KR20170014822A - Stopper - Google Patents

Stopper Download PDF

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Publication number
KR20170014822A
KR20170014822A KR1020150108752A KR20150108752A KR20170014822A KR 20170014822 A KR20170014822 A KR 20170014822A KR 1020150108752 A KR1020150108752 A KR 1020150108752A KR 20150108752 A KR20150108752 A KR 20150108752A KR 20170014822 A KR20170014822 A KR 20170014822A
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KR
South Korea
Prior art keywords
nozzle
immersion nozzle
molten steel
stopper
tundish
Prior art date
Application number
KR1020150108752A
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Korean (ko)
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KR101722952B1 (en
Inventor
조현진
한상우
Original Assignee
주식회사 포스코
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Priority to KR1020150108752A priority Critical patent/KR101722952B1/en
Publication of KR20170014822A publication Critical patent/KR20170014822A/en
Application granted granted Critical
Publication of KR101722952B1 publication Critical patent/KR101722952B1/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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
    • B22D41/18—Stopper-rods therefor
    • 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
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
    • B22D41/20—Stopper-rod operating equipment

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

Abstract

The present invention relates to a stopper provided in a container provided with a nozzle for discharging molten steel, wherein the stopper includes at least a body portion extending in the longitudinal direction so as to be inserted into the nozzle and rotated, and a driving portion connected to the body portion to rotate the body portion The inclusion of inclusions can be suppressed or prevented.

Description

Stopper {Stopper}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a stopper, and more particularly to a stopper capable of suppressing or preventing the inclusion of an inclusion.

In general, a continuous casting facility is made up of devices that are produced in a steelmaking furnace, receive molten steel transferred to a ladle on a tundish, and supply the molten steel to a mold to continuously produce a cast steel having a predetermined size. At this time, the molten steel stored in the tundish is supplied to the mold through the immersion nozzle provided at the bottom of the tundish, and the flow rate of the molten steel passing through the immersion nozzle is controlled by a stopper.

However, as the casting process is repeated, the inclusions present in the molten steel can be attached to the head portion of the stopper or the inner wall of the immersion nozzle. Such inclusions may interfere with the flow of molten steel moving in the immersion nozzle to generate bias flow, and impurities may be mixed into the slip to lower the quality of the slab. Further, when the amount of deposition of inclusions increases to accumulate between the stopper and the immersion nozzle, the flow path of the molten steel existing between the stopper and the immersion nozzle and the inside of the immersion nozzle may be blocked to terminate the casting process.

In order to solve this problem, an operator inserts the head portion of the stopper and the molten steel discharge port of the tundish, that is, the inclusions attached to the upper entrance of the immersion nozzle by using a pipe or a jig, However, this has a problem that the load of the worker is increased and the worker is injured and accidents occur.

JP 2004-249338 A JP 2002-011565 A

The present invention provides a stopper capable of suppressing or preventing the adhesion of inclusions.

The present invention provides a stopper capable of restraining or preventing foreign matters from entering into a cast steel.

The present invention relates to a stopper provided in a container provided with a nozzle for discharging molten steel, the stopper comprising: a body portion extending at least in part in the longitudinal direction so as to be inserted into the nozzle and rotate; A driving part connected to the body part to rotate the body part; .

Wherein the body comprises: a first body having a diameter greater than an inner diameter of the nozzle; And a second body connected to a lower portion of the first body and having a diameter smaller than an inner diameter of the nozzle; .

The diameter of the second body is 40% or less of the inner diameter of the nozzle.

The length of the second body is less than or equal to the length of the nozzle.

The connecting portions of the first body and the second body are rounded or tapered.

A gas supply path through which gas moves in the longitudinal direction is formed in the body portion, and a spray hole communicating with the gas supply path is provided in the second body.

And an auxiliary spray hole communicating with the gas supply path is provided at a connection portion between the first body and the second body.

The vessel comprises a tundish for use in a continuous casting plant, the gas comprising argon gas.

At least a portion of the body part is capable of revolving inside the nozzle.

The driving unit includes a tilt adjusting unit connected to the body to adjust a tilt of the body.

The turning radius of the upper end portion and the lower end portion of the body portion are different from each other.

According to the embodiment of the present invention, it is possible to suppress or prevent the inclusion of the inclusion inside the nozzle by rotating the body portion of the stopper. That is, it is possible to prevent the inclusions from adhering to the inner wall of the nozzle by using the rotating flow generated by the rotation of the body portion. Accordingly, it is possible to prevent the occurrence of drift by the inclusions attached to the inner wall of the nozzle, to prevent foreign matter from mixing into the cast steel, and to improve the quality of the cast steel.

Further, by rotating the body portion, it is possible to suppress or prevent the inclusion from being attached to the surface of the body portion. Thus, the life of the body part is prolonged, and maintenance of the apparatus can be facilitated.

1 shows a continuous casting apparatus according to an embodiment of the present invention.
2 is a view showing a body part and an immersion nozzle according to an embodiment of the present invention.
3 is a view showing a structure of a body part according to an embodiment of the present invention.
4 is a view showing a gas supply path according to an embodiment of the present invention;
5 is a view showing a turning radius of a body part according to an embodiment of the present invention;
6 is a view showing the operation of the body part according to the embodiment 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. To illustrate the invention in detail, the drawings may be exaggerated and the same reference numbers refer to the same elements in the figures.

Although the embodiments of the present invention describe the tundish of the continuous casting equipment used in the steel production process by way of example, the scope of application is not limited thereto and can be used in various containers capable of storing the molten steel.

FIG. 1 is a view showing a continuous casting apparatus according to an embodiment of the present invention, FIG. 2 is a view showing a body part and an immersion nozzle according to an embodiment of the present invention, FIG. 3 is a cross- 4 is a view showing a gas supply path according to an embodiment of the present invention, FIG. 5 is a view showing a turning radius of a body part according to an embodiment of the present invention, and FIG. 6 is a view Fig. 7 is a view showing the operation of the body part according to the example.

The stopper 100 according to the embodiment of the present invention includes a body 110 having at least a portion thereof inserted into the nozzle and extending in the longitudinal direction so as to rotate, And a driving part 120 connected to the body part 110 to rotate and lift the body part 110.

First, the continuous casting facility 1000 in which the stopper 100 can be used to understand the present invention will be described. 1, the continuous casting facility 1000 includes a ladle 10, a tundish 20 for receiving and temporarily storing refined molten steel from the ladle 10, a tundish 20 disposed below the tundish 20, A casting mold 30 for solidifying the molten steel discharged from the casting mold 20 into a casting shape, a secondary cooling casting 40 for cooling the casting casted from the casting mold 30 and a tundish 20 And a stopper (100) for controlling the amount of molten steel supplied to the mold (30).

The tundish 20 can be formed in the form of a container having an inner space in which molten steel can be stored. The upper surface of the inner space of the tundish 20 may be covered with a lid. Therefore, the lid can minimize the contact of the molten steel stored in the tundish 20 with the outside, thereby preventing oxidation and solidification. In addition, an immersion nozzle 21 may be provided at a lower portion of the tundish 20 to allow molten steel stored in the inner space to escape.

The immersion nozzle 21 can be formed to extend vertically and form a path through which molten steel moves inside. That is, the lower end of the immersion nozzle 21 is extended toward the inside of the mold 30, and the upper end thereof is connected to the inner space of the tundish 20. An inlet port through which molten steel can be introduced into the tundish 20 may be formed at an upper end of the immersion nozzle 21, and one or more outlets through which molten steel may be discharged may be formed at a lower end thereof. Accordingly, the molten steel stored in the inner space of the tundish 20 may move along the immersion nozzle 21 and be supplied to the mold 30. However, the structure and shape of the tundish 20 and the immersion nozzle 21 are not limited to this, and may vary.

The mold 30 is disposed apart from the lower portion of the tundish 20. The mold 30 has a pair of structurally opposed surfaces opened to form a space in which molten steel supplied from the tundish 20 is accommodated. In addition, a cooling passage (not shown) through which the cooling fluid can move can be formed in the wall surface of the mold 30. Therefore, while the cooling fluid moves along the cooling flow path, molten steel supplied to the mold 30 can be solidified to produce a slab. However, the structure and shape of the mold 30 are not limited to this and may be various.

The secondary cooling bed 40 is disposed on the lower side of the mold 30 and includes a plurality of segment rolls forming a feeding path of the casting. Thus, the main body can be solidified in various shapes and sizes while moving along the transport path formed by the segment rolls.

However, as the casting process is repeated, the inclusions present in the molten steel can be attached to the inner wall of the immersion nozzle 21. Such inclusions may interfere with the flow of molten steel moving in the immersion nozzle 21 to generate a bias flow, and impurities may be mixed into the slab to lower the quality of the slab. In addition, if the amount of the inclusions continuously increases, the inside of the immersion nozzle 21 may be blocked, and the casting process may be interrupted. Accordingly, the tundish 100 according to the embodiment of the present invention can be provided on the tundish 20 to suppress or prevent the inclusion of the inclusions on the immersion nozzle 21.

2, the stopper 100 is a stopper provided in a container provided with an immersion nozzle 21 for discharging molten steel. At least a part of the stopper 100 is inserted in the immersion nozzle 21 and is extended in the longitudinal direction A body 110 and a driving unit 120 connected to the body 110 to rotate and lift the body 110. At this time, the container may be a tundish 20 used in a continuous casting facility, and the nozzle may be an immersion nozzle 21.

The body 110 may extend in the longitudinal direction, that is, up and down, and may be formed into a circular rod shape corresponding to the plane shape of the inlet port of the immersion nozzle 21. [ Accordingly, it is possible to open or close the inlet port while moving the body part 110 up and down, or to control the discharge amount of the molten steel supplied to the mold 30. The body 110 has a first body 111 whose diameter is equal to or greater than the inner diameter of the immersion nozzle 21 and a second body 111 which is connected to the lower portion of the first body 111 and whose diameter is smaller than the inner diameter of the immersion nozzle 21 And a second body 112 formed to be smaller than the first body 112.

The first body 111 extends vertically and has an inner diameter D 3 of the immersion nozzle 21 or a diameter D 1 which is equal to or greater than the diameter of the inlet port so as to open and close the inlet port of the immersion nozzle 21 . The upper end of the first body 111 may be connected to the driving unit 120 to move up and down or rotate. However, the structure and the shape of the first body 111 are not limited thereto and may be various.

The second body 112 is connected to the lower end of the first body 111 and extends in the vertical direction. The second body 112 has an inner diameter D 3 of the immersion nozzle 21 or a diameter D 2 smaller than the diameter of the inlet. The second body 112 can be inserted into the movement path of the molten steel formed inside the immersion nozzle 21 and can rotate along the inner circumference of the immersion nozzle 21 in the immersion nozzle 21.

The diameter D2 of the second body 112 may be 5% to 40% of the inner diameter D3 of the immersion nozzle 21. [ That is, if the diameter D 2 of the second body 112 is less than 5% of the inner diameter D 3 of the immersion nozzle 21, the second body 112 may be too thin and durability may be weakened. Therefore, the second body 112 can be easily broken or broken even in a small impact.

On the contrary, if the diameter D 2 of the second body 112 exceeds 40% of the inner diameter D 3 of the immersion nozzle 21, the second body 112 is too thick to flow into the immersion nozzle 21, The flow of molten steel moving in the nozzle 21 can be prevented. Accordingly, the molten steel can not be supplied stably to the mold 30, which may reduce the efficiency of the process. The diameter D 2 of the second body 112 is not less than 5% and not more than 40% of the inner diameter D 3 of the immersion nozzle 21 so that the second body 112 has sufficient durability and does not interfere with the flow of molten steel. % ≪ / RTI >

The vertical length L 1 of the second body 112 may be 15% to 100% of the vertical length L 2 of the immersion nozzle 21. That is, the length of the second body 112 (L 1) is less than 1% of the length (L 2) of the immersion nozzle 21 can be a too short length (L 1) of the second body (112). Accordingly, even if the second body 112 rotates in the immersion nozzle 21, the rotation flow can not be stably generated around the inner wall of the immersion nozzle 21, thereby suppressing or preventing the inclusion of the inclusion in the immersion nozzle 21 I can not.

In contrast, the the length (L 1) of the second body 112 is too long when the length of the second body 112 (L 1) exceeds the length compared to 100% (L 2) of the immersion nozzle 21. Therefore, the second body 112 can contact the molten steel in the mold 30 through the immersion nozzle 21, and it becomes difficult to control the level of the molten steel in the mold 30. The length L 1 of the second body 112 is set to be greater than the length L 1 of the immersion nozzle 21 so that the second body 112 generates stable rotational flow inside the immersion nozzle 21 and does not contact the molten steel in the mold 30. [ ) To 15% or more and 100% or less of the length (L 2 ). That is, the length L 1 of the second body 112 is less than the length L 2 of the immersion nozzle 21. However, the structure and shape of the second body 112 are not limited to the above, and may vary.

Since the first body 111 and the second body 112 have different diameters, a step may be formed in the connection part 113 between the first body 111 and the second body 112. Such a step may be broken by colliding with the molten steel flowing into the inlet of the immersion nozzle 21, and it may interfere with the flow of molten steel. Accordingly, the connection portions 113 of the first body 111 and the second body 112 can be rounded or tapered to remove the step.

For example, the connection portion 113 may be rounded and formed to be convex or concave. When the connecting portion 113 is formed to be convex as shown in FIG. 3 (a), the step that collides with the molten steel is removed, so that the connecting portion 113 is prevented from being damaged by the molten steel. Accordingly, the service life of the body 110 is prolonged, and maintenance of the equipment can be facilitated.

3 (b), molten steel in contact with the connection portion 113 may be guided to the inlet of the immersion nozzle 21 while moving downward along the surface of the connection portion 113 . Accordingly, the connection portion 113 smoothly flows the molten steel, so that the molten steel in the tundish 20 can be stably moved to the immersion nozzle 21, and the service life of the body portion 110 can be extended.

In addition, as shown in FIG. 3 (c), the connecting portion 113 may be tapered so that the connecting portion 113 has an inclined surface. Accordingly, the molten steel in contact with the connecting portion 113 can be moved to the lower side along the inclined surface and can be guided to the inlet of the immersion nozzle 21. Accordingly, the flow of molten steel flowing into the immersion nozzle 21 in the tundish 20 can be smooth and the service life of the body 110 can be extended.

Referring to FIG. 4A, a gas supply path 114 in which gas moves in the longitudinal direction, that is, a vertical direction, may be formed in the body 110, and a gas supply path (not shown) may be formed in the second body 112 One or a plurality of injection holes 112a communicating with the injection holes 114 may be provided. When a plurality of injection holes 112a are provided, the injection holes 112a may be disposed along the circumference of the second body 112. [

The gas supply path 114 is connected to a gas supply unit (not shown). The gas supply unit includes a gas supply disposed outside the tundish 20 and supplying gas, and a gas pipe forming a path through which the gas moves, one end of which is connected to the gas supplier and the other end is connected to the gas supply path . When gas is supplied from the gas supply unit, the gas is supplied to the gas supply path 114 through the gas piping, and may be injected outside the body part 110 through the injection hole 112a.

The gas may be an inert gas. For example, argon gas can be used as an inert gas. The inert gas acts to suppress or prevent the inclusion of the inclusion on the outer surface of the second body 112. Accordingly, the injection hole 112a can be provided at the lower end portion where the inclusion of the second body 112 is easy to attach.

4 (b), the connection portion 113 of the first body 111 and the second body 112 may be connected to one or the other of the gas supply passages 114 in addition to the lower end of the second body 112. [ A plurality of sub-injection holes 113a may be provided. When a plurality of sub-injection holes 113a are provided, the sub-injection holes 113a may be disposed along the periphery of the connection portion 113. [ In other words, since the inclined portion of the molten steel can be easily attached to the connecting portion 113 at a portion where the width of the first body 111 is changed from the second body 112 to the connecting portion 113, inert gas is injected into the connecting portion 113, And an auxiliary spray hole 113a for suppressing or preventing the spray nozzle 113a.

The driving part 120 is connected to the body part 110 to lift and rotate the body part 110. The driving unit 120 includes an elevation member extending in the vertical direction and connected to the body 110 or the upper end of the first body 111. The driving unit 120 is extended in the left and right direction crossing the vertical direction, (Not shown) that rotates the body 110, a lifting / lowering actuator that is disposed outside the tundish 20 and is connected to the other end of the connecting member, and a rotation driver (not shown) that rotates the body 110.

The elevating actuator can be a cylinder whose upper end moves up and down in the vertical direction, and can move the connecting member up and down. Accordingly, when the operation of the elevation driver is controlled, the connecting member, the elevating member connected to the connecting member, and the body 110 connected to the elevating member can move up and down together. Therefore, by adjusting the vertical position of the body 110, the amount of molten steel discharged to the mold 30 from the tundish 20 can be controlled.

That is, when the body 110 moves downward, the space between the body 110 and the inlet of the immersion nozzle 21 becomes narrow. Accordingly, the flow of molten steel is reduced, and the amount of molten steel supplied to the mold 30 can be reduced. In addition, when the body 110 is moved downward as much as possible, the body 110 can close the inlet of the immersion nozzle 21 and stop supplying molten steel to the mold 30.

Conversely, when the body 110 is moved upward, the space between the body 110 and the inlet of the immersion nozzle 21 is widened. Accordingly, the molten steel can flow smoothly into the inlet, and the amount of molten steel supplied to the mold 30 can be increased. However, the method of moving the body part 110 up and down is not limited to this and may be various.

The rotary actuator may be connected to the elevating actuator or may be provided between the elevating member and the connecting member. That is, the rotation driver indirectly rotates the body 110 by adjusting the position of the lifting / lowering actuator, or may rotate the body 110 directly. At this time, the rotation of the body part 110 is performed by rotating at least part of the body part 110, that is, the rotation of the body part 110 along the inner periphery of the immersion nozzle 21 in a state where the second body 112 is inserted into the immersion nozzle 21 . That is, as shown in FIG. 5, the second body 112 may be a rotation that revolves the body 110 in a clockwise or counterclockwise direction with respect to an outer axis, that is, a vertical axis of the immersion nozzle 20.

Therefore, when the second body 112 revolves in the immersion nozzle 21, a rotating or rotating air flow is generated in the immersion nozzle 21 to suppress or prevent the inclusion of the inclusion on the inner wall of the immersion nozzle 21 have. However, the method of rotating the body part 110 is not limited to this and may be various. Also, the body 110 may be rotated by moving the center axis of the body 110 in a circular shape while rotating the center axis of the body 110. Accordingly, a stronger rotational flow is generated in the immersion nozzle 21, so that the adhesion of inclusions can be more easily suppressed or prevented.

The driving unit 120 may include a tilt adjusting unit (not shown) connected to the body 110 to adjust the tilt of the body 110. 6 (a), the body 110 can be revolved in a state of being perpendicular to the bottom surface of the tundish 20, and when the inclination of the body 110 is inclined and rotated, The turning radius of the upper end portion and the lower end portion of the lower end portion may be different from each other.

For example, when the lower end of the body 110 is inclined toward the inner wall of the immersion nozzle 21 as shown in FIG. 6 (b), the radius of rotation of the lower end may be larger than the radius of rotation of the upper end. Accordingly, it is possible to suppress or prevent the inclusion of the inclusion on the inner wall of the immersion nozzle 21 while rotating the body 110 in a conical shape.

Conversely, when the lower end of the body 110 is tilted toward the center of the immersion nozzle 21 as shown in FIG. 6 (c), the radius of rotation of the lower end can be made smaller than the upper end. Accordingly, it is possible to suppress or prevent the inclusion of the inclusion on the inner wall of the immersion nozzle 21 while rotating the body part 110 in a whirling manner. In addition, the molten steel can be smoothly moved from the upper part to the lower part by generating a whirl-shaped flow. Accordingly, when the inclination of the body 110 is adjusted and rotated, the flow of the molten steel can be controlled. However, the structure of the driving part 120 and the method of rotating the body part 110 are not limited to these and may vary.

In this way, it is possible to suppress or prevent the inclusion of the inclusion inside the immersion nozzle 21 by rotating the body 110 of the stopper 100. That is, it is possible to prevent the inclusions from adhering to the inner wall of the immersion nozzle 21 by using the rotational flow generated by the rotation of the body part 110. Therefore, it is possible to prevent the occurrence of drift by the inclusions attached to the inner wall of the immersion nozzle (21), to prevent foreign matter from mixing into the cast steel, and to improve the quality of the cast steel.

In addition, by rotating the body 110, it is possible to suppress or prevent the inclusion from being attached to the surface of the body 110 as well. Accordingly, the service life of the body 110 is extended, and maintenance of the apparatus can be facilitated.

Hereinafter, the operation of the stopper 100 according to the embodiment of the present invention will be described.

When the molten steel is supplied into the tundish 20, the body 110 of the stopper 100 rises by the driving part to open the inflow port of the submerged nozzle 21 at the bottom. Then, molten steel can be transferred to the immersion nozzle 21 through the inlet and supplied to the mold 30. When a certain amount of molten steel is supplied to the mold 30, the level of the mold surface of the mold 30 can be raised. When the level sensor (not shown) detects the position of the bath surface of the mold 30 and controls the driving part 120 according to the measured value of the level sensor 40 to control the vertical position of the body part 110, It is possible to control the supply amount of molten steel to be supplied to the molten steel 30.

However, molten steel or inclusions in the tundish 20 can be attached to the inner wall of the descending body 110 or the immersion nozzle 21. Therefore, the body portion 110 can be revolved to suppress or prevent the attachment of inclusions.

That is, when the second body 112 of the body part 110 is inserted into the immersion nozzle 21, the body part 110 is positioned on the inner periphery of the immersion nozzle 21 with respect to the center of the immersion nozzle 21 It is possible to rotate it. Accordingly, it is possible to prevent the inclusion of the inclusion in the molten steel from adhering to the inner wall of the immersion nozzle 21 by causing the body 110 to rotate in the immersion nozzle 21. Accordingly, the inclusions attached to the inner wall of the immersion nozzle 21 cause a drift, thereby preventing foreign matter from entering the cast steel, and improving the quality of the cast steel.

In addition, by rotating the body 110, it is possible to suppress or prevent the inclusion from being attached to the surface of the body 110 as well. Accordingly, the service life of the body 110 is extended, and maintenance of the apparatus can be facilitated.

Although the stoppers provided in the tundish have been described above by way of example, the scope of application is not limited thereto and can be used in various containers capable of storing molten steel.

Although the present invention has been described in detail with reference to the specific embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be defined by the appended claims, as well as the appended claims.

10: Ladle 20: Tundish
30: mold 40: secondary cooling zone
100: stopper 110:
111: first body 112: second body
113: connection part 120:

Claims (11)

A stopper provided in a container provided with a nozzle for discharging molten steel,
At least a portion of which is inserted into the nozzle and extends in the longitudinal direction so as to rotate;
A driving part connected to the body part to rotate the body part; Stopper included. The method according to claim 1,
The body part
A first body having a diameter larger than an inner diameter of the nozzle; And
A second body connected to a lower portion of the first body and having a diameter smaller than an inner diameter of the nozzle; Stopper included. The method of claim 2,
Wherein the diameter of the second body is 40% or less of the inner diameter of the nozzle. The method of claim 2,
And the length of the second body is equal to or less than the length of the nozzle. The method according to any one of claims 2 to 4,
Wherein the connecting portion of the first body and the second body is rounded or tapered. The method according to any one of claims 2 to 4,
A gas supply path through which gas moves in the longitudinal direction is formed inside the body portion,
Wherein the second body is provided with a spray hole communicating with the gas supply path. The method of claim 6,
And a subsidiary spray hole communicating with the gas supply path is provided at a connecting portion of the first body and the second body. The method of claim 6,
The container comprising a tundish used in a continuous casting installation, the gas comprising argon gas. The method according to any one of claims 1 to 4,
Wherein at least a part of the body is capable of revolving inside the nozzle. The method of claim 9,
Wherein the driving unit includes a tilt adjusting unit connected to the body to adjust a tilt of the body. The method of claim 10,
And stoppers having different radii of rotation at the upper and lower ends of the body portion.
KR1020150108752A 2015-07-31 2015-07-31 Stopper KR101722952B1 (en)

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Application Number Priority Date Filing Date Title
KR1020150108752A KR101722952B1 (en) 2015-07-31 2015-07-31 Stopper

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Application Number Priority Date Filing Date Title
KR1020150108752A KR101722952B1 (en) 2015-07-31 2015-07-31 Stopper

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KR20170014822A true KR20170014822A (en) 2017-02-08
KR101722952B1 KR101722952B1 (en) 2017-04-04

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002011565A (en) 2000-06-27 2002-01-15 Akechi Ceramics Co Ltd Long stopper for continuous casting
JP2004249338A (en) 2003-02-21 2004-09-09 Nippon Steel Corp Continuous casting facility and its operating method
KR20130107792A (en) * 2012-03-23 2013-10-02 주식회사 포스코 Continuous casting equipment and the method thereof
KR20150041953A (en) * 2013-10-10 2015-04-20 주식회사 포스코 Stopper

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002011565A (en) 2000-06-27 2002-01-15 Akechi Ceramics Co Ltd Long stopper for continuous casting
JP2004249338A (en) 2003-02-21 2004-09-09 Nippon Steel Corp Continuous casting facility and its operating method
KR20130107792A (en) * 2012-03-23 2013-10-02 주식회사 포스코 Continuous casting equipment and the method thereof
KR20150041953A (en) * 2013-10-10 2015-04-20 주식회사 포스코 Stopper

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