CA1144336A - Stirring process and device for improving the quality of a continuously cast metal - Google Patents
Stirring process and device for improving the quality of a continuously cast metalInfo
- Publication number
- CA1144336A CA1144336A CA000355921A CA355921A CA1144336A CA 1144336 A CA1144336 A CA 1144336A CA 000355921 A CA000355921 A CA 000355921A CA 355921 A CA355921 A CA 355921A CA 1144336 A CA1144336 A CA 1144336A
- Authority
- CA
- Canada
- Prior art keywords
- stirring
- magnetic field
- magnetic
- inductor
- rotating
- 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.)
- Expired
Links
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
- B22D11/12—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
- B22D11/10—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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
- General Induction Heating (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Stirring process and device for improving the quality of a continuously cast metal ABSTRACT OF THE DISCLOSURE
This device for stirring a metal during solidification in a continuous casting installation comprises an inductor producing a fixed magnetic field with respect to itself, means for creating rotary movement of this inductor about the metal during casting and heat screens permeable to the field disposed at least between the field generator and the cast metal. The rotation of the inductor causes eddy currents in the casting and produces forces energetically rotating the liquid metal.
This device for stirring a metal during solidification in a continuous casting installation comprises an inductor producing a fixed magnetic field with respect to itself, means for creating rotary movement of this inductor about the metal during casting and heat screens permeable to the field disposed at least between the field generator and the cast metal. The rotation of the inductor causes eddy currents in the casting and produces forces energetically rotating the liquid metal.
Description
~4336 The invention relates to a stirring process and device for improving the quality of a continuously cast metal.
With the standards of quality for metals, steel in partieular, becomi~g more and more severe, it is neeessary, in order to avoid .r~5 downgrading of quality or rejects, to obtain a greater and greater consistency of quality in production. This is in partieular the purpose, in production with eontinuous easting, of the devices for :~stirring the metal during casting, i.e. in the ingot mould and during solidifieation at levels situated below the ingot mould 10 where a still liquid zone frequently called "liquid well" is to be found in the middle of the cooling ingot. Such stirring, on the one hand, reduees the length of the crystals during solidification and, on the other hand, distributes the impurities whieh have not risen to the surfaee on top of the ingot mou~d.
~A 15 Eleetromagnetie devices are known for stirring billets or blooms operating by the action of a rotary magnetic field passing through the billet during solidification, the magnetic field being .~ created by inductor eoils disposed in -the ingot mould or therebelow.
Sueh a deviee is deseri~bed for example in tne Freneh patent applieation of the applicant Published under the number 2355392 or in US patent 3153820.
.
Stirring deviees are also known for the eontinnous easting of ~labs.
One of these deviees deseribed in the Freneh patent n
With the standards of quality for metals, steel in partieular, becomi~g more and more severe, it is neeessary, in order to avoid .r~5 downgrading of quality or rejects, to obtain a greater and greater consistency of quality in production. This is in partieular the purpose, in production with eontinuous easting, of the devices for :~stirring the metal during casting, i.e. in the ingot mould and during solidifieation at levels situated below the ingot mould 10 where a still liquid zone frequently called "liquid well" is to be found in the middle of the cooling ingot. Such stirring, on the one hand, reduees the length of the crystals during solidification and, on the other hand, distributes the impurities whieh have not risen to the surfaee on top of the ingot mou~d.
~A 15 Eleetromagnetie devices are known for stirring billets or blooms operating by the action of a rotary magnetic field passing through the billet during solidification, the magnetic field being .~ created by inductor eoils disposed in -the ingot mould or therebelow.
Sueh a deviee is deseri~bed for example in tne Freneh patent applieation of the applicant Published under the number 2355392 or in US patent 3153820.
.
Stirring deviees are also known for the eontinnous easting of ~labs.
One of these deviees deseribed in the Freneh patent n
2 231 454 of the applieant comprises an inductor disposed inside a -~ guide roll for the slab below the ingot mould, and creating there-about a creeping field so as to create lateral movement of the still ~ liquid part situated behind the eooled skin.
-- A device is also known for stirring slabs in a continuous _q -'30 easting ingot mould described in the French patent of the applieant published under the n 2 393 632 and which comprises an inductanee situated in the ingot mould and ereating a creeping fild either in the lateral direetion to ereate horizontal movement of the liquid ~metal during easting, or in the vertieal direetion to create a rising or descending movement of the liquid metal.
,~
i ~,, ~
~1~4336 The processes described above all have the disadvantage, because they are fed with AC current and because the magnetic field created must pass through a considerable air space, of requiring a considerable magnetizing power for a reduced active power required.
The result is considerable losses in the copper, low yield and considerable equipment for the energy supply.
The invention aims at providing a process and device for improving the quality o-f continuously cast metal which have, for the same efYects as described above, a distinctly improved yield and an increased stirring movement.
The process is characterized in that an inductor is rotated producing a fixed magnetic field with respect to the inductor about an axis parallelto at least one of the surfaces of the cast product.
Depending on the case, the relative movement will be a rotational movement about an axis perpendicular to the casting axis or an axis parallel thereto.
Devices corresponding to this process will comprise then means for producing a constant magnetic field consisting of permanent magnets or electromagnets, the magnetizing power being then supplied in the second case by a DC current as in a synchronous machine rotor.
Furthermore, means for rotating these devices are provided so as to create the relative move~ent of the magnets and thus cause eddy currents in the liquid metal and the production of forces for circulating the liquid metal.
The accompanying figures, relating to two variations of the device for implementing the process, will help in understanding the invention, in which :
_, Fig. 1 shows in a diametrical section a stirring device for `~ the continuous casting of billets ox blooms.
',t;~ Figs. 2, 3 and 4 show a stirring device for the continuous casting of slabs.
Fig. 2 shows a slab during continuous casting.
Fig. 3 shows schematically the stirring principle.
~.1 .
. Fig. 4 gives the detail of a stirring roll.
:
"~
1~433~
In ~ig~ 1 there is shown at 1 a billet cooling under the ~.
ingot mould, the still li~uid metaL being shown at 2. A stirring ~device 3 is placed around the billet It comprises an inductor 4 having a cylindrical yoke 5 in which are fixed two inductor poles - 5 6 made from a magnetically hard matçrial so as to create a uniform -~; field passing through the cylindrical space occupied partially bythe billet. So as to facilitate the construction, these poles may be made by stacking relatively thin elements 7 disposed along ;~ generatrices and bonded together.
A material particularly well adapted to forming such a stack is magnetic rubber which can be disposed in a uniform layer either pre-magnetized or magnetizable after placing, ~or example by disposing inside the cylindrical space available~an alternator rotor in which will be fed a suitable excitation current.
, .. .
~` 15 Ioke 5 is disposed in two mounting elements 8 and 9 and the whole of inductor 4 is placed in a steel casing 10 which has a lower disc-shaped part 11 and a lateral cylindrical part 12 so that inductor 4 may rotate inside casing 10.
.~
~ For this purpose, rollers 13a and 13b are provided rotating ., about pins connected to mounting elements 8 and 9 and travelling in races 14 and 15 integral with casing 10.
Mounting 8 has a toothed wheel 16 by means of which the inductor ~ driven byelectric motor 17 and gear 18.
A cover 19 made from ordinary steel serves as a mngnetic shield for the leakage flux in the same way as wall 11.
The assembly comprising inductor 4 and casing 10 is capped with a water jacket 20, made from stainless steel for example, comprising a vertical double-walled tube 20a and a double-walled ~r disc 20b, so as to protect the inductor from the radiation of the billet and the projections of metal coming from the ingot mou~d.
This jacket will have a stream of water passing therethrough.
The operation is the following : rotation of inductor 4 under the action of motor 7, causes rotation of the magnetic field ~- created which passes through the billet~ so that the eddy currents . ~ .
:
-- A device is also known for stirring slabs in a continuous _q -'30 easting ingot mould described in the French patent of the applieant published under the n 2 393 632 and which comprises an inductanee situated in the ingot mould and ereating a creeping fild either in the lateral direetion to ereate horizontal movement of the liquid ~metal during easting, or in the vertieal direetion to create a rising or descending movement of the liquid metal.
,~
i ~,, ~
~1~4336 The processes described above all have the disadvantage, because they are fed with AC current and because the magnetic field created must pass through a considerable air space, of requiring a considerable magnetizing power for a reduced active power required.
The result is considerable losses in the copper, low yield and considerable equipment for the energy supply.
The invention aims at providing a process and device for improving the quality o-f continuously cast metal which have, for the same efYects as described above, a distinctly improved yield and an increased stirring movement.
The process is characterized in that an inductor is rotated producing a fixed magnetic field with respect to the inductor about an axis parallelto at least one of the surfaces of the cast product.
Depending on the case, the relative movement will be a rotational movement about an axis perpendicular to the casting axis or an axis parallel thereto.
Devices corresponding to this process will comprise then means for producing a constant magnetic field consisting of permanent magnets or electromagnets, the magnetizing power being then supplied in the second case by a DC current as in a synchronous machine rotor.
Furthermore, means for rotating these devices are provided so as to create the relative move~ent of the magnets and thus cause eddy currents in the liquid metal and the production of forces for circulating the liquid metal.
The accompanying figures, relating to two variations of the device for implementing the process, will help in understanding the invention, in which :
_, Fig. 1 shows in a diametrical section a stirring device for `~ the continuous casting of billets ox blooms.
',t;~ Figs. 2, 3 and 4 show a stirring device for the continuous casting of slabs.
Fig. 2 shows a slab during continuous casting.
Fig. 3 shows schematically the stirring principle.
~.1 .
. Fig. 4 gives the detail of a stirring roll.
:
"~
1~433~
In ~ig~ 1 there is shown at 1 a billet cooling under the ~.
ingot mould, the still li~uid metaL being shown at 2. A stirring ~device 3 is placed around the billet It comprises an inductor 4 having a cylindrical yoke 5 in which are fixed two inductor poles - 5 6 made from a magnetically hard matçrial so as to create a uniform -~; field passing through the cylindrical space occupied partially bythe billet. So as to facilitate the construction, these poles may be made by stacking relatively thin elements 7 disposed along ;~ generatrices and bonded together.
A material particularly well adapted to forming such a stack is magnetic rubber which can be disposed in a uniform layer either pre-magnetized or magnetizable after placing, ~or example by disposing inside the cylindrical space available~an alternator rotor in which will be fed a suitable excitation current.
, .. .
~` 15 Ioke 5 is disposed in two mounting elements 8 and 9 and the whole of inductor 4 is placed in a steel casing 10 which has a lower disc-shaped part 11 and a lateral cylindrical part 12 so that inductor 4 may rotate inside casing 10.
.~
~ For this purpose, rollers 13a and 13b are provided rotating ., about pins connected to mounting elements 8 and 9 and travelling in races 14 and 15 integral with casing 10.
Mounting 8 has a toothed wheel 16 by means of which the inductor ~ driven byelectric motor 17 and gear 18.
A cover 19 made from ordinary steel serves as a mngnetic shield for the leakage flux in the same way as wall 11.
The assembly comprising inductor 4 and casing 10 is capped with a water jacket 20, made from stainless steel for example, comprising a vertical double-walled tube 20a and a double-walled ~r disc 20b, so as to protect the inductor from the radiation of the billet and the projections of metal coming from the ingot mou~d.
This jacket will have a stream of water passing therethrough.
The operation is the following : rotation of inductor 4 under the action of motor 7, causes rotation of the magnetic field ~- created which passes through the billet~ so that the eddy currents . ~ .
:
-3-443;~6 O generated therein cause by action on this field an energetic rotational movement of the still liquid part 2.
Instead of poles made ~rom hard magnetic material~ they :,.
could of course be made from magnetically soft steel surrounded by an inductor winding through which passes a DC current. Sliding electric contacts may be provided in this case between the windings -~ which are placed in a system which rotates and the fixed part where ~ the electric current is fed.
,. ,u .
A device with permanent magnets such as described above lends itself remarkably well to installation at the level of an ingot mould. In this case, the rotating assembly will be placed preferably in an annular enclosure which surrounds the ingot mould and if necessary is filled with water. Only the drive shaft of the motor gear will pass sealingly therethrough.
` 15 With respect to the solutions with a fixed electromagnetic`~J inductor supplied with AC current, the system proposed has, on the~ one hand, the advantage of greater simplicity and, on the other hand, ~~ allows fields of greater strength to be produced and not requiring . .
any reactive power other than that required by the motor which will only supply the power required for stirring, mechanical losses and ~i losses by eddy currents in the solidified part of the billet and in the fixed parts (screens and water jacket).
As a variation, the diametrically opposed inductor poles 4 may be given a helical form so that the electric currents generated in the billet by rotation of the inductors are inclined with respect to the casting axis and generate forces which have a component parallel to the casting axis, either in the rising direction or :~ in the descending direction, so as to create helicai stirring, which, as explained in French patent application n~ 78 15304 of the applicant provides an improvement in the quality of the metal greater than that given by simple rotary stirring.
In Fig. 2 which shows schematically a slab 21 during continuous casting in the part situated below the ingot mould, as well as the pairs of rolls 22 for guiding this slab, there are shown certain pairs of rolls such as 221, 222, 223, 224 which have the particularity of being provided at each end with cylindrical permanent magnet .~
-~1 1144336 inductors 23 and 24 on each side of the slab and magnetized transversely in an homogeneous way so that the lines of force of the magnetic ~ield are perpenaicular to a diametrical plane.
~7 -l The magnetic axes of the permanent cylindrical magnets 23 j- 5 and 24 are orientated with respect to each other as shown in ~ig. 3 and rotate at the same speed, different from that of the guide rolls and their arrangement inside the guide roll will be described further -`1 on.
. .
~ With reference to Fig. 3 which gives schematically the ~.Y
`!., 10 orientation of the magnetic axes of magnets 24 situated on one side .~
of the slab and designated by 241A, 241b, 242a, 242b, 243a, 243b, 244~ and 244b, the straight arrows passing through the centre of the rolls indicate at a given moment the direction of magnetization and the curved arrows situated in the circles representing the magnets give the direction of rotation imparted to these magnets. It can be seen that all the magnets 241a, 242a, 243a, 244a rotate in one direction ~ and that the magnets 241b etc.... which are opposite thereto rotate in - the other direction.
It can be seen furthermore that from a magnet 241 to a magnet 242 the directions of the magnetic axes are staggered by a ,,,~ .
-~, quarter of a revolution in the direction of rotation of the corresponding magnets going from left to right.
By causing the magnets previously orientated as shown in ''e ` Fig. 3 to rotate in synchronism, there is created a creeping field and the liquid metal situated in the middle part of the slab is driven in the direction of arrow F (Figs. 2 and 3). If the same arrangement is made on the other side of the slab with inductors 23 but by causing them to rotate in the opposite direction, the liquid metal will flow in the direction of arrow F', so that there will be created stirring by closed circuit circulation along contours such as C.
Fig. 4 gives the detail of a stirring roll such as 22 in the vicinity of one of its ends which contains a cylindrical magnet 24.
Hollow guide roll 22 rotates in bearings 25 situated at both its ends. It is made in three parts, a central part 22a and two end ~ .
.~
~ -5-" plugs 22b. The central partl i sl~u3a~eÇ so as to receive at each of its ends the cylindrical magnets 24 situated inside a cylindrical ~ sleeve 26 made from a non-magnetic steel. The magnets are rotated "~
by a shaft 27 rotating in roller bearings 29 and 30 housed in parts 22a and 22b. A flow of cooling air is provided between shaft 29 and ~j plug 22b, and countersinking 32 and 33 allows the air to reach the annular cylindrical space 34 situated between sleeve 26 and guide roll 22 and to leave therefrom to go to the other end thereof through a central channel 28. Arrows 35 and 38 show the flow of 10 cooling air.
The magnet may be formed by a stack of ferrite rings in sleeve 26. It may also be formed from a ferrite powder mixed with thermo-setting resin then injected and hardened.
.
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.
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Instead of poles made ~rom hard magnetic material~ they :,.
could of course be made from magnetically soft steel surrounded by an inductor winding through which passes a DC current. Sliding electric contacts may be provided in this case between the windings -~ which are placed in a system which rotates and the fixed part where ~ the electric current is fed.
,. ,u .
A device with permanent magnets such as described above lends itself remarkably well to installation at the level of an ingot mould. In this case, the rotating assembly will be placed preferably in an annular enclosure which surrounds the ingot mould and if necessary is filled with water. Only the drive shaft of the motor gear will pass sealingly therethrough.
` 15 With respect to the solutions with a fixed electromagnetic`~J inductor supplied with AC current, the system proposed has, on the~ one hand, the advantage of greater simplicity and, on the other hand, ~~ allows fields of greater strength to be produced and not requiring . .
any reactive power other than that required by the motor which will only supply the power required for stirring, mechanical losses and ~i losses by eddy currents in the solidified part of the billet and in the fixed parts (screens and water jacket).
As a variation, the diametrically opposed inductor poles 4 may be given a helical form so that the electric currents generated in the billet by rotation of the inductors are inclined with respect to the casting axis and generate forces which have a component parallel to the casting axis, either in the rising direction or :~ in the descending direction, so as to create helicai stirring, which, as explained in French patent application n~ 78 15304 of the applicant provides an improvement in the quality of the metal greater than that given by simple rotary stirring.
In Fig. 2 which shows schematically a slab 21 during continuous casting in the part situated below the ingot mould, as well as the pairs of rolls 22 for guiding this slab, there are shown certain pairs of rolls such as 221, 222, 223, 224 which have the particularity of being provided at each end with cylindrical permanent magnet .~
-~1 1144336 inductors 23 and 24 on each side of the slab and magnetized transversely in an homogeneous way so that the lines of force of the magnetic ~ield are perpenaicular to a diametrical plane.
~7 -l The magnetic axes of the permanent cylindrical magnets 23 j- 5 and 24 are orientated with respect to each other as shown in ~ig. 3 and rotate at the same speed, different from that of the guide rolls and their arrangement inside the guide roll will be described further -`1 on.
. .
~ With reference to Fig. 3 which gives schematically the ~.Y
`!., 10 orientation of the magnetic axes of magnets 24 situated on one side .~
of the slab and designated by 241A, 241b, 242a, 242b, 243a, 243b, 244~ and 244b, the straight arrows passing through the centre of the rolls indicate at a given moment the direction of magnetization and the curved arrows situated in the circles representing the magnets give the direction of rotation imparted to these magnets. It can be seen that all the magnets 241a, 242a, 243a, 244a rotate in one direction ~ and that the magnets 241b etc.... which are opposite thereto rotate in - the other direction.
It can be seen furthermore that from a magnet 241 to a magnet 242 the directions of the magnetic axes are staggered by a ,,,~ .
-~, quarter of a revolution in the direction of rotation of the corresponding magnets going from left to right.
By causing the magnets previously orientated as shown in ''e ` Fig. 3 to rotate in synchronism, there is created a creeping field and the liquid metal situated in the middle part of the slab is driven in the direction of arrow F (Figs. 2 and 3). If the same arrangement is made on the other side of the slab with inductors 23 but by causing them to rotate in the opposite direction, the liquid metal will flow in the direction of arrow F', so that there will be created stirring by closed circuit circulation along contours such as C.
Fig. 4 gives the detail of a stirring roll such as 22 in the vicinity of one of its ends which contains a cylindrical magnet 24.
Hollow guide roll 22 rotates in bearings 25 situated at both its ends. It is made in three parts, a central part 22a and two end ~ .
.~
~ -5-" plugs 22b. The central partl i sl~u3a~eÇ so as to receive at each of its ends the cylindrical magnets 24 situated inside a cylindrical ~ sleeve 26 made from a non-magnetic steel. The magnets are rotated "~
by a shaft 27 rotating in roller bearings 29 and 30 housed in parts 22a and 22b. A flow of cooling air is provided between shaft 29 and ~j plug 22b, and countersinking 32 and 33 allows the air to reach the annular cylindrical space 34 situated between sleeve 26 and guide roll 22 and to leave therefrom to go to the other end thereof through a central channel 28. Arrows 35 and 38 show the flow of 10 cooling air.
The magnet may be formed by a stack of ferrite rings in sleeve 26. It may also be formed from a ferrite powder mixed with thermo-setting resin then injected and hardened.
.
`,~., ~q ~ .
'-.d ;,~
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.
d `_ -.~
Claims (10)
1. A process for stirring a continuously cast metal by the action of a rotating magnetic field on the metal during cooling, wherein an inductor is caused to rotate producing a fixed magnetic field with respect to itself about an axis parallel to at least one of the surfaces of the cast product.
2. A device for stirring a metal during solidification in a continuous casting installation for implementing the process as claimed in claim 1, wherein means are provided for creating a rotary movement of the inductor so as to create a magnetic field rotating about the casting.
3. The device as claimed in claim 2, wherein the means for producing the magnetic field are formed by permanent magnets.
4. The device as claimed in claim 2, wherein the means for producing the magnetic field are formed by electro-magnets.
5. The device as claimed in claim 2 for stirring billets or blooms, wherein two magnetic poles of opposite polarity are disposed diametrically opposite each other inside a cylindrical magnetic yoke rotating in an annular jacket at least partially non-magnetic and comprising water cooling.
6. The device as claimed in claim 5, wherein the poles are disposed parallel to a generatrix of said magnetic yoke.
7. The device as claimed in claim 5, wherein the poles are shaped in accordance with two diametrically opposite spiralled surfaces.
8. The device as claimed in claim 5, wherein each annular jacket is formed partially by the ingot mould.
9. The device as claimed in claim 1, for stirring slabs and comprising guide rolls, wherein there is provided at one at least of the ends and in the axis of said end of certain guide rolls a magnetic field generator of constant strength rotated independently with respect to the roll by appropriate means.
10. The device as claimed in claim 1, wherein a certain number of rolls have at one of their ends inductors whose magnetic axes are staggered evenly to create a creeping field in the direction of casting and at the other end inductors rotating in opposite directions so as to create a creeping field in the opposite direction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7918088A FR2465535A1 (en) | 1979-07-12 | 1979-07-12 | BREWING METHOD AND DEVICE FOR IMPROVING THE QUALITY OF CONTINUOUSLY CAST METAL |
| FR7918088 | 1979-07-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1144336A true CA1144336A (en) | 1983-04-12 |
Family
ID=9227795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000355921A Expired CA1144336A (en) | 1979-07-12 | 1980-07-10 | Stirring process and device for improving the quality of a continuously cast metal |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0022711B1 (en) |
| JP (1) | JPS5659568A (en) |
| AT (1) | ATE2655T1 (en) |
| CA (1) | CA1144336A (en) |
| DE (1) | DE3062197D1 (en) |
| ES (1) | ES8105171A1 (en) |
| FR (1) | FR2465535A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201800006635A1 (en) * | 2018-06-25 | 2019-12-25 | METHOD OF CONTAINING A SLAB DURING CASTING |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2511274A1 (en) * | 1981-08-11 | 1983-02-18 | Sumitomo Metal Ind | Rotatable permanent magnet structure for stirring molten metal - provides both shifting and rotating magnetic fields when moved around mould periphery |
| FR2519567A1 (en) * | 1982-01-13 | 1983-07-18 | Vallourec | METHOD FOR MANUFACTURING HOLLOW BODIES BY CONTINUOUS CASTING USING A MAGNETIC FIELD AND DEVICE FOR CARRYING OUT THE METHOD |
| FR2537470A2 (en) * | 1982-01-13 | 1984-06-15 | Vallourec | Magnetic rotor for continuous casting of hollow bodies |
| 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 |
| AU6568196A (en) * | 1995-10-12 | 1997-04-17 | Alusuisse Technology & Management Ltd. | Process for manufacturing a metal ingot with thixotropic properties |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1140200A (en) * | 1955-01-15 | 1957-07-16 | Boehler & Co Ag Geb | Process for moving molten metal in continuous casting plants |
| US3153820A (en) * | 1961-10-09 | 1964-10-27 | Charles B Criner | Apparatus for improving metal structure |
| FR2231454A2 (en) * | 1973-05-29 | 1974-12-27 | Cem Comp Electro Mec | Slab casting machine - with metal stirring by electrically wound withdrawal rolls |
| FR2418047A1 (en) * | 1978-02-28 | 1979-09-21 | Sumitomo Metal Ind | Continuous casting process - with solidification effected in the presence of electric current and magnetic field to agitate molten metal |
-
1979
- 1979-07-12 FR FR7918088A patent/FR2465535A1/en active Granted
-
1980
- 1980-07-08 DE DE8080401027T patent/DE3062197D1/en not_active Expired
- 1980-07-08 AT AT80401027T patent/ATE2655T1/en not_active IP Right Cessation
- 1980-07-08 EP EP80401027A patent/EP0022711B1/en not_active Expired
- 1980-07-10 CA CA000355921A patent/CA1144336A/en not_active Expired
- 1980-07-11 ES ES493321A patent/ES8105171A1/en not_active Expired
- 1980-07-11 JP JP9410180A patent/JPS5659568A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201800006635A1 (en) * | 2018-06-25 | 2019-12-25 | METHOD OF CONTAINING A SLAB DURING CASTING | |
| WO2020002313A1 (en) | 2018-06-25 | 2020-01-02 | Rotelec Sa | Method for containing a slab during continuous casting |
| RU2765642C1 (en) * | 2018-06-25 | 2022-02-01 | Ротелек Са | Method for retaining the slab in continuous casting |
| US11969782B2 (en) | 2018-06-25 | 2024-04-30 | Rotelec Sa | Method for containing a slab during continuous casting |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0022711B1 (en) | 1983-03-02 |
| ES493321A0 (en) | 1981-05-16 |
| FR2465535B1 (en) | 1983-04-15 |
| FR2465535A1 (en) | 1981-03-27 |
| EP0022711A1 (en) | 1981-01-21 |
| ES8105171A1 (en) | 1981-05-16 |
| JPS5659568A (en) | 1981-05-23 |
| ATE2655T1 (en) | 1983-03-15 |
| DE3062197D1 (en) | 1983-04-07 |
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