EP3766600A1 - Syst?me de bobine électromagnétique et rouleau d'agitation électromagnétique pour une installation de coulée continue - Google Patents

Syst?me de bobine électromagnétique et rouleau d'agitation électromagnétique pour une installation de coulée continue Download PDF

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Publication number
EP3766600A1
EP3766600A1 EP20185987.3A EP20185987A EP3766600A1 EP 3766600 A1 EP3766600 A1 EP 3766600A1 EP 20185987 A EP20185987 A EP 20185987A EP 3766600 A1 EP3766600 A1 EP 3766600A1
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EP
European Patent Office
Prior art keywords
coil winding
iron core
electromagnetic
coil arrangement
stacks
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
Application number
EP20185987.3A
Other languages
German (de)
English (en)
Other versions
EP3766600B1 (fr
Inventor
Peter Paul WIMMER
Martin Hirschmanner
Felix LINDLBAUER
Andreas ROHRHOFER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Primetals Technologies Austria GmbH
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Primetals Technologies Austria 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.)
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Publication date
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Publication of EP3766600A1 publication Critical patent/EP3766600A1/fr
Application granted granted Critical
Publication of EP3766600B1 publication Critical patent/EP3766600B1/fr
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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
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/122—Accessories for subsequent treating or working cast stock in situ 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1287—Rolls; Lubricating, cooling or heating rolls while in use
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/14—Tools, e.g. nozzles, rollers, calenders
    • H05B6/145—Heated rollers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/34—Arrangements for circulation of melts
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/44—Coil arrangements having more than one coil or coil segment

Definitions

  • electromagnetic stirrers are used for the production of high-quality electrical steels. If the stirrer is in the area of the so-called casting arch, it is referred to as a strand stirrer. If the electromagnetic stirrer is installed in a roll of a segment of the continuous casting plant, it is called a stirring roll.
  • the strand stirrer generates a stirring force in the liquid area of the strand, which moves the liquid steel horizontally along a casting production width and creates a butterfly-like flow pattern in the liquid steel.
  • the structure looks usually a pair of rollers which act on the strand either from both sides or next to each other. Such stirring rollers are for example from the documents US2015 / 0290703 A1 and US2013 / 0008624 A1 known.
  • These agitator rollers consist of an iron core and coil winding packages.
  • These coil winding packages consist of a wire that is wound into a large number of adjacent turns and layers on top of each other. The wire is covered with an electrical insulation layer.
  • the current-carrying winding stacks surrounding the iron core generate the magnetic flux, which is dependent on the number of turns and the current strength in the windings.
  • the magnitude of the magnetic flux density in turn determines the strength of the stirring force of the electromagnetic stirrer.
  • the ohmic resistance of the windings creates a certain power loss, which is converted into heat and has to be dissipated by cooling.
  • the electrical insulation layer is a poor conductor of heat, as a result of which the heat of the lower layers of the winding stacks is poorly transported to the outside, where the heat can be dissipated particularly effectively. There is thus the problem for a lowermost layer of the winding that the maximum temperature of the insulation layer is reached after a certain time and therefore the current intensity must be limited. This then leads to the fact that the stirring power is limited accordingly.
  • the object of this invention is to create an electromagnetic coil arrangement and an electromagnetic agitator roller of the type mentioned at the outset, which enables effective heat dissipation - the heat generated in the coil winding stacks - around the To be able to operate the electromagnetic coil arrangement and the electromagnetic stirring roller with the highest possible power.
  • the object is achieved in that the at least two coil winding stacks enclose the iron core in partial areas along the first longitudinal extent.
  • the first longitudinal extension is to be understood as an iron core length.
  • the coil winding stacks consist of a maximum of two superimposed layers, preferably only one layer, and a large number of turns lying next to one another.
  • the respective coil winding package therefore consists of a large number of turns that are wound next to one another and of a maximum of two layers lying one above the other.
  • the number of turns is determined by calculations and depends on a maximum available voltage and a maximum current density at a certain stirring frequency. The goal is always to provide the highest possible stirring effect, i.e. the highest possible magnetic flux density.
  • the individual turns are covered with an insulating material so that the individual turns are electrically isolated from one another.
  • the insulating material is preferably a polyimide film.
  • the coil winding stacks are designed in such a way that they can be pushed onto the iron core from an end face of the iron core up to an intended installation position for installation on the iron core. When pushed on, the coil winding stacks have internal dimensions which are larger than the external dimensions of the iron core in order to allow the coil winding stacks to be pushed onto the iron core. This design is intended to enable the coil winding packs to be produced without an iron core and for the coil winding pack and iron core to be assembled separately.
  • the coil winding stacks can be enlarged in their dimensions during assembly by widening, such as heating or twisting the windings, in order to facilitate or enable them to be pushed on.
  • the coil winding packages are thus designed so that they are in a shape for assembly or can be brought into a shape to enable them to be pushed onto the support tube.
  • the coil winding stacks have a protective layer for protection and insulation. This protective layer completely encloses the coil winding packages.
  • the protective layer surrounds the coil winding stacks in such a way that at least one outer side and both lateral surfaces of the respective coil winding stacks are surrounded by the protective layer.
  • the fastening stubs are arranged on the end of the iron core.
  • the electrical connection contacts are each connected to at least one coil winding package.
  • a preferred arrangement of the electrical connection contacts is on the end faces of the fastening stub.
  • the fastening stubs have bushings which allow the electrical connection contacts to be guided to an end face of the fastening stub that can be seen from the outside.
  • the coil winding stacks can then be electrically connected to this end face via the connection contacts.
  • the function of the fastening stubs is to be able to mount the coil arrangement on a bearing block.
  • the design of the coil winding packages with a maximum of two layers allows the heat to be dissipated more easily.
  • a particularly preferred embodiment is that the turns have a rectangular cross section, the dimensions of the turn being larger in the radial direction than in the axial direction.
  • the ratio of the dimension in the axial direction - i.e. a width of a cross section of the turn - to the dimension in the radial direction - i.e. a height of a cross section of the turn - is preferably in a range from 1/3 to 1/8, particularly preferably 1/4 to 1/6.
  • the turns are therefore designed as so-called standing turns. Due to the rectangular cross section, several narrow and high turns can be arranged next to one another in order to obtain the desired number of turns and still produce a compact coil winding package. In this context, rectangular is also understood to mean that the corners can have rounded portions which ensure easier assembly when assembling the coil winding arrangement.
  • the iron core has at least one cooling channel.
  • the arrangement of at least one cooling channel can Heat that arises in the iron core can be dissipated particularly effectively.
  • the protective tube extends at least over the two coil winding packages.
  • One possible design of the protective tube is that it consists of several parts and existing joints are sealed - for example with glued metal strips.
  • the gaps between the protective tube and the coil winding packages are filled with filler material.
  • the filling compound means that the heat is transferred to the inside of the protective tube to the greatest possible extent.
  • This protective tube is made of a material that conducts heat well, preferably non-magnetic steel, and thus conducts the heat from an inside to an outside of the protective tube.
  • the filling compound has a greater thermal conductivity 0 , 1 W. mK , preferably larger 1 W. mK , having.
  • the filling compound with this thermal conductivity ensures particularly good dissipation of heat from the coil winding stacks to the protective tube.
  • An expedient embodiment provides that the iron core is arranged in a hollow support tube with a second longitudinal extension.
  • the support tube thus has a hollow cross-section and extends along a longitudinal axis.
  • the support tube has a support tube length which is in the order of magnitude of the casting production width.
  • the iron core can be stabilized over the casting production width through the support tube.
  • the support tube has a plurality of slots, in particular at least two, preferably at least four, particularly preferably at least six, very particularly, along the second longitudinal extension preferably eight slots, each with a predetermined slot area.
  • the iron core is designed in such a way that in each case a partial volume of the iron core can be pushed into one of these slots, the respective partial volumes preferably completely fill the respective slots.
  • the design with several slots has the advantage that the pipe is prevented from expanding due to possible internal mechanical stresses in the pipe by means of webs located between the slots. This embodiment therefore provides that there are between three and ten slots which are arranged along the second longitudinal extent.
  • the iron core has a partial volume for each slot, which can be pushed into the slots.
  • the webs in the iron core must also be shown as negative so that the partial volumes can be pushed into the respective slots.
  • cooling channels are arranged next to the iron core within the support tube. These cooling channels run close to the iron core in order to dissipate the resulting heat as effectively as possible.
  • the cooling channels can be designed as a tube which is pushed into the support tube next to the iron core.
  • slot surface is rectangular. This design is preferred because it achieves the largest possible slot area.
  • the electrical connection contacts have a bolt with a bolt cross-sectional area which can transmit the required energy to the coil winding stacks, as well as a Fastening bolt stub, with a fastening cross-sectional area.
  • the bolt cross-sectional area and the fastening cross-sectional area have a ratio of 1.7 to 4.
  • the connection contact should, on the one hand, be able to transmit the required energy to the coil winding stacks and, on the other hand, have a reliable fastening.
  • the connection of electrical supply cables to the connection contacts should preferably take place via a cable lug.
  • the cable lug is pushed onto the fastening stub, which must be fixed in such a way that it has good contact with the cross-sectional area of the bolt. This is preferably done in that the fastening bolt has a thread and the cable lug is pressed against the fastening cross-sectional area by screwing on a nut.
  • the contacts require less space due to the reduced mounting cross-sectional area. This design makes it possible that the connection contacts - despite the limited space requirement - can be arranged on the end faces of the fastening stubs.
  • a particularly preferred embodiment provides that the coil winding stacks closest to the fastening stubs and all coil winding stacks electrically connected to them have a higher total number of turns than a total number of turns of all other coil winding stacks - each electrically connected to one another.
  • the coil winding stacks that are placed on the edge have a larger air gap, since magnetic field lines emerge at least partially over one of the two end faces of the iron core. As a result, these coil winding stacks have a greater length of the air gap l air in the magnetic circuit compared to those coil winding stacks which are not placed at the edge exhibit. It follows from this that a total magnetic resistance R m, tot (cf. equation 4) is higher and the inductance therefore decreases.
  • the inductance L is calculated using equation 1, where N is the number of turns.
  • the magnetic resistance in the air gap is calculated according to equation 2, where ⁇ 0 is the permeability of vacuum and A is the cross-sectional area of the magnetic conductor.
  • Equation 3 shows the formula for the magnetic resistance in iron, where ⁇ r is the relative permeability of the iron core.
  • the embodiment according to the invention provides that all coil winding packages connected to one electrical contact each have almost the same inductivity.
  • the inductance can be changed either via the number of turns N or via the magnetic resistance R m, tot .
  • the simplest implementation results from the adaptation of the Number of turns.
  • the coil winding stacks connected to the individual electrical connection contacts should have almost the same current-carrying capacity and inductivity by adjusting the total number of turns. With this solution, it is possible to increase the electrical power of the agitator roller in the size range of 5% with the same space conditions. This takes place through an ideal - that is, equal - current distribution to all coil winding stacks of the electromagnetic coil winding arrangement.
  • the electrical coil winding arrangement has three electrical connection contacts and the number of coil winding stacks corresponds to a multiple of three plus two.
  • the number of coil winding stacks is therefore for example at least five, preferably at least eight, particularly preferably at least eleven, very particularly preferably fourteen.
  • the coil winding stacks closest to the fastening stubs have a smaller number of turns than the remaining coil winding stacks.
  • the coil winding stacks which are arranged in the vicinity of the fastening stub, that is to say are arranged on the edge of the iron core serve as so-called compensating coil winding stacks.
  • a connection contact is connected to the two coil winding packages closest to the fastening stub.
  • the number of turns of the compensating coil winding stacks is greater than half the number of turns but smaller than the number of turns of the remaining coil winding stacks.
  • Another embodiment is that in each case two electrical connection contacts are connected to a compensating coil winding package.
  • the electromagnetic coil winding arrangement has three electrical connection contacts.
  • the number of coil winding packs is at least three or one Multiples of three.
  • the respective coil winding stacks closest to the fastening stubs have a greater number of turns than the remaining coil winding stacks.
  • at least two electrical connection contacts are connected to a coil winding package that is closest to the fastening stubs.
  • the object according to the invention is achieved by the electromagnetic stirring roller mentioned at the beginning.
  • the electromagnetic coil arrangement described above is arranged within the reel.
  • the electromagnetic coil arrangement is fixed to a bearing block on both sides.
  • a cooling channel is formed between the tube and the coil arrangement and is connected to the inflow and the outflow.
  • the role has a supporting effect on the strand.
  • This arrangement results in an electromagnetic stirring roller, which achieves a greater magnetic flux and thus an increased stirring effect with the same electrical connection power and size.
  • the roller is rotatably mounted on both sides of the bearing block. This design has proven to be a particularly robust design. Another design is that the storage takes place on the fastening stubs.
  • FIG. 1 an embodiment of the coil winding arrangement 1 according to the invention is shown.
  • the iron core 2 has a first longitudinal extension L1.
  • This first longitudinal extension L1 results from an extension from a left to a right fastening stub 12.
  • the first longitudinal extension L1 is therefore to be understood as a length of the iron core.
  • the coil winding stacks 10 have two layers 11a and a plurality of turns 11b. The individual turns 11b are covered with an insulating material.
  • Fastening stubs 12 are arranged on each end face of the iron core.
  • the electrical contacts 15 are also located on the fastening stubs 12. These electrical contacts 15 connect the coil winding packages 10 to an electrical power supply.
  • the coil winding stacks 10 are enclosed with a protective layer 13a so that they are protected against mechanical wear and electrically isolated from the outside.
  • the coil winding stacks 10 are designed such that they can be pushed on for assembly from an end face 6a up to an assembly position 6b.
  • a coil winding arrangement 1 according to the invention is shown.
  • the iron core 2 is arranged in a hollow support tube 3.
  • the hollow support tube 3 is - in this exemplary embodiment - enclosed by two coil winding stacks 11.
  • the fastening stubs 12, which are used to fix the coil winding arrangement 1 in a stirring roller, are attached to the end face of the support tube 3.
  • the electrical contacts 15 are guided inwards through the fastening stubs 12 to the coil winding stacks. This electrical connection exists on both sides, ie on the left fastening stub 12 and on the right fastening stub 12. Different electrical phases are connected to the electrical contacts 15 on one side.
  • the coil winding arrangement can be supplied with a two-phase system.
  • the at least two electrical contacts 15 have no mutual electrical connection.
  • the coil winding stacks 10 are surrounded by a protective tube 13. Gaps present between the coil winding stacks 10 and the protective tube 13 are filled with a filling compound 14.
  • the Fig. 3 differs from Fig. 2 in that six coil winding stacks are arranged along the first longitudinal extension. These coil winding stacks each have only one layer 11a and a plurality of turns 11b.
  • Several slots 4 are present in the support tube 3. The individual slots 4 are each separated from one another by a web 5. These webs 5 have the function of preventing the support tube 3 from expanding when the slot is created.
  • the webs are arranged in such a way that, in a preferred embodiment, they are completely enclosed by a coil winding set - that is, the webs 5 are located under a coil winding set 10.
  • the iron core 2 is designed in this embodiment with several slots 4 so that it also has a number of partial volumes of the according to the number of slots Has iron core 2a, which almost completely fill the respective slots 4.
  • the partial volumes of the iron core 2a are shown by the vertical hatching.
  • the coil winding stacks 10 are surrounded by a protective tube 13. Gaps present between the coil winding stacks 10 and the protective tube 13 are filled with a filling compound 14.
  • FIG Fig. 4 The cross section of a coil winding arrangement is shown in FIG Fig. 4 shown.
  • the iron core 2 - which has a cross section A - is arranged in the support tube 3.
  • the partial volume of the iron core 2a is pushed into the slot 4 of the support tube 3.
  • the partial volume of the iron core 2a almost fills the slot, but there is a small gap on the left and right to enable it to be pushed in.
  • the coil winding stacks 3 enclose the iron core 2 and the support tube 3, the coil winding stacks 10 having two layers 11a.
  • the coil winding stacks 10 are enclosed by the protective tube 13, a remaining space being filled with filling compound 14. Cooling channels 20 are arranged next to the iron core.
  • Fig. 5 In addition to the cooling channels 20, there is a cooling channel in the iron core 21.
  • the arrangement of the cooling channels shown here is only an example; it is also conceivable that only the cooling channels 20 or only the cooling channels are present in the iron core 21.
  • the Fig. 6 shows a stirring roller 30 for a continuous casting plant.
  • the agitator roller 30 comprises the coil winding arrangement 1 and a roller 31 which supports a strand produced by the continuous casting plant.
  • the coil winding arrangement 1 is fixed on both sides in a respective bearing block 36 - via the fastening stub 12.
  • the roller 31 is rotatably mounted on both sides.
  • the bearing 35 is arranged in the bearing block 36.
  • a coolant can be supplied by an inflow of coolant 32 and removed again by an outflow of coolant.
  • the electrical contacts 15 are each connected to a coil winding package 10.
  • Fig. 7 a preferred embodiment of the coil winding stacks 10 is shown.
  • the coil winding stacks consist of a layer 11a and a plurality of turns 11b.
  • the single-layer design ensures particularly good dissipation of the heat to the outside to the protective tube 13 or the insulating layer 13a (not shown).
  • Fig. 8 an alternative embodiment of the coil winding stacks 10 is shown.
  • the coil winding stacks 10 have two layers 11a and each layer 11a has a plurality of turns 11b.
  • FIG. 9 A schematic representation of one embodiment of the coil winding assembly is shown.
  • the iron core 2 with a cross section and a first longitudinal extension is enclosed along the first longitudinal extension by a plurality of coil winding stacks 10u, 10v, 10w.
  • the coil winding packs of phase u 10u has a greater number of turns 11b than the coil winding pack of phase v 10v and the coil winding pack of phase w 10w.
  • two coil winding packages are connected to each of the three phases.
  • Phase u and phase w are each connected to a coil winding package 10u, 10w, which is closest to the fastening stub.
  • coil winding stacks 10u, 10w connected to the phases u and phase w have a higher number of turns than the coil winding stacks 10v connected to the phase v.
  • the coil winding stacks 10u, 10v, 10w connected to the individual phases u, v, w should have a number of turns that have almost the same current carrying capacity and almost the same inductance.
  • the number of coil winding packages is a multiple of three - for example three, six, nine, twelve, etc.
  • Fig. 10 is another schematic representation of an embodiment of the invention.
  • only phase u has an electrical connection to coil winding stacks 10u which are closest to the end faces of iron core 2 or the fastening stub (not shown).
  • the coil winding stacks 10u connected to the phase u have a higher number of turns than the coil winding stacks 10v, 10w connected to the phase v and the phase w.
  • connection contacts 15 are shown as a plan view.
  • the space required on the fastening stub 12 for connecting three phases is small. On the one hand, it must be ensured that the required current can be conducted via the electrical connection contacts 15 and, on the other hand, secure attachment can take place.
  • An electrical connection cable is fastened in a cable lug 43 and pressed tightly against the electrical connection contact 15 with a fastening element 42 - in the present example a nut.
  • Fig. 12 is a floor plan and elevation of the in Fig. 10 described connection contacts shown schematically.
  • the cable lug 43 is firmly pressed onto the bolt cross section 40a by means of a fastening element (nut) 42 and a washer 44.
  • the fastening bolt 41 has a fastening bolt cross section 41a.
  • the ratio of bolt cross section 40a and fastening bolt cross section 41a is in a preferred embodiment in the ratio 1.7 to 4.
  • the bolt 40 is advantageously designed with a round cross section and the fastening bolt 41 has a thread.
  • a ratio of the bolt diameter to the fastening bolt thread diameter - the nominal thread diameter being used here - is between 1.3 and 2.
  • FIG. 13 is an enlarged view of an electrical connection contact, with the bolt 40, the cable lug 43, the washer 44 and the fastening element 42 which is screwed onto the fastening bolt 41, is shown.
  • a further preferred embodiment is shown, which differs from that in Fig. 12 differs in that a washer 44 is attached on both sides of the cable lug 43.
  • the washer 44 that rests on the bolt 40 can also be rigidly connected to the bolt - for example by being welded to the bolt 40. But it is also conceivable that instead of the washer - which rests on the bolt - a nut is screwed onto the bolt or the fastening bolt.
  • a support tube 3 with a plurality of slots 4 is shown.
  • the webs 5 are located between the slots 4.
  • the partial volumes of the iron core can be pushed into the slots 4.
  • a coil winding package 10 is shown with one layer. Typical dimensions of the turns of the coil winding package 10 are a width of 3 mm and a height of 12 mm.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP20185987.3A 2019-07-17 2020-07-15 Dispositif a bobine electromagnetique pour un rouleau agitateur electromagnetique d'une installation de coulee continue Active EP3766600B1 (fr)

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AT506472019 2019-07-17

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EP3766600A1 true EP3766600A1 (fr) 2021-01-20
EP3766600B1 EP3766600B1 (fr) 2022-09-07

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995678A (en) * 1976-02-20 1976-12-07 Republic Steel Corporation Induction stirring in continuous casting
US4429731A (en) * 1980-11-25 1984-02-07 Cem Compagnie Electro-Mecanique Translating field inductor for producing a directionally oriented flux within the stirring roller of a continuous caster for slabs
SU1616770A1 (ru) * 1988-06-22 1990-12-30 Ленинградское Производственное Электромашиностроительное Объединение "Электросила" Им.С.М.Кирова Устройство дл электромагнитного перемешивани жидкой сердцевины непрерывного слитка
EP2269750A1 (fr) * 2008-04-28 2011-01-05 Sumitomo Metal Industries, Ltd. Procédé de coulée en continu d'acier et agitateur électromagnétique utilisable pour celui-ci
US20130008624A1 (en) 2010-03-23 2013-01-10 Rotelec Stirring-roller for a continuous slab-casting machine
US20150290703A1 (en) 2012-03-27 2015-10-15 Rotelec Stirring-roll for a continuous cast machine of metallic products of large cross section

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995678A (en) * 1976-02-20 1976-12-07 Republic Steel Corporation Induction stirring in continuous casting
US4429731A (en) * 1980-11-25 1984-02-07 Cem Compagnie Electro-Mecanique Translating field inductor for producing a directionally oriented flux within the stirring roller of a continuous caster for slabs
SU1616770A1 (ru) * 1988-06-22 1990-12-30 Ленинградское Производственное Электромашиностроительное Объединение "Электросила" Им.С.М.Кирова Устройство дл электромагнитного перемешивани жидкой сердцевины непрерывного слитка
EP2269750A1 (fr) * 2008-04-28 2011-01-05 Sumitomo Metal Industries, Ltd. Procédé de coulée en continu d'acier et agitateur électromagnétique utilisable pour celui-ci
US20130008624A1 (en) 2010-03-23 2013-01-10 Rotelec Stirring-roller for a continuous slab-casting machine
US20150290703A1 (en) 2012-03-27 2015-10-15 Rotelec Stirring-roll for a continuous cast machine of metallic products of large cross section

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