CN215879783U - Electromagnetic stirring device of slab crystallizer - Google Patents
Electromagnetic stirring device of slab crystallizer Download PDFInfo
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- CN215879783U CN215879783U CN202122148878.8U CN202122148878U CN215879783U CN 215879783 U CN215879783 U CN 215879783U CN 202122148878 U CN202122148878 U CN 202122148878U CN 215879783 U CN215879783 U CN 215879783U
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- stirring device
- electromagnetic stirring
- slab crystallizer
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- 238000003756 stirring Methods 0.000 title claims abstract description 95
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000000498 cooling water Substances 0.000 claims abstract description 16
- 238000003475 lamination Methods 0.000 claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 239000010949 copper Substances 0.000 claims abstract description 11
- 239000002826 coolant Substances 0.000 claims description 9
- 239000003292 glue Substances 0.000 claims description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 4
- 238000004382 potting Methods 0.000 claims 1
- 238000009749 continuous casting Methods 0.000 abstract description 20
- 239000000110 cooling liquid Substances 0.000 abstract description 9
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 238000003825 pressing Methods 0.000 abstract description 7
- 230000000149 penetrating effect Effects 0.000 abstract description 6
- 238000004804 winding Methods 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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Abstract
The utility model discloses an electromagnetic stirring device of a slab crystallizer, which comprises a multi-section linear magnetic field generator, wherein the linear magnetic field generator comprises an iron core, the iron core comprises iron core laminations, an iron core pressing plate is arranged outside the iron core laminations, a plurality of coils are wound outside the iron core and formed by winding hollow copper pipes, a shielding body is arranged outside the non-working surface of each coil, the multi-section linear magnetic field generators are connected together through a shell frame, an electric connection box and a cooling liquid connection pipe are arranged in the shell frame in a penetrating manner, a cooling water channel I is arranged in the iron core pressing plate in a penetrating manner, and a cooling water channel II is arranged in the shielding body in a penetrating manner. The utility model is suitable for the preparation of continuous casting metal plate blanks with the width of 1650mm to 3500mm, can provide a foundation for the fine control of the stirring mode of the continuous casting metal plate blanks, and can form large-scale rotary stirring and also form local stirring with a plurality of strengths and a plurality of areas.
Description
Technical Field
The utility model relates to the technical field of continuous casting, in particular to an electromagnetic stirring device of a slab crystallizer.
Background
In order to obtain a continuous casting slab with better surface quality and internal quality, the content of inclusions needs to be reduced in the steel-making refining process, all process parameters need to be controlled in the continuous casting process, meanwhile, the process equipment of electromagnetic stirring is introduced, intervention is carried out at different times of metal solidification so as to change the flow form of liquid metal, reduce the chances that the inclusions and bubbles are captured at the solidification front, improve the uniformity of a solidified shell, increase the isometric crystal rate and improve center segregation.
In the prior art, as shown in fig. 1, a platen blank crystallizer electromagnetic stirring device is respectively arranged on the inner arc side and the outer arc side of a blank crystallizer, each blank crystallizer electromagnetic stirring device generates a traveling magnetic field when alternating current with a certain frequency is input, the traveling magnetic fields generated by the inner arc side electromagnetic stirring devices and the outer arc side electromagnetic stirring devices are opposite in direction, and the magnetic fields act on molten steel through electromagnetic force to drive the molten steel to form a rotary motion, so that inclusions and bubbles can float upwards, and the uniformity of solidified blank shells is facilitated.
One problem with the electromagnetic stirring device of the slab crystallizer shown in fig. 1 is the magnetic flux leakage problem of the non-working surface. The magnetic leakage causes the reduction of the utilization rate of the output power of the electromagnetic stirring system, and simultaneously causes interference to peripheral detection devices or detection elements, so that the Bao steel develops a slab continuous casting crystallizer electromagnetic stirring device with a magnetic shielding structure, and an open magnetic shielding cover is additionally arranged outside an iron core coil, as shown in fig. 2.
With the development of continuous casting equipment industry and the change of requirements of downstream large-scale equipment on continuous casting billets, the width and the thickness of a continuous casting slab are continuously increased, and the width of the continuous casting slab is gradually expanded from about 1000mm-1600mm to about 3000 mm; the thickness of the continuous casting slab is gradually thickened from about 230mm to about 500 mm; in the face of wider and thicker slab, the single-rotation stirring mode of the electromagnetic stirring device of the existing slab crystallizer cannot meet the requirement of high-quality continuous casting slab, and a new technical scheme must be adopted to solve the problem.
SUMMERY OF THE UTILITY MODEL
In view of the above technical problems in the related art, the present invention provides an electromagnetic stirring apparatus for slab crystallizer, which can overcome the above disadvantages in the prior art.
In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:
an electromagnetic stirring device of a slab crystallizer comprises a plurality of sections of linear magnetic field generators, each linear magnetic field generator comprises an iron core, each iron core comprises iron core laminations, iron core pressing plates are arranged on the outer sides of the iron core laminations, a plurality of coils are wound outside the iron cores, the number of the coils is a multiple of 2 or 3, the coils are formed by winding hollow copper pipes, insulating layers I are wrapped on the outer sides of the copper pipes, insulating layers II are arranged between the iron cores and the coils, shielding bodies are arranged on the outer sides of non-working faces of the coils, the sections of the linear magnetic field generators are connected together through a shell frame, electric connection boxes and cooling liquid connection pipes are arranged on the shell frame in a penetrating mode, cooling water paths I are arranged on the iron core pressing plates in a penetrating mode, cooling water paths II are arranged on the shielding bodies in a penetrating mode, one end of each cooling liquid connection pipe is connected with the cooling water paths I and the cooling water paths II respectively, the other end of the cooling liquid connecting pipe is connected with the cooling liquid circulating system, the electromagnetic stirring devices of the slab crystallizer are arranged at the wide edge of the slab crystallizer, two electromagnetic stirring devices of the slab crystallizer are symmetrically arranged on the inner arc side and the outer arc side of the slab crystallizer, and the coil working face of each electromagnetic stirring device of the slab crystallizer faces towards the slab crystallizer.
Preferably, the number of the electric connection box is one or more.
Preferably, each slab crystallizer electromagnetic stirring device comprises 2 sections of the linear magnetic field generators.
Preferably, each slab crystallizer electromagnetic stirring device comprises 3 sections of the linear magnetic field generators.
Preferably, the iron core, the coil and the shielding body are filled with heat-conducting fixing glue.
Preferably, the heat-conducting fixing glue is an organic silicon pouring glue.
Preferably, the core lamination is formed by laminating silicon steel sheets or electrician pure iron.
Preferably, the shield is a high conductivity shield.
Preferably, the shield is a copper plate.
Preferably, the shield is an aluminum plate or an aluminum alloy plate.
The utility model has the beneficial effects that:
the electromagnetic stirring device of the slab crystallizer is important process equipment for improving the surface and internal quality of a continuous cast slab, and the stirring mode has direct influence on the metallurgical effect of the continuous cast slab. For a wider continuous casting slab, the width of the continuous casting metal slab is about 1650mm-3500mm, when a conventional electromagnetic stirring device of a slab crystallizer is adopted, the stirring mode is that the running directions of magnetic fields of electromagnetic stirring at the inner arc side and the outer arc side are opposite, so that molten steel at the inner arc side and the outer arc side in the crystallizer are subjected to electromagnetic forces in opposite directions to push the molten steel to do rotary motion, for the wider continuous casting slab, the requirement of continuous casting of the slab on the surface quality and the inner quality can not be met by single rotary stirring, and the problem is difficult to solve by the prior art.
The technical scheme of the utility model can solve the technical problems. With the increase of the width of the plate blank, the utility model can arrange 2, 3 or N sections of linear magnetic field generators on the inner arc side and the outer arc side of the plate blank crystallizer respectively, and the non-working surface direction of each section of linear magnetic field generator is provided with a high-conductivity shielding body, so that the arrangement of the shielding body reduces the magnetic leakage of the non-working surface and improves the energy utilization rate of the system; and the setting of multistage linear magnetic field generator provides the basis for the control that becomes more meticulous of stirring mode, sets as a set ofly with two linear magnetic field generators that the inner arc side is relative with the outer arc side, and the magnetic field direction of each group, stirring intensity all can independently control to can form the local stirring in a plurality of regions, compare according to the experiment of stirring mode, stirring parameter and metallurgical technology effect, find out best stirring mode and stirring parameter, with furthest's performance slab crystallizer electromagnetic stirring device's effect, obtain satisfied continuous casting billet metallurgical effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of the structure and the use state of an electromagnetic stirring device of a prior slab crystallizer;
FIG. 2 is a schematic diagram of the structure and the use state of a conventional electromagnetic stirring device with a magnetic shielding structure for a slab crystallizer;
fig. 3 is a schematic structural diagram of a slab crystallizer electromagnetic stirring device according to a first embodiment of the utility model;
FIG. 4 is a schematic structural diagram of a linear magnetic field generator according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a linear magnetic field generator according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of the rotating stirring of the electromagnetic stirring device of the slab crystallizer according to the first embodiment of the utility model;
FIG. 7 is a schematic diagram of zone stirring of an electromagnetic stirring device of a slab crystallizer according to a first embodiment of the utility model;
fig. 8 is a schematic structural diagram of a slab crystallizer electromagnetic stirring device according to a second embodiment of the utility model;
FIG. 9 is a schematic diagram of the rotating stirring of the electromagnetic stirring device of the slab crystallizer according to the second embodiment of the utility model;
FIG. 10 is a schematic diagram of zone stirring of an electromagnetic stirring device of a slab crystallizer according to a second embodiment of the utility model;
in the figure: 1. a linear magnetic field generator; 11. an iron core; 111. iron core lamination; 112. an iron core pressing plate; 113. a second insulating layer; 12. a coil; 121. a copper pipe; 122. a first insulating layer; 13. a shield; 14. heat-conducting fixing glue; 2. a housing frame; 3. an electric connection box; 4. a coolant connection pipe; 41. a first cooling water path; 42. a second cooling water channel; 5. a slab crystallizer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The utility model is mainly suitable for the continuous casting metal plate blank with wider width from 1650mm to 3500 mm.
As shown in fig. 3-10, the electromagnetic stirring apparatus for a slab crystallizer according to the embodiment of the present invention includes a multi-segment linear magnetic field generator 1, the linear magnetic field generator 1 includes an iron core 11, the iron core 11 includes iron core laminations 111, an iron core pressing plate 112 is disposed on an outer side of the iron core laminations 111, a plurality of coils 12 are wound on an outer side of the iron core 11, the number of the coils 12 is a multiple of 2 or 3, the coils 12 are wound by a hollow copper tube 121, an insulating layer one 122 is wrapped on an outer side of the copper tube 121, an insulating layer two 113 is disposed between the iron core 11 and the coils 12, a shielding body 13 is disposed on a non-working surface side of the coils 12, the multi-segment linear magnetic field generator 1 is connected together by a housing frame 2, the housing frame 2 is provided with an electrical connection box 3 and a cooling liquid connection tube 4, the iron core pressing plate 112 is provided with a cooling water path one 41, the shielding body 13 is provided with a cooling water path two 42, one end of the cooling liquid connection tube 4 is respectively connected with the cooling water path one 41 and the cooling water path two 42, the other end of the cooling liquid connecting pipe 4 is connected with a cooling liquid circulating system, the electromagnetic stirring device of the slab crystallizer is arranged at the wide edge of the slab crystallizer 5, the inner arc side and the outer arc side of the slab crystallizer 5 are symmetrically provided with two platen electromagnetic stirring devices of the slab crystallizer (in this way, N sections of linear magnetic field generators are respectively arranged along the width direction of the slab), and the working surface of a coil 12 of each electromagnetic stirring device of the slab crystallizer faces the slab crystallizer 5; the number of the electric connection box 3 is one or more, and the electric connection box 3 is used for connecting an external power supply.
As shown in fig. 3 and 6-7, each slab crystallizer electromagnetic stirring device comprises 2 segments of linear magnetic field generators 1.
As shown in fig. 8-10, each slab crystallizer electromagnetic stirring device comprises 3 segments of linear magnetic field generators 1.
As shown in fig. 5, the iron core 11, the coil 12, and the shield 13 are filled with a heat-conducting fixing adhesive 14; the heat-conducting fixing glue 14 is an organic silicon pouring glue.
As shown in fig. 6 to 7 and 9 to 10, after a certain type of alternating current is respectively input, rotational stirring or multi-zone stirring can be formed in the slab mold 5.
In an embodiment of the present invention, the core lamination 111 is formed by laminating silicon steel sheets or electrical pure iron.
In one embodiment of the present invention, the shield 13 is a high conductivity shield.
In one embodiment of the present invention, the shield 13 is a copper plate.
In one embodiment of the present invention, the shielding body 13 is an aluminum plate or an aluminum alloy plate.
In order to facilitate understanding of the above-described technical aspects of the present invention, the above-described technical aspects of the present invention will be described in detail below in terms of specific usage.
The structure of the electromagnetic stirring device of the existing slab crystallizer is shown in fig. 1, each electromagnetic stirring device of the slab crystallizer only has one section of linear magnetic field generator, each linear magnetic field generator comprises an iron core 11 and a plurality of coils 12 wound on the iron core; when the electromagnetic stirring device is used, the inner arc side and the outer arc side of the slab crystallizer 5 are respectively provided with a platen slab crystallizer electromagnetic stirring device, after a certain form of alternating current is input to the coil 12, the running directions of magnetic fields of electromagnetic stirring at the inner arc side and the outer arc side of the slab crystallizer 5 are opposite, so that molten steel at the inner arc side and the outer arc side in the crystallizer is subjected to electromagnetic forces in opposite directions, the molten steel is pushed to rotate, the floating of molten steel inclusion and bubbles is facilitated, and the uniformity of solidified shell blanks is facilitated.
Fig. 2 is a slab crystallizer electromagnetic stirring device with a magnetic shielding structure, which is mainly characterized in that on the basis of the structure shown in fig. 1, an open magnetic shielding cover is additionally arranged outside an iron core coil so as to solve the problem of magnetic flux leakage of a non-working surface of the slab crystallizer electromagnetic stirring device shown in fig. 1.
As shown in fig. 3, according to a first embodiment of the present invention, there is provided a slab crystallizer electromagnetic stirring apparatus including 2 segments of linear magnetic field generators 1, which includes four parts, namely, 2 segments of linear magnetic field generators 1, a housing frame 2, an electrical connection box 3, and a coolant connection pipe 4, where the coolant connection pipe 4 is used for receiving a circulating coolant.
As shown in fig. 6, in the first embodiment of the present invention, the electromagnetic stirring device of the slab mold including 2 segments of the linear magnetic field generators 1 is disposed on the wide side of the slab mold 5, one on each of the inner arc side and the outer arc side, and is installed oppositely, so that the 2 segments of the linear magnetic field generators 1 are disposed along the width direction of the slab. And (2) respectively inputting alternating currents of a certain form to each linear magnetic field generator 1 to ensure that the magnetic field directions of the two linear magnetic field generators 1 on the inner arc side of the plate blank crystallizer 5 are consistent, and the magnetic field directions of the two linear magnetic field generators 1 on the outer arc side face the other side at the same time, so that the rotary stirring which is the same as that of the conventional plate blank crystallizer is formed in the plate blank crystallizer 5.
As shown in fig. 7, in the first embodiment of the present invention, a slab crystallizer electromagnetic stirring device including 2 segments of linear magnetic field generators 1 is disposed on a wide side of a slab crystallizer 5, and each of an inner arc side and an outer arc side is installed oppositely, two linear magnetic field generators 1 opposite to each other on the inner arc side and the outer arc side of the slab crystallizer 5 are set as one group, and the magnetic field directions and the stirring strengths of the 2 groups are independently controlled, so that after a certain form of alternating current is input, local stirring in a plurality of regions can be formed in the slab crystallizer 5.
As shown in fig. 8, according to the second embodiment of the present invention, there is provided a slab crystallizer electromagnetic stirring apparatus including 3 segments of linear magnetic field generators 1, which includes four parts, namely, 3 segments of linear magnetic field generators 1, a housing frame 2, an electrical connection box 3, and a coolant connection pipe 4. The 3-segment linear magnetic field generator 1 is connected together by a housing frame 2.
As shown in fig. 9, in the second embodiment of the present invention, the electromagnetic stirring device of the slab mold including 3 segments of the linear magnetic field generators 1 is disposed on the wide side of the slab mold 5, and one of the inner arc side and the outer arc side is disposed opposite to each other, so that 3 segments of the linear magnetic field generators 1 are disposed along the width direction of the slab. And (2) respectively inputting alternating currents of a certain form to each linear magnetic field generator 1 to ensure that the magnetic field directions of the three linear magnetic field generators 1 on the inner arc side of the plate blank crystallizer 5 are consistent, and the magnetic field directions of the three linear magnetic field generators 1 on the outer arc side face the other side at the same time, so that the rotary stirring which is the same as that of the conventional plate blank crystallizer is formed in the plate blank crystallizer 5.
As shown in fig. 10, in the second embodiment of the present invention, the slab crystallizer electromagnetic stirring device including 3 segments of linear magnetic field generators 1 is disposed on the wide side of the slab crystallizer 5, one on each of the inner arc side and the outer arc side, and is installed oppositely, the two linear magnetic field generators 1 on the inner arc side and the outer arc side of the slab crystallizer 5 are set as one group, 3 groups are provided, the magnetic field directions and the stirring strengths of the 3 groups are independently controllable, and after a certain form of alternating current is input, local stirring in a plurality of regions can be formed in the slab crystallizer 5.
In conclusion, the utility model is suitable for preparing the continuous casting metal plate blank with the width of 1650mm to 3500mm, can provide a foundation for the fine control of the stirring mode of the continuous casting metal plate blank, and can form the rotary stirring in a large range and also form the local stirring with a plurality of intensities and a plurality of areas.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a slab crystallizer electromagnetic stirring device, its characterized in that includes linear magnetic field generator of multistage (1), linear magnetic field generator (1) is including iron core (11), iron core (11) are including iron core lamination (111), iron core lamination (111) outside is equipped with iron core clamp plate (112), iron core (11) outside has a plurality of coils (12) around the system, the number of coil (12) is 2 or 3's multiple, coil (12) are formed by hollow copper pipe (121) coiling, copper pipe (121) outside parcel has insulating layer one (122), iron core (11) with be equipped with insulating layer two (113) between coil (12), coil (12) non-working face outside is equipped with shielding body (13), the multistage linear magnetic field generator (1) links together through casing frame (2), casing frame (2) are worn to be equipped with electric connection box (3) and coolant liquid connecting pipe (4), iron core clamp plate (112) are worn to be equipped with cooling water route (41), cooling water route two (42) are worn to be equipped with in shield (13), coolant liquid connecting pipe (4) one end respectively with cooling water route (41) reach cooling water route two (42) are connected, the coolant liquid connecting pipe (4) other end is connected with coolant liquid circulation system, slab crystallizer electromagnetic stirring device sets up the broadside department at slab crystallizer (5), the inner arc side and the outer arc side symmetry of slab crystallizer (5) are provided with two slab crystallizer electromagnetic stirring device, every slab crystallizer electromagnetic stirring device's coil (12) working face all moves towards slab crystallizer (5).
2. Electromagnetic stirring device of slab crystallizer according to claim 1 characterized in that the number of electrical connection boxes (3) is one or more.
3. The slab crystallizer electromagnetic stirring device according to claim 1, characterized in that each slab crystallizer electromagnetic stirring device comprises 2 segments of said linear magnetic field generator (1).
4. The slab crystallizer electromagnetic stirring device according to claim 1, characterized in that each slab crystallizer electromagnetic stirring device comprises 3 segments of said linear magnetic field generator (1).
5. Electromagnetic stirring device of slab crystallizer according to claim 1 characterized in that said iron core (11), said coil (12), said shield (13) are filled with heat conducting fixing glue (14) between each other.
6. The electromagnetic stirring device of a slab crystallizer as claimed in claim 5, characterized in that the heat-conducting fixing glue (14) is an organosilicon potting glue.
7. Electromagnetic stirring device of slab crystallizer according to claim 1 characterized in that said iron core laminations (111) are laminated from silicon steel sheets or electrical pure iron.
8. Electromagnetic stirring device of slab crystallizer according to claim 1 characterized in that said shield (13) is a high conductivity shield.
9. Electromagnetic stirring device of slab crystallizer according to claim 8 characterized in that said shield (13) is a copper plate.
10. Electromagnetic stirring device of slab crystallizer according to claim 8 characterized in that said shield (13) is an aluminum or aluminum alloy plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122148878.8U CN215879783U (en) | 2021-09-07 | 2021-09-07 | Electromagnetic stirring device of slab crystallizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122148878.8U CN215879783U (en) | 2021-09-07 | 2021-09-07 | Electromagnetic stirring device of slab crystallizer |
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| Publication Number | Publication Date |
|---|---|
| CN215879783U true CN215879783U (en) | 2022-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122148878.8U Active CN215879783U (en) | 2021-09-07 | 2021-09-07 | Electromagnetic stirring device of slab crystallizer |
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| CN (1) | CN215879783U (en) |
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2021
- 2021-09-07 CN CN202122148878.8U patent/CN215879783U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Electromagnetic stirring device for slab crystallizer Effective date of registration: 20220818 Granted publication date: 20220222 Pledgee: Bank of Beijing Limited by Share Ltd. Changsha branch Pledgor: HUNAN KEMEIDA ELECTRIC Co.,Ltd. Registration number: Y2022430000073 |
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Date of cancellation: 20231101 Granted publication date: 20220222 Pledgee: Bank of Beijing Limited by Share Ltd. Changsha branch Pledgor: HUNAN KEMEIDA ELECTRIC Co.,Ltd. Registration number: Y2022430000073 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An electromagnetic stirring device for slab crystallizer Effective date of registration: 20231107 Granted publication date: 20220222 Pledgee: Bank of Beijing Limited by Share Ltd. Changsha branch Pledgor: HUNAN KEMEIDA ELECTRIC Co.,Ltd. Registration number: Y2023980064165 |
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