Metal element resource recycling system

Abstract

To provide a metal element resource circulation system that can lead to reduction in a natural resource utilization and reduction in an amount of CO2 emission.SOLUTION: In a metal element resource circulation system 1 that comprises nodes 10 to 30 each constituting a network 100 and managing data on a production of a metal compound, at least one node 10 is configured to record natural derivation metal element-amount data 12 in a storage unit 11, at least one node 20 is configured to record waste and the like derivation metal element-amount data 22 in a storage unit 21, at least one node 30 is configured to associate metal element data 32 given to a produced metal compound with the natural derivation metal element-amount data 12 and the waste and the like derivation metal element-amount data 22, and record the associated metal compound data 32 in a storage unit 31. Also, a node 40 is configured to, with reference to the metal compound data 32, grasp a movement of the produced metal compound, prepare tracking data, and record the tracking data in a storage unit 41.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a resource circulation system for metal elements that manages the resource circulation of metal elements.

Background Art

[0002] Conventional linear economic activities (linear economy) that discard consumed resources without recycling and reusing them have caused many environmental problems such as resource and energy shortages, global warming, and waste treatment. Therefore, a circular economic activity (circular economy) that preserves and maintains the value of resources, materials, and products for as long as possible and minimizes the generation of waste has been proposed (see, for example, Non-Patent Document 1).

[0003] In addition, the Japanese government has declared that it aims for carbon neutrality by reducing greenhouse gas emissions to zero as a whole by 2050. "Reducing emissions to zero as a whole" means subtracting the "absorption amount" by afforestation, forest management, etc. from the "emission amount" of greenhouse gases such as carbon dioxide (CO2) to make the total substantially zero. That is, in order to achieve carbon neutrality, it is necessary to reduce the emission amount of greenhouse gases and to preserve and enhance the absorption effect (see, for example, Non-Patent Document 2).

[0004] To achieve carbon neutrality, while promoting the reduction of CO2 emissions through electrification and energy conservation, CCUS (carbon capture, utilization, and storage) technology is also required for CO2 that cannot be avoided from being emitted. As CCUS technology, for example, technologies that utilize metal elements using CO2 recovered from exhaust gases of manufacturing industries, etc. and waste and by-products as raw materials are expected.

Prior Art Documents

Non-Patent Documents

[0005]

Non-Patent Document 1

[0006] By utilizing metal elements derived from waste and by-products as raw materials for metal compounds, it becomes possible to realize a circular economy. Furthermore, by utilizing metal elements derived from waste and by-products as raw materials for metal compounds, it becomes possible to reduce energy-related CO2 emissions generated during the process of obtaining naturally derived metal elements, including raw material procurement, manufacturing, logistics, and sales. Moreover, by utilizing already decarbonized metal elements derived from waste and by-products as alternative raw materials to naturally derived metal elements, it becomes possible to reduce non-energy-related CO2 emissions associated with reducing the use of naturally derived metal elements. However, since it is difficult to determine whether the metal elements used are manufactured based on metal elements derived from waste, it has been difficult to ascertain whether the use of naturally derived metal elements utilizing natural resources is actually being reduced, and whether CO2 emissions are actually being reduced.

[0007] In other words, in order to understand whether the use of naturally derived metal elements from natural resources is being reduced, and whether CO2 emissions are being reduced, it is necessary to clearly determine whether the metal elements used in the production of metal compounds are manufactured based on metal elements derived from waste or other sources. Therefore, the present invention aims to provide a resource recycling system for metal elements that can contribute to reducing the use of natural resources and CO2 emissions by managing data on the amount of naturally derived metal elements and the amount of metal elements derived from waste, etc., used to produce metal compounds, thereby clarifying whether the metal elements used are manufactured based on metal elements derived from waste, etc., and by understanding the amount of naturally derived metal elements and CO2 emissions that utilize natural resources in the movement of metal compounds (from production to disposal). [Means for solving the problem]

[0008] In order to solve the above problems, we conducted thorough research and found that by managing data on the amount of naturally derived metal elements in the resources used to produce metal compounds and data on the amount of metal elements derived from waste, etc., via a network, it is possible to clearly determine whether the metal elements used are manufactured based on metal elements derived from waste, etc. This solves the above problems. The present invention was completed based on the above findings. The present invention is as follows.

[0009] [1] A resource recycling system for metal elements, each comprising nodes that constitute a network and manage data relating to the production of metal compounds, wherein at least one node calculates the amount of naturally derived metal elements used as raw materials among the metal elements used in the production of metal compounds, generates data on the amount of naturally derived metal elements based on the calculated amount of naturally derived metal elements, and records the data on the amount of naturally derived metal elements in the network; at least one node calculates the amount of waste-derived metal elements used as raw materials among the metal elements used in the production of metal compounds, generates data on the amount of waste-derived metal elements based on the calculated amount of waste-derived metal elements, and records the data on the amount of waste-derived metal elements in the network; and at least one node links the data on the amount of naturally derived carbon metal elements and the data on the amount of waste-derived metal elements to the metal element data assigned to the produced metal compound, and records the linked metal element data in the network. [2] The resource recycling system for metal elements according to [1], wherein at least one node tracks the movement of the produced metal compound and records tracking data in the network. [3] The metal element resource recycling system according to [1] or [2], wherein at least one node identifies a metal compound in which the proportion of naturally derived metal elements among the metal elements used in production is 98% or less. [4] The metal compound comprises at least one alkali metal and alkali earth metal in the resource recycling system of metal elements according to any one of [1] to [3]. [5] A method for distinguishing between naturally derived metal elements and metal elements derived from waste, etc., is to make a comprehensive determination based on the results of analysis by observing the particle shape by SEM, quantifying trace elements by XRF, and quantifying trace elements by ICP-OES, a resource recycling system for metal elements as described in any of [1] to [4]. [6] The network is a blockchain network, a resource recycling system for metallic elements as described in any of [1] to [5]. [7] A resource recycling system for metal elements according to any one of [1] to [6], wherein at least one node adds data on energy-derived CO2 emissions when using the naturally derived metal elements to the data on the amount of naturally derived metal elements, and at least one node adds data on energy-derived CO2 emissions when using the metal elements derived from waste, etc. to the data on the amount of metal elements derived from waste, etc. [Effects of the Invention]

[0010] According to the present invention, by managing data on the amount of naturally derived metal elements and the amount of metal elements derived from waste, etc., used to produce metal compounds, it is possible to clarify whether the metal elements used are manufactured based on metal elements derived from waste, etc., and by understanding the amount of naturally derived metal elements and CO2 emissions that utilize natural resources in the movement of metal compounds (from production to disposal), it is possible to provide a resource recycling system for metal elements that can lead to a reduction in the use of natural resources and a reduction in CO2 emissions. [Brief explanation of the drawing]

[0011] [Figure 1] This is a conceptual diagram showing an example of a resource recycling system for metal elements according to this embodiment. [Modes for carrying out the invention]

[0012] As shown in Figure 1, the metal element resource recycling system 1 according to an embodiment of the present invention (hereinafter sometimes simply referred to as "this embodiment") comprises nodes 10, 20, 30, 40, 50, and 60, each constituting a network 100 and managing data related to the production of metal compounds. The metal compounds described herein are metal compounds containing at least one metal element, such as alkali metals, alkali earth metals, amphoteric metals, and transition metals, and are particularly characterized by containing at least one alkali metal and alkali earth metal. The metal compounds are not particularly limited as long as they contain a metal element, and include, for example, hydrogen compounds, oxides, small oxoacids, hydroxides, halides, sulfates, nitrates, carbonates, acetates, and metal complexes (coordination compounds) that contain a metal element. When alkali metals are included in a metal compound, examples include alkali metal hydrogen compounds, oxides, small oxoacids, hydroxides, halides, sulfates, nitrates, carbonates, acetates, and metal complexes (coordination compounds). Among these, alkali metal oxides and their complex oxides, hydroxides, halides, sulfates, sulfites, nitrates, and nitrites are preferred, and alkali metal oxides, hydroxides, and sulfates are more preferred. Specific examples of alkali metals include, for example, lithium oxide, lithium hydroxide and its monohydrate, lithium chloride, lithium sulfate, lithium nitrite, sodium oxide, sodium hydroxide, sodium chloride, sodium sulfate and its decahydrate, sodium silicate, soda ash, soda lime, potassium hydroxide, potassium chloride, potassium sulfate, potassium nitrate, potassium silicate, potassium alum, and the like. When alkaline earth metals are included in a metal compound, examples include alkaline earth metal hydrogen compounds, oxides, minor oxoacids, hydroxides, halides, sulfates, sulfites, nitrates, nitrites, carbonates, acetates, and metal complexes (coordination compounds). Among these, alkaline earth metal hydrogen compounds, oxides, minor oxoacids, hydroxides, halides, sulfates, nitrates, nitrites, acetates, and metal complexes (coordination compounds) are preferred, and alkaline earth metal oxides and their complex oxides, hydroxides, halides, sulfates, and nitrates are more preferred. Specific examples of alkaline earth metals include, for example, calcium oxide, calcium hydroxide, calcium chloride and their hydrates (dihydrate, tetrahydrate, hexahydrate), calcium sulfate and its hydrates (hemihydrate, dihydrate), calcium nitrate and its tetrahydrate, magnesium oxide, magnesium hydroxide, magnesium chloride and its hexahydrate, magnesium nitrate and its hexahydrate, and so on.

[0013] The network 100 of the present invention connects nodes on an information and communication network, and data on the amount of naturally derived metal elements, data on the amount of metal elements derived from waste, etc., and metal element data are processed and recorded in a distributed manner using cryptographic technology. The network 100 is an information and communication network such as the internet, intranet, cloud network, and blockchain network, and among these, a blockchain network is preferred. By the network 100 being a blockchain network, high availability and data integrity can be achieved by having the above data, which has a data structure that is easy to detect tampering with using digital signatures and hash pointers, held by a large number of distributed nodes. As the blockchain network, a consortium-type blockchain is preferred, but other forms such as a public blockchain may also be used.

[0014] Although Figure 1 shows six nodes in the metal compound resource recycling system 1, the number of nodes is not limited to six; it may be five or fewer, or seven or more. Each node in the metal compound resource recycling system 1 is connected to each other via the network 100 so that they can communicate with one another. Each node is equipped with a storage unit capable of storing the above data. For example, storage media such as ROM, RAM, and hard disks can be used as the storage unit. Each node is equipped with an input unit for inputting and storing data in the memory unit. The input unit can employ the user interface of an information processing device, such as a mouse, keyboard, touch panel, or voice input device.

[0015] At least one node 10 constituting the network 100 calculates the amount of naturally derived metal elements used in the production of metal compounds, specifically those derived from naturally occurring metal elements. Methods for calculating the amount of naturally derived metal elements include calculating it from the amount of raw materials used to extract the naturally derived metal elements used in the production of metal compounds, or calculating it from the ratio of naturally derived metal elements among the metal elements used in the production of metal compounds, as described later. Node 10 then generates naturally derived metal element amount data 12 based on the calculated amount of naturally derived metal elements. The naturally derived metal element amount data 12 is data concerning the amount of naturally derived metal elements used in metal compounds, specifically those that are derived from naturally occurring metal elements. Then, node 10 records the naturally occurring metal element quantity data 12 in the memory unit 11 provided in node 10. Recording the naturally occurring metal element quantity data 12 in the memory unit 11 provided in node 10 that constitutes the network 100 is equivalent to recording the naturally occurring metal element quantity data 12 in the network 100.

[0016] At least one node 20 constituting the network 100 calculates the amount of metal elements derived from waste and by-products among the metal elements used in the production of metal compounds. Methods for calculating the amount of metal elements derived from waste and by-products include calculating it from the amount of raw materials used to extract the metal elements derived from waste used in the production of metal compounds, and calculating it from the ratio of metal elements derived from waste among the metal elements used in the production of metal compounds, as described later. Then, node 20 generates metal element amount data 22 derived from waste or the like based on the calculated amount of metal elements derived from waste or the like. The metal element amount data 22 derived from waste or the like is data regarding the amount of metal elements derived from waste or the like, which uses waste or by-products as raw materials, among the metal elements used in metal compounds. Then, node 20 records the metal element amount data 22 derived from waste or the like in the storage unit 21 provided in node 20. By recording the metal element amount data 22 derived from waste or the like in the storage unit 21 provided in node 20 that constitutes the network 100, it is synonymous with recording the metal element amount data 22 derived from waste or the like in the network 100.

[0017] At least one node 30 that constitutes the network 100 associates the natural origin metal element amount data 12 and the metal element amount data 22 derived from waste or the like with the metal compound data 32 assigned to the produced metal compound. Then, node 30 records the metal compound data 32 associated with the natural origin metal element amount data 12 and the metal element amount data 22 derived from waste or the like in the storage unit 31 provided in node 30. By recording the metal compound data 32 associated with the natural origin metal element amount data 12 and the metal element amount data 22 derived from waste or the like in the storage unit 31 provided in node 30 that constitutes the network 100, it is synonymous with recording the metal compound data 32 associated with the natural origin metal element amount data 12 and the metal element amount data 22 derived from waste or the like in the network 100.

[0018] At least one node 40 that constitutes the network 100 refers to the metal compound data 32, grasps the movement of the produced metal compound, and creates tracking data (not shown) in the network 100. Then, node 40 records the tracking data in the storage unit 41 provided in node 40. By recording the tracking data in the storage unit 41 provided in node 40 that constitutes the network 100, it is synonymous with recording the tracking data in the network 100. By recording tracking data in network 100, and by accessing network 100 and referring to the tracking data, it is possible to understand the movement of metal compounds (from production to disposal). Furthermore, by linking the metal compound data 32 of the metal compounds with the data 12 of naturally derived metal elements and the data 22 of metal elements derived from waste, etc., it becomes possible to understand the movement of the amount of naturally derived metal elements used in the metal compounds and the amount of metal elements derived from waste, etc.

[0019] At least one node 50 constituting the network 100 calculates the ratio of naturally derived metal elements in the metal elements used in the production of metal compounds by referring to metal compound data 32 linked to naturally derived metal element amount data 12 and waste-derived metal element amount data 22, and creates ratio calculation data (not shown). Then, node 50 refers to the ratio calculation data to identify metal compounds in which the ratio of naturally derived metal elements is 98% or less, and records in the metal compound data 32 of metal compounds in which the ratio of naturally derived metal elements is 98% or less that it is a good ratio. In this specification, the ratio of naturally derived metal elements refers to the ratio on a mass basis. Then, node 50 records the ratio calculation data in the memory unit 51 provided in node 50. Recording the ratio calculation data in the memory unit 51 provided in node 50, which constitutes the network 100, is equivalent to recording the ratio calculation data in the network 100. By using metal compounds in which the proportion of naturally derived metal elements identified by Node 50 is 98% or less, it becomes possible to realize a circular economy. Furthermore, when using metal elements derived from waste and by-products that have already been decarbonized as alternative raw materials to naturally derived metal elements, using metal compounds in which the proportion of naturally derived metal elements identified by Node 50 is 98% or less makes it possible to reduce non-energy-related CO2 emissions associated with reducing the amount of natural metal elements used, thereby contributing to a reduction in CO2 emissions. The ratio of naturally occurring metal elements identified by Node 50 is a threshold that enables a circular economy and reduces non-energy-related CO2 emissions associated with reducing the use of naturally occurring metal elements, and is not limited to 98%, but may be, for example, 80% or 50%.

[0020] At least one node 60 constituting the network 100 creates raw material identification data (not shown) that identifies whether the metal elements used in the production of the metal compound are naturally derived metal elements or metal elements derived from waste, etc. For example, node 60 can create raw material identification data by referring to metal compound data 32 linked to naturally derived metal element amount data 12 and waste, etc. derived metal element amount data 22. Furthermore, node 60 can also include the ratio of naturally derived metal elements and metal elements derived from waste, etc., in the raw material identification data for the metal elements used in the production of metal compounds. Then, node 60 records the raw material identification data in the storage unit 61 provided in node 60. Recording the raw material identification data in the storage unit 61 provided in node 60, which constitutes the network 100, is equivalent to recording the raw material identification data in the network 100. Methods for identifying whether the metal elements used in the production of a metal compound are naturally derived or derived from waste, etc., include referring to the metal compound data 32, as well as analysis results from particle shape observation by SEM, trace element quantification by XRF, and trace element quantification by ICP-OES. It is preferable to make a comprehensive determination of the metal elements used in the production of the metal compound based on the analysis results from particle shape observation by SEM, trace element quantification by XRF, and trace element quantification by ICP-OES.

[0021] According to the resource recycling system 1 for metal compounds of this embodiment, the metal compound data 32 assigned to the produced metal compound is linked to the data 12 for the amount of naturally derived metal elements and the data 22 for the amount of metal elements derived from waste, etc. Therefore, by referring to the metal compound data 32, it is possible to clarify whether the metal elements used as raw materials were manufactured based on metal elements derived from waste, etc., and the amount of metal elements derived from waste, etc. used as raw materials. Furthermore, according to the resource recycling system 1 for metal compounds of this embodiment, by managing data on the amount of naturally derived metal elements and the amount of metal elements derived from waste, etc., of resources used to produce metal compounds, and by ensuring that the majority of the metal elements used as raw materials are manufactured from metal elements derived from waste, etc., it becomes possible to realize a circular economy. In addition, by ensuring that the majority of the metal elements used as raw materials are manufactured from metal elements derived from waste, etc., it becomes possible to reduce energy-related CO2 emissions emitted from raw material procurement, manufacturing, logistics, sales, etc., until naturally derived metal elements are obtained. Moreover, by using already decarbonized waste-derived metal elements made from waste and by-products as alternative raw materials to naturally derived metal elements, it becomes possible to reduce non-energy-related CO2 emissions associated with reducing the amount of naturally derived metal elements used. In other words, by reducing the amount of naturally derived metal elements used, it becomes possible to reduce energy-related CO2 emissions and non-energy-related CO2 emissions, leading to a reduction in total CO2 emissions, which are the sum of energy-related CO2 emissions and non-energy-related CO2 emissions.

[0022] [Modified examples of embodiments] The resource recycling system 1 according to this embodiment may further include nodes and storage units (not shown) that handle ownership data relating to the ownership of metal compounds and metal elements used to produce metal compounds. The ownership data is data indicating the origin and location of metal compounds and metal elements used to produce metal compounds, and is data for managing the origin and location of metal compounds and metal elements used to produce metal compounds. By recording the ownership data in the network 100 so that it moves along with the movement of metal compounds and metal elements used to produce metal compounds, it is possible to manage the current location, origin, and past location of metal compounds and metal elements used to produce metal compounds. By managing the ownership data, it is also possible to grasp the movement of the amount of naturally derived metal elements used in metal compounds and the amount of metal elements derived from waste, etc. Owners recorded as ownership data include, but are not limited to, agricultural, forestry, and fisheries businesses, foresters, fishermen, miners, manufacturers and importers, demolition companies, recyclers, consulting firms, design firms, construction companies, research institutions, owners of metal compounds, electricity and gas companies, transportation companies, trading companies, agencies, wholesalers and cooperatives, financial and insurance companies, real estate companies, service companies, etc. If there are two or more owners, they can be recorded as co-owners.

[0023] [Other embodiments] The above explanation focuses primarily on realizing a circular economy and does not specifically address energy-related CO2 emissions. However, the resource recycling system 1 for metal elements can be designed to include data on energy-related CO2 emissions. By including energy-related CO2 emission data, the resource recycling system 1 for metal elements can help understand the energy-related CO2 emissions associated with the production of metal compounds and contribute to reducing energy-related CO2 emissions.

[0024] Specifically, at least one node 10 constituting the network 100 adds data on energy-related CO2 emissions when using naturally derived metal elements that are derived from natural metal elements to the naturally derived metal element quantity data 12. The data on energy-related CO2 emissions when using naturally derived metal elements that are derived from natural metal elements includes data on CO2 emissions emitted up to the time the naturally derived metal elements are manufactured (first energy-related CO2 emissions) and data on CO2 emissions emitted up to the time the metal compounds are manufactured using the naturally derived metal elements (second energy-related CO2 emissions). The first energy-related CO2 emissions are the total amount of CO2 emissions generated during the process of obtaining naturally derived metal elements, such as through raw material procurement, manufacturing, logistics, and sales. The second energy-related CO2 emissions are the total amount of CO2 emissions generated during the process of converting naturally derived metal elements into metal compounds, such as through fuel combustion and electricity use.

[0025] Furthermore, at least one node 20 constituting the network 100 adds data on energy-related CO2 emissions when using metal elements derived from waste and by-products as raw materials to the waste-derived metal element quantity data 22. The data on energy-related CO2 emissions when using metal elements derived from waste and by-products as raw materials includes data on CO2 emissions emitted up to the point of manufacturing the waste-derived metal elements (third energy-related CO2 emissions) and data on CO2 emissions emitted up to the point of manufacturing metal compounds using the waste-derived metal elements (fourth energy-related CO2 emissions). The third energy-related CO2 emissions are the total amount of CO2 emissions generated from raw materials, such as during raw material procurement, manufacturing, logistics, and sales, up to the point where metal elements derived from waste and by-products are obtained. The fourth energy-related CO2 emissions are the total amount of CO2 emissions generated from raw materials, such as during fuel combustion and electricity use, up to the point where metal elements derived from waste and by-products are converted into cement and concrete materials.

[0026] In another embodiment of the metal element resource recycling system 1, data on energy-related CO2 emissions when utilizing naturally derived metal elements is added to the naturally derived metal element quantity data 12, and data on energy-related CO2 emissions when utilizing waste-derived metal elements is added to the waste-derived metal element quantity data 22, thereby creating a metal element resource recycling system that can grasp energy-related CO2 emissions. [Industrial applicability]

[0027] In the resource recycling of metal compounds, this invention manages data on the amount of naturally derived metal elements in metal compound resources and data on the amount of metal elements derived from waste, etc., via a network. By understanding the amount of naturally derived metal elements and CO2 emissions during the movement of metal compounds (from production to disposal), it is possible to reduce the use of natural resources and CO2 emissions. [Explanation of Symbols]

[0028] 1. Resource Recycling System for Metal Compounds 10, 20, 30, 40, 50, 60 nodes 11,21,31,41,51,61 Storage section 12. Data on the amount of naturally occurring metallic elements 22. Data on the amount of metal elements derived from waste, etc. 32 Metal Compound Data 100 Networks

Claims

1. A resource recycling system for metal elements, comprising nodes that each constitute a network and manage data related to the production of metal compounds, wherein the network manages data on the amount of naturally derived metal elements used to produce the metal compounds and data on the amount of metal compounds derived from waste, etc., At least one node calculates the amount of naturally derived metal elements used as raw materials among the metal elements used in the production of metal compounds, generates data on the amount of naturally derived metal elements based on the calculated amount of naturally derived metal elements, and records the data on the amount of naturally derived metal elements in the network. At least one of the nodes calculates the amount of metal elements derived from waste and by-products among the metal elements used in the production of metal compounds, generates data on the amount of metal elements derived from waste based on the calculated amount of metal elements derived from waste, and records the data on the amount of metal elements derived from waste in the network. At least one node assigns metal compound data obtained by linking the naturally derived metal element amount data and the waste-derived metal element amount data to each produced metal compound, and records the metal compound data in the network. The aforementioned data on the amount of naturally derived metal elements refers to the amount of naturally derived metal elements used as raw materials in metal compounds. The aforementioned data on the amount of metal elements derived from waste, etc., is data relating to the amount of metal elements used in the metal compound that originates from waste, etc., which are made from the aforementioned waste and by-products. The node records the naturally derived metal element amount data, the waste-derived metal element amount data, and the metal compound data in the storage unit provided in the node, which is equivalent to recording the naturally derived metal element amount data, the waste-derived metal element amount data, and the metal compound data in the network. The amount of the aforementioned naturally derived metal element is calculated from the amount of raw materials used to extract the aforementioned naturally derived metal element in the production of the metal compound. The amount of metal elements derived from the aforementioned waste is calculated from the amount of raw materials used to extract the metal elements derived from the aforementioned waste used in the production of the metal compound. The aforementioned network is a blockchain network, A resource recycling system for metal elements, wherein the metal element is at least one of alkali metals, alkali earth metals, amphoteric metals, and transition metals.

2. At least one of the nodes creates tracking data showing the movement of the produced metal compound from production to disposal, and records the tracking data in the network to understand the movement of the produced metal compound. Furthermore, the resource recycling system for metal elements according to claim 1, wherein the node records the tracking data in a storage unit provided in the node, which is equivalent to recording the tracking data in the network.

3. At least one node refers to the metal compound data, which is linked to the data on the amount of naturally derived metal elements and the data on the amount of metal elements derived from waste, etc., to calculate the ratio of naturally derived metal elements in the metal elements used in the production of the metal compound, creates ratio calculation data from the calculated ratio of naturally derived metal elements, and identifies the metal compound in which the ratio of naturally derived metal elements among the metal elements used in production is 98% or less, by referring to the ratio calculation data. Furthermore, the resource recycling system for metal elements according to claim 1, wherein the node records the ratio calculation data in a storage unit provided in the node, which is equivalent to recording the ratio calculation data in the network.

4. The resource recycling system for metal elements according to claim 1, wherein the metal compound comprises at least one alkali metal and alkali earth metal.

5. At least one of the nodes identifies whether the metal elements used in the production of the metal compound are either naturally derived metal elements or metal elements derived from waste, etc., based on the results of analysis including observation of particle shape by SEM, quantification of trace elements by XRF, and quantification of trace elements by ICP-OES, and creates raw material identification data based on the identification result. Furthermore, the resource recycling system for metal elements according to claim 1, wherein the node records the raw material identification data in the storage unit provided in the node, which is equivalent to recording the raw material identification data in the network.

6. At least one of the nodes utilizes the energy-derived CO2 when using the naturally occurring metal element. ２ As data regarding emissions, the first energy-derived CO2 emitted before obtaining the aforementioned naturally derived metal element ２ The emissions are calculated and obtained, and the second energy-derived CO2 emitted when the naturally occurring metal elements become the metal compounds is also calculated. ２ The emissions are calculated and obtained, and the obtained energy-derived CO2 ２ From the data on emissions, the first energy-related CO2 ２ Total amount of emissions and the second energy-derived CO2 ２ The total amount of emissions is added to the data on the amount of naturally derived metal elements. At least one of the nodes obtains data on the energy origin CO ２ emission amount as the third energy origin CO emission amount discharged until obtaining the metal element derived from the waste or the like, and also obtains the fourth energy origin CO ２ emission amount discharged until the metal element derived from the waste or the like becomes the metal compound, and adds the total amount of the obtained energy origin CO ２ emission amount data to the waste or the like-derived metal element amount data, ２ calculates and obtains the total amount of the third energy origin CO ２ emission amount and the total amount of the fourth energy origin CO ２ emission amount, Furthermore, the node has a memory unit equipped with the energy-derived CO ２ By recording data on emissions, the network can access the energy-derived CO2 ２ A resource recycling system for metal elements according to claim 1, which is equivalent to recording data on emissions.

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