JP2023141189A - Slab charge control apparatus for continuous heating furnace, slab charge control method, and steel sheet production method - Google Patents

Abstract

To provide a slab charge control apparatus for a continuous heating furnace clarifying conveyance standards to a common conveyance device when a second slab with a high priority to be charged to a specified continuous heating furnace is waiting at a second conveyance device so as to charge the second slab with the high priority to the specified continuous heating furnace at a suitable timing, a slab charge control method, and a steel sheet production method.SOLUTION: A slab charge control apparatus 20 comprises a conveyance slab set part 21 calculating, when a second slab Sbn+1 to be charged to a specified (k) continuous heating furnace 2k is waiting at a second conveyance device 9, a second slab chargeable dimension Xk in the continuous heating furnace 2k by the following equation (1), comparing the calculated second slab chargeable dimension Xk and a dimension Wn+1k in a charge direction of the second slab Sbn+1k to be charged, and when a condition of Xk>Wn+1 k is satisfied, setting the second slab Sbn+1 to be charged as a next conveyance material. Xk=Ck-ΣA1 tonk-ΣW1 tonk...(1).SELECTED DRAWING: Figure 1

Description

The present invention relates to a slab charging control device for a continuous heating furnace, a slab charging control method, and a method for manufacturing steel plates.

In the slab heating process at a steelworks, slabs of various sizes and steel types are charged into a continuous heating furnace in order to be rolled in a rolling mill, and the slabs charged in the continuous heating furnace are transferred from a preheating zone to a heating zone. The slab is heated to a predetermined temperature, and the temperature distribution inside the slab is made uniform in the soaking zone. In such a slab heating process, consideration is given to heating the slab charged into the continuous heating furnace so that the temperature distribution of the slab is uniform. Furthermore, in order to charge the slabs into the continuous heating furnace in an orderly manner, various proposals have been made regarding methods for charging slabs and methods for determining the order of charging slabs in consideration of the order of extraction and rolling efficiency.

For example, in Patent Document 1, the conveyance path to the heating furnace is limited to one and has a plurality of rows that can be charged, and a plurality of slabs are sequentially conveyed on one conveyance path to form a plurality of rows that can be charged. A method of charging slabs for use in continuous heating furnaces has been proposed.
According to the slab charging method for a continuous heating furnace disclosed in Patent Document 1, the length of the heating furnace inside the furnace, the number of slabs in each row in the furnace, the dimension in the charging direction of the slabs in each row in the furnace, Based on the information on the distance between adjacent slabs in each row in the furnace, the next slab charging allowance dimension of each row in multiple charging possible rows is calculated, and the next slab charging calculated for each row The possible allowance size and the slab size to be charged are compared, and a row in which the size of the slab to be charged in the charging direction is smaller than the next slab charging allowance size is preset as a charging row candidate. Thereby, when automatically charging slabs into a continuous heating furnace, it is possible to prevent or suppress waiting for charging of slabs.

Japanese Patent Application Publication No. 2014-201802

However, the method for charging slabs in a continuous heating furnace disclosed in Patent Document 1 has the following problems.
That is, in the case of the slab charging method for a continuous heating furnace shown in Patent Document 1, the number of transport routes to the heating furnace is limited to one, but there are multiple transport routes to the heating furnace, and one of the transport routes is There is no description of a method for charging waiting slabs into a heating furnace preferentially over slabs waiting on other transport routes.

In other words, the first slab waiting in the first conveying device is conveyed by the conveying equipment to the common conveying device, and from this common conveying device, it is sequentially transferred to the continuous heating furnaces other than the specific continuous heating furnace among the plurality of continuous heating furnaces. At the same time, the second slab waiting in the second conveying device is preferentially conveyed to the common conveying device with respect to the first slab by the aforementioned conveying device, and from the common conveying device to a specific continuous heating furnace. In the case of preferential charging to a specific continuous heating furnace, when a high-priority second slab scheduled to be charged to a specific continuous heating furnace is waiting in the second conveyor, under what criteria is it transferred to the common conveyor by the conveyor? Patent Document 1 does not describe whether it is transported as the next transport material.
For this reason, in the slab charging method described in Patent Document 1, the second slab with a high priority cannot be charged into a specific continuous heating furnace at an appropriate timing, and the occurrence of empty furnaces due to waiting for charging increases. There was a problem with it being put away.

Therefore, the present invention has been made to solve this conventional problem, and its purpose is to transport the first slab waiting in the first transport device to the common transport device using the transport equipment, and to transfer the first slab waiting in the first transport device to the common transport device The conveying device sequentially charges the continuous heating furnaces other than the specific continuous heating furnace among the plurality of continuous heating furnaces, and the second slabs waiting in the second conveying device are transferred to the common conveyor as described above by the aforementioned conveying equipment. In the case where the first slab is preferentially transported to the device and is preferentially charged to a specific continuous heating furnace from the common transfer device, the second slab with a high priority scheduled to be charged to the specific continuous heating furnace. Continuous heating that makes it possible to clarify the standards for conveyance to the common conveyance device when the slab is waiting in the second conveyance device, and to charge the second slab with a high priority into a specific continuous heating furnace at an appropriate timing. An object of the present invention is to provide a furnace slab charging control device, a slab charging control method, and a steel plate manufacturing method.

In order to solve the above problems, a slab charging control device for a continuous heating furnace according to one aspect of the present invention transports a first slab waiting in a first transport device to a common transport device using a transport facility, and The common conveyance device sequentially charges continuous heating furnaces other than the specific (k) continuous heating furnace (1 to k-1, k+1 to N) among the plurality of continuous heating furnaces (1 to N), and A second slab waiting in a conveyance device is preferentially conveyed to the common conveyance device by the conveyance equipment over the first slab, and from the common conveyance device is preferentially conveyed to the continuous heating furnace of the specific (k). A slab charging control device for a continuous heating furnace in which the conveying equipment and the common conveying device form a common conveying path for the first slab and the second slab, the slab charging control device being located in the conveying path. n (n=1, 2, 3, ..., n), and n second slabs Sb _{1 to n} located on the transport path are The dimensions in the charging direction of the second slabs Sb _{1 to n} in the furnace when charged to the continuous heating furnace are W _{1 to n} k, and the n second slabs Sb located on the conveyance path are Ck is the air path distance in the furnace which is the air path distance that is already empty in the furnace when _{1 to n} are charged into the specific (k) continuous heating furnace; When the individual distances between adjacent second slabs Sb _{1 to n} in the furnace when the two slabs Sb _{1 to n} are loaded into the continuous heating furnace of the specific (k), A _{1 to n} k, When the second slab Sb _n+1 scheduled to be charged into the specific (k) continuous heating furnace is waiting in the second transport device, the second slab charging possible size in the specific (k) continuous heating furnace. Xk is calculated using the following formula (1), and the calculated second slab charging dimension Xk is calculated based on the charging direction of the second slab Sb _n+1 that is scheduled to be charged and is waiting in the second transport device. , and when the condition of Xk>W _{n+1 k} is satisfied, the second slab Sb _n+1, which is waiting in the second conveying device and is scheduled to be loaded, is set as the next conveyed material. The gist is that it is equipped with a slab setting section.
Xk=Ck-ΣA _1~n k-ΣW _1~n k...(1)

Further, in a slab charging control method for a continuous heating furnace according to another aspect of the present invention, a first slab waiting in a first conveying device is conveyed to a common conveying device by a conveying facility, and a plurality of slabs are transferred from the common conveying device to a common conveying device. It is sequentially charged into the continuous heating furnaces (1 to k-1, k+1 to N) other than the specific continuous heating furnace (k) among the continuous heating furnaces (1 to N), and is placed on standby in the second transfer device. Conveying a second slab with priority to the first slab by the conveying equipment to the common conveying device, and charging preferentially from the common conveying device to the specific continuous heating furnace (k), A slab charging control method for a continuous heating furnace in which the conveyance equipment and the common conveyance device form a common conveyance path for the first slab and the second slab, wherein the second slab is located on the conveyance path. n (n=1, 2, 3, ..., n), and n second slabs Sb _{1 to n} located on the conveyance path are loaded in the continuous heating furnace of the specific (k). The dimensions of each of the second slabs Sb _{1 to n} in the charging direction in the furnace when loaded are W _{1 to n} k, and the n second slabs Sb _{1 to n} located in the conveyance path are Ck is the air path distance in the furnace which is the air path distance that is already empty in the furnace when it is charged into the specific (k) continuous heating furnace, and n second slabs Sb _{1 to 1} are located on the conveyance path. When the individual distances between adjacent second slabs Sb _{1 to n} in the furnace when _n is charged into the continuous heating furnace of the specific (k) are A _{1 to n} k, the specific (k) When the second slab Sb _n+1 scheduled to be charged into the continuous heating furnace is waiting in the second conveyance device, the second slab charging possible dimension Xk in the continuous heating furnace of the specific (k) is determined by the above-mentioned ( 1) and the calculated second slab charging dimension Xk and the dimension W _n+1 k in the charging direction of the second slab Sb _n+1 that is scheduled to be charged and is waiting in the second transport device. The gist is that when the condition Xk>W _n+1 k is satisfied, the second slab Sb _n+1 , which is scheduled to be loaded and is waiting in the second transport device, is set as the next material to be transported.

Moreover, the gist of a method for manufacturing a steel plate according to another aspect of the present invention includes a slab charging control step using the above-described slab charging control method.

According to the continuous heating furnace slab charging control device, slab charging control method, and steel plate manufacturing method according to the present invention, the first slab waiting in the first conveying device is conveyed to the common conveying device by the conveying equipment. Then, the common conveying device sequentially charges the continuous heating furnaces other than the specific continuous heating furnace among the plurality of continuous heating furnaces, and the second slab waiting in the second conveying device is transferred by the aforementioned conveying equipment. In the case where the first slab is preferentially transferred to the above-mentioned common transfer device and is preferentially charged from the common transfer device to a specific continuous heating furnace, the priority of charging to the specific continuous heating furnace is determined. When high-priority second slabs are waiting in the second conveyance device, the standards for conveyance to the common conveyance device can be clarified, and the second slabs with high priority can be charged to a specific continuous heating furnace at the appropriate timing. It is possible to provide a slab charging control device for a continuous heating furnace, a slab charging control method, and a method for manufacturing steel sheets.

1 is a schematic diagram showing a planar arrangement of continuous heating furnace equipment equipped with a slab charging control device for a continuous heating furnace according to an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of a slab charging control device in the continuous heating furnace equipment shown in FIG. 1. FIG. 3 is a flowchart for explaining the flow of processing in the conveyance slab setting section of the slab loading control device shown in FIG. 2. FIG.

Embodiments of the present invention will be described below with reference to the drawings. The embodiments shown below illustrate devices and methods for embodying the technical idea of the present invention. It is not limited to the embodiments described below. Furthermore, the drawings are schematic. Therefore, it should be noted that the relationships, ratios, etc. between thickness and planar dimensions are different from those in reality, and the drawings also include portions where the relationships and ratios of dimensions differ.

FIG. 1 shows a planar arrangement of continuous heating furnace equipment equipped with a slab charging control device for a continuous heating furnace according to an embodiment of the present invention.
The continuous heating furnace equipment 1 shown in FIG. 1 includes a plurality (1 to N) of continuous heating furnaces 2 ₁ to 2 _N arranged in parallel. The numbers 1 to N that correspond to the code 2 in the continuous heating furnaces 2 ₁ to 2 _N correspond to the first to Nth continuous heating furnaces, respectively. In the example shown in FIG. 1, first continuous heating furnaces 2 ₁ to N=5th continuous heating furnaces 2 _N=5 are provided from left to right.

Each of the continuous heating furnaces 2 ₁ to 2 _N is equipped with a charging door 3 on the charging side and an extraction door 4 on the extraction side. In FIG. 1, the charging door 3 and the extraction door 4 are shown only in the N=5th continuous heating furnace ₂₅ .
On the charging side of each continuous heating furnace 2 ₁ to 2 _N , a first conveying device 6, a conveying facility 7, a common conveying device 8, and a second conveying device 9 are arranged. The first conveyance device 6 and the second conveyance device 9 are provided in parallel along the arrangement direction of the plurality of continuous heating furnaces 2 ₁ to 2 _N.

A plurality of first slabs Sa (in FIG. 1, the n+1th first slab Sa n+1=4 to the n+nth first slab Sa _n+1=4 to n+nth (up to San _n+n shown in the figure) is transferred. Then, the plurality of first slabs Sa waiting in the first conveyance device 6 are conveyed to the common conveyance device 8 by conveyance equipment 7 such as a slab lifter. The common conveyance device 8 extends across the continuous heating furnaces 2 ₁ to 2 _N on the charging side of each of the continuous heating furnaces 2 ₁ to 2 _N. The plurality of first slabs Sa transferred to the common transfer device 8 are transferred from the common transfer device 8 to a specific one (k: selected from among the plurality of continuous heating furnaces 2 ₁ to 2 N) of the plurality (1 to _N ) of continuous heating furnaces 2 1 to 2 N. Continuous heating furnaces ₂ (1 to 2 k-1, 2 k+1 to 2 N) other than continuous heating furnaces 2 ( ₁ to 2 k-1, 2 _k +1 to 2 N) (1 to 2 k-1, 2 _k+1 to 2 _{N )} ~2 _k+1 and 2 _k-1 ~2 ₁ are charged sequentially in this order. In the example shown in FIG. 1, the plurality of first slabs Sa conveyed to the common conveyance device 8 are selected from among the first to N=5th continuous heating furnaces 2 ₁ to 2 _N=5 from the common conveyance device 8. Continuous heating furnace 2 (k=3) continuous heating furnace 2 ₁ , 2 ₂ , 2 ₄ , _{2 5} other than _k=3 (1, 2, 4, 5), continuous heating furnace 2 ₅ , 2 ₄ , 2 ₂ , 2, _{and 1} are charged sequentially in this order.

In addition, a plurality of second slabs Sb (n+1, the n+1th second slab Sb _n+1 to be loaded is shown in FIG. 1) are transported from the material storage area 5 to the second conveyance device 9 by a crane (not shown). is passed on. The plurality of second slabs Sb waiting in the second transport device 9 are transported by the transport equipment 7 to the common transport device 8 with priority over the first slabs Sa. The plurality of second slabs Sb transported to the common transport device 8 are transferred from the common transport device 8 to a specific (k) continuous heating furnace 2 _k among the plurality ( _{1 to N) of continuous heating furnaces 2 1} to 2 _N. It is designed to be loaded with priority. In the example shown in FIG. 1, the plurality of second slabs Sb transported to the common transport device 8 are sequentially charged into a specific (k=3) continuous heating furnace ₂₃ .

The conveyance equipment 7 and the common conveyance device 8 form a common conveyance path for the first slab Sa and the second slab Sb.
In this embodiment, the first slab Sa is a general steel material, and the second slab Sb is a steel material whose heating conditions are different from those of the general steel material.
On the side opposite to the continuous heating furnaces 2 ₁ - 2 _N of the common conveyance device 8, slab charging equipment 12 ₁ - 12 _N is arranged at positions corresponding to the charging sides of the respective continuous heating furnaces 2 ₁ - 2 _N. ing. In the example shown in FIG. 1, slab charging equipment 12 ₁ to 12 _N=5 is arranged at a position corresponding to the charging side of the continuous heating furnaces 2 ₁ to 2 _N=5 . Each of the plurality of first slabs Sa and second slabs Sb transferred to the common conveyance device 8 on the charging side of each continuous heating furnace 2 ₁ - 2 _N is charged into the continuous heating furnace 2 ₁ - 2 N. The slabs are conveyed to the front of the charging door 3 of _{No. N} , are pushed out by the corresponding slab charging equipment 12 ₁ to 12 _N , and charged into the continuous heating furnaces 2 ₁ to 2 _N from the charging door 3 side. In the example shown in FIG. 1, each of the plurality of first slabs Sa and second slabs Sb transported to the common transport device 8 on the charging side of each of the continuous heating furnaces 2 ₁ to 2 _N=5 is charged. The continuous heating furnace 2 ₁ - 2 _N=5 is transported to the front of the charging door 3, and is pushed out by the corresponding slab charging equipment 12 ₁ - 12 _N=5 and charged into the continuous heating furnace 2 ₁ - 2 _N=5. It is charged from the entrance door 3 side.

Further, on the extraction side of each of the continuous heating furnaces 2 ₁ to 2 _N , an extraction side conveying device 10 that extends across the continuous heating furnaces 2 ₁ to 2 _N is installed. Each of the first slab Sa and the second slab Sb charged into each of the continuous heating furnaces 2 ₁ to 2 _N is extracted by an extraction device (not shown) after a predetermined heat treatment in each of the continuous heating furnaces 2 ₁ to 2 _N. The first slab Sa and the second slab Sb are each extracted from the door 4 and transported by the transport device 10 .

In FIG. 1, regarding the first slab Sa, the first slab Sa ₁ to n=3rd first slab Sa _n= In the _first conveying device 6, n+1=4th first slab Sa _n+1=4 , n+2=5th first slab Sa _n+2=5 , n+3=6 The first slab Sa _n+3=6 , the first slab _n+4=7 , and the first slab Sa _n+n are shown as examples.

Further, in FIG. 1, regarding the second slab Sb, n pieces of the second slab Sb are conveyed on the common conveyance path of the first slab Sa and the second slab Sb, and the second slab Sb, which is the first from the head, Slabs Sb ₁ to n-th second slabs Sb _n are illustrated, and the n+1-th second slab Sb _n+1 to be loaded in the second conveyance device 9 is illustrated.
In addition, in FIG. 1, the second and third first slabs Sa ₂ and Sa ₃ from the top are short two-row materials that are charged into the fourth continuous heating furnace ₂₄ at the same time. Moreover, on the charging side of the first continuous heating furnace 2 ₁ , instead of the short furnace length of the continuous heating furnace 2 ₁ , the first slab Sa or the second slab Sb (in the case of this embodiment, the second slab Sb is 3 A sub-skid 11 is provided on which a material (not applicable since it is charged into the second continuous heating furnace ₂₃ ) can be temporarily placed therein.

In the continuous heating furnace equipment 1 configured as described above, the first slab Sa waiting in the first conveying device 6 is conveyed to the common conveying device 8 by the conveying device 7, and from the common conveying device 8 a plurality of slabs (1 to N ) continuous heating furnaces 2 ₁ to 2 _N Continuous heating furnaces 2 of specific (k) continuous heating furnaces 2 of (1 to k-1, k+1 to N) other than _k ( ₁ to k-1, k+1 to N) 1 to 2 _k-1 , 2 _k+1 to 2N to _2N in the order of continuous heating furnaces _2N to _2k+1 and _2k-1 to ₂₁ , and the second slab Sb waiting in the second transfer device 9 is transferred by the transfer equipment 7. The first slab Sa is preferentially transferred to the common transfer device 8, and is preferentially charged from the common transfer device 8 to a specific (k) continuous heating furnace _2k .

In the example shown in FIG. 1, the specific (k) continuous heating furnace _2k into which the second slab Sb is charged is a continuous heating furnace ₂₃ with k=3.
The second slab Sb waiting in the second conveying device 9 is conveyed by the conveying equipment 7 to the common conveying device 8 with priority over the first slab Sa, and from the common conveying device 8 to a specific (k) continuous heating furnace. 2 _k , n second slabs Sb are present in the conveying equipment 7 and the common conveying device 8 that form a common conveying route (in the example shown in FIG. n second slabs Sb _{1 to n} exist and three first slabs Sa _{1 to 3 exist} in Common conveyance of the second slab Sb _n+ 1 with a high priority to be charged when the second slab Sb n+1 (n+1th second slab Sb _{n+1 )} is waiting in the second conveyance device 9 If the transport standards to the device 8 are not clear, the second slab Sb with a high priority cannot be charged to the specific (k) continuous heating furnace _2k at an appropriate timing, resulting in an empty furnace due to waiting for charging. may increase.

Therefore, in the continuous heating furnace equipment 1, the second slab Sb _{n+1 (} n+1 Clarify the criteria for transporting the second slab Sb _n+1 , which has a high priority and is scheduled to be loaded, to the common transport device 8 when the second slab Sb _n+1) is waiting in the second transport device 9. In order to do so, a slab charging control device 20 is provided.

As shown in FIG. 2, the slab charging control device 20 for a continuous heating furnace according to an embodiment of the present invention is configured to handle a first slab Sa _n+1 and a second slab waiting on the first conveying device 6 to be charged. A conveyance slab setting unit 21 that sets any of the high priority second slabs Sb _n+1 scheduled to be loaded that are waiting on the conveyance device 9 as the next conveyed material, and a first slab Sa and a second slab. The main controller 22 controls a series of transport, charging, and extraction of Sb.
The slab loading control device 20 is a computer system having an arithmetic processing function, and implements each function of the conveying slab setting section 21 and the main control section 22 on software according to commands of a program stored in a storage section.

The main control unit 22 controls the operation of the continuous heating furnaces 2 ₁ to 2 _N (N=5 in the example shown in FIG. 1) and the transport mechanisms (first transport device 6, 2. The first slab Sa and the second slab Sb on the common conveyance path (the conveyance facility 7 and the common conveyance device 8) when the conveyance device 9, the conveyance facility 7, the common conveyance device 8, and the conveyance device 10) are operated. The position of the first slab Sa and the second slab Sb in each continuous heating furnace 2 ₁ to 2 _N is constantly tracked, and the tracking information of the first slab Sa and the second slab Sb is used as the transport slab setting. The information is sent to the department 21.

The conveyance slab setting section 21 is connected to the host computer 23 , standby detection means 24 , charging detection means 25 , and extraction detection means 26 .
The host computer 23 stores the individual dimensions of the first slab Sa in the charging direction, the individual dimensions of the second slab Sb in the charging direction, the furnace lengths of the plurality of continuous heating furnaces 2 ₁ to 2 _N , and the second slab Sb. Continuous heating furnace 2k of a specific (k, k=3 in the example shown in FIG. 1) to be charged, continuous heating furnace _2k of specific ( _k ) to which the first slab Sa is charged (1 to k- 1, k+1 to N) continuous heating furnaces 2 ₁ to 2 _k-1 , 2 _k+1 to 2 _N , adjacent second slabs Sb when charged into a specific (k) continuous heating furnace 2 _k Information on the spacing between the slabs Sb and the spacing between adjacent first slabs Sa when the first slab Sa is charged into the continuous heating furnaces 2 ₁ to 2 _k-1 and 2 _k+1 to 2 _N is set as the conveying slab. The information is sent to the department 21.

The standby detection means 24 is comprised of load meters installed in each of the first transport device 6 and the second transport device 9. The standby detection means 24 installed in the first conveyance device 6 detects the load of the first slab Sa while the first slab Sa is waiting on the first conveyance device 6, so that the first slab Sa is It detects that it is waiting on the first conveying device 6 and sends a detection signal to the conveying slab setting section 21 and the main control section 22. Further, the standby detection means 24 installed in the second conveyance device 9 detects the load of the second slab Sb while the second slab Sb is waiting on the second conveyance device 9, thereby detecting the load on the second slab Sb. It is detected that Sb is waiting on the second conveyance device 9, and the detection signal is sent to the conveyance slab setting section 21.
Further, the charging detection means 25 is connected to the slab charging equipment 12 ₁ to 12 _N arranged at a position corresponding to the charging side of each continuous heating furnace 2 ₁ to 2 _N (N=5 in the example shown in FIG. 1). is installed in each of the slab charging equipment 12 ₁ to 12 _N to detect the operation of each slab charging equipment 12 1 to 12 N.

Further, the extraction detection means 26 is installed in each of the extraction devices (not shown) arranged at a position corresponding to the extraction door 4 of each continuous heating furnace 2 ₁ to 2 _N , and detects the operation of each extraction device. .
Then, the conveyance slab setting section 21 performs steps S1 to S1 shown in FIG. By executing each process of step S10, the n+1th first slab Sa n+1 waiting on the first conveying device 6 to be charged and the first slab Sa _n+1 waiting on the second conveying device 9 to be charged are One of the n+1-th second slabs Sb _n+1 having a high priority is set as the next conveyed material. Each process of step S1 to step S10 of the conveyance slab setting section 21 corresponds to the slab charging control method for a continuous heating furnace according to an embodiment of the present invention.

First, in step S1, the transport slab setting unit 21 determines whether a second slab Sb _n+1 with a high priority to be loaded is waiting on the second transport device 9.
In other words, the conveyance slab setting unit 21 determines whether the standby detection means 24 has detected that the n+1-th second slab Sb _n+1 to be loaded is waiting on the second conveyance device 9. do.
If the determination result is YES, the process moves to step S2, and if the determination result is NO, the process moves to step S9.

In step S2, the transfer slab setting unit 21 sends information about the specific (k) continuous heating furnace 2 _k into which the n+1-th second slab Sb _n+1 scheduled to be charged is to be charged, and the information about the continuous heating furnace 2 k that is waiting in the second transfer device 9. information on the dimension W _n+1 k in the charging direction of the second slab Sb _n+1 scheduled to be charged, and the n second slabs Sb Information on the in-furnace air path distance Ck, which is the empty air path distance in the furnace when the slabs Sb _{1 to Sb n} are charged into the specific (k) continuous heating furnace 2 _k , is acquired.

Specifically, the conveyance slab setting unit 21 obtains information about the specific (k) continuous heating furnace 2 _k into which the n+1-th second slab Sb _n+1 to be charged is to be charged from the host computer 23. do. In the example shown in FIG. 1, the conveyance slab setting unit 21 acquires information about the continuous heating furnace ₂₃ into which the (n+1)th second slab Sb _n+1 to be charged is to be charged.
Further, the conveyance slab setting unit 21 acquires from the host computer 23 information on the dimension W _n+1 k in the charging direction of the n+1-th second slab Sb _n+1 that is waiting in the second conveyance device 9 and is scheduled to be loaded. . In the example shown in FIG. 1, the transport slab setting unit 21 acquires information on the dimension W _n+1 3 in the charging direction of the n+1-th second slab Sb _n+1 that is scheduled to be charged and is waiting in the second transport device 9. do.

Further, the conveyance slab setting unit 21 receives tracking information of the first slab Sa and the second slab Sb from the main control unit 22, the individual dimensions in the charging direction of the second slab Sb from the host computer 23, and the plurality of continuous heating The inner length of the furnace 2 ₁ to 2 _N , the specific (k) continuous heating furnace 2 _k into which the second slab Sb is charged, and the adjacency when the second slab Sb is charged into the continuous heating furnace 2 _k Based on the information on the spacing between the second slabs Sb, n second slabs Sb _{1 to n} located on the common conveyance route (conveyance equipment 7 and common conveyance device 8) are identified as a series of (k) The in-furnace air path distance Ck, which is the empty air path distance in the furnace when the heating furnace 2 _k is loaded, is calculated, and the calculation result is obtained.

In the example shown in FIG. 1, the conveyance slab setting unit 21 calculates the in-furnace air path distance C3 based on information from the main control unit 22 and the host computer 23, and obtains the calculation result.
Next, in step S3, the transport slab setting unit 21 determines based on information from the host computer 23 whether the n+1-th second slab Sb _n+1 to be loaded is the second material of the short two-row material.
If the determination result is YES, the process moves to step S8, and if the determination result is NO, the process moves to step S4.

In the example shown in FIG. 1, the n+1-th second slab Sb _n+1 to be charged is not the second material of the short two-row material, so the process moves to step S4.
Next, in step S4, the conveyance slab setting unit 21 selects the n+1st second slab Sb _n+1 to be charged into the first continuous heating furnace ₂₁ , and the first slab Sb n+1 to be charged into the subskid 11. It is determined whether Sa or the second slab Sb is present.
If the determination result is YES, the process moves to step S9, and if the determination result is NO, the process moves to step S5.

In the example shown in FIG. 1, the (n+1)th second slab Sb _n+1 to be charged is to be charged into the k=3rd continuous heating furnace 2 _(k=3) , so the process moves to step S5.
Next, in step S5, n (n=1, 2, 3, . . . , n) second slabs Sb _{1 to n} located on the common conveyance path are transferred to a specific (k) continuous heating furnace 2. The dimensions W _{1 to n of each of the second slabs Sb 1} to n in the charging direction when the second slabs Sb 1 to _n are charged in the furnace k, and the n second slabs Sb ₁ located on a common transport path _-n is loaded into a specific (k) continuous heating furnace 2 _k , information on the individual distances A _{1 to n} k between adjacent second slabs Sb _{1 to n} in the furnace is obtained.

Specifically, the conveyance slab setting unit 21 receives tracking information of the first slab Sa and second slab Sb from the main control unit 22, and the individual dimensions in the charging direction of the second slab Sb from the host computer 23, Information on the specific (k) continuous heating furnace _2k into which the second slab Sb is charged and the interval between adjacent second slabs Sb when the second slab Sb is charged into the continuous heating furnace _2k . Based on this, when n second slabs Sb _{1 to n} located on a common conveyance path (conveyance equipment 7 and common conveyance device 8) are charged into a specific (k) continuous heating furnace _2k , The individual dimensions W 1 _{to n} of the second slabs Sb 1 _to n in the furnace in the charging direction k and the n second slabs Sb _{1 to n} located on the common conveyance path are a specific (k) series The individual distances A _{1 to n} k between the adjacent second slabs Sb _{1 to n} in the furnace when loaded into the heating furnace 2 _k are calculated, and the calculation results are obtained.

In the example shown in FIG. 1, the conveyance slab setting unit 21 determines the n slabs located on the common conveyance route (the conveyance equipment 7 and the common conveyance device 8) based on information from the main control unit 22 and the host computer 23. When the second slabs Sb _1-n are charged into the continuous heating furnace _23, the dimensions W _1-n 3 of the second slabs Sb _1-n in the individual charging direction in the furnace and the common conveyance path The individual distances A 1 to n 3 between adjacent second slabs Sb _{1 to n} in the furnace when the n second slabs Sb _{1 to n} located in the furnace are charged into the continuous heating furnace _{2 3 are} Perform a calculation and obtain the calculation result.

Next, in step S6, the transport slab setting unit 21 uses the information on the in-furnace air path distance Ck obtained in step S3 and the dimensions W _{1 to n in the charging direction of the second slabs Sb 1 to n} obtained in step S5. Based on the information on k and the information on the individual distances A _{1 to n} k between the second slabs Sb _{1 to n} obtained in step S5, it is possible to charge the second slab in the specific (k) continuous heating furnace 2 _k . The dimension Xk is calculated using the following equation (1).
Xk=Ck-ΣA _1~n k-ΣW _1~n k...(1)

In the example shown in FIG. 1, the conveyance slab setting unit 21 calculates the second slab insertable dimension X3 in the continuous heating furnace ₂₃ using the following formula.
X3=C3-ΣA _1~n 3-ΣW _1~n 3
Next, in step S7, the conveyance slab setting unit 21 calculates the second slab loading dimension Xk calculated in step S6 and the n+1th slab to be loaded waiting in the second conveyance device 9 acquired in step S2. The dimension W _n+1 k of the second slab Sb _n+1 in the charging direction is compared to determine whether or not Xk>W _n+1 k holds true.

In the example shown in FIG. 1, the conveying slab setting unit 21 calculates the second slab charging possible dimension The dimension W n+1 3 of the second slab Sb _n+1 in the charging direction is compared with the dimension W _n+1 3 of the second slab Sb n+1, and it is determined whether or not X3>W _n+1 3 holds true.
If the determination result is YES, the process moves to step S8, and if the determination result is NO, the process moves to step S9.

In the example shown in FIG. 1, X3 is smaller than W _n+1 3, and the determination result in step S7 is NO, and the process moves to step S9.
In step S8, the conveyance slab setting unit 21 sets the n+1-th second slab Sb _n+1 , which is waiting on the second conveyance device 9 and is scheduled to be loaded and has a high priority, as the next conveyed material, and The setting process ends.
On the other hand, in step S9, the transport slab setting unit 21 determines whether or not the (n+1)th first slab San ₊₁ scheduled to be loaded is waiting on the first transport device 6.
If the determination result is YES, the process moves to step S10, and if the determination result is NO, the process in step S9 is repeated.

In the example shown in FIG. 1, the conveyance slab setting unit 21 determines whether the n+1=4th first slab Sa _n+1=4 scheduled to be loaded is waiting on the first conveyance device 6, Since the n+1=4th first slab San _n+1=4 to be loaded is waiting on the first conveying device 6, the process moves to step S10.
In step S10, the conveyance slab setting unit 21 sets the n+1-th first slab Sa _n+1 , which is scheduled to be loaded and is waiting on the first conveyance device 6, as the next conveyed material, and the conveyance slab setting process ends. do.

In the case of the example shown in FIG. 1, the conveyance slab setting unit 21 selects the n+1th=4th first slab Sa _{n+1=4, which} is scheduled to be loaded and is waiting on the first conveyance device 6, as the next conveyed material. Set.
When the conveyance slab setting process by the conveyance slab setting section 21 is completed, the main control section 22 controls the drive of the conveyance equipment 2, and waits on the second conveyance device 9 set as the next conveyance material. The n+1-th second slab Sb _n+1 scheduled to be charged or the n+1-th first slab Sa _n+1 scheduled to be charged that is waiting on the first transport device 6 is transported onto the common transport device 8. , and subsequently controls a series of conveyance, charging, and extraction of the first slab Sa and the second slab Sb.
When manufacturing steel plates, the first slab Sa and the second slab Sb are transferred to the continuous heating furnace 2 ₁ through a slab charging control process using the continuous heating furnace slab charging control method according to an embodiment of the present invention. After being heated and extracted in ~ _2N , a steel plate is manufactured through various processes such as a rough rolling process.

In this way, according to the slab charging control device 20 according to the present embodiment, the second slab Sb _n+1 scheduled to be charged into the specific (k) continuous heating furnace 2 _k is waiting in the second conveying device 9. At times, the second slab chargeable dimension Xk in the specific (k) continuous heating furnace _2k is calculated using the above-mentioned formula (1), and the second slab chargeable dimension Xk calculated and the second conveyance device 9 and the dimension W _n+1 k in the charging direction of the second slab Sb _{n+1 that} is scheduled to be charged, and when the condition of The conveyance slab setting unit 21 is provided for setting the second slab Sb _n+1 to be loaded as the next conveyance material.

Further, according to the slab charging control method according to the present embodiment, in steps S1 to S10, the second slab Sb _n+1 scheduled to be charged into the specific (k) continuous heating furnace _2k is transferred to the second conveying device 9. While waiting, calculate the second slab chargeable dimension Xk in the specific (k) continuous heating furnace 2 _k using the above-mentioned formula (1), and calculate the second slab chargeable dimension Xk with the calculated second slab chargeable dimension Xk. Comparing the dimension W _{n+1 k in the charging direction of the second slab Sb n+1} scheduled to be charged, which is waiting in the second transport device 9, when the condition of Xk>W n _{+ 1} k is satisfied, the second slab Sb n+1 is The second slab Sb _n+1 , which is waiting in the device 9 and is scheduled to be loaded, is set as the next material to be conveyed.

As a result, the first slab waiting in the first conveying device is conveyed by the conveying equipment to the common conveying device, and from this common conveying device to the continuous heating furnace other than the specific continuous heating furnace among the plurality of continuous heating furnaces. At the same time, the second slabs waiting in the second conveying device are conveyed preferentially to the first slab by the aforementioned common conveying device by the aforementioned conveying device, and the common conveying device performs specific continuous heating. In the case of preferential charging to a furnace, the standards for transporting to the common transport device when a high-priority second slab scheduled to be charged to a specific continuous heating furnace is waiting in the second transport device have been clarified. Accordingly, the second slab having a high priority can be loaded into a specific continuous heating furnace at an appropriate timing.
Thereby, it is possible to avoid an increase in the occurrence of empty furnaces due to waiting for charging.

Although the embodiments of the present invention have been described above, the present invention is not limited thereto, and various changes and improvements can be made.
For example, although the first slab Sa is described as a general steel material and the second slab Sb is a steel material whose heating conditions are different from that of the general steel material, the first slab Sa may be made of a material other than the general steel material. , the second slab Sb may be made of a steel other than steel whose heating conditions are different from those of general steel. Further, the first slab Sa and the second slab Sb may be of the same type or different types.

Further, although the number of continuous heating furnaces is five (N=5), it is not limited to this number.
In addition, although the specific (k) continuous heating furnace _2k into which the second slab Sb is charged is explained by exemplifying the case where k=3, it is selected from among the continuous heating furnaces 1 to N. It is sufficient if the continuous heating furnace 2 is of a specific ( _k ) type, and is not limited to the case where k=3.
Furthermore, by adopting a steel plate manufacturing method including a slab charging control process using the slab charging control method according to an embodiment of the present invention, the heating efficiency of the continuous heating furnaces 2 ₁ to 2 _N can be increased. was able to improve productivity.

1 Continuous heating furnace equipment 2 ₁ - 2 _N continuous heating furnace 2 _K specific continuous heating furnace 3 Charging door 4 Extraction door 5 Material storage area 6 First conveyance device 7 Conveyance equipment (common conveyance route)
8 Common transport device (common transport route)
9 Second conveying device 10 Conveying device 11 Subskid 12 ₁ to 12 _N slab charging equipment 20 Slab charging control device for continuous heating furnace 21 Conveying slab setting section 22 Main control section 23 Host computer 24 Standby detection means 25 Charge detection Means 26 Extraction detection means Sa first slab Sb second slab

Claims (4)

The first slab waiting in the first conveying device is conveyed to the common conveying device by the conveying equipment, and from the common conveying device one of the plurality (1 to N) continuous heating furnaces (k: among the 1 to N) is transferred. The continuous heating furnaces (1 to k-1, k+1 to N) other than the continuous heating furnaces (specific numbers selected from The conveying equipment and the common conveying device, wherein the first slab is preferentially conveyed to the common conveying device by the facility, and the first slab is preferentially charged from the common conveying device to the continuous heating furnace of the specific (k). is a slab charging control device for a continuous heating furnace that forms a common conveyance path for the first slab and the second slab,
The number of second slabs located on the common transport route is n (n=1, 2, 3, ..., n), and n second slabs Sb are located on the common transport route. When the second slabs Sb _{1 to n} are charged into the continuous heating furnace of the specific (k), the dimensions in the charging direction of each of the second slabs Sb _{1 to n are} W _{1 to n} k, and the common conveyance path is When the n second slabs Sb _{1 to Sb} located at are charged into the continuous heating furnace of the specific (k), the in-furnace air path distance that is already empty in the furnace is Ck, Between adjacent second slabs Sb _{1 to n} in the furnace when n second slabs Sb _{1 to n} located on the common conveyance path are charged into the continuous heating furnace of the specific (k) When the individual distances are A _{1 to n} k,
When the second slab Sb _n+1 scheduled to be charged into the specific (k) continuous heating furnace is waiting in the second conveying device,
The second slab chargeable dimension Xk in the continuous heating furnace of the specific (k) is calculated using the following formula (1), and the second slab chargeable dimension Xk and the calculated second slab chargeable dimension Xk are The dimension W n+1 k in the charging direction of the second slab Sb _n+1 scheduled to be charged is compared with the dimension W _n+1 k of the second slab Sb _n+1 scheduled to be charged, and when the condition of A slab charging control device for a continuous heating furnace, comprising a conveying slab setting section that sets a second slab Sb _n+1 to be charged as the next conveyed material.
Xk=Ck-ΣA _1~n k-ΣW _1~n k...(1) 2. The slab charging control device for a continuous heating furnace according to claim 1, wherein the first slab is a general steel material, and the second slab is a steel material whose heating conditions are different from those of the general steel material. The first slab waiting in the first conveying device is conveyed to the common conveying device by the conveying equipment, and from the common conveying device one of the plurality (1 to N) continuous heating furnaces (k: among the 1 to N) is transferred. The continuous heating furnaces (1 to k-1, k+1 to N) other than the continuous heating furnaces (specific numbers selected from The conveying equipment and the common conveying device, wherein the first slab is preferentially conveyed to the common conveying device by the facility, and the first slab is preferentially charged from the common conveying device to the continuous heating furnace of the specific (k). is a slab charging control method for a continuous heating furnace that forms a common conveyance path for the first slab and the second slab,
The number of second slabs located on the common transport route is n (n=1, 2, 3, ..., n), and n second slabs Sb are located on the common transport route. When the second slabs Sb _{1 to n} are charged into the continuous heating furnace of the specific (k), the dimensions in the charging direction of each of the second slabs Sb _{1 to n are} W _{1 to n} k, and the common conveyance path is When the n second slabs Sb _{1 to Sb} located at are charged into the continuous heating furnace of the specific (k), the in-furnace air path distance that is already empty in the furnace is Ck, Between adjacent second slabs Sb _{1 to n} in the furnace when n second slabs Sb _{1 to n} located on the common conveyance path are charged into the continuous heating furnace of the specific (k) When the individual distances are A _{1 to n} k,
When the second slab Sb _n+1 scheduled to be charged into the specific (k) continuous heating furnace is waiting in the second conveying device,
The second slab chargeable dimension Xk in the continuous heating furnace of the specific (k) is calculated using the following formula (1), and the second slab chargeable dimension Xk and the calculated second slab chargeable dimension Xk are The dimension W n+1 k in the charging direction of the second slab Sb _n+1 scheduled to be charged is compared with the dimension W _n+1 k of the second slab Sb _n+1 scheduled to be charged, and when the condition of A slab charging control method for a continuous heating furnace, characterized in that the second slab Sb _n+1 to be charged is set as the next conveyed material.
Xk=Ck-ΣA _1~n k-ΣW _1~n k...(1) A method for manufacturing a steel plate, comprising a slab charging control step using the slab charging control method according to claim 3.

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