JP5633419B2 - Slab verification method and transfer control device when charging furnace - Google Patents

Description

  The present invention relates to a method of improving workability of collating slabs for preventing dissimilar material charging in a heating furnace facility for manufacturing steel products by hot rolling.

  The purpose of slab verification in the heating furnace equipment is to prevent the rolling of dissimilar slabs and the shipment of dissimilar products to customers, which cause long-term production stoppage of the hot rolling equipment. Therefore, in the past, when inserting into the heating furnace, the operator visually confirms whether each slab is scheduled to be rolled, and based on the operator's judgment, charging to the heating furnace and returning to the slab yard Had gone.

  Although the verification operation itself of the heating furnace charging slab can be verified in less than 30 seconds per slab, the slab charging into the heating furnace cannot be performed unless there is a space that can be charged in the heating furnace. Therefore, the slab charging depends on the rolling pitch, and a collation operation for one slab occurs every 2 to 5 minutes depending on the rolling pitch. However, even if there is a vacant time of about 2 to 5 minutes, the charging operator cannot leave the place and perform other operations with this vacant time. As a result, the charging operator was eventually stuck to the heating furnace equipment and the workability was poor.

  Here, as a prior art for automating the charging operation, for example, in Patent Document 1, when manufacturing a steel bar or wire by hot rolling, the billet is marked on the end face before charging the billet into the heating furnace. Steel bills that read characters and symbols, transfer the read data to the computer that performs the tracking, verify the actual product, and load the billet into the furnace while matching the loading order in the computer. An outbreak prevention system is disclosed.

Patent Document 2 discloses a slab no. When the slab marked with is inserted into the heating furnace, the slab no. Is taken with the camera and the actual slab No. In addition, the slab is photographed with a camera and image-processed to determine the actual slab size. Is collated with the slab information in the conveyance control device, and a slab collation method for preventing the generation of different materials in front of the heating furnace is disclosed.
Further, in Patent Document 3, in order to reliably detect characters marked on the rolling coil, the marking characters are photographed by sequentially illuminating the marking characters from a plurality of different directions, and character recognition is performed using one of the obtained image signals. A character detection device is disclosed that performs character recognition using other image signals sequentially when character recognition is not possible.

JP-A-8-164407 Japanese Patent Laid-Open No. 11-124630 JP-A-5-290214

However, as disclosed in Patent Documents 1 to 3 and the like, although an automatic verification method using a slab number using a marking reading device is also conceivable, technical problems such as the accuracy of the reading device and the sharpness of the marking itself are not known. However, it cannot be said that it has been solved at a practical level as a method for collating slabs when charging a heating furnace.
That is, as disclosed in Patent Document 3, as compared with the characters marked on the rolling coil, a technique for reliably automatically detecting the characters marked on the slab at the time of charging the heating furnace is under development. As a slab matching method at the time of charging a heating furnace, it is actually difficult to perform complete matching only by image processing. Therefore, if a different material is missed during extraction from the heating furnace, the hot rolling equipment will be stopped for a long time, or a product with completely different properties will be shipped to the customer. It is necessary to place an operator on the side and make sure to check each slab. In the end, it was indispensable to arrange operators on the charging side, which was a bottleneck for rationalizing the charging work.

Therefore, the present invention has been made paying attention to such a problem, and in the collation operation of the slab for preventing the charging of different materials performed in the heating furnace equipment before charging into the hot rolling equipment. An object of the present invention is to provide a slab collation method and a conveyance control device at the time of charging a heating furnace that can surely collate an actual slab with slab information corresponding to the slab and rationalize the charging operation.

In order to solve the above-mentioned problems, the slab collation method at the time of charging a heating furnace according to the present invention is an actual slab in which the slab number associated with the slab information capable of calculating the weight is marked on the surface. A method for collating the slab information with an actual slab corresponding to the slab information, which is used in a heating furnace facility provided with a transfer control device for performing a process of charging into a heating furnace, and a primary determination step by the processing of the transfer control device And a temporary verification slab information generation step of generating temporary verification slab information for secondary determination to be verified by an operator's visual inspection through processing by the transport control device, wherein the primary determination step is based on the slab information It is determined whether or not the difference between the calculated calculated weight and the actual measured weight of the actual slab is within a predetermined allowable value. Only when it is within the predetermined allowable value, the actual slab is moved into the heating furnace. Permit charging, the temporary verification slab information generation step, said secondary determination to an operator capable collation, the slab number acquired by imaging a real slab is automatically charged through the primary determination step And temporary slab information stored so as to simultaneously display images of the slab information associated with the actual slab at the time of insertion.
Moreover, in order to solve the said subject, the conveyance control apparatus based on this invention is used for the heating furnace equipment among this invention, and the slab number linked | related with the slab information which can calculate a weight was marked on the surface. A transport control device that performs processing for charging the actual slab into the heating furnace, and at the time of charging the heating furnace, primary determination means that executes processing for comparing the slab information with the actual slab corresponding thereto, Provisional collation slab information generating means for generating provisional collation slab information for secondary judgment collated by visual inspection by an operator, wherein the primary judgment means calculates the calculated weight and actual slab based on the slab information It is determined whether or not the difference from the actually measured weight is within a predetermined allowable value, and the charging of the actual slab into the heating furnace is permitted only when it is within the predetermined allowable value. Information generator The slab number obtained by imaging the actual slab that is automatically inserted through the processing of the primary determination means and associated with the actual slab at the time of loading so that the operator can verify the secondary determination Temporary collation slab information stored so as to display images of the slab information simultaneously is generated.

According to the present invention , only when the difference between the calculated weight calculated from the slab information and the actually measured weight of the actual slab is within a predetermined allowable value, the actual slab is automatically charged into the heating furnace. The operator can reduce the monitoring burden by the primary determination automatically performed by the transport control device based on the weight. Since the data related to the weight that is the basis of the primary determination is based on the weight rather than the image processing, it can be reliably performed regardless of the marking state of the slab. Therefore, even if it is adopted as a slab verification method when charging a heating furnace, its reliability is high.

  The subsequent secondary determination itself is carried out by visual judgment of the operator, but the temporary verification slab information for secondary determination monitored by the operator at this time is the actual slab that is automatically inserted through the primary determination step. Since the slab number acquired by imaging and the slab information linked to the actual slab at the time of charging are generated as temporary verification slab information stored so as to display an image at the same time, after charging in the heating furnace Then, a plurality of actual slabs set with the provisional verification slab information are sequentially displayed as images, and this is visually checked by the operator, and the appropriate one is extracted as it is from the heating furnace and heated in a hot rolling facility. It is possible to perform hot rolling and to judge that the other is not a different material and prevent rolling in the hot rolling equipment.

  That is, the heating furnace operator can collectively perform a collation operation of a plurality of slabs in the secondary determination step. Therefore, for example, the operator can secure a collective work time of 30 minutes or more. Therefore, it is possible to significantly reduce the work time of the furnace charging work compared to the conventional case, thereby making it possible to rationalize the charging operation, and the operator can perform other work in the idle time by this rationalization. it can.

  Further, in the marking reading method described in the above prior art, the reading rate depends on the marking display state, but since this determination is made visually by the operator, even if the marking display state is poor. The collation is possible, and even if the marking is made on the cut surface of the slab, it can be adopted as a slab collation method when charging the heating furnace without any problem.

Here, in the slab collation method at the time of charging the heating furnace according to the present invention, the method further includes a provisional collation slab distribution step by the processing of the transfer control device, and the provisional collation slab distribution step is performed through the primary determination step. If the information obtained as a result of the operator collating the slab number of the actual slab loaded into the slab and the slab information associated with the slab at the time of loading is not input to the transfer control device, Even when the slab is ready to be rolled, it is preferable not to allow extraction to the hot rolling equipment because it is not verified.
Similarly, the conveyance control apparatus according to the present invention further includes a temporary collation slab distribution unit, and the temporary collation slab distribution unit is a slab of an actual slab that has been charged into the heating furnace through the processing in the primary determination unit. When the information obtained as a result of the operator collating the number and the slab information associated with the number at the time of charging is not input to the transfer control device, the actual slab can be rolled. Even if it is, it is preferable not to permit extraction to the hot rolling equipment because it is not verified.
With such a configuration, extraction of different materials into the hot rolling facility due to operator monitoring omission is prevented.
Further, in the slab collation method at the time of charging the heating furnace according to the present invention, the provisional collation slab distribution step includes that when the result information is not input to the transfer control device , the corresponding actual slab is placed at a predetermined tracking position. It is preferable to issue an alarm when it is reached.
Similarly, in the transport control device according to the present invention, the temporary collation slab distribution means, when the information of the result is not input to the transport control device, when the corresponding actual slab reaches a predetermined tracking position, It is preferable to issue an alarm.
With such a configuration, the operator can be alerted to monitor.

As described above , according to the present invention , in the slab collation work for preventing dissimilar material charging performed in the heating furnace facility before charging into the hot rolling facility, the actual slab and the corresponding slab information and Can be reliably verified and the charging operation can be rationalized.

It is a figure explaining one Embodiment of the heating furnace installation provided with the conveyance control apparatus which performs the program of the slab collation method at the time of charging the heating furnace which concerns on this invention. It is a block diagram explaining the conveyance control apparatus with which the heating furnace equipment shown in FIG. It is a flowchart explaining the primary determination process and temporary collation slab information generation process which are performed with a conveyance control apparatus. It is a flowchart explaining the temporary collation slab distribution process performed with a conveyance control apparatus.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.
As shown in FIG. 1, this heating furnace equipment includes a slab yard 1 in which a slab payout crane (not shown) is arranged adjacently, a payout table 2 on which a slab discharged by the payout crane is placed, and a payout table. 2 for measuring the weight of the slab transported in 2, a camera 6 arranged so as to be able to image the slab on the scale 3, and heating in a plurality of rows (in this example, 4 rows) for heating the slab. Among the slabs whose slab weights are actually measured by the furnace 7 and the weighing device 3, the charging table 4 on which the slab to be charged in the heating furnace 7 is placed, and the slab that is not charged in the heating furnace 7 are returned. It is performed in this heating furnace equipment, such as the return table 5, the extraction table 8 for transporting the slab heated through the heating furnace 7 to the subsequent hot rolling equipment, and the tracking processing of the slab charged into the heating furnace 7. Series And a conveyance control unit 10 that executes the process.

  As shown in FIG. 2, the transfer control device 10 includes a CPU 30 that controls operations and the entire system based on a predetermined control program, a storage device 42 that stores a control program for the CPU 30 in a predetermined area, and a ROM 32. A RAM 34 for storing data read from the storage device 42, the ROM 32, etc., and a calculation result necessary for the calculation process of the CPU 30, a weighing device 3, a camera 6, an input device 40, a storage device 42, a display device 44, etc. And an interface 38 that mediates data input / output, and these are connected to each other via a bus 39, which is a signal line for transferring data, so that data can be exchanged. Then, the CPU 30 activates a predetermined program stored in a predetermined area of the storage device 42 or the ROM 32, and executes the following primary determination process, provisional collation slab information generation process, and provisional collation slab distribution process according to the program. It is like that.

Hereinafter, the primary determination process, the temporary collation slab information generation process, and the temporary collation slab distribution process will be described. The primary determination process, the provisional collation slab information generation process, and the provisional collation slab distribution process are always performed as interrupt processes while the furnace is operating.
As shown in FIG. 3, the primary determination process (primary determination process) and the temporary collation slab information generation process (temporary collation slab information generation process) are first shifted to step S11 and the slab (Sb on the weighing instrument 3). ) Is obtained as weighing information, and the process proceeds to step S12. In step S12, the slab number A of the actual slab (Sb) imaged by the camera 6 is obtained as imaging information. In the subsequent step S13, the calculated weight is calculated by referring to the slab information (slab thickness, width, length and specific gravity) from which the weight can be calculated from the storage device 42, and the process proceeds to step S14.

  In step S14, it is determined whether or not the difference between the calculated weight calculated based on the slab information and the actually measured weight of the actual slab is within a predetermined allowable value (± 7%) (primary determination processing). That is, if it is within a predetermined allowable value (for example, ± 7%) (Yes), the process proceeds to Step S15, and if not (No), the process proceeds to Step S16. In step S15, temporary verification slab information is generated (temporary verification slab information generation processing). Here, the provisional verification slab information generation process is associated with the slab number A obtained by imaging the actual slab that is automatically inserted into the heating furnace 7 through the primary determination and the actual slab at the time of charging. Temporary collation slab information stored so as to display the slab information B simultaneously (see FIG. 3) is generated. In step S <b> 16, the actual slab that fails the primary determination is determined to be a different material, conveyed by the return table 5, and returned to the heating furnace 7 so as not to be charged. On the other hand, in step S17 following step S15, the actual slab that passed the primary determination is charged into the heating furnace 7 and the process is returned.

  Next, as shown in FIG. 4, the temporary collation slab distribution process first proceeds to step S21, where the operator moves the actual slab charged into the heating furnace 7 from the input device 40 through the primary determination step. The presence / absence of information (verification result information) as a result of collating the slab number A with the slab information B associated with the slab number A is acquired. In the display device 44, the slab information B associated with the charging time of the temporary collation slab (Sd) is displayed together with the actual slab number A of the slab (Sd) and a plurality of temporary collation slabs (Sg, Sf). , Se...) Can be displayed sequentially, and if the slab number A and the slab number of the slab information B coincide with each other, the input device indicates that the collation has been completed (passed). If the information is input as the collation result information from 40 and the two do not match, the different material information indicating that the material is different is input from the input device 40.

  In subsequent step S22, the presence / absence of the collation result information acquired in step S21 is referred to. Then, as a predetermined tracking position, it is monitored whether or not the slab (Sf) in the second row from the outlet side of the heating furnace 7 is a slab having collation result information (collation slab). If this slab (Sf) is a collation slab (Yes), the process proceeds to step S24; otherwise (No), the process proceeds to step S23. In step S23, a warning that a non-collation slab or a different material remains is given by displaying an alarm for a collation request to the operator by display on the display device 44, voice, or the like, and the process returns to step S21.

  In step S24, the presence / absence of the collation result information acquired in step S21 is referred to, and it is monitored whether or not the slab (Sg) in the first row from the outlet side of the heating furnace 7 is a slab having collation result information (collation slab). To do. And if this slab (Sg) is a collation slab (Yes), it will transfer to step S25, and an extraction designation | designated can be received and a process is returned. On the other hand, if the slab (Sg) is not a collation slab (No), the process proceeds to step S26, where a different material judgment that the extraction of the slab (Sg) into the hot rolling facility is not permitted is performed, and the process is returned. At this time, it is preferable to issue an alarm to each of the heating furnace operator and the rolling operator that the verification result information has not been input.

Next, the operation of the heating furnace facility and the operation and effect of the slab verification method when charging the heating furnace in the heating furnace facility will be described.
In this heating furnace equipment, the slabs in the slab yard 1 are identified for each slab by the host computer, and the corresponding slabs (Sa) are determined in the order of slab charging set based on the hot rolling plan. Discharge from slab yard 1 with a crane. Information on the slab (Sa) paid out on the payout table 2 is transmitted to the transport control device 10 (process computer). The conveyance control apparatus 10 tracks the slab conveyance positions (Sa to Sg).
The slab (Sb) conveyed to the weigher 3 is temporarily stopped on the weigher 3 and the weight is actually measured (step S11), and the slab number A of the actual slab (Sb) is imaged by the camera 6 ( Step S12). Further, the calculated weight is calculated based on the slab information (slab thickness, width, length, and specific gravity) possessed by the conveyance control device 10 (step S13).

  Next, the transport control device 10 temporarily determines whether or not the slab (Sb) is a different material (step S14). That is, the calculated slab calculated weight and the actually measured slab weight are compared, and if the difference between the calculated weight and the actually measured weight is within an allowable value (for example, ± 7%), the primary determination is passed. Temporary collation slab information is set for the slab (Sb) that has passed the primary determination (step S15), and charging into the heating furnace 7 is permitted (step S17). When the charging table 4 is empty, the slab (Sb) on the weighing instrument 3 is automatically sent to the charging table 4 as a temporary verification slab (Sd) and automatically charged into the heating furnace 7. . On the other hand, if the slab (Sb) is a different material, the slab (Sc) is transported by the return table 5 and is not charged into the heating furnace 7 (step S16).

  Thus, according to the slab collation method at the time of charging the heating furnace in this heating furnace facility, the difference between the calculated weight calculated from the slab information and the actual weight of the actual slab (Sb) is a predetermined allowable value (for example, Since the actual slab (Sb) is automatically charged into the heating furnace 7 only when it is within ± 7%), the operator makes a primary determination (step) automatically performed by the transport control device 10 based on the weight. The monitoring burden is reduced by S14). Since the data related to the weight that is the basis of the primary determination is based on the weight rather than the image processing, it can be reliably performed regardless of the marking state of the slab. Therefore, even if it is adopted as a slab verification method when charging a heating furnace, its reliability is high.

  Here, the provisional collation slab information set as described above includes the slab number A of the marking surface obtained by capturing the actual slab with the collation camera 6 and the slab information B associated with the actual slab at the time of insertion. Are simultaneously stored in the storage device 42 as a composite image for image display (see FIG. 3). In this embodiment, one piece of composite image data is stored. However, if the captured image and the slab information are displayed simultaneously, the data storage itself is separate. Also good.

  Then, the operator of the heating furnace collates the temporary collation slab information with the display device 44 at an appropriate time while corresponding to a predetermined charging time. That is, the temporary verification slab (Sd) charged in the heating furnace 7 is stored in the actual slab number A and the conveyance control device 10 shown in FIG. The slab number (slab information B) is visually checked (secondary determination). The slab number (slab information B) of the temporary verification slab (Sd) is displayed on the display device 44 at the same time as the actual slab number A in association with the charging time of the slab (Sd), and a plurality of temporary verification slabs (Sg, Sf, Se... Is displayed, so that the heating furnace operator can display a plurality of temporary verification slabs (Sg, Sf, Se,...) -) The slab number A on the surface and the slab information B tracked by the slab number A can be sequentially confirmed visually. If the plurality of temporary collation slabs (Sg, Sf, Se...) Loaded are not different materials, a feed permission instruction to the extraction table 8 is conveyed from the input device 40 as information on the collation result. Take out to device 10. If the conveyance control apparatus 10 has acquired collation result information from the operator of the heating furnace (steps S21 to S24), the slab (Sg) is charged in the heating furnace 7 after waiting for the extraction designation (step S25). .

  In the above secondary determination, the operator refers to the list display screen displayed on the display device 44, and if the slab number A and the slab number of the slab information B match each other, the operator has verified (passed). It is input as collation result information from the input device 40. Thereby, the conveyance control apparatus 10 deletes the display of the corresponding slab from the list screen. The operator can perform this collation operation on a plurality (for example, a maximum of 20) of temporary collation slabs (Sg, Sf, Se...).

  On the other hand, as a result of the operator referring to the list display screen displayed on the display device 44 in the secondary determination, the slab number A of the actual slab loaded through the primary determination and the slab information B stored in the transport control device 10 are stored. When the operator determines that a different material has been inserted because the slab numbers do not match each other, the operator inputs the different material information from the input device 40. As a result, a flag indicating that the corresponding slab is made of a different material (failed) is displayed on the list display screen of the display device 44. When the dissimilar material slab reaches the first (Sg) from the extraction door of the heating furnace 7, the transfer control device 10 notifies the operator of an instruction for baking out by an alarm (step S26). Thereafter, the slab is baked out (Sh).

  Thus, according to the slab collation method at the time of charging the heating furnace in this heating furnace facility, the slab corresponding to the image (actual slab number A) of the marking surface of the corresponding slab with respect to the actual slab that passed the primary determination. The information B is generated so that it can be displayed in an overlapping manner, and this is stored in the storage device 42 as an image associated with the charging time, and is sequentially inserted into the heating furnace 7 as a temporary verification slab (Sd). The operator refers to the image stored at the corresponding charging time for the plurality of temporary verification slabs (Sg, Sf, Se...) Sorted by the charging time by the display device 44, Since the slab number A of the actual slab and the slab information B are visually checked and the temporary matching slab (Sg, Sf, Se...) Is distributed in the furnace, the heating furnace operator can Slab (Sg Sf, matching work of Se · · ·) it can be collectively performed in the secondary judgment. Therefore, for example, the operator can secure a collective work time of 30 minutes or more. Therefore, it is possible to significantly reduce the work time of the furnace charging work compared to the conventional case, thereby making it possible to rationalize the charging operation, and the operator can perform other work in the idle time by this rationalization. it can.

  Further, in the marking reading method described in the above prior art, the reading rate depends on the marking display state, but since this determination is made visually by the operator, even if the marking display state is poor. The collation is possible, and even if the marking is made on the cut surface of the slab, it can be adopted as a slab collation method when charging the heating furnace without any problem.

  Moreover, according to the slab collation method at the time of charging the heating furnace of the transfer control device 10 described above, the collation result information is not input with the provisional collation from the extraction door (exit side) of the heating furnace 7 to the second (Sf). If there is a slab (Sf) (No in step S22), an alarm for a verification request is issued to the operator (step S23), so that the operator can be alerted for monitoring. Furthermore, after that, when the slab in which the collation result information is not input reaches the front row (Sg) of the heating furnace 7 and the slab (Sg) is specified for extraction (step S24), the collation result information is not yet input. Sometimes (No in step S24), even when the actual slab is ready for rolling, the heating furnace operator and the rolling operator are informed that the collation result information has not been entered. Since it has a lock function that issues an alarm and does not permit extraction to the hot rolling equipment because it has not been verified (step S26), extraction of different materials due to operator monitoring omission is prevented.

As described above, according to the slab collation method at the time of charging the heating furnace, it is possible to reliably collate the actual slab to be charged with the slab information corresponding to the actual slab and to rationalize the charging operation.
In addition, the slab collation method at the time of charging the heating furnace according to the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Slab yard 2 Discharge table 3 Weighing device 4 Loading table 5 Return table 6 Camera 7 Heating furnace 8 Extraction table 10 Conveyance control apparatus

Claims (6)

Used in heating furnace equipment equipped with a transfer control device that performs a process of charging an actual slab whose surface is labeled with a slab number associated with slab information whose weight can be calculated, and corresponding to the slab information A method of matching the actual slab
A primary determination step by processing of the transport control device, and a temporary verification slab information generation step of generating temporary verification slab information for secondary determination to be verified by an operator's visual inspection by processing by the transport control device,
The primary determination step determines whether or not the difference between the calculated weight calculated based on the slab information and the actually measured weight of the actual slab is within a predetermined allowable value, and only when it is within the predetermined allowable value. , Allowing charging of the actual slab into the heating furnace,
The provisional verification slab information generation step includes a slab number acquired by imaging an actual slab that is automatically inserted through the primary determination step and an installation on the actual slab so that an operator can verify the secondary determination. A slab collation method at the time of charging a heating furnace, characterized by generating temporary collation slab information stored so as to simultaneously display an image of the slab information linked at the time of entry. It further includes a temporary collation slab distribution step by the processing of the transfer control device, and the temporary collation slab distribution step is associated with the slab number of the actual slab charged into the heating furnace through the primary determination step and associated with it at the time of charging. If the information of the result of collation by the operator in the secondary determination is not input to the transport control device, even if the actual slab is ready for rolling, it is not collated. The slab verification method at the time of charging the heating furnace according to claim 1, wherein extraction to a hot rolling facility is not permitted. 3. The provisional collation slab distribution step is characterized in that an alarm is issued when a corresponding actual slab reaches a predetermined tracking position when the result information is not input to the transfer control device. The slab verification method at the time of charging furnace description.   A transport control device for performing a process of charging an actual slab, which is used in a heating furnace facility, and a slab number associated with slab information whose weight can be calculated is marked on the surface,
  At the time of charging the heating furnace, primary judgment means for executing processing for collating the slab information with the actual slab corresponding to the slab information, and temporary collation slab information for secondary judgment collated by visual observation by the operator are generated. Provisional verification slab information generating means,
  The primary determination means determines whether or not a difference between a calculated weight calculated based on the slab information and a weight obtained by actually measuring the actual slab is within a predetermined allowable value, and only when the difference is within the predetermined allowable value. , Allowing charging of the actual slab into the heating furnace,
  The temporary collation slab information generation means captures the actual slab automatically obtained through the processing of the primary determination means and the actual slab number so that the operator can collate in the secondary determination. A transport control device that generates temporary collation slab information stored so as to simultaneously display an image of slab information associated with a slab during charging.   Temporary verification slab distribution means is further provided. The temporary verification slab distribution means includes the slab number associated with the slab number of the actual slab charged into the heating furnace through the processing in the primary determination means and the slab associated with the slab. If the information obtained as a result of collation by the operator in the secondary determination is not input to the transport control device, it is determined that the actual slab is not collated even when the actual slab is ready for rolling. The conveyance control device according to claim 4, wherein extraction to a cold rolling facility is not permitted.   6. The provisional collation slab distribution means issues an alarm when the corresponding actual slab reaches a predetermined tracking position when the result information is not input to the transport control device. The conveyance control apparatus as described.

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