Method for co-accounting carbon emissions of alumina and metal gallium production

Abstract

Provided is a method for co-accounting carbon emissions of aluminum oxide and metal gallium production, comprising the following steps: for a process of producing mother liquor in a separation washing step before calcination in a Bayer process of aluminum oxide production and producing the metal gallium from the mother liquor, taking the separation washing and the previous process as a preceding process and taking the process after the separation washing as a subsequent process, collecting energy consumption, power consumption, raw material emission coefficient, raw material usage, aluminum oxide yield and gallium yield of the preceding process and the subsequent process, calculating carbon emissions of the preceding process; calculating carbon emissions of aluminum oxide and metal gallium in the preceding process; accounting carbon emissions of aluminum oxide and metal gallium in the subsequent process; according to carbon emissions of aluminum oxide and metal gallium in the preceding process and the subsequent process respectively, accounting final carbon emissions of aluminum oxide and final carbon emissions of metal gallium. Carbon emissions of metal gallium are accounted, and the accuracy of carbon emissions of aluminum oxide is improved.

Description

Technical Field

[0001] This invention relates to the field of carbon emission measurement, and more particularly to a method and apparatus for co-measuring carbon emissions from the production of alumina and metallic gallium. Background Technology

[0002] Gallium, an important rare element, is present in extremely low concentrations in the Earth's crust. Metallic gallium is often found as an associated element in other minerals. In recent years, with the rapid development of science and technology in my country, gallium, as a key raw material for semiconductors, has become increasingly important to the development of my country's semiconductor industry, and its demand is constantly increasing. Gallium is mainly obtained as a byproduct of aluminum extraction from bauxite or zinc extraction from zinc ore, with a small amount also recovered from gallium as a byproduct in coal. Currently, over 90% of the world's primary gallium is extracted from the mother liquor used in alumina production.

[0003] In alumina production, gallium is mainly introduced into the process from bauxite and coal powder. A portion of the gallium enters the circulating mother liquor, while the remainder is lost with the product, waste red mud and its washing liquid, scale, and dust. Although extracting metallic gallium from the mother liquor is currently the mainstream method for primary gallium production, gallium is not considered a byproduct in current carbon emission measurement of alumina production, regardless of whether the alumina plant has a gallium production line. It is not included in the alumina production process. However, since gallium can be extracted from the seed mother liquor of alumina, and the seed mother liquor containing gallium is not discarded after alumina production but is further used to produce gallium, the currently obtained carbon emission figures for alumina are inaccurate, and there is a lack of methods for measuring carbon emissions of metallic gallium.

[0004] Therefore, it is necessary to study a method and apparatus for co-measuring carbon emissions from alumina and metallic gallium production to solve one or more of the aforementioned technical problems. Summary of the Invention

[0005] To address at least one of the aforementioned technical problems, according to one aspect of the present invention, a method for co-measuring carbon emissions from the production of alumina and metallic gallium is provided, characterized by comprising the following steps:

[0006] Step 1: For the Bayer process of alumina production, the separation and washing step before calcination generates mother liquor and produces gallium from the mother liquor. The separation and washing step and the preceding step are considered as the preceding step and the step after separation and washing is considered as the following step. The energy consumption, electricity consumption, raw material emission coefficient, raw material usage, alumina production and gallium production of the preceding and following steps are collected, and the carbon emissions of the preceding step are calculated.

[0007] CE per =∑ i (f i ×E i)+e×E e +∑ j (m j ×E j (1)

[0008] Among them, CE per : Carbon emissions from upstream processes; i: Energy category; e: Electricity consumption of upstream processes; j: Upstream raw material category; f i Energy consumption of the preceding process i; E i : i. Carbon emission factor of energy; E e Carbon emission factor of electricity consumption; m j The consumption of raw materials of type j in the preceding process; E j Carbon emission factors of raw materials of type j;

[0009] Step 2: Based on the real-time unit price of alumina Real-time unit price of gallium P Ga Alumina production and gallium production M Ga Calculate the carbon emissions of alumina in the preceding process. Carbon emissions (CE) of gallium metal in preceding processes Per-Ga ;

[0010]

[0011]

[0012]

[0013] F allocation Indicates the allocation coefficient;

[0014] Step 3: Measure the carbon emissions of alumina and metallic gallium in subsequent processes;

[0015]

[0016] CE Post-Ga =pte j ×E e +∑ j (ptm j ×E j (6)

[0017] This indicates the carbon emissions from alumina production in subsequent processes, expressed in ptf. i CE represents the energy consumption of i in the subsequent process. p This indicates direct carbon emissions from subsequent processes, pte j This indicates the electricity consumption in subsequent processes, expressed in ptm. jE represents the consumption of type j raw materials in subsequent processes; e E represents the carbon emission factor of electricity consumption. j Indicates the carbon emission factor of raw material type j;

[0018] Step 4: Measure the final carbon emissions of alumina and gallium based on their respective carbon emissions in the preceding and subsequent processes.

[0019]

[0020]

[0021] This indicates the final carbon emissions of alumina, CE. Ga This indicates the final carbon emissions of metallic gallium.

[0022] According to another aspect of the present invention, an Internet of Things-based monitoring and analysis system is used to collect data on energy consumption, electricity consumption, raw material emission coefficients, raw material usage, alumina production, and gallium production in the preceding and following processes.

[0023] According to another aspect of the present invention, a carbon emission co-metering system for the production of alumina and metallic gallium is also provided, characterized in that it includes:

[0024] The first module is used for the process of producing mother liquor and producing gallium metal from the separation and washing step before calcination in the Bayer process of alumina production. The separation and washing step and the preceding step are regarded as the preceding step and the step after separation and washing step is regarded as the following step. The energy consumption, electricity consumption, raw material emission coefficient, raw material usage, alumina production and gallium production of the preceding and following steps are collected, and the carbon emissions of the preceding step are calculated.

[0025] CE per =∑ i (f i ×E i )+e×E e +∑ j (m j ×E j (1)

[0026] Among them, CE per : Carbon emissions from upstream processes; i: Energy category; e: Electricity consumption of upstream processes; j: Upstream raw material category; f i Energy consumption of the preceding process i; E i : i. Carbon emission factor of energy; E e Carbon emission factor of electricity consumption; m j The consumption of raw materials of type j in the preceding process; Ej Carbon emission factors of raw materials of type j;

[0027] The second module is used for real-time unit price based on alumina. Real-time unit price of gallium P Ga Alumina production and gallium production M Ga Calculate the carbon emissions of alumina in the preceding process. Carbon emissions (CE) of gallium metal in preceding processes Per-Ga ;

[0028]

[0029]

[0030]

[0031] F allocation Indicates the allocation coefficient;

[0032] The third module is used to measure the carbon emissions of alumina and gallium in subsequent processes.

[0033]

[0034] CE Post-Ga =pte j ×E e +∑ j (ptm j ×E j (6)

[0035] This indicates the carbon emissions from alumina production in subsequent processes, expressed in ptf. i CE represents the energy consumption of i in the subsequent process. p This indicates direct carbon emissions from subsequent processes, pte j This indicates the electricity consumption in subsequent processes, expressed in ptm. j E represents the consumption of type j raw materials in subsequent processes; e E represents the carbon emission factor of electricity consumption. j Indicates the carbon emission factor of raw material type j;

[0036] The first module is used to measure the final carbon emissions of alumina and gallium based on the carbon emissions of alumina and gallium in the preceding and subsequent processes, respectively.

[0037]

[0038]

[0039] This indicates the final carbon emissions of alumina, CE. Ga This indicates the final carbon emissions of metallic gallium.

[0040] This invention can achieve one or more of the following technical effects:

[0041] 1. This invention combines the Bayer process for alumina production and the process for producing metallic gallium. Based on real-time production parameters and real-time unit price, a metallic gallium carbon emission measurement model is established, which can achieve accurate measurement of metallic gallium carbon emissions.

[0042] 2. Based on the gallium carbon emission measurement model, this invention further improves the accuracy of existing alumina carbon emission measurement, overcomes the problem of inaccurate alumina carbon emission measurement results caused by the fact that gallium is not considered as a byproduct in the existing technology, and improves the reliability and scientific nature of related carbon emission measurement. Attached Figure Description

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0044] Figure 1 This is a schematic diagram illustrating the technical principle of a method for co-measuring carbon emissions from the production of alumina and metallic gallium according to a preferred embodiment of the present invention.

[0045] Figure 2 This is a schematic diagram of the IoT monitoring, analysis, and acquisition system used in a preferred embodiment of the present invention for the co-measurement of carbon emissions from alumina and gallium production.

[0046] Figure 3 Examples of relevant parameters collected by the IoT monitoring and analysis system, including energy consumption, electricity consumption, raw material emission coefficients, raw material usage, and alumina and gallium production in the preceding and following processes. Detailed Implementation

[0047] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings. These specific embodiments are intended to illustrate the present invention in detail, but should not be construed as limiting the present invention. Various modifications and variations can be made without departing from the spirit and scope of the present invention, and all of these should be included within the protection scope of the present invention.

[0048] Example 1

[0049] According to a preferred embodiment of the present invention, see Figure 1-3 A method for co-measuring carbon emissions from the production of alumina and metallic gallium is provided, characterized by the following steps:

[0050] Step 1: For the Bayer process of alumina production, the separation and washing step before calcination generates mother liquor and produces gallium from the mother liquor. The separation and washing step and the preceding step are considered as the preceding step and the step after separation and washing is considered as the following step. The energy consumption, electricity consumption, raw material emission coefficient, raw material usage, alumina production and gallium production of the preceding and following steps are collected, and the carbon emissions of the preceding step are calculated.

[0051] CE per =∑ i (f i ×E i )+e×E e +∑ j (m j ×E j (1)

[0052] Among them, CE per : Carbon emissions from upstream processes; i: Energy category; e: Electricity consumption of upstream processes; j: Upstream raw material category; f i Energy consumption of the preceding process i; E i : i. Carbon emission factor of energy; E e Carbon emission factor of electricity consumption; m j The consumption of raw materials of type j in the preceding process; E j Carbon emission factors of raw materials of type j;

[0053] Step 2: Based on the real-time unit price of alumina Real-time unit price of gallium P Ga Alumina production and gallium production M Ga Calculate the carbon emissions of alumina in the preceding process. Carbon emissions (CE) of gallium metal in preceding processes Per-Ga ;

[0054]

[0055]

[0056]

[0057] F allocation Indicates the allocation coefficient;

[0058] Step 3: Measure the carbon emissions of alumina and metallic gallium in subsequent processes;

[0059]

[0060] CE Post-Ga =pte j ×Ee +∑ j (ptm j ×E j (6)

[0061] This indicates the carbon emissions from alumina production in subsequent processes, expressed in ptf. i CE represents the energy consumption of i in the subsequent process. p This indicates direct carbon emissions from subsequent processes, pte j This indicates the electricity consumption in subsequent processes, expressed in ptm. j E represents the consumption of type j raw materials in subsequent processes; e E represents the carbon emission factor of electricity consumption. j Indicates the carbon emission factor of raw material type j;

[0062] Step 4: Measure the final carbon emissions of alumina and gallium based on their respective carbon emissions in the preceding and subsequent processes.

[0063]

[0064]

[0065] This indicates the final carbon emissions of alumina, CE. Ga This indicates the final carbon emissions of metallic gallium.

[0066] According to another preferred embodiment of the present invention, an Internet of Things-based monitoring and analysis system is used to collect data on energy consumption, electricity consumption, raw material emission coefficients, raw material usage, alumina production, and gallium production in the preceding and following processes.

[0067] According to another preferred embodiment of the present invention, a carbon emission co-metering system for the production of alumina and metallic gallium is also provided, characterized in that it includes:

[0068] The first module is used for the process of producing mother liquor and producing gallium metal from the separation and washing step before calcination in the Bayer process of alumina production. The separation and washing step and the preceding step are regarded as the preceding step and the step after separation and washing step is regarded as the following step. The energy consumption, electricity consumption, raw material emission coefficient, raw material usage, alumina production and gallium production of the preceding and following steps are collected, and the carbon emissions of the preceding step are calculated.

[0069] CE per =∑ i (f i ×E i )+e×E e +∑ j(m j ×E j (1)

[0070] Among them, CE per : Carbon emissions from upstream processes; i: Energy category; e: Electricity consumption of upstream processes; j: Upstream raw material category; f i Energy consumption of the preceding process i; E i : i. Carbon emission factor of energy; E e Carbon emission factor of electricity consumption; m j The consumption of raw materials of type j in the preceding process; E j Carbon emission factors of raw materials of type j;

[0071] The second module is used for real-time unit price based on alumina. Real-time unit price of gallium P Ga Alumina production and gallium production M Ga Calculate the carbon emissions of alumina in the preceding process. Carbon emissions (CE) of gallium metal in preceding processes Per-Ga ;

[0072]

[0073]

[0074]

[0075] F allocation Indicates the allocation coefficient;

[0076] The third module is used to measure the carbon emissions of alumina and gallium in subsequent processes.

[0077]

[0078] CE Post-Ga =pte j ×E e +∑ j (ptm j ×E j (6)

[0079] This indicates the carbon emissions from alumina production in subsequent processes, expressed in ptfi. i CE represents the energy consumption of i in the subsequent process. p This indicates direct carbon emissions from subsequent processes, pte j This indicates the electricity consumption in subsequent processes, expressed in ptm. j E represents the consumption of type j raw materials in subsequent processes; eE represents the carbon emission factor of electricity consumption. j Indicates the carbon emission factor of raw material type j;

[0080] The first module is used to measure the final carbon emissions of alumina and gallium based on the carbon emissions of alumina and gallium in the preceding and subsequent processes, respectively.

[0081]

[0082]

[0083] This indicates the final carbon emissions of alumina, CE. Ga This indicates the final carbon emissions of metallic gallium.

[0084] According to another preferred embodiment of the present invention, the present invention also provides a computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program adapted to be loaded and executed by a processor, so as to cause a computer device having the processor to perform the aforementioned method for co-measuring carbon emissions from the production of alumina and metallic gallium.

[0085] The present invention also provides a computer device, characterized in that it includes: a processor and a memory; the processor is connected to the memory, wherein the memory is used to store a computer program, and the processor is used to invoke the computer program to cause the computer device to execute the steps of the aforementioned method for co-measuring carbon emissions from the production of alumina and gallium. It is worth noting that the process by which the processor of the present invention executes the computer program is consistent with the execution process of each step in the method for co-measuring carbon emissions from the production of alumina and gallium provided by the present invention, as detailed in the foregoing description.

[0086] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as ROM / RAM, disk, optical disk, etc.

[0087] Example 2

[0088] According to a preferred embodiment of the present invention, a carbon emission co-measurement system for alumina and gallium production is provided. Based on the Internet of Things (IoT), it enables component analysis and carbon emission measurement during the actual production process. The system mainly includes a measurement system and an IoT monitoring, analysis, and acquisition system. The measurement system integrates a co-measurement method for carbon emissions from alumina and gallium production. The IoT monitoring, analysis, and acquisition system includes various sensing components, and each system module requires the support of processors, memory, and other components.

[0089] Preferably, see Figure 2 The IoT monitoring, analysis, and data acquisition system includes a data sensing unit and a data acquisition unit. The data sensing unit and the data acquisition unit are unidirectionally connected, and the data acquisition unit is unidirectionally connected to the metering system. The data sensing unit is used to sense relevant production parameters during the production process based on various sensing devices. The data acquisition unit is used to collect and monitor relevant production parameters in real time during the production process.

[0090] Preferably, the data sensing unit includes:

[0091] The perception and classification module is used to classify and process various parameter inputs during the aluminum plate production process, including material energy consumption, energy parameters, electricity consumption, carbon emissions, and grid coefficients.

[0092] Sensor modules, including but not limited to IoT sensors based on RFID, QR code, or Bluetooth, are used for real-time data sensing of material input, energy input, energy grade, power consumption, and grid coefficients in various unit processes, such as melting, casting, and rolling.

[0093] The data interface module is used to adapt and access different types of data. The data is processed by feature extraction to identify the data format and interaction method, and then adapted to the corresponding interaction interface.

[0094] The data transmission module is used to transmit data from the data interface to the data receiving module of the data acquisition unit.

[0095] Preferably, the data acquisition unit includes:

[0096] The data receiving module is used to interact with the data transmission module and receive various types of collected data transmitted by the data transmission module;

[0097] The channel allocation module is used to allocate acquisition channels to different data ports based on acquisition tasks, ensuring the balanced and distributed operation of the acquisition cluster.

[0098] The data storage module is used to classify and store structured and unstructured data according to whether it is real-time or non-real-time data.

[0099] The input terminal of the output display module is connected to the output terminal of the data storage module, and the output terminal is connected to an external display device. After the data storage is completed, it is used to display the measurement results.

[0100] Preferably, the metering system is used to perform metering processing on the data from the data sensing unit, and includes a sampling module, a metering analysis module, a data storage module, and a real-time feedback module.

[0101] Preferably, the input signal of the sampling module is connected to the output of the data storage module of the data acquisition unit and the output of the data storage module of the control system, for receiving data from the material network monitoring and acquisition system. The input signal of the metering and analysis module is connected to the output signal of the sampling module to realize the metering processing of the data from the sampling module.

[0102] Preferably, the input signal of the data storage module is connected to the output signal of the metrology analysis module for real-time classification and storage of metrology and analysis results. The input of the output display module is connected to the output signal of the data storage module, and the output is connected to an external display device to display the metrology results after the metrology analysis is completed.

[0103] Example 3

[0104] According to a preferred embodiment of the present invention, in the Bayer process for producing gallium metal from the mother liquor generated by the separation and washing step before calcination in the alumina production process, the separation and washing step and the preceding step are regarded as the preceding step and the step after separation and washing is regarded as the following step.

[0105] Preferably, a method for co-measuring carbon emissions from the production of alumina and metallic gallium is provided, comprising the following steps:

[0106] Step 1: Utilize an IoT-based monitoring, analysis, and data acquisition system to collect data on energy consumption, electricity consumption, raw material emission coefficients, raw material usage, and alumina and gallium production in preceding and subsequent processes. Relevant parameters include... Figure 3 .

[0107] Step 2: Measure the carbon emissions of the preceding processes based on Formula 1.

[0108]

[0109] Step 3: Based on economic value, the unit price of alumina and gallium and their respective production volumes, the carbon emissions obtained from the preceding steps of alumina and gallium are measured using Formula 2-4.

[0110] Real-time prices for alumina and gallium are as follows:

[0111] Alumina: 2.90 yuan / kg, Gallium: 2025 yuan / kg

[0112]

[0113]

[0114]

[0115] Step 4: Based on formulas 5-6, and according to the results of energy consumption, electricity consumption, raw material emission coefficient, and raw material usage, measure the carbon emissions of the subsequent production process of alumina and metallic gallium.

[0116]

[0117]

[0118] Step 5: Based on Formulas 7-8, and the results of Steps 3 and 4, measure the carbon emissions of alumina and metallic gallium.

[0119]

[0120] CE Ga =CE Per-Ga +CE Post-Ga =10.32+101=111.32kgCO2eq / t

[0121] Based on the above steps, a carbon emission measurement model for gallium metal was established, which can accurately measure the carbon emissions of gallium metal, while improving the reliability and scientific rigor of carbon emission measurement for alumina.

[0122] This invention can achieve one or more of the following technical effects:

[0123] 1. This invention combines the Bayer process for alumina production and the process for producing metallic gallium. Based on real-time production parameters and real-time unit price, a metallic gallium carbon emission measurement model is established, which can achieve accurate measurement of metallic gallium carbon emissions.

[0124] 2. Based on the gallium carbon emission measurement model, this invention further improves the accuracy of existing alumina carbon emission measurement, overcomes the problem of inaccurate alumina carbon emission measurement results caused by the fact that gallium is not considered as a byproduct in the existing technology, and improves the reliability and scientific nature of related carbon emission measurement.

[0125] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for co-measuring carbon emissions from the production of alumina and metallic gallium, characterized in that... For the Bayer process of alumina production, which involves the separation and washing step before calcination to generate mother liquor and then producing gallium from that mother liquor, the separation and washing process and the preceding steps are considered as pre-processes, and the process after separation and washing is considered as a post-process. Different methods are used to measure the carbon emissions of alumina and gallium in the pre-process and post-process, respectively, including the following steps: Step 1: Collect energy consumption, electricity consumption, raw material emission coefficient, raw material usage, alumina production, and gallium production data for the preceding and subsequent processes, and calculate the carbon emissions of the preceding processes. （1） in, Carbon emissions from preceding processes; Energy category; Electricity consumption of preceding processes; Upstream raw material categories; Preceding processes Energy consumption; : Carbon emission factors of energy; Carbon emission factors of electricity consumption; Preceding processes Consumption of similar raw materials; : Carbon emission factors of raw materials; Step 2: Based on the real-time unit price of alumina Real-time unit price of gallium Alumina production and gallium production Calculate the carbon emissions of alumina in the preceding process. And carbon emissions of gallium in the preceding process ; （2） （3） （4） Indicates the allocation coefficient; Step 3: Measure the carbon emissions of alumina and metallic gallium in subsequent processes; （5） （6） This indicates the carbon emissions from alumina production in subsequent processes. Indicating subsequent processes Energy consumption This indicates direct carbon emissions from subsequent processes. This indicates the amount of electricity consumed in subsequent processes. Indicating subsequent processes Consumption of similar raw materials; Carbon emission factor representing electricity consumption; express Carbon emission factors of raw materials; Step 4: Measure the final carbon emissions of alumina and gallium based on their respective carbon emissions in the preceding and subsequent processes. （7） （8） This indicates the final carbon emissions of alumina. This indicates the final carbon emissions of metallic gallium.

2. The method for co-measuring carbon emissions from alumina and gallium production according to claim 1, characterized in that... The system uses an IoT-based monitoring and analysis system to collect data on energy consumption, electricity consumption, raw material emission coefficients, raw material usage, alumina production, and gallium production in the preceding and following processes.

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