KR101789571B1 - Apparatus for preventing nozzle clogging - Google Patents
Apparatus for preventing nozzle clogging Download PDFInfo
- Publication number
- KR101789571B1 KR101789571B1 KR1020150185009A KR20150185009A KR101789571B1 KR 101789571 B1 KR101789571 B1 KR 101789571B1 KR 1020150185009 A KR1020150185009 A KR 1020150185009A KR 20150185009 A KR20150185009 A KR 20150185009A KR 101789571 B1 KR101789571 B1 KR 101789571B1
- Authority
- KR
- South Korea
- Prior art keywords
- nozzle
- vibration
- immersion nozzle
- mold
- container
- Prior art date
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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
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/064—Accessories therefor for supplying molten metal
- B22D11/0642—Nozzles
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
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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
- B22D41/62—Pouring-nozzles with stirring or vibrating means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The present invention relates to an apparatus for preventing clogging of a nozzle, and more particularly, to an apparatus for preventing clogging of a nozzle for preventing inclusion on the inner wall of a nozzle during a continuous casting process.
An apparatus for preventing clogging of a nozzle according to an embodiment of the present invention is an apparatus for preventing clogging of a nozzle for supplying molten steel introduced from a first vessel to a second vessel through an inlet formed at an upper portion thereof and a discharge port formed at a lower portion thereof, A vibrating part for vibrating the second container; And a vibration applying portion for vibrating the nozzle substantially the same as the second container.
Description
The present invention relates to an apparatus for preventing clogging of a nozzle, and more particularly, to an apparatus for preventing clogging of a nozzle for preventing inclusion on the inner wall of a nozzle during a continuous casting process.
In a typical continuous casting process, the molten steel contained in the ladle is injected into the tundish, the molten steel injected from the tundish is continuously injected into the mold to cool the molten steel first, and then the cooling water is sprayed on the surface of the primary cooled steel And cools the molten steel according to cooling the steel to produce a cast steel.
In the continuous casting process, the immersion nozzle is a nozzle structure for injecting molten steel contained in a tundish into a mold, and is immersed under the slag line at the bottom of the slag. The immersion nozzle serves to keep the molten steel flowing into the mold, stabilize the molten steel flow in the mold, and block the inflow of air, and is usually made of refractory material.
In the molten steel, alumina (Al 2 O 3 ) inclusions exist, and micro-inclusions which are not removed by floating separation adhere to the inner wall of the immersion nozzle connecting the tundish and the mold, thereby causing the immersion nozzle to become clogged. However, there is no technique to completely prevent clogging of the immersion nozzle until now, and it is known that the complete removal of the immersion nozzle clogging is difficult as long as inclusions in the molten steel generated in the deoxidation are present in the manufacturing process.
Such clogging of the immersion nozzle has a considerably negative effect on the operation. For example, difficulties in securing a discharge amount due to clogging of nozzles, hunting at a mold level caused by repetition of nozzle clogging and punching, and stoppage of casting due to rapid nozzle clogging are typical problems. Accordingly, there is a need for a method for preventing the inclusion of the inclusion in the immersion nozzle from clogging the immersion nozzle.
An object of the present invention is to provide an apparatus for preventing clogging of a nozzle that can prevent nozzle clogging due to inclusion in a nozzle.
The present invention also provides an apparatus for preventing clogging of a nozzle that prevents inclusions from adhering to the inner wall of the nozzle and prevents the adhered inclusions from growing.
An apparatus for preventing clogging of a nozzle according to an embodiment of the present invention is an apparatus for preventing clogging of a nozzle for supplying molten steel introduced from a first vessel to a second vessel through an inlet port formed at an upper portion thereof and a discharge port formed at a lower portion thereof, A vibrating part for vibrating the second container; And a vibration applying portion for vibrating the nozzle substantially the same as the second container.
The vibration applying unit may transmit vibration of the second container to the nozzle.
The vibrating portion can vibrate the second container in the vertical direction.
The vibration applying unit may include a connection member having one end fixed to the outer wall of the nozzle and the other end fixed to the side wall of the second container.
And a nozzle holder installed on a bottom surface of the first container to support an upper portion of the nozzle.
The upper portion of the nozzle may have a latching portion protruding outwardly along the periphery thereof. The nozzle holder may be formed with a receiving portion which is inserted inwardly to receive the latching portion.
The inner wall of the nozzle holder which is in contact with the nozzle may have a concavo-convex shape.
The first and second containers may be tundishes and molds, and the nozzle may be an immersion nozzle.
According to the apparatus for preventing clogging of the nozzle according to the embodiment of the present invention, the immersion nozzle is vibrated substantially in the same manner as the mold to which the molten steel is supplied, and clogging is caused by accumulation of inclusions in the immersion nozzle without changing the molten steel flow Can be prevented.
In addition, by matching the vibration width and the vibration period of the immersion nozzle with the vibration width and the vibration period at the vibration of the mold, it is possible to minimize the change in the flow of the molten steel due to the mold vibration which is not generally considered in the designing process, Or predicted results in the initial design according to the discharge amount control can be secured as it is.
That is, according to the apparatus for preventing clogging of the nozzle according to the embodiment of the present invention, the clogging phenomenon of the immersion nozzle can be effectively prevented so that the inclusions are mixed into the mold or the slag of the bath surface is mixed, The productivity of the high-clean steel production and the continuous casting process can be improved.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic representation of a typical continuous casting installation.
2 is a cross-sectional view showing a state in which an inclusion is attached to a nozzle.
FIG. 3 is a view showing a device for preventing clogging of a nozzle according to an embodiment of the present invention. FIG.
4 is a view showing a state where a nozzle according to an embodiment of the present invention is coupled with a nozzle holder;
5 is a view showing a state in which a nozzle vibrates according to an embodiment of the present invention.
6 is a view showing a state where a nozzle according to another embodiment of the present invention is coupled with a nozzle holder;
The apparatus for preventing clogging of the nozzle according to the present invention can vibrate the nozzle substantially the same as the second container to which the molten steel is supplied so as to prevent clogging of the nozzle due to inclusions being accumulated in the nozzle without changing the molten steel flow It presents the technical features.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, Is provided to fully inform the user. Wherein like reference numerals refer to like elements throughout.
In general, the continuous casting facility receives the molten steel produced in the steelmaking process in a ladle, receives it in a tundish using a shroud nozzle in a continuous casting process, then supplies it to a mold by an immersion nozzle, .
1 is a schematic view showing a general continuous casting facility; Referring to FIG. 1, the continuous casting equipment will be described in more detail. First, the
With respect to such a continuous casting facility, in the embodiment of the present invention, the first and second containers correspond to the tundish and the mold, respectively, and the nozzle means an immersion nozzle, It is needless to say that the present invention is applicable to any kind of container and nozzle in which molten steel accommodated in the first container can be supplied to the second container and the inclusion can be attached to the inner wall.
2 is a cross-sectional view showing a state in which an inclusion is attached to a nozzle.
Aluminum (Al 2 O 3 ) is added as a method for removing oxygen in charcoal in the refining process during the integrated steelmaking process. The introduced aluminum reacts with oxygen to form an inclusion, that is, alumina. Of these, generally large inclusions are separated by floating and removed, but inclusions having a small size are moved in accordance with the flow of molten steel. In the continuous casting process, the inclusions may be separated again from the tundish 30, but they are attached to the inner wall of the nozzle by reacting with the refractory of the
The accumulation of the inclusions in the
Accordingly, a number of techniques have been developed for preventing the accumulation of inclusions in the
Here, the method of vibrating the
However, in the case of the
In order to prevent the molten steel from adhering to the wall surface of the
FIG. 3 is a view showing an apparatus for preventing clogging of a nozzle according to an embodiment of the present invention.
3, an apparatus for preventing clogging of a nozzle according to an embodiment of the present invention includes an inlet port formed at an upper portion thereof and a discharge port formed at a lower portion thereof to block clogging of nozzles for supplying molten steel introduced from the first container to the second container (400) for vibrating the second container; And a vibration applying portion for vibrating the nozzle substantially the same as the second container.
That is, the apparatus for preventing clogging of the nozzle according to the embodiment of the present invention can prevent the clogging of the
Here, the same vibration means that the vibration width and the vibration period are substantially the same, and substantially the same vibration width and vibration period are determined by the vibration width of the
Further, in order to vibrate the
The vibration applying unit is provided with one end fixed to the outer wall of the
FIG. 4 is a view showing a state where a nozzle according to an embodiment of the present invention is coupled with a nozzle holder, and FIG. 5 is a view showing a state in which a nozzle vibrates according to an embodiment of the present invention.
4 and 5, an apparatus for preventing clogging of a nozzle according to an embodiment of the present invention includes a first container, that is, a nozzle holder (not shown) installed on the bottom surface of the
In general, in a continuous casting process, a
Accordingly, in the apparatus for preventing clogging of the nozzle according to the embodiment of the present invention, the upper part of the
The engaging
The
The height h of the receiving
6 is a view showing a state where a nozzle according to another embodiment of the present invention is coupled with a nozzle holder.
Referring to FIG. 6, an apparatus for preventing clogging of a nozzle according to another exemplary embodiment of the present invention includes a
The concave and
In this manner, when the
Second, by matching the vibration width and the vibration period of the
While the preferred embodiments of the present invention have been described and illustrated above using specific terms, such terms are used only for the purpose of clarifying the invention, and the embodiments of the present invention and the described terminology are intended to be illustrative, It will be obvious that various changes and modifications can be made without departing from the spirit and scope of the invention. Such modified embodiments should not be individually understood from the spirit and scope of the present invention, but should be regarded as being within the scope of the claims of the present invention.
30: Tundish 40: Mold
100: immersion nozzle 120:
200: connecting member 300: nozzle holder
320: accommodating part 400: vibrating part
Claims (8)
A vibrating part for vibrating the second container; And
And a vibration applying portion for vibrating the nozzle substantially the same as the second container,
Wherein the vibration applying unit transmits the vibration of the second container to the nozzle.
And the vibrating unit vibrates the second container in the vertical direction.
The vibration-
And a connecting member having one end fixed to the outer wall of the nozzle and the other end fixed to a side wall of the second container.
And a nozzle holder installed on a bottom surface of the first container to support an upper portion of the nozzle.
The nozzle has an upper portion formed with an engaging portion protruding outward along the periphery,
Wherein the nozzle holder is formed with a receiving portion that is embedded inward to receive the engaging portion.
Wherein the inner wall of the nozzle holder in contact with the nozzle is formed in a concavo-convex shape.
Wherein the first and second containers are a tundish and a mold, and the nozzle is an immersion nozzle.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020150185009A KR101789571B1 (en) | 2015-12-23 | 2015-12-23 | Apparatus for preventing nozzle clogging |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020150185009A KR101789571B1 (en) | 2015-12-23 | 2015-12-23 | Apparatus for preventing nozzle clogging |
Publications (2)
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KR20170075400A KR20170075400A (en) | 2017-07-03 |
KR101789571B1 true KR101789571B1 (en) | 2017-10-25 |
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KR1020150185009A KR101789571B1 (en) | 2015-12-23 | 2015-12-23 | Apparatus for preventing nozzle clogging |
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Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4351502B2 (en) * | 2003-09-02 | 2009-10-28 | 新日本製鐵株式会社 | Electromagnetic casting apparatus and electromagnetic casting method |
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- 2015-12-23 KR KR1020150185009A patent/KR101789571B1/en active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4351502B2 (en) * | 2003-09-02 | 2009-10-28 | 新日本製鐵株式会社 | Electromagnetic casting apparatus and electromagnetic casting method |
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