An evaluation method and an evaluation device for quantitatively tracing contribution of steel slag to carbon sequestration and classifying carbon sequestration paths

Abstract

The application provides an evaluation method and an evaluation device for carbon sequestration contribution quantitative tracing and carbon sequestration path classification of steel slag, comprising S1. Steel slag component determination: determining the carbon content of steel slag before and after carbonization and the free total calcium content of steel slag before and after carbonization; S2. Steel slag component carbon sequestration contribution quantitative tracing: calculating the total carbon sequestration rate of steel slag according to the carbon content of steel slag before and after carbonization; calculating the carbon sequestration contribution rate of the free total calcium component according to the free total calcium content of steel slag before and after carbonization and the total carbon sequestration rate of steel slag; calculating the carbon sequestration contribution rate of the mineral component according to the carbon sequestration contribution rate of the free total calcium component; S3. Carbon sequestration path classification evaluation: calculating the carbon sequestration contribution ratio according to the carbon sequestration contribution rate of the free total calcium component and the carbon sequestration contribution rate of the mineral component, and classifying and evaluating the carbon sequestration path based on the carbon sequestration contribution ratio. The application can accurately calculate the carbon sequestration rate of steel slag, and distinguish the carbon sequestration contribution efficiency of the free total calcium and the minerals in steel slag, thereby promoting the formation of a comprehensive and scientific carbon sequestration efficiency evaluation system.

Description

Technical Field

[0001] This application belongs to the field of material testing and analysis technology by measuring the properties of materials, specifically involving an evaluation method and device for quantitative tracing of the carbon fixation contribution of steel slag and classification of carbon fixation pathways. Background Technology

[0002] The carbonization process of steel slag involves multiple carbon fixation pathways: on the one hand, free calcium oxide and calcium hydroxide can directly react with carbon dioxide to form calcium carbonate; on the other hand, mineral phases such as dicalcium silicate and tricalcium silicate can also react with carbon dioxide. The reaction mechanisms, reaction rates, and response characteristics to process parameters of different carbon fixation pathways vary significantly. Accurately distinguishing and quantitatively assessing the carbon fixation contribution of each pathway is of great guiding significance for optimizing the steel slag carbonization process and improving carbon fixation efficiency. However, existing methods for assessing the carbon fixation efficiency of steel slag usually cannot distinguish the carbon fixation contribution of different carbon fixation components, making it difficult to accurately explore and compare the activation effects of different carbon fixation processes on the deep carbon fixation potential of steel slag.

[0003] Therefore, there is an urgent need to develop a method that can quantitatively trace the contribution of different carbon fixation pathways in steel slag and classify and evaluate these pathways. Summary of the Invention

[0004] To this end, this application provides an evaluation method and device for quantitatively tracing the carbon fixation contribution of steel slag and classifying carbon fixation pathways. It can calculate the carbon fixation rate of steel slag with high accuracy and distinguish the carbon fixation contribution efficiency of free total calcium and minerals in steel slag, thereby promoting the formation of a comprehensive and scientific carbon fixation efficiency evaluation system.

[0005] The first aspect of this application provides an assessment method for quantitatively tracing the contribution of steel slag to carbon sequestration and classifying carbon sequestration pathways, including: S1. Steel slag composition determination: Determine the carbon content and total free calcium content of steel slag before and after carbonization; S2. Quantitative traceability of carbon fixation contribution of each component of steel slag: The total carbon fixation rate of steel slag is calculated based on the carbon content of steel slag before and after carbonization; the carbon fixation contribution rate of free total calcium component is calculated based on the free total calcium content and total carbon fixation rate of steel slag before and after carbonization; the carbon fixation contribution rate of mineral components is calculated based on the carbon fixation contribution rate of free total calcium component. S3. Classification and evaluation of carbon fixation pathways: The carbon fixation contribution ratio is calculated based on the carbon fixation contribution rate of free total calcium components and the carbon fixation contribution rate of mineral components, and the carbon fixation pathways are classified and evaluated based on the carbon fixation contribution ratio.

[0006] In one optional embodiment of this application, the determination of the carbon content and total free calcium content of the steel slag before and after carbonization includes: determining the carbon content of the steel slag before and after carbonization using a carbon-sulfur analyzer, and determining the total free calcium content of the steel slag before and after carbonization using ethylene glycol-EDTA titration.

[0007] In one optional embodiment of this application, the carbon content of steel slag is determined using a carbon-sulfur analyzer in the range of 0.2% to 30.0%. During the determination process, tungsten particles and pure iron are used as fluxes, with the amount of tungsten particles added being 1.0g to 2.0g and the amount of pure iron added being 0.1g to 0.6g. The analytical gas is high-purity oxygen with a purity ≥99.5%, and the input pressure is controlled at 0.18MPa±5%. The analytical gas flow rate is controlled at 3 to 4.5L / min, and the analysis time is 40 to 60s.

[0008] In one optional embodiment of this application, when determining the free total calcium content using the ethylene glycol-EDTA titration method, the leaching process is carried out in a water bath shaker at a temperature of 70–90°C, a shaking speed of 300–600 r / min, and a leaching time of 15–30 min. A calcium indicator is prepared by grinding calcium carboxylic acid and potassium nitrate at a mass ratio of 1:40–60 to indicate the titration endpoint. For samples with a free total calcium content of <0.5% in steel slag, the sample weight is appropriately increased to 1–2 g to ensure that the volume of EDTA standard solution consumed in the titration is not less than 5 mL.

[0009] In one optional embodiment of this application, the step of calculating the total carbon fixation rate of steel slag based on the carbon content of steel slag before and after carbonization; calculating the carbon fixation contribution rate of free total calcium component based on the free total calcium content and total carbon fixation rate of steel slag before and after carbonization; and calculating the carbon fixation contribution rate of mineral components based on the carbon fixation contribution rate of free total calcium component; includes, The total carbon fixation rate of steel slag is calculated using the following formula. : Where: ω C2 —Carbon content of steel slag after carbonization, % ω C1 — Carbon content of steel slag before carbonization, % 12 — Relative atomic mass of C; 44 — Relative molecular mass of CO2; The carbon fixation contribution rate of the free total calcium component is calculated using the following formula. : Where: ω f2 —Total free calcium content in steel slag after carbonization, % ω f1 —Total free calcium content in steel slag before carbonization, % —Total carbon fixation rate of steel slag, % 56—Relative molecular mass of CaO; 44 — Relative molecular mass of CO2; The carbon sequestration contribution rate of mineral components is calculated using the following formula. : in: —Contribution of free total calcium to carbon fixation,%.

[0010] In one optional embodiment of this application, the carbon fixation pathway classification and evaluation includes: calculating the carbon fixation contribution ratio based on the carbon fixation contribution rate of free total calcium components and the carbon fixation contribution rate of mineral components, and classifying and evaluating the carbon fixation pathways based on the carbon fixation contribution ratio, including: The free total calcium-mineral carbon fixation contribution ratio was calculated using the following formula. calculate: in: —Contribution of free total calcium to carbon fixation, % —Mineral component carbon fixation contribution rate, % The carbon fixation contribution ratio With preset threshold Comparison: when ≥ At that time, it was determined to be "dominantly free calcium carbon fixation pathway"; when < At that time, it was determined to be "mineral carbon fixation pathway manifestation type".

[0011] A second aspect of this application provides a device for quantitative tracing and carbon fixation pathway classification and assessment of the carbon fixation contribution of steel slag, comprising, The data acquisition module is used to acquire the measured carbon content and total free calcium content of steel slag before and after carbonization. The quantitative traceability module is used to calculate the total carbon fixation rate of steel slag based on the carbon content of steel slag before and after carbonization; to calculate the carbon fixation contribution rate of free total calcium components based on the free total calcium content and total carbon fixation rate of steel slag before and after carbonization; and to calculate the carbon fixation contribution rate of mineral components based on the carbon fixation contribution rate of free total calcium components. The carbon fixation pathway classification and evaluation module is used to calculate the carbon fixation contribution ratio based on the carbon fixation contribution rate of free total calcium components and the carbon fixation contribution rate of mineral components, and to classify and evaluate carbon fixation pathways based on the carbon fixation contribution ratio.

[0012] In one optional embodiment of this application, the data acquisition module is further used to acquire information such as a preset threshold for carbon fixation contribution ratio, steel slag type, particle size, and carbonization process parameters. The data acquisition includes acquiring data that is manually input or automatically imported by the detection equipment.

[0013] In one optional embodiment of this application, the carbon fixation pathway classification and evaluation module is further configured to generate an analysis report for display and / or storage based on the calculation results; The analysis report includes pie charts or bar charts showing the contribution rates of each component; When there are multiple types of steel slag, the analysis report includes a comparison view generated based on multiple data. This view presents four indicators for each type of steel slag object in a parallel chart format: total carbon fixation rate of steel slag, carbon fixation contribution rate of free total calcium components, carbon fixation contribution rate of mineral components, and carbon fixation contribution ratio. The slag can be sorted according to at least one of the indicators.

[0014] In one optional embodiment of this application, the quantitative traceability module is further used to perform data verification before calculation: to verify the rationality of the input measurement data, and when any data exceeds the preset theoretical reasonable range or the logical relationship is not valid, the system automatically alarms and prompts for re-examination.

[0015] This invention provides an evaluation method and apparatus for quantitatively tracing the carbon fixation contribution of steel slag and classifying carbon fixation pathways. The method obtains the carbon content and free total calcium content of the steel slag before and after carbonization; calculates the total carbon fixation rate, the carbon fixation contribution rate of free total calcium, and the carbon fixation contribution rate of mineral components; and classifies the carbon fixation pathway into "free calcium-dominated" or "mineral-dominated" types by calculating the free total calcium-mineral carbon fixation contribution ratio and comparing it with a preset threshold. This achieves quantitative analysis and tracing of the contributions of different components in the carbon fixation process of steel slag, promoting the formation of a comprehensive and scientific carbon fixation efficiency evaluation system. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an evaluation method for quantitative tracing of the carbon sequestration contribution of steel slag and classification of carbon sequestration pathways, as shown in an embodiment of this application.

[0018] Figure 2 This is a schematic diagram of a device for quantitative tracing of carbon sequestration contribution and classification and evaluation of carbon sequestration pathways in steel slag, as shown in an embodiment of this application.

[0019] Figure 3 This is a schematic diagram of the structure of an electronic device shown in an embodiment of this application. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Among related technologies, the technology of fixing carbon dioxide using steel slag is one of the important technical paths to realize the resource utilization of industrial solid waste. The calcium-based components (such as free calcium oxide, dicalcium silicate, tricalcium silicate, etc.) in steel slag are the main active substances in the carbonization reaction. Among them, free calcium oxide and calcium hydroxide (collectively referred to as total free calcium) have the highest activity, and their degree of carbonization directly affects the stability and resource utilization value of steel slag.

[0022] This application provides an evaluation method for quantitatively tracing the contribution of steel slag to carbon sequestration and classifying carbon sequestration pathways, including: S1. Steel slag composition determination: Determine the carbon content and total free calcium content of steel slag before and after carbonization; S2. Quantitative traceability of carbon fixation contribution of each component of steel slag: The total carbon fixation rate of steel slag is calculated based on the carbon content of steel slag before and after carbonization; the carbon fixation contribution rate of free total calcium component is calculated based on the free total calcium content and total carbon fixation rate of steel slag before and after carbonization; the carbon fixation contribution rate of mineral components is calculated based on the carbon fixation contribution rate of free total calcium component. S3. Classification and evaluation of carbon fixation pathways: The carbon fixation contribution ratio is calculated based on the carbon fixation contribution rate of free total calcium components and the carbon fixation contribution rate of mineral components, and the carbon fixation pathways are classified and evaluated based on the carbon fixation contribution ratio.

[0023] In one embodiment provided in this application, the determination of the carbon content and total free calcium content of the steel slag before and after carbonization includes: determining the carbon content of the steel slag before and after carbonization using a carbon-sulfur analyzer, and determining the total free calcium content of the steel slag before and after carbonization using ethylene glycol-EDTA titration.

[0024] In one embodiment provided in this application, the carbon content of steel slag is determined to be in the range of 0.2% to 30.0% using a carbon-sulfur analyzer. During the determination process, tungsten particles and pure iron are used as fluxes, with the amount of tungsten particles added being 1.0g to 2.0g and the amount of pure iron added being 0.1g to 0.6g. The analytical gas is high-purity oxygen with a purity ≥99.5%, and the input pressure is controlled at 0.18MPa±5%. The analytical gas flow rate is controlled at 3 to 4.5L / min, and the analysis time is 40 to 60s.

[0025] In one embodiment provided in this application, when determining the free total calcium content using the ethylene glycol-EDTA titration method, the leaching process is carried out in a water bath shaker at a temperature of 70–90°C, a shaking speed of 300–600 r / min, and a leaching time of 15–30 min. A calcium indicator is prepared by grinding calcium carboxylic acid and potassium nitrate at a mass ratio of 1:40–60 to indicate the titration endpoint. For samples with a free total calcium content of <0.5% in steel slag, the sample weight is appropriately increased to 1–2 g to ensure that the volume of EDTA standard solution consumed in the titration is not less than 5 mL.

[0026] In one embodiment provided in this application, the step of calculating the total carbon fixation rate of steel slag based on the carbon content of steel slag before and after carbonization; calculating the carbon fixation contribution rate of free total calcium component based on the free total calcium content and total carbon fixation rate of steel slag before and after carbonization; and calculating the carbon fixation contribution rate of mineral components based on the carbon fixation contribution rate of free total calcium component; includes, The total carbon fixation rate of steel slag is calculated using the following formula. : Where: ω C2 —Carbon content of steel slag after carbonization, % ω C1 — Carbon content of steel slag before carbonization, % 12 — Relative atomic mass of C; 44 — Relative molecular mass of CO2; The carbon fixation contribution rate of the free total calcium component is calculated using the following formula. : Where: ω f2 —Total free calcium content in steel slag after carbonization, % ω f1 —Total free calcium content in steel slag before carbonization, % —Total carbon fixation rate of steel slag, % 56—Relative molecular mass of CaO; 44 — Relative molecular mass of CO2; The carbon sequestration contribution rate of mineral components is calculated using the following formula. : in: —Contribution of free total calcium to carbon fixation,%.

[0027] In one embodiment provided in this application, the carbon fixation pathway classification and evaluation includes: calculating the carbon fixation contribution ratio based on the carbon fixation contribution rate of free total calcium components and the carbon fixation contribution rate of mineral components, and classifying and evaluating the carbon fixation pathways based on the carbon fixation contribution ratio, including: The free total calcium-mineral carbon fixation contribution ratio was calculated using the following formula. calculate: in: —Contribution of free total calcium to carbon fixation, % —Mineral component carbon fixation contribution rate, % The carbon fixation contribution ratio With preset threshold Comparison: when ≥ At that time, it was determined to be "dominantly free calcium carbon fixation pathway"; when < At that time, it was determined to be "mineral carbon fixation pathway manifestation type".

[0028] The method provided in this application is applicable to carbon sequestration assessment of steel slag after direct carbonization treatment, wherein direct carbonization treatment refers to the process in which solid steel slag directly undergoes a mineralization reaction with a gas containing carbon dioxide.

[0029] In one embodiment provided by this application, the total free calcium content is the sum of free calcium oxide and calcium hydroxide calculated as calcium oxide (CaO), and the mineral components are all carbon-fixing mineral phases other than free calcium oxide and calcium hydroxide, including but not limited to dicalcium silicate (C2S) and tricalcium silicate (C3S).

[0030] In one embodiment provided in this application, the preset threshold T ranges from 0.8 to 3.0, and is set according to the type, particle size and process parameters of the steel slag and the direct carbonization treatment.

[0031] This invention aims to address the aforementioned deficiencies in existing technologies by introducing a novel approach of quantitatively tracing the contribution of steel slag carbon fixation and classifying carbon fixation pathways. It constructs a complete technical solution encompassing calculation methods and detection systems. In terms of evaluation, it achieves analysis of carbon fixation contributions, classifying carbon fixation pathways into two categories: "free calcium-dominated" and "mineral-driven," clearly identifying the main contributing components of the carbon fixation process. This provides clear and quantitative data support for the targeted development, screening, and optimization of deep carbon fixation processes, significantly improving R&D efficiency.

[0032] Example According to the evaluation method provided by this invention, a quantitative source tracing and carbon fixation pathway classification assessment was conducted on a sample of converter steel slag from a steel enterprise after direct carbonization treatment. The direct carbonization treatment conditions were: CO2 concentration 75%, temperature 600℃, and carbonization time 120 min.

[0033] S101. Determination of steel slag components: Measure the carbon content of steel slag before and after carbonation and the total free calcium content of steel slag before and after carbonation. Specifically: A carbon-sulfur analyzer is used to determine the carbon content of the steel slag before and after carbonation, and the carbon content ω of the steel slag before carbonation C1 =2.39%, and the carbon content ω of the steel slag after carbonation C2 =3.82%.

[0034] The ethylene glycol-EDTA titration method is used to determine the total free calcium content of the steel slag before and after carbonation, and the total free calcium content ω of the steel slag before carbonation f1 =2.39%, and the total free calcium content ω of the steel slag after carbonation f2 =0.14%.

[0035] S102. Quantitative traceability of carbon sequestration contribution of each component in steel slag: Calculate the total carbon sequestration rate of steel slag based on the carbon content of steel slag before and after carbonation; calculate the carbon sequestration contribution rate of the total free calcium component based on the total free calcium content of steel slag before and after carbonation and the total carbon sequestration rate of steel slag; calculate the carbon sequestration contribution rate of the mineral component based on the carbon sequestration contribution rate of the total free calcium component. Specifically: Step 1: Calculate the total carbon sequestration rate of steel slag Step 2: Calculate the carbon sequestration contribution rate of the total free calcium component Step 3: Calculate the carbon sequestration contribution rate of the mineral component S103. Classification and evaluation of carbon sequestration paths: Calculate the carbon sequestration contribution ratio based on the carbon sequestration contribution rate of the total free calcium component and the carbon sequestration contribution rate of the mineral component, and perform classification and evaluation on the carbon sequestration paths based on the carbon sequestration contribution ratio. Specifically including: Step 1: Calculate the total free calcium-mineral carbon sequestration contribution ratio Step 2: Classification and evaluation of carbon sequestration paths. In this embodiment, a preset threshold T=1.2 is set according to the type, particle size of the steel slag and the direct carbonation process parameters. The ratio Q is compared with the preset threshold T: Q=0.406, T=1.2, Q<T. Therefore, it is determined that the carbon sequestration path of this steel slag sample is: "Mineral carbon sequestration path manifested type".

[0036] Result analysis The detection and calculation results of this embodiment show that under the carbonization process conditions, the total carbon fixation rate of steel slag is 6.10%. Among them, the carbon fixation contribution rate of free total calcium is 28.87%, and the carbon fixation contribution rate of mineral components is 71.13%, with a free total calcium-mineral carbon fixation contribution ratio Q=0.406. Since the Q value is less than the preset threshold T=1.2, it is determined to be of the "mineral carbon fixation pathway explicit type," indicating that under this process condition, the carbon fixation reaction of steel slag is mainly contributed by mineral phases such as dicalcium silicate and tricalcium silicate.

[0037] This application provides a device for quantitative tracing and carbon fixation pathway classification and evaluation of the carbon fixation contribution of steel slag. (See also...) Figure 2 The evaluation device 2 includes, Data acquisition module 201 is used to acquire the measured carbon content and total free calcium content of steel slag before and after carbonization. The quantitative traceability module 202 is used to calculate the total carbon fixation rate of steel slag based on the carbon content of steel slag before and after carbonization; to calculate the carbon fixation contribution rate of free total calcium component based on the free total calcium content and total carbon fixation rate of steel slag before and after carbonization; and to calculate the carbon fixation contribution rate of mineral component based on the carbon fixation contribution rate of free total calcium component. The carbon fixation pathway classification and evaluation module 203 is used to calculate the carbon fixation contribution ratio based on the carbon fixation contribution rate of free total calcium components and the carbon fixation contribution rate of mineral components, and to classify and evaluate the carbon fixation pathways based on the carbon fixation contribution ratio.

[0038] In one embodiment provided in this application, the data acquisition module 201 is further used to acquire information such as the preset threshold for carbon fixation contribution ratio, steel slag type, particle size, and carbonization process parameters. The data acquisition includes acquiring data that is manually input or automatically imported by the detection equipment.

[0039] In one embodiment provided in this application, the carbon fixation pathway classification and evaluation module 203 is further configured to generate an analysis report for display and / or storage based on the calculation results. The analysis report includes pie charts or bar charts showing the contribution rates of each component; When there are multiple types of steel slag, the analysis report includes a comparison view generated based on multiple data. This view presents four indicators for each type of steel slag object in a parallel chart format: total carbon fixation rate of steel slag, carbon fixation contribution rate of free total calcium components, carbon fixation contribution rate of mineral components, and carbon fixation contribution ratio. The slag can be sorted according to at least one of the indicators.

[0040] The above multidimensional comparative evaluation follows the following rules: when the total carbon fixation rate of steel slag of different types... When the values ​​are similar, they are sorted according to the carbon fixation contribution ratio Q. The smaller the carbon fixation contribution ratio Q, the higher the ranking.

[0041] In one embodiment provided in this application, the quantitative traceability module 202 is further used to perform data verification before calculation: verifying the rationality of the input measurement data; if any data exceeds the preset theoretical reasonable range or the logical relationship is invalid, such as the carbon content ω of the steel slag after carbonization... C2 <Carbon content of steel slag before carbonization ω C1 Or the total free calcium content ω of steel slag after carbonization f2 >Total free calcium content in steel slag before carbonization ω f1 The system will automatically issue an alarm and prompt for a re-inspection.

[0042] In one embodiment provided in this application, the preset threshold T supports recommendations based on historical detection data statistics. The specific recommendation logic is as follows: the data acquisition module retrieves historical data that is consistent with the current steel slag type, particle size, and carbonization process parameters from its archived storage, statistically analyzes the distribution range of the carbon fixation contribution ratio Q value in this type of historical data, and uses the median of the historical carbon fixation contribution ratio Q range as a basis, combined with the current detection data, to make fine adjustments and generate 1 to 2 recommended thresholds for the user to choose from, and the recommended thresholds are always within the preset value range of 0.8 to 3.0.

[0043] Figure 3 This is a schematic diagram of the structure of the electronic device 3 shown in the embodiments of this application.

[0044] See Figure 3 The electronic device 3 includes a memory 301 and a processor 302.

[0045] Electronic device 3 includes a memory 301 and a processor 302; The memory 301 is connected to the processor 302 and is used to store programs; Processor 302 is used to implement some or all of the methods described above by running programs stored in memory 301.

[0046] Specifically, the aforementioned electronic device 3 may further include: a bus, a communication interface 303, an input device 304, and an output device 305.

[0047] The processor 302, memory 301, communication interface 303, input device 304, and output device 305 are interconnected via a bus. Among them: A bus can include a pathway for transmitting information between various components of a computer system.

[0048] Processor 302 can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0049] Processor 302 may include a main processor, as well as a baseband chip, modem, etc.

[0050] Memory 301 may include various types of storage units, such as system memory, read-only memory (ROM), and permanent storage devices. ROM may store static data or instructions required by processor 302 or other modules of the computer. Permanent storage devices may be read-write storage devices. Permanent storage devices may be non-volatile storage devices that retain stored instructions and data even when the computer is powered off. In some embodiments, permanent storage devices use mass storage devices (e.g., magnetic or optical disks, flash memory) as permanent storage devices. In other embodiments, permanent storage devices may be removable storage devices (e.g., floppy disks, optical drives). System memory may be a read-write storage device or a volatile read-write storage device, such as dynamic random access memory. System memory may store some or all of the instructions and data required by the processor during operation. Furthermore, memory 301 may include any combination of computer-readable storage media, including various types of semiconductor memory chips (e.g., DRAM, SRAM, SDRAM, flash memory, programmable read-only memory), and disks and / or optical disks may also be used. In some embodiments, memory 301 may include a removable storage device that is readable and / or writable, such as a laser disc (CD), a read-only digital multifunction optical disc (e.g., DVD-ROM, dual-layer DVD-ROM), a read-only Blu-ray disc, an ultra-high density optical disc, a flash memory card (e.g., SD card, mini SD card, Micro-SD card, etc.), a magnetic floppy disk, etc. Computer-readable storage media do not contain carrier waves or transient electronic signals transmitted wirelessly or via wired connections.

[0051] Input device 304 may include a device for receiving user input data and information, such as a keyboard, mouse, camera, scanner, light pen, voice input device, touch screen, pedometer, or gravity sensor.

[0052] Output device 305 may include devices that allow information to be output to a user, such as a display screen, printer, speaker, etc.

[0053] The communication interface 303 may include a device that uses any transceiver to communicate with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), etc.

[0054] The processor 302 executes the program stored in the memory 301 and calls other devices, which can be used to implement some or all of the methods described above.

[0055] Furthermore, the method according to this application can also be implemented as a computer program product, which includes computer program code instructions for performing some or all of the steps in the method described above. Optionally, the computer program can be stored on a readable storage medium of a computer device or in the cloud; the processor of the computer device reads the computer program from the readable storage medium or the cloud.

[0056] Computer program products can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of this application. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0057] The aforementioned computer program product can be implemented through hardware, software, or a combination thereof. In one optional embodiment, the computer program product is specifically embodied in a computer storage medium; in another optional embodiment, the computer program product is specifically embodied in a software product, such as a software development kit (SDK), etc.

[0058] Alternatively, this application may be implemented as a computer-readable storage medium (or a non-transitory machine-readable storage medium or a machine-readable storage medium) storing executable code (or computer program or computer instruction code) that, when executed by a processor of an electronic device (or server, etc.), causes the processor to perform part or all of the steps of the methods described above according to this application.

[0059] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may, for example, include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0060] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method for quantitatively tracing the contribution of steel slag to carbon sequestration and classifying carbon sequestration pathways, characterized in that, include: S1. Steel slag composition determination: Determine the carbon content and total free calcium content of steel slag before and after carbonization; S2. Quantitative traceability of carbon fixation contribution of each component of steel slag: The total carbon fixation rate of steel slag is calculated based on the carbon content of steel slag before and after carbonization; the carbon fixation contribution rate of free total calcium component is calculated based on the free total calcium content and the total carbon fixation rate of steel slag before and after carbonization; the carbon fixation contribution rate of mineral components is calculated based on the carbon fixation contribution rate of free total calcium component; the free total calcium content is the combined amount of free calcium oxide and calcium hydroxide calculated as calcium oxide (CaO), and the mineral components are all carbon-fixing mineral phases other than free calcium oxide and calcium hydroxide; The total carbon fixation rate of steel slag is calculated using the following formula. : Where: ω C2 —Carbon content of steel slag after carbonization, % ω C1 — Carbon content of steel slag before carbonization, % 12 — Relative atomic mass of C; 44 — Relative molecular mass of CO2; The carbon fixation contribution rate of the free total calcium component is calculated using the following formula. : Where: ω f2 —Total free calcium content in steel slag after carbonization, % ω f1 —Total free calcium content in steel slag before carbonization, % —Total carbon fixation rate of steel slag, % 56—Relative molecular mass of CaO; 44 — Relative molecular mass of CO2; The carbon sequestration contribution rate of mineral components is calculated using the following formula. : in: —Contribution of free total calcium to carbon fixation, % S3. Classification and evaluation of carbon fixation pathways: Calculate the carbon fixation contribution ratio based on the carbon fixation contribution rate of free total calcium and the carbon fixation contribution rate of mineral components, and classify and evaluate carbon fixation pathways based on the carbon fixation contribution ratio; The free total calcium-mineral carbon fixation contribution ratio was calculated using the following formula. calculate: in: —Contribution of free total calcium to carbon fixation, % —Contribution of carbon sequestration by mineral components, % The carbon fixation contribution ratio With preset threshold Comparison: when ≥ At that time, it was determined to be "dominantly free calcium carbon fixation pathway"; when < At that time, it was determined to be "mineral carbon fixation pathway manifestation type".

2. The evaluation method for quantitative tracing and classification of carbon sequestration pathways of steel slag as described in claim 1, characterized in that, The determination of the carbon content and total free calcium content of steel slag before and after carbonization includes: determining the carbon content of steel slag before and after carbonization using a carbon-sulfur analyzer, and determining the total free calcium content of steel slag before and after carbonization using ethylene glycol-EDTA titration.

3. The evaluation method for quantitative tracing and classification of carbon sequestration contribution of steel slag as described in claim 2, characterized in that, The carbon content of steel slag was determined using a carbon-sulfur analyzer in the range of 0.2% to 30.0%. Tungsten particles and pure iron were used as fluxes during the determination process. The amount of tungsten particles added was 1.0g to 2.0g, and the amount of pure iron added was 0.1g to 0.6g. The analytical gas was high-purity oxygen with a purity of ≥99.5%, and the input pressure was controlled at 0.18MPa±5%. The flow rate of the analytical gas was controlled at 3 to 4.5L / min, and the analysis time was 40 to 60s.

4. The evaluation method for quantitative tracing and classification of carbon sequestration pathways of steel slag as described in claim 2, characterized in that, When determining the free total calcium content using the ethylene glycol-EDTA titration method, the leaching process is carried out in a water bath shaker at a temperature of 70–90℃, a shaking speed of 300–600 r / min, and a leaching time of 15–30 min. A calcium indicator is prepared by grinding calcium carboxylic acid and potassium nitrate at a mass ratio of 1:40–60 to indicate the titration endpoint. For samples with a free total calcium content of <0.5% in steel slag, the sample weight is appropriately increased to 1–2 g to ensure that the volume of EDTA standard solution consumed in the titration is not less than 5 mL.

5. A device for quantitatively tracing the contribution of steel slag to carbon sequestration and classifying and evaluating carbon sequestration pathways, characterized in that, include, The data acquisition module is used to acquire the measured carbon content and total free calcium content of steel slag before and after carbonization. The quantitative traceability module is used to calculate the total carbon fixation rate of steel slag based on the carbon content of steel slag before and after carbonization; to calculate the carbon fixation contribution rate of free total calcium component based on the free total calcium content and the total carbon fixation rate of steel slag before and after carbonization; and to calculate the carbon fixation contribution rate of mineral components based on the carbon fixation contribution rate of free total calcium component. The free total calcium content is the combined amount of free calcium oxide and calcium hydroxide, calculated as calcium oxide (CaO), and the mineral components are all carbon-fixing mineral phases other than free calcium oxide and calcium hydroxide. The total carbon fixation rate of steel slag is calculated using the following formula. : Where: ω C2 —Carbon content of steel slag after carbonization, % ω C1 — Carbon content of steel slag before carbonization, % 12 — Relative atomic mass of C; 44 — Relative molecular mass of CO2; The carbon fixation contribution rate of the free total calcium component is calculated using the following formula. : Where: ω f2 —Total free calcium content in steel slag after carbonization, % ω f1 —Total free calcium content in steel slag before carbonization, % —Total carbon fixation rate of steel slag, % 56—Relative molecular mass of CaO; 44 — Relative molecular mass of CO2; The carbon sequestration contribution rate of mineral components is calculated using the following formula. : in: —Contribution of free total calcium to carbon fixation, % The carbon fixation pathway classification and evaluation module calculates the carbon fixation contribution ratio based on the carbon fixation contribution rates of free total calcium and mineral components, and classifies and evaluates carbon fixation pathways based on this contribution ratio. The free total calcium-mineral carbon fixation contribution ratio is calculated using the following formula. calculate: in: —Contribution of free total calcium to carbon fixation, % —Contribution of carbon sequestration by mineral components, % The carbon fixation contribution ratio With preset threshold Comparison: when ≥ At that time, it was determined to be "dominantly free calcium carbon fixation pathway"; when < At that time, it was determined to be "mineral carbon fixation pathway manifestation type".

6. The device for quantitative tracing and carbon fixation pathway classification and evaluation of the carbon fixation contribution of steel slag as described in claim 5, characterized in that, The data acquisition module is also used to acquire information such as the preset threshold for carbon fixation contribution ratio, steel slag type, particle size, and carbonization process parameters. The data acquisition includes acquiring data that is manually input or automatically imported by the detection equipment.

7. The device for quantitative tracing and classification assessment of carbon sequestration contribution of steel slag as described in claim 5, characterized in that, The carbon sequestration pathway classification and evaluation module is also used to generate an analysis report for display and / or storage based on the calculation results. The analysis report includes pie charts or bar charts showing the contribution rates of each component; When there are multiple types of steel slag, the analysis report includes a comparison view generated based on multiple data. This view presents four indicators for each type of steel slag object in a parallel chart format: total carbon fixation rate of steel slag, carbon fixation contribution rate of free total calcium components, carbon fixation contribution rate of mineral components, and carbon fixation contribution ratio. The slag can be sorted according to at least one of the indicators.

8. The device for quantitative tracing and classification assessment of carbon sequestration contribution of steel slag as described in claim 5, characterized in that, The quantitative traceability module is also used to perform data verification before calculation: it verifies the rationality of the input measurement data, and when any data exceeds the preset theoretical reasonable range or the logical relationship is not valid, the system automatically alarms and prompts for re-examination.

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