CN1440846A - Electromagnetic side sealing method and device for double-roller casting-rolling of thin band steel - Google Patents
Electromagnetic side sealing method and device for double-roller casting-rolling of thin band steel Download PDFInfo
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- CN1440846A CN1440846A CN 02110922 CN02110922A CN1440846A CN 1440846 A CN1440846 A CN 1440846A CN 02110922 CN02110922 CN 02110922 CN 02110922 A CN02110922 A CN 02110922A CN 1440846 A CN1440846 A CN 1440846A
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- side sealing
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 26
- 238000007789 sealing Methods 0.000 title claims abstract description 26
- 239000010959 steel Substances 0.000 title claims abstract description 26
- 238000005096 rolling process Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000005291 magnetic effect Effects 0.000 claims abstract description 47
- 230000005672 electromagnetic field Effects 0.000 claims abstract description 21
- 238000005266 casting Methods 0.000 claims description 46
- 238000009413 insulation Methods 0.000 claims description 14
- 239000004020 conductor Substances 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 abstract description 5
- 230000008018 melting Effects 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 11
- 239000000498 cooling water Substances 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 230000006698 induction Effects 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000011162 core material Substances 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 206010020843 Hyperthermia Diseases 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000036031 hyperthermia Effects 0.000 description 2
- 239000000077 insect repellent Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The present invention relates to electromagnetic side sealing method and device for double-roller casting-rolling of thin band steel. Alternate current is applied to electromagnetic coils set on two ends of the casting-rolling melting bath to form alternate electromagnetic field on the ends with alternate magnetic force lines divergent towards peripheral or convergent reversely, and current induced inside the melting bath and the alternate electromagnetic field act to produce electromagnetic force, which pushes and encloses molten steel inside the molting bath. The sealing device includes electromagnetic coils on two ends of the melting bath and heat insualting boards between a electromagnetic coil and the melting bath. The present invention can increase working magnetic field strength via increasing turns of coils.
Description
Technical field
The present invention relates to the continuous casting installation for casting technology, particularly the side dam technology of strip casting process.
Background technology
Double-roller casting-rolling of thin band steel be exactly between a pair of water cooled rolls (crystallizer) that rotates in opposite directions directly the pouring liquid metal cast continuously and rolling new technology.Its pool side front cover directly is a key issue.At present, generally adopt the side seal board of refractory materials such as quartzy class or aluminium oxide, i.e. the solid side seal.Since the restriction of side seal board material and this mechanical side seal mode, solid side seal usually can exist side seal board service life low, cost is high, casting strip quality is inhomogeneous, limit portion is because side seal is tight produces overlap, burr or defective such as be torn.
Rely on electromagnetic force shutoff molten bath end face, replace the solid side seal board, promptly electromagnetic side sealing is a new direction of present side dam technology development.
The principle of electromagnetic side sealing is to apply alternating electromagnetic field in casting end, roller molten bath, alternating magnetic field produces induced-current in the molten steel that closes on, magnetic field and induced-current interact and produce electromagnetic force, form the electromagnetism lateral pressure at the molten bath end face, rely on this electromagnetic pressure constraint shutoff molten bath.
Aspect side seal, the roll gap molten bath sidepiece that acts on the double-roll type casting and rolling machine is the magnetic pressure of any arbitrarily, must could realize side seal greater than static pressure and other dynamic pressure of molten steel self.Realize this goal, regularly must manage to improve the magnetic induction intensity in magnetic field of living in, end, molten bath at the casting object.The electromagnetic field generator design just becomes the raising magnetic field intensity, and makes the close side seal molten bath of high-intensity magnetic field part to produce the effective way of big electromagnetic side sealing power.
According to the electromagnetic suspension principle, by applying alternating current at the solenoid that is positioned at casting roller two ends, alternating current produces alternating electromagnetic field in end, casting molten bath, alternating electromagnetic field is owing to closing on the molten steel molten bath and in the molten bath induced currents, alternating magnetic field and induced-current interact and produce electromagnetic force, rely on this electromagnetic pressure repulsion and block molten steel in the casting-rolling of thin band steel molten bath, realize electromagnetic side sealing.The maglev suspending power direction of traditional electrical upwards to overcome object gravity, realizes contactless melting; The present invention is actually a suspending power direction and has rotated 90 °, makes it point to the side, molten bath, and it is electromagnetic side sealing power that suspending power has become lateral restriction.
The U.S. landlocked steel company began to develop electromagnetic side sealing (EMD) technology in 1989.It discloses the direct solenoid side sealing method in European patent EP 0679461B1, promptly in the molten bath, lead to direct current, apply dc electromagnetic field in the casting roll end, magnetostatic field that direct current produces and the DC current effect in the molten bath produce electromagnetic force, rely on this electromagnetic force shutoff molten bath.European patent EP 0867243A1 then adopts the mutual inductance type side seal of alternating electromagnetism coil+iron core.5695001 of U.S. Pat are directly to the exciting current conductor plate indirect currents of end, molten bath, and deflector is divided into three, and energising respectively increases the regulating measure in magnetic field, has improved Distribution of Magnetic Field.
Though when the mutual inductance type side seal of alternating electromagnetism coil+iron core exists in big electric current in coil portion magnetic field may be subjected to the iron core material to limit real work magnetic field not high very greatly, and many electromagnetic energies are lost in the first-class problem of the heating of iron core.The deflector technology then exists owing to adopt polylith electrical conductor plate, do not connect mutually, and energising respectively, thereby cause problems such as can't under same electric current, effectively improving magnetic field intensity.
Summary of the invention
The object of the present invention is to provide a kind of above-mentioned technical deficiency of avoiding, can effectively increase a kind of electromagnetic side sealing method and device that is used for double-roller casting-rolling of thin band steel of work magnetic field intensity.
For achieving the above object, technical solution of the present invention is:
A kind of electromagnetic side sealing method that is used for double-roller casting-rolling of thin band steel, two ends in the casting molten bath are provided with solenoid, solenoid is applied alternating current, alternating current produces alternating electromagnetic field in end, casting molten bath, alternating electromagnetic field is owing to closing on the molten steel molten bath and in the molten bath induced currents, alternating electromagnetic field and induced-current interact and produce electromagnetic force, rely on this electromagnetic pressure repulsion and block molten steel in the casting-rolling of thin band steel molten bath, solenoid is arranged on the end face outside, molten bath, distance L apart from casting roller end face is: 0＜L≤1cm, the magnetic line of force of the alternating electromagnetic field that solenoid produces is dispersed towards periphery by in the middle of the end face of molten bath, or restrains to the centre around the end face of molten bath; The solenoid axis is vertical with the molten bath end face.
A kind of electromagnetic side sealing device that is used for double-roller casting-rolling of thin band steel comprises the solenoid, the thermal insulation board that are divided into casting molten bath both side ends; Described thermal insulation board is arranged between solenoid and the molten bath, and to prevent the hyperthermia radiation influence of molten bath to solenoid, thermal insulation board can adopt ceramic material, can not form shielding to magnetic field; The number of turn of described solenoid is at least 1 circle, and every circle coil section is a variable cross-section, adopts change coil section size to change current density, with the magnetic field intensity of local modulation coil diverse location generation.
Described solenoid is a spring structure, and the solenoid number of turn is at least 1 circle, and the profile of solenoid and cross section, molten bath are similar.
Described solenoid also can be tray type structure, and the solenoid number of turn is at least 1 circle, and the profile of solenoid and cross section, molten bath are similar.
As further improvement, described solenoid also is provided with an electro-magnetic shielding cover outward, and the shape of this radome and solenoid winding profile are supporting.Described radome is that high magnetic conductive material is made, and takes cooling provision.To reduce the loss of magnetic field in the coil external space, improve the magnetic field intensity of molten bath sidepiece, the Distribution of Magnetic Field of improving the molten bath sidepiece simultaneously improves binding effect, also can prevent the induction loss of alternating electromagnetic field to the casting and rolling machine steel construction.
As further improving, also comprise collars, this collars is arranged on the casting roll end, is fixedly connected on the casting roller roll body, has a plurality of slits along collars along the collars circumference, to increase the magnetic effect; Casting roll surface at the casting roller is not low conduction, low permeability magnetic material especially, and the casting roll end more need be added the stainless steel collars, with the saturating magnetic effect of further increase.
Casting roller or both ends adopt low conduction, low permeability magnetic material such as stainless steel to make, and generate heat with the induction that prevents casting roller itself, and strengthen the magnetic field intensity of passing the end, molten bath.
The invention has the advantages that, the alternating magnetic field magnetic line of force is dispersed by coil (or molten bath end face) middle (both sides) towards periphery in the direct side sealing method of coil type of the present invention, or assemble to middle (both sides) convergence on every side from coil (or molten bath end face), but not the magnetic line of force points to opposite side from a side of molten bath end face in the prior art.Adopt coil type structure of the present invention, can be by increasing effectively increase work magnetic field intensity of coil turn, do not have that polylith electrical conductor plate does not connect mutually in the deflector technology, can't under same electric current, effectively improve problems such as magnetic field intensity; Solenoid of the present invention is near side, casting molten bath simultaneously, the gap is little between coil and the side, molten bath, do not exist iron core formula device to be difficult to problems such as raising because the iron core material limits the work magnetic field intensity that exists when big electric current, loss of field is little, can increase the work magnetic field intensity effectively; The present invention does not simultaneously have iron core manufacturing and material restricted problem.
Description of drawings
Fig. 1 is an enforcement schematic diagram of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is a kind of version schematic diagram of solenoid among the present invention.
Fig. 4 is the another kind of version schematic diagram of solenoid among the present invention.
Fig. 5 is the A-A cutaway view of Fig. 3.
Fig. 6 is the B-B cutaway view of Fig. 4.
Fig. 7 is the schematic perspective view of electro-magnetic shielding cover among the present invention.
Fig. 8 is the partial structurtes schematic diagram of collars among the present invention.
Fig. 9 is the schematic diagram of thermal insulation board among the present invention.
The local enlarged diagram that Figure 10 is provided with for solenoid of the present invention.
Figure 11 local enlarged diagram that solenoid is provided with during for band collars of the present invention.
The specific embodiment
As Fig. 1, shown in Figure 2, at the two ends in casting molten bath 3 solenoid 2a is set, 2b, to solenoid 2a, 2b applies alternating current, alternating current produces alternating electromagnetic field in 3 ends, casting molten bath, alternating electromagnetic field is 3 induced currents owing to closing on molten steel molten bath 3 and in the molten bath, alternating electromagnetic field and induced-current interact and produce electromagnetic force, rely on this electromagnetic pressure repulsion and block molten steel 4 in the casting-rolling of thin band steel molten bath 3, solenoid 2a, 2b is arranged on the 3 end faces outside, molten bath, apart from casting roller 1a, the distance L of 1b is 0.2cm or L=0.5cm, as shown in figure 10; The magnetic line of force of the alternating electromagnetic field that solenoid 2a, 2b produce is dispersed towards periphery by in the middle of 3 end faces of molten bath, or from or molten bath 3 end faces around restrain to the centre; Solenoid 2a, 2b axis are vertical with molten bath 3 end faces.
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 7, the electromagnetic side sealing device comprises solenoid 2a, the 2b, thermal insulation board 6a, the 6b that are divided into casting molten bath 3 both side ends; Thermal insulation board 6a, 6b are arranged between solenoid 2a, 2b and the molten bath 3, are fixed on the side of solenoid near molten bath one side; Solenoid 2a, 2b are spring structure for one kind, and another kind is a tray type structure, and solenoid 2a, the 2b number of turn are at least 1 circle, and the profile of solenoid 2a, 2b and 3 cross sections, molten bath are similar.
Described solenoid 2a, 2b cross section are variable cross-section.Solenoid 2a, 2b make of fine copper, and each circle surface is coated with insullac, and device is under the cooling protection of cooling water 9.According to concrete casting-rolling technology, the number of turn of solenoid is a multiturn, and the coil overall shape is corresponding with casting roller profile, and coil height is corresponding with melt pool height.Cooling flowing path such as Fig. 5, shown in Figure 6 seal insert structure 81,82 one-tenth cooling water path 9 by copper coil adjacent turn copper coin 21,22 and two, and cooling water path 9 is connected with flow of cooling water during work.
Referring to Fig. 2, Fig. 7, the also sheathed outward electro-magnetic shielding cover 5 of described solenoid 2a, 2b, the shape of this radome 5 and solenoid 2a, 2b winding profile are supporting.
Described radome 5 is made for high magnetic conductive material.
Referring to Fig. 2, Fig. 8, Figure 10, collars 7 are arranged on casting roller 1a, 1b end, are fixedly connected on casting roller 1a, the 1b roll body, have a plurality of slits 71 along collars 7 circumference.
Casting roller 1a, 1b both ends adopt low conduction, low permeability magnetic material such as stainless steel to make, and generate heat with the induction that prevents casting roller itself, and strengthen the magnetic field intensity of passing the melt end.The casting roll surface adopts stainless steel to make, and also can adopt in casting roller 1a, 1b end and add stainless steel collars 7, and the collars structure as shown in Figure 8.
Between coil 2a, 2b and molten bath 3, thermal insulation board 6 is set, to prevent the hyperthermia radiation influence of molten bath to solenoid.Thermal insulation board 6 adopts ceramic material, can not form shielding to magnetic field.Thermal insulation board 6 profiles are corresponding with casting roller 1 profile and casting molten bath 3, and its shape as shown in Figure 9.Thermal insulation board 6 is installed between casting roller 1 a and the casting roller 1b, and is close to and is fixed on coil 2a, 2b near on the side in molten bath 3, as shown in Figure 2.
A kind of structure of solenoid 2a, 2b is seen Fig. 3, Fig. 5, and on the whole, it is just as a non-circular deformed spring.Its structure main feature comprises: (1) contoured design, reduce the supporting structural requirement of casting and rolling machine; (2) be multi-turn structure,, overcome guide plate type side seal deflector and can not form the weak deficiency in wire loop magnetic field under constant current, effectively to improve magnetic field intensity; (3) every circle coil section adopts variable cross-section, with current density in the change coil different parts, thereby regulates local magnetic field strength.Cooling flowing path as shown in Figure 5, being inserted by copper coil 2 adjacent turn copper coins 21,22 and two sealings 81,82 constitutes cooling water path, cooling water path is connected with flow of cooling water during work.
The another kind of structure of solenoid 2a, 2b is seen Fig. 4, Fig. 6, and on the whole, it is just as a non-circular special-shaped mosquito repellent coil disc, and its structure main feature comprises: (1) contoured design, reduce the supporting structural requirement of casting and rolling machine; (2) be multi-turn structure, under constant current, effectively to improve magnetic field intensity, overcome guide plate type side seal deflector and can not form the weak deficiency in wire loop magnetic field, and, realize the even side seal in molten bath because this mosquito-repellent incense tray type structure can increase central magnetic field intensity by the number of turn at its center.Cooling flowing path as shown in Figure 6, being inserted by copper coil 2 adjacent turn copper coins 21,22 and two sealings 81,82 constitutes cooling water path 9, cooling water path 9 is connected with flow of cooling water during work.
Under alternating current, can directly produce enough strong, the rational alternating electromagnetic field that distributes by this device, realize electromagnetic side sealing in end, casting molten bath.Do not exist iron core formula EMD device when big electric current because the iron core material limits the problem that the molten bath regional work magnetic field intensity that exists is difficult to improve, and polylith electrical conductor plate does not connect mutually in the deflector technology, can't under same electric current, effectively improve problems such as magnetic field intensity, therefore in double-roller casting-rolling of thin band steel technology and equipment, be applied.
Claims (7)
1. electromagnetic side sealing method that is used for double-roller casting-rolling of thin band steel, two ends in the casting molten bath are provided with solenoid, solenoid is applied alternating current, alternating current produces alternating electromagnetic field in end, casting molten bath, alternating electromagnetic field is owing to closing on the molten steel molten bath and in the molten bath induced currents, alternating electromagnetic field and induced-current interact and produce electromagnetic force, rely on this electromagnetic pressure repulsion and block molten steel in the casting-rolling of thin band steel molten bath; It is characterized in that: solenoid is arranged on the molten bath end face outside, is 0＜L≤1cm apart from the distance of casting roller, and the magnetic line of force of the alternating electromagnetic field that solenoid produces is dispersed towards periphery by in the middle of the end face of molten bath, or restrains to the centre around the end face of molten bath; The solenoid axis is vertical with the molten bath end face.
2. an electromagnetic side sealing device that is used for the described method of claim 1 comprises the solenoid, the thermal insulation board that are divided into both sides, end, casting molten bath; Described thermal insulation board is arranged between solenoid and the molten bath, is fixed on the side of solenoid near molten bath one side; It is characterized in that: described solenoid is a spring structure, and the solenoid number of turn is at least 1 circle, and the profile of solenoid and cross section, molten bath are similar.
3. an electromagnetic side sealing device that is used for the described method of claim 1 comprises the solenoid, the thermal insulation board that are divided into both sides, end, casting molten bath; Described thermal insulation board is arranged between solenoid and the molten bath, is fixed on the side of solenoid near molten bath one side; It is characterized in that: described solenoid is a tray type structure, and the solenoid number of turn is at least 1 circle, and the profile of solenoid and cross section, molten bath are similar.
4. as the electromagnetic side sealing device of claim 2 or 3, it is characterized in that: described solenoid cross section is a variable cross-section.
5. as the electromagnetic side sealing device of claim 2 or 3, it is characterized in that: the outer also sheathed electro-magnetic shielding cover of described solenoid, the shape of this radome and solenoid winding profile are supporting.
6. as the electromagnetic side sealing device of claim 2 or 3, it is characterized in that: described radome is that high magnetic conductive material is made.
7. as the electromagnetic side sealing device of claim 2 or 3, it is characterized in that: also comprise collars, this collars is arranged on the casting roll end, is fixedly connected on the side of solenoid near molten bath one side, has a plurality of slits along the collars circumference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02110922 CN1278800C (en) | 2002-02-28 | 2002-02-28 | Electromagnetic side sealing method and device for double-roller casting-rolling of thin band steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02110922 CN1278800C (en) | 2002-02-28 | 2002-02-28 | Electromagnetic side sealing method and device for double-roller casting-rolling of thin band steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1440846A true CN1440846A (en) | 2003-09-10 |
| CN1278800C CN1278800C (en) | 2006-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02110922 Expired - Lifetime CN1278800C (en) | 2002-02-28 | 2002-02-28 | Electromagnetic side sealing method and device for double-roller casting-rolling of thin band steel |
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| Country | Link |
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| CN (1) | CN1278800C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106574472A (en) * | 2014-09-04 | 2017-04-19 | 博格华纳公司 | Bus configured latching solenoid |
| CN113441691A (en) * | 2021-01-20 | 2021-09-28 | 重庆大学 | Device and method for realizing electromagnetic side sealing by single-frequency induction heating excitation power supply |
| CN116532622A (en) * | 2023-07-07 | 2023-08-04 | 河北纵横集团丰南钢铁有限公司 | High-temperature molten steel casting blank continuous casting machine |
-
2002
- 2002-02-28 CN CN 02110922 patent/CN1278800C/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106574472A (en) * | 2014-09-04 | 2017-04-19 | 博格华纳公司 | Bus configured latching solenoid |
| CN113441691A (en) * | 2021-01-20 | 2021-09-28 | 重庆大学 | Device and method for realizing electromagnetic side sealing by single-frequency induction heating excitation power supply |
| CN113441691B (en) * | 2021-01-20 | 2022-06-14 | 重庆大学 | Device and method for realizing electromagnetic side sealing by single-frequency induction heating excitation power supply |
| CN116532622A (en) * | 2023-07-07 | 2023-08-04 | 河北纵横集团丰南钢铁有限公司 | High-temperature molten steel casting blank continuous casting machine |
| CN116532622B (en) * | 2023-07-07 | 2023-10-20 | 河北纵横集团丰南钢铁有限公司 | High-temperature molten steel casting blank continuous casting machine |
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| Publication number | Publication date |
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| CN1278800C (en) | 2006-10-11 |
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