CN116493558A - High-density magnetic field roller type electromagnetic stirring device for slab continuous casting - Google Patents
High-density magnetic field roller type electromagnetic stirring device for slab continuous casting Download PDFInfo
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- CN116493558A CN116493558A CN202310646021.XA CN202310646021A CN116493558A CN 116493558 A CN116493558 A CN 116493558A CN 202310646021 A CN202310646021 A CN 202310646021A CN 116493558 A CN116493558 A CN 116493558A
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- stirring device
- electromagnetic stirring
- magnetic field
- roll
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- 238000003756 stirring Methods 0.000 title claims abstract description 49
- 238000009749 continuous casting Methods 0.000 title claims abstract description 35
- 238000005266 casting Methods 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims description 36
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 22
- 229910052802 copper Inorganic materials 0.000 claims description 22
- 239000010949 copper Substances 0.000 claims description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 15
- 230000007423 decrease Effects 0.000 claims description 3
- 241000227287 Elliottia pyroliflora Species 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000007920 subcutaneous administration Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention provides a high-density magnetic field roller type electromagnetic stirring device for slab continuous casting. The electromagnetic stirring device comprises a connecting part, a first sectional roller and a second sectional roller; the first sectional roll comprises a first nonmagnetic supporting roll sleeve and a first sensor part arranged in the first nonmagnetic supporting roll sleeve; the second sectional roll comprises a second non-magnetic bearing roll sleeve and a second inductor part arranged in the second non-magnetic bearing roll sleeve; the first non-magnetic bearing roller sleeve and the second non-magnetic bearing roller sleeve are connected with the connecting component; the first sectional roll has a length L1, the second sectional roll has a length L2, l1=l2, forming a symmetrical electromagnetic stirring device of the middle section; l1+.l2, forming an asymmetric electromagnetic stirring device with partial sections. The invention can change the action point of the part with weaker magnetic field strength, so that the best metallurgical effect is achieved, the average magnetic field strength and the maximum magnetic field force of casting blanks are greatly increased, and the utilization rate of equipment and the metallurgical effect of products are improved.
Description
Technical Field
The invention relates to the technical field of electromagnetic stirring in a secondary cooling zone of continuous casting, in particular to a high-density magnetic field roller type electromagnetic stirring device for continuous casting of a slab.
Background
Currently, with the progress of slab continuous casting technology, the specific gravity of wide and thick slab continuous casting is also increasing, and the slab width is increasing at 2000mm or more. Since the electromagnetic stirring roller in the continuous casting secondary cooling zone must be similar to a common supporting roller installed on a slab continuous casting machine, the roller diameter is generally not more than 250mm, so that the mechanical strength of the roller electromagnetic stirrer for the roller surface with the length exceeding 2000mm is insufficient, and accidents such as deformation and even fracture of a supporting roller sleeve are likely to occur. In this regard, the industry's processing methods are: 1) The diameter of the roller type electromagnetic stirrer is enlarged, and the roller type electromagnetic stirrer is matched with an auxiliary supporting device for use. The method is suitable for the installation of the auxiliary supporting roller, the sector section is required to be modified, the use and maintenance cost is increased, slag is easy to accumulate on the contact surface of the auxiliary supporting roller and the supporting roller sleeve of the roller type electromagnetic stirrer, and the service lives of the auxiliary supporting roller and the supporting roller sleeve of the roller type electromagnetic stirrer are reduced; 2) The roller type electromagnetic stirrer is made into a sectional roller. The structure of the continuous casting machine can be changed by increasing the roller diameter, the integral magnetic circuit of the stirrer can be disconnected by making the sectional roller, the performance of the electromagnetic roller stirrer is affected, and the electromagnetic thrust is greatly reduced.
In the actual production process, the electromagnetic field of the traditional continuous casting slab two-cold-zone sectional roller type electromagnetic stirring device cannot meet the metallurgical requirement. In view of the defects of the conventional electromagnetic stirring device in the secondary cooling zone of the continuous casting slab, the invention provides the position-adjustable high-density magnetic field roller type electromagnetic stirring device for slab continuous casting, which overcomes the defects in the prior art.
As shown in fig. 1 and 2, the conventional electromagnetic stirring device senses a coil including a gram ring winding 1, a salient pole iron core 2 and teeth 10, and the sensor is directly arranged in a supporting roller sleeve. The ratio of the sections of the winding 1 and the iron core 2 is smaller due to the limitation of the installation space in the roller sleeve, and the number of turns of the coil and the magnetic conduction area of the iron core 2 are correspondingly smaller; under the condition of operation, the generated magnetic field diverges and is distributed around the iron core 2, and the magnetic leakage is large, so that the magnetic field of the working surface is reduced, and the magnetic induction intensity is not high. These deficiencies make the electromagnetic thrust of the roller type electromagnetic stirrer small.
In the actual production process, the electromagnetic field of the traditional continuous casting slab two-cold-zone sectional roller type electromagnetic stirring device cannot meet the metallurgical requirement. In view of the defects of the conventional electromagnetic stirring device in the secondary cooling zone of the continuous casting slab, the invention provides the position-adjustable high-density magnetic field roller type electromagnetic stirring device for slab continuous casting, which overcomes the defects in the prior art.
Disclosure of Invention
The invention aims to provide a slab continuous casting high-density magnetic field roller type electromagnetic stirring device, which can solve the problems of insufficient effective acting magnetic field intensity, insufficient electromagnetic stirring force and the like of the traditional continuous casting slab two-cold-zone sectional roller type electromagnetic stirring device and improve the metallurgical effect of a wide and thick slab casting blank.
The technical scheme of the invention is as follows: the slab continuous casting high-density magnetic field roller type electromagnetic stirring device comprises a connecting component, a first sectional roller connected to one end of the connecting component, and a second sectional roller connected to the other end of the connecting component; the first sectional roll comprises a first nonmagnetic supporting roll sleeve and a first sensor part arranged in the first nonmagnetic supporting roll sleeve; the second sectional roll comprises a second non-magnetic bearing roll sleeve and a second inductor part arranged in the second non-magnetic bearing roll sleeve; the first non-magnetic bearing roller sleeve and the second non-magnetic bearing roller sleeve are connected with the connecting component; the first sectional roll has a length L1, the second sectional roll has a length L2, l1=l2, forming a symmetrical electromagnetic stirring device of the middle section; l1+.l2, forming an asymmetric electromagnetic stirring device with partial sections.
In the scheme, according to the main casting blank width of the continuous casting machine, the proper L1 first sectional roller and the proper L2 second sectional roller are used, and the lengths L1 and L2 can be adjusted, so that the electromagnetic stirring device is of an asymmetric structure, and the connecting part with a weaker magnetic field deviates from the casting blank as much as possible; or the electromagnetic stirring device is of a symmetrical structure, so that the intensity of a high-density magnetic field is increased, and the electromagnetic stirring force is improved.
Preferably, the first inductor part comprises a first non-cogged iron core, a first winding part, a first mounting block and a first copper sleeve, wherein a plurality of first mounting blocks are arranged on the outer surface of the first non-cogged iron core, the first winding part is wound on the first non-cogged iron core and is separated by the plurality of first mounting blocks, and the first copper sleeve is sleeved outside the first winding part; the second inductor portion is identical in structure to the first inductor portion.
Preferably, a notch is arranged on the first copper sleeve, the part of the first winding, which is opened by the notch, is a working surface, and the rest parts which are covered are non-working surfaces.
Preferably, the first copper sleeve is of a variable cross-section structure, and the cross-section thickness of the first copper sleeve gradually decreases from the middle part to two ends forming the notch.
Preferably, the first mounting block is provided with a plurality of groups in the axial direction of the first slotless iron core, and each group is provided with a plurality of circumferentially distributed groups.
Preferably, the first sensor portion has an electrical parameter a, and the second sensor portion has an electrical parameter B, a=b, or a+.b.
Preferably, the first inductor part has a first winding mode structure therein, and the second inductor part has a second winding mode structure therein, and the first winding mode structure is the same as or different from the second winding mode structure.
Preferably, the winding pattern structure comprises the direction of revolution and/or the number of turns of the winding.
Compared with the related art, the invention has the beneficial effects that:
1. according to the slab continuous casting high-density magnetic field roller type electromagnetic stirring device, through adjusting the positions of the connecting parts, the roller type electromagnetic stirring device can be designed into a partial section mode or a middle section mode according to the actual condition of the width of a casting blank and the metallurgical effect to be achieved, and the action points of the weaker parts of the magnetic field strength are changed, so that the optimal metallurgical effect is achieved, the average magnetic field strength and the maximum magnetic field force of the casting blank are greatly increased, and the utilization rate of equipment and the metallurgical effect of products are improved;
2. the slab continuous casting high-density magnetic field roller type electromagnetic stirring device has the advantages that the iron cores of the first sectional roller and the second sectional roller are designed into a tooth-groove-free circular structure, so that the space utilization rate of windings can be improved to the greatest extent, the ampere-turns of coils and the magnetic conduction area of the iron cores are increased, and the magnetic field intensity is increased. Compared with the traditional symmetrical sectional roller, the number of turns of a winding is increased by 20%, and the electromagnetic force is about 120% of that of the traditional sectional roller type electromagnetic stirring roller;
3. compared with the traditional split-roller type electromagnetic stirring device, the slab continuous casting high-density magnetic field roller type electromagnetic stirring device is characterized in that a copper sleeve with a notch is additionally arranged between a supporting roller sleeve and a winding part. The notch surface of the copper sleeve is a working surface, and the rest outer surfaces are non-working surfaces, so that the magnetic field can be prevented from leaking from the direction of no work to the greatest extent, the magnetic field strength of the working surface is increased by 80%, the electromagnetic thrust is enhanced, and the energy efficiency ratio, namely the effective utilization rate of power, is improved;
4. the slab continuous casting high-density magnetic field roller type electromagnetic stirring device is provided with a copper sleeve with a notch, and the leakage magnetic field at the periphery of the roller type electromagnetic stirring device is greatly weakened. When the leakage magnetic field permeates the copper sleeve, the leakage magnetic field strength is rapidly reduced along with the increase of the permeation depth due to the high conductivity of the leakage magnetic field, and finally, the leakage magnetic field outside the roller type electromagnetic stirring device is very weak. The design of the copper material and the variable cross-section thickness of the copper sleeve is important.
Drawings
FIG. 1 is a schematic diagram of a conventional electromagnetic stirring device inductor;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a schematic view showing a structure and a partial cross section of a slab continuous casting high-density magnetic field roller type electromagnetic stirring device provided by the invention;
FIG. 4 is a schematic view of the structure of the first inductor portion;
FIG. 5 is a schematic cross-sectional view of FIG. 1;
fig. 6 is a schematic structural view of a first slotless core;
FIG. 7 is a side view of FIG. 6;
fig. 8 is a schematic cross-sectional view of a first copper sleeve.
Detailed Description
The invention will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. For convenience of description, the words "upper", "lower", "left" and "right" are used hereinafter to denote only the directions corresponding to the upper, lower, left, and right directions of the drawings, and do not limit the structure.
As shown in fig. 3, the slab continuous casting high-density magnetic field roller type electromagnetic stirring device provided by the embodiment comprises a connecting component 6, a first sectional roller 5 connected to one end of the connecting component 6, and a second sectional roller 7 connected to the other end of the connecting component 6. The first sectional roll 5 comprises a first nonmagnetic support roll sleeve 3 and a first inductor section 4 provided in the first nonmagnetic support roll sleeve 3. The second sectional roll 7 comprises a second non-magnetic bearing roll mantle 8 and a second inductor portion 9 provided in the second non-magnetic bearing roll mantle 8. The first nonmagnetic supporting roller sleeve 3 and the second nonmagnetic supporting roller sleeve 8 are connected with the connecting component 6. The first sectional roll 5 has a length L1, the second sectional roll 7 has a length L2, l1=l2, forming a symmetrical electromagnetic stirring device of the middle section; l1+.l2, forming an asymmetric electromagnetic stirring device with partial sections.
As shown in fig. 4 and 5, the first inductor portion 4 includes a first slotless core 41, a first winding portion 42, a first mounting block 43 and a first copper sleeve 44, wherein the first mounting block 43 is arranged on the outer surface of the first slotless core 41, and the first winding portion 42 is wound on the first slotless core 41 and is separated by a plurality of first mounting blocks 43. The first copper sleeve 44 is sleeved outside the first winding part 42, so that leakage of the magnetic field from one side without acting is prevented to the greatest extent. The second inductor portion 9 is identical in construction to the first inductor portion 4. The same structure means that the second inductor part 9 also comprises a slotless core, a winding part, a mounting block and a copper sleeve, and the assembly relation of the parts is the same, and the part structure is the same (except for the winding part).
After alternating current is supplied to the first inductor part 4 and the second inductor part 9, a traveling wave magnetic field is excited, and electromagnetic force is generated.
As shown in fig. 6 and 7, the first mounting blocks 43 are arranged in a plurality of groups in the axial direction of the first slotless core 41, and each group is circumferentially distributed. The first inductor portion 4 has an electrical parameter a and the second inductor portion 9 has an electrical parameter B, a=b, or a+.b.
In practice, the electrical parameters used by the first inductor portion 4 and the second inductor portion 9 may or may not be identical. The winding pattern structures of the first winding portion 42 of the first inductor portion 4 and the winding portion of the second inductor portion 9 may be the same or different. The winding mode structure comprises a revolving direction and/or the gate number of the winding. The magnetic field strength of the first and second sectional rolls 5 and 7 is optimized by adjusting the electrical parameters.
As shown in fig. 4 and 8, the first copper sleeve 44 is provided with a notch, the open portion of the first winding portion 42 is a working surface, and the remaining covered portion is a non-working surface. The first copper sleeve 44 has a variable cross-section structure, and the cross-section thickness thereof gradually decreases from the middle to the two ends forming the notch. In this embodiment, the first copper sleeve 44 is in an upward C shape, and the thickness of the middle part of the C shape is greater than that of the two ends, and is a symmetrical variable cross section (as shown in fig. 8).
The connecting part 6 is free of iron core rotation, and is internally provided with a bearing for connecting and supporting. By adjusting the control of the connecting part 6, the adjustment of the length of the first and second sectional rolls 5, 7 is achieved.
The lengths of the first nonmagnetic supporting roller sleeve 3 and the second nonmagnetic supporting roller sleeve 8 are 300-2000 mm, the outer diameter of the supporting roller sleeve is phi 100-phi 400mm, the nonmagnetic supporting roller sleeve has good high temperature resistance and wear resistance, and the service life of equipment is prolonged. And the first non-magnetic bearing roller sleeve 3 and the second non-magnetic bearing roller sleeve 8 can be customized in length selection according to the metallurgical requirements of actual production casting blanks.
As shown in fig. 3, the ends of the first sectional roller 5 and the second sectional roller 7 are sequentially connected with a wire outlet box assembly 1a (1 b) and a water outlet barrel part 2a (2 b). The water outlet cylinder and the outlet box are the prior art, and are not improvement points of the invention, and the structure and the functional principle of the water outlet cylinder and the outlet box are not repeated here.
The invention optimizes the structural design of the inductor by adjusting the lengths of the nonmagnetic supporting roller sleeves in the two sectional rollers, and can be suitable for continuous casting machines with different sections. The increase of electromagnetic force is 100% by the round iron core without tooth slot and the copper sleeve with notch. The technology has the advantages of high energy density, high cleanliness, high reliability and the like, and has important significance for improving the quality of casting blanks: the surface, subcutaneous and internal quality of the casting blank, such as middle crack, center porosity, center shrinkage cavity and center segregation, are effectively improved; make up for the influence of some continuous casting processes; expanding the range of continuous casting steel types; is beneficial to improving the pulling speed and the productivity.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.
Claims (8)
1. The slab continuous casting high-density magnetic field roller type electromagnetic stirring device is characterized by comprising a connecting component (6), a first sectional roller (5) connected to one end of the connecting component (6), and a second sectional roller (7) connected to the other end of the connecting component (6); the first sectional roll (5) comprises a first nonmagnetic supporting roll sleeve (3) and a first inductor part (4) arranged in the first nonmagnetic supporting roll sleeve (3); the second sectional roll (7) comprises a second non-magnetic bearing roll sleeve (8) and a second inductor part (9) arranged in the second non-magnetic bearing roll sleeve (8); the first nonmagnetic supporting roller sleeve (3) and the second nonmagnetic supporting roller sleeve (8) are connected with the connecting component (6); the first sectional roll (5) has a length L1, the second sectional roll (7) has a length L2, l1=l2, forming a symmetrical electromagnetic stirring device of the middle section; l1+.l2, forming an asymmetric electromagnetic stirring device with partial sections.
2. The slab continuous casting high-density magnetic field roller type electromagnetic stirring device according to claim 1, wherein the first inductor part (4) comprises a first slotless iron core (41), a first winding part (42), first mounting blocks (43) and first copper sleeves (44), the first mounting blocks (43) are distributed on the outer surface of the first slotless iron core (41), the first winding part (42) is wound on the first slotless iron core (41) and is separated by the first mounting blocks (43), and the first copper sleeves (44) are sleeved outside the first winding part (42); the second inductor portion (9) is identical in structure to the first inductor portion (4).
3. The slab continuous casting high-density magnetic field roller type electromagnetic stirring device according to claim 2, characterized in that a notch is arranged on the first copper sleeve (44), the open part of the first winding part (42) is a working surface, and the rest covered parts are non-working surfaces.
4. A slab continuous casting high-density magnetic field roller type electromagnetic stirring device according to claim 3 characterized in that the first copper bush (44) has a variable cross-section structure, and the cross-section thickness thereof gradually decreases from the middle part to the two ends forming the notch.
5. The slab continuous casting high-density magnetic field roller type electromagnetic stirring device according to claim 2, wherein a plurality of groups of the first mounting blocks (43) are distributed in the axial direction of the first slotless core (41), and each group is distributed in a plurality of groups circumferentially.
6. Slab casting high-density magnetic field roll electromagnetic stirring device according to claim 1 characterized in that the first inductor part (4) has an electrical parameter a and the second inductor part (9) has an electrical parameter B, a = B, or a+.b.
7. The slab continuous casting high-density magnetic field roller type electromagnetic stirring device according to claim 1, wherein the first inductor part (4) is internally provided with a first winding mode structure, and the second inductor part (9) is internally provided with a second winding mode structure, and the first winding mode structure is the same as or different from the second winding mode structure.
8. The slab casting high-density magnetic field roll type electromagnetic stirring device according to claim 7, wherein the winding mode structure comprises a direction of revolution and/or a number of turns of windings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310646021.XA CN116493558A (en) | 2023-06-02 | 2023-06-02 | High-density magnetic field roller type electromagnetic stirring device for slab continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310646021.XA CN116493558A (en) | 2023-06-02 | 2023-06-02 | High-density magnetic field roller type electromagnetic stirring device for slab continuous casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116493558A true CN116493558A (en) | 2023-07-28 |
Family
ID=87318496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310646021.XA Pending CN116493558A (en) | 2023-06-02 | 2023-06-02 | High-density magnetic field roller type electromagnetic stirring device for slab continuous casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116493558A (en) |
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2023
- 2023-06-02 CN CN202310646021.XA patent/CN116493558A/en active Pending
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