US20200331045A1 - Continuous casting and rolling apparatus and continuous casting and rolling method - Google Patents

Continuous casting and rolling apparatus and continuous casting and rolling method Download PDF

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Publication number
US20200331045A1
US20200331045A1 US16/759,046 US201816759046A US2020331045A1 US 20200331045 A1 US20200331045 A1 US 20200331045A1 US 201816759046 A US201816759046 A US 201816759046A US 2020331045 A1 US2020331045 A1 US 2020331045A1
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Prior art keywords
slab
rolling
continuous casting
tunnel furnace
main path
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US16/759,046
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English (en)
Inventor
Jea-Sook CHUNG
Yong-Seok Cho
Jong-Pan Kong
Kyung-Se CHA
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Posco Holdings Inc
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Posco Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/466—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/004—Heating the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1213—Accessories for subsequent treating or working cast stock in situ for heating or insulating strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/126—Accessories for subsequent treating or working cast stock in situ for cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing

Definitions

  • the present invention relates to a continuous casting and rolling apparatus and a continuous casting and rolling method.
  • a layout is configured to directly roll a cut slab produced through a continuous casting process without cooling.
  • a tunnel furnace is installed as a space functioning as a buffer between a continuous casting device and a rolling device.
  • This tunnel furnace serves as a space for connecting two continuous casting devices and a single rolling device and as a buffer space when a certain amount of time is required for rolling mill replacement.
  • a heater having a gas heating method or an inducted heating method is installed to compensate for the temperature drop.
  • the slab produced in the continuous casting device is promptly transferred to the rolling device to be rolled, thereby causing a problem that an actual yield is significantly reduced because the slab in the tunnel furnace and that newly produced in the continuous casting device are scrapped when an abnormal operation of the rolling device occurs for a long period of time.
  • the conventional mini mill process is advantageous in terms of energy in that it employs the continuous casting device and the rolling device directly connected to each other according to a flow of a material but is disadvantageous in that its ability to cope with abnormal operations is inferior.
  • an exterior material of a vehicle or a product required to meet stringent surface quality requirements is subject to a scarfing process after produced using a cut slab, which removes a surface defect generated during the continuous casting.
  • a scarfing device needs to be installed online in consideration of the characteristics of the mini mill process, that is, the slab produced in the continuous casting device is promptly transferred to the rolling device.
  • the slabs, not subject to scarfing but in a region in which a scarfing device is installed are cooled when scarfing is performed for selective slabs.
  • the continuous casting device may not operate in the mini mill process, or rolling capacity of the rolling device may be wasted according to a slab production speed of the continuous casting device.
  • An object of the present disclosure is to provide a continuous casting and rolling apparatus for preventing a problem of a reduced actual yield of a slab while compensating for a temperature drop of the slab during an abnormal operation, and a continuous casting and rolling method.
  • Another object of the present invention is to provide a continuous casting and rolling apparatus for scarfing a slab during the continuous casting or preventing a problem of wasted capacity of a rolling device, and a continuous casting and rolling method.
  • a continuous casting and rolling apparatus may include a continuous casting device; a cutting device disposed on an outlet side of the continuous casting device and cutting an inner slab produced in the continuous casting device; a rolling device pressing a slab down and disposed downstream of the continuous casting device in a moving direction of the inner slab; a tunnel furnace provided between the cutting device and the rolling device and heating a slab located on a main path of the inner slab transferred from the continuous casting device to the rolling device; and a loading adjustment unit provided adjacent to the tunnel furnace, separating the slab on the main path from the tunnel furnace and introducing the slab onto the main path from an inlet side of the tunnel furnace.
  • the loading adjustment unit may include a drawing device provided adjacent to an outlet side of the tunnel furnace and separating the slab from the main path to be introduced onto a supplementary path; and an introducing device provided adjacent to the inlet side of the tunnel furnace and receiving the slab through the supplementary path to be introduced onto the main path
  • the loading adjustment unit may introduce the inner slab, separated from the main path of the outlet side of the tunnel furnace by the drawing device, onto a main path of the inlet side of the tunnel furnace by the introducing device.
  • the continuous casting and rolling apparatus may further include a reheating device on the supplementary path between the introducing device and the drawing device and heating the slab on the supplementary path.
  • the continuous casting and rolling apparatus may further include a scarfing device provided on the supplementary path between the introducing device and the drawing device and heating the slab on the supplementary path.
  • the introducing device may receive at least one of an inner slab produced in the continuous casting device and an outer slab transferred from the outside and introduce the same onto the main path.
  • a continuous casting and rolling method may include a process of supplying an inner slab, involving cutting an inner slab produced in a continuous casting device and supplying the same to a tunnel furnace; a rolling process involving pressing down the slab received from a main path of the slab moving through the tunnel furnace; and a subworking process performed between the process of supplying an inner slab and the rolling process and involving separating the slab on the main path from an outlet side of the tunnel furnace when the rolling process stops and introducing the slab onto the main path from an inlet side of the tunnel furnace when the rolling process resumes.
  • the subworking process may include a drawing process involving separating the slab on the main path from the outlet side of the tunnel furnace when the rolling process stops; and an introducing process involving receiving the slab separated from the main path of the outlet side of the tunnel furnace and introducing the same onto the main path of the inlet side of the tunnel furnace when the rolling process resumes.
  • the subworking process may include the introducing process subsequent to the drawing process so as to exclude intervention of another process therebetween, when the slab introduced onto the main path maintains a temperature for rolling.
  • the subworking process may further include a reheating process performed before the introducing process and involving heating the slab introduced onto the main path during the subworking process on the supplementary path when the slab has a temperature below the temperature for rolling.
  • the subworking process may further include a scarfing process performed before the introducing process and involving scarfing the slab separated from the main path of the outlet side of the tunnel furnace on the supplementary path through which the slab is delivered to be introduced onto the main path of the inlet side of the tunnel furnace.
  • the subworking process may further include a process of supplying an outer slab, performed before the introducing process and involving introducing the outer slab produced outside onto the supplementary path through which the slab separated from the main path of the outlet side of the tunnel furnace is delivered to be introduced onto the main path of the inlet side of the tunnel furnace.
  • the outer slab supply may be performed when capacity of the slab performing pressing down during the rolling process is larger than a supply amount of the inner slab.
  • the continuous casting and rolling apparatus and the continuous casting and rolling method of the present invention are advantageous in that a problem of a reduced actual yield of a slab can be prevented while a temperature drop of the slab can be compensated during an abnormal operation.
  • the continuous casting and rolling apparatus and the continuous casting and rolling method are advantageous in that scarfing can be performed for a slab during the continuous casting or a problem of wasted capacity of a rolling device can be prevented.
  • FIG. 1 is a layout diagram illustrating a moving path of a slab in the continuous casting and rolling apparatus of the present invention during an abnormal operation.
  • FIG. 2 is a layout diagram illustrating a moving path of a slab compensating for a temperature loss in the continuous casting and rolling apparatus during an abnormal operation.
  • FIG. 3 is a layout diagram illustrating a moving path for scarfing of a slab in the continuous casting and rolling apparatus.
  • FIG. 4 is a layout diagram illustrating a moving path for receiving an outer slab in the continuous casting and rolling apparatus.
  • FIG. 5 is a layout diagram illustrating a moving path for receiving an outer slab and performing scarfing in the continuous casting and rolling apparatus.
  • FIG. 6 is a diagram illustrating an order of the continuous casting and rolling method of the present invention.
  • FIG. 7 is a diagram illustrating a subworking process during the continuous casting and rolling method.
  • the present invention relates to a continuous casting and rolling apparatus and a continuous casting and rolling method.
  • a problem of a reduced actual yield of a slab can be prevented, and scarfing can be performed on a slab during the continuous casting.
  • a problem of wasted capacity of a rolling device 30 can be prevented.
  • FIG. 1 is a layout diagram illustrating a moving path of a slab in the continuous casting and rolling apparatus of the present invention during an abnormal operation.
  • a continuous casting and rolling apparatus may include a continuous casting device 10 ; a cutting device 20 disposed on an outlet side of the continuous casting device 10 and cutting an inner slab IS produced in the continuous casting device 10 ; a rolling device 30 pressing a slab down and disposed downstream of the continuous casting device 10 in a moving direction of the inner slab IS; a tunnel furnace 40 provided between the cutting device 20 and the rolling device 30 and heating a slab located on a main path MP of the inner slab IS transferred from the continuous casting device 10 to the rolling device 30 ; and a loading adjustment unit 50 provided adjacent to the tunnel furnace 40 , separating the slab on the main path MP from the tunnel furnace 40 and introducing the slab onto the main path MP from an inlet side of the tunnel furnace 40 .
  • the problem of a reduced actual yield which may be caused by a defect of the rolling device 30 or a scrapped slab during an abnormal operation in which a rolling operation such as a replacement of a transfer roll is impractical, may be prevented.
  • the slab located in the tunnel furnace 40 or that produced by molten steel remaining in the continuous casting device 10 is separated from a main path MP of an outlet side of the tunnel furnace 40 by the loading adjustment unit 50 during the abnormal operation and introduced onto a supplementary path SP.
  • the slab on the supplementary path SP is reintroduced onto the main path MP of an inlet side of the tunnel furnace 40 , thereby increasing a time for which the slab is positioned on a moving path.
  • the slab By securing a bypass, on which the slab remains without entering the rolling device 30 , the slab can be prevented from being wasted by the scrap treatment due to insecurity of the path on which the slab remains.
  • the loading adjustment unit 50 introduces the slab introduced onto the main path MP onto an inlet side of the tunnel furnace 40 , thereby compensating for a temperature of the slab lowered during its transfer through the supplementary path SP by a temperature at which the rolling can be performed.
  • the continuous casting device 10 may serve to produce an inner slab IS from the molten steel through a casting process. That is, the continuous casting device 10 supplies the molten steel to a mold in a tundish, and the supplied molten steel forms a cast while depriving heat.
  • the inner slab IS is guided by a segment roll and a pinch roll and may be moved and supplied to the rolling device 30 to be described later.
  • Such continuous casting device 10 produces the internal cast steel IS depending on a solidification speed of the molten steel, it is difficult to control a production speed. Accordingly, production of a product by continuously receiving the inner slabs IS produced in the continuous casting device 10 and pressing down the same using the rolling device 30 has a limitation of a speed.
  • the inner slab released from the continuous casting device 10 has a high average temperature, it is advantageous in that a temperature required during the rolling operation can be guaranteed.
  • the cutting device 20 can serve to control whether a slab (inner slab IS or outer slab OS) performing the rolling in the rolling device 30 is provided as in a continuous form of being connected to the continuous casting device 10 or in a discontinuous form of being separated from the continuous casting device 10 . To this end, the cutting device 20 is provided on an outlet side of the continuous casting device 10 .
  • the rolling device 30 receives the inner slab IS produced in the continuous casting device 10 in the continuous form of being connected to the continuous casting device 10 to perform the rolling.
  • the rolling device 30 receives the inner slab IS in the discontinuous form of being separated from the continuous casting device 10 to perform the rolling.
  • the cutting device 20 cuts the slab.
  • the rolling device 30 receives a slab, such as the inner slab IS produced in the continuous casting device 10 or an outer slab OS provided from outside, and presses the same to produce a natural or after product.
  • the rolling device 30 can allow the slab to go through a pair of rolling rolls to roll the slab, and several rolling stands providing such a pair of the rolling rolls may be provided.
  • the rolling device 30 can roll the slab while setting various rolling thicknesses.
  • the rolling device 30 may be provided as a rough rolling device 30 and a finish rolling device 30 .
  • the rough rolling device 30 has a configuration in which a slab produced in the continuous casting device 10 is first rolled, whereas the finish rolling device 30 has a configuration in which the slab rolled in the rough rolling device 30 is finish-rolled.
  • the finish rolling device 30 does not perform the rolling but may allow pairs of the rolling rolls to freepass the slab.
  • the rough rolling device 30 does not perform the rolling but may allow the pairs of the rolling rolls to freepass the slab.
  • a heater for adjusting a rolling temperature of the slab or a scale-remover removing a scale may be provided on the inlet side of the rough rolling device 30 or the finish rolling device 30 .
  • the tunnel furnace 40 serves to maintain or increase a rolling temperature of the slab when transferring the slab to the rolling device 30 and rolling.
  • the tunnel furnace 40 is provided between the continuous casting device 10 and the rolling device 30 and heats the slab, such as the inner slab IS produced in the continuous casting device 10 or an outer slab OS provided from outside, to maintain or increase the rolling temperature of the slab.
  • a material of the slab can also be adjusted.
  • the tunnel furnace 40 may be provided with a heating means such as a gas heating method, an induced heating method, or the like, and the tunnel furnaces 40 may be provided in plural according to a length thereof.
  • the slab is separated to the supplementary path SP from the main path MP of the inner slab IS delivered to the rolling device 30 from the continuous casting device 10 the tunnel furnace 40 on the outlet side of the tunnel furnace 40 .
  • the loading adjustment unit 50 introducing the slab from the supplementary path SP onto the main path MP may be connected to the inlet side of the tunnel furnace 40 .
  • the loading adjustment unit 50 serves to separate a slab from the main path MP to be introduced onto the supplementary path SP on the outlet side of the tunnel furnace 40 while separating the slab from the supplementary path SP onto the main path MP on the inlet side of the tunnel furnace 40 . This is to prevent the problems that the slab is scrapped and the actual yield thereof is lowered in presence of a defect of the rolling device 30 or a scrapped slab during an abnormal operation in which a rolling operation such as a replacement of a transfer roll, by expanding the path on which the slab remains to the supplementary path SP. This enables the slab to remain on the main path MP and the supplementary path SP without being abandoned until the operation is back to normalize.
  • the loading adjustment device may include a drawing device 51 and an introducing device 52 . That is, the loading adjustment unit 50 of the continuous casting device according to an exemplary embodiment of the present invention is provided adjacent to the outlet side of the tunnel furnace 40 and to the inlet side of the tunnel furnace 40 and the drawing device 51 separating the slab from the main path MP to be introduced onto the supplementary path SP.
  • the loading adjustment unit 50 may include the introducing device 52 receiving the slab through the supplementary path SP to be introduced onto the main path MP.
  • the drawing device 51 located on the outlet side of the tunnel furnace 40 , serves to deliver the slab from the main path MP to the supplementary path SP. Accordingly, the moving path of the slab is expanded by changing the moving path of the slab toward the rolling device 30 from the outlet side of the tunnel furnace 40 to the supplementary path SP.
  • Such drawing device 51 may include a pusher pushing the slab on the transfer roll, but is not limited thereto. Any drawing device 51 can be used in the present invention as long as the slab can be delivered from the main path MP to the supplementary path SP.
  • the introducing device 52 located on the inlet side of the tunnel furnace 40 , serves to deliver the slab from the supplementary path SP to the main path MP. Accordingly, the slab separated from the outlet side of the tunnel furnace 40 can be delivered toward the rolling device 30 .
  • the introducing device 52 enables the slab to be heated, thereby increasing the temperature of the slab, which has lowered while being transferred to the supplementary path SP, to a temperature at which the slab can be rolled.
  • the introducing device 52 may include a pusher pushing the slab on the transfer roll, but is not limited thereto. Any introducing device 52 can be used in the present invention as long as the slab can be delivered from the supplementary path SP to the main path MP.
  • the loading adjustment unit 50 of the continuous casting device may serve to introduce the inner slab IS separated from the main path MP of the outlet side of the tunnel furnace 40 by the drawing device 51 onto the main path MP of the inlet side of the tunnel furnace 40 by the introducing device 52 .
  • the slab can be configured to transfer while forming the supplementary path SP directly connecting the introducing device 52 to the drawing device 51 .
  • a length thereof may be reduced depending on a number of the slabs to remain.
  • the length of the supplementary path SP is defined in consideration of an amount of the slab cooled on the supplementary path SP. That is, the temperature of the slab on the inlet side of the rolling device 30 in consideration of the amount of the cooled slab reduced on the supplementary path SP and a degree of a temperature increase in the tunnel furnace 40 added to the slab needs to be higher than a temperature at which the rolling is feasible. In such relationship, a maximum distance of the supplementary path SP is defined.
  • FIG. 2 is a layout diagram illustrating a moving path of a slab compensating for a temperature loss in the continuous casting and rolling apparatus during an abnormal operation.
  • the continuous casting device according to an exemplary embodiment is provided on the supplementary path SP between the drawing device 51 and the introducing device 52 and may include a reheater 60 heating the slab on the supplementary path SP.
  • the reheater 60 is further provided on the supplementary path SP as described above because the range for compensating for the temperature drop (cooling amount) of the remained slab on the path in the tunnel furnace 40 is exceeded according to an increasing amount of the slab, which needs to remain on the supplementary path SP.
  • Such reheater 60 may be configured as the tunnel furnace 40 . That is, the reheater 60 may be provided with a heating means such as a gas heating method, an induced heating method, or the like, and may be provided in plural according to a length of a section which is heated.
  • a heating means such as a gas heating method, an induced heating method, or the like
  • FIG. 3 is a layout diagram illustrating a moving path for scarfing of a slab in the continuous casting and rolling apparatus.
  • the continuous casting device may include a scarfing device 70 provided between the introducing device 52 and the drawing device 51 on the supplementary path SP and scarfing the slab on the supplementary path SP.
  • the scarfing device 70 serves to scarf the inner slab IS or the outer slab OS according to a need of a product to be produced.
  • the scarfing device 70 is provided on the supplementary path SP, not on the main path MP, a problem that a slab, which does not need to be scarfed, is unnecessarily cooled due to unnecessary waste of the main path MP is prevented. Further, selective scarfing is feasible for the slab in need of being scarfed.
  • FIG. 4 is a layout diagram illustrating a moving path for receiving an outer slab in the continuous casting and rolling apparatus
  • FIG. 5 is a layout diagram illustrating a moving path for receiving an outer slab and performing scarfing in the continuous casting and rolling apparatus.
  • the introducing device 52 of the continuous casting device is configured to receive at least one of the inner slab IS produced in the continuous casting device 10 or the outer slab OP delivered from outside to introduce the same onto the main path MP.
  • the introducing device 52 is not limited to providing the inner slab IS produced in the continuous casting device 10 to the rolling device 30 and rolling the same; the introducing device 52 is configured to introduce the slabs produced outside, thereby preventing rolling capacity of the rolling device 30 from being wasted. This may serve to increase a production yield of a product produced by the rolling device 30 .
  • a plurality of the continuous casting devices 10 may be connected to a single rolling device 30 to form the main path MP.
  • a moving path of the slab connecting the main continuous casting device 10 and the rolling device 30 is formed as the main path MP, and the slab produced in another continuous casting device 10 is delivered to the rolling device through the supplementary path SP.
  • a moving path passing the scarfing device 70 may be configured.
  • a moving path passing the reheater 60 may be configured when additional heating is required.
  • FIG. 6 is a diagram illustrating an order of the continuous casting and rolling method of the present invention.
  • a continuous casting and rolling method involves a process of supplying an inner slab, involving cutting an inner slab produced in a continuous casting device 10 and supplying the same to a tunnel furnace 40 ; a rolling process involving pressing down the slab received from a main path MP of the slab moving through the tunnel furnace 40 ; and a subworking process performed between the inner slab supply process and the rolling process and involving separating the slab on the main path MP from an outlet side of the tunnel furnace 40 when the rolling process stops and introducing the slab onto the main path MP from an inlet side of the tunnel furnace 40 when the rolling process resumes.
  • the subworking process may serve to prevent a problem of a reduced actual yield, which may be caused by a defect of the rolling device 30 or a scrapped slab during an abnormal operation in which a rolling operation such as a replacement of a transfer roll is impractical.
  • the slab located in the tunnel furnace 40 or that produced by molten steel remaining in the continuous casting device 10 is separated from the main path MP of the outlet side of the tunnel furnace 40 to be introduced onto the supplementary path SP during the abnormal operation.
  • the slab on the supplementary path SP is introduced onto the main path MP of the inlet side of the tunnel furnace 40 , thereby increasing a time for which the slab is positioned on a moving path.
  • the slab By securing a bypass, on which the slab remains without entering the rolling device 30 , the slab can be prevented from being wasted by the scrap treatment due to insecurity of the path on which the slab remains.
  • the slab introduced onto the main path MP is limited to be introduced onto the inlet side of the tunnel furnace 40 , thereby compensating for a temperature of the slab lowered during its transfer through the supplementary path SP by a temperature at which the rolling can be performed.
  • the process of supplying an inner slab involves producing of the inner slab IS using molten steel in the continuous casting device 10 , and the rolling process involves pressing down the slab by the rolling device 30 to produce as a rolling product.
  • the subworking process involves producing the supplementary path SP in addition to the main path, through which the inner slab IS is delivered to the continuous casting device 10 and the rolling device 30 such that the problem that the slabs are disposed during abnormal operations is prevented.
  • the subworking process of the continuous casting and rolling method may include a drawing process involving separating the slab on the main path from the outlet side of the tunnel furnace when the rolling process stops; and an introducing process involving receiving the slab separated from the main path of the outlet side of the tunnel furnace and introducing the same onto the main path of the inlet side of the tunnel furnace when the rolling process resumes.
  • the drawing and introducing processes are performed while not allowing another process to intervene therebetween such that an additional process is not performed on the supplementary path SP, and this facilitates a configuration of the slab remaining on the path.
  • the subworking process of the continuous casting and rolling method includes the introducing process subsequent to the drawing process so as to exclude intervention of another step therebetween, when the slab introduced onto the main path maintains a temperature for rolling when the slab introduced onto the main path maintains at least a temperature for rolling.
  • the subworking process is performed for a case in which a period of time for the abnormal operation is short enough that a cooling amount can be compensated in the tunnel furnace 40 while the slab remains on the supplementary path SP.
  • the cooling amount of the slab remaining on the supplementary path SP increases, thereby disabling to secure the rolling temperature.
  • the slab is reheated between the introducing and drawing processes.
  • the subworking process of the continuous casting and rolling method may include a reheating process performed before the introducing process and involving heating the slab introduced onto the main path MP during the subworking process on the supplementary path SP when the slab has a temperature below the rolling temperature.
  • the reheating process may be performed in the reheater 60 provided on the supplementary path SP.
  • the subworking process of the continuous casting and rolling method may include a scarfing process performed before the introducing process and involving scarfing the slab separated from the main path MP of the outlet side of the tunnel furnace 40 on the supplementary path SP through which the slab piece is delivered to be introduced onto the main path MP of the inlet side of the tunnel furnace 40 .
  • the scarfing process may be performed in the case of producing an exterior material of a vehicle or a product required to meet stringent surface quality requirements.
  • the scarfing process is performed in a scarfing device 70 provided on the supplementary path SP. This may prevent a problem of the main path MP elongated by the scarfing device 70 as well as a problem of the slab on the main path MP being cooled.
  • the subworking process of the continuous casting and rolling method may include a process of supplying an outer slab, performed before the introducing process and involving introducing the outer slab OS produced outside onto the supplementary path SP through which the slab separated from the main path MP of the outlet side of the tunnel furnace 40 is delivered to be introduced onto the main path MP of the inlet side of the tunnel furnace 40 .
  • the subworking process is not limited to providing the inner slab IS during the inner slab supply process, and further includes supplying an outer slab OS introduced from outside.
  • the process of supplying an outer slab supply is further performed such that the problem of capacity of the rolling device 30 being wasted is prevented.
  • the outer slab supply process of the continuous casting and rolling method according to another exemplary embodiment is performed when capacity of the slab pressed during the rolling process is larger than an amount of the inner slab IS being supplied.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
US16/759,046 2017-11-03 2018-11-02 Continuous casting and rolling apparatus and continuous casting and rolling method Abandoned US20200331045A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR10-2017-0145823 2017-11-03
KR1020170145823A KR101998966B1 (ko) 2017-11-03 2017-11-03 연주압연장치 및 연주압연방법
PCT/KR2018/013277 WO2019088771A1 (ko) 2017-11-03 2018-11-02 연주압연장치 및 연주압연방법

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220088654A1 (en) * 2020-09-24 2022-03-24 Primetals Technologies Austria GmbH Combined casting and rolling installation and method for operating the combined casting and rolling installation

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110253305B (zh) * 2019-06-24 2020-03-31 包头市一禾稀土铝业科技材料有限公司 一种脱氧铝块的快速制备方法及其设备
KR102370393B1 (ko) * 2020-05-28 2022-03-04 현대제철 주식회사 슬라브 측면 결함 방지 장치 및 방법
CN112122343B (zh) * 2020-09-09 2022-09-06 山西云时代太钢信息自动化技术有限公司 一种小断面铸坯快速直送系统平台
WO2023186471A1 (de) * 2022-03-29 2023-10-05 Sms Group Gmbh GIEßWALZANLAGE UND VERFAHREN ZU DEREN BETRIEB

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS533949A (en) * 1976-07-02 1978-01-14 Hitachi Ltd Direct feed rolling line
JPH0381012A (ja) 1989-08-22 1991-04-05 Kawasaki Steel Corp 直接圧延工程における熱補償装置
DE4017928A1 (de) * 1990-06-05 1991-12-12 Schloemann Siemag Ag Verfahren und anlage zur herstellung von warmgewalzten baendern oder profilen aus stranggegossenem vormaterial
US5579569A (en) 1992-05-12 1996-12-03 Tippins Incorporated Slab container
JP2845087B2 (ja) 1993-05-13 1999-01-13 株式会社日立製作所 鋳造熱間圧延連続設備
JPH0747418A (ja) * 1993-08-09 1995-02-21 Ishikawajima Harima Heavy Ind Co Ltd 熱間圧延設備
TW336184B (en) * 1995-01-11 1998-07-11 Tippins Inc Intermediate thickness slab caster and inline hot strip and plate line, method of processing metal slabs and slab container
CN1070393C (zh) * 1995-03-03 2001-09-05 株式会社东芝 热轧装置
DE19621259A1 (de) 1996-05-25 1997-11-27 Schloemann Siemag Ag Verfahren und Anlage zur Herstellung von Edelstahl- oder Kohlenstoffstahlblech aus durch Strangguß erzeugten Dünnbrammen
DE19712212A1 (de) 1997-03-24 1998-10-01 Schloemann Siemag Ag Verfahren und Anlage zum Auswalzen von Warmbreitband aus stranggegossenen Brammen
DE19953252A1 (de) 1999-11-04 2001-05-10 Sms Demag Ag Verfahren zur Oberflächenbearbeitung eines kontinuierlich gegossenen Stahlproduktes und Einrichtung hierzu
DE10252246A1 (de) 2002-11-07 2004-05-27 Sms Demag Ag Verfahren und Anlage zur Oberflächenbehandlung innerhalb einer Stranggießanlage
DE10304318C5 (de) 2003-02-04 2015-10-15 Sms Group Gmbh Verfahren zum Walzen von dünnen und/oder dicken Brammen aus Stahlwerkstoffen zu Warmband
JP2005262255A (ja) 2004-03-17 2005-09-29 Kawasaki Heavy Ind Ltd 熱延鋼帯製造設備、同設備の構成方法および熱延鋼帯製造方法
DE102008020412A1 (de) 2007-08-24 2009-02-26 Sms Demag Ag Verfahren und Vorrichtung zum Herstellen eines Metallbandes durch Gießwalzen
KR20090050188A (ko) 2007-11-15 2009-05-20 재단법인 포항산업과학연구원 연속주조설비의 슬라브 표면결함 제거방법
KR101189516B1 (ko) * 2010-02-08 2012-10-10 주식회사 포스코 주편 처리 방법 및 주편 처리 시스템
KR101417230B1 (ko) 2011-12-28 2014-08-06 주식회사 포스코 배치 및 연연속 압연 겸용 시스템 및 압연 방법
CN103464463B (zh) * 2013-09-26 2015-04-08 湖北中钢联冶金工程有限公司 连铸连轧一体装置及工艺
WO2015099372A1 (ko) 2013-12-23 2015-07-02 주식회사 포스코 주편 스카핑 장치 및 그 제어방법
KR101676138B1 (ko) * 2014-12-24 2016-11-15 주식회사 포스코 연주압연방법 및 연주압연장치
CN107008750B (zh) * 2017-04-20 2019-10-11 中冶南方工程技术有限公司 双通道长材连铸连轧生产线及其生产方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220088654A1 (en) * 2020-09-24 2022-03-24 Primetals Technologies Austria GmbH Combined casting and rolling installation and method for operating the combined casting and rolling installation

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EP3705198A4 (de) 2020-12-23
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