A slab length optimization method and system based on order requirements

Abstract

The technical scheme adopted by the present application is: a slab length optimization method and system based on order requirements, the method comprising the following steps: determining the upper and lower limits of coil weight, the maximum and minimum values of slab width process, slab density, slab thickness and comprehensive yield according to order requirements; determining the slab width of casting plan according to order requirements; calculating the corresponding coil number based on the initial slab weight calculated based on the maximum slab length and the slab width of the casting plan; determining the calculation method of slab weight according to the calculation result of the coil number and calculating the final slab weight; calculating the slab length of the casting plan according to the final slab weight. The present application can directly calculate the optimal slab size meeting the process regulations and order requirements, and through integration with a steelmaking plan module, the automatic generation and issuance of the slab size can be realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of steel manufacturing, and particularly relates to a slab length optimization method and system based on order requirements. BACKGROUND

[0002] With the increasingly fierce competition in the steel market, the customer order personalization requirements are also becoming more and more complex. One of the requirements is that the finished product coil weight personalization is more complex. Moreover, due to the large difference in the product coil weight range of hot-rolled and cold-rolled products produced by the plate, if the slab length is not set reasonably during the production of the steelmaking group, the final product will not be able to fall within the range required by the customer during the coil splitting, especially if the previous process has special process requirements for the slab length and width, the problem will become more complex, and manual calculation cannot meet the production optimization requirements. Therefore, it is necessary to automatically realize it in the information system through a program algorithm.

[0003] The existing patent 1 "Process design method for plate rolling" (application number: 202010202960.1) calculates the slab target length range according to the process setting, sets the slab target length as the maximum target length, and calculates the finished product coil target number accordingly.

[0004] The existing patent 22 "Material design optimization method and system for maximizing the production capacity of hot-rolled strip steel", (application publication number: CN 115608776 A), according to the order requirements, the target width and thickness of the steel coil are calculated, and then the slab width and thickness are calculated according to the process regulations. According to the process setting, a plurality of available slab types are obtained, and then through multiple comparisons, the available slab type that meets the contract conditions is selected, wherein the maximum length of the slab is determined according to the hot coil weight, the optimal width and the optimal thickness of the slab.

[0005] The methods of the above two existing patents are completed after the calculation in the order design stage and are delivered to production, but during the production of the steelmaking group, due to the complexity of a large number of contracts and the batch requirements of the steelmaking group, the slab width corresponding to different batches of the same contract can be different, which leads to different slab lengths. The calculation results in the order design stage are not strong in guiding production. SUMMARY

[0006] The purpose of the present application is to solve the problems in the background art, and to provide a slab length optimization method and system based on order requirements, which can directly calculate the optimal slab size that meets the process regulations and order requirements, and can realize the automatic generation and issuance of the slab size by integrating with the steelmaking plan module.

[0007] The technical solution adopted by the present application is: a slab length optimization method based on order requirements, comprising the following steps:

[0008] determining the upper and lower limits of the coil weight, the maximum and minimum values of the slab width, the slab density, the slab thickness and the overall yield rate according to the order requirements;

[0009] determining the slab width of the casting plan according to the order requirements;

[0010] calculating the upper and lower limits of the coil weight and the corresponding number of sub-coils based on the initial slab weight calculated based on the maximum slab length and the slab width of the casting plan;

[0011] determining the calculation method of the slab weight according to the calculation result of the number of sub-coils and calculating the final slab weight;

[0012] calculating the slab length of the casting plan according to the final slab weight.

[0013] The above technical solution further includes the following steps:

[0014] calculating the upper and lower limits of the coil weight and the corresponding number of sub-coils based on the actual process raw material weight of each process, and determining whether the actual process raw material weight meets the preset coil weight requirement according to the calculation result of the number of sub-coils.

[0015] The above technical solution further includes the following steps:

[0016] determining the maximum and minimum values of the slab length according to the order requirements, and determining whether the calculated slab length of the casting plan meets the maximum and minimum values of the slab length; if yes, the casting plan is released; otherwise, an error is reported.

[0017] In the above technical solution, the process of determining the maximum and minimum values of the slab width, the slab density, the maximum and minimum values of the slab length, the slab thickness and the overall yield rate according to the order requirements includes:

[0018] completing the process design according to the finished product information of the order requirements, and then calculating the corresponding slab width, thickness, slab length and length minimum value, slab density, slab thickness and overall yield rate by considering the capacity of the side press, heating furnace and hot rolling mill.

[0019] In the above technical solution, the process of determining the slab width of the casting plan according to the order requirements includes: setting the orders with the slab width range in the overlapping interval in the same casting according to the order requirements, and the slab width of the casting must be between the maximum and minimum slab width of each order in the casting plan.

[0020] In the above technical solution, the initial slab weight W0 is calculated by the following formula:

[0021] W0 = Width_set * L_max * H * p

[0022] Wherein, Width_set represents the slab width of the casting plan, L_max represents the maximum value of the slab length; p represents the slab density, and H represents the slab thickness.

[0023] In the technical solution, the following formula is used to calculate the number of coils N corresponding to the upper limit of the coil weight based on the initial slab weight, and the number of coils n corresponding to the lower limit of the coil weight based on the initial slab weight;

[0024] N = roundup (W0 * C / Wt_order_max);

[0025] n = rounddown (W0 * C / Wt_order_min);

[0026] Wherein, Wt_order_max represents the upper limit of the coil weight, Wt_order_min represents the lower limit of the coil weight; C represents the comprehensive yield; roundup() represents the result rounding up; rounddown() represents the result rounding down.

[0027] In the technical solution, the process of determining the calculation method of the slab weight according to the calculation result of the number of coils and calculating the final slab weight includes:

[0028] If N <= n, the following formula is used to calculate the final slab weight We = Width_set * L_max * H * p;

[0029] Otherwise, the following formula is used to calculate the final slab weight:

[0030] We = n * Wt_order_min / C.

[0031] In the technical solution, the following formula is used to calculate the slab length L of the casting plan:

[0032] L = We / (Width_set * H * p).

[0033] In the technical solution, the following formula is used to calculate the number of coils N' corresponding to the upper limit of the coil weight according to the actual process material weight of each process:

[0034] N' = roundup (Wm * C / Wt_order_max)

[0035] The following formula is used to calculate the number of coils n' corresponding to the lower limit of the coil weight according to the actual process material weight of each process:

[0036] n' = rounddown (Wm * C / Wt_order_min)

[0037] wherein, Wm represents actual process raw material weight, C represents yield; Wt_order_max represents coil weight upper limit, Wt_order_min represents order coil weight lower limit; roundup() represents result rounding up; rounddown() represents result rounding down;

[0038] If n < N, it is determined that the actual process raw material weight does not reach the preset coil weight requirement; otherwise, it is determined that the actual process raw material weight reaches the preset coil weight requirement.

[0039] The application also provides a slab length optimization system based on order requirements, which is used for the slab length optimization method based on order requirements.

[0040] The application also provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the slab length optimization method based on order requirements.

[0041] The application provides an electronic device, which comprises a memory and a processor, the memory and the processor are connected with each other in communication, the memory stores computer instructions, and the processor executes the computer instructions to realize the slab length optimization method based on order requirements.

[0042] The application has the following beneficial effects: the application provides a method for calculating the optimal size of a slab, which can directly calculate the optimal slab size meeting the process regulations and order requirements, under the conditions of meeting the process limitations and maximizing the production capacity constraints, considering the customer order finished product coil weight requirement range, and calculating the optimal length of the billet meeting the order finished product coil weight. The application can realize the automatic generation and issuance of the slab size by combining with the issuance of the steelmaking plan. The application also deploys the optimal calculation method of the slab length in the execution of the preparation of the steelmaking plan, and improves the guidance of the calculation result to the production.

[0043] Further, the application proposes to check the consistency of the raw material weight and the order requirements in the subsequent processes, to ensure that the final machine group coil can meet the coil weight range of the contract, improve the material utilization efficiency, ensure that the coil weight required by the customer order can be met, and avoid the generation of excess material due to the inconsistency of the coil weight.

[0044] Further, the application is suitable for the determination of the consistency of the raw material weight and the order requirements in the subsequent processes, and when the edge cutting, head and tail cutting or contract switching operations occur in the production, it can be determined whether the raw material weight can meet the finished product coil weight range required by the contract after the finished product machine group coil.

[0045] Further, the present application designs process based on order requirements, and considers equipment attributes to obtain parameters required for subsequent calculation of slab length, fully considers actual production environment and scene, ensures calculation accuracy, and further improves production efficiency.

[0046] Further, the present application selects appropriate multiple orders to compile casting plan, which can effectively improve production efficiency, so that steel grades are allowed to be produced in the same casting, the slab width of the casting plan is set through the order overlap interval to cover the requirements of different orders, the production efficiency is improved as much as possible under the premise of meeting the order requirements, and production cost is saved.

[0047] Further, the initial slab weight and the corresponding calculation method of the number of rolls provided by the present application fully reflect the production plan requirements and actual production scene, and provide strong data support and basis for subsequent calculation parameter adjustment, so that the subsequent calculation accuracy is ensured.

[0048] Further, the calculation method of the slab weight provided by the present application fully reflects the mutual influence between various factors in the production plan requirements and actual production process, provides strong data support and basis for subsequent calculation parameter adjustment, and ensures the subsequent calculation accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 The figure is a method flowchart of the present application;

[0050] Figure 2 The figure is an application scene diagram of the present application. DETAILED DESCRIPTION

[0051] The present application will be further described in detail below in combination with the drawings and specific embodiments, so that the present application can be clearly understood.

[0052] Embodiment 1

[0053] In the mode of organizing production according to orders, production needs to be organized from steelmaking according to the requirements of each sales order, because the varieties, specifications and finished product roll weight ranges of order requirements are different, and the production process also has corresponding limitations, in order to ensure that the cast slab can meet the requirements of the final finished product roll weight, the optimal length must be calculated according to the order and process constraints.

[0054] Based on the above technical purposes, the present application provides a slab length optimization method based on order requirements, as shown in Figure 1 The method comprises the following steps:

[0055] S1, determine the upper and lower limits of coil weight, slab width process maximum and minimum value, slab density, slab thickness and comprehensive yield rate according to order requirements;

[0056] S2, determine the slab width of the casting plan according to the order requirements;

[0057] S3, based on the initial slab weight calculated by the maximum slab length and the slab width of the casting plan, calculate the upper and lower limits of the coil weight, and calculate the corresponding coil number;

[0058] S4, determine the calculation method of slab weight according to the calculation result of the coil number and calculate the final slab weight;

[0059] S5, calculate the slab length of the casting plan according to the final slab weight.

[0060] Specifically, the following steps are further included:

[0061] S6, according to the actual process raw material weight of each process, calculate the upper and lower limits of the coil weight, calculate the corresponding coil number, and judge whether the actual process raw material weight meets the preset coil weight requirement according to the calculation result of the coil number.

[0062] Specifically, the following steps are further included:

[0063] S7, determine the maximum and minimum values of the slab length according to the order requirements, and judge whether the calculated slab length of the casting plan meets the maximum and minimum values of the slab length; if it meets, the casting plan is released; otherwise, an error is reported.

[0064] Preferably, in step S1, the coil weight range of the customer order is obtained from the sales system, i.e. the upper limit of the order coil weight Wt_order_max and the lower limit of the order coil weight Wt_order_min, when the final product coil weight falls between the upper and lower limits, i.e. it meets the customer's order.

[0065] In step S1, the process of determining the slab width process maximum and minimum value, slab density, slab length maximum and minimum value, slab thickness and comprehensive yield rate according to the order requirements includes:

[0066] According to the product information required by the order, the process design is completed, and then the corresponding hot coil width, thickness of the order is calculated, and then the capacity of the side press, heating furnace and hot rolling mill is considered, and the corresponding slab width process maximum and slab width process minimum value, slab length and length minimum value, as well as slab density, slab thickness and comprehensive yield rate are calculated. The subsequent calculation of the optimization calculation result of the slab length and width must be between the corresponding upper and lower limits.

[0067] The application designs a process based on order requirements, and considers equipment properties to obtain parameters required for subsequent calculation of slab length, fully considers actual production environment and scene, guarantees calculation precision, and further improves production efficiency.

[0068] In step S2, the process of determining the slab width of the casting plan according to order requirements includes: according to order requirements, orders with slab width ranges in overlapping intervals are set in the same casting, and the slab width of the casting must be between the maximum and minimum slab widths of each order in the casting plan.

[0069] Because the structure of the current production order also changes in real time in the manufacturing system, selecting a suitable plurality of orders to compile a casting plan can effectively improve production efficiency, so the steel grade is required to allow production in the same casting. Because the slab width ranges of different orders often have overlapping intervals, the slab width Width_set of the casting plan can be set, and the set width must be between the maximum slab width W_slab_max and the minimum slab width W_slab_min in the casting, to cover the requirements of different orders, improve production efficiency as much as possible under the premise of meeting order requirements, and save production cost.

[0070] In step S3, the initial slab weight W0 is calculated by using the following formula:

[0071] W0 = Width_set * L_max * H * p

[0072] Where Width_set represents the slab width of the casting plan, L_max represents the maximum slab length, p represents the slab density, and H represents the slab thickness.

[0073] The number of coils N corresponding to the upper limit of the coil weight based on the initial slab weight, and the number of coils n corresponding to the lower limit of the coil weight based on the initial slab weight are calculated by using the following formula:

[0074] N = roundup (W0 * C / Wt_order_max);

[0075] n = rounddown (W0 * C / Wt_order_min);

[0076] Where Wt_order_max represents the upper limit of the coil weight, Wt_order_min represents the lower limit of the coil weight, C represents the comprehensive yield, roundup() represents the result rounding up, and rounddown() represents the result rounding down.

[0077] The initial slab weight and the corresponding calculation method of the number of sub-rolls fully reflect the production plan requirements and the actual production scene, and provide strong data support and basis for subsequent calculation parameter adjustment, thereby ensuring the subsequent calculation accuracy.

[0078] In step S4, the process of determining the calculation method of the slab weight according to the calculation result of the number of sub-rolls and calculating the final slab weight includes:

[0079] If N<=n, the final slab weight We is calculated by using the following formula: We=Width_set*L_max*H*ρ;

[0080] If N>n, the final slab weight We is calculated by using the following formula:

[0081] We=n*Wt_order_min / C.

[0082] The calculation method of the slab weight fully reflects the production plan requirements and the changes of various factors in the actual production process and the mutual influence therebetween, and provides strong data support and basis for subsequent calculation parameter adjustment, thereby ensuring the subsequent calculation accuracy.

[0083] In step S5, the slab length L of the casting plan is calculated by using the following formula:

[0084] L=We / (Width_set*H*ρ).

[0085] In step S6, the number of sub-rolls N' corresponding to the upper limit of the roll weight is calculated according to the actual process raw material weight of each process by using the following formula:

[0086] N'=roundup(Wm*C / Wt_order_max)

[0087] The number of sub-rolls n' corresponding to the lower limit of the roll weight is calculated according to the actual process raw material weight of each process by using the following formula:

[0088] n'=rounddown(Wm*C / Wt_order_min)

[0089] Wherein, Wm represents the actual process raw material weight, C represents the yield, Wt_order_max represents the upper limit of the roll weight, Wt_order_min represents the lower limit of the order roll weight, roundup() represents the result rounding up, and rounddown() represents the result rounding down.

[0090] If n

[0091] According to the above judgment process, if it is determined that the order roll weight range will produce a roll weight surplus material in the finished product process, the order transfer process needs to be considered. The actual production roll weight, as well as the slab width and length determined based on the above process and other order requirements are matched; and the number of rolls N' corresponding to the upper limit of the weight and the number of rolls n' corresponding to the lower limit of the weight of the newly matched order requirements are recalculated, to determine whether the roll weight requirements of the new contract are met.

[0092] Embodiment 2

[0093] The present application provides a slab length optimization system based on order requirements, which is used for the slab length optimization method based on order requirements described in the above technical problem.

[0094] Embodiment 3

[0095] The present application provides a computer readable storage medium, which stores a computer program, characterized in that the computer program is executed by a processor to realize the slab length optimization method based on order requirements described in the above technical solution.

[0096] Embodiment 4

[0097] The present application provides an electronic device, comprising a memory and a processor, which are connected in communication with each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the slab length optimization method based on order requirements described in the above technical solution.

[0098] By applying the present application to the existing manufacturing system's steelmaking continuous casting plan, material order and each unit operation plan preparation module, the required slab length can be obtained in the casting plan stage, ensuring that the subsequent casting task can meet the order requirements, solving the problems of slab length optimization calculation and raw material weight matching, and playing a good role in the optimization of production plan. Figure 2 As shown in the figure, the display device of the manufacturing system displays the number of rolls corresponding to the upper and lower limits of the weight calculated according to the actual process raw material weight of each process, and the red color is the alarm prompt caused by weight mismatch.

[0099] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

Claims

1. A slab length optimization method based on order requirements, characterized by: The method comprises the following steps: According to the order requirements, determine the upper and lower limits of the coil weight, the maximum and minimum values of the slab width, the slab density, the slab thickness and the comprehensive yield; According to the order requirements, determine the slab width of the casting plan; Based on the initial slab weight calculated by the maximum slab length and the slab width of the casting plan, calculate the upper and lower limits of the coil weight and the corresponding number of sub-coils; According to the calculation result of the number of sub-coils, determine the calculation method of the slab weight and calculate the final slab weight; According to the final slab weight, calculate the slab length of the casting plan; The initial slab weight W0 is calculated by the following formula: W0=Width_set·L_max·H·ρ Wherein, Width_set represents the slab width of the casting plan, L_max represents the maximum slab length; ρ represents the slab density, and H represents the slab thickness; The number of sub-coils corresponding to the upper limit of the coil weight based on the initial slab weight N, and the number of sub-coils corresponding to the lower limit of the coil weight based on the initial slab weight n are calculated by the following formula: N=roundup(W0·C / Wt_order_max); n=rounddown(W0·C / Wt_order_min); Wherein, Wt_order_max represents the upper limit of the coil weight, Wt_order_min represents the lower limit of the coil weight; C represents the comprehensive yield; roundup() represents the rounding up result; and rounddown() represents the rounding down result; The process of determining the calculation method of the slab weight according to the calculation result of the number of sub-coils and calculating the final slab weight comprises: If N≦n, the final slab weight We is calculated by the following formula: We=Width_set·L_max·H·ρ; Otherwise, the final slab weight is calculated by the following formula: We=n·Wt_order_min / C; The slab length L of the casting plan is calculated by the following formula:

2. A slab length optimization method based on order requirements according to claim 1, characterized in that: L=We / (Width_set·H·ρ)。 Further comprising the following steps:

3. A slab length optimization method based on order requirements according to claim 1, characterized in that: According to the actual process raw material weight of each process, calculate the upper and lower limits of the coil weight, and calculate the corresponding number of sub-coils according to the calculation result of the number of sub-coils, and judge whether the actual process raw material weight meets the preset coil weight requirement. Further comprising the following steps:

4. A slab length optimization method based on order requirements according to claim 3, characterized in that: According to the order requirements, determine the maximum and minimum values of the slab length, and judge whether the calculated slab length of the casting plan meets the requirements of the maximum and minimum values of the slab length; if yes, release the casting plan; otherwise, report an error. The process of determining the maximum and minimum values of the slab width, the slab density, the maximum and minimum values of the slab length, the slab thickness and the comprehensive yield according to the order requirements comprises: According to the finished product information of the order requirements, complete the process design, and then calculate the corresponding slab width, thickness, slab length and length minimum value, slab density, slab thickness and comprehensive yield by considering the capacity of the side press, heating furnace and hot rolling mill.

5. A slab length optimization method based on order requirements according to claim 3, characterized in that: The process of determining the slab width of the casting plan according to the order requirement includes: according to the order requirement, orders with the slab width range existing overlapping intervals are set in the same casting, and the slab width of the casting must be between the maximum and minimum of the slab width of each order in the casting plan.

6. The slab length optimization method based on order requirement according to claim 2, characterized in that: The following formula is used to calculate the corresponding coil number N' of the upper limit of the coil weight according to the actual process material weight of each process: N' = roundup (Wm·C / Wt_order_max) The following formula is used to calculate the corresponding coil number n' of the lower limit of the coil weight according to the actual process material weight of each process: n' = round down (Wm·C / Wt_order_min) Wherein, Wm represents the actual process material weight, C represents the yield rate; Wt_order_max represents the upper limit of the coil weight, Wt_order_min represents the lower limit of the order coil weight; roundup() represents the result rounding up; round down() represents the result rounding down; If n < N, it is determined that the actual process material weight does not reach the preset coil weight requirement; otherwise, it is determined that the actual process material weight reaches the preset coil weight requirement.

7. A slab length optimization system based on order requirements, characterized by: The system is used to realize the slab length optimization method based on order requirement according to any one of claims 1-6.

8. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to realize the slab length optimization method based on order requirement according to any one of claims 1-6.

9. An electronic device, comprising: Including: The memory and the processor are connected in communication with each other, the memory stores computer instructions, and the processor executes the computer instructions to execute the slab length optimization method based on order requirement according to any one of claims 1-6.

Images