KR20160131480A - Fixing device for nozzle and continuous casting apparatus - Google Patents

Fixing device for nozzle and continuous casting apparatus Download PDF

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Publication number
KR20160131480A
KR20160131480A KR1020150063948A KR20150063948A KR20160131480A KR 20160131480 A KR20160131480 A KR 20160131480A KR 1020150063948 A KR1020150063948 A KR 1020150063948A KR 20150063948 A KR20150063948 A KR 20150063948A KR 20160131480 A KR20160131480 A KR 20160131480A
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KR
South Korea
Prior art keywords
nozzle
fixing device
tundish
fastening
nozzle fixing
Prior art date
Application number
KR1020150063948A
Other languages
Korean (ko)
Inventor
오창석
Original Assignee
주식회사 포스코
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Priority to KR1020150063948A priority Critical patent/KR20160131480A/en
Publication of KR20160131480A publication Critical patent/KR20160131480A/en

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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
    • B22D11/103—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
    • B22D41/502—Connection arrangements; Sealing means therefor
    • 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
    • B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

The present invention relates to a nozzle fixing device, and a continuous casting apparatus using the same. The nozzle fixing device comprises: a container having a fastening protrusion; and a nozzle fixing device having a fastening groove rotatably coupled to the fastening protrusion. The nozzle fixing device fixating a nozzle can be firmly fixated to the container such as a ladle or a tundish.

Description

[0001] The present invention relates to a nozzle fixing apparatus and a continuous casting apparatus having the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle fixing device and a continuous casting device having the nozzle fixing device, and more particularly, to a nozzle fixing device capable of suppressing deformation or deviation and a continuous casting device having the nozzle fixing device.

The continuous casting process is a process in which a ladle containing refined molten steel is placed in a continuous casting machine, and the molten steel in a liquid state is changed from a ladle to a tundish to a mold, . At this time, in order to supply molten steel from the tundish to the mold, an immersion nozzle is provided in the tundish, and a well block is provided at the bottom of the tundish to fix the immersion nozzle to the tundish.

Generally, the well block is formed into a hollow cylindrical shape in which a space is formed at the central portion, and is inserted in the periphery of the discharge port formed on the bottom surface of the tundish. The immersion nozzle may be inserted into the insertion hole formed at the center of the well block and installed in the tundish.

On the other hand, when the tundish is preheated for continuous casting, the tundish is preheated while the head of the stopper is in contact with the upper opening of the immersion nozzle, that is, the inlet of the tundish. In order to prevent oxidation of the stopper, The immersion nozzle and the stopper can be fusion-bonded.

If the curing time is not sufficient after repairing the refractory of the tundish, the water contained in the refractory is condensed on the surface of the stopper to generate condensed water, and the condensed water flows on the stopper and becomes solid at the contact portion of the immersion nozzle and the stopper head. The condensed water dissolves the water-soluble water-based water component contained in the antioxidant applied to the surface of the stopper, and the water-based water component becomes solid at the contact portion between the immersion nozzle and the stopper head. Respectively.

However, in such a situation, when the stopper is raised for continuous casting, the immersion nozzle rises with the stopper, and the well block, which fixes the immersion nozzle, flows or departs from the fixed position and a space is formed between the well block and the tundish, There is a problem that a molten steel leakage accident may occur.

KR 2010-0034070A KR 10-0707659B

The present invention provides a nozzle fixing apparatus and a continuous casting apparatus having the nozzle fixing apparatus capable of suppressing a flow or a deviation from being caused by an external impact.

The present invention provides a nozzle fixing apparatus capable of stably performing a process and a continuous casting apparatus having the same.

A nozzle fixing apparatus according to an embodiment of the present invention is a device for fixing a nozzle for discharging a fluid contained in a container, the nozzle fixing apparatus including a body having an insertion port into which the nozzle is inserted, An inclined surface formed to be inclined downward toward the inside of the body, and a fastening groove for fixing the container to the body may be formed.

The inclined surface may be formed in a range of 1/2 from the bottom with respect to the vertical length of the body.

The fastening groove may be formed on the lower surface and the outer peripheral surface of the body.

The fastening groove may be formed such that the length of the upper side in the circumferential direction is longer than the length of the lower side.

The fastening groove may be formed in a vertical direction on an outer peripheral surface of the body, and the fastening groove may include a vertical portion formed in a vertical direction from a lower portion of the body and a horizontal portion extending from the upper portion of the vertical portion.

A continuous casting apparatus according to an embodiment of the present invention includes: a container in which a fastening protrusion is formed; And a nozzle fixing device in which a coupling groove for rotationally coupling with the coupling protrusion is formed.

Wherein the nozzle fixing device includes a body formed with an insertion port into which the nozzle is inserted, at least a part of an outer circumferential surface of the body is formed with an inclined surface inclined downward toward the inside of the body, Can be formed.

The inclined surface may be formed in a range of 1/2 from the bottom with respect to the vertical length of the body.

The fastening groove may be formed on the lower surface and the outer peripheral surface of the body.

The fastening groove may be formed such that the length of the upper side in the circumferential direction is longer than the length of the lower side.

The container may include a metal foil forming an outer shape and a refractory provided inside the metal foil, and the coupling protrusion may be formed in the metal foil.

The coupling groove is formed in a vertical direction on an outer circumferential surface of the body. The coupling groove includes a vertical portion formed in a vertical direction from a lower portion of the body, and a horizontal portion extending from the upper portion of the vertical portion to the coupling protrusion .

The container may include a metal foil forming an outer shape and a refractory provided inside the metal foil, and the coupling protrusion may be formed in the refractory.

The nozzle fixing apparatus and the continuous casting apparatus having the nozzle fixing apparatus according to the present invention can firmly fix the nozzle fixing apparatus for fixing the nozzle to a container such as a ladle or a tundish. That is, a fastening protrusion is formed in the ladle or the tundish in which the nozzle fastening device is installed, and the fastening protrusion is received in the nozzle fastening device, so that the fastening protrusion and the fastening groove can be rotationally coupled. Therefore, it is possible to suppress or prevent the phenomenon that the nozzle fixing device is caused to flow or depart from the fixed position by the external force applied to the nozzle fixing device in the vertical direction. As a result, it is possible to prevent a serious accident such as the leakage of molten steel from occurring in advance, thereby stably performing the process.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic illustration of a portion of a continuous casting apparatus according to an embodiment of the present invention.
2 is a perspective view showing a nozzle fixing device (well block) according to an embodiment of the present invention;
3 is a front view, a plan view and a bottom view of the nozzle fixing device shown in Fig.
4 is a view showing a process of installing a nozzle fixing device according to an embodiment of the present invention in a container (tundish);
5 is a sectional view showing a state in which a nozzle fixing device according to an embodiment of the present invention is installed in a container (tundish);
6 is a view showing a nozzle fixing apparatus according to a modification of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. In the description, the same components are denoted by the same reference numerals, and the drawings are partially exaggerated in size to accurately describe the embodiments of the present invention, and the same reference numerals denote the same elements in the drawings.

The present invention relates to a nozzle fixing apparatus for fixing a nozzle by an external impact during a process while firmly fixing a nozzle for supplying a fluid accommodated in a first container to a second container provided at a lower portion of the first container, So as to prevent them from flowing or leaving the first container. Wherein the first vessel may be a ladle or a tundish, the second vessel may be a tundish or a mold, and the nozzle may be a shroud nozzle or an immersion nozzle. Hereinafter, examples in which the first container is a tundish, the second container is a mold, and the immersion nozzle is a nozzle will be described. Further, the fluid may be a molten steel for casting the cast steel, and the nozzle fixing device may be a well block.

FIG. 2 is a perspective view showing a nozzle fixing device (well block) according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view of the continuous casting apparatus according to an embodiment of the present invention, FIG. 4 is a view showing a process of installing a nozzle fixing apparatus according to an embodiment of the present invention in a container (tundish), and FIG. 5 is a view 6 is a view showing a nozzle fixing apparatus according to a modified example of the present invention. FIG. 6 is a sectional view showing a state in which a nozzle fixing apparatus according to an example is installed in a container (tundish).

1, the continuous casting apparatus includes a ladle 10 for receiving molten steel, and a mold 60 provided under the ladle 10 and supplied with molten steel from the ladle 10 and injecting the molten steel into the mold. The molten steel is supplied to the tundish 30 through the long nozzle 20 provided in the ladle 10. The molten steel supplied to the tundish 30 is supplied to the immersion nozzle 40 provided in the tundish 30, (Not shown). A plurality of roll pairs, in which a movement path of the slab S is formed, are provided in the lower portion of the mold 60 to pull out the slab.

The long nozzle 20 and the immersion nozzle 40 are connected to the ladle 10 and the tundish 30 through a nozzle fixing device 50 such as a well block provided in the ladle 10 and the tundish 30, Respectively. Hereinafter, a nozzle fixing device for fixing the immersion nozzle 40 to the tundish 30 will be described.

2, the nozzle fixing device 50 includes a body 52 on which an insertion port 54 into which the immersion nozzle 40 is inserted is formed. At least a part of the outer circumferential surface of the body 52 includes a body 52, And a locking groove 58 for fixing the tundish 30 to the body 52 may be formed on the body 52. [

The body 52 is formed in a substantially cylindrical shape, and an insertion port 54 passing through the body 52 in a vertical direction may be formed at the center. The insertion port 54 may be formed to have a size such that the immersion nozzle 40 can be inserted and closely contact with the outer circumferential surface of the immersion nozzle 40. Usually, the immersion nozzle 40 is formed in a shape of an upper light-blocking shape in which the diameter of the upper portion is decreased toward the lower portion so that the immersion nozzle 40 can be inserted and fixed in the nozzle fixing device 50. The insertion port 54 formed in the body 52 can be formed so that the upper end of the immersion nozzle 40, that is, the portion fixed by the body 52 has a diameter corresponding to the outer diameter of the upper end of the immersion nozzle 40 .

The body 52 is installed at a discharge port formed on the bottom surface of the tundish 30 and is formed to have a height equal to at least the thickness of the refractory 34 constituting the tundish 30, It can be installed to be buried.

The inclined surface 56 formed on the outer circumferential surface of the body 52 may be formed on at least a part of the body 52. The inclined surface 56 can facilitate alignment to the mounting position when the nozzle fixing device 50 is installed in the tundish 30. In addition, the inclined surface 56 facilitates detaching the nozzle fixing device 50 from the tundish 30. 3, the inclined surfaces 56 may be formed to be opposed to each other in the vertical direction, for example, the longitudinal direction of the body 52 at both outer peripheral surfaces of the body 52, Or may be formed on only one of the outer circumferential surfaces.

The inclined surface 56 may extend from the bottom of the body 52 to the entire height of the body 52 when the height of the body 52 is H0 And may be formed in a range H1 of about 1/2. When the inclined surface 56 starts from the top of the body 52, the immersion nozzle 40 can not be sufficiently supported.

The fastening groove 58 may be formed in the lower portion of the body 52 as shown in FIGS. The nozzle fixing device 50 is simply inserted into the insertion groove formed in the tundish 30 in the prior art. In this case, however, when the immersion nozzle 40 and the stopper are fused by the antioxidant applied to the stopper (not shown) and the stopper is raised, the immersion nozzle 40 is raised together with the stopper, and the immersion nozzle 40 There is a problem that the fixed nozzle fixing device 50 flows or departs in the tundish 30. Therefore, in the present invention, the nozzle fixing device 50 is firmly fixed to the tundish 30 by forming the coupling groove 58 for fastening the tundish 30 to the body 52 of the nozzle fixing device 50 . At this time, the tundish 30 may be provided with a fastening protrusion 36 to be fastened to the fastening groove 58, and the fastening protrusion 36 and the fastening groove 58 may be coupled through the rotation of the body 52 have.

First, the fastening protrusion 36 formed on the tundish 30 will be described as follows. At least one fastening protrusion 36 may be formed around the discharge port through which the molten steel is discharged from the bottom surface of the tundish 30. In general, the tundish 30 is composed of a metal foil 32 and a refractory 34 which form an outer shape. The metal tongue 36 may be formed of the same material as the metal foil 32 constituting the tundish 30 have. This can effectively support the nozzle fixing device 50 when the immersion nozzle 40 is lifted because the refractory 34 is weaker than the steel foil 32. The fastening protrusions 36 may be connected to the scallops 32 of the tundishes 30 and 32 by welding or may be integrally formed with the scallops 32 when the scallops 32 are manufactured. The fastening protrusions 36 may be formed in an arc shape that occupies a part of a virtual circle formed on the top of the scallops 32 with respect to the center of the discharge port. The fastening protrusions 36 may be formed to have a predetermined height, width, and thickness, and may be formed in an inverted trapezoidal shape in the form of a superimposed light. Therefore, the upper side width of the fastening protrusion 36 may be longer than the lower side width, and at least one upper side may protrude from the lower side. Here, the height is the length of the fastening protrusion 36 in the vertical direction, the width is the circumferential length with respect to the center of the discharge port, and the thickness is the length from the inside to the outside of the fastening protrusion 36 about the discharge port.

The fastening groove 58 may be formed to be engaged with the fastening protrusion 36 formed on the tundish 30 as described above. At least one fastening groove 58 may be provided at a lower portion of the body 52. The fastening groove 58 may be formed at a lower portion of the body 52 as shown in FIG. The number of the fastening protrusions 36 may be reduced. The fastening groove 58 may be formed to have a predetermined height, depth and width in the edge region of the lower portion of the body 52 to form a space capable of accommodating the fastening protrusion 36 formed in the tundish 30 . The fastening groove 58 may be formed to have a shape corresponding to the shape of the fastening protrusion 36. That is, the fastening groove 58 may be formed to have a shape of a lower light-tight shape, for example, an inverted trapezoidal shape. At this time, the lower side width of the fastening groove 58 may be greater than the upper side width of the fastening protrusion 36 so that the fastening protrusion 36 can be easily inserted.

The fastening protrusions 36 and the fastening recesses 58 are formed to have an upper light-tight shape in order to support the force acting in the vertical direction by fitting the fastening protrusions 58 and the fastening protrusions 36 together.

The nozzle fixing device 50 is inserted and fixed in the upper part of the discharge port formed at the bottom of the tundish 30 and then inserted into the insertion port 54 formed in the body 52 of the nozzle fixing device 50, 40 can be inserted and fixed.

Referring to FIGS. 4 and 5, a discharge port for discharging molten steel is formed at the bottom of the tundish 30. A space in which the nozzle fixing device 50 can be inserted is provided around the discharge port. The nozzle fixing device 50 is inserted downward from the top of the tundish 30 and is formed in the body 52 of the nozzle fixing device 50 and the fastening protrusion 36 formed in the tundish 30 So that the engaging groove 58 is disposed at a corresponding position.

When the body 52 of the nozzle fixing device 50 is inserted into the space around the discharge port, the body 52 is rotated in one direction so that one side of the fastening protrusion 36 and one side of the fastening groove 58 are engaged with each other . At this time, one side of the fastening protrusion 36 and the fastening groove 58 is formed with a protruding shape such as a taper, so that even if the body 52 is pulled upward, the fastening groove 58 and the fastening protrusion 36 The tundish 30 does not come off.

When the nozzle fixing device 50 and the tundish 30 are coupled to each other, the region where the nozzle fixing device 50 and the tundish 30 are coupled is filled with the refractory material, The immersion nozzle 40 is inserted and fixed.

Fig. 6 shows a nozzle fixing device 50 according to a modification of the present invention.

Referring to FIG. 6, the nozzle fixing device 50 has a shape and a forming position different from those of the nozzle fixing device 50 and the fastening groove 58 'shown in FIGS.

The fastening groove 58 'may be formed on the outer circumferential surface of the body 52 in the longitudinal direction of the body 52, that is, in a vertical direction. At this time, the fastening groove 58 'may include a vertical part extending in the vertical direction from the lower part of the body 52 and a horizontal part extending to one side from the upper part of the vertical part. So that the engaging groove 58 'can be formed in a substantially "ㅓ" or "" "shape. In this case, a fastening protrusion 36 'may be formed around the outlet of the tundish 30 to engage with the fastening groove 58', and the fastening protrusion 36 'may be formed on the refractory 34 of the tundish 30, As shown in FIG.

When the nozzle fixing device 50 is inserted into the outlet of the tundish 30 through such a configuration, the nozzle fixing device 50 is inserted into the vertical portion of the coupling groove 58 ' And then moves the fastening protrusion 36 'in the horizontal part of the fastening groove 58' by rotating the fastening protrusion 36 'in a direction in which the horizontal part of the fastening groove 58' is formed. So that the fastening protrusion 36 'is engaged with the horizontal portion of the fastening groove 58' to support the force acting in the vertical direction on the nozzle fixing device 50.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Those skilled in the art will appreciate that various modifications and equivalent embodiments may be possible. Accordingly, the technical scope of the present invention should be defined by the following claims.

10: Ladle 20: Long nozzle
30: Tundish 40: Immersion nozzle
50: nozzle fixing device 60: mold

Claims (9)

An apparatus for fixing a nozzle for discharging a fluid contained in a container,
And a body on which an insertion port for inserting the nozzle is formed,
Wherein at least a part of an outer circumferential surface of the body is formed with an inclined surface inclined downwardly toward the inside of the body, and a fastening groove for fixing the container to the body is formed in the body. The method according to claim 1,
Wherein the inclined surface is formed in a range of 1/2 from the bottom with respect to the vertical length of the body. The method of claim 2,
Wherein the fastening groove is formed on the lower surface and the outer peripheral surface of the body. The method of claim 3,
Wherein the fastening groove has a longer length in the circumferential direction than a length in the lower direction. The method of claim 2,
Wherein the fastening groove is formed in a vertical direction on an outer peripheral surface of the body,
Wherein the fastening groove includes a vertical portion formed in a vertical direction from a lower portion of the body and a horizontal portion extending from the upper portion of the vertical portion to one side. As a continuous casting apparatus,
A container in which a fastening protrusion is formed;
And a nozzle fixing device in which a fastening groove is formed to be rotatable with the fastening protrusion. The method of claim 6,
Wherein the nozzle fixing device is the nozzle fixing device according to any one of claims 1 to 5. The method according to claim 6 or 7,
Wherein the container comprises a metal foil forming an outer shape and a refractory provided inside the metal foil,
And the fastening protrusion is formed on the iron foil. The method according to claim 6 or 7,
Wherein the container comprises a metal foil forming an outer shape and a refractory provided inside the metal foil,
And the fastening protrusions are formed in the refractory.
KR1020150063948A 2015-05-07 2015-05-07 Fixing device for nozzle and continuous casting apparatus KR20160131480A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109482857A (en) * 2018-12-15 2019-03-19 江苏盛耐新材料有限公司 Lower nozzle brick equipped with compound sealing structure
CN114406216A (en) * 2021-12-30 2022-04-29 河北敬业高品钢科技有限公司 Double-roller thin-strip continuous casting flow distributor transition device and construction method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100707659B1 (en) 2001-05-04 2007-04-13 주식회사 포스코 Fixed apparatus of tundish submerged nozzle
KR20100034070A (en) 2008-09-23 2010-04-01 조선내화 주식회사 Well block for molten metal molding

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100707659B1 (en) 2001-05-04 2007-04-13 주식회사 포스코 Fixed apparatus of tundish submerged nozzle
KR20100034070A (en) 2008-09-23 2010-04-01 조선내화 주식회사 Well block for molten metal molding

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109482857A (en) * 2018-12-15 2019-03-19 江苏盛耐新材料有限公司 Lower nozzle brick equipped with compound sealing structure
CN114406216A (en) * 2021-12-30 2022-04-29 河北敬业高品钢科技有限公司 Double-roller thin-strip continuous casting flow distributor transition device and construction method thereof
CN114406216B (en) * 2021-12-30 2024-05-31 河北敬业高品钢科技有限公司 Transition device of double-roller thin-belt continuous casting flow distributor and construction method thereof

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