CN103480832A - Tundish induction heating device - Google Patents
Tundish induction heating device Download PDFInfo
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- CN103480832A CN103480832A CN201310479068.8A CN201310479068A CN103480832A CN 103480832 A CN103480832 A CN 103480832A CN 201310479068 A CN201310479068 A CN 201310479068A CN 103480832 A CN103480832 A CN 103480832A
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- tundish
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- heel piece
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Abstract
The invention relates to a tundish induction heating device which comprises at least one induction heater which is arranged outside a tundish and corresponds to a part between a steel receiving cavity and a steel pouring cavity of the tundish. Two end surfaces of a gap of a magnetic conducting yoke are respectively located at the two sides of a shell of the tundish; the connection line of the two end surfaces of the gap of the magnetic conducting yoke penetrates through a non-magnetic material board, a fireproofing material and molten steel on the shell surface of the tundish; at least one induction coil is arranged outside the magnetic conducting yoke in a sleeved manner; a power supply provides alternating current for the induction coil. By adoption of the tundish induction heating device with the structure, the flowing-in and flowing-out distances in the tundish and the interior structure of the tundish do not need to be changed; the tundish induction heating device can be used for heating of a tundish of a new continuous casting machine and transformation of a tundish of an old continuous casting machine, is suitable for a single-flow continuous casting tundish, a double-flow continuous casting tundish and a multi-flow continuous casting tundish, does not influence the flow field mode of molten steel, and can also promote the upward floating of inclusions in molten steel; the magnetic conducting yoke is arranged outside the tundish, so a blast cooling system of an iron core can be omitted.
Description
Technical field
The present invention relates to the induction heating equipment technical field, specifically refer to a kind of tundish induction heating apparatus.
Background technology
At the initial stage of continuous casting steel machine technical development, tundish is just used as storage and the distribution of molten steel.Along with the development of continuous casting technology and improving constantly that slab quality is required, steel quality is familiar with by people gradually to the significance of continuous casting process.For direct motion and the sequence casting that guarantees continuous casting working procedure, must guarantee that molten steel has enough degrees of purity, the composition range of molten steel be as far as possible accurately controlled, and stable liquid steel temperature and the degree of superheat will be within the sufficiently long time, kept.Therefore, as last the refractory material container in the smelting process of steel, and be to be turned to the linking point of continued operation by intermittently operated, the effect of tundish is very important.It the more important thing is the floating eliminating of stable liquid steel temperature and the degree of superheat, promotion field trash and the important function of pure molten steel except stablizing beam, realizing sequence casting.
In direct casting is produced, the degree of superheat of molten steel in tundish (actual cast temperature and molten steel liquidus temperature poor) has a huge impact slab quality.If the degree of superheat of molten steel is too high, the center segregation of strand will increase the weight of.On the contrary, if the degree of superheat of molten steel is too low, the viscosity of molten steel raises, and the defect that field trash causes will increase.Therefore, for defects such as the segregation in elimination simultaneously or minimizing continuous casting billet and field trashes, the liquid steel temperature in tundish must be controlled in very narrow scope.But, due in casting cycle, the heat radiation of large bag and tundish certainly exists, so the liquid steel temperature in tundish totally descends gradually.
In these cases, in order to make the degree of superheat of liquid steel temperature in tundish, maintain in a suitable scope, need to set up heating function to tundish, carry out supplementing of heat.Current way is that tundish is set up plasma heating device or induction heating apparatus.Due to unfavorable factors such as the equipment requirement of plasma heating device are high, maintenance difficulties is large, heat is too assembled, noise is large, therefore induction heating apparatus uses more in recent years.
The tundish channel type induction heating apparatus of progressively applying has in recent years been realized the tundish temperature compensate function and has been had the part removal function of field trash.The basic principle of its eddy-current heating is shown in as Fig. 1.In actual applications, the channel-type induction heating apparatus is that partition wall by being made by refractory material is separated into tundish flood chamber and waters the steel chamber.Induction heater is installed on the inner up/down perforation of partition wall ground at refractory material, in the close tundish of the side of induction heater bottom, the ladle canal that connects two chambers is set, and specifically refers to Fig. 2.
As shown in Figure 3, the T-shaped tundish channel type induction heating apparatus of traditional arrangement, induction coil layout is subject between steel chamber and trough casting chamber in reception large Baogang water, induction coil is arranged along large bag long nozzle (tundish becomes a mandarin) casting direction center line, the induction channels of induction coil both sides is vertical with the tundish major axis, between the large water-coating port of this arrangement requirement conticaster (tundish becomes a mandarin) and middle water containing opening (going out stream) center line, centre-to-centre spacing must be enough large, to guarantee the installing space of enough induction coils, enough left induction channels and the length of induction channels, enough refractory thickness.The arrangement of this tundish induction heating apparatus, for newly-built conticaster, as long as consider that in the design phase in early stage of engineering large water-coating port is subject to the distance between steel device and middle water containing opening (going out stream) center line, but, to the transformation of built continuous casting tundish, increase eddy-current heating and just have the problem that how to add inductor.
For the technology innovation project of old factory, the distance of wrapping greatly between long nozzle (tundish becomes a mandarin) and middle water containing opening (going out stream) center line can't lengthen.Even lengthen, the workload of transformation is large, investment is large and impact is produced.For this reason, there is patent to propose a side of the large bag long nozzle in tundish induction coil and channel arrangement.See Fig. 4.Although the transformation of this tundish can realize induction heating function, but tundish needs redesign, and the flow fields pattern of molten steel also inevitably has been subject to destruction in tundish, to the eliminating of foreign substance in molten steel in tundish, the aspects such as uniformity that respectively go out to flow temperature, all will be affected.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art, provide a kind of and be applicable to new, the newly-increased molten steel heater of old continuous casting tundish and transform, do not affect the Metal in Tundish flow fields pattern, can cancel the air-blast cooling system to iron core, adaptable tundish induction heating apparatus.
For realizing above-mentioned purpose, tundish induction heating apparatus of the present invention by the following technical solutions:
This tundish induction heating apparatus, its main feature is, at least one induction heater is arranged at the outside of tundish, and this induction heater is corresponding to the position between He Jiaogang chamber, steel chamber that is subject to of described tundish, described induction heater comprises magnetic conduction heel piece, this magnetic conduction heel piece is the annular core with a breach, the both ends of the surface of the breach of described magnetic conduction heel piece lay respectively at the both sides of the housing of described tundish, the line of the both ends of the surface of the breach of described magnetic conduction heel piece is through the non-magnetic material plate of the surface of shell of described tundish, refractory material and molten steel, at least one induction coil is sheathed on two columns or bottom water flat-topped ridge of described magnetic conduction heel piece, described induction coil provides alternating current by power supply, thereby generation alternating magnetic field.
The surface of the housing of the tundish in this tundish induction heating apparatus part corresponding with described magnetic conduction heel piece is provided with the non-magnetic material plate, and described non-magnetic material plate is corresponding with two end faces of the breach of described magnetic conduction heel piece respectively.
The both ends of the surface of the breach of the magnetic conduction heel piece in this tundish induction heating apparatus all are fixedly installed poly-magnetic head.
Magnetic conduction heel piece in this tundish induction heating apparatus is arranged at bottom or the sidepiece of described tundish.
Magnetic conduction heel piece in this tundish induction heating apparatus is made by silicon steel thin belt or silicon steel sheet.
Induction coil in this tundish induction heating apparatus is water-cooled copper, and the inside water flowing of this induction coil is cooling.
Non-magnetic material plate in this tundish induction heating apparatus is nonmagnetic steel plate or nonmetallic materials.
It between non-magnetic material steel plate in this tundish induction heating apparatus and the housing of tundish, is the insulation connected mode; Perhaps the housing of described non-magnetic material steel plate and described tundish is the conducting connected mode.
Adopt the tundish induction heating apparatus of this structure, both can realize not changing in tundish and become a mandarin and go out to flow distance, can realize again not changing the tundish internal structure; Both can be used for the tundish heating of newly-built conticaster, the eddy-current heating of tundish while also can be used for reforming continuous casting machine, be applicable to single current continuous casting tundish and double fluid and multi-strand continuous casting tundish, the flow fields pattern that strong adaptability, transformation amount be little, do not affect molten steel in tundish, can cancel the air-blast cooling system to iron core.The present invention has the advantages such as enforcement is simple, safe and reliable, plant maintenance is convenient, also can further promote the inclusion content in melting steel floating during heating.
The accompanying drawing explanation
The schematic diagram that Fig. 1 to Fig. 4 is existing induction heating apparatus.
The schematic diagram that Fig. 5 is the induction heating apparatus in embodiments of the invention one.
The schematic diagram that Fig. 6 is the induction heating apparatus in embodiments of the invention two.
The schematic diagram that Fig. 7 is the induction heating apparatus in embodiments of the invention three.
The schematic diagram that Fig. 8 is iron core of the present invention.
Number in the figure is described as follows:
The housing of 1 tundish
2 refractory materials
3 molten steel
4 dams (slag weir)
5 large bag long nozzles
6 non-magnetic material plates
7 magnetic conduction heel pieces
8 induction coils
9 poly-magnetic heads
10 are subject to the steel chamber
11 water the steel chamber
12 middle water containing openings
The specific embodiment
In order more clearly to understand technology contents of the present invention, especially exemplified by following examples, describe in detail.
This tundish induction heating apparatus can be heated molten steel, also can be heated other metal objects, in this device, at least one induction heater is arranged at the outside of tundish, the quantity of eddy-current heating implement body can change according to the actual conditions such as shape and size of tundish, and this induction heater is subject to steel chamber 10 and waters the position between steel chamber 11 corresponding to tundish, induction heater comprises magnetic conduction heel piece 7, this magnetic conduction heel piece 7 is for having the annular core of a breach, it can be rectangle, elliptical ring or annular, the both ends of the surface of the breach of magnetic conduction heel piece 7 lay respectively at the both sides of tundish, the line of the both ends of the surface of the breach of magnetic conduction heel piece 7 is through the housing 1 of tundish, refractory material 2 and molten steel 3(refractory material 2 are coated on the surface of the housing 1 of tundish), at least one induction coil 8 is sheathed on outside magnetic conduction heel piece 7, induction coil 8 can be sheathed on the diverse location of magnetic conduction heel piece 7, induction coil 8 adopts the type of cooling of inner water flowing, or section is undertaken cooling by other cooling medium within it.Large bag long nozzle 5 is connected with being subject to steel chamber 10, waters steel chamber 11 and is connected with middle water containing opening 12.Dam (slag weir) 4 is arranged in tundish, and this dam (slag weir) 4 is positioned at the inside of tundish, be subject to steel chamber 10 by dam (slag weir) 4 with water steel chamber 11 and separate, be subject to steel chamber 10 and water steel chamber 11 and be connected.
The position corresponding with the breach of magnetic conduction heel piece 7 end faces, the surface of the housing 1 of tundish is fixedly installed non-magnetic material plate 6, the outer surface position of the housing 1 of tundish that can be corresponding at the end face with magnetic conduction heel piece 7 hollows out out the window of definite shape, embed non-magnetic material plate 6 in this window, non-magnetic material plate 6 is corresponding with the both ends of the surface of magnetic conduction heel piece 7 respectively, and the both ends of the surface of magnetic conduction heel piece 7 are parallel with corresponding non-magnetic material plate; The both ends of the surface of magnetic conduction heel piece 7 can arrange poly-magnetic head 9, also poly-magnetic head can be set.Induction heater can be arranged at bottom or the sidepiece of tundish;
Magnetic conduction heel piece 7 comprises silicon steel sheet, this silicon steel sheet through stacked, compacting, fix and form iron core 7, the thickness of silicon steel sheet, between 0.05～1.5 millimeter, has coatings between the aspect of silicon steel sheet, its width is adjusted according to the magnetic flux size; Induction coil 8 is copper tube, can adopt water-cooled or other cooling medium to carry out cooling to coil.
Embodiment mono-:
Refer to Fig. 5, this tundish is T-shaped.Single induction heater is placed on the outside of the housing 1 of tundish, adopt the bottom mounting means, magnetic conduction heel piece 7 silicon steel sheets in induction heater build up, the end face of magnetic conduction heel piece 7 does not all arrange poly-magnetic head 9, induction heater adopts the power supply form of twin coil, induction coil 8 water flowings are cooling, adopt the intermediate frequency power supply power supply, and the iron core blast cooling device is not set.Non-magnetic material plate 6 is fixed in the surface of the housing 1 of tundish, and is parallel to each other with two end faces of magnetic conduction heel piece 7.
Embodiment bis-:
Refer to Fig. 6, being subject to steel chamber 10 and watering the correspondence position of the outside between steel chamber 11 at tundish, place induction heater, induction heater is portal structures, by silicon steel sheet, is built up, and the both ends of the surface of magnetic conduction heel piece 7 are provided with poly-magnetic head 9, induction heater adopts the power supply form of twin coil, induction coil 8 water flowings are cooling, adopt the power frequency supply power supply, and the iron core blast cooling device is not set on magnetic conduction heel piece 7.Non-magnetic material plate 6 is concordant with the outer surface of the housing 1 of tundish, and the both ends of the surface of magnetic conduction heel piece 7 are identical with the angle of non-magnetic material plate 6.
Embodiment tri-:
Refer to Fig. 7, be subject to the middle part of steel chamber 10 at tundish, two are watered steel chamber 11 and lay respectively at two sides that are subject to steel chamber 10.In two sides that are subject to steel chamber 10 and two outsides of watering the housing 1 of the tundish between steel chamber 11, each places an induction heater, two induction heaters are portal structures, silicon steel sheet builds up, the both ends of the surface of magnetic conduction heel piece 7 all do not arrange poly-magnetic head 9, induction heater adopts the power supply form of twin coil, and induction coil 8 water flowings are cooling, adopts the intermediate frequency power supply power supply.The iron core blast cooling device is not set, and the both ends of the surface of magnetic conduction heel piece 7 are parallel to each other, and are parallel to nonmagnetic steel plate 6.
While needing heating, in induction coil 8, pass into alternating current, thereby, at the inner alternating magnetic fields that form of magnetic conduction heel piece 7, also in the two end faces of the breach of magnetic conduction heel piece 7, form alternating magnetic field simultaneously, with molten steel, form magnetic loop.The molten steel 3 of the two end faces of the breach of magnetic conduction heel piece 7 produces the induced-current of alternation under the effect of alternating magnetic field, thereby forms the Joule heat of inducting, and finally converts electric energy to heat energy, has realized the purpose to molten steel 3 heating.Adopt the method to be heated the molten steel 3 in tundish, the flow field of molten steel 3 in former tundish do not impacted.Flow control effect by dam in tundish (slag weir) 4, and under the acting in conjunction of rear molten steel 3 heat buoyancies of heating, can further promote the floating of non-metallic inclusion in the interior molten steel 3 of tundish, increase the time of staying of molten steel 3 in tundish, the degree of purity of molten steel 3 is further enhanced.
Adopt the tundish induction heating apparatus of this structure, both can realize not changing in tundish and become a mandarin and go out to flow distance, can realize again not changing the tundish internal structure; Both can be used for the tundish heating of newly-built conticaster, the eddy-current heating of tundish while also can be used for reforming continuous casting machine, be applicable to single current continuous casting tundish and double fluid and multi-strand continuous casting tundish, the flow fields pattern that strong adaptability, transformation amount be little, do not affect molten steel in tundish, can cancel the air-blast cooling system to iron core.The present invention has the advantages such as enforcement is simple, safe and reliable, plant maintenance is convenient, can further promote the inclusion content in melting steel floating during heating.
In this specification, the present invention is described with reference to its specific embodiment.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (8)
1. a tundish induction heating apparatus, it is characterized in that, at least one induction heater is arranged at the outside of tundish, and this induction heater is corresponding to the position between He Jiaogang chamber, steel chamber that is subject to of described tundish, described induction heater comprises magnetic conduction heel piece, this magnetic conduction heel piece is the annular core with a breach, the both ends of the surface of the breach of described magnetic conduction heel piece lay respectively at the both sides of the housing of described tundish, the line of the both ends of the surface of the breach of described magnetic conduction heel piece is through the non-magnetic material plate of the surface of shell of described tundish, refractory material and molten steel, at least one induction coil is sheathed on two columns or bottom water flat-topped ridge of described magnetic conduction heel piece, described induction coil provides alternating current by power supply, thereby generation alternating magnetic field.
2. tundish induction heating apparatus according to claim 1, it is characterized in that, the surface of the housing of the described tundish part corresponding with described magnetic conduction heel piece is provided with the non-magnetic material plate, and described non-magnetic material plate is corresponding with two end faces of the breach of described magnetic conduction heel piece respectively.
3. tundish induction heating apparatus according to claim 1, is characterized in that, the both ends of the surface of the breach of described magnetic conduction heel piece all are fixedly installed poly-magnetic head.
4. tundish induction heating apparatus according to claim 1, is characterized in that, described magnetic conduction heel piece is arranged at bottom or the sidepiece of described tundish.
5. tundish induction heating apparatus according to claim 1, is characterized in that, described magnetic conduction heel piece is made by silicon steel thin belt or silicon steel sheet.
6. tundish induction heating apparatus according to claim 1, is characterized in that, described induction coil is water-cooled copper, and the inside water flowing of this induction coil is cooling.
7. tundish induction heating apparatus according to claim 2, is characterized in that, described non-magnetic material plate is nonmagnetic steel plate or nonmetallic materials.
8. tundish induction heating apparatus according to claim 7, is characterized in that, between the housing of described non-magnetic material steel plate and tundish, is the insulation connected mode; Perhaps the housing of described non-magnetic material steel plate and described tundish is the conducting connected mode.
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| CN201310479068.8A CN103480832B (en) | 2013-10-14 | 2013-10-14 | Tundish induction heating device |
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| CN201310479068.8A CN103480832B (en) | 2013-10-14 | 2013-10-14 | Tundish induction heating device |
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| CN103480832A true CN103480832A (en) | 2014-01-01 |
| CN103480832B CN103480832B (en) | 2015-07-22 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105149560A (en) * | 2015-10-23 | 2015-12-16 | 东北大学 | Tundish induction heating device having function of removing occluded foreign substances |
| CN105665670A (en) * | 2016-01-27 | 2016-06-15 | 东北大学 | Side-wall type tundish induction heating and mixing technical method |
| CN107511474A (en) * | 2017-08-04 | 2017-12-26 | 福建圣力智能工业科技股份有限公司 | A kind of conticaster heating arrangements |
| CN108339969A (en) * | 2017-04-14 | 2018-07-31 | 上海新研工业设备股份有限公司 | Separate type groove inductor |
| CN111025204A (en) * | 2018-10-09 | 2020-04-17 | 宝钢特钢有限公司 | Magnetic field measuring device and method for electromagnetic tundish |
| CN112371969A (en) * | 2020-10-20 | 2021-02-19 | 青岛正望钢水控制股份有限公司 | Implementation method of functional refractory material of channel type electromagnetic induction heating tundish |
| CN114734005A (en) * | 2022-03-22 | 2022-07-12 | 安徽工业大学 | Electromagnetic braking device and method for controlling molten steel flow in tundish |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105149560A (en) * | 2015-10-23 | 2015-12-16 | 东北大学 | Tundish induction heating device having function of removing occluded foreign substances |
| CN105665670A (en) * | 2016-01-27 | 2016-06-15 | 东北大学 | Side-wall type tundish induction heating and mixing technical method |
| CN108339969A (en) * | 2017-04-14 | 2018-07-31 | 上海新研工业设备股份有限公司 | Separate type groove inductor |
| CN107511474A (en) * | 2017-08-04 | 2017-12-26 | 福建圣力智能工业科技股份有限公司 | A kind of conticaster heating arrangements |
| CN111025204A (en) * | 2018-10-09 | 2020-04-17 | 宝钢特钢有限公司 | Magnetic field measuring device and method for electromagnetic tundish |
| CN111025204B (en) * | 2018-10-09 | 2021-11-12 | 宝武特种冶金有限公司 | Magnetic field measuring device and method for electromagnetic tundish |
| CN112371969A (en) * | 2020-10-20 | 2021-02-19 | 青岛正望钢水控制股份有限公司 | Implementation method of functional refractory material of channel type electromagnetic induction heating tundish |
| CN112371969B (en) * | 2020-10-20 | 2021-09-24 | 青岛正望钢水控制股份有限公司 | Implementation method of functional refractory material of channel type electromagnetic induction heating tundish |
| CN114734005A (en) * | 2022-03-22 | 2022-07-12 | 安徽工业大学 | Electromagnetic braking device and method for controlling molten steel flow in tundish |
| CN114734005B (en) * | 2022-03-22 | 2024-01-26 | 安徽工业大学 | Electromagnetic braking device and method for controlling molten steel flow in tundish |
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