CN109732071A - A kind of stopper with anti-crusting heat insulation function - Google Patents
A kind of stopper with anti-crusting heat insulation function Download PDFInfo
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- CN109732071A CN109732071A CN201910071810.9A CN201910071810A CN109732071A CN 109732071 A CN109732071 A CN 109732071A CN 201910071810 A CN201910071810 A CN 201910071810A CN 109732071 A CN109732071 A CN 109732071A
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- stopper
- stick
- steel
- resistance wire
- crusting
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- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention proposes a kind of stoppers with anti-crusting heat insulation function, including the transition zone between stick tail, stick body, caput and stick body and caput, inner cavity is equipped with inside stick body, the inner cavity passes through the transition zone, one end of inner cavity lateral wall and close stick tail is equipped with a block, and stick tail is equipped with power interface, and power interface is connect with resistance wire, the resistance wire is looped around inside stick body and is located at lumen outer, and resistance wire is equipped with several circles.The stopper of the invention can be heated when stopper slag lining steel slag crusts, and steel slag is melted, to eliminate control of the crust steel slag to stopper.Simultaneously, can all there be a large amount of heat to lose from intermediate Baogang's water level in entire steel pouring process, liquid steel temperature is caused to reduce, it can not meet normally to pour and pour steel temperature requirements required for steel, stopper can also heat liquid steel level in entire steel pouring process, to avoid the temperature drop of liquid steel level, it is ensured that steel pouring process is gone on smoothly, and guarantees the stability of slab quality.
Description
Technical field
The present invention relates to continuous casting functional fire resisting material fields, particularly relate to a kind of stopper with anti-crusting heat insulation function.
Background technique
At present in continuous-casting steel pouring process, steel mainly is poured to carry out flow control using stopper.Stopper is during normal flow control
Crust object is mingled in covering agent and tundish inside molten steel in addition mainly from ladle roughing slag, manually inside tundish
The object substances such as float meet low temperature and the solidification that occurs.Stopper can be certain with having above and below stopper control mechanism during flow control
The movement of frequency will prevent the normal of stopper by stopper to fixing once occurring steel slag crust situation at stopper scouring
Work can work, the stopper being fixed, which still maintains, to be moved down since stopper is to automatically control according to the program of setting
Dynamic trend, can thus be likely to result in cracked at stopper scouring or even the case where be broken, or can draw
Stopper out-of-control phenomenon is played, the generation for pouring steel accident is finally resulted in, influences normally to pour steel progress.As shown in Figure 1, once stopper goes out
The case where now crusting, the effective ways for handling this problem at present are to add crystallizer protecting residue toward at stopper scouring, due to crystallization
Contain low molten object and the stronger substance of aggressivity in device covering slag, the erosion of stopper, quilt can be also accelerated when steel slag is melted
Corroding severe stopper will attenuate, and can also have a risk of disconnected stick, and the resistance to material in part eaten away can with the flowing of molten steel,
It is finally mixed into slab, influences slab quality, cause the appearance of new hidden danger.
In addition, in steel pouring process, it, can be in order to reduce the lost of liquid steel temperature and inclusion content in melting steel be promoted to float
Between packet liquid level add coverture.A large amount of tundish covering flux can be added in entire steel pouring process, although coverture is reducing
Liquid steel temperature scatters and disappears and has positive effect in terms of promoting inclusion content in melting steel to float, but coverture is for pure molten steel
It is exotic after all, the use of excessive coverture will cause the certain pollution of molten steel, and coverture is melting or burned
Cheng Zhonghui generates certain pollutant, has certain harm to workshop condition and worker's body, and coverture can only be to centre
It delays or reduces the effect of temperature drop to the liquid level temperature drop of Baogang's water, but cannot prevent the generation of molten steel temperature drop.
Summary of the invention
The present invention proposes a kind of stopper with anti-crusting heat insulation function, may be implemented in terms of anti-crusting more rationally,
Controllably, efficiently, intelligent slugging control, secondary pollution and damage are not caused to molten steel and stopper；In terms of heat preservation, the company of may be implemented
The continuous effect that liquid steel level heat, and steel temperature requirements are poured according to molten steel is practical, it can control the height of heating temperature, make entirely
The molten steel of casting can be realized digital accurate controllable purpose.
The technical scheme of the present invention is realized as follows:
A kind of stopper with anti-crusting heat insulation function, including the mistake between stick tail, stick body, caput and stick body and caput
Layer is crossed, inner cavity is equipped with inside stick body, the inner cavity is equipped with across the transition zone, inner cavity lateral wall and close to one end of stick tail
Silk block, stick tail are equipped with power interface, and power interface is connect with resistance wire, and the resistance wire is looped around inside stick body and is located at inner cavity
Outside, resistance wire are equipped with several circles.
Preferably, the resistance wire and stopper outer wall distance are 10-40mm.
Preferably, the resistance wire is according to the practical thickness of slag layer situation of stopper actual design and steel mill, and resistance wire is in stick body
Interior height is 20-600mm, and stopper exposes molten steel part, has and contain resistance wire in the height of 50-300mm.
Preferably, initial position of the resistance wire in stick body is apart from stick tail 200-700mm.
Preferably, the resistance wire material uses silicon carbide material, silicon carbon material, molybdenum disilicide material, nickel chromium triangle material, iron
One of chromium nickel and siderochrome aluminium material.
Preferably, according to the difference of stopper outer diameter, resistance wire line footpath is 1-8mm.
Preferably, after the transition zone is mixed using stick body material and caput material according to the ratio of mass ratio 1: 1 or 2: 1 up and down
It is compound, or a part of cuttage of stick body material is used into inside and outside complex method inside caput material.
The invention has the benefit that
Stopper of the invention can be heated when stopper slag lining steel slag crusts, and steel slag is melted, to eliminate knot
Control of the shell steel slag to stopper.Meanwhile can all there be a large amount of heat to scatter and disappear in entire steel pouring process from intermediate Baogang's water level
Fall, liquid steel temperature is caused to reduce, can not meet normally to pour and pour steel temperature requirements required for steel, stopper can also entirely pour steel
Liquid steel level is heated in the process, to avoid the temperature drop of liquid steel level, it is ensured that steel pouring process is gone on smoothly, and guarantees slab matter
The stability of amount.Stopper also imparts it and melts crust steel slag and to intermediate Baogang's aqueous in addition to normal flow control effect
The function of face heating and thermal insulation.Especially there is critically important positive effect in terms of ensureing that long-time pours steel and clean steel casting, make
It is more intelligent to obtain continuous-casting steel pouring system, also has great practical function to slab quality and continuous casting workshop environment is improved.
It is realized in the normal steel pouring process of tundish by adding tundish covering flux in Metal in Tundish liquid level at present
The effect of molten steel is kept the temperature, but can all have certain temperature drop amount in steel pouring process, middle covering agent only slows down molten steel temperature
It is constant that the reduction process of degree is not able to maintain liquid steel temperature.And contain heating wire inside stopper of the present invention, by adding to heating wire
Heat realizes purpose that stopper heats molten steel, realizes that liquid steel temperature is kept constant in entire steel pouring process, avoids molten steel
The reduction of temperature.
Crust refers to that the steel slag positioned at Metal in Tundish liquid level becomes solid because temperature is reduced from liquid, i.e., steel slag is solidifying
Gu being known as crusting.By preventing the reduction of steel slag temperature, Lai Shixian steel slag begins stopper provided by the invention in entire steel pouring process
Liquid condition, the purpose of Lai Shixian anti-crusting are kept eventually.
Because stopper stick body material is different with the thermal expansion coefficient of caput material, if be directly combined together the two, having very much can
It can generation because of thermal expansion problem, the case where cracked therebetween or fracture.To prevent stopper being heated or using
Lead to cracked or crack conditions the generation between caput material and stick body material because thermally expanding asynchronous problem in journey, needs
One section of transition zone is added between caput material and stick body material, the thermal expansion coefficient of transition zone is located at caput material and the thermal expansion of stick body material is
Between number, thus the effect of transition zone be enable caput material in conjunction with stick body material when the thermal expansion coefficient that both makes occur one section
Buffer strip, to prevent cracked or fracture accident generation therebetween.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of stopper in the prior art；
Fig. 2 is the structural schematic diagram for the stopper that the present invention has anti-crusting heat insulation function.
Wherein, 1. power interface, 2. blocks, 3. resistance wires, 4. stick bodies, 5. inner cavities, 6. transition zones, 7. caputs.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1:
A kind of stopper with anti-crusting heat insulation function, as shown in Fig. 2, including stick tail, stick body 4, caput 7 and stick body 4
Transition zone 6 between caput 7, inner cavity 5 is equipped with inside stick body 4, and the inner cavity 5 passes through the transition zone 6, the main work of caput
With being to play the role of flow control with the cooperation of middle-ladle nozzle cover portion, to keep the good flow control effect of caput in steel pouring process,
Anti- molten steel scouring capability must be eager to excel, and transition zone only plays the role of a transition between stick body material and caput material,
Anti- molten steel scouring capability is weaker, and why Transition Materials are not extended through caput is because transition zone and caput material are resisting molten steel
It is asynchronous to wash away aspect, to keep club head position that integrality and anti-molten steel is kept to wash away consistency in steel pouring process, so mistake
It crossing layer and not extending through caput, 5 lateral wall of inner cavity and block 2 is installed close to one end of stick tail, stick tail is equipped with power interface 1,
Power interface 1 is connect with resistance wire 3, and the resistance wire 3 is looped around 4 inside of stick body and is located at outside inner cavity 5, by line footpath 3mm's
The resistance wire 3 of nickel chromium triangle material is coiled into the annulus that 5 loop diameters are 60mm, and the center position in core rod is covered in stopper molding, and
There is partial ohmic silk 3 to expose stick tail, make resistance wire 3 apart from stopper ectosome 20mm, be placed on together with stopper pug 125MPa etc.
It is formed in static pressure machine.After stopper after molding demoulding, under the voltage of 220V, it is connect by resistance wire 3 with extraneous power supply,
Under the heating rate of setting, after 1h, 3 position of resistance wire is filled inside stopper, is 350 DEG C by temperature-measuring gun measurement temperature, symbol
The heating rate requirement for closing setting, stopper dress 3 position of resistance wire reddens after continuing heating 2h, the temperature at the position measured at this time
It is 1085 DEG C, meets normal heating curve setting.
Based on the above technical solution, the resistance wire 3 is according to the practical thickness of slag layer of stopper actual design and steel mill
Situation, height of the resistance wire 3 in stick body 4 are 20-600mm, and stopper exposes molten steel part, has in the height of 50-300mm and contain
Resistance wire 3.
Based on the above technical solution, initial position of the resistance wire 3 in stick body 4 is apart from stick tail 200-
700mm。
Based on the above technical solution, according to the difference of stopper outer diameter, resistance wire line footpath is 1-8mm.
Based on the above technical solution, the transition zone is using stick body material and caput material according to mass ratio 1: 1 or 2: 1
Ratio mixing after up and down it is compound, or by a part of cuttage of stick body material inside caput material use inside and outside complex method.
Embodiment 2:
The resistance wire 3 of the nickel chromium triangle material of line footpath 2.5mm is coiled into the annulus that 5 loop diameters are 50mm, is covered in stopper molding
In the center position of core rod, and there is partial ohmic silk 3 to expose stick tail, makes resistance wire 3 apart from stopper ectosome 25mm, with stopper mud
Material, which is placed on together in the isostatic pressing machine of 125MPa, to be formed.After stopper after molding demoulding, under the voltage of 220V, pass through resistance
Silk 3 is connect with extraneous power supply, under the heating rate of setting, after 1h, 3 position of resistance wire is filled inside stopper, by thermometric
It is 251 DEG C that rifle, which measures temperature, and lower than the heating rate requirement of setting, stopper dress 3 position of resistance wire reddens after continuing heating 3h, this
When the temperature at the position that measures be 1074 DEG C, subnormal heating curve setting.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of stopper with anti-crusting heat insulation function, which is characterized in that including stick tail, stick body, caput and stick body and stick
Transition zone between head, stick body inside are equipped with inner cavity, and the inner cavity is across the transition zone, inner cavity lateral wall and close to stick tail
One end is equipped with a block, and stick tail is equipped with power interface, and power interface is connect with resistance wire, and the resistance wire is looped around inside stick body
And it is located at lumen outer, resistance wire is equipped with several circles.
2. a kind of stopper with anti-crusting heat insulation function as described in claim 1, which is characterized in that the resistance wire and plug
Stick outer wall distance is 10-40mm.
3. a kind of stopper with anti-crusting heat insulation function as described in claim 1, which is characterized in that the resistance wire is in stick
Height in body is 20-600mm.
4. a kind of stopper with anti-crusting heat insulation function as described in claim 1, which is characterized in that the resistance wire is in stick
Initial position in body is apart from stick tail 200-700mm.
5. a kind of stopper with anti-crusting heat insulation function as described in claim 1, which is characterized in that the resistance wire material
Using one of silicon carbide material, silicon carbon material, molybdenum disilicide material, nickel chromium triangle material, siderochrome nickel and siderochrome aluminium material.
6. a kind of stopper with anti-crusting heat insulation function as described in claim 1, which is characterized in that resistance wire line footpath is 1-
8mm。
7. a kind of stopper with anti-crusting heat insulation function as described in claim 1, which is characterized in that preferred, the mistake
Layer is crossed using stick body material and caput material according to upper and lower compound after the ratio mixing of mass ratio 1: 1 or 2: 1, or by one, stick body material
Cuttage is divided to use inside and outside complex method inside caput material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910071810.9A CN109732071A (en) | 2019-01-24 | 2019-01-24 | A kind of stopper with anti-crusting heat insulation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910071810.9A CN109732071A (en) | 2019-01-24 | 2019-01-24 | A kind of stopper with anti-crusting heat insulation function |
Publications (1)
| Publication Number | Publication Date |
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| CN109732071A true CN109732071A (en) | 2019-05-10 |
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ID=66366084
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910071810.9A Pending CN109732071A (en) | 2019-01-24 | 2019-01-24 | A kind of stopper with anti-crusting heat insulation function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111906289A (en) * | 2020-08-27 | 2020-11-10 | 北京利尔高温材料股份有限公司 | Argon blowing stopper rod and manufacturing method thereof |
| CN113560559A (en) * | 2021-09-27 | 2021-10-29 | 北京利尔高温材料股份有限公司 | Preparation method of long-life submerged nozzle and long-life submerged nozzle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111906289A (en) * | 2020-08-27 | 2020-11-10 | 北京利尔高温材料股份有限公司 | Argon blowing stopper rod and manufacturing method thereof |
| CN111906289B (en) * | 2020-08-27 | 2022-04-12 | 日照利尔高温新材料有限公司 | Argon blowing stopper rod and manufacturing method thereof |
| CN113560559A (en) * | 2021-09-27 | 2021-10-29 | 北京利尔高温材料股份有限公司 | Preparation method of long-life submerged nozzle and long-life submerged nozzle |
| CN113560559B (en) * | 2021-09-27 | 2022-01-07 | 日照利尔高温新材料有限公司 | Preparation method of long-life submerged nozzle and long-life submerged nozzle |
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