CN201313158Y - Electromagnetic brake sheet billet choanoid crystallizer continuous-cast device - Google Patents
Electromagnetic brake sheet billet choanoid crystallizer continuous-cast device Download PDFInfo
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- CN201313158Y CN201313158Y CNU2008200146677U CN200820014667U CN201313158Y CN 201313158 Y CN201313158 Y CN 201313158Y CN U2008200146677 U CNU2008200146677 U CN U2008200146677U CN 200820014667 U CN200820014667 U CN 200820014667U CN 201313158 Y CN201313158 Y CN 201313158Y
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- funnel
- crystallizer
- type crystallizer
- choanoid
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Abstract
The utility model relates to an electromagnetic brake sheet billet choanoid crystallizer continuous-cast device, which belongs to the continous-cast device for continuous casting, and is formed by a choanoid crystallizer, an immersion-type water gap and an electromagnetic brake device. The choanoid crystallizer consists of a wide side wall with a water cooling system and a narrow side wall; the immersion-type water gap is plugged into the choanoid crystallizer. The electromagnetic brake device comprises a magnetic yoke and an iron magnetic core; and the magnetic yoke surrounds the choanoid crystallizer, and the magnetic yoke extends out to be provided with two iron magnetic cores which are intertwined with coil in the wide surface direction of the crystallizer. The shape of the outer surface of the wide side wall of the choanoid crystalier is identical to or similar to that of the inner surface, and the shape of the surface of the iron magnetic core is embedded with the shape of the wide side wall of the choanoid crystallizer. The average magnetic strength within the inner magnetic field area of the choanoid crystallizer is large, and large magnetic strength is produced under the condition of small electric parameters. Compared with the traditional electromagnetic brake, the novel continous-cast device can save the electric power about 40 percent when electromagnetically braking the same flow field.
Description
Technical field
The utility model belongs to the continuous casting installation for casting that casts usefulness continuously, particularly a kind of electromagnetic braking sheet bar funnel-type crystallizer continuous casting installation for casting.
Background technology
Sheet blank continuous casting is a kind of brand-new abbreviated system of the production hot-rolled sheet coil succeeded in developing late 1980s.Because it has characteristics such as high pulling rate, short flow process, production efficiency height, becomes one of important development direction of continuous casting technology.Crystallizer is the core of conticaster.Compare with conventional cut deal billet continuous casting machine crystallizer, the sheet bar funnel-type crystallizer structure is comparatively complicated, and flakiness ratio is bigger, and broad side walls top is the infundibulate projection, and casting speed is bigger, can up to 6m/min in addition more than.The molten liquid steel of high pulling rate can impact the narrow sidewall of crystallizer, damages continuous casting installation for casting, reduces the service life of continuous casting installation for casting, the serious bleed-out accident that causes; Non-metallic inclusion is involved in the molten steel simultaneously, causes the inside and outside defective of strand.For reducing the turbulence intensity that molten steel flows in the crystallizer, reduce the impact of molten steel to crystallizer sidewall (especially narrow sidewall), make steady decline of molten steel and the fluctuation of meniscus place molten steel reduce, form tranquil and hotter meniscus, electromagnetic brake technology is applied to continuous casting.The principle of electromagnetic braking is: feed DC current in coil, produce magnetostatic field, when molten liquid steel is made cutting magnetic line movement, can be at the inner induced-current that produces of molten steel, induced-current and externally-applied magnetic field interaction partners molten steel produce Lorentz force, according to left hand rule, the direction of Lorentz force is opposite with the molten steel flow direction, thereby produces braking effect.Its formula is as follows: F
Em=J * B, and J=σ (E+V * B).In the formula, F is a Lorentz force, and J is an induced-current, and B is a magnetic induction intensity, and V is the molten steel flow velocity, and E is an induced electromotive force.As can be seen, flow velocity is big more from top two formulas, and induced-current is big more, and the Lorentz force that molten steel is subjected to is big more.
Up to now, domain type electromagnetic braking, single bar-type electromagnetic braking and flow control mold three generations technological innovation have been passed through in the development of electromagnetic braking, these development mainly are at cut deal base, square billet continuous casting electromagnetic, and the development of the electromagnetic brake technology of sheet blank continuous casting is also very immature, and the continuous casting installation for casting (number of patent application 95109815.2) that is used to pour into a mould sheet billet has been invented by SMS Shu Luman-Si Ma company.By comparing, we find, one of the summary of the invention of SMS Shu Luman-Si Ma company electro-magnetic braking device has a common ground with the electro-magnetic braking device that is used for generous slab, square blank crystallizer: face the ferromagnetic core regular shape of crystallizer broad side walls, the surface is the plane.For cut deal base, square billet, crystallizer is rectangle or square along the horizontal cross sectional geometry on the short transverse, and each area of section equates, and casting speed not too big (less than 4m/min), and such electro-magnetic braking device can play significant braking effect; But for sheet blank continuous casting, not only casting speed becomes big (more than the 4.5m/min), and the structure of funnel-type crystallizer is more complicated, and its two broad side walls upper semisection mid portions are to outer lug, all the other are the plane, and narrow sidewall is to go up bottom side length, the short isosceles trapezoid in bottom.Narrow sidewall has certain tapering from top to bottom again, if adopt traditional electro-magnetic braking device, then the average distance of ferromagnetic core inner surface and crystallizer broad side walls becomes big, magnetic induction intensity diminishes in crystallizer and broad ways is the comparatively distribution of homogeneous, and for sheet blank continuous casting, submersed nozzle below in the funnel-type crystallizer, molten steel stream thigh near narrow sidewall areas has the trend of impacting narrow sidewall, and speed is bigger, need bigger Lorentz force that it is braked, that is to say needs bigger magnetic induction intensity herein, and relative this zone of other regional magnetic induction intensity can be smaller in the crystallizer.Adopt existing traditional electro-magnetic braking device, need provide very big current strength to guarantee that this zone can produce enough big Lorentz force molten steel is produced braking effect.In other words, adopt traditional brake will expend very big electric energy for the sheet bar funnel-type crystallizer continuous casting.
The utility model content
The purpose of this utility model is in order to overcome the defective of above-mentioned existence, at the particularity of funnel-type crystallizer structure, has improved a kind of electromagnet braking sheet bar funnel-type crystallizer continuous casting installation for casting.This equipment at sheet blank continuous casting, can produce more effective braking effect to molten steel under saves energy, the prerequisite that reduces production costs, improve casting billet surface and internal soundness and enhance productivity.This equipment can successfully be applied to actual production at last.
The utility model electromagnet braking sheet bar funnel-type crystallizer continuous casting installation for casting comprises funnel-type crystallizer, submersed nozzle and electro-magnetic braking device.Funnel-type crystallizer is made of broad side walls that has water-cooling system and narrow sidewall, submersed nozzle inserts in the funnel-type crystallizer, electro-magnetic braking device comprises yoke and ferromagnetic core, magnet yoke ring is around funnel-type crystallizer, yoke is stretched out two ferromagnetic cores that twining coil in wide direction of vertical mold, the shape of the outer surface of funnel-type crystallizer broad side walls is identical with corresponding inner surface configuration or close, and ferromagnetic core surface configuration and funnel-type crystallizer broad side walls shape are chimeric mutually.
1) crystallizer adopts sheet bar funnel-type crystallizer, vertically places.In the middle of its inner chamber top is the infundibulate projection, the shape approximation rectangle of both sides and bottom.The broad side walls of crystallizer and narrow sidewall have water-cooling system.It is identical with corresponding inner surface configuration that the broad side walls of the utility model funnel-type crystallizer and the outer surface of narrow sidewall are designed to, but not flat face.The shape of narrow sidewall is to go up bottom side length, the short isosceles trapezoid in bottom, and the angle of two waists and the longitudinal axis (being broad side walls and longitudinal axis angle) is α.
2) height of electro-magnetic braking device is generally 100mm～300mm by the shape and the casting speed decision at the mouth of a river, and its upper surface position can be concordant with the submersed nozzle pelvic outlet plane; Also can be higher than or be lower than mouth of a river pelvic outlet plane, difference in height between the two is generally in 300mm.The width of ferromagnetic core and crystallizer width equate.Ferromagnetic core connects yoke, and magnet yoke ring is around the crystallizer setting.
3) face the surperficial non-rule of the ferromagnetic core of funnel-type crystallizer broad side walls: the external surface shape of the broad side walls of the crystallizer on ferromagnetic core surface configuration and the sustained height is chimeric mutually; Side view on the thickness direction is a right-angled trapezium, and two waist angles (being ferromagnetic core surface and longitudinal axis angle) are β, and the difference of α and β is in 30 ° of scopes.The ferromagnetic core thickness direction is identical with the narrow sidewall direction of funnel-type crystallizer.Accordingly, the outer surface of ferromagnetic core inner surface and funnel-type crystallizer broad side walls leaves air-gap, and its width is generally between 2mm～5mm.
For sheet bar funnel-type crystallizer, the utility model compared with the prior art has tangible advantage and effect.Different with the traditional electrical magnetic detents is, the average distance of one of content of the present utility model ferromagnetic core and funnel-type crystallizer broad side walls will be far smaller than the distance between conventional iron magnetic core and the funnel-type crystallizer broad side walls, therefore, under the same electrical parameter condition, the average magnetic induction intensity under the funnel-type crystallizer internal magnetic field regional extent of employing new braking device can be bigger.On the other hand, because ferromagnetic core surface configuration and funnel-type crystallizer broad side walls shape are chimeric mutually, in the horizontal direction, the ferromagnetic core cross section is the trend of the thick intermediate thin in both sides, and promptly middle is the rectangular shape of crescent breach; In the vertical direction, the ferromagnetic core cross section is a right-angled trapezium.Correspondingly, everywhere magnetic induction intensity skewness in the funnel-type crystallizer, on short transverse, magnetic induction intensity strengthens from top to bottom gradually, and on width, magnetic induction intensity strengthens gradually from the centre to both sides.Compare by the result with the flow field, as can be seen, the zone of magnetic induction intensity maximum by chance is that molten liquid steel will impact narrow sidewall of funnel-type crystallizer and molten steel flowing velocity larger part, needs bigger Lorentz force braking molten steel.Near the zone of narrow sidewall, higher magnetic induction intensity flows down the bigger Lorentz force of generation in high velocity liquid below the mouth of a river, and the molten steel flow direction becomes downwards, has avoided the impact of molten steel to narrow sidewall effectively, makes molten steel steadily dirty; Simultaneously, Lorentz force has limited steel and has flowed to upward flowing velocity, reduces turbulent flow, reduces meniscus, avoids being involved in of covering slag.What deserves to be mentioned is, compare that the brake apparatus ferromagnetic core average thickness of one of the utility model content increases, can guarantee under small electric parameter condition, to produce bigger magnetic induction intensity with traditional electro-magnetic braking device; Same flow field is braked, and electromagnet braking sheet bar funnel-type crystallizer continuous casting installation for casting can be saved 40% electric energy.New braking device ferromagnetic core surface configuration and funnel-type crystallizer broad side walls are chimeric intact, for sheet bar funnel-type crystallizer, because the particularity of funnel-type crystallizer broad side walls external surface shape ferromagnetic core surface configuration, under the same electrical parameter, make its braking effect will be better than the traditional braking device far away.
Description of drawings
Fig. 1 is the profile of electromagnetic braking sheet bar funnel-type crystallizer continuous casting installation for casting along wide center;
Fig. 2 is that A-A of Fig. 1 is to cutaway view;
Fig. 3 is that ferromagnetic core is over against wide structural representation sketch of funnel-type crystallizer;
Among Fig. 1,2,3,1 submersed nozzle, 2 meniscus, effluent outlet in 3 fens, the angle of the 4 crystallizer broad side walls and the longitudinal axis is α, 5 air-gaps, 6 ferromagnetic cores, 7 yokes, 8 coils, 9 ferromagnetic cores surface and longitudinal axis angle β, 10 funnel-type crystallizers, the narrow sidewall of 11 crystallizers, 12 crystallizer broad side walls, 13 ferromagnetic core surface plane parts, 14 ferromagnetic core surface curve parts.
The specific embodiment
As shown in Figure 1, electromagnetic braking sheet bar funnel-type crystallizer continuous casting installation for casting is along the profile at wide center, and sheet blank continuous casting funnel-type crystallizer 10 is made of crystallizer broad side walls 12 that has cooling system and the narrow sidewall 11 of crystallizer.Wherein, crystallizer broad side walls 12 and the angled α 4 of the longitudinal axis.Molten steel flows in the funnel-type crystallizer 10 by two branch effluent outlets 3 of submersed nozzle 1.Include a yoke 7 that surrounds funnel-type crystallizer for suppressing the mobile electro-magnetic braking device of establishing of molten steel, facing the ferromagnetic core 6 that extends two winding arounds 8 on funnel-type crystallizer broad side walls 12 directions on the yoke 7, ferromagnetic core 6 surfaces and the angled β 9 of the longitudinal axis.The upper surface of electro-magnetic braking device can export 3 with 1 fen effluent of submersed nozzle concordantly also can be higher than or be lower than branch effluent outlet 3, its with air-gap 5 thickness of funnel-type crystallizer broad side walls 12 centres generally in the scope of 2mm～5mm.Fig. 2 is that A-A of Fig. 1 is to cutaway view, as can be seen from Figure 2, in order to adapt to the special shape of funnel-type crystallizer broad side walls 12 inner surface intermediate projections, both sides and lower flat, the surface configuration of the outer surface of funnel-type crystallizer broad side walls 12 and ferromagnetic core 6 is designed to identical or close with funnel-type crystallizer broad side walls 12 inner surfaces.Fig. 3 has provided the ferro-magnetic core structure sketch that faces the sheet billet broad side walls, and as can be seen from the figure, ferromagnetic core 6 surfaces are made up of two parts: curvature portion 14 and planar section 13.Ferromagnetic core 6 surface configurations and funnel-type crystallizer broad side walls 12 shapes on the other side are chimeric mutually.Ferromagnetic core 3 surface plane parts 13 and the longitudinal axis β 9 that has a certain degree.On the funnel-type crystallizer thickness direction, the scope of the difference of α and β angle is within 30 °.(when α equates with the angle of β, the magnetic induction intensity maximum of same position in the funnel-type crystallizer).The ferromagnetic core 6 of this shape guaranteed in the funnel-type crystallizer 10 magnetic induction intensity from top to bottom, the trend that from the centre to both sides, strengthens gradually.The magnetic induction intensity that will impact the zone of the narrow sidewall 11 of funnel-type crystallizer at molten steel reaches maximum.The utility model is particularly suitable to sheet bar funnel-type crystallizer.
Structure variable can the according to the form below value:
Use the utility model device, specifically be exemplified below:
Use has the electromagnetic braking sheet bar funnel-type crystallizer continuous casting installation for casting shown in described Fig. 1,2,3, cast continuously with following condition, in funnel-type crystallizer, feed molten liquid steel by submersed nozzle, simultaneously, the coil on the ferromagnetic core is applied DC current.
Casting condition
Casting speed 5m/min
Strand width 1100mm
Slab thickness 50mm
Mouth of a river immersion depth 300mm
Used electric current number of ampere turns 10000An
0 ° of the difference of α and β
The effect of this scheme: in funnel-type crystallizer, the magnetic line of force that electro-magnetic braking device produces is vertical with the molten steel flow direction that flows out from submersed nozzle, formed molten steel and flowed cutting magnetic line and produce bigger Lorentz force, changed the molten steel flow direction, reduced its impact narrow sidewall.The speed of molten steel upper surface reduces, and forms flowing of speed homogeneous in the funnel-type crystallizer exit.Compare with the traditional electrical magnetic detents,, can save nearly 40% electric energy reaching under the identical electromagnetic braking effect situation.
Claims (5)
1, a kind of electromagnetic braking sheet bar funnel-type crystallizer continuous casting installation for casting, comprise funnel-type crystallizer, submersed nozzle and electro-magnetic braking device, funnel-type crystallizer is made of broad side walls that has water-cooling system and narrow sidewall, submersed nozzle inserts in the funnel-type crystallizer, electro-magnetic braking device comprises yoke and ferromagnetic core, magnet yoke ring is around funnel-type crystallizer, yoke is stretched out two ferromagnetic cores that twining coil in vertical mold broad side walls direction, the shape of outer surface that it is characterized in that the funnel-type crystallizer broad side walls is identical with corresponding inner surface configuration or close, and ferromagnetic core surface configuration and funnel-type crystallizer broad side walls shape are chimeric mutually.
2, according to the described a kind of electromagnetic braking sheet bar funnel-type crystallizer continuous casting installation for casting of claim 1, it is characterized in that described ferromagnetic core surface and longitudinal axis angle β, described funnel-type crystallizer broad side walls and longitudinal axis angle α, the difference of α and β is in 30 degree scopes.
3, according to the described a kind of electromagnetic braking sheet bar funnel-type crystallizer continuous casting installation for casting of claim 1, the height that it is characterized in that described electro-magnetic braking device is in the scope of 100mm～300mm, and the upper surface of electro-magnetic braking device and the outlet of submersed nozzle difference in height between the two are in 300mm.
4, according to the described a kind of electromagnetic braking sheet bar funnel-type crystallizer continuous casting installation for casting of claim 1, it is characterized in that leaving between funnel-type crystallizer broad side walls and the ferromagnetic core the wide air-gap of 2mm～5mm.
5, according to claim 1,2 or 4 described a kind of electromagnetic braking sheet bar funnel-type crystallizer continuous casting installation for casting, it is characterized in that on the ferromagnetic core of electro-magnetic braking device the direct current hot-wire coil being installed, the number of turn is adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200146677U CN201313158Y (en) | 2008-08-07 | 2008-08-07 | Electromagnetic brake sheet billet choanoid crystallizer continuous-cast device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200146677U CN201313158Y (en) | 2008-08-07 | 2008-08-07 | Electromagnetic brake sheet billet choanoid crystallizer continuous-cast device |
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| Publication Number | Publication Date |
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| CN201313158Y true CN201313158Y (en) | 2009-09-23 |
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| CNU2008200146677U Expired - Fee Related CN201313158Y (en) | 2008-08-07 | 2008-08-07 | Electromagnetic brake sheet billet choanoid crystallizer continuous-cast device |
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| CN (1) | CN201313158Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106493329A (en) * | 2016-11-18 | 2017-03-15 | 辽宁科技大学 | A kind of production method of efficient control continuous casting bleed-out and device |
| CN112236249A (en) * | 2018-06-07 | 2021-01-15 | 日本制铁株式会社 | Continuous casting equipment and continuous casting method used for casting thin slab of steel |
| RU2781932C1 (en) * | 2022-03-22 | 2022-10-21 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Комсомольский-на-Амуре государственный университет" (ФГБОУ ВО "КнАГУ") | Device for producing continuously cast deformed blanks |
-
2008
- 2008-08-07 CN CNU2008200146677U patent/CN201313158Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106493329A (en) * | 2016-11-18 | 2017-03-15 | 辽宁科技大学 | A kind of production method of efficient control continuous casting bleed-out and device |
| CN106493329B (en) * | 2016-11-18 | 2018-06-29 | 辽宁科技大学 | A kind of production method and device of efficient control continuous casting bleed-out |
| CN112236249A (en) * | 2018-06-07 | 2021-01-15 | 日本制铁株式会社 | Continuous casting equipment and continuous casting method used for casting thin slab of steel |
| CN112236249B (en) * | 2018-06-07 | 2022-08-02 | 日本制铁株式会社 | Continuous casting equipment and continuous casting method used for casting thin slab of steel |
| RU2781932C1 (en) * | 2022-03-22 | 2022-10-21 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Комсомольский-на-Амуре государственный университет" (ФГБОУ ВО "КнАГУ") | Device for producing continuously cast deformed blanks |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090923 Termination date: 20120807 |