent magnets, they are put on an edge and, thereafter, are placed on the can-ier with a constantly diminishing angle (see Fig. 3). The magnets are not placed directly on the can-ier from a ferromagnetic material, rather, to facilitate detachment for rotation or mounting, a layer of a non-ferromagnetic material is AMENDED
F'lBetrv\\'ri~hi\HuruncrichL07~79pa~app0a05DbDCIC 6 S H E ET
provided therebetween. This can be an austenite steel, however, a plastic sheet with a thickness of about lmm suffice. The non-uniform distances of tile magnets to the pass-through surface, which are associated with rotation, are magnetically equalized by a pass-through body, the water box of the casting mold of a fewomagnetic material.
There exist two configurations of the casting mold, a mold with a recess for a magnetic brake advanced from outside, and a configuration with a magnetic brake integrated into the water box. For both cases, the following equipment is necessary:
Casting moldings with window for a magnetic brake applied fi~om outside:
The field strength of the magnetic field, which is generated by permanent magnets, should remain adjustable. To this end, the permanent magnets are mounted on the teeth of a rake that engages the reinforcing ribs of the water box of a casting mold. A device provides for adjustment of the distance of the teeth to the mold by displacement. Thereby, it is possible to vary the strength of the magnetic field. The device can be displaced by a mechanical spindle or a hydraulic cylinder.
F',sem~v~~r~.mwe~~r~.:moyt9 ~m,vcoeosos.DOC 7 Casting molds with an integrated magnetic brake:
The electrical device, which was used for generating a magnetic field, is removed, and then a device for holding the permanent magnets is mounted on an uncovered ferromagnetic block (the pass-tlwough window) in the water box This device is displaceable by rotation and, thus, the magnetic field is varied.
The device can be displaced by a mechanical spindle or by a hydraulic cylinder.
W addition, there exists a possibility to have this device rotate about an axis on the lower edge and, thereby, to provide for changing the distance between the permanent magnets and the fen omagnetic block. This likewise provides for adjusting the magnetic field strength.
Permanent magnets are so strong that they cannot be made as large-surface elements. Such a magnet can explode under its own field strength, i.e., acW
ally be destroyed. One is thus compelled to make large-surface magnets for the width of a continuous casting mold of a plurality of separate magnets which are glued onto a large-surface cawier of a ferromagnetic material, in order to combine magnetic flux densities of the plurality of separate magnets into a large-surface magnetic flux which exercises a metallurgical effect in the mold.
F ~Bem~ ~s'riehl~lemmerichL07.~79 pot app 0~0~06.DOC
It is also of importance that by effecting tile same alignment of the magnetic poles, small magnets are not arbitrarily arranged tightly next to each other and, finally, the same poles should be repelled. Therefore, one is compelled to form the magnet can-ier of several layers because the still open intermediate space of the first layer should be covered ill the second layer by permanent magnets.
Further, with a rake (comb-shaped brake), tile magnets must not only be located on the teeth of the rake but rather on tile back side of the magnet carrier (rake) of a ferromagnetic material and, here, again of several layers, because otheuwise the necessary magnetic flux density in the metallurgical section of the mold would not be reached.
F:vs~m~v~r;gnW ",~ne~~moW~sv",vvoaosos.~oc
CONTINUOUS CASTING MOLD
The invention relates to a continuous casting mold, in particular a thin slab mold in which permanent magnets are mounted on a mold for influencing the flow of a liquid metal in the mold by a generated magnetic field, wherein the permanent magnets have, over the width andlor height thereof, different magnetic strengths or are spaced from each other by different distances for a different field strength and for a different field strength distribution, are differently displaceable in groups over the mold, and wherein the permanent magnets are arranged in a water box of the continuous casting mold and are placed so that they are directly abut the mold.
The use of magnetic means for braking and homogenizing the liquid metal flow is a known technique and is described in numerous technical documents.
The installation components, which are described in the documents, have all large masses which make difficult the oscillation of the mold that is necessary for the operation.
The document EP O 880 417 B describes a magnetic brake for casting metal in a mold and which consists of a magnetic core and a coil supplied with AMENDECa, SHEET i permanent current or low-frequency alternating current. There is further provided a return line for closing the magnetic circuit.
The progress in the development in the field of permanent magnets (hard ferrites, rare-earth magnets) opened, meantime, new uses for possible field la strengths of permanent magnets, which permanent magnets appears to be a suitable alternative for use instead of the above-described electrical magnet.
It has already been proposed to replace the electromechanical brake (EMBr) equipment, which was used up to the present for generating the magnetic field (field coils, electrical control, outer yoke for conducting the magnetic flux, etc.), with permanent magnets which are directly mounted on the mold.
The document EP 0568 579 describes a method of controlling the flow of the molten metal in a non-solidif ed metal region of a casting mold, wherein the mold is supplied with at least one primary flow of the molten metal and a cast strand is formed, and wherein at least one static magnetic f eld is generated by poles which are arranged adjacent to the mold and consist of permanent magnets. The magnetic field seines for breaking the primary flow of the molten metal flowing in the mold and for splitting the primary flow and for controlling the produced secondary flow. The magnetic field is so arranged that it acts over the entire width of the strand formed in the mold. The magnetic field should extend in a plane extending perpendicular to the cast direction and at level at which the magnetic field strength reaches its maximal value and can be varied AMENDED
F'T~rm~~~'righl~,HrmnericIWD7~19patapF04050fi.DOC 2 S H E ET
within a range of fiom 60% to 100% of the maximal value, while simultaneously the f eld strength has a maximum value of 500 Gauss at a Ievel with the highest outer surface/meniscus of the moltezi metal. The magnetic f eId is controlled and distributed by providing displaceable magnetic poles and/or adjustable core members.
The document EP 00 40 383 Bl describes a method of stirring the non-solidified region of a cast strand, wherein the strand is formed in a mold, and the cast steel flows tlwough a pouring spout or directly into the mold. There, where the cast steel penetrates the melt already amassed in the mold, at least one static magnetic field is generated that brakes the cast or pouring steel and so splits it that its momentum is weakened or absorbed. The device, which is provided to this end, can be formed of one or several permanent magnets.
F:~Letty N~rigMWmmerichl.07= ~9 pn app oao~os.DOC
Document JP 08155610 discloses a rectangular mold in four corners of which permanent magnets are arranged for generating South and North magnetic fields.
Document EP 0 568 579 A discloses a continuous casting mold in which permanent magnets are arranged on the mold for influencing the flow of a liquid metal, and wherein the magnets have different magnetic field strengths and are adjustable with insertable magnetic and non-magnetic core elements.
Permanent magnets have a substantially smaller configuration at the same magnetic induction field strength and, therefore, a significantly reduced mass.
They do not require any additional means for conducting a magnetic flux in form of an outside yoke. When necessary, it is sufficient to use ferromagnetic materials, which are available in the mold frame, for closing the magnetic flux circuit.
However, use of permanent magnets requires other special procedures. In the state of the art, permanent magnets are used as possible sources of static I~MENDED
F:~Betty VJrightUlemmerich\207,519 repl 041306.doc SHEET
magnetic fields but only as equipment for the case when the magnetic field is generated by current coils with direct current DC or low-frequency alternating current, as discussed above, but not, however, for permanent magnets.
Because permanent magnets have no switch for turning on and off, they require special safety measures for installation and monitoring of the equipment. In distinction from the alternating current drive, special methods of equipment are necessary for operating a continuous casting machine.
With a magnetic brake, there are provided, on both sides of the mold opposite each other, permanent magnets for generating a magnetic field. The induction field strength at this arrangement follows, at a spacing between the permanent magnets in the intermediate space, an equation:
~~ [z-a~
B(z) = 2 ~ Bo ~ cosh h wherein Bo is the induction field strength of one of the permanent magnets, z-distance from one of the magnets, d-distance between the magnets and h-operating height of the magnets. The operating height is determined by AMENDED
F:lBetty WrightlfIemmerich1207,519 rep1041306doc S H E ET
measurement. His the number Pi (=3.14...), and cos is a hyperbolic cosine (see Fig. 1 ).
The object of the invention is to provide, on a continuous casting mold, means for varying the magnetic field strength of permanent magnets.
According to the invention, this object is achieved by differently adjusting the permanent magnets in groups for a different distribution of the field strength.
According to an advantageous embodiment of the invention, the permanent magnets are displaced on displaceable and/or pivotable adjusting means over the mold for adapting the field strength.
This is effected, e.g., by changing the distance of the magnets from each other, advantageously, by pivoting the carrier of the permanent magnets away from the mold. There exist further possibilities by a direct method with rotatable spindles or hydraulic cylinders (see Fig. 2). In case of pivoting of the magnet 1~~~~~~~
5a carrier away from the casting mold, the weakening of the field strength follows the following equation:
~ - I B I I A I cos(<(B,A)), where ~ is magnetic flux, B is magnetic field strength, A is pass-through surface to the casting mold, and cos is cosine of an angle between the vector of the magnetic field strength and the vector of the surface normal of the pass-through surface. The varying of the magnetic flux is effected over the field weakening B according to the equation B (~) and the angle. W case of the mechanical displacement, as changing of the distance, changing of ~ is effected only over the field weakening B according to the above-mentioned equation over B(~).
The rotation facilitates, on one hand, detachment of the magnets fiom the pass-tlwough surface, then, according to the instructions for mounting of these permanent magnets, they are put on an edge and, thereafter, are placed on the can-ier with a constantly diminishing angle (see Fig. 3). The magnets are not placed directly on the can-ier from a ferromagnetic material, rather, to facilitate detachment for rotation or mounting, a layer of a non-ferromagnetic material is AMENDED
F'lBetrv\\'ri~hi\HuruncrichL07~79pa~app0a05DbDCIC 6 S H E ET
provided therebetween. This can be an austenite steel, however, a plastic sheet with a thickness of about lmm suffice. The non-uniform distances of tile magnets to the pass-through surface, which are associated with rotation, are magnetically equalized by a pass-through body, the water box of the casting mold of a fewomagnetic material.
There exist two configurations of the casting mold, a mold with a recess for a magnetic brake advanced from outside, and a configuration with a magnetic brake integrated into the water box. For both cases, the following equipment is necessary:
Casting moldings with window for a magnetic brake applied fi~om outside:
The field strength of the magnetic field, which is generated by permanent magnets, should remain adjustable. To this end, the permanent magnets are mounted on the teeth of a rake that engages the reinforcing ribs of the water box of a casting mold. A device provides for adjustment of the distance of the teeth to the mold by displacement. Thereby, it is possible to vary the strength of the magnetic field. The device can be displaced by a mechanical spindle or a hydraulic cylinder.
F',sem~v~~r~.mwe~~r~.:moyt9 ~m,vcoeosos.DOC 7 Casting molds with an integrated magnetic brake:
The electrical device, which was used for generating a magnetic field, is removed, and then a device for holding the permanent magnets is mounted on an uncovered ferromagnetic block (the pass-tlwough window) in the water box This device is displaceable by rotation and, thus, the magnetic field is varied.
The device can be displaced by a mechanical spindle or by a hydraulic cylinder.
W addition, there exists a possibility to have this device rotate about an axis on the lower edge and, thereby, to provide for changing the distance between the permanent magnets and the fen omagnetic block. This likewise provides for adjusting the magnetic field strength.
Permanent magnets are so strong that they cannot be made as large-surface elements. Such a magnet can explode under its own field strength, i.e., acW
ally be destroyed. One is thus compelled to make large-surface magnets for the width of a continuous casting mold of a plurality of separate magnets which are glued onto a large-surface cawier of a ferromagnetic material, in order to combine magnetic flux densities of the plurality of separate magnets into a large-surface magnetic flux which exercises a metallurgical effect in the mold.
F ~Bem~ ~s'riehl~lemmerichL07.~79 pot app 0~0~06.DOC
It is also of importance that by effecting tile same alignment of the magnetic poles, small magnets are not arbitrarily arranged tightly next to each other and, finally, the same poles should be repelled. Therefore, one is compelled to form the magnet can-ier of several layers because the still open intermediate space of the first layer should be covered ill the second layer by permanent magnets.
Further, with a rake (comb-shaped brake), tile magnets must not only be located on the teeth of the rake but rather on tile back side of the magnet carrier (rake) of a ferromagnetic material and, here, again of several layers, because otheuwise the necessary magnetic flux density in the metallurgical section of the mold would not be reached.
F:vs~m~v~r;gnW ",~ne~~moW~sv",vvoaosos.~oc
Claims (8)
1. A continuous casting mold, in particular a thin slab mold in which permanent magnets are mounted on a mold for influencing the flow of a liquid metal in the mold by a generated magnetic field, wherein the permanent magnets have, over the width and/or height thereof, different magnetic strengths or are spaced from each other by different distances for a different field strength and for a different field strength distribu-tion, are differently displaceable in groups over the mold, and wherein the permanent magnets are arranged in a water box of the continuous casting mold and are placed so that they are directly abut the mold, characterized in that the permanent magnets are displaceable on pivotable adjusting means on the mold for adaptation of field strength.
2. A continuous casting mold according to claim 1, characterized in that adjusting means for the permanent magnets is formed as rotating devices or rotating spindles.
3. A continuous casting mold according to claim 1 or 2, characterized in that the adjusting means for the permanent magnets is formed as rotating devices, hydraulic cylinders, or rotating spindles.
4. A continuous casting mold according to claim 1, 2, or 3, characterized in that between the magnets and a copper plate, an iron core is arranged.
5. A continuous casting mold according to claim 1, 2, or 3, characterized in that the permanent magnets are arranged in a water box of the continuous casting hold and for directly abutting the mold plate.
6. A continuous casting mold according to one or several of claims 1 through 4, characterized in that an iron core, as a pass-through body of the water box, fills space between the copper plate and a permanent magnet.
7. A continuous casting mold according to claim 6 characterized in that between the pass-through body and the adjustable permanent magnets, a separation plate, which is formed, preferably, of non-ferromagnetic material or plastic material, is inserted.
8. A continuous casting mold according to one or several of claims 1 through 7, characterized in that the permanent magnets consist of a plurality of small separate magnets which are arranged on a large-surface carrier of a ferromagnetic material and are operatively corrected in several layers to form a large surface magnets.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10359409.4 | 2003-12-18 | ||
| DE10359409 | 2003-12-18 | ||
| DE102004046729.3 | 2004-09-25 | ||
| DE102004046729A DE102004046729A1 (en) | 2003-12-18 | 2004-09-25 | Continuous casting mold, especially a thin slab mold, used in the continuous casting of metals comprises permanent magnets which give a varying filed strength using differing magnet strengths over the width and/or height |
| PCT/EP2004/013444 WO2005058530A1 (en) | 2003-12-18 | 2004-11-26 | Magnetic brake for continuous casting moulds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2543600A1 true CA2543600A1 (en) | 2005-06-30 |
Family
ID=34701994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002543600A Abandoned CA2543600A1 (en) | 2003-12-18 | 2004-11-26 | Magnetic brake for continuous casting moulds |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20070089851A1 (en) |
| EP (1) | EP1694455B1 (en) |
| JP (1) | JP2007534492A (en) |
| KR (1) | KR20060120022A (en) |
| AT (1) | ATE365087T1 (en) |
| CA (1) | CA2543600A1 (en) |
| DE (1) | DE502004004157D1 (en) |
| ES (1) | ES2287797T3 (en) |
| WO (1) | WO2005058530A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009029889A1 (en) * | 2008-07-15 | 2010-02-18 | Sms Siemag Ag | Electromagnetic brake device on continuous casting molds |
| JP5079681B2 (en) * | 2008-12-25 | 2012-11-21 | 株式会社神戸製鋼所 | Continuous casting equipment for slab in which static magnetic field acts on upward flow of molten steel in mold |
| DE102010022691A1 (en) * | 2010-06-04 | 2011-12-08 | Sms Siemag Ag | Continuous casting apparatus with an arrangement of electromagnetic coils |
| KR101526454B1 (en) * | 2013-11-22 | 2015-06-05 | 주식회사 포스코 | Apparatus and method for electromagnetic stirring |
| MX2016015675A (en) * | 2014-06-16 | 2017-07-04 | Abb Schweiz Ag | Non-magnetic steel structure for a steel or aluminium making process. |
| DE102015204123A1 (en) | 2014-07-04 | 2016-01-07 | Sms Group Gmbh | Device for influencing a flow of a liquid metal within a continuous casting mold |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2628994B1 (en) * | 1988-03-28 | 1992-04-03 | Vives Charles | PROCESS FOR PRODUCING THIXOTROPIC METAL JELLIES BY ROTATION OF A PERMANENT MAGNET SYSTEM PROVIDED OUTSIDE THE LINGOTIERE |
| KR930002836B1 (en) * | 1989-04-27 | 1993-04-10 | 가와사끼 세이데쓰 가부시까가이샤 | Method and apparatus for continuous casting |
| SE500745C2 (en) * | 1991-01-21 | 1994-08-22 | Asea Brown Boveri | Methods and apparatus for casting in mold |
| AU714976B2 (en) * | 1996-04-29 | 2000-01-13 | Bhp Steel (Jla) Pty Limited | Magnetic braking |
| SE523157C2 (en) * | 1997-09-03 | 2004-03-30 | Abb Ab | Method and apparatus for controlling the metal flow during extrusion by electromagnetic fields |
| DE10146993A1 (en) * | 2001-09-25 | 2003-04-10 | Sms Demag Ag | Electromagnetic brake device for the mold of a continuous caster |
-
2004
- 2004-11-26 DE DE502004004157T patent/DE502004004157D1/en active Active
- 2004-11-26 CA CA002543600A patent/CA2543600A1/en not_active Abandoned
- 2004-11-26 US US10/580,723 patent/US20070089851A1/en not_active Abandoned
- 2004-11-26 AT AT04803301T patent/ATE365087T1/en active
- 2004-11-26 JP JP2006544255A patent/JP2007534492A/en active Pending
- 2004-11-26 WO PCT/EP2004/013444 patent/WO2005058530A1/en active IP Right Grant
- 2004-11-26 KR KR1020067006735A patent/KR20060120022A/en not_active Application Discontinuation
- 2004-11-26 EP EP04803301A patent/EP1694455B1/en not_active Not-in-force
- 2004-11-26 ES ES04803301T patent/ES2287797T3/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| ES2287797T3 (en) | 2007-12-16 |
| EP1694455A1 (en) | 2006-08-30 |
| WO2005058530A1 (en) | 2005-06-30 |
| ATE365087T1 (en) | 2007-07-15 |
| JP2007534492A (en) | 2007-11-29 |
| US20070089851A1 (en) | 2007-04-26 |
| EP1694455B1 (en) | 2007-06-20 |
| DE502004004157D1 (en) | 2007-08-02 |
| KR20060120022A (en) | 2006-11-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |
Effective date: 20121126 |