KR20170090281A - Cover for preheating of submerged nozzle and preheating method of submerged nozzle using the same - Google Patents
Cover for preheating of submerged nozzle and preheating method of submerged nozzle using the same Download PDFInfo
- Publication number
- KR20170090281A KR20170090281A KR1020160010934A KR20160010934A KR20170090281A KR 20170090281 A KR20170090281 A KR 20170090281A KR 1020160010934 A KR1020160010934 A KR 1020160010934A KR 20160010934 A KR20160010934 A KR 20160010934A KR 20170090281 A KR20170090281 A KR 20170090281A
- Authority
- KR
- South Korea
- Prior art keywords
- nozzle
- immersion nozzle
- cover member
- preheating
- immersion
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
-
- 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
-
- 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
- B22D41/60—Pouring-nozzles with heating or cooling means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The present invention relates to a cover for preheating an immersion nozzle and a method for preheating the immersion nozzle using the same, wherein the immersion nozzle installed in the tundish, which is a continuous casting facility, comprises a first nozzle cover member detachably coupled with the first nozzle cover member, The tundish and the immersion nozzle are preheated, the tundish heated to the target temperature and the immersion nozzle are moved to the continuous casting line to install the tundish, and then the immersion nozzle is moved from the immersion nozzle to the first nozzle cover member and the second nozzle cover By separating and removing the members, there is no need to preheat the immersion nozzle to an excessive temperature, thus saving the energy consumed in the preheating operation and reducing the cost of preheating the tundish and the immersion nozzle.
Description
The present invention relates to a cover for preheating an immersion nozzle and a method for preheating the immersion nozzle using the same, and more particularly, to a method for preventing the temperature from being lowered again during the preheating process of the immersion nozzle installed at the lower part of the tundish, The present invention relates to a cover for preheating an immersion nozzle and a method for preheating the immersion nozzle using the same.
Generally, in a continuous casting machine, molten steel is injected through a ladle and a tundish into a mold installed in a lower portion of the tundish, and the cast material molded in the mold is discharged to the lower portion of the mold and transferred to a plurality of pinch rolls, .
That is, the molten steel stored in the ladle is injected into the tundish via the shroud nozzle, molten steel injected into the tundish is injected into the mold through the immersion nozzle, and is firstly cooled and formed into a slab, Is fed through the pinch roll, cooled secondarily through the cooling water, and continuously cast.
The tundish and the immersion nozzle used in the continuous casting apparatus are prevented from being damaged due to thermal shock at the initial stage of the continuous casting operation immediately after being installed in the continuous casting line and the molten steel supplied at the beginning of the continuous casting operation is cooled It is preheated to about 1000 to 1200 ° C and then installed in a continuous casting line.
That is, the preheating operation of the tundish is performed by preheating the tundish and the immersion nozzle in a separate tundish preheating operation site for the tundish preheating operation, and then moving the tundish to the continuous casting line.
FIG. 1 is a perspective view illustrating a conventional immersion nozzle preheater. In the conventional
The preheating operation of the immersion nozzle is performed together with the preheating operation of the tundish with the immersion nozzle installed in the tundish into the
However, the conventional immersion nozzle preheater has a structure in which it can not be transported while being mounted on a tundish, and the tundish nozzle is separated from the immersion nozzle only by the operation of raising and lowering the tundish. After the preheating, There is a problem that the temperature preheated during the movement is lowered since the preheated tundish is separated and moved in the immersion nozzle preheater when the preheated tundish is lifted and lowered.
As described above, since the preheating temperature is lowered during the movement of the immersion nozzle after the preheating operation, the immersion nozzle needs to be preheated at a temperature lower than the proper preheating temperature, that is, 1500 ° C or more during the movement, There is a problem that a lot occurs.
In addition, since the immersion nozzle heats the immersion nozzle at a high temperature of 1500 ° C or more during the preheating operation, the
The conventional
An object of the present invention is to provide a cover for preheating an immersion nozzle, which can improve the convenience of the immersion nozzle preheating operation and energy utilization efficiency, and can reduce the cost required for preheating the immersion nozzle, and a method for preheating the immersion nozzle using the same.
According to an aspect of the present invention, there is provided a cover for preheating an immersion nozzle, the cover for preheating an immersion nozzle for surrounding an outer surface of the immersion nozzle for preheating operation of the immersion nozzle installed in a tundish, A first nozzle cover member which encloses a part of the lower surface of the immersion nozzle and a part of the outer surface of the immersion nozzle, and a second nozzle cover member which is combined with the first nozzle cover member to connect the remaining part of the lower surface of the immersion nozzle, And a second nozzle cover member surrounding the rest of the outer surface.
In the present invention, the inner surface of the first nozzle cover member and the inner surface of the second nozzle cover member may be formed to correspond to the outer surface of the immersion nozzle while the immersion nozzle is wrapped, .
The first nozzle cover member and the second nozzle cover member may be provided with a pair of lubrication ports opposed to each other on a lower side outer side surface of the immersion nozzle, The first and second luer aperture holes may be respectively formed.
In the present invention, the first and second luer port exposing holes and the second luer port exposing holes may be formed in a position and size to expose all of the luer ports of the immersion nozzle.
The cover for preheating the immersion nozzle according to an embodiment of the present invention may further include a nozzle opening and closing stopper inserted into the side of the side of the immersion nozzle and blocking the opening.
In the present invention, the first nozzle cover member and the second nozzle cover member may be made of a ceramic fiber.
The cover for preheating the immersion nozzle according to an embodiment of the present invention may further include a cover coupling member for coupling and fixing the first nozzle cover member and the second nozzle cover member.
In the present invention, the cover engaging member may be a fixing wire that surrounds the outer surface of the first nozzle cover member and the second nozzle cover member.
According to an aspect of the present invention, there is provided an immersion nozzle preheating method including: an immersion nozzle mounting step of mounting an immersion nozzle in a tundish separated from a continuous casting line;
A first nozzle cover member for enclosing a part of the lower surface of the immersion nozzle and a part of the outer surface of the immersion nozzle, and a second nozzle cover member for engaging with the first nozzle cover member so that the remaining part of the lower surface of the immersion nozzle, And a second nozzle cover member surrounding the remainder of the first nozzle cover member to the immersion nozzle;
A preheating step of heating the tundish and the immersion nozzle together to a target temperature;
A tundish installing step of moving the tundish heated to a target temperature and the immersion nozzle to a continuous casting line to install the tundish; And
And separating and removing the first nozzle cover member and the second nozzle cover member from the immersion nozzle after the tundish installing step.
In the present invention, the preheating step may heat the immersion nozzle to 1100 ° C to 1300 ° C.
The present invention can be easily mounted on an immersion nozzle installed in a tundish and can preheat the immersion nozzle immediately after it is mounted. After the tundish has been installed on the continuous casting line after the preheating, There is an effect that the temperature during the movement of the nozzle is prevented from being lowered.
The present invention eliminates the need for preheating the immersion nozzle to an excessive temperature, thereby saving energy consumed in the preheating operation and allowing stable use without damaging for a long time, thereby reducing the cost of preheating the immersion nozzle.
1 is a perspective view showing a conventional tundish preheater.
FIG. 2 is a bottom perspective view showing an example of use of an embodiment of a cover for preheating an immersion nozzle according to the present invention. FIG.
3 is an exploded perspective view showing an embodiment of a cover for preheating an immersion nozzle according to the present invention.
4 is a sectional view showing an example of use of a cover for preheating an immersion nozzle according to the present invention.
5 is a process diagram showing a preheating method of an immersion nozzle according to the present invention.
6 is a view illustrating an example in which the cover for preheating the immersion nozzle according to the present invention is separated and removed in a state where the tundish is installed in the continuous casting line facility.
BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in detail with reference to the accompanying drawings. Hereinafter, a repeated description, a known function that may obscure the gist of the present invention, and a detailed description of the configuration will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.
FIG. 2 is a bottom perspective view illustrating an embodiment of a cover for preheating an immersion nozzle according to the present invention, FIG. 3 is an exploded perspective view illustrating an embodiment of a cover for preheating an immersion nozzle according to the present invention, 4 is a cross-sectional view showing an example of use of the cover for preheating the immersion nozzle according to the present invention.
2 to 4, an embodiment of the cover for preheating the immersion nozzle according to the present invention will be described in detail.
An immersion nozzle (2) is installed on the lower surface of the tundish (1), which is a continuous casting facility, in a protruding manner.
The tundish 1 is installed in a continuous casting line, receives and stores molten steel introduced from the reed, and the
The
The immersion nozzle (2) is provided with a pair of openings (2a) facing each other on the lower side outer side surface.
The immersion nozzle (2) is provided with a pair of openings (2a) facing each other, and the molten steel is introduced into the mold in opposite directions in opposite directions.
The tundish 1 and the
The cover for preheating the immersion nozzle according to the present invention is formed so as to surround the outer surface of the
The cover for preheating the immersion nozzle according to the present invention includes a first
The first
The first
The second
The inner surface of the first
The shape of the first
The first
The first
The first
The cover for preheating immersion nozzle according to the present invention further includes a
The
The fixing
Although not shown, the
The cover for preheating the immersion nozzle according to the present invention further includes a nozzle
The nozzle lug
The nozzle lid
The first
The first and second luer
The first and second luer
FIG. 5 is a process diagram illustrating a method for preheating an immersion nozzle according to the present invention, and the method for preheating an immersion nozzle according to the present invention preheats an immersion nozzle using the cover for preheating the immersion nozzle according to the present invention.
Referring to FIG. 5, the immersion nozzle preheating method according to the present invention includes: an immersion nozzle mounting step (S100) in which an immersion nozzle (2) is installed in a tundish (1) separated from a continuous casting line;
A first
A preheating step (S300) of heating the tundish (1) and the immersion nozzle (2) together to a target temperature;
A tundish installing step (S400) of moving the tundish (1) and the immersion nozzle (2) heated to a target temperature to a continuous casting line to install the tundish (1); And
And a cover separating step (S500) for separating and removing the first nozzle cover member (10) and the second nozzle cover member (20) from the immersion nozzle (2) after the installation of the tundish (1).
FIG. 6 is a view illustrating an example in which the cover for preheating the immersion nozzle according to the present invention is separated and removed in a state where the
The cover for preheating the immersion nozzle is made of ceramic fiber and is light in weight. Thus, in the cover installing step and the cover removing step (S500), an operator can easily install the immersion nozzle on the
The immersion nozzle preheating method according to the present invention is characterized in that the
In the preheating step S300, it is not necessary to heat the
The present invention can be easily mounted on the
The present invention eliminates the need to preheat the immersion nozzle (2) to an excessive temperature, thereby saving the energy consumed in the preheating operation, and can be used stably without damage for a long time, thereby reducing the cost of the preheating operation of the immersion nozzle.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the above teachings. will be.
1: Tundish 2: Immersion nozzle
2a: lubrication port 10: first nozzle cover member
11: first lower surface portion 12: first side surface portion
13: first ladder opening hole 20: second nozzle cover member
21: second bottom surface portion 22: second side surface portion
23: second port aperture 30: cover engagement member
31: Fixed wire 40: Nozzle threading stopper member
Claims (10)
And a second nozzle cover member coupled to the first nozzle cover member to surround the remaining portion of the lower surface of the immersion nozzle and the rest of the outer surface of the immersion nozzle.
The inner surface of the first nozzle cover member and the inner surface of the second nozzle cover member are formed to correspond to the outer surface of the immersion nozzle while being in contact with the outer surface of the immersion nozzle A cover for preheating the immersion nozzle.
The immersion nozzle is provided with a pair of lips opposed to each other on a lower side outer side,
Wherein the first nozzle cover member and the second nozzle cover member are formed with a first luer port exposing hole and a second luer port exposing hole corresponding to both luer openings of the immersion nozzle, .
Wherein the first and second luer port exposing holes and the second luer port exposing holes are formed in positions and sizes to expose all of the luer ports of the dipping nozzle.
Further comprising a nozzle opening and closing stopper inserted into both of the opening and closing ports of the immersion nozzle to block the opening and closing port.
Wherein the first nozzle cover member and the second nozzle cover member are made of a ceramic fiber.
Further comprising a cover engaging member for engaging and fixing the first nozzle cover member and the second nozzle cover member.
Wherein the cover engaging member is a fixing wire that surrounds the outer surface of the first nozzle cover member and the outer surface of the second nozzle cover member.
A first nozzle cover member for enclosing a part of the lower surface of the immersion nozzle and a part of the outer surface of the immersion nozzle, and a second nozzle cover member for engaging with the first nozzle cover member so that the remaining part of the lower surface of the immersion nozzle, And a second nozzle cover member surrounding the remainder of the first nozzle cover member to the immersion nozzle;
A preheating step of heating the tundish and the immersion nozzle together to a target temperature;
A tundish installing step of moving the tundish heated to a target temperature and the immersion nozzle to a continuous casting line to install the tundish; And
And a cover separating step of separating and removing the first nozzle cover member and the second nozzle cover member from the immersion nozzle after the tundish installing step.
Wherein the preheating step heats the immersion nozzle to a temperature of 1100 ° C to 1300 ° C.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160010934A KR20170090281A (en) | 2016-01-28 | 2016-01-28 | Cover for preheating of submerged nozzle and preheating method of submerged nozzle using the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160010934A KR20170090281A (en) | 2016-01-28 | 2016-01-28 | Cover for preheating of submerged nozzle and preheating method of submerged nozzle using the same |
Publications (1)
Publication Number | Publication Date |
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KR20170090281A true KR20170090281A (en) | 2017-08-07 |
Family
ID=59653725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020160010934A KR20170090281A (en) | 2016-01-28 | 2016-01-28 | Cover for preheating of submerged nozzle and preheating method of submerged nozzle using the same |
Country Status (1)
Country | Link |
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KR (1) | KR20170090281A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
-
2016
- 2016-01-28 KR KR1020160010934A patent/KR20170090281A/en not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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