JP2023151904A - Sample piece recovery system and sample piece recovery method - Google Patents

Abstract

To provide a sample piece recovery system and a sample piece recovery method that can identify which cast piece a sample piece was taken from and achieve space-saving when recovering a sample piece from multiple cast pieces continuously casted in a continuous casting facility.SOLUTION: A sample piece recovery system comprises: a conveying part 10 extending along a conveying direction intersecting a casting direction, and configured to send, toward downstream in the conveying direction, a first sample piece being cut off from a first cast piece and a second sample piece being cut off from a second cast piece; a recovery container 20 that is located near the most downstream end of the conveying part, and includes a first area and a second area on which the first sample piece and the second sample piece are placed, respectively; and a change part configured to change a position or a posture of the collection container so that the first area is adjacent to the most downstream end when the first sample piece falls from the most downstream end and the second area is adjacent to the most downstream end when the second sample piece falls from the most downstream end.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a sample piece collection device and a sample piece collection method.

Patent Document 1 discloses a method for collecting a sample piece from a slab (strand) that is continuously cast in continuous casting equipment. In this method, a cutting torch cuts the slab while moving in synchronization with the casting speed of the slab to form a sample piece, and a cart receives the sample piece that is cut from the slab and falls. and moving the truck carrying the sample piece in a direction intersecting the casting direction of the slab, and taking out the sample piece from the truck at a standby position where it does not interfere with the flow of the slab. The components of the sample piece taken out are analyzed, and the quality of the slab corresponding to the sample piece is determined.

Japanese Unexamined Patent Publication No. 168951/1983

By the way, in continuous casting equipment that continuously casts multiple slabs, one tundish supplies molten metal to multiple molds, pulls the slabs from each mold, and continuously casts multiple slabs in parallel. There is. In this case, when attempting to collect sample pieces from each slab using the method of Patent Document 1, a plurality of sample pieces will be mixed in one cart. Therefore, even if a sample piece is analyzed for its components, it is not possible to determine which continuous cast piece it is.

Therefore, it is conceivable to prepare a plurality of carts so as to correspond to each slab. However, a large space is required to move the plurality of carts to the standby position, and furthermore, the cost for installing the plurality of carts increases.

The present disclosure makes it possible to specify from which slab a sample piece is collected, and to save space when collecting sample pieces from a plurality of slabs that are continuously cast in continuous casting equipment. A sample piece collection device and a sample piece collection method that can perform this will be explained.

An example of a sample piece recovery device collects a first sample piece and a second sample piece from each of a first piece and a second piece that are continuously cast along a predetermined casting direction in continuous casting equipment. configured to be collected. An example of a sample piece recovery device extends along a conveyance direction that intersects with the casting direction, and collects a first sample piece cut off from a first cast piece and a second sample cut off from a second cast piece. a conveyance section configured to send out a sample piece downstream in the conveyance direction; and a second sample piece located near the most downstream end of the conveyance section and on which a first sample piece and a second sample piece are placed, respectively. a collection container including a first region and a second region; when the first sample piece falls from the most downstream end, the first region is adjacent to the most downstream end, and the second sample piece is adjacent to the most downstream end; and a changing section configured to be able to change the position or attitude of the collection container so that the second region is adjacent to the most downstream end when falling from the end.

An example of a method for collecting a sample piece is to form a first sample piece by cutting a first piece continuously cast along a predetermined casting direction in a continuous casting facility, and to form a first sample piece by cutting a first piece continuously cast along a predetermined casting direction in continuous casting equipment. The first sample piece is sent to the downstream side of the conveyance direction by a conveyance section extending along the conveyance direction that intersects the casting direction, and the first sample piece that falls from the most downstream end of the conveyance section is sent to the downstream side of the conveyance direction. A second sample piece is formed by placing the piece in a first region of a recovery container located near the downstream end, and cutting a second piece that is continuously cast along the casting direction in the continuous casting equipment. The second sample piece cut off from the second slab is sent to the downstream side in the conveyance direction by the conveyor, and the second sample piece falling from the most downstream end is sent to the collection container. placing it in a second area different from the first area.

According to the sample piece collection device and sample piece collection method according to the present disclosure, when collecting sample pieces from a plurality of slabs that are continuously cast in continuous casting equipment, it is possible to identify from which slab the sample piece was collected. In addition, it is possible to save space.

FIG. 1 is a side view schematically showing an example of continuous casting equipment. FIG. 2 is a top view schematically showing an example of a sample piece recovery device. FIG. 3 is a side view of FIG. 2. FIG. 4 is a top view schematically showing another example of the sample piece recovery device. FIG. 5 is a side view of FIG. 4.

In the following description, the same elements or elements having the same function will be denoted by the same reference numerals, and redundant description will be omitted. In this specification, when referring to the upper, lower, right, or left side of a figure, the direction of the symbol in the figure is used as a reference.

[Configuration of continuous casting equipment]
First, the configuration of continuous casting equipment 100 will be explained with reference to FIG. 1. Continuous casting equipment 100 includes a ladle 101, a tundish 102, a mold 103, a secondary cooling zone 104, a pinch roll 105, a plurality of light reduction devices 106, a plurality of slab support rolls 107, and a cast member. It includes a single-piece pressing device 108, a cutting machine 109, and a sample piece collecting device 1.

The ladle 101 is a container that stores molten metal (molten steel) M. Tundish 102 is arranged below ladle 101. The tundish 102 has a function of storing the molten metal M flowing out from the ladle 101 and removing inclusions (for example, granular solids made of alumina, etc.) present in the molten metal M.

The mold 103 is placed below the tundish 102. The mold 103 cools the molten metal flowing out from a nozzle provided on the bottom wall of the tundish 102 and shapes it into a predetermined shape to form a strand St (strand).

The secondary cooling zone 104 is located downstream of the mold 103 and further cools the slab St pulled out from the mold 103. In this cooling process, the slab St gradually solidifies from the surface side. In other words, unsolidified molten steel exists inside the slab St that has passed through the secondary cooling zone 104. The pinch roll 105 is located on the downstream side of the secondary cooling zone 104, and pulls out the slab St toward the downstream side along the casting direction Ar1 while straightening the bend.

Here, the slab St formed by the mold 103 is composed of a solidified part (solidified shell) whose surface part is solidified, and a molten part (unsolidified molten steel) which is molten metal in an unsolidified state inside the solidified shell. ing. As the slab St moves downstream, it is cooled in the secondary cooling zone 104 and the like, the molten part gradually solidifies, and a solidified shell grows. That is, as the solidified shell grows, the molten part shrinks and the thickness of the solidified shell increases. Before the slab St reaches the slab rolling down device 108, the slab St is completely solidified.

A plurality of light reduction devices 106 are located downstream of the secondary cooling zone 104. The light reduction device 106 is configured to press the slab St in the middle of solidification from above and below using a pair of light reduction rolls. Specifically, the light reduction device 106 uses a pair of light reduction rolls to reduce the vicinity of a portion of the slab St where the molten portion is at the final stage of solidification. This suppresses the occurrence of internal cracks and center segregation in the slab St.

The plurality of slab support rolls 107 are arranged so as to line up along the extending direction of the slab St on the downstream side of the light reduction device 106. The slab support roll 107 has a function of conveying the slab St toward the downstream side while cooling it.

The slab rolling down device 108 is located downstream of the light rolling down device 106. The slab rolling down device 108 is configured to press the solidified slab St from above and below using a pair of rolling rolls. This suppresses the formation of minute cavities extending in the extending direction of the slab St in the central portion of the slab St.

The cutting machine 109 is located downstream of the slab rolling down device 108. The cutting machine 109 is, for example, a gas cutting torch, and cuts the slab St that has reached the cutting machine 109 in the width direction. Thereby, a metal piece P or sample piece Sp as a product is formed. The sample piece Sp is subjected to component analysis by a component analyzer or the like (not shown) in order to determine the quality of the source slab St.

Although not shown in FIG. 1, the continuous casting equipment 100 is configured to manufacture a plurality of slabs St in parallel. Therefore, the continuous casting equipment 100 includes a mold 103, a secondary cooling zone 104, a pinch roll 105, a plurality of light reduction devices 106, a plurality of slab support rolls 107, a slab reduction device 108, and a cutting machine. It is equipped with a plurality of units consisting of 109. These units may be arranged, for example, along a direction perpendicular to the paper plane of FIG.

The bottom wall of the tundish 102 is provided with a plurality of nozzles extending toward the mold 103 of each unit. As a result, the molten metal supplied to the mold 103 of each unit passes through the secondary cooling zone 104, the pinch rolls 105, the plurality of light reduction devices 106, and the slab reduction device 108 of each unit, as described above. As a result, a solidified slab St is obtained.

[Configuration of sample piece collection device]
Next, details of the sample piece recovery device 1 will be explained with reference to FIGS. 2 and 3. In the example shown in FIGS. 2 and 3, the continuous casting equipment 100 includes six units, and six slabs St are formed. Below, these six slabs St may be referred to as slabs St1 to St6, respectively. Further, the sample pieces Sp collected from the slabs St1 to St6 may be referred to as sample pieces Sp1 to Sp6, respectively. In the example shown in FIGS. 2 and 3, specimen pieces Sp1 to Sp5 are cut from slabs St1 to St5, respectively, at substantially the same time. However, the sample piece Sp may be cut from at least one of the slabs St1 to St6, or the sample piece Sp may be cut from at least two of the slabs St1 to St6 at approximately the same time or at different timings. It may be cut by.

The sample piece collection device 1 includes a transport section 10, a collection container 20, a changing section 30, and a lifting section 40.

The conveyance unit 10 includes a support member 11 , a chute 12 (the most downstream end), a pair of chains 13 , a plurality of extrusion members 14 , and a drive source 15 . The support member 11 extends horizontally along a conveying direction Ar2, which is a direction intersecting the casting direction Ar1. The support member 11 has, for example, a flat plate shape. The support member 11 extends from the vicinity of the slab St6 to the vicinity of the chute 12. One end (upstream end) of the support member 11 is located on the slab St6 side, and the other end (downstream end) of the support member 11 is located on the chute 12 side. The support member 11 is configured to support the sample piece Sp cut out from the slab St and dropped. The support member 11 may be made of metal, for example.

Chute 12 is located adjacent to the downstream end of support member 11 . The chute 12 extends from the downstream end of the support member 11 toward the collection container 20 while being inclined downward. The chute 12 may be made of metal, for example.

The pair of chains 13 are arranged on the sides of the support member 11, respectively. The pair of chains 13 has an annular shape. The support member 11 is spanned over sprockets 16 disposed at the upstream and downstream ends of the support member 11, respectively. As a result, the upper portions of the pair of chains 13 extend along the conveyance direction Ar2 at approximately the same height as the upper surface of the support member 11. The lower portions of the pair of chains 13 may be bent downward.

The plurality of extrusion members 14 extend between the pair of chains 13 so as to connect the pair of chains 13. The plurality of extrusion members 14 are arranged at predetermined intervals in the direction in which the pair of chains 13 extend. The arrangement interval of the plurality of extrusion members 14 may correspond, for example, to the interval between adjacent slabs St among slabs St1 to St6. In this case, the plurality of sample pieces Sp cut out from at least two of the slabs St1 to St6 at approximately the same time and falling are surrounded by two adjacent extrusion members 14 among the plurality of extrusion members 14 and the pair of chains 13. They cannot be located in one area at the same time.

The drive source 15 is configured to rotationally drive the sprocket 16. The drive source 15 may be configured by, for example, a motor. When the drive source 15 rotationally drives the sprocket 16, the upper portions of the pair of chains 13 move along the conveying direction Ar2 from the upper end side to the lower end side of the support member 11, and the lower portions of the pair of chains 13 move from the upper end side to the lower end side of the support member 11. The member 11 moves from the lower end side to the upper end side along the conveying direction Ar2. In the example of FIG. 3, the pair of chains 13 rotate clockwise. As a result, the plurality of extrusion members 14 also move on the upper surface of the support member 11 from the upper end side to the lower end side of the support member 11 along the conveyance direction Ar2.

When the sample piece Sp is placed on the support member 11, the extrusion member 14 that has moved from the upstream side of the sample piece Sp contacts the sample piece Sp and pushes the sample piece Sp to the lower end of the support member 11 as it is. . The sample piece Sp pushed to the lower end of the support member 11 by the extrusion member 14 falls toward the chute 12, slides down the chute 12, and then falls into the collection container 20. That is, the transport unit 10 is configured to send the sample piece Sp downstream in the transport direction Ar2 and transport it to the collection container 20.

The collection container 20 is located near the lower end of the chute 12 so as to be adjacent to the lower end of the chute 12 (that is, the most downstream end of the transport section 10).
The collection container 20 is configured to collect the sample piece Sp transported by the transport section 10. The collection container 20 has a cylindrical shape with a bottom. In the example of FIGS. 2 and 3, the collection container 20 has a circular shape when viewed from above.

A plurality of partition members 21 are provided within the collection container 20 . In the example of FIG. 2, the plurality of partition members 21 are provided within the collection container 20 so as to divide the space within the collection container 20 into six. As a result, within the recovery container 20, a plurality of regions (six regions R1 to R6 in FIG. 2) are partitioned by the plurality of partition members 21. These regions R1 to R6 are arranged along a circular shape (along the circumferential direction of the collection container 20).

The changing unit 30 is configured to be able to change the attitude of the collection container 20. In the example of FIGS. 2 and 3, the changing unit 30 includes a rotating shaft 31, a rotating table 32, and a plurality of rollers 33.

As illustrated in FIG. 3, the rotating shaft 31 is provided on the floor so as to extend upward from the floor along the vertical direction. The rotating shaft 31 is configured to be rotatable with respect to the floor surface. The rotating table 32 is provided at the upper end of the rotating shaft 31. Therefore, the rotating table 32 is configured to rotate around a rotating shaft 31 extending in the vertical direction. The rotary table 32 may be rotated manually by an operator, or the rotary table 32 may be rotated by a drive source (not shown). The collection container 20 can be placed on the top surface of the rotating table 32.

The plurality of rollers 33 are arranged so as to line up along the circumferential direction of the rotating shaft 31. The plurality of rollers 33 support the lower surface of the rotary table 32. Therefore, when rotating the rotating table 32, the rotating table 32 is rotated more smoothly by the plurality of rollers 33.

The changing unit 30 has the above-mentioned configuration and is configured to be able to rotate the collection container 20 placed on the rotating table 32 around the rotating shaft 31 (see arrow Ar3 in FIG. 2). Therefore, as the collection container 20 rotates, the positions of the regions R1 to R6 relative to the chute 12 change. For example, when the region R1 is located adjacent to the chute 12 due to the rotation of the collection container 20 (see FIG. 2), the sample piece Sp transported by the transport section 10 is accommodated in the region R1 of the collection container 20. . The same applies to the other regions R2 to R5. That is, by collecting the sample pieces Sp into the collection container 20 while rotating the collection container 20 so that the sample pieces Sp1 to Sp6 are accommodated in the regions R1 to R6, respectively, mixing of the sample pieces Sp1 to Sp6 is prevented. Ru.

The lifting unit 40 lifts the recovery container 20 and moves the recovery container between the rotary table 32 and a position away from the conveyance unit 10 (for example, a position that does not interfere with the slab St manufactured by the continuous casting equipment 100). 20 is configured to be movable (see arrow Ar4 in FIG. 3). The lifting unit 40 may be, for example, an overhead crane installed on the ceiling of the building of the continuous casting facility 100, a hoist, or the like.

[Effect]
According to the above example, the sample pieces Sp1 to Sp6 cut off from the slabs St1 to St6, respectively, are recovered in one and the same recovery container 20. Moreover, at the time of collection, the sample pieces Sp1 to Sp6 are respectively placed in different regions R1 to R6 of the collection container. Therefore, when collecting a sample piece Sp from a plurality of slabs St that are continuously cast in the continuous casting equipment 100, from which slab St is the sample piece Sp collected depending on the area where the sample piece Sp is placed in the collection container 20? It becomes possible to specify whether it is the sample piece Sp. Moreover, since the specimen Sp can be identified by simply changing the attitude of one collection container 20, it is also possible to save space.

According to the above example, the collection container 20 includes the partition member 21 that partitions the regions R1 to R6. Therefore, the presence of the partition member 21 prevents, for example, the sample piece Sp1 from entering other regions R2 to R6. Therefore, since there is no mixing of sample pieces Sp, it becomes possible to reliably identify from which slab St the sample piece Sp is collected.

According to the above example, the changing unit 30 is configured to be able to rotate the collection container 20 around the rotation shaft 31, and the regions R1 to R6 are arranged in the circumferential direction of the collection container 20 (the circumferential direction of the rotation shaft 31). They are lined up along the line. Therefore, it is possible to identify the sample piece Sp by simply rotating one collection container 20, so it is possible to further save space.

According to the above example, the collection container 20 is transported between the rotary table 32 and a position distant from the transport section 10 while being lifted by the lifting section 40 . Therefore, by moving the collection container 20 containing the sample piece Sp to a location away from the transport unit 10 using the lifting unit 40, an operator can take out the sample piece Sp from the collection container 20 in a safe place. becomes possible. Furthermore, by placing another collection container on the rotating table 32 during the work of taking out the sample piece Sp from the collection container 20, the sample piece Sp can be collected by the other collection container. Therefore, it becomes possible to continuously collect the sample pieces Sp.

[Modified example]
The disclosure herein should be considered to be illustrative in all respects and not restrictive. Various omissions, substitutions, changes, etc. may be made to the above examples without departing from the scope and gist of the claims.

(1) A plurality of rollers 33 may be provided on the bottom surface of the collection container 20. In this case as well, the collection container 20 can change its position or attitude.

(2) The collection container 20 may have a shape other than circular. For example, as illustrated in FIGS. 4 and 5, the collection container 20 may have a rectangular shape. In this case, the plurality of partition members 21 are arranged so as to line up along the longitudinal direction of the collection container 20. Therefore, the regions R1 to R6 are also arranged along the longitudinal direction of the collection container 20. Moreover, in the example of FIG. 4 and FIG. 5, the changing part 30 may be a plurality of wheels rotatably attached to the collection container 20. The changing unit 30 may be configured to be able to move the collection container 20 linearly along a moving direction Ar5 that is a direction intersecting the transport direction Ar2.

In this case as well, as in the examples of FIGS. 2 and 3, the positions of regions R1 to R6 relative to chute 12 change as collection container 20 moves. Therefore, by collecting the sample pieces Sp into the collection container 20 while moving the collection container 20 so that the sample pieces Sp1 to Sp6 are accommodated in the regions R1 to R6, respectively, mixing of the sample pieces Sp1 to Sp6 can be prevented. Ru. Therefore, in the examples of FIGS. 4 and 5 as well, it is possible to specify from which slab St the sample piece Sp is collected, depending on the area in which the sample piece Sp is placed in the recovery container 20. Become. Moreover, since the sample piece Sp can be identified by simply changing the position of one collection container 20, it is also possible to save space.

[Other examples]
Example 1. An example of a sample piece recovery device collects a first sample piece and a second sample piece from each of a first piece and a second piece that are continuously cast along a predetermined casting direction in continuous casting equipment. configured to be collected. An example of a sample piece recovery device extends along a conveyance direction that intersects with the casting direction, and collects a first sample piece cut off from a first cast piece and a second sample cut off from a second cast piece. a conveyance section configured to send out a sample piece downstream in the conveyance direction; and a second sample piece located near the most downstream end of the conveyance section and on which a first sample piece and a second sample piece are placed, respectively. a collection container including a first region and a second region; when the first sample piece falls from the most downstream end, the first region is adjacent to the most downstream end, and the second sample piece is adjacent to the most downstream end; and a changing section configured to be able to change the position or attitude of the collection container so that the second region is adjacent to the most downstream end when falling from the end. In this case, the first sample piece and the second sample piece cut off from the first slab and the second slab, respectively, are collected in one and the same collection container. Moreover, at the time of recovery, the first sample piece and the second sample piece are respectively placed in the first area and the second area, which are different areas of the recovery container. Therefore, when collecting sample pieces from multiple slabs that are continuously cast in continuous casting equipment, it is necessary to determine which slab the sample piece was taken from depending on the area where the sample piece is placed in the collection container. It becomes possible to specify. Moreover, since the sample piece can be identified by simply changing the position or posture of one collection container, it is also possible to save space.

Example 2. In the device of Example 1, the collection container may include a partition member that partitions the first region and the second region. In this case, the presence of the partition member prevents the first sample piece from entering the second area and the second sample piece from entering the first area. Therefore, since there is no mixing of sample pieces, it becomes possible to reliably identify from which slab the sample pieces are taken.

Example 3. In the device of Example 1 or Example 2, the changing part is configured to be able to rotate the collection container around a rotation axis extending along the vertical direction, and the first area and the second area are arranged in the circumferential direction of the rotation axis. They may be lined up along the In this case, it is possible to identify a sample piece by simply rotating one collection container, so it is possible to further save space.

Example 4. In the device of Example 1 or Example 2, the changing unit is configured to be able to move the collection container in a movement direction that intersects the conveyance direction, and the first area and the second area are arranged in line along the movement direction. You can stay there. In this case, it is possible to identify a sample piece by simply moving one collection container in a predetermined movement direction, so it is possible to further save space.

Example 5. The device of Example 1 or Example 2 may further include a lifting section configured to lift and move the collection container between the vicinity of the most downstream end and a location away from the transport section. In this case, by moving the collection container containing the sample pieces to a location away from the transport unit using the lifting section, it becomes possible for the worker to take out the sample pieces from the collection container in a safe location. .

Example 6. The device of Example 3 may further include a lifting section configured to lift and move the collection container between the vicinity of the most downstream end and a location away from the transport section. In this case, the same effects as the device 5 in the example can be obtained.

Example 7. The device of Example 4 may further include a lifting section configured to lift and move the collection container between the vicinity of the most downstream end and a location away from the transport section. In this case, the same effects as the device of Example 5 can be obtained.

Example 8. An example of a method for collecting a sample piece is to form a first sample piece by cutting a first piece continuously cast along a predetermined casting direction in a continuous casting facility, and to form a first sample piece by cutting a first piece continuously cast along a predetermined casting direction in continuous casting equipment. The first sample piece is sent to the downstream side of the conveyance direction by a conveyance section extending along the conveyance direction that intersects the casting direction, and the first sample piece that falls from the most downstream end of the conveyance section is sent to the downstream side of the conveyance direction. A second sample piece is formed by placing the piece in a first region of a recovery container located near the downstream end, and cutting a second piece that is continuously cast along the casting direction in the continuous casting equipment. The second sample piece cut off from the second slab is sent to the downstream side in the conveyance direction by the conveyor, and the second sample piece falling from the most downstream end is sent to the collection container. placing it in a second area different from the first area. In this case, the same effects as the device of Example 1 can be obtained.

DESCRIPTION OF SYMBOLS 1... Sample piece collection device, 10... Transport part, 12... Chute (most downstream end) 20... Collection container, 21... Partition member, 30... Changing part, 40... Lifting part, 100... Continuous casting equipment, Ar1... Casting direction , Ar2...transportation direction, Ar5...movement direction, R1 to R6...area, Sp, Sp1 to Sp5...sample piece, St, St1 to St6...cast piece.

Claims (8)

A sample configured to collect a first sample piece and a second sample piece from each of a first slab and a second slab that are continuously cast along a predetermined casting direction in continuous casting equipment. A piece collection device,
The first sample piece extends along the conveying direction that intersects the casting direction, and the first sample piece is cut off from the first slab, and the second sample piece is cut off from the second slab. a conveyance unit configured to send out downstream in the conveyance direction;
a collection container located near the most downstream end of the transport section and including a first region and a second region in which the first sample piece and the second sample piece are placed, respectively;
When the first sample piece falls from the most downstream end, the first region is adjacent to the most downstream end, and when the second sample piece falls from the most downstream end, the first region is adjacent to the most downstream end. and a changing unit configured to be able to change the position or orientation of the collection container so that the region No. 2 is adjacent to the most downstream end. The apparatus according to claim 1, wherein the collection container includes a partition member that partitions the first region and the second region. The changing unit is configured to be able to rotate the collection container around a rotation axis extending along the vertical direction,
The device according to claim 1 or 2, wherein the first region and the second region are arranged along the circumferential direction of the rotation shaft. The changing unit is configured to be able to move the collection container in a movement direction intersecting the transport direction,
The device according to claim 1 or 2, wherein the first region and the second region are lined up along the moving direction. The apparatus according to claim 1 or 2, further comprising a lifting section configured to lift and move the collection container between the vicinity of the most downstream end and a location away from the transport section. The apparatus according to claim 3, further comprising a lifting section configured to lift and move the collection container between a vicinity of the most downstream end and a location away from the transport section. The apparatus according to claim 4, further comprising a lifting section configured to lift and move the collection container between a vicinity of the most downstream end and a location away from the transport section. Cutting a first slab continuously cast along a predetermined casting direction in continuous casting equipment to form a first sample piece;
Sending the first sample piece cut off from the first slab to the downstream side of the conveyance direction by a conveyance section extending along the conveyance direction intersecting the casting direction;
placing the first sample piece falling from the most downstream end of the transport section in a first region of a collection container located near the most downstream end;
cutting a second slab continuously cast along the casting direction in the continuous casting equipment to form a second sample piece;
Sending the second sample piece cut off from the second slab to the downstream side in the conveying direction by the conveying section;
A method for collecting a sample piece, comprising placing the second sample piece falling from the most downstream end in a second region of the collection container that is different from the first region.

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