JP7075530B1 - Information processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the feasibility of carbon neutrality of a steel product. SOLUTION: A method for manufacturing a steel product in an electric furnace using electric power defined by a non-fossil value or a zero emi value. [Selection diagram] Fig. 1

Description

The present disclosure relates to a method for manufacturing a steel product, a steel product, and an information processing method.

In October 2020, the Government of Japan declared "2050 Carbon Neutral". Furthermore, as a new greenhouse gas reduction target for FY2030, the Japanese government has announced a policy of reducing it by 46% compared to FY2013. Toward carbon neutrality in 2050, efforts in the energy field, which accounts for more than 80% of greenhouse gas emissions, are important. In particular, decarbonization of the electric power sector is important.

When manufacturing steel products using conventional electric furnaces, most of the energy used is electric power. When electric power is generated by thermal power generation, oxygen dioxide is emitted during power generation. On the other hand, when electricity is generated from a non-fossil power source, carbon dioxide is not emitted.

An object of the present disclosure made in view of such circumstances is to provide a manufacturing method, a steel product, and an information processing method for enhancing the feasibility of carbon neutrality of a steel product.

The manufacturing method according to one embodiment of the present disclosure is a manufacturing method of a steel product in an electric furnace using electric power defined by a non-fossil value or a zero emi value.

The steel product according to the embodiment of the present disclosure is manufactured by the above manufacturing method.

The steel product according to the embodiment of the present disclosure includes mill sheet information about a production lot and proof information certifying that the electric power used for the production of the production lot is the electric power defined by the non-fossil value or the zero emi value. Associated with.

The information processing method according to the embodiment of the present disclosure is
It is an information processing method using an information processing device that is connected to a network so that it can communicate with each other.
It involves associating mill sheet information about a production lot of steel products with proof information certifying that the power used to manufacture the production lot is power defined by non-fossil value or zero emi value.

The information processing method according to the embodiment of the present disclosure is
It is an information processing method using an information processing device that is connected to a network so that it can communicate with each other.
When the power generation process of the purchased electric power is a process that uses renewable energy and energy other than renewable energy in a complex manner, it is necessary to identify the electric power derived from the renewable energy among the above electric powers.
Corresponding the proof information certifying that the specified electric power is derived from renewable energy to the mill sheet information about the production lot of the steel product, and
including.

According to the method for manufacturing steel products, the steel products, and the information processing method according to the embodiment of the present disclosure, the feasibility of carbon neutrality of the steel products can be enhanced, and therefore the following contributions and social effects due to the contributions can be enhanced. Can be caused. That is, as the first effect, it is possible to visualize that the electric power used for manufacturing the steel product is the electric power defined by the non-fossil value or the zero emi value. In this way, since it is possible for society to recognize the environmental value of carbon-neutral steel products in an easy-to-understand manner, it is possible to improve the environmental value. As a second effect, the customer who purchased the steel product can enjoy the environmental value of the carbon-neutral steel product with the minimum cost increase. As a third effect, the manufacturer of steel products can allocate the profits obtained from the production to the development of a carbon-neutral ironmaking method and the like. The fourth effect is that steel products that contribute to reducing the burden on the environment can be manufactured, so we aim to build a society that enables sustainable development with less burden on the environment, and thus the health of the people now and in the future. (Quoted from "Act on Promotion of Procurement of Environmental Goods, etc. by the State, etc." in Japan).

Further, according to the method for manufacturing a steel product, the steel product, and the information processing method according to the embodiment of the present disclosure, the feasibility of carbon neutrality of the steel product can be enhanced, and thus the following economic effects are produced. Can be made to. That is, as the first effect, it is possible to raise the comprehensive evaluation from the government for the manufacturers of steel products, so that it is possible to increase the possibility of winning a successful bid in competitive bidding, thereby expanding the order volume and profits. Can be done. As a second effect, it is possible to capture the demand from customers who desire a carbon-neutral steel product, so that the selling price of the steel product can be increased. As a third effect, when this patent application is patented, a royalty (for example, an electric furnace manufacturer that manufactures steel products) is set by setting a license to the person who implements the invention according to the patent. There is a possibility that you can get a license fee).

It is a schematic diagram of the electric furnace of this embodiment. It is a figure which shows the slab semi-finished product manufactured using an electric furnace. It is a figure which shows an example of a mill sheet. It is a schematic diagram of the information processing apparatus and a network of this embodiment. It is a block diagram which shows the structure of an information processing apparatus. It is a figure which shows the blockchain. It is a figure which shows the data structure of the manufacturing lot DB (database). It is a flowchart which shows the operation of an information processing apparatus.

In the manufacturing method of this embodiment, a steel product is manufactured by an electric furnace. As shown in FIG. 1, the electric furnace EF applies a high voltage to the electrode EL to generate arc heat, and the iron scrap SC is melted by the arc heat. The molten steel MS produced by melting is processed into a steel product after undergoing processes such as component adjustment, casting and rolling.

The electric power used in the electric furnace EF of the present embodiment is electric power that does not emit carbon dioxide and is generated from a non-fossil power source such as renewable energy. Renewable energy here means the following energy sources.
(1) Solar (2) Wind power (3) Hydropower (4) Geothermal (5) Biomass (organic substances derived from animals and plants that can be used as an energy source (crude oil, petroleum gas, combustible natural gas and coal, and products manufactured from them are excluded). ).)
(Vi) In addition to the energy sources 1 to 5 above, of the energy sources other than crude oil, petroleum gas, combustible natural gas and coal, and products manufactured from these, they can be permanently used as an energy source for electricity. Those specified by government ordinance as permitted

Non-fossil power sources include not only renewable energy, but also nuclear power, for example. The electricity generated from non-fossil power sources includes the following two.
1. 1. Value of electricity itself (kWh value, etc.)
2. 2. Value as a non-fossil In this embodiment, the "value as a non-fossil" out of the above two values is referred to as a non-fossil value. In the electric furnace EF, the power defined by the non-fossil value is used. The non-fossil value here is the value recorded as a non-fossil power source when calculating the non-fossil power source ratio under the "Energy Supply Structure Advancement Law" of Japan. Non-fossil value is the value purchased by a new electricity retailer to achieve a set target.

Power defined by non-fossil value can be obtained and proved using, for example, at least one of the following three means:
(1) Non-fossil certificate (2) Green power certificate (3) J credit

A non-fossil certificate is a certificate of the environmental value of electricity generated by renewable energy.

A green power certificate is a certificate of the environmental value of electricity generated by renewable energy. The green power certificate is unique because it has a serial number. The green power certificate contains information on the amount of power generated, the period of power generation, the method of power generation, and the date of issue of the certificate. The green power certificate also contains information on the name of the certification body and the name of the issuer of the certificate.

J-credit is a system in which the national government certifies the amount of emission reduction and absorption of greenhouse gases such as carbon dioxide as "credits".

As an additional or alternative example, power defined by non-fossil value can also be obtained and proved by the following means:
(4) Power generation using the solar power generation equipment owned by the company

As an alternative, the power used in the electric furnace EF may be power defined by zero emi value rather than power defined by non-fossil value. The zero-emi value here is the value at which the carbon dioxide emission factor under the "Act on Promotion of Global Warming Countermeasures" (hereinafter referred to as the "warm-to-war method") in Japan is zero. Specifically, the zero emi value is the actual carbon dioxide emissions calculated by multiplying the amount of electricity of the non-fossil certificate procured by the electricity retailer by the "national average coefficient" when calculating the adjusted emission factor. It is a value that can be subtracted from emissions. When a power purchaser in the manufacturing industry reports carbon dioxide emissions to the national government based on the warm-up method, the carbon dioxide emission factor of power with zero emi value becomes zero. For example, the electric power defined by the zero emi value may be electric power generated by an existing electric power sales company using renewable energy such as hydropower or nuclear power. Power defined with zero emi value can be obtained and proved by the following means:
(5) Contract with electricity retailer (eg "Aqua Premium" (registered trademark) and "Aqua Energy 100" provided by TEPCO Energy Partner (registered trademark))

For each of the means (1) to (5) exemplified above, there is only information such as a certificate certifying that the electric power used in the electric furnace EF is the electric power defined by the non-fossil value or the zero emi value. Obtained from a certificate issuer or certification body as unique certification information. The above means (1) to (5) are examples and can be replaced by any other means to prove that the power used in the electric furnace EF is power defined by non-fossil value or zero emi value. be.

In the present invention, as a method for certifying that the electric power used in the electric furnace EF is the electric power defined by the non-fossil value or the zero energy value, the proof information is obtained by any of the above (1) to (5). Or if the certification information is not available, use any certification information (for example, carbon dioxide emission factor (residue)) published by the electric power company to specify only the power derived from renewable energy. (Details will be described later).

Returning to the description of the figure, the steel product is manufactured from at least one of the following slab semi-finished products, for example as shown in FIG.
・ Billet 21
・ Bloom 22
・ Slab 23

The steel product manufactured from the slab semi-finished product may be, for example, at least one of the following products.
・ Deformed steel bars ・ Flat steel ・ Small and medium-sized shaped steel ・ H-shaped steel (large shaped steel, steel sheet pile)

A mill sheet is attached to the manufactured steel products. A mill sheet is an inspection certificate that certifies whether a steel product meets requirements such as specified standards. As shown in FIG. 3, the mill sheet includes, for example, the following mill sheet information 31 to 38 and certification information 39.
・ Certificate number 31 (unique serial number)
-Manufacturing lot number 32
・ Product dimensions 33
・ Number 34
・ Mass 35
・ Tensile test result 36
・ Bending test result 37
・ Chemical composition 38
・ Certification information 39 (here, as an example, the serial number of the green power certificate)

For example, the mill sheet information and the proof information certifying that the electric power used in the electric furnace EF is the power defined by the non-fossil value or the zero emi value are information processing operated by the manager of the electric furnace EF or the like. It is electronically acquired by the device 1 and stored in the storage unit 13 of the information processing device 1. As an alternative example, the mill sheet information and the certification information may be manually input by the user and stored in the storage unit 13 of the information processing apparatus 1.

As shown in FIG. 4, the information processing apparatus 1 is one of the nodes communicably connected to the network NW. The information processing device 1 can communicate with each other with one or more other information processing devices 2 to 5 via the network NW. In FIG. 4, five information processing devices 1 to 5 are connected to the network NW, but the number of information processing devices is arbitrary. Since the hardware configuration of the information processing devices 2 to 5 is the same as the hardware configuration of the information processing device 1, the description thereof is omitted here.

The information processing device 1 is a computer such as a server belonging to a cloud computing system or another computing system. As an alternative example, the information processing device 1 may be a mobile device such as a mobile phone, a smartphone, a wearable device, or a tablet. As another alternative example, the information processing device 1 may be a general-purpose device such as a PC or a dedicated device. "PC" is an abbreviation for personal computer.

The internal configuration of the information processing apparatus 1 will be described in detail with reference to FIG.

The information processing device 1 includes a control unit 11, a communication unit 12, and a storage unit 13. Each component of the information processing apparatus 1 is communicably connected to each other via, for example, a dedicated line.

The control unit 11 includes, for example, one or more general-purpose processors including a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). The control unit 11 may include one or more dedicated processors specialized for a specific process. The control unit 11 may include one or more dedicated circuits instead of including the processor. The dedicated circuit may be, for example, an FPGA (Field-Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit). The control unit 11 may include an ECU (Electronic Control Unit). The control unit 11 transmits and receives arbitrary information via the communication unit 12.

The communication unit 12 includes a communication module corresponding to one or more wired or wireless LAN (Local Area Network) standards for connecting to the network NW. The communication unit 12 may include a module corresponding to one or more mobile communication standards including LTE (Long Term Evolution), 4G (4th Generation), or 5G (5th Generation). The communication unit 12 communicates with one or more short-range communication standards or specifications including Bluetooth®, AirDrop®, IrDA, ZigBee®, FeliCa®, or RFID. It may include modules and the like. The communication unit 12 transmits and receives arbitrary information via the network NW.

The storage unit 13 includes, but is not limited to, for example, a semiconductor memory, a magnetic memory, an optical memory, or a combination of at least two of them. The semiconductor memory is, for example, RAM or ROM. The RAM is, for example, an SRAM or a DRAM. The ROM is, for example, EEPROM. The storage unit 13 may function as, for example, a main storage device, an auxiliary storage device, or a cache memory. The storage unit 13 may store information on the result analyzed or processed by the control unit 11. The storage unit 13 may store various information and the like related to the operation or control of the information processing device 1. The storage unit 13 may store a system program, an application program, embedded software, and the like. The storage unit 13 may be provided outside the information processing device 1 and accessed from the information processing device 1.

The network NW is, for example, a distributed ledger (Hyperledger) type blockchain network. In this case, all the nodes connected to the network NW hold the same data as one or more blocks in chronological order.

The network NW may be a public network connected to the Internet or a private network.

The storage unit 13 of the information processing device 1 stores the blockchain BC as shown in FIG. The blockchain BC is shared by all the nodes in the blockchain network NW. Here, for convenience of explanation, the case where the blockchain BC includes the first block B1, the second block B2, the third block B3, and the fourth block B4 will be described. The number of blocks contained in the blockchain BC is arbitrary.

The first block B1 is the first block of the blockchain BC and contains the transaction data T1. In FIG. 6, one block contains three transaction data. However, the number of transaction data contained in one block is arbitrary.

The second block B2 includes the hash H2 of the first block B1 which is the previous block, the nonce value N2 corresponding to the hash H2, and the transaction data T2.

The description of the third block B3 and the fourth block B4 will be omitted in order to avoid duplicate explanations.

The control unit 11 of the information processing apparatus 1 defines the mill sheet information of the steel product and the electric power used in the electric furnace EF at the time of manufacturing the steel product as non-fossil value or zero emi value for each production lot of the steel product. Integrate with proof information that proves that it is electric power. Here, the proof information can be obtained by the following method. In order to realize that the electricity used in the electric furnace EF is the electricity defined by the non-fossil value or the zero emi value, first, the electricity from which the steel product of the production lot number indicated on the target mill sheet is manufactured is manufactured. The amount of electricity used per steel ton is calculated from the actual amount of electricity used in the factory corresponding to one heat of the furnace EF. The calculation may be performed by the control unit 11 (for example, a process computer) or may be performed manually (the same shall apply hereinafter). One heat is molten steel that is melted at one time in the electric furnace EF. Steel products are manufactured lot by lot from the molten steel that has been melted. Next, the actual power consumption used to manufacture the target steel product is calculated by multiplying the power consumption per ton of steel by the product weight described on the target mill sheet. By setting the power of this actual power consumption as non-fossil power, it is possible to realize and prove that the power used in the electric furnace EF is the power defined by the non-fossil value or the zero emi value.

As a specific method of integrating the mill sheet information and the certification information, the control unit 11 relates the block B1 of the block chain BC and the mill sheet information M1 in association with the production lot L1, as shown in the production lot DB of FIG. And the proof information V1 are stored in the storage unit 13. That is, the mill sheet information M1 and the certification information V1 are registered as transaction data in the block B1 of the blockchain BC. The registered information is stored as a blockchain BC token. As an alternative example, the certification information V1 may be embedded in the mill sheet information M1.

The control unit 11 can disclose the mill sheet information M1 and the certification information V1 to an arbitrary third party on the Internet or the like.

An information processing method by the control unit 11 of the information processing apparatus 1 will be described with reference to FIG.

In step S1, the control unit 11 contains mill sheet information about the production lot of the steel product and proof information certifying that the electric power used for manufacturing the production lot is the electric power defined by the non-fossil value or the zero emi value. To get.

In step S2, the control unit 11 is integrated by associating the mill sheet information with the certification information.

In step S3, the control unit 11 registers the associated mill sheet information and the certification information in the network NW (for example, the blockchain network NW). Step S3 is optional.

In step S4, the control unit 11 publishes the associated mill sheet information and certification information on the Internet. Step S4 is optional.

[Modification example]
In the above embodiment, the mill sheet information and the certification information are associated and stored in the storage unit 13. However, the control unit 11 may not be able to obtain certification information such as a green power certificate. Therefore, when the power generation process of the electric power purchased by the electric power consumer is a process in which renewable energy and energy other than renewable energy are used in combination, the control unit 11 regenerates the purchased and used electric power. Only power derived from renewable energies can be identified. Such identification can be performed by using arbitrary certification information (for example, carbon dioxide emission factor (residue)) disclosed by an electric power company or the like. The control unit 11 may store the certification information in association with the mill sheet information.

As described above, if the power generation process of the electric power purchased by the electric power consumer is a process in which renewable energy and energy other than the renewable energy are used in combination, the renewable energy among the purchased and used electric power is used. Only the power of origin can be identified. The reasons that can be identified are as follows in the "Ministry of Economy, Trade and Industry 15th Comprehensive Resources and Energy Study Group Electricity and Gas Business Subcommittee, Electricity and Gas Basic Policy Subcommittee System Review Working Group (November 28, 2017)". This is because it was stipulated in. That is, if it is assumed that as a result of an auction of a non-fossil certificate subject to FIT (Feed-in Tariff), an unsold non-fossil certificate will be generated, the non-fossil certificate will be the next. It cannot be carried over after the fiscal year and is considered to be "surplus non-fossil electricity equivalent", but the consumer bears the cost as a FIT levy for the zero-emi value of the environmental value related to the surplus non-fossil electricity equivalent. In view of the fact that it is doing so, it was decided to allocate it according to the share of the amount of electricity sold without burying the value.

In addition, the carbon dioxide emission factors of electric power companies this year may be disclosed after the end of the year. In this case, the carbon dioxide emission factor for this year can be calculated by the control unit 11 by the following procedure.
Procedure 1. From the carbon dioxide emission factor and non-fossil power ratio of the previous year, the usable amount of non-fossil power on the basis of the previous year is estimated, and the estimation result is reflected in the planned power plan to be used at the factory this year. As an alternative example, for the non-fossil power ratio, the renewable energy ratio target value for this year described in the energy environment plan published by any local government may be adopted.
Step 2. We will allocate non-fossil electricity this year in response to customer requests.
Step 3. When the carbon dioxide emission factor for this year is released, the actual results of the allocation of non-fossil electricity and the allocation of the remaining electricity other than non-fossil electricity will be adjusted and finalized.

If the power generation process is a process that uses both renewable energy and energy other than renewable energy in a complex manner, the method of specifying only the power derived from renewable energy among the purchased and used power is as follows. Can be obtained by In order to realize that the electricity used in the electric furnace EF is the electricity defined by the non-fossil value or the zero emi value, first, the electricity from which the steel product of the production lot number indicated on the target mill sheet is manufactured is manufactured. The amount of electricity used per steel ton is calculated from the actual amount of electricity used in the factory corresponding to one heat of the furnace EF. The calculation may be performed by the control unit 11 (for example, a process computer) or may be performed manually (the same shall apply hereinafter). One heat is molten steel that is melted at one time in the electric furnace EF. Steel products are manufactured lot by lot from the molten steel that has been melted. Next, the amount of molten steel produced from the electric power derived from the renewable energy is calculated by multiplying the amount of molten steel melted at one time by the renewable energy ratio disclosed by the electric power company or the like. The control unit 11 associates and integrates the amount of electric power derived from the renewable energy used with the mill sheet of the steel product manufactured by using the molten steel produced from the electric power derived from the renewable energy.

[effect]
As described above, according to the present embodiment, the steel product is manufactured in an electric furnace using electric power defined by non-fossil value or zero emi value. Here, the steel product manufactured in the electric furnace is composed of a single material of steel only, and the main raw material is iron scrap. Also, most of the energy used in electric furnaces (eg 80% or more) is electric power. Due to these circumstances, carbon dioxide emitted from coke and the like used in the manufacturing process is offset by procuring electric power defined by non-fossil value or zero emi value (for example, green electric power) and using it in an electric furnace. be able to. That is, offsetting means calculating the amount of non-fossil power used corresponding to energy such as coke, additionally describing the calculated amount of non-fossil power used on the mill sheet, and using the non-fossil power used in the manufacture of steel products. It is done by associating with steel products. Therefore, it is possible to manufacture carbon-neutral steel products. Moreover, even in a small lot, it is easy to prove that the steel product is carbon neutral. Therefore, PR (promotion, promotion of understanding) activities such as raising the selling price are easy.

In contrast, various parts derived from various raw materials are used in the manufacture of automobiles and the like. In addition, the energy used during manufacturing is diverse, such as electric power, gas, and petroleum. In this case, in order to prove that the product is carbon neutral, it is necessary to prove that all the individual parts are carbon neutral. Therefore, the proof is very complicated and difficult. Ecolabels based on LCA evaluation can be used to achieve carbon neutrality, but the impact is weak because qualitative evaluation is made. Moreover, the evaluation is only an overall evaluation. Therefore, in the case of manufacturing automobiles and the like, it is highly likely that it will be difficult to manufacture carbon-neutral products.

Further, according to the present embodiment, the information processing apparatus 1 determines that the mill sheet information about the production lot of the steel product and the electric power used for the production of the production lot are the electric power defined by the non-fossil value or the zero emi value. Associate with proof information to certify. This configuration results in a steel product that is associated with mill sheet information about the production lot and certification information that proves that the power used to manufacture the production lot is power defined by non-fossil value or zero emi value. , It is easy to prove that the manufactured steel products are carbon neutral.

Further, according to the present embodiment, the network NW includes a blockchain network, and the associated mill sheet information and certification information are registered in the blockchain. When the blockchain technology is used in this way, the registration information is distributed and shared by all the nodes. That is, no central administrator is required. Therefore, the following effects are achieved.
-Difficult to tamper with-There is no system down because there is no single point of failure-Since data sharing with other systems is easy, the information processing device 1 can realize a system with high safety and low cost. .. Furthermore, traceability is ensured because all data is recorded on the blockchain.

Further, according to the present embodiment, the control unit 11 discloses the associated mill sheet information and the certification information on the Internet. With this configuration, the information processing apparatus 1 can externally indicate that the steel product is carbon neutral.

Further, according to the present embodiment, when the power generation process of the purchased electric power is a process in which renewable energy and energy other than renewable energy are used in combination, the control unit 11 is derived from the renewable energy among the electric power. Identifies the power of the product and correlates the proof information certifying that the identified power is from renewable energy with the mill sheet information for the production lot of steel products. With this configuration, the information processing apparatus 1 can prove that the steel product is partially carbon-neutral even when energy other than renewable energy is used in the power generation process.

This disclosure will be described with reference to the drawings and examples, but it should be noted that those skilled in the art may make various modifications and modifications based on the present disclosure. Other changes are possible without departing from the spirit of this disclosure. For example, the functions and the like included in each means or each step can be rearranged so as not to be logically inconsistent, and a plurality of means or steps can be combined or divided into one.

For example, in the above embodiment, a program that executes all or part of the functions or processes of the information processing apparatus 1 can be recorded on a computer-readable recording medium. Computer-readable recording media include non-temporary computer-readable media, such as magnetic recording devices, optical discs, opto-magnetic recording media, or semiconductor memories. The distribution of the program is carried out, for example, by selling, transferring, or renting a portable recording medium such as a DVD (Digital Versatile Disc) or a CD-ROM (Compact Disc Read Only Memory) on which the program is recorded. Further, the distribution of the program may be performed by storing the program in the storage of an arbitrary server and transmitting the program from the arbitrary server to another computer. The program may also be provided as a program product. The present disclosure can also be realized as a program that can be executed by a processor.

For example, the computer temporarily stores the program recorded on the portable recording medium or the program transferred from the server in the main storage device. Then, the computer reads the program stored in the main storage device by the processor, and executes the processing according to the read program by the processor. The computer may read the program directly from the portable recording medium and perform processing according to the program. The computer may sequentially execute processing according to the received program each time the program is transferred from the server to the computer. The process may be executed by a so-called ASP type service that realizes the function only by the execution instruction and the result acquisition without transferring the program from the server to the computer. "ASP" is an abbreviation for application service provider. The program includes information used for processing by a computer and equivalent to the program. For example, data that is not a direct command to the computer but has the property of defining the processing of the computer corresponds to "a program-like data".

NW network 1 Information processing device 11 Control unit 12 Communication unit 13 Storage unit 2 to 5 Information processing device

Claims (1)

It is an information processing method using an information processing device.
The information processing device includes a control unit, a communication unit, and a storage unit, and is connected to the network via the communication unit so as to be communicable.
By the control unit
When the power generation process of the purchased electric power is a process that uses renewable energy and energy other than renewable energy in a complex manner, it is necessary to identify the electric power derived from the renewable energy among the above electric powers.
The proof information certifying that the specified electric power is derived from renewable energy is stored in the storage unit in association with the mill sheet information about the production lot of the steel product.
Including
The above identification is
To calculate the amount of electricity used per ton of steel from the actual amount of electricity used in the electric furnace from which the steel product was manufactured.
By multiplying the amount of molten steel melted at one time by the renewable energy ratio, the amount of molten steel produced from electric power derived from renewable energy can be calculated.
From the amount of electric power used per ton of steel and the amount of molten steel produced from the electric power derived from the renewable energy, the amount of electric power derived from the renewable energy used to manufacture the steel product is calculated. ,
Information processing method performed by .

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