CN114101650A - Channel type induction heating device and tundish - Google Patents
Channel type induction heating device and tundish Download PDFInfo
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- CN114101650A CN114101650A CN202111425293.4A CN202111425293A CN114101650A CN 114101650 A CN114101650 A CN 114101650A CN 202111425293 A CN202111425293 A CN 202111425293A CN 114101650 A CN114101650 A CN 114101650A
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- China
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- channel
- induction heating
- heating device
- tundish
- steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
- B22D41/01—Heating means
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- General Induction Heating (AREA)
Abstract
The invention discloses a channel type induction heating device and a tundish, comprising: the steel bearing chamber, the steel casting chamber, the channel and the heating device; one end of the channel is connected and communicated with the steel bearing chamber, the other end of the channel is connected and communicated with the steel casting chamber, and the heating device is arranged on the channel; the invention has the functions of compensating the temperature drop of the molten steel and removing inclusions.
Description
Technical Field
The invention relates to the technical field of induction heating equipment, in particular to a channel type induction heating device and a tundish.
Background
At present, in the early stages of the development of continuous casting technology, the tundish is used only as a storage and distribution means for molten steel. With the development of continuous casting technology and the continuous improvement of the requirements on the quality of casting blanks, the important significance of the quality of molten steel on the continuous casting process is gradually known. In order to ensure smooth and multi-shot continuous casting in the continuous casting process, it is necessary to ensure sufficient purity of molten steel, to control the composition range of molten steel as precisely as possible, and to maintain stable molten steel temperature and superheat for a sufficient period of time. The function of the tundish, therefore, as the last refractory vessel in the steel smelting process, and also as the junction point for the transition from batch operation to continuous operation, is not negligible.
However, as metallurgical technology develops, the requirements of technicians on the tundish are higher and higher. In the continuous casting process, the temperature fluctuation of molten steel in the tundish sometimes reaches about 30 ℃, which is not beneficial to constant-temperature casting and constant-pulling-speed processes, and even more influences the internal quality of a casting blank. Therefore, it has been one of the hot issues of the metallurgist's research to seek to maintain the constant temperature of the tundish outlet by an external heat source. The traditional heating mode mainly adopts double-channel electromagnetic induction heating, and the induction heating effect can be achieved only by enabling induction current to form backflow.
Meanwhile, in the preparation process of molten steel, the molten steel contains deoxidation products and mechanically involved inclusions to different degrees, and the inclusions have serious influence on the quality and performance of a casting blank. At present, the distance between the outlet of the double-channel induction heating tundish channel researched by metallurgy workers and the water outlet is small, the residence time of molten steel in the tundish is short, and the full floating and collision polymerization of inclusions are not facilitated.
Therefore, how to provide an induction heating device capable of solving the above problems is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the invention provides a channel type induction heating device and a tundish, which can compensate the temperature drop of molten steel and remove inclusions.
In order to achieve the purpose, the invention adopts the following technical scheme:
a channel induction heating unit comprising: the steel bearing chamber, the steel casting chamber, the channel and the heating device;
one end of the channel is connected and communicated with the steel bearing chamber, the other end of the channel is connected and communicated with the steel casting chamber, and the heating device is arranged on the channel.
The beneficial effect who adopts above-mentioned device does: compared with the traditional double-channel induction heating, the heating device heats the molten steel by adopting an electromagnetic induction heating principle, and can enable the induced current to form a loop in the molten steel without specially arranging double channels so as to realize the heating of the molten steel.
Preferably, the channel is rectangular, the heating channel is rectangular, one end of the heating channel is connected with the steel bearing chamber, the other end of the heating channel is connected with the steel casting chamber, molten steel flows through the channel, the specific surface area of the channel is increased, and the increase of the adsorption of the wall surface to the impurities is facilitated.
Preferably, the heating device includes: the iron core is an annular iron core with a notch, the coil is sleeved on the iron core, and two end faces of the notch of the iron core are respectively located on two sides of the channel.
Adopt above-mentioned heating device's beneficial effect to do: the electromagnetic induction principle is utilized to heat the molten steel, and the induced current can form a loop in the molten steel without specially arranging two channels to further heat the molten steel, so that the heating efficiency is high.
Preferably, the length of the iron core along the channel is 1/3-2/3 of the length of the channel, the width of the cross section of the gap of the iron core is adapted to the width of the channel, if the width is too short, the heating effect is not obvious, and if the width is too long, the cost is easily increased.
Preferably, the method further comprises the following steps: the long water gap and the water outlet are arranged at the bottom of the steel casting chamber, and the water outlet can be arranged as an eccentric outlet, so that the residence time of the molten steel in the tundish can be increased.
Further, the invention also provides a tundish, which applies any one of the channel type induction heating devices.
Through the technical scheme, compared with the prior art, the invention discloses and provides the channel type induction heating device and the tundish, and the channel type induction heating device and the tundish have the following beneficial effects:
(1) the channel is an induction heating channel, the specific surface area of the channel is increased, and the adsorption of the wall surface to the impurities is favorably increased; in addition, the channel is flat and rectangular, so that the distance from nonmetallic inclusions in molten steel to the wall surface is shortened, and the removal of impurities is facilitated;
(2) the electromagnetic induction heating principle is adopted to heat the molten steel, but compared with the traditional induction heating principle, the induction current can form a loop in the molten steel without specially arranging a double channel so as to generate Joule heat and heat the molten steel, the annular iron core with the notch and the molten steel in the channel form a magnetic loop together, the changed magnetic field induces the induction current in the molten steel, and the generated Joule heat is completely used for heating the molten steel due to the resistance of the molten steel, so that the heating efficiency is high;
(3) the heating device adopted by the invention is an annular iron core and a coil with a notch, the notch of the iron core is determined by the thickness of the rectangular channel, the rectangular channel is set to be a flat channel and is not suitable to be too thick, the notch of the iron core is clamped on the upper surface and the lower surface of the channel, the magnetic leakage is less, and the heating efficiency is high; and compare in traditional heating device, simple structure easily installs.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a channel type induction heating apparatus provided in the present invention;
FIG. 2 is a schematic structural diagram of an induction heating apparatus according to the present invention;
FIG. 3 is a schematic structural diagram of a tundish provided by the present invention;
FIG. 4 is a graph of the outlet temperature of a conventional dual channel induction heating, rectangular channel induction heating, and coreless induction heating tundish at the same power as provided by the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, an embodiment of the present invention provides a channel type induction heating apparatus, including: the steel bearing chamber 1, the steel casting chamber 2, the channel 3 and the heating device 4;
one end of the channel 3 is connected and communicated with the steel bearing chamber 1, the other end of the channel is connected and communicated with the steel casting chamber 2, and the heating device 4 is arranged on the channel 3.
The position of the channel 3 can be adjusted according to field conditions, the channel can have a certain inclination angle, and the length-width ratio of the rectangular channel can also be flexibly adjusted.
In a specific embodiment, the channel 3 is a rectangular channel, which is flat.
In a particular embodiment, the heating means 4 comprise: the iron core 41 and the coil 42 are provided,
the iron core 41 is an annular iron core with a gap, the coil 42 is sleeved on the iron core 41, two end faces of the gap of the iron core 41 are respectively located at two sides of the channel 3, and a cooling channel (air cooling or water cooling) can be arranged around the coil 42.
In a specific embodiment, the length of the iron core 41 along the channel 3 accounts for 1/3-2/3 of the length of the channel 3, and the width of the cross section of the gap of the iron core 41 is adapted to the width of the channel 3 and can be flexibly adjusted on site.
Specifically, iron core 41's concrete structure can be for having the annular iron core of breach, coil 42 is established to one side cover, the opposite side has the breach, the breach just blocks on passageway 3 surface from top to bottom, coil 42 lets in the alternating current, the inside induced magnetic field that produces of iron core 41, the annular iron core 41 of taking the breach constitutes magnetic circuit with the molten steel that passes in the passageway 3 of breach jointly, the induced-current is formed in the molten steel in the magnetic field of change, because molten steel self has resistance, thereby play the induction heating effect to the molten steel, heating efficiency is higher.
In a specific embodiment, the method further comprises the following steps: the long nozzle 5 is arranged on the steel bearing chamber 1, and the water outlet 6 is arranged at the bottom of the steel casting chamber 2.
Further, an embodiment of the present invention further provides a tundish, wherein the channel type induction heating apparatus in any one of the above embodiments is applied.
When the device is used, molten steel enters the steel bearing chamber 2 from the long nozzle 1, flows through the rectangular channel 3 for heating, then flows into the steel casting chamber 6, and finally flows out of the tundish from the water outlet 7 and enters the crystallizer after reaching a certain temperature.
The invention is different from the traditional double-channel induction heating tundish, the position of the rectangular channel 3 can be adjusted according to the specific process, the embodiment of the invention adopts the rectangular single channel, namely the channel is not distributed on the central line of the steel bearing chamber 2 and the steel casting chamber 6, the distance between the outlet of the channel and the water outlet 7 is increased, the invention is beneficial to reducing short-circuit flow, the retention time of the molten steel in the tundish is increased, and the inclusion in the molten steel is convenient to be fully collided, floated and removed.
The channel 3 is distributed by adopting side channels, namely the channels are not distributed on the central lines of the steel bearing chamber 1 and the steel casting chamber 2, the distance between the channel outlet and the water outlet 6 is increased, the short-circuit flow is favorably reduced, the retention time of the molten steel in the tundish is increased, and the impurities in the molten steel are favorably fully collided, floated and removed.
Referring to fig. 4, a graph of the change of the outlet temperature of the conventional dual-channel induction heating tundish and coreless induction heating and the heating device provided by the present invention is shown, and it can be seen from the graph that the heating efficiency is higher by using the method of the present invention compared with the coreless induction heating method, and the device structure is simpler.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A channel induction heating unit, comprising: a steel bearing chamber (1), a steel casting chamber (2), a channel (3) and a heating device (4);
one end of the channel (3) is connected and communicated with the steel bearing chamber (1), the other end of the channel is connected and communicated with the steel casting chamber (2), and the heating device (4) is arranged on the channel (3).
2. A channel induction heating unit as claimed in claim 1, characterized in that the channel (3) is rectangular.
3. A channel induction heating device as claimed in claim 1, characterized in that the heating device (4) comprises: an iron core (41) and a coil (42),
the iron core (41) is an annular iron core with a notch, the coil (42) is sleeved on the iron core (41), and two end faces of the notch of the iron core (41) are respectively located on two sides of the channel (3).
4. A channel induction heating unit as claimed in claim 3, characterized in that the core (41) has a length along the channel (3) of 1/3-2/3 of the length of the channel (3), the width of the cross-section of the gap of the core (41) being adapted to the width of the channel (3).
5. A tundish, wherein the channel induction heating apparatus of any one of claims 1 to 4 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111425293.4A CN114101650A (en) | 2021-11-26 | 2021-11-26 | Channel type induction heating device and tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111425293.4A CN114101650A (en) | 2021-11-26 | 2021-11-26 | Channel type induction heating device and tundish |
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| Publication Number | Publication Date |
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| CN114101650A true CN114101650A (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111425293.4A Pending CN114101650A (en) | 2021-11-26 | 2021-11-26 | Channel type induction heating device and tundish |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58192666A (en) * | 1982-05-04 | 1983-11-10 | Kawasaki Steel Corp | Starting method of charging in continuous casting |
| JPS63168258A (en) * | 1987-01-06 | 1988-07-12 | Nippon Steel Corp | Channel refractory for intermediate channel type induction heating tundish |
| JPH07236951A (en) * | 1994-02-28 | 1995-09-12 | Nippon Steel Corp | Tundish induction heating device for continuous casting |
| JPH081289A (en) * | 1994-06-21 | 1996-01-09 | Sumitomo Metal Ind Ltd | Method for reducing inclusion in molten steel in tundish |
| CN104028737A (en) * | 2014-06-04 | 2014-09-10 | 东北大学 | Novel channel for tundish adopting channel induction heating |
| CN107520437A (en) * | 2016-06-21 | 2017-12-29 | 宝山钢铁股份有限公司 | A kind of temperature compensation means and its method of ladle long nozzle low overheat |
| JP2018066030A (en) * | 2016-10-17 | 2018-04-26 | 新日鐵住金株式会社 | Manufacturing method of high cleanliness steel |
| CN110918961A (en) * | 2019-12-24 | 2020-03-27 | 重庆大学 | Induction heating channel and tundish beneficial to removing inclusions in molten steel |
| CN210450952U (en) * | 2019-07-19 | 2020-05-05 | 安徽工业大学 | Electromagnetic induction heating tundish |
-
2021
- 2021-11-26 CN CN202111425293.4A patent/CN114101650A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58192666A (en) * | 1982-05-04 | 1983-11-10 | Kawasaki Steel Corp | Starting method of charging in continuous casting |
| JPS63168258A (en) * | 1987-01-06 | 1988-07-12 | Nippon Steel Corp | Channel refractory for intermediate channel type induction heating tundish |
| JPH07236951A (en) * | 1994-02-28 | 1995-09-12 | Nippon Steel Corp | Tundish induction heating device for continuous casting |
| JPH081289A (en) * | 1994-06-21 | 1996-01-09 | Sumitomo Metal Ind Ltd | Method for reducing inclusion in molten steel in tundish |
| CN104028737A (en) * | 2014-06-04 | 2014-09-10 | 东北大学 | Novel channel for tundish adopting channel induction heating |
| CN107520437A (en) * | 2016-06-21 | 2017-12-29 | 宝山钢铁股份有限公司 | A kind of temperature compensation means and its method of ladle long nozzle low overheat |
| JP2018066030A (en) * | 2016-10-17 | 2018-04-26 | 新日鐵住金株式会社 | Manufacturing method of high cleanliness steel |
| CN210450952U (en) * | 2019-07-19 | 2020-05-05 | 安徽工业大学 | Electromagnetic induction heating tundish |
| CN110918961A (en) * | 2019-12-24 | 2020-03-27 | 重庆大学 | Induction heating channel and tundish beneficial to removing inclusions in molten steel |
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