CN219944552U - Device for actively controlling flow direction of molten steel at outlet of tundish passage in multi-mode manner - Google Patents
Device for actively controlling flow direction of molten steel at outlet of tundish passage in multi-mode manner Download PDFInfo
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- CN219944552U CN219944552U CN202321444505.8U CN202321444505U CN219944552U CN 219944552 U CN219944552 U CN 219944552U CN 202321444505 U CN202321444505 U CN 202321444505U CN 219944552 U CN219944552 U CN 219944552U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 69
- 239000010959 steel Substances 0.000 title claims abstract description 69
- 238000010438 heat treatment Methods 0.000 claims abstract description 136
- 230000006698 induction Effects 0.000 claims abstract description 41
- 238000004401 flow injection analysis Methods 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 29
- 238000005266 casting Methods 0.000 claims description 26
- 238000009749 continuous casting Methods 0.000 abstract description 6
- 239000000155 melt Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 10
- 239000011819 refractory material Substances 0.000 description 10
- 239000002893 slag Substances 0.000 description 6
- 238000012937 correction Methods 0.000 description 5
- 230000005674 electromagnetic induction Effects 0.000 description 5
- 230000001174 ascending effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009991 scouring Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010187 selection method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The utility model provides a device for actively controlling the flow direction of molten steel at an outlet of a tundish passage in a multi-mode, which belongs to the technical field of continuous casting tundish induction heating and comprises the following components: the channel type tundish body comprises a sprue chamber, a pouring chamber and at least two heating channels connected with the sprue chamber and the pouring chamber; the induction heating devices are respectively arranged on the heating channels and close to one side of the flow injection chamber; the multi-mode flow control device is arranged between the induction heating device and the pouring chamber and generates driving force perpendicular to the axis of the heating channel, and the heating channel is positioned at 1/4-2/5 of the cavity height of the pouring chamber. According to the utility model, the multimode flow control device is added at the outlet of the heating channel, so that not only can the accurate temperature compensation be performed on the molten steel, but also the main control on the direction of the molten steel flowing out of the heating channel can be realized.
Description
Technical Field
The utility model belongs to the technical field of continuous casting tundish induction heating, and particularly relates to a device for actively controlling the flow direction of molten steel at an outlet of a tundish passage in a multi-mode manner.
Background
The stable control of the temperature of molten steel in the continuous casting process of special steel is one of key parameters for ensuring the continuous casting yield and the casting blank quality, and the low superheat degree casting can realize high-drawing-speed production, improve the solidification structure of the casting blank, improve the service performance of subsequent steel and the like. The tundish is used as the last metallurgical vessel before molten steel solidification in the continuous casting process, and has important functions of starting up and down. In the continuous casting production process, the molten steel in the tundish inevitably has certain heat loss, particularly in the stages of initial pouring, ladle changing, final pouring and the like, and the temperature fluctuation of the molten steel in the tundish is larger, so that the constant-temperature constant-pull-rate casting process is not facilitated. The development and application of the induction heating tundish make it possible to precisely adjust the temperature of the tundish.
The channel type induction heating technology has the advantages of high heating efficiency, uniform heating, simple equipment, safe and reliable operation and the like, and therefore, the channel type induction heating technology is widely applied to various large steel plants. The structure of the tundish can be optimized before the induction heating tundish is put into production, and a flow control device with good molten steel flow characteristics is adopted, so that the average residence time of molten steel is further prolonged, and the removal efficiency of inclusions is improved. However, the addition of excessive flow control devices can increase the erosion probability of refractory materials, increase the risk of producing external nonmetallic inclusions, and the addition of excessive refractory materials can also bring about the problems of corresponding increase in cost, improvement in masonry difficulty, reduction in service life and the like.
Meanwhile, the positions of the heating channels are not in a general way due to the limitation of the tundish and the field space of different structures. According to the previous researches, the channel is placed too low and has strong descending flow, so that the channel can tell molten steel to wash out refractory materials at the bottom of a casting chamber, and the refractory materials of the whole working layer can be eroded when the molten steel is severe, so that the content of inclusions is greatly increased. The channel is placed too high and has strong upward flow, so that the liquid steel surface is exposed, the liquid steel is exposed in the air, the risk of secondary oxidization of the liquid steel is increased, meanwhile, the problems of slag winding and the like caused by too high liquid level flow speed can be solved, impurities are captured into the liquid steel, and the cleanliness of the liquid steel is affected. The flow direction of the molten steel at the outlet of the channel is shown in figure 1 when the channel is placed at a lower position under the condition of not starting heating; and under the condition of no heating, the flow direction of the molten steel at the outlet of the channel is shown in a schematic diagram in fig. 2 when the channel is placed higher. It can be seen that channel type induction heating can seriously affect the flow field of molten steel, so that more inclusions are caused in steel.
Therefore, a device for changing the flow state of molten steel at the outlet of a channel on the premise of not adding a flow control device of a refractory material is needed to be proposed.
Disclosure of Invention
In order to solve the problems, the utility model provides a device for actively controlling the flow direction of molten steel at the outlet of a tundish channel in a multi-mode manner, and the device can accurately compensate the temperature of the molten steel and realize the main control of the flow direction of the molten steel flowing out of the channel by adding a multi-mode flow control device at the outlet of the channel.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
in one aspect, the present utility model provides a device for actively controlling a flow direction of molten steel at an outlet of a tundish passage in a multi-mode, which is applied to passage type induction heating, and comprises: the channel type tundish body comprises a sprue chamber, a pouring chamber and at least two heating channels connected with the sprue chamber and the pouring chamber; the induction heating devices are respectively arranged on the heating channels and close to one side of the flow injection chamber; the multi-mode flow control device is arranged between the induction heating device and the pouring chamber and generates driving force perpendicular to the axis of the heating channel, and the heating channel is positioned at 1/4-2/5 of the cavity height of the pouring chamber.
Further, the angle of the heating channel is within + -8 DEG with respect to the horizontal plane.
Further, the induction heating device comprises a first annular iron core and a first electromagnetic coil wound on the first iron core, and the axis of the first iron core coincides with the axis of the heating channel.
Further, the multi-mode flow control device comprises a second iron core and a second electromagnetic coil wound on the second iron core, the axis of the second iron core is perpendicular to the heating channel, and the second electromagnetic coil winds around the axis of the second iron core.
Further, the height of the second iron core is larger than the outer diameter of the heating channel.
Furthermore, the two multi-mode flow control devices are in a group, the power-on directions are the same, and the two multi-mode flow control devices are respectively arranged on two sides of the heating channel.
Further, the cross section of the second iron core comprises a long side and a short side, and the included angle between the long side and the axis of the heating channel facing to one side of the pouring chamber is 30-60 degrees.
Further, the multi-mode flow control device is not more than 100mm away from the outer wall of the pouring chamber.
Further, the distance between the induction heating device and the multi-mode flow control device is not less than 2/5 of the length of the heating channel.
Further, the nearest distance between the multi-mode flow control device and the heating channel is 5-15mm.
The technical scheme provided by the embodiment of the utility model has the beneficial effects that: by adding the multi-mode flow control device, the flow direction of molten steel at the outlet of the channel can be actively controlled on the premise that a refractory material flow control device is not additionally added in a pouring area, and excessively strong descending flow can be changed into ascending flow under the working condition of starting induction heating, so that the ascending flow impacting the liquid level is controlled into horizontal flow, the liquid level flow velocity is reduced, and the risk of slag rolling is reduced. In general, the multi-mode flow control device greatly improves the refining function of the tundish, ensures that the flow direction of molten steel at the outlet of the channel is not limited by the installation position, and can be controlled artificially and actively.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the flow direction of molten steel at the outlet of a heating channel when the heating channel is placed lower under the condition of unopened heating in the prior art;
FIG. 2 is a schematic view of the flow direction of molten steel at the outlet of a heating channel when the heating channel is placed higher under the condition of unopened heating in the prior art;
FIG. 3 is a diagram of a device for actively controlling the flow direction of molten steel at the outlet of a tundish passage in a multimode manner, which is provided by the embodiment of the utility model;
FIG. 4 is a schematic structural diagram of a multi-mode flow control device according to an embodiment of the present utility model;
FIG. 5 is a schematic structural diagram of another arrangement mode of the multi-mode flow control device according to the embodiment of the present utility model;
FIG. 6 is a schematic view of the flow direction of molten steel at the outlet when the heating channel is positioned lower in the prior art;
FIG. 7 is a schematic view of the flow direction of molten steel at the outlet when the heating channel is set at a lower position according to the embodiment of the present utility model;
FIG. 8 is a schematic view of the flow direction of molten steel at the outlet when the heating channel is positioned higher in the prior art;
FIG. 9 is a schematic view of the flow direction of molten steel at the outlet when the heating channel is located at a higher position according to the embodiment of the present utility model.
Reference numerals: 1-an injection chamber; 2-a casting chamber; 3-heating channels; 4-pouring channels; 5-an induction heating device; 51-a first core; 52-a first electromagnetic coil; 6-a multi-mode flow control device; 61-a second core; 62-second electromagnetic coil.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present utility model, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
The utility model provides a device for actively controlling the flow direction of molten steel at the outlet of a tundish passage in a multi-mode, which is applied to passage type induction heating, as shown in figure 3, and comprises the following steps: a channel-type tundish body comprising a sprue chamber 1, a pouring chamber 2 and at least two heating channels 3 connecting the sprue chamber 1 and the pouring chamber 2; the induction heating devices 5 are respectively arranged on the heating channels 3 and close to one side of the flow injection chamber 1; the multi-mode flow control device 6 is arranged between the induction heating device and the pouring chamber, and generates driving force perpendicular to the axis of the heating channel, and the heating channel is positioned at 1/4-2/5 of the height of the cavity of the pouring chamber.
According to the utility model, by arranging the induction heating device 5 and the multi-mode flow control device 6, on one hand, the temperature of a melt is stabilized, and the quality of a steel billet is improved; secondly, through the multi-mode flow control device, the flow direction of molten steel at the outlet of the channel can be actively controlled on the premise that a refractory material flow control device is not additionally added in the pouring chamber, and a proper upward flow can be generated under the working condition that induction heating is not started, so that the contact probability of inclusions on a steel slag interface is increased, and the effect of the inclusions is improved; and under the working condition of starting induction heating, excessively strong descending flow can be changed into ascending flow, and the ascending flow impacting the liquid level is controlled into horizontal flow, so that the liquid level flow rate is reduced, and the risk of slag rolling is reduced.
The heating channel is positioned at 1/4-2/5 of the height of the cavity of the flow injection chamber. The position of the heating channel is limited to prevent the molten steel from scouring the bottom of the casting chamber in the casting process, and impurities are rolled up and conveyed into the distribution chamber through the induction heating channel, and the position of the heating channel, namely the intersection position of the axis of the heating channel and the cavity, is the reference.
The melt in the casting chamber 2 is cast via the casting channel 4 and can be set to one or more according to technical design, actual situation and technical requirements, which are not particularly limited here.
It is noted that the multi-mode flow control device of the present utility model applies a driving force perpendicular to the axis of the heating channel, in particular, an upward or downward driving force to the melt.
The induction heating device 5 adopts power frequency single-phase alternating current.
The angle of the heating channel is within + -8 DEG relative to the horizontal plane. The larger the inclination angle is, the larger the correction power required by the multi-mode flow control device 6 is, and even the larger correction power is caused by mass change, the main control on the direction of the molten steel flowing out of the channel cannot be realized, and mainly because the action area of the multi-mode flow control device 6 is limited, even if the multi-mode flow control device has a certain correction function, the main control on the direction of the molten steel flowing out cannot be realized when the multi-mode flow control device exceeds the limit range.
The induction heating device 5 comprises a first annular iron core 51 and a first electromagnetic coil 52 wound on the first iron core 51, the axis of the first iron core 51 coincides with the axis of the heating channel 3, and by the arrangement, the electric field and the magnetic field can be uniformly distributed on the section of the induction heating channel. In the embodiment of the utility model, two parallel induction heating channels are provided, the first electromagnetic coils 52 of the two electromagnetic induction heating devices are wound on the adjacent edges of the two first iron cores 51, and the two electromagnetic induction heating devices are located on the same plane, as shown in fig. 1, the adjacent edges of the two first iron cores 51 are respectively provided with the two first electromagnetic coils 52, the energizing directions of the two first electromagnetic coils 52 are the same, the directions of magnetic fields generated in the closed loop are the same and are mutually overlapped, the synergistic effect of the two induction heating devices 5 is improved, and the energizing directions are the same and can be understood as that the coils simultaneously generate upward or downward magnetic fields.
As shown in fig. 3-4, the multi-mode current control device 6 includes a second iron core 61 and a second electromagnetic coil 62 wound around the second iron core 61, wherein the axis of the second iron core 61 is perpendicular to the heating channel, and the second electromagnetic coil 62 is wound around the axis of the second iron core 61; the multi-mode current control device adopts three-phase low-frequency alternating current, and the current frequency is lower than 6Hz.
The height of the second iron core is larger than the outer diameter of the heating channel. This ensures that the magnetic field generated by the second core is able to generate a sufficient magnetic field for the heating channel 3.
It can be understood that the multi-mode flow control device 6 may be provided as one or two as shown in fig. 3, and two multi-mode flow control devices are symmetrically provided on two sides of a single heating channel 3, and in the embodiment of the present utility model, two multi-mode flow control devices 6 are provided for each single heating channel 3. When the multi-mode current controlling means 6 are provided in two, the second iron cores 61 of the multi-mode current controlling means 6 have the same magnetic field direction, i.e. an upward magnetic field or a downward magnetic field is simultaneously generated, and in order to achieve the above effect, the energizing directions of the second electromagnetic coils 62 of the multi-mode current controlling means 6 are the same, preferably, the multi-mode current controlling means 6 have the same physical structure.
As a preferred embodiment, as shown in fig. 5, the cross section of the second iron core includes a long side L and a short side S, and the included angle α between the long side and the axis of the heating channel facing the casting chamber is in the range of 30 ° to 60 °. The multi-mode flow control device is not more than 100mm away from the outer wall of the pouring chamber. On the one hand, the distance between the multi-mode control device 6 and the pouring chamber 2 is limited to be close enough, so that the magnetic field intensity is ensured, and on the other hand, the influence range of the magnetic field can be transferred to the inlet of the heating channel 3 through the arrangement, so that the scouring strength of the magnetic field generated by the multi-mode flow control device 6 to the upper and lower inner surfaces in the heating channel is prevented from being too high, and inclusions in molten steel are increased. The distance between the multi-mode flow control device 6 and the outer wall of the pouring chamber 2 is the shortest distance between the multi-mode flow control device 6 and the pouring chamber 2, as shown in fig. 5, and H is the distance between the multi-mode flow control device 6 and the pouring chamber 2.
The distance between the induction heating device 5 and the multi-mode flow control device 6 is not less than 2/5 of the length of the heating channel. The distance is the nearest distance between the electromagnetic induction heating device 5 and the multi-mode flow control device 6, and the electromagnetic induction heating device 4 and the electromagnetic speed reducing device 5 are prevented from being influenced by limiting the distance between the electromagnetic induction heating device 5 and the multi-mode flow control device.
In order to achieve a higher electromagnetic braking effect, the nearest distance from the multi-mode flow control device 6 to the heating channel 3 is 5-15mm.
Determining a mode of application of the multi-mode flow control device based on a vertical distance between the heating channel and a bottom of the casting chamber melt: if the heating channel is arranged at the upper half part of the pouring chamber, the multi-mode flow control device adopts a mode of generating downward electromagnetic force; if the heating channel is placed in the lower half of the pouring chamber, the multi-mode flow control device adopts a mode that generates upward electromagnetic force. With the above arrangement, slag is prevented from being curled by applying downward electromagnetic force to the melt when the heating channel is in the upper half of the casting chamber; when the heating channel is in the lower half of the casting chamber, a larger scouring action on the inner wall of the bottom of the casting chamber is prevented by applying upward electromagnetic force to the melt.
It should be noted that, for the "upper half" and "lower half" of the casting chamber, the upper half and the lower half provided in the embodiment of the present utility model are defined by a half of the height of the melt in the casting chamber, and may be considered as the upper half when the axis of the heating channel is located above the half of the height of the melt, and may be considered as the lower half when the axis is located below the half of the height of the melt.
Preferably, in order to better control the power of the multi-mode flow control device to achieve the optimal effect, the utility model divides the height area of the melt into three parts, and for the three parts, the power calculation formula of the multi-mode flow control device is as follows:
P mid ＝0-H 1 ≤ΔH≤H 1
ΔH＝H-H 0 /2
wherein P is up The heating channel is positioned at H 1 The power of the multi-mode flow control device at the above position; p (P) down The heating channel is located at-H 1 The power of the multi-mode flow control device at the following positions; p (P) mid Is positioned at-H for heating channel 1 And H is 1 The power of the multi-mode flow control device in the middle position; p (P) h Heating power for the induction heating device; lambda (lambda) 1 Is provided with a heating channel at H 1 The power correction coefficient at the above position is 2.5; lambda (lambda) 2 Is positioned at-H for heating channel 1 The power correction coefficient at the following position is 3.2; d is the diameter of the heating channel; d (D) 0 The diameter standard value of the heating channel is a certain value, and the value is 0.05m; beta is the inclination angle of the wall surface of the casting chamber close to the heating channel; h is the vertical distance between the heating channel and the bottom of the casting chamber melt; h 0 For vertical height of casting chamber meltA degree; d, d 1 The distance from the multi-mode flow control device to the axis of the heating channel; d, d 2 The distance between the multi-mode flow control device and the wall surface of the casting chamber close to the heating channel; d, d 0 The standard distance is a certain value, and the value is 0.08m.
It should be noted that, the above power is the total power of the multi-mode flow control device 6, and when one multi-mode flow control device is used to control the flow direction of the melt in the single heating channel, the calculation power is used to control the single multi-mode flow control device; when two multi-mode flow control devices are adopted as a group to be arranged at two sides of the heating channel to control the flow direction of the melt, the single multi-mode flow control device adopts half of the calculated power to control.
A control method of a device for actively controlling the flow direction of molten steel at the outlet of a tundish passage in a multi-mode comprises the following steps:
(1) And respectively constructing mathematical models of the channel type induction heating tundish under the working conditions of not starting heating and only starting heating, calculating a molten steel residence time distribution curve of the tundish, and simultaneously comparing and analyzing the removal condition of inclusions to finish structural design and preliminarily determining the relative positions of the heating channel and the pouring chamber.
(2) And finally determining the relative positions of the adopted channel and the casting chamber according to the actual space of on-site production, the masonry of refractory materials and the cost of the refractory materials.
(3) The induction heating device 5 does not need to be started at the initial stage of molten steel pouring or when the degree of superheat is high.
(4) As the casting process proceeds, the temperature of the molten steel decreases, the induction heating device 5 is turned on, and the multi-mode flow control device 6 is turned on at the same time.
Specifically, the foregoing power calculation formula is adopted to calculate the output power of the multi-mode flow control device 6 and control the multi-mode flow control device 6 based on the output power.
(5) At the end of the casting, when the level of the molten steel is below the channel, the induction heating device 5 is stopped and the multi-mode flow control device 6 is stopped.
In the step (4), the mode of the multi-mode flow control device 6 is selected, and the selection method is as follows: determining the mode applied by the multi-mode flow control device 6 according to the vertical height of the channel 3 and the pouring area 2 determined in the step (2), if the channel 3 is placed at the bottom or the lower half part of the pouring area, and when the induction heating device 5 is only started, the flow direction of molten steel at the outlet of the channel 3 is shown in fig. 6, the multi-mode flow control device 6 adopts a mode of generating upward electromagnetic force, and then the flow direction of molten steel at the outlet of the channel 3 is shown in fig. 7, more upward flows are provided in a controllable range, so that the contact probability of inclusions and steel slag interfaces can be increased, and the strong downward flow is prevented from scouring the refractory material at the bottom of the pouring area 2; if the channel 3 is placed at the upper half part of the pouring area 2, when the induction heating device 5 is only started, the flow direction of molten steel at the outlet of the channel 3 is shown in fig. 8, the multi-mode flow control device 6 adopts a mode of generating downward electromagnetic force, and then the flow direction of molten steel at the outlet of the channel 3 is shown in fig. 9, so that the flow direction of molten steel at the outlet of the channel 3 can be actively changed, strong upward flow is controlled to be horizontal flow, the risk of secondary oxidation caused by the naked molten steel is avoided, and the refining function of the tundish is further improved.
The above description is only an example of the present utility model and is not intended to limit the scope of the present utility model, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A device for actively controlling the flow direction of molten steel at an outlet of a channel of a tundish in a multi-mode manner, which is characterized by being applied to channel type induction heating and comprising:
the channel type tundish body comprises a sprue chamber, a pouring chamber and at least two heating channels connected with the sprue chamber and the pouring chamber;
the induction heating devices are respectively arranged on the heating channels and close to one side of the flow injection chamber;
the multi-mode flow control device is arranged between the induction heating device and the pouring chamber and generates driving force perpendicular to the axis of the heating channel, and the heating channel is positioned at 1/4-2/5 of the cavity height of the pouring chamber.
2. A device for actively controlling the flow direction of molten steel at the outlet of a tundish passage according to claim 1 in which the angle of said heating passage is in the range of + -8 deg. with respect to the horizontal plane.
3. The apparatus for actively controlling the flow direction of molten steel at the outlet of a tundish passage according to claim 2, wherein said induction heating apparatus comprises a first iron core having a ring shape and a first electromagnetic coil wound around said first iron core, and an axis of said first iron core coincides with an axis of said heating passage.
4. A device for actively controlling the flow direction of molten steel at the outlet of a tundish passage according to claim 3, wherein said multimode flow control device comprises a second iron core and a second electromagnetic coil wound around said second iron core, the axis of said second iron core being perpendicular to said heating passage, said second electromagnetic coil being wound around the axis of said second iron core.
5. The apparatus for actively controlling the flow direction of molten steel at the outlet of a tundish passage according to claim 4, wherein the height of said second iron core is greater than the outer diameter of said heating passage.
6. The device for actively controlling the flow direction of molten steel at the outlet of a tundish passage according to claim 5, wherein two of the multimode flow control devices are a group, and the current-carrying directions are the same and are respectively arranged at two sides of the heating passage.
7. The apparatus according to claim 6, wherein the second core comprises a cross section having a long side and a short side, and the angle between the long side and the axis of the heating channel on the side facing the casting chamber is in the range of 30-60 °.
8. The apparatus for actively controlling the flow direction of molten steel at the outlet of a tundish passage according to claim 7, wherein said multi-mode flow control device is not more than 100mm from the outer wall of the casting chamber.
9. The apparatus for actively controlling the flow direction of molten steel at the outlet of a tundish passage according to claim 8, wherein the distance between said induction heating apparatus and said multi-mode flow control apparatus is not less than 2/5 of the length of said heating passage.
10. The apparatus for actively controlling the flow direction of molten steel at the outlet of a tundish passage according to claim 9, wherein the nearest distance of the multimode flow control device from the heating passage is 5-15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321444505.8U CN219944552U (en) | 2023-06-07 | 2023-06-07 | Device for actively controlling flow direction of molten steel at outlet of tundish passage in multi-mode manner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321444505.8U CN219944552U (en) | 2023-06-07 | 2023-06-07 | Device for actively controlling flow direction of molten steel at outlet of tundish passage in multi-mode manner |
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| Publication Number | Publication Date |
|---|---|
| CN219944552U true CN219944552U (en) | 2023-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202321444505.8U Active CN219944552U (en) | 2023-06-07 | 2023-06-07 | Device for actively controlling flow direction of molten steel at outlet of tundish passage in multi-mode manner |
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| Country | Link |
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| CN (1) | CN219944552U (en) |
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2023
- 2023-06-07 CN CN202321444505.8U patent/CN219944552U/en active Active
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