KR102015512B1 - extracting device of short strip in continuous casting facilities and extracting method using the same - Google Patents

Abstract

Disclosed are a Danchon cast iron extracting device and a method of extracting Danchon casts using the same. Danchon cast strip taking device of the continuous casting equipment according to an embodiment is a transfer section having a plurality of transfer rolls are spaced apart from each other in the drawing direction of the cast to transfer the cast and cooled cast in the continuous casting process to the subsequent process. A seating frame that is detachably seated and is cast to a short length when the casting is stopped to prevent the short cast slab guided to the second half of the transfer section from falling between the transfer rolls; And a drawing unit which draws and removes the single village cast guided to the second half of the transfer section to the upper portion of the transfer section, wherein the transfer section includes an introduction section for transferring the cast piece in a dummy bar coupled state; Dummy bar separation section is separated from the dummy bar coupled to the cast; And a cutting section for cutting the cast bar from which the dummy bar is separated by a cutter, wherein the seating frame is provided to support the transfer rolls from the end of the introduction section to the end of the cutting section.

Description

Extracting device of short strip in continuous casting facilities and extracting method using the same}

The present invention relates to a Danchon cast iron extraction device and a method of extracting Danchon cast using a continuous casting equipment that can effectively withdraw the Danchon cast produced during the casting stop of the continuous casting process.

In general, steel manufacturing consists of a steelmaking process for producing molten iron, a steelmaking process for removing impurities from molten iron, a continuous casting process for transforming liquid iron into a solid, and a rolling process for making iron into a steel sheet or wire.

The continuous casting process is a process of continuously injecting molten steel in a mold into a mold to cool and solidify the molten steel to continuously form casts such as billets, blooms, slabs, and the like.

In the continuous casting process, the molten steel contained in the ladle is injected into the tundish, and the molten steel temporarily stored in the tundish is continuously injected into the mold. The molten steel supplied to the mold is firstly cooled while passing through the mold and then drawn out and pressed by a plurality of segment rolls, which are then produced into cast pieces as they are cooled by cooling water.

This continuously cast slab is cut into a predetermined length by a cutter in the process of being transferred to a rolling process, which is a subsequent process through a feed roller.

On the other hand, during the continuous casting process, there are times when danchon cast. That is, when the casting is stopped by an emergency situation such as clogging of the ladle molten steel into the tundish or unstable surface of the mold during the initial casting process, the cast and guide the slab to the segment below. Short bands may be formed between the vendors.

Danchon casts located between the mold and the vender should be removed from the subsequent resumption of the casting process. Shorter Danchon casts transfer the cast to the process after the continuous casting process if it is to be drawn out through the drawing path of the normal cast. There is a risk of falling between the feed rolls.

One embodiment of the present invention to solve this problem, and provides a Danchon cast strip extraction apparatus and a Danchon cast strip using the same of the continuous casting equipment that can effectively remove the danchon cast generated by the casting stop in the continuous casting process.

Danchon cast strip taking device of the continuous casting equipment according to an embodiment is a transfer section having a plurality of transfer rolls are spaced apart from each other in the drawing direction of the cast to transfer the cast and cooled cast in the continuous casting process to the subsequent process. A seating frame that is detachably seated and is cast to a short length when the casting is stopped to prevent the short cast slab guided to the second half of the transfer section from falling between the transfer rolls; And a drawing unit which draws and removes the single village cast guided to the second half of the transfer section to the upper portion of the transfer section, wherein the transfer section includes an introduction section for transferring the cast piece in a dummy bar coupled state; Dummy bar separation section is separated from the dummy bar coupled to the cast; And a cutting section for cutting the cast bar from which the dummy bar is separated by a cutter, wherein the seating frame is provided to support the transfer rolls from the end of the introduction section to the end of the cutting section.

The seating frame may include a seating part rotatably supported on a surface of a transport roll; and a support part connected to the seating part to support the transport roll.

The seating part may be provided to surround at least half of the upper circumference of the transfer roll, and the seating frame may further include a rotation support member coupled to the seat circumference so as to be rotatably supported on the surface of the feed roll. .

The feed roll includes a disk roll provided with a plurality of protrusions protruding in the form of a disk along the circumference of the disk roll, and the seating portion is formed on the upper surface of the disk roll on the side of the protrusion so that the protrusion to the upper portion of the protrusion is prevented. Can be seated.

The cutting section, the cutting wait section; And a slab cutting section for cutting the slab that passes through the cutting standby section, wherein the seating frame includes a seating frame for a slab cutting section seated in the slab cutting section. The seating frame for the slab cutting section includes A plurality of connecting bars provided to be connected between the plurality of seating parts by a plurality of the supporting parts so as to connect between the plurality of feed rolls along the drawing direction of the cast steel; And a connecting rod connecting the connecting bars to form a plurality of connecting bars with each other.

The seating frame includes a seating frame for the cutting waiting section seated in the cutting waiting section, the seating frame for the cutting wait section, a pair of the seating portion to connect between a pair of feed rolls one support portion It includes; a plurality of connecting bar provided to be connected by, a plurality of the connecting bar may be provided to be seated between the transfer roll individually.

The feed roll, the disk roll is provided with a plurality of protrusions protruding in the form of a disk along the circumference spaced in the axial direction; And a general roll having a surface evenly provided along an axial direction, wherein the seating frame includes a boundary seating frame seated at a boundary between the general roll and a disc roll. The boundary seating frame includes: A plurality of support bars provided at one end thereof so as to be seated on the disc roll on the side of the protruding part, and the support part extending from the seating part toward the general roll to form the other end; And a support bar provided at both ends to support a pair of roll base bottoms supporting both ends of the general roll to support the other ends of the plurality of support bars.

According to an embodiment of the present invention, a method of extracting a single village cast of a continuous casting facility is a method of extracting a single village cast of a continuous casting facility for extracting the single village cast using the single village cast-out device of the continuous casting facility. Install and rotate the transfer roll manually to transfer the short cast slab to the second half of the transfer section, and remove the short cast slab transferred to the second half of the transfer section by using the take-out unit to remove the upper portion of the transfer section. It is characterized by.

Danchon cast strip extraction device and continuous method of drawing cast using the same in the continuous casting equipment according to an embodiment can be cast out in the continuous casting process because it can be drawn to the outside by guiding the Danchon cast to the drawing path of the normal cast Danchon casts caused by interruptions can be effectively removed.

1 is a schematic diagram of a continuous casting facility according to an embodiment.
Figure 2 is a perspective view of the transfer section of the continuous casting facility shown in FIG.
Figure 3 shows the state before the Danchon cast strip takeout device of the continuous casting facility according to an embodiment is installed in the transport section shown in FIG.
FIG. 4 shows a state in which the caster withdrawing unit of the continuous cast iron in the state of FIG. 3 is installed in the transfer section.
5 is a plan view of FIG. 4.
6 is an enlarged view illustrating main parts of FIG. 5.
7 is an exploded state perspective view of a seating frame for the dummy bar separation section in the seating frame of the caster cast unit of the continuous cast facility according to an embodiment.
8 is a perspective view of a connecting bar forming a seating frame for the cutting standby section in the seating frame of the caster cast unit of the continuous casting equipment according to an embodiment.
9 is a side view of the connecting bar shown in FIG. 8.
10 is a perspective view of a seating frame for the slab cutting section in the seating frame of the caster cast unit of the continuous cast facility according to an embodiment.
11 is a side view of the seating frame for the slab cutting section shown in FIG.
12 is a perspective view showing a state in which the cast unit cast into a transport section in which the seating frame is installed.
FIG. 13 shows a state in which the single village casts transferred to the transfer section are withdrawn to the upper portion of the transfer section by the withdrawal unit.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments introduced below are provided as an example to sufficiently convey the spirit of the present invention to those skilled in the art to which the present invention pertains. The present invention is not limited to the embodiments described below and may be embodied in other forms. Parts not related to the description are omitted in the drawings in order to clearly describe the present invention, in the drawings, the width, length, thickness, etc. of the components may be exaggerated for convenience. Like numbers refer to like elements throughout.

1 to 2, molten steel refined in the steelmaking process in a continuous casting facility is injected into the tundish (2) through the ladle (1), a certain amount of molten steel is filled in the tundish (2) The immersion nozzle then continuously injects molten steel into the mold 3.

Before starting casting, the size of the mold 3 is adjusted to the size of the casting, in which a dummy bar (not shown) is inserted. The dummy bar fills the lower end of the mold 3 so that the molten steel can solidify without spilling.

Directly below the mold may be provided with a vendor (4) for guiding the cast to the cooling table (5) which will be described later.

The slab first cooled while passing through the mold 3 can be completely solidified while passing through the next cooling zone 5. The cooling table 5 may be provided with a plurality of segment rolls 5a for pressing the cast pieces from both sides. In the course of passing through the cooling table 5, the cast steel is cooled by the cooling water supplied to the cooling table (5).

Here, a cooling section of the continuous casting process can be formed from the mold 3 to the cooling table 5.

The cast steel that has passed through the cooling table 5 is guided to the transfer section 6, and the transfer section 6 guides the cast to the subsequent process after the continuous casting process. The subsequent process may be a rolling process or an inspection or loading process for the rolling process. In the conveyance section 6, a plurality of conveying rolls 10 supporting the bottom of the cast piece are provided to be spaced apart from each other along the drawing direction of the cast piece.

The transfer roll 10 of the transfer section 6 may be rotated by a drive motor (not shown). The driving motor may be individually connected to each of the feed rolls 10 within the range in which the cast steel is transported through the feed section 6 or may be selectively connected only to some of the feed rolls 10.

The feed roll 10 may include a general roll 20 having an even surface in the axial direction, and a disc roll 30 provided with a plurality of protrusions 31 protruding in the form of a disk along the circumference. Can be.

The transfer section 6 may include an introduction section 6a, a dummy bar separating section 6b, and a cutting section 6c sequentially arranged along the drawing direction of the cast steel.

An introduction section 6a indicates a section for conveying the slabs in a state where the dummy bar is coupled. In the introduction section 6a, a plurality of general rolls 20 may be provided at predetermined intervals. A support 7 may be provided at the bottom of the transfer roll 10 of the introduction section 6a to support the dummy bar having the joint structure.

A plurality of disk rolls 30 are provided in the cutting section 6c so as to be spaced apart by a predetermined interval, and the dummy bar separating section 6b is formed at the beginning of the general roll 20 at the end of the introduction section 6a and at the beginning of the cutting section 6c. It may be provided through the disc roll 30.

The dummy bar coupled to the cast and conveyed together with the mold is separated from the cast in the dummy bar separation section 6b and withdrawn to the outside of the transfer section 6, whereby from the cutting section 6c the cast bar is in a state in which the dummy bar is separated. Pass through the remaining transfer section.

The cutting section 6c may include a cutting standby section 6d and a slab cutting section 6e for cutting the slab having passed through the cutting wait section 6d.

The cutting standby section 6d and the slab cutting section 6e may be provided with a plurality of disc rolls 30, respectively, and the cutter 8 may be provided above the slab cutting section 6e.

The cutter 8 may be provided with a torch which moves together with the cast steel and simultaneously moves in the width direction of the cast steel, and the disk roll 30 of the cast steel cutting section 6e is damaged by the torch during the cutting process of the cast steel by the cutter. A shifting table (not shown) may be provided in the slab cutting section 6e so that there is no fear of it.

A cutting burr may be formed on a cutting surface of the slab cut by the cutter 8 in the cutting section 6c, and the cutting roll may be bent to the bottom surface of the slab in the process of transferring the disk roll 30. It can be guided between the projections 31 of. Therefore, the disk roll 30 can prevent the slab in the cut state is damaged by the cutting tongue in the transfer process.

On the other hand, during the continuous casting process, there is a case where the single village cast 9 is formed. That is, when the casting is stopped by an emergency situation such as clogging of the long nozzle injecting the molten steel of the ladle 1 into the tundish 2 or unstable surface of the mold 3 in the initial casting process, the mold ( Between the 3) and the bander 4 may be formed a short length cast piece (9).

Here, the chonchon slab (9) refers to a short length of the slab difficult to pull through the drawing path of the normal cast because there is a risk of falling between the transfer roll 10 in the course of passing through the conveying section (6).

Since the transfer section 6 does not have a support structure between the transfer rolls 10 in the remaining sections except the introduction section 6a described above, the length of the short village cast 9 is cut from the dummy bar separating section 6b to the cutting section 6c. The distance between them may be less than twice the distance between the narrowest conveying rolls 10 among the conveying rolls 10).

For example, when the distance between the transfer rolls 10 with the narrowest gap therebetween among the transfer rolls 10b from the dummy bar separation section 6b to the cutting section 6c is 2 meters, The length may be less than 4 meters.

In order to remove the single village cast 9, the single village cast cooled by a separate cooling treatment must be taken out to the upper part of the facility in a state in which the mold 3 and the vendor 4 are separated, so that the related parts are damaged as well as the casting. The restart time of the process can be slow.

Danchon cast iron extracting device according to an embodiment to guide the Danchon cast (9) by the interruption of the casting cast to the drawing path of the normal cast to the outside, thereby preventing damage to the equipment, as well as interrupted casting process Allow for quick resume.

As shown in Figures 3 to 13, the Danchon cast piece take-out device in the transfer section 6 to prevent the single village cast 9, which is guided to the second half of the transfer section 6 to fall between the transfer roll (10). A detachable seat 100 is detachably seated, and a withdrawal unit 500 which draws out and removes the short cast piece 9 guided to the second half of the transfer section 6 to the upper portion of the transfer section 6. The withdrawal unit 500 may include a crane 510.

The seating frame 100 is provided to support between the transfer rolls 10 from the end of the introduction section 6a to the end of the cutting section 6c, and the transport section 6 in the state where the short cast iron 9 is prevented from falling. Along the transport section (6) to be guided to the second half.

In the case of the introduction section 6a of the cooling section and the conveying section 6, since there is no fear that the short cast 9 may be separated through the segment roll 5a and the support 7, the introduction section through the seating frame 100. When the fall of the single village cast 9 is prevented only in the remaining transfer section 6 except for (6a), the single village cast 9 can be safely transported to the second half of the transfer section 6.

The seating frame 100 includes a seating frame 200 for a dummy bar separating section seated in a dummy bar separating section 6b, a seating frame 300 for a cutting waiting section seated in a cutting waiting section 6d, and a slab cutting. It may include a seating frame 400 for the slab cutting section to be seated in the section (6e).

Each of the seating frames 200, 300, and 400 has a seating part 110 rotatably supported on the surface of the feed roll 10, and a support 120 connected to the seating part 110 to support the feed roll 10. It may include.

The seating unit 110 is provided to surround at least half of the upper circumference of the transport roll 10, and the rotation support member 130 is rotatably supported on the surface of the transport roll 10 around the bottom of the seating unit 110. Can be combined.

As the rotary support member 130, a sliding bush 131 or a bearing may be employed, and as the sliding bush 131, a copper-based material may be used.

The seating unit 110 is provided to be seated on the upper surface of the disc roll 30 on the side of the protrusion 31 so as to prevent the protrusion to the upper portion of the protrusion 31, and the support 120 may be limited to the bottom of the protrusion 31. have. Therefore, the seating frame 100 can be minimized to increase the transfer resistance of the single cast slab 9 by the feed roll 10 even in a state seated on the feed roll (10).

As illustrated in FIG. 7, the seating frame 200 for the dummy bar separation section may form a boundary type seating frame seated at a boundary between the general roll 20 and the disc roll 30.

In the boundary type seating frame, a seating part 110 is provided at one end to be seated on the disc roll 30 on the side of the protrusion 31, and the support part 120 extending from the seating part 110 toward the general roll 20 is provided. A support provided to support a plurality of support bars 210 forming an end portion and a roll base 11 supporting both ends of the general roll 20 so as to support the other ends of the plurality of support bars 210. Bar 220 may be included.

The seating unit 110 may be provided to wrap the circumference of the disk roll 30 to 135 degrees while reducing the rotational resistance of the disk roll 30, while stably mounting the end of the support bar 210.

 Support bar 210 is composed of a pair between the connection between the connection 211 to form a body, the support bar 220 may be configured as one. The pair of support bars 210 forming a body through the connecting table 211 can be installed and removed integrally.

Fixing parts 221 are provided at both ends of the support bar 220 so as to be fixed to the roll base 11 by fastening members, and at other ends of the support bar 210, fastening parts positioned between both ends of the support bar 220 ( The assembly unit 212 may be provided to be fixed to the fastening member 222.

The seating frame 200 for the dummy bar separation section as described above is connected between the general roll 20 and the disc roll 30 without being directly connected to the general roll 20 so that the rotational resistance of the general roll 20 does not increase. (9) can be prevented from falling.

As shown in FIGS. 8 to 9, the seating frame 300 for the cutting waiting section has a pair of seating parts 110 connected by a single support part 120 to connect the pair of disk rolls 30. It may be configured through a plurality of connecting bars 310 provided to be connected. The seating unit 110 may be provided to surround the circumference of the disk roll 30 to 135 degrees while reducing the rotational resistance of the disk roll 30 while maintaining a stable mounting of the end of the connecting bar 310.

The plurality of connecting bars 310 are individually installed to be seated between the disc rolls 30, and the connecting bars 310 arranged successively in the drawing direction of the cast pieces are interposed between the protrusions 31 of the disc rolls 30 so as to cross each other. Can be seated on

As described above, the seating frame 300 for the cutting waiting section composed of a plurality of connecting bars 310 seated separately is considering the characteristics of the cutting waiting section 6d, which is difficult to access to a facility such as a crane. The operator 310 is provided to be installed by moving the worker directly to the installation site.

As shown in Figures 10 to 11, the seating frame for the cutting section 400 is a plurality of support portions between the plurality of seating portion 110 to connect between the plurality of feed rolls 10 along the drawing direction of the cast steel. A plurality of connection bars 410 provided to be connected by the 120 and a plurality of connection bars 410 may include a connection table 420 for connecting between the connection bar 410 to form a body with each other.

The seating unit 110 provided between both ends of the connection bar 410 is provided in a semi-circular shape surrounding the circumference of the disc roll 30 180 degrees so as to be stably supported by the disc roll 30, and the connection bar 410. Seating unit 110 which is located at both ends of the) can be provided to wrap around the circumference of the disk roll 30 135 degrees while reducing the rotational resistance of the disk roll 30, while the stable mounting of the end of the connecting bar 410 have. The connection bar 410 may be configured in a pair.

And the connecting table 420 by integrally connecting between the plurality of connecting bars 410, so that the mounting frame 400 for the slab cutting section can be easily installed and removed using the equipment.

In addition, the connecting rod 420 connecting between the connection bar 410 is to make the mounting frame 400 for the slab cutting section to be easily caught by the take-out unit 500, the shape of the single village cast (9) is unstable 9) in the state supported on the seating frame 400 for the slab cutting section 400 to be easily withdrawn to the upper section of the transport section with the seating frame 400 for the slab cutting section.

Hereinafter, the withdrawal method of the Danchon cast steel 9 using the Danchon cast iron extracting apparatus according to an embodiment will be described.

When the continuous casting initial casting is stopped and the short cast 9 is generated between the mold 3 and the vender 4, first, the seating frame 100 is installed in the transfer section 6 so that the short cast 9 is There is no fear of falling between the transfer roll 10 during the transfer to the distal end of the transfer section (6).

When the seating frame 100 is installed, the danchon cast (9) is once moved to the cooling table (5) in the same manner as the normal cast. That is, at this time, the cast unit 9 may be cooled while passing through the bender 4 and the cooling table 5 in a state connected to the dummy bar (not shown).

The dummy bar is separated in the process of passing through the dummy bar separating section 6b of the conveying section 6 through the introduction section 6a of the conveying section 6 through the single village cast 9 passing through the cooling table 5. In this state, the worker manually rotates the conveying roll 10 of the conveying section 6 so that the short cast slab 9 is conveyed to the upper part of the cutting section.

At this time, the cast unit (9) can be safely transported to the upper end of the transfer section 6 without fear of falling between the transfer roll 10 through the seating frame 100 installed to support between the transfer roll (10) do.

In addition, the single village cast piece 9 may be removed by being lifted to the upper portion of the transfer section 6 through the withdrawal unit 500 in the state transferred to the upper end of the transfer section 6.

At this time, the shape of the Danchon cast (9) is unstable so that the Danchon cast (9) is supported on the seating frame 400 for the slab cutting section in the upper state with the seating frame 400 for the slab cutting section to the upper transfer section (6). When withdrawing, the seating frame 400 for the cast slab cutting section can be safely withdrawn to the upper portion of the transfer section 6 in the state simply caught by the hook of the withdrawal unit 500 through the connecting table 420.

Danchon cast (9) is withdrawn from the transport section (6), the seating frame for the cutting section (400) is removed in the state that the rest of the waiting frame for rest cutting frame 300 and the dummy bar separation section seating frame 200 By sequentially removing the withdrawal operation of the Danchon cast (9) is terminated, whereby the continuous casting equipment is switched to the state that can immediately resume the casting process.

1: ladle 2: tundish
3: mold 4: vender
5: Cooling stand 6: Transfer section
10: feed roll 20: general roll
30: disc roll 100: seating frame
200: Seating frame for dummy bar separation section 300: Seating frame for cutting standby section
400: seating frame for the slab cutting section 500: take-out unit

Claims (8)

It is separably seated in a transfer section having a plurality of feed rolls spaced apart from each other in the drawing direction of the cast to transfer the casted and cooled cast in a continuous casting process to a subsequent process, and is cast in a short length when the casting stops A seating frame which prevents the single village cast guided to the second half of the transfer section from falling between the transfer rolls; And
And a withdrawal unit configured to withdraw the Danchon cast pieces guided to the second half of the transfer section to the upper portion of the transfer section.
The transfer section,
An introduction section for transferring the cast steel in which the dummy bar is coupled;
Dummy bar separation section is separated from the dummy bar coupled to the cast; And
And a cutting section for cutting the cast bar from which the dummy bar is separated through a cutter.
The seating frame is a single cast unit drawing device of the continuous casting facility provided to support between the feed roll from the end of the introduction section to the end of the cutting section. The method of claim 1,
The seating frame,
Mounting portion rotatably supported on the surface of the transfer roll; And
Danchon cast iron take-out device of a continuous casting facility comprising a; support portion connected to the seating portion to support between the transfer roll. The method of claim 2,
The seating portion is provided to surround at least half of the upper circumference of the transfer roll,
The seating frame,
And a rotary support member coupled around a seat bottom surface so as to be rotatably supported on the surface of the transfer roll. The method of claim 3,
The feed roll,
A plurality of protrusions protruding in the form of a disk along the circumference includes a disk roll spaced apart in the axial direction,
And the seating portion is drawn out on the upper surface of the disc roll on the side of the protrusion so that protrusion of the protrusion is prevented. The method of claim 3,
The cutting section,
Cutting waiting section; And
Includes; cutting section for cutting the slab passed through the cutting standby section;
The seating frame,
Includes; seating frame for the slab cutting section seated in the slab cutting section;
The seating frame for the slab cutting section,
A plurality of connecting bars provided to be connected between the plurality of seating parts by the plurality of supporting parts to connect the plurality of feed rolls along the drawing direction of the cast steel; And
Single cast unit withdrawal device of a continuous casting facility comprising a; connecting bars for connecting between the connecting bar so that a plurality of the connecting bar to form a body. The method of claim 5,
The seating frame,
And a seating frame for a cutting waiting section seated in the cutting waiting section.
The seating frame for the cutting standby section,
And a plurality of connecting bars provided to be connected by one support to the pair of seating parts so as to connect between the pair of feed rolls.
A plurality of the connecting bar is a single cast unit drawing device of the continuous casting equipment provided to be seated between the transfer roll individually. The method of claim 3,
The feed roll,
A disk roll provided with a plurality of protrusions protruding in a disk shape along the circumference of the disk roll in a axial direction; And
It comprises a general roll having a surface evenly provided along the axial direction,
The seating frame,
Includes; Border type seating frame seated between the general roll and the disk roll,
The border-mounting frame,
A plurality of support bars provided at one end thereof so as to be seated on the disc roll on the side of the protruding part, and the support part extending from the seating part toward the general roll to form the other end; And
And a support bar provided at both ends of the pair of roll bases supporting both ends of the general roll to support the other ends of the plurality of support bars. The method of extracting the single village cast of the continuous casting facility for drawing out the single village cast using the single village cast unit drawing device of the continuous casting facility according to any one of claims 1 to 7,
Install the seating frame in the transfer section,
Manually rotating the feed roll to transfer the short cast slab to the second half of the transfer section,
A single village caster withdrawal method of a continuous casting facility for removing the cast unit cast to the second half of the transfer section by withdrawing the upper portion of the transfer section using the withdrawal unit.

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