CN107520437A - A kind of temperature compensation means and its method of ladle long nozzle low overheat - Google Patents
A kind of temperature compensation means and its method of ladle long nozzle low overheat Download PDFInfo
- Publication number
- CN107520437A CN107520437A CN201610450120.0A CN201610450120A CN107520437A CN 107520437 A CN107520437 A CN 107520437A CN 201610450120 A CN201610450120 A CN 201610450120A CN 107520437 A CN107520437 A CN 107520437A
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- China
- Prior art keywords
- long nozzle
- ladle
- molten steel
- temperature
- tundish
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Classifications
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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
- B22D41/50—Pouring-nozzles
Abstract
The invention discloses a kind of temperature compensation means of ladle long nozzle low overheat, tundish including ladle, below ladle and the crystallizer below tundish, ladle lower end is provided with long nozzle, also include the coreless induction heater on long nozzle, to carry out heating compensation to the molten steel for flowing through long nozzle.The present invention can carry out effective temperature compensation to low overheat molten steel, ensure that the stabilization of liquid steel temperature in casting process.
Description
Technical field
The present invention relates to direct casting field, is mended more specifically to a kind of temperature of ladle long nozzle low overheat
Repay devices and methods therefor.
Background technology
In continuous casting production process, if molten steel overheat is too high, thick grain structure will be produced in continuous casting billet,
Shrinkage cavity, loose or even centre burst are easily produced, and is segregated serious.In order to improve the internal soundness of strand, it is necessary to strictly control
The degree of superheat of molten steel processed, realize stable low temperature casting.But when molten steel overheat is reduced to certain temperature, the slag inclusion of strand
And inclusion defect increase；If molten steel overheat continues to reduce, it is possible to causes nozzle blocking or even break to pour.Therefore in order to protect
Card casting direct motion, reduces continuous casting billet internal flaw, it is necessary to by the control of molten steel cast temperature in certain effective range.
In existing Tundish Heating technology, using plasma heating and channel-type sensing heating are main heating side
Formula.
In document《Continuous casting production channel-type induction heating equipment designs and applies present situation》And《Continuous casting production splayed configuration
The research and development and application of passage sensing heating and refining techniques》Both mode of heatings are carried out with more detailed description：
The general principle of plasma heating is to convert electrical energy into heat energy by plasma, utilizes conduction and radiation two
Kind heat exchange mode transfers thermal energy to molten steel.The using effect of the technology is unsatisfactory, and its main cause is：Pouring basket liquid level slag
Too thick, the starting the arc is difficult, and the efficiency of heating surface is low, is 60%~70%；Accuracy of temperature control is poor, is ± the 5C of target temperature；Tundish beam
Area's liquid level fluctuation of molten steel is big；Equipment work noise is too big, makes one to be difficult to bear；Electromagnetic radiation is to weak electricity system caused by plasma
Disturb；Plasma torch heats in FX, easily makes temperatures at localized regions is too high to cause refractory consumption rate big, gas
The ionization of body causes molten steel nitrogen pick-up mass fraction to be 6 × 10-6.Therefore, although also having constantly improve to use this technology in the world
Report, but domestic Duo Jia iron and steel enterprises disabled, remove early stage introduce this mode of heating.
Tundish channel type sensing heating is based on electromagnetic induction principle, and Joule heat is added in into stream by induced current in molten steel
In molten steel through passage, molten steel insulation and heating are realized.Its efficiency of heating surface is more than 90%, and accuracy of temperature control is high, is target temperature
± 2 DEG C.It is pollution-free to molten steel because it uses contactless energy transmission mode.Substantially noiseless and electromagnetic radiation.So
And the induction heating equipment reasonability of installation site and its type of cooling, existing tundish platform space inside tundish
The limitation that finiteness etc. is installed to sensing heating and its auxiliary device governs tundish channel type induction heating technique always
Development and popularization and application.
The content of the invention
For above-mentioned the deficiencies in the prior art, it is an object of the invention to provide a kind of ladle long nozzle low overheat
Temperature compensation means and its method, can to low overheat molten steel carry out effective temperature compensation, ensure that steel in casting process
The stabilization of coolant-temperature gage.
To achieve the above object, the present invention adopts the following technical scheme that：
On the one hand, a kind of temperature compensation means of ladle long nozzle low overheat, including ladle, below ladle in
Between bag and the crystallizer below tundish, ladle lower end is provided with long nozzle, in addition to the centreless sense being located on long nozzle
Heater is answered, to carry out heating compensation to the molten steel for flowing through long nozzle.
Described coreless induction heater includes power supply, capacitor and the electromagnetic induction coil being sequentially connected electrically, electromagnetism
Induction coil is sheathed on long nozzle.
On the other hand, a kind of temperature compensation of ladle long nozzle low overheat, comprises the following steps：
S1. contained in ladle into molten steel；
S2. the molten steel in ladle is poured into tundish by long nozzle；
S3. temperature-compensating heating is carried out to flowing through the molten steel in long nozzle by coreless induction heater, be maintained into
Liquid steel temperature in tundish；
S4. the molten steel in tundish is flowed into crystallizer by middle water containing opening；
S5. throwing casting is carried out.
When temperature-compensating is carried out in described S3, the power of electromagnetic induction coil and heat time are：
P=CpQΔT
P is effective power in formula, CpMolten steel specific heat, Q are steel -passing amount, and Δ T is compensation temperature.
Described coreless induction heater includes power supply, capacitor and the electromagnetic induction coil being sequentially connected electrically, electromagnetism
Induction coil is sheathed on long nozzle, and temperature-compensating heating is carried out to flowing through the molten steel in long nozzle by electromagnetic induction coil.
In the above-mentioned technical solutions, it is also an advantage of the present invention that：
1. traditional tundish sensing heating, due to being embedded to induction heating apparatus, the cavity volume of tundish reduces, is mingled with
Thing floating reduced capability, liquid steel temperature lack of homogeneity, temperature drop are big.The present invention is right in the case of it need not change tundish structure
Molten steel of casting carries out temperature-compensating, can not only improve casting blank inner organization, while avoids because tundish structure changes band
The series of malpractice come.
2. the present invention compares traditional tundish sensing heating, it is not necessary to changes existing tundish outer shape and ladle
Casting position, easily transformation is implemented at scene.
3. the coreless induction heater that the present invention uses, without being embedded to induction heating apparatus in each tundish, make
Valency and refractory consumption rate significantly reduce.
Brief description of the drawings
Fig. 1 is the schematic diagram of structure of the present invention；
Fig. 2 is the schematic diagram of the principle of the invention；
Fig. 3 is the schematic diagram of the temperature and time contrast of molten steel outflow in the tundish of the present invention.
Embodiment
Technical scheme is further illustrated with reference to the accompanying drawings and examples.
Incorporated by reference to shown in Fig. 1, a kind of temperature compensation means of ladle long nozzle low overheat of the invention, including ladle 1,
Tundish 3 located at the lower section of ladle 1 and the crystallizer 5 located at the lower section of tundish 3, the lower end of ladle 1 is provided with long nozzle 2, also wrapped
The coreless induction heater 6 on long nozzle 2 is included, to carry out heating compensation to the molten steel 7 for flowing through long nozzle 2.
Incorporated by reference to shown in Fig. 2, described coreless induction heater 6 includes power supply 601, the electric capacity being sequentially connected by electricity
Device 602 and electromagnetic induction coil 603, electromagnetic induction coil 603 are located at the surrounding of long nozzle 2.When alternating current is by wire,
Alternating magnetic field is produced around it, and molten steel 7 is placed in the magnetic field of change, alternating current-vortex can be induced in molten steel 7, steel
Water 7 relies on eddy heating for heating, and heat can be represented with Joule-Lenz's law caused by vortex, i.e.,：
Q=0.24I2Rt
In above-mentioned formula, Q is heat, and I is current strength, and R is molten steel resistance, and t is the time (second).
On the other hand, a kind of temperature compensation of ladle long nozzle low overheat, comprises the following steps：
S1. first contained in ladle 1 into molten steel 7；
S2. after molten steel 7 is opened and poured, the molten steel 7 in ladle 1 is flowed into tundish 3 by long nozzle 2；
S3. temperature-compensating heating is carried out to flowing through the molten steel 7 in long nozzle 2 by electromagnetic induction coil 603, be maintained into
The temperature of molten steel 7 in tundish 3；
S4. the molten steel 7 in tundish 3 after being heated, crystallizer 5 is flowed into by middle water containing opening 4 again；
S5. it is last, then carry out throwing casting.
It is public according to heat balance formula and the thermal efficiency when carrying out temperature-compensating to the molten steel 7 in long nozzle in described S3
Formula, the parameter such as cohesive process cooling, the capacity of tundish 3, the flow of molten steel 7, can calculate electromagnetic induction under different time and power
Coil 603 is to the temperature of molten steel 7, i.e.,：
P=CpQΔT
In above-mentioned formula, P is effective power, CpMolten steel specific heat, Q are steel -passing amount, and Δ T is compensation temperature.
In above-mentioned formula, ηkFor efficiency, P is effective power, and P0 is heater input power.
Temperature after temperature-compensating heating is carried out to molten steel 7 using the present invention, incorporated by reference to shown in Fig. 3, the capacity of ladle 1 is
150t, steel -passing amount 3t/min, the capacity of tundish 3 is 3t, and the cooling of tundish 3 in the process is 1 DEG C/min, is opened after pouring,
Molten steel 7 enters tundish 3 from long nozzle 2, opens coreless induction heater 6, and coreless induction heater 6 sets power and used
1000kw, efficiency 0.85, until the casting of ladle 1 terminates, the temperature of molten steel 7 that crystallizer 5 is injected from middle water containing opening 4 is basic
It is stable in 1464 DEG C.
Those of ordinary skill in the art it should be appreciated that the embodiment of the above be intended merely to explanation the present invention,
And be not used as limitation of the invention, as long as in the spirit of the present invention, the change to embodiment described above
Change, modification will all fall in the range of claims of the present invention.
Claims (5)
1. a kind of temperature compensation means of ladle long nozzle low overheat, including ladle, the tundish below ladle and
Crystallizer below tundish, ladle lower end are provided with long nozzle, it is characterised in that also include the centreless on long nozzle
Induction heating apparatus, to carry out heating compensation to the molten steel for flowing through long nozzle.
2. a kind of temperature compensation means of ladle long nozzle low overheat as claimed in claim 1, it is characterised in that described
Coreless induction heater includes power supply, capacitor and the electromagnetic induction coil being sequentially connected electrically, and electromagnetic induction coil is sheathed on
On long nozzle.
3. a kind of temperature compensation of ladle long nozzle low overheat, it is characterised in that comprise the following steps：
S1. contained in ladle into molten steel；
S2. the molten steel in ladle is poured into tundish by long nozzle；
S3. temperature-compensating heating is carried out to flowing through the molten steel in long nozzle by coreless induction heater, is maintained into centre
Liquid steel temperature in bag；
S4. the molten steel in tundish is flowed into crystallizer by middle water containing opening；
S5. throwing casting is carried out.
4. a kind of temperature compensation of ladle long nozzle low overheat as claimed in claim 3, it is characterised in that described
When temperature-compensating is carried out in S3, the power of electromagnetic induction coil and heat time are：
P=CpQΔT
P is effective power in formula, CpMolten steel specific heat, Q are steel -passing amount, and Δ T is compensation temperature.
5. a kind of temperature compensation of ladle long nozzle low overheat as claimed in claim 3, it is characterised in that described
Coreless induction heater includes power supply, capacitor and the electromagnetic induction coil being sequentially connected electrically, and electromagnetic induction coil is sheathed on
On long nozzle, temperature-compensating heating is carried out to flowing through the molten steel in long nozzle by electromagnetic induction coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610450120.0A CN107520437A (en) | 2016-06-21 | 2016-06-21 | A kind of temperature compensation means and its method of ladle long nozzle low overheat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610450120.0A CN107520437A (en) | 2016-06-21 | 2016-06-21 | A kind of temperature compensation means and its method of ladle long nozzle low overheat |
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| CN107520437A true CN107520437A (en) | 2017-12-29 |
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| CN201610450120.0A Pending CN107520437A (en) | 2016-06-21 | 2016-06-21 | A kind of temperature compensation means and its method of ladle long nozzle low overheat |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109759576A (en) * | 2019-03-19 | 2019-05-17 | 北京科技大学 | It is a kind of for heating the device and its dynamic control method of molten steel in submersed nozzle |
| CN110057864A (en) * | 2019-05-08 | 2019-07-26 | 北京科技大学 | A kind of simulator and method of molten steel heating process in the channel of the mouth of a river |
| CN114101650A (en) * | 2021-11-26 | 2022-03-01 | 东北大学 | Channel type induction heating device and tundish |
| CN114523097A (en) * | 2022-01-13 | 2022-05-24 | 北京科技大学 | Long nozzle coating temperature regulation system and method in continuous casting production |
| CN116117095A (en) * | 2023-01-06 | 2023-05-16 | 江苏省沙钢钢铁研究院有限公司 | High-carbon steel wire rod and preparation method thereof |
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| CN102814494A (en) * | 2012-08-10 | 2012-12-12 | 沈阳东北大学冶金技术研究所有限公司 | Molten steel heating method of continuous casting tundish |
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| JPS6149767A (en) * | 1984-08-13 | 1986-03-11 | Nippon Kokan Kk <Nkk> | Method for preventing clogging of nozzle provided to bottom wall of vessel for containing molten metal |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109759576A (en) * | 2019-03-19 | 2019-05-17 | 北京科技大学 | It is a kind of for heating the device and its dynamic control method of molten steel in submersed nozzle |
| CN110057864A (en) * | 2019-05-08 | 2019-07-26 | 北京科技大学 | A kind of simulator and method of molten steel heating process in the channel of the mouth of a river |
| CN110057864B (en) * | 2019-05-08 | 2020-02-07 | 北京科技大学 | Simulation device and method for heating process of molten steel in water gap channel |
| CN114101650A (en) * | 2021-11-26 | 2022-03-01 | 东北大学 | Channel type induction heating device and tundish |
| CN114523097A (en) * | 2022-01-13 | 2022-05-24 | 北京科技大学 | Long nozzle coating temperature regulation system and method in continuous casting production |
| CN116117095A (en) * | 2023-01-06 | 2023-05-16 | 江苏省沙钢钢铁研究院有限公司 | High-carbon steel wire rod and preparation method thereof |
| CN116117095B (en) * | 2023-01-06 | 2023-06-20 | 江苏省沙钢钢铁研究院有限公司 | High-carbon steel wire rod and preparation method thereof |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171229 |
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| RJ01 | Rejection of invention patent application after publication |