KR102010071B1 - Segregation disappearing unit and continuous casting apparatus having thereof - Google Patents

Abstract

The segregation removal unit according to an embodiment of the present invention is coupled to the holding member and the holding member provided on a path through which the cast steel is formed by solidifying at least a part of the molten steel, and inserted into the cast steel to friction stir the inside of the cast steel. It may include a rotary stirring member.
In addition, the continuous casting apparatus according to another embodiment of the present invention is provided on the mold unit for receiving the molten steel from the tundish and discharging at least a portion of the molten steel to the solidified cast piece and the cast path discharged from the mold unit It may include the segregation removal unit.

Description

Segregation disappearing unit and continuous casting apparatus having same

The present invention relates to a segregation removal unit and a continuous casting apparatus including the same.

In general, the continuous casting process continuously injects molten steel into the mold and continuously draws molten steel that is semi-solidified in the mold to the lower side of the mold, thereby casting slabs of various shapes such as slabs, blooms, billets, beam blanks, and the like. It is a process of manufacturing.

At this time, the cast slab produced through the playing process will have a segregation zone in the center of the cast steel, which directly affects the performance, such as toughness and strength of the product after rolling.

Accordingly, the cast steel can improve the quality of the final cast product through a process of removing segregation generated in the cast steel.

Previously, in order to reduce the center segregation zone of the cast slab, the segregation zone was reduced by applying the step down technique. However, it is impossible to completely remove the center segregation zone through this method, and the wear life of the rolling rolls increases due to the application of the drop-down rate, which reduces the service life of the rolls. There is this.

In addition, the conventional technique of removing the center segregation zone through electronic stirring is only possible for the removal of the segregation zone from the molten steel before the molten steel is completely solidified, and it is difficult to remove the segregation zone by stirring in the state where the molten steel is solidified. There is a limit.

Therefore, in order to overcome the above problems or limitations, a study on the segregation removal unit and the continuous casting apparatus including the same has been required.

Japanese application number 2009-025593

It is an object of the present invention to provide a segregation removal unit capable of removing central segregation of a cast steel and a continuous casting device including the same.

In another aspect, the present invention is not limited to the electronic rolling in the molten steel by performing a pressure drop on the cast steel, or segregation removal unit capable of removing segregation of the cast steel and continuous casting comprising the same It is an object to provide a device.

The segregation removal unit according to an embodiment of the present invention is coupled to the holding member and the holding member provided on a path through which the cast steel is formed by solidifying at least a part of the molten steel, and inserted into the cast steel to friction stir the inside of the cast steel. Includes a rotating stirring member, the rotating stirring member is supported in connection with the holding member, the rotary motor unit for providing a rotational driving force, coupled to the rotary motor unit receives a rotational driving force, the stirring is inserted into the cast An up-and-down driving part coupled to a tool part, the holding member, and one end of the rotary motor part coupled to one end of the stretchable part, and one end connected to the other end of the rotary motor part opposite to the one end of the rotary motor part, the other end of the It is provided to surround the stirring tool portion, even if a portion of the stirring tool portion is inserted into the cast steel elastically on the outer surface of the cast steel It may be in close contact with the tool support for supporting at least a portion of the stirring tool.

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And, the tool support portion of the segregation removal unit according to an embodiment of the present invention, the shanghai copper tube into which at least a portion of the rotary motor portion is inserted, so as to be caught by a stopper protruding laterally from the lower end of the rotary motor portion, the shanghai copper tube The engaging ring is formed to protrude into the upper end of the upper portion of the shanghai copper tube is formed to protrude into the inner side, the support ring is formed to extend adjacent to the outer surface of the stirring tool and provided between the support ring and the lower end of the rotary motor portion And, the stirring tool may include an extended elastic body for providing an elastic force for pressing the support ring in the extending direction.

In addition, the stirring tool portion of the segregation removal unit according to an embodiment of the present invention, provided in an inverted triangular pyramid shape that is wider from the coupling end coupled to the rotary motor to the contact end adjacent to the slab than the coupling end It may be characterized by.

In addition, the stirring tool of the segregation removal unit according to an embodiment of the present invention is provided in a cylindrical shape having a constant width between the coupling end coupled to the rotary motor portion and the contact end adjacent to the slab than the coupling end, The contact end may be characterized in that the wing tab is formed to extend outwardly inclined.

And, the stirring tool of the segregation removal unit according to an embodiment of the present invention, is inserted in the thickness direction of the cast steel, it may be characterized in that inserted into a depth of at least 30% or more of the thickness of the cast steel.

In addition, the rotary stirring member of the segregation removal unit according to an embodiment of the present invention, the main tool line formed a plurality of the stirring tool portion on the line in the slab width direction, the main tool line is the main tool line A pair is provided adjacent to each other in the direction of convenience movement, the stirring tool portion disposed in any one of the main tool line and the stirring tool portion disposed in the other main tool line may be alternately arranged in the movement direction of the cast piece. .

And, the rotary stirring member of the segregation removal unit according to an embodiment of the present invention, forms a sub tool line arranged a plurality of the stirring tool portion on the line in the slab width direction, the sub tool line is the main It may be characterized in that the stirring tool portion provided downstream of the moving direction of the slab than the tool line, the stirring tool portion forming the sub tool line is driven when the stirring tool portion forming the main tool line is stopped.

Continuous casting apparatus according to another embodiment of the present invention receives the molten steel from the tundish at least a portion of the molten steel and the segregation is provided on the movement path of the cast unit discharged from the mold unit It may include a removal unit.

The segregation removal unit of the present invention and the continuous casting apparatus including the same have the effect of removing the segregation of the central portion of the cast steel.

As a result, the quality of the steel sheet product can be improved by reducing the segregation zone of the center of the cast steel, and also the defects such as pores and the like existing in the cast steel can be removed by frictional stirring due to the high-speed rotation in the cast steel. There is an effect that can be improved.

In another aspect, the segregation removal unit of the present invention and the continuous casting apparatus including the same is not limited to the electronic stirring in the molten steel by performing a pressure drop on the cast steel, or to remove the segregation of the cast steel There is an advantage to this.

However, various and advantageous advantages and effects of the present invention are not limited to the above description, and will be more readily understood in the course of describing specific embodiments of the present invention.

1 is a side view showing a continuous casting apparatus of the present invention.
Figure 2 is a front view showing the segregation removal unit of the present invention.
Figure 3 is a cross-sectional view showing a tool support portion in the segregation removal unit of the present invention.
Figure 4 is a front view showing embodiments of the stirring tool in the segregation removal unit of the present invention.
5 is a plan view showing an arrangement state of the stirring tool in the segregation removal unit of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. In addition, the embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. Shape and size of the elements in the drawings may be exaggerated for more clear description.

Also, in the present specification, the singular forms "a", "an" and "the" are intended to include the plural expressions unless the context clearly dictates otherwise. Like reference numerals refer to the same or corresponding elements throughout the specification. I shall do it.

The present invention relates to a segregation removal unit (1) and a continuous casting apparatus including the same, it is possible to remove the central segregation of the cast steel 4, accordingly, the steel sheet product through the reduction of the central segregation of the cast steel (4) The quality of the steel sheet product can be improved by eliminating defects such as pores existing in the cast steel 4 by frictional stirring by high-speed rotation in the cast steel 4.

In another aspect, the segregation removal unit (1) of the present invention and the continuous casting apparatus including the same is not limited to the electronic roll in the molten steel to perform a pressure drop on the slab (4), or to reduce the load, Segregation of the cast steel 4 can be removed. That is, the problem of rolling roll abrasion and damage due to the falling down of the rolling rolls can be prevented in that the slab 4 is not removed by the lowering of the slab 4. It is possible to remove the segregation remaining in the solidified portion can be stirred for the solidified portion that is not possible to perform.

Specifically, with reference to the drawings, Figure 1 is a side view showing a continuous casting apparatus of the present invention, referring to the drawing, a continuous casting apparatus according to another embodiment of the present invention is a molten steel in the tundish (3) The segregation removal unit 1 provided on the movement path of the mold unit 2 and the cast unit 4 discharged from the mold unit 2 by discharging at least a portion of the molten steel to the solidified cast (4) It may include.

In this case, the knitting removal unit is inserted into the cast (4) can remove the segregation formed by stirring at least one of the solidified portion and the non-solidified molten steel portion of the cast 4, the mold unit (2) It is possible to prevent the problem that the slab 4 formed from the quality is reduced by segregation.

Here, the mold unit 2 is discharged while forming molten steel in the form of cast steel 4, the discharged cast steel 4 is removed from segregation in the segregation removal unit 1 to the next process such as rolling process Is passed to.

In addition, the mold unit 2 receives molten steel from the tundish 3, and the tundish 3 serves to supply molten steel to the mold unit 2, and receives molten steel from an external ladle. Will be supplied.

Thus, the slab 4 which is partially solidified and discharged from the mold unit 2 is transferred to the next process such as the segregation removal unit 1 by the guide roll R, and the guide roll R is the slab 4. Guide in the vertical, bending, and horizontal portion of the), and guides the path where the mold is completely solidified.

The segregation removal unit 1 is inserted into the slab 4 and serves to remove segregation formed by stirring at least one of the solidified portion and the unsolidified molten steel portion of the slab 4. Detailed description of the unit 1 will be described later with reference to FIGS. 2 to 5.

2 is a front view showing the segregation removal unit 1 of the present invention, referring to the drawing, the segregation removal unit 1 according to an embodiment of the present invention is a cast steel 4 formed by at least partially solidified molten steel It is coupled to the holding member 100 and the holding member 100 provided on the transmission path, and is inserted into the cast (4) includes a rotating stirring member 200 for friction stir the inside of the cast (4) can do.

As such, the segregation removal unit 1 includes the holding member 100 and the rotary stirring member 200, so that the segregation removing unit 1 is inserted into the cast steel 4 and the solidified portion of the cast steel 4 and the unsolidified molten steel portion. The segregation formed by stirring at least one can be removed.

The holding member 100 serves to support the rotary stirring member 200. Here, the holding member 100 supports the rotary stirring member 200 while the rotary stirring member 200 is segregated in the cast steel 4 by friction stirring inside the cast steel 4 with respect to the cast steel 4. It is arranged in the delivery path of the cast 4, to eliminate the. As such, the holding member 100 is disposed on the traveling path of the cast steel 4, and, for example, partially solidified and discharged from the mold unit 2 to be stirred internally with respect to the cast steel 4 having uncoagulated molten steel at its center. Forming of segregation may be prevented, and even when the inside of the cast steel 4 is solidified, the rotary stirring member 200 may be inserted into the cast steel 4 to remove segregation by stirring.

The rotary stirring member 200 serves to remove segregation formed in the cast steel 4 by friction stirring the inside of the cast steel 4.

To this end, the rotary stirring member 200 may include a rotary motor unit 210, a stirring tool unit 220 and the like. That is, the rotary stirring member 200 of the segregation removal unit 1 according to an embodiment of the present invention is supported in conjunction with the holding member 100, the rotary motor unit 210 to provide a rotational driving force and It is coupled to the rotary motor portion 210 receives a rotational driving force, it may include a stirring tool 220 is inserted into the cast (4).

The stirring tool 220 is inserted into the cast steel 4 and rotates to remove segregation inside the cast steel 4. To this end, the stirring tool unit 220 is connected to the rotary motor unit 210 to receive a rotational force. In addition, the stirring tool 220 is moved up and down by the vertical drive unit 230 to be described later in order to move to the inside of the cast (4).

In addition, the stirring tool 220 is inserted into the cast steel 4 to increase the effect of friction stirring of the solidified portion and the non-solidified portion inside the cast steel 4, coupled to the rotary motor portion 210 The shape may be provided in an inverted triangular pyramid shape or a cylindrical shape, which will be described later with reference to FIG. 4.

And, the stirring tool 220 is provided with a plurality, it is arranged in the width direction (y) and the like of the cast 4 to perform segregation removal on the cast 4, wherein the stirring tool 220 Can be staggered so that the regions of segregation removal are formed in the entire region of the cast piece 4. Detailed description thereof will be described later with reference to FIG. 5.

In addition, the stirring tool 220 is a main tool line (ML) that serves to remove the segregation as a main and a sub tool line that serves to remove the segregation when stopped due to failure of the main tool line (ML), etc. It may be disposed in the (SL), a detailed description thereof will be described later with reference to FIG.

The rotary motor unit 210 serves to rotate the stirring tool 220. In addition, the rotating motor unit 210 is coupled to the holding member 100 via the upper and lower driving unit 230, and the like, and thus the stirring tool 220 is also the upper and lower driving unit 230 or the holding member. Coupled to (100).

Therefore, the stirring tool part 220 coupled to the rotary motor part 210 is also disposed on the movement path of the cast piece 4, whereby the stirring tool part 220 is subjected to stirring with respect to the cast piece 4. Segregation can be eliminated.

In addition, when a plurality of stirring tool parts 220 are disposed, the rotating motor part 210 may also be coupled to each of the stirring tool parts 220 to correspond to the number of the stirring tool parts 220. In addition, in order to couple the rotary motor unit 210 to the vertical driving unit 230, the rotary motor unit 210 may be coupled to the connection frame 230a of the vertical driving unit 230. have.

However, the present invention is not limited thereto, and may be provided as one rotation motor unit 210 coupled to a plurality of stirring tool units 220.

In addition, the rotary stirring member 200 of the segregation removal unit 1 according to an embodiment of the present invention is coupled to the holding member 100, the rotary motor portion 210 is coupled to one end of the expansion and contraction It may include a vertical driving unit 230.

The vertical drive unit 230 as described above serves to move the stirring tool 220 to be inserted into the cast steel 4. To this end, the up and down driving unit 230 is coupled to the holding member 100, the rotary motor 210 is coupled, and thus the stirring tool 220, which is coupled to the rotary motor 210, is shanghaidong You can do it.

At this time, the vertical drive unit 230 is driven to insert the stirring tool 220 at least 30% or more of the thickness of the slab 4, the segregation mainly formed in the center of the thickness direction (z) of the slab (4) It can be removed.

That is, the stirring tool portion 220 of the segregation removal unit 1 according to the embodiment of the present invention is inserted in the thickness direction z of the cast steel 4 and at least 30% of the thickness of the cast steel 4. It may be characterized by being inserted at the above depth.

For the vertical movement of the up and down driving unit 230, the up and down driving unit 230 may be provided as a hydraulic or pneumatic cylinder, for example, but not limited to this, if the stirring tool 220 can be moved up and down Up and down driving unit 230 of the present invention can be.

And, the upper and lower driving portion 230 is inserted into the stirring tool 220 to the cast 4 is limited to the length formed of the stirring tool 220, wherein the cast 4 is different in thickness Even in this case, the stirring tool 220 is formed in an elongated form at least half of the thickness of the cast steel 4 so as to remove segregation due to the stirring of the cast steel 4 by adjusting the insertion depth of the stirring tool 220. Can be.

However, when the stirring tool 220 is provided in an elongated shape, the stirring tool 220 is bent due to resistance when the stirring tool 220 comes into contact with the outer surface of the cast steel 4 when the upper and lower driving portions 230 are pressed by the downward movement. Or risk of breakage. In order to prevent the bending or breakage of the stirring tool 220, a tool supporter 240 may be provided around the stirring tool 220, which will be described later with reference to FIG. 3.

3 is a cross-sectional view showing a part of the tool support 240 in the segregation removal unit 1 of the present invention. Referring to the drawings, the rotary stirring member of the segregation removal unit 1 according to an embodiment of the present invention. 200 is connected to the rotary motor 210 to move up and down, the other end is provided to surround the stirring tool 220, the tool support 240 for supporting at least a portion of the stirring tool 220 It may include.

By providing the tool support part 240 in this way, even when the upper and lower driving part 230 is pressed by the downward movement of the bending tool or damage due to the resistance when the stirring tool 220 is in contact with the outer surface of the slab (4) The risk can be prevented.

Here, in order to support the tool supporter 240 while wrapping the stirring tool unit 220, the tool supporter 240 is Shanghai Donggon, a locking ring 242, a support ring 243, an extended elastic body 244, and the like. It may include.

In other words, the tool support portion 240 of the segregation removal unit 1 according to an embodiment of the present invention, the shanghai copper tube 241, at least a portion of the rotary motor unit 210 is inserted, the rotary motor unit ( The engaging ring 242 is formed to protrude into the upper end of the Shanghai Dongguan 241, so as to be caught by the stopper 210a protruding laterally from the lower end of the 210, so as to protrude into the lower end of the Shanghai Dongguan 241. And a support ring 243 formed to extend adjacent to an outer surface of the stirring tool 220 and between the support ring 243 and a lower end of the rotary motor 210, and the stirring tool 220. ) May include an extended elastic body 244 that provides an elastic force to press the support ring 243 in the extending direction.

Thus, in the structure of the tool support part 240, the extension elastic body 244 is provided, and the support ring 243 is configured to be in close contact with the slab 4 by an elastic force, the stirring tool 220 is the slab This is because the tool supporter 240 can maintain the uninserted portion of the stirring tool part 220 even if the distance to the cast piece 4 is changed to (4).

Here, the shanghai copper tube 241 is the body portion of the tool support 240 is the engaging ring 242, the support ring 243 is coupled, the extension elastic body 244 is provided therein.

The shank copper tube 241 is rotated to maintain the support ring 243 in close contact with the slab 4 according to a depth at which the stirring tool 220 is inserted into the slab 4. It is coupled to the motor unit 210, it is coupled in a pipe form to move up and down to the rotary motor unit 210.

That is, the shandong copper tube 241 may be provided in the form of a pipe into which at least a portion of the rotary motor unit 210 is inserted.

The locking ring 242 is configured to limit the movement of the shanghai copper tube 241 to the lower end of the rotary motor unit 210, so that the shanghai copper tube 241 is not separated from the rotary motor unit 210. Will be

To this end, the locking ring 242 is coupled to the upper end of the shandong copper tube 241 is formed in the form of a ring, and caught on the stopper 210a protruding from the lower end of the rotary motor unit 210. . That is, the locking ring 242 is configured to cooperate with the stopper 210a so that the upper end of the shanghai copper tube 241 is not separated from the lower end of the rotary motor 210.

The support ring 243 serves to support the stirring tool 220 by being in close contact with the outer surface of the cast 4 even when the stirring tool 220 is partially inserted into the cast 4. To this end, the support ring 243 is coupled to the lower end of the shandong copper tube 241, it is provided in the form of a ring extending adjacent to the outer surface of the stirring tool 220.

The support ring 243 may further include a support tab in which a portion adjacent to the outer surface of the stirring tool part 220 extends along the outer surface of the stirring tool part 220. In other words, when the support ring 243 supports the stirring tool 220, the support ring 2 may be increased to increase a corresponding area at an edge portion of the support ring 243 adjacent to the outer surface of the stirring tool 220. The support tab may be formed to extend on the inner edge portion of the 243.

The extension elastic body 244 is in close contact with the support ring 243 to the outer surface of the cast 4, when the support ring 243 is a part of the stirring tool 220 is inserted into the cast 4 In addition, it is possible to support the remaining part of the stirring tool 220 disposed on the outside of the cast (4).

That is, when the shanghai copper tube 241 is retracted more than the depth of the stirring tool 220 is inserted into the cast 4, a portion of the stirring tool 220 adjacent to the outer surface of the cast 4 Although not supported by the tool supporter 240, in order to prevent such a problem, the elongated elastic body 244 may be in close contact with the slab 4 to support the support ring 243 provided at the lower end of the shanghai copper tube 241. Is provided on the inside of the Shanghai Dongguan 241.

The extended elastic body 244 may be provided in the form of an expansion spring, for example, and an upper end of the extended elastic body 244 is supported at a lower end of the rotary motor part 210, and a lower end of the extended elastic body 244 is The support ring 243 may be configured to be supported. Accordingly, the support ring 243 coupled to the lower end of the shanghai copper tube 241 may be in close contact with the outer surface of the cast steel (4).

4 is a front view showing embodiments of the stirring tool unit 220 in the segregation removal unit 1 of the present invention. Referring to the drawings, the stirring of the segregation removal unit 1 according to an embodiment of the present invention. The tool 220 has an inverted triangular pyramid shape that becomes wider from the coupling end portion 221 coupled to the rotary motor portion 210 to the contact end portion 222 adjacent to the slab 4 than the coupling end portion 221. It may be characterized in that the provided.

As described above, the stirring tool 220 is inserted into the cast steel 4 so as to increase the effect of friction stirring of the solidified portion and the non-solidified portion inside the cast steel 4. Can be provided in the form of an inverted triangular pyramid.

That is, the stirring tool 220 has a wide end portion of the contact end portion 222, which is a front end portion inserted deeply into the cast piece 4, and a coupling end portion which is a rear end coupled to the rotary motor portion 210 ( 221 is provided in the form of an inverted triangular pyramid narrowly. At this time, since the shear portion inserted most deeply into the inside of the cast steel 4 is formed with the widest width, the effect of removing segregation by stirring inside the cast steel 4 is caused by the largest agitation force by the rotation during stirring. Can increase.

Here, the stirring tool 220 may be provided in the form of an inverted triangular pyramid, the holding member 100 to which the stirring tool 220 is associated with the movement of the slab 4 discharged from the mold unit 2 This is due to the high temperature of the slab 4 as it is provided adjacent to the path. That is, since the slab 4 is provided at a high temperature, the friction high temperature for insertion into the slab 4 can be easily reached, whereby the stirring tool 220 is relatively easy to the slab 4. This is because it can be inserted into the cast (4).

In addition, a screw tab 224 in the form of a screw is formed on the outer surface of the friction tool portion to facilitate the insertion into the cast steel 4 by the rotation of the stirring tool portion 220, and after the insertion into the cast steel 4, It is possible to increase the stirring efficiency.

That is, the crushed or molten cast piece 4 disposed at the insertion portion of the cast piece 4 according to the insertion of the friction tool part moves from the lower part to the upper part along the screw tab 224 and is also moved upward. (4) The portion of the cast piece (4) placed on the upper part by being pushed on the portion is subjected to a cyclical movement from the upper part to the lower part. Thereby, the pulverized or melted part of the upper and lower slabs 4 can be stirred.

In addition, the stirring tool 220 of the segregation removal unit 1 according to an embodiment of the present invention, the slab is coupled to the rotary end portion 210 and the coupling end 221 and the coupling end 221 The width between the contact end portions 222 adjacent to (4) is provided in a constant cylindrical shape, the contact end portion 222 may be characterized in that the wing tab 223 formed to extend outward inclined.

That is, like the inverted triangular pyramid shape described above, the stirring tool 220 is inserted into the cast steel 4 to increase the effect of friction stirring of the solidified portion and the non-solidified portion inside the cast steel 4, the rotation The form coupled to the motor unit 210 may be provided in a cylindrical form.

As described above, the stirring tool 220 is provided in a cylindrical shape, and the content of stirring the slab 4 is the same as the description of the stirring tool 220 having the inverted triangular pyramid shape. That is, the slab 4 is agitated by the cylindrical stirring tool 220, and a screw tab 224 is formed on the outer surface of the cylindrical shape to increase the stirring effect of the slab 4. .

In addition, a wing tab 223 may be further formed at a contact end portion 222 which is a front end portion of the cylindrical stirring tool 220, and the wing tab 223 may be formed when the stirring tool 220 is rotated. 4) It increases the contact area with and serves to enhance the stirring effect.

To this end, the wing tab 223 may be provided to be inclined to the outside of the contact end portion 222, and a plurality of wing tabs 222 may be spaced apart from each other.

5 is a plan view showing an arrangement state of the stirring tool 220 in the segregation removal unit 1 of the present invention. Referring to the drawings, the rotation of the segregation removal unit 1 according to an embodiment of the present invention. The stirring member 200 forms a main tool line ML in which a plurality of stirring tool parts 220 are arranged on a line in the width direction y of the cast steel 4, and the main tool line ML is A pair is provided adjacent to each other in the moving direction (x) of the cast piece 4, the stirring tool unit 220 disposed in any one of the main tool line (ML) and the stirring tool unit disposed in the remaining main tool line (ML) 220 may be alternately arranged in the moving direction (x) of the cast (4).

By this arrangement, the stirring tool 220 disposed in the next main toolline ML is stirred even in the interval between the stirring tool 220 disposed in the same main in the width direction y of the cast 4. By performing the work, it is possible to stir the entire width direction y of the cast piece 4 without a dead zone with respect to the width direction y of the cast piece 4.

Then, the rotary stirring member 200 of the segregation removal unit 1 according to an embodiment of the present invention, a plurality of the stirring tool 220 disposed on the line of the slab 4 in the width direction (y) A sub tool line SL is formed, and the sub tool line SL is provided downstream of the moving direction x of the slab 4 from the main tool line ML. The stirring tool 220 to form a) may be driven when the stirring tool 220 forming the main tool line ML is stopped.

That is, the sub tool line SL does not stop the production of the slab 4 in the mold unit 2 even when the stirring tool part 220 disposed in the main tool line ML is replaced or another stop occurs. It is to be able to perform the stirring operation of segregation removal for the cast (4) by the stirring tool 220 disposed in the.

Accordingly, segregation can be removed and the cast steel 4 can be produced without stopping the production of the cast steel 4, thereby increasing the efficiency of product production.

Although the embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and various modifications and variations can be made without departing from the technical spirit of the present invention described in the claims. It will be obvious to one with ordinary knowledge.

1: segregation unit 2: mold unit
3: tundish 4: cast
100: holding member 200: rotary stirring member
210: rotary motor 220: stirring tool
221: coupling end 222: contact end
223: wing tap 224: thread tap
230: up and down driving unit 240: tool support
241: Shanghai Dongguan 242: Jam ring
243: support ring 244: extended elastic body

Claims (11)

A holding member provided on a path through which the slab formed by solidifying molten steel at least partially; And
A rotating stirring member coupled to the holding member and inserted into the cast piece to friction stir the inside of the cast piece;
Including;
The rotary stirring member,
A rotating motor unit which is connected to the holding member and provides a rotational driving force;
A stirring tool unit coupled to the rotating motor unit to receive a rotation driving force and inserted into the cast steel;
An up and down drive unit coupled to the holding member and having one end coupled to the one end of the rotating motor; And
One end is connected to the other end of the rotary motor part, which is opposite to the one end of the rotary motor part, and the other end is provided to surround the stirring tool part. A tool support part in close contact with at least a portion of the stirring tool part;
Segregation removal unit comprising a. delete delete delete The method of claim 1,
The tool support portion,
A shanghai copper tube into which at least a portion of the rotary motor part is inserted;
A catch ring formed to protrude into the upper end of the shanghai copper tube so as to be caught by a stopper protruding laterally from the lower end of the rotary motor part;
A support ring formed to protrude into the lower end of the shanghai copper tube and extending adjacent to an outer surface of the stirring tool; And
An extended elastic body provided between the support ring and a lower end of the rotary motor part to provide an elastic force to press the support ring in an extending direction of the stirring tool part;
Segregation removal unit comprising a. The method of claim 1,
The stirring tool unit, segregation removal unit characterized in that it is provided in the form of an inverted triangular pyramid wider from the coupling end coupled to the rotary motor portion toward the contact end adjacent to the slab than the coupling end. The method of claim 1,
The stirring tool portion is provided in a cylindrical shape having a constant width between the coupling end coupled to the rotary motor portion and the contact end closer to the cast than the coupling end, the contact end is formed with a wing tab is formed to extend outward inclined Segregation removal unit characterized in. The method of claim 1,
The stirring tool unit is inserted in the thickness direction of the cast steel, segregation removal unit, characterized in that inserted into a depth of at least 30% or more of the thickness of the cast steel. The method of claim 1,
The rotary stirring member forms a main tool line in which a plurality of the stirring tool parts are disposed on the line in the slab width direction, and the main tool line is provided with a pair adjacent to each other in the moving direction of the cast piece, which one The segregation removal unit, characterized in that the stirring tool portion disposed in the main tool line and the stirring tool portion disposed in the remaining main tool line are alternately arranged in the movement direction of the cast. The method of claim 9,
The rotating stirring member forms a sub tool line in which a plurality of stirring tool parts are disposed on the line in the slab width direction, and the sub tool line is provided downstream of the moving direction of the cast piece, rather than the main tool line. The segregation removal unit, characterized in that the stirring tool portion for forming the sub tool line is driven when the stirring tool portion for forming the main tool line is stopped. A casting unit receiving the molten steel from a tundish and discharging the molten steel to at least a portion of the molten steel; And
The segregation removal unit of any one of claims 1 and 5 to 10 provided on the movement path of the slab discharged from the mold unit;
Continuous casting apparatus comprising a.

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