Method for determining non-fossil energy steel

Abstract

To provide a method for determining non-fossil energy steel that takes into account various manufacturing processes and various energy sources.SOLUTION: This method for determining non-fossil energy steel includes steps of: calculating, based on information on the type and energy amount of energy sources used in a steel manufacturing line 4 and information on the energy amount of non-fossil energy for each energy source, a ratio N / S of a total energy amount N of non-fossil energy to a total energy amount S of all energy sources used in the manufacturing line 4 during a specified period; and determining the type and amount of non-fossil energy steel for the steel manufactured during the specified period based on the ratio N / S.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a method for determining non-fossil energy steel materials. [Background technology]

[0002] In recent years, efforts toward a carbon-neutral society have become increasingly important. Accordingly, even Scope 3 businesses that do not directly emit greenhouse gases are increasingly demanding to understand information related to carbon dioxide emissions during manufacturing for parts purchased for their own products. In particular, for steel products, which use a lot of energy during manufacturing, in order to meet this demand, it is a challenge to develop a system that determines which steel products are non-fossil energy steel and discloses this information to purchasers. For example, Patent No. 7075530 discloses an information system that associates certification information that proves that the electricity used in the manufacture of steel products is derived from renewable energy with mill sheet information. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7075530 Summary of the Invention [Problem to be solved by the invention]

[0004] The manufacturing of steel involves many processes, such as steelmaking and rolling. In addition, energy sources used include not only electricity, but also gas, oil, etc. Taking these factors into consideration, it is necessary to determine the type and amount of non-fossil energy steel.

[0005] It is an object of the present invention to provide a method for determining non-fossil energy steel, taking into account the various steps in the production of steel and the various energy sources used in the production of steel. [Means for solving the problem]

[0006] A method for determining non-fossil energy steel according to one embodiment is a method for determining non-fossil energy steel by using a computer including a controller, a storage device, and a communication interface and operating the controller with a program stored in the storage device. This method includes the steps of acquiring information on the type and amount of energy of energy sources used in a steel production line via the communication interface and storing it in the storage device, acquiring information on the amount of non-fossil energy for each energy source via the communication interface and storing it in the storage device, reading out the information on the type and amount of energy of the energy source and the information on the amount of energy of the non-fossil energy from the storage device and calculating a ratio N / S of the total amount of energy N of non-fossil energy to the total amount of energy S of all energy sources used in the production line within a predetermined period based on these information, and determining the type and amount of non-fossil energy steel for steel produced within the predetermined period based on the ratio N / S. Effect of the Invention

[0007] In this non-fossil energy steel determination method, the type and amount of non-fossil energy steel for the manufactured steel are determined from the ratio of the total amount of non-fossil energy N to the total amount of energy used in the manufacture of steel on a steel production line. This method makes it possible to determine non-fossil energy steel taking into account the various processes in the manufacture of steel and the various energy sources used in the manufacture of steel. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram showing a steel manufacturing facility according to one embodiment. [Diagram 2] FIG. 2 is a block diagram of the facility's administrative computer of FIG. 1, along with the devices connected to the administrative computer. [Diagram 3]FIG. 3 is a flow chart showing a method for determining non-fossil energy steel and creating an inspection certificate according to one embodiment, which is performed in the facility of FIG. [Figure 4] FIG. 4 is an example of an inspection certificate prepared by the method shown in the flow chart of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the drawings as appropriate.

[0010] 1 is a schematic diagram showing a steel manufacturing facility 2 according to one embodiment. The facility 2 includes a manufacturing line 4 and a management computer 6. The management computer 6 determines whether the steel is made from non-fossil energy and creates an inspection certificate 7.

[0011] The facility 2 includes a plurality of production lines 4 for producing various steel products. In FIG. 1, as an example, production lines 4 for steel bars 10, metal powder 11, and hot extrusion products 13 are shown. For example, in the production line 4 for steel bars 10, the steel bars 10 are produced using scrap as a raw material. Each production line includes various processes. Although each production line 4 is shown as being separate in FIG. 1, there may be a common process in each production line 4. In FIG. 1, a melting process 12, a casting process 14, a rolling process 16, and an inspection process 18 are shown as representative processes for producing the steel bars 10. In the melting process 12, scrap is fed into an electric furnace 20, and the scrap is melted in the electric furnace 20. The scrap becomes molten steel 8. After impurities are removed from the molten steel 8 and the composition is adjusted, the molten steel 8 is fed into a continuous casting machine 22 in the casting process 14. This forms a bloom 24. The process from the scrap to the bloom 24 is also called a steelmaking process. In the rolling process 16, the bloom 24 is rolled and shaped in several stages. Depending on the product, further treatments such as heat treatment, shot blasting, straightening, etc. are performed. In the inspection process 18, the product is inspected and the steel bar 10, which is a steel product, is completed.

[0012] 2 shows a block diagram of the management computer 6 together with devices connected to the management computer 6. The management computer 6 is connected to the production line 4 via a network 26. The network 26 may be composed of only an intranet, or may be connected via the Internet. An input device 28 and an output device 30 are connected to the management computer 6. The output device 30 is typically a display and a printer. The management computer 6 may be connected to an external system via the network 26.

[0013] 2, the management computer 6 includes a controller 32, a storage device 34, and a communication interface 36. The typical controller 32 is a CPU. The management computer 6 may include a plurality of CPUs as the controller 32. The storage device 34 is typically a semiconductor memory or a hard disk. A plurality of semiconductor memories or hard disks may exist as the storage device 34. A storage device 34 that combines a plurality of semiconductor memories and a hard disk may also be used. The communication interface 36 transmits and receives data via the network 26.

[0014] Fig. 3 is a flow chart showing a method for determining whether a steel product is a non-fossil energy steel product, which is carried out in the steel manufacturing facility 2 in Fig. 1, and a method for creating an inspection certificate 7 for the steel product using the results of the determination. These methods are specifically executed by operating the controller 32 using a program stored in the memory 34. As shown in Fig. 3, this method includes six steps from step S1 to S6. Steps S1 to S4 constitute the method for determining whether a steel product is a non-fossil energy steel product, and steps S1 to S6 constitute the method for creating an inspection certificate 7 for the steel product.

[0015] In step S1, the management computer 6 obtains the types and amounts of energy sources used in all of the production lines 4 from the production lines 4 via the communication interface 36. These energy sources include energy sources used in all of the steel production processes, such as the steelmaking process, the rolling process 16, and the inspection process 18. The amounts of energy are totaled for each type of energy source over a predetermined period of time, and stored in the memory 34 together with the types of energy sources. In this embodiment, the amounts of energy are totaled over a one-year period. This totaling may be performed by the management computer 6, or may be totaled by the production lines 4 and sent to the management computer 6. The predetermined period may be one month, six months, or any other period.

[0016] Table 1 shows an example of calculation of the ratio of the total amount of non-fossil energy to the total amount of energy used in this production line 4, as will be described in detail later. The "energy source" column in Table 1 shows the type of energy source used in the production line 4 in this embodiment, and the "annual usage amount" shows the amount used for each energy source in a given period (one year in this embodiment). In this table, the energy sources are listed separately as energy sources related to greenhouse gas emissions corresponding to Scope 1, such as city gas and gasoline, and energy sources related to greenhouse gas emissions corresponding to Scope 2, such as electricity and steam. Electricity is listed separately for each power company that supplies it. Furthermore, it is listed as a different type of electricity that is certified by a non-fossil certificate as being generated from a non-fossil power source. In this embodiment, of the 20,000,000 kWh of electricity purchased from Company A, 5,000,000 kWh purchased with a non-fossil certificate was generated entirely from non-fossil energy, and the remaining 15,000,000 kWh is treated as being generated from normal energy (energy with a non-fossil energy ratio of 36.1%). Data corresponding to the “energy source” and “annual usage amount” in Table 1 is stored in the memory 34 .

[0017] In step S2, the management computer 6 acquires information on the amount of non-fossil energy for each energy source via the communication interface 36, and stores this information in the storage device 34. For example, in the embodiment of Table 1, the non-fossil energy ratio published by the electric power company for each electric power is input from an input device as information on the amount of non-fossil energy. The "non-fossil energy ratio" in Table 1 is information on the amount of non-fossil energy. Information on the amount of non-fossil energy may also be sent from another system via the network 26. For electric power that is certified by a non-fossil certificate as having been generated from a non-fossil power source, the non-fossil energy ratio is set to 100%.

[0018] It should be noted that steps S1 and S2 do not have to be executed in this order. Step S2 may be executed before S1. Steps S1 and S2 may be executed simultaneously.

[0019] In step S3, the ratio N / S of the total energy amount N of non-fossil energy to the total energy amount S of all energy sources used in the production line 4 during a predetermined period is calculated. In this embodiment, the "annual usage amount" and the "non-fossil energy ratio" for each "energy source" in Table 1 are read from the memory 34 and used to calculate the ratio N / S. In the embodiment of Table 1, the "calorific value per unit amount" for each "energy source" is further used in this calculation. This "calorific value per unit amount" is, for example, a value of the "standard calorific value" listed in a list on the website of the Agency for Natural Resources and Energy, Ministry of Economy, Trade and Industry, and is input in advance to the management computer 6 from an input device and stored in the memory 34. The usage amounts of all the energy sources are expressed as "calorific value (GJ)" by multiplying the "annual usage amount" for each energy source expressed in appropriate units by the "calorific value per unit amount". By adding these up, the total energy amount S of all the energy sources used in the production line 4 is calculated. Meanwhile, the total amount of non-fossil energy N can be calculated by multiplying the amount of energy used, expressed in "calorific value (GJ)", by the "non-fossil energy ratio" of each, and adding these up. From this, the ratio N / S can be calculated. In the example in Table 1, the ratio N / S is expressed as a percentage, and the value is 14.5%.

[0020] [Table 1]

[0021] In step S4, the type and amount of non-fossil energy steel are determined based on the value of the ratio N / S. That is, steel produced during a specified period is classified into "one or more types Ki produced with energy having a non-fossil energy ratio of ni," and the mass mi of each type Ki is determined. In this case, the ratio ni and mass mi are calculated by the sum of (ni×mi / M) for all types Ki when the total mass of steel produced during a specified period is M. Σ(ni×mi / M) is determined so that the ratio N / S is as above. For example, if the total mass M is 1000kt and the ratio N / S is 14.5%, Type K1: Proportion n1=0%, Mass m1=855kt Type K2: proportion n2=100%, mass m2=145kt They are classified into two types: Also, in another example, Type K1: Proportion n1 = 14.5%, Mass m1 = 1000kt The classification rules are input in advance, for example, from an input device and stored in the storage device 34.

[0022] In step S5, the management computer 6 acquires quality information on the manufactured steel material from the production line 4 via the communication interface 36. The quality information may include, for example, the composition of the steel material, mechanical test results, and visual inspection results. Note that step S5 may be performed before any of steps S1 to S4, or may be performed simultaneously with any of steps S1 to 4. Step S5 may be performed before step S6.

[0023] In step S6, the inspection certificate 7, which includes information on non-fossil energy and quality information on the steel product, is output to the output device 30. The inspection certificate 7 may be sent as electronic data to another system via the network 26. An example of the inspection certificate 7 is shown in FIG. 4. This is a mill sheet for steel product of the above-mentioned type K2. Since the proportion n2=100% for this steel product, the information on non-fossil energy states that "the steel product in question is carbon neutral."

[0024] As described above, in this non-fossil energy steel determination method, the type and amount of non-fossil energy steel for the manufactured steel are determined from the ratio of the total amount of non-fossil energy N to the total amount of energy S used in the production of steel in the steel production line 4. This method makes it possible to determine non-fossil energy steel taking into consideration the energy sources used in various processes in the production of steel, such as the steelmaking process and the rolling process 16.

[0025] This method for determining non-fossil energy steel products considers energy sources other than electricity, such as gas and oil, as energy sources used in the production of steel products, and calculates the ratio of the total amount of non-fossil energy, N, to the total amount of energy, S. This method makes it possible to determine non-fossil energy steel products that take into account the various energy sources used in the production of steel products.

[0026] This method for creating the inspection certificate 7 for steel products makes it possible to easily create the inspection certificate 7 that includes information on the quality of the steel product and information on non-fossil energy.

[0027] Table 2 shows an example of calculating the ratio N / S according to other embodiments. The difference from the calculation of the ratio N / S in Table 1 is the handling of the electricity purchased with non-fossil certificates (5,000,000 kWh) and the value of "heat value per unit amount" for each energy source.

[0028] Regarding the handling of electricity purchased under non-fossil energy certificates (5,000,000 kWh), as mentioned above, in Table 1, of the 20,000,000 kWh of electricity purchased from Company A, 5,000,000 kWh was generated using non-fossil energy, and the remaining 15,000,000 kWh was generated using normal energy (energy with a non-fossil energy ratio of 36.1%). In Table 2, the 20,000,000 kWh of electricity purchased from Company A is treated as being generated using normal energy. On that basis, the calorific value generated using fossil energy is calculated as "replaced with the calorific value of non-fossil energy" by the amount of calorific value of electricity purchased under non-fossil energy certificates. In addition, the conversion coefficient used in the periodic report under the Energy Conservation Act (submitted in FY2024 or later) is used for the value of "calorific value per unit amount". In the calculation method in Table 2, the ratio N / S is 20.0%.

[0029] [Table 2]

[0030] As described above, in this embodiment, a non-fossil energy steel product can be determined by taking into consideration various processes in the production of the steel product and various energy sources used in the production of the steel product. From this, the superiority of this embodiment is clear.

[0031] [Disclosure items] The following section discloses preferred embodiments.

[0032] [Item 1] A method for determining non-fossil energy steel using a computer having a controller, a memory, and a communication interface, by operating the controller with a program stored in the memory, comprising: acquiring information on the type of energy source and the amount of energy used in the steel production line via the communication interface and storing the information in a pre-storage unit; acquiring information on the amount of non-fossil energy for each energy source via the communication interface and storing the information in the storage device; A step of reading out the information on the type and amount of energy of the energy source and the information on the amount of energy of the non-fossil energy from the storage device, and calculating, based on the information, a ratio N / S of the total amount of energy N of the non-fossil energy to the total amount of energy S of all the energy sources used in the production line within a predetermined period of time. and determining the type and amount of non-fossil energy steel for the steel produced within the predetermined period based on the N / S ratio; A method for determining non-fossil energy steel materials, including:

[0033] [Item 2] The method for determining non-fossil energy steel material according to item 1, wherein the energy source includes electricity, gas and oil.

[0034] [Item 3] 3. The method for determining a non-fossil energy steel material according to item 1 or 2, wherein the total energy amount S includes the amount of energy used in the steelmaking process and the rolling process.

[0035] [Item 4] When the total mass of the steel products manufactured within the predetermined period is set to M, in the step of determining the type and amount of the non-fossil energy steel products, The steel products manufactured during the period are classified into one or more types Ki, each having a non-fossil energy ratio of ni, and the ratio ni and the mass mi of each type Ki are calculated by the sum of (ni × mi / M) for all types Ki. Σ(ni×mi / M) The method for determining a non-fossil energy steel material according to any one of items 1 to 3, wherein the ratio (N / S) is determined to be the ratio (N / S).

[0036] [Item 5] A method for creating an inspection certificate including information on non-fossil energy steel products, using a computer including a controller, a storage device, and a communication interface, and operating the controller with a program stored in the storage device, comprising: acquiring information on the type of energy source and the amount of energy used in the steel production line via the communication interface and storing the information in a pre-storage unit; acquiring information on the amount of non-fossil energy for each energy source via the communication interface and storing the information in the storage device; acquiring quality information of the steel material produced on the production line via the communication interface and storing the information in a pre-storage unit; A step of reading out the information on the type and amount of energy of the energy source and the information on the amount of energy of the non-fossil energy from the storage device, and calculating, based on the information, a ratio N / S of the total amount of energy N of the non-fossil energy to the total amount of energy S of all the energy sources used in the production line within a predetermined period of time; determining the type and amount of non-fossil energy steel for steel produced within the predetermined period based on the N / S ratio; and A step of outputting an inspection certificate for the steel material based on the quality information of the steel material and the type and amount of the non-fossil energy steel material. How to prepare inspection certificates for steel products, including: [Industrial Applicability]

[0037] The above-described determination of non-fossil energy steel products can be applied to various steel products. [Explanation of symbols]

[0038] 2. Materials manufacturing facilities 4. Production line 6. Management Computer 7. Inspection certificate 8. Molten steel 10...steel bar 12...Dissolution process 14. Casting process 16. Rolling process 18. Inspection process 20. Electric furnace 22. Continuous Casting Machine 24. Bloom 26 Network 28 Input device 30 Output device 32...Controller 34...Memory 36 Communication Interface

Claims

1. A method for determining non-fossil energy steel using a computer having a controller, a memory, and a communication interface, by operating the controller with a program stored in the memory, comprising: acquiring information on the type of energy source and the amount of energy used in the steel production line via the communication interface and storing the information in the memory; acquiring information on the amount of non-fossil energy for each energy source via the communication interface and storing the information in the storage device; A step of reading out the information on the type and amount of energy of the energy source and the information on the amount of energy of the non-fossil energy from the storage device, and calculating, based on the information, a ratio N / S of the total amount of energy N of the non-fossil energy to the total amount of energy S of all the energy sources used in the production line within a predetermined period of time. and determining the type and amount of non-fossil energy steel for the steel produced within the predetermined period based on the ratio N / S; A method for determining non-fossil energy steel materials, including:

2. The method of claim 1 , wherein the energy sources include electricity, gas, and oil.

3. The method according to claim 1 or 2, wherein the total energy amount S includes the amount of energy used in a steelmaking process and a rolling process.

4. When the total mass of the steel products manufactured within the predetermined period is set to M, in the step of determining the type and amount of the non-fossil energy steel products, The steel products manufactured during the period are classified into one or more types Ki having a non-fossil energy ratio of ni, and the ratio ni and the mass mi of each type Ki are calculated by the sum of (ni x mi / M) for all types Ki. Σ(ni×mi / M) The method according to claim 1 or 2, wherein N is determined to be the ratio (N / S).

5. A method for creating an inspection certificate including information on non-fossil energy steel products, using a computer including a controller, a storage device, and a communication interface, and operating the controller with a program stored in the storage device, comprising: acquiring information on the type of energy source and the amount of energy used in the steel production line via the communication interface and storing the information in a pre-storage unit; acquiring information on the amount of non-fossil energy for each energy source via the communication interface and storing the information in the storage device; acquiring quality information of the steel material produced on the production line via the communication interface and storing the information in a pre-storage unit; A step of reading out information on the type and amount of energy of the energy source and information on the amount of energy of the non-fossil energy from the storage device, and calculating, based on the information, a ratio N / S of a total amount of energy N of the non-fossil energy to a total amount of energy S of all the energy sources used in the production line within a predetermined period of time; determining the type and amount of non-fossil energy steel for steel produced within the predetermined period based on the N / S ratio; and A step of outputting an inspection certificate for the steel material based on the quality information of the steel material and the type and amount of the non-fossil energy steel material. How to prepare inspection certificates for steel products, including:

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