A method for testing the current efficiency of aluminum electrolysis and related equipment

Abstract

The present application discloses a method for testing the current efficiency of aluminum electrolysis and related equipment, which relates to the technical field of aluminum electrolysis and can improve the testing accuracy of the current efficiency of aluminum electrolysis. The method for testing the current efficiency of aluminum electrolysis includes: detecting the gas volume fractions of CO2, CO, N2, O2 and rare gases in the aluminum electrolytic cell; and calculating the current efficiency of aluminum electrolysis according to the gas volume fractions of CO2, CO, N2, O2 and rare gases in the aluminum electrolytic cell.

Description

Technical Field

[0001] This application relates to the technical field of aluminum electrolysis, and particularly relates to a method for testing the current efficiency of aluminum electrolysis and related equipment. Background Art

[0002] The current efficiency of aluminum electrolysis is an important economic and technical index in aluminum electrolysis production and an important basis for an enterprise to adjust process parameters. The existing method for testing the current efficiency of aluminum electrolysis by gas analysis is based on the relationship between the CO2 concentration in the anode gas and the current efficiency. By collecting the gas escaping during the electrolysis process and analyzing the gas concentration, the current efficiency at a certain moment can be obtained.

[0003] However, using the existing gas analysis method is prone to being affected by the aluminum electrolysis production process, equipment, or environment during on-site testing, resulting in a low accuracy of the test results. Summary of the Invention

[0004] The embodiments of this application provide a method for testing the current efficiency of aluminum electrolysis and related equipment, which can improve the test accuracy of the current efficiency of aluminum electrolysis.

[0005] In the first aspect of the embodiments of this application, a method for testing the current efficiency of aluminum electrolysis is provided, including:

[0006] Detecting the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolysis cell;

[0007] Calculating the current efficiency of aluminum electrolysis according to the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolysis cell.

[0008] In some embodiments, before calculating the current efficiency of aluminum electrolysis according to the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolysis cell, it further includes:

[0009] Detecting the gas volume fractions of N2, O2, and rare gases in the atmospheric environment;

[0010] The calculating the current efficiency of aluminum electrolysis according to the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolysis cell includes:

[0011] Calculating the current efficiency of aluminum electrolysis according to the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolysis cell and the gas volume fractions of N2, O2, and rare gases in the atmospheric environment.

[0012] In some embodiments, calculating the aluminum electrolysis current efficiency based on the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolysis cell and the gas volume fractions of N2, O2, and rare gases in the atmospheric environment includes:

[0013] Calculating the aluminum electrolysis current efficiency according to the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolysis cell and the gas volume fractions of N2, O2, and rare gases in the atmospheric environment according to the following formula:

[0014] η = (%CO2) / {(%CO2)+(%CO)-2[(%O 2空白 )×[(%N2)+(%G 稀有 )] / [(%N 2空白 )+(%G 稀有空白 )]-(%O2)]} / 2 + 50% + m,

[0015] where η is the aluminum electrolysis current efficiency, m is the correction coefficient, %CO2 is the gas volume fraction of CO2 in the aluminum electrolysis cell, %CO is the gas volume fraction of CO in the aluminum electrolysis cell, %O2 is the gas volume fraction of O2 in the aluminum electrolysis cell, %N2 is the gas volume fraction of N2 in the aluminum electrolysis cell, %G 稀有 is the gas volume fraction of rare gases in the aluminum electrolysis cell, %N 2空白 is the gas volume fraction of N2 in the atmospheric environment, %O 2空白 is the gas volume fraction of O2 in the atmospheric environment, %G 稀有空白 is the gas volume fraction of rare gases in the atmospheric environment.

[0016] In some embodiments, before detecting the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolysis cell, it further includes:

[0017] Collecting the gas at the sampling hole of the aluminum electrolysis cell to obtain a sampled gas;

[0018] The detecting the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolysis cell includes:

[0019] Detecting the gas volume fractions of CO2, CO, N2, O2, and rare gases in the sampled gas.

[0020] In some embodiments, the number of the sampling holes of each aluminum electrolysis cell is greater than or equal to 2;

[0021] The collecting the gas at the sampling hole of the aluminum electrolysis cell to obtain a sampled gas includes:

[0022] Within a first set time period, gases at the collection holes of the aluminum electrolytic cell are collected at a first set frequency to obtain corresponding sampled gases, where the number of times of gas collection at each collection hole is greater than or equal to 3 times.

[0023] In some embodiments, detecting the volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolytic cell includes:

[0024] Within a second set time period, at a second set frequency, the average values of the volume fractions of CO2, CO, N2, O2, and rare gases within a third set time period are detected at the detection ports of the aluminum electrolytic cell, where the third set time period is less than the second set time period, and the number of detections at each detection port is greater than or equal to 3 times.

[0025] In some embodiments, the aluminum electrolysis current efficiency testing method further includes:

[0026] Calculating the average value of multiple aluminum electrolysis current efficiencies to obtain the average current efficiency.

[0027] In a second aspect of the embodiments of the present application, there is provided an aluminum electrolysis current efficiency testing device, including:

[0028] A detection module for detecting the volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolytic cell;

[0029] An operation module for calculating the aluminum electrolysis current efficiency according to the volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolytic cell.

[0030] In a third aspect of the embodiments of the present application, there is provided an electronic device, including:

[0031] A memory in which a computer program is stored;

[0032] A processor for implementing the aluminum electrolysis current efficiency testing method as described in the first aspect when executing the computer program.

[0033] In a fourth aspect of the embodiments of the present application, there is provided a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the aluminum electrolysis current efficiency testing method as described in the first aspect.

[0034] The aluminum electrolysis current efficiency testing method and related equipment provided by the embodiments of the present application detect the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolytic cell, take into account the gas volume fractions of N2, O2, and rare gases in the air, and calculate the aluminum electrolysis current efficiency according to the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolytic cell. For the detection of N2, O2, and rare gases, it is possible to avoid the influence of the mixing of air components on the gas volume fraction of CO2, and the detection of CO can avoid the influence of the reaction between C and O2 or C and CO on the concentration of CO2, avoiding the problem that the existing methods are affected by the fire eye, process, etc., resulting in significantly lower test results, and thus being able to improve the test accuracy of the aluminum electrolysis current efficiency. Description of the Drawings

[0035] Figure 1 It is a schematic flow chart of an aluminum electrolysis current efficiency testing method provided by the embodiments of the present application;

[0036] Figure 2 It is a schematic structural block diagram of an aluminum electrolysis current efficiency testing device provided by the embodiments of the present application;

[0037] Figure 3 It is a schematic structural block diagram of an electronic device provided by the embodiments of the present application;

[0038] Figure 4 It is a schematic structural block diagram of a computer-readable storage medium provided by the embodiments of the present application. Detailed Embodiments

[0039] In order to better understand the technical solutions provided by the embodiments of the present specification, the technical solutions of the embodiments of the present specification will be described in detail below through the drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present specification and the embodiments are detailed descriptions of the technical solutions of the embodiments of the present specification, rather than limitations on the technical solutions of the present specification. Without conflict, the technical features in the embodiments of the present specification and the embodiments can be combined with each other.

[0040] In this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element. The term "more than two" includes two or more than two cases.

[0041] In the first aspect of the embodiments of the present application, a method for testing the current efficiency of aluminum electrolysis is provided. Figure 1 It is a schematic flowchart of a method for testing the current efficiency of aluminum electrolysis provided by the embodiments of the present application. As Figure 1 shown, the method for testing the current efficiency of aluminum electrolysis provided by the embodiments of the present application includes:

[0042] S100: Detect the gas volume fractions of CO2, CO, N2, O2 and rare gases in the aluminum electrolysis cell. It should be noted that the gas volume fractions of CO2, CO, N2, O2 and rare gases in the aluminum electrolysis cell refer to the volume ratio of CO2 in the total volume of CO2, CO, N2, O2 and rare gases, the volume ratio of CO in the total volume of CO2, CO, N2, O2 and rare gases, the volume ratio of N2 in the total volume of CO2, CO, N2, O2 and rare gases, the volume ratio of O2 in the total volume of CO2, CO, N2, O2 and rare gases, and the volume ratio of rare gases in the total volume of CO2, CO, N2, O2 and rare gases, which can be expressed as a percentage, and the present application does not make specific limitations.

[0043] S200: Calculate the aluminum electrolysis current efficiency according to the gas volume fractions of CO2, CO, N2, O2 and rare gases in the aluminum electrolysis cell. The aluminum electrolysis current efficiency can be calculated based on the relationship between the concentration of CO2 in the aluminum electrolysis cell and the aluminum electrolysis current efficiency, according to the concentration of CO2.

[0044] At present, the current efficiency of aluminum electrolysis is an important economic and technical index in aluminum electrolysis production and an important basis for enterprises to adjust process parameters. The commonly used methods for measuring the current efficiency of aluminum electrolysis include the inventory method, the regression method, and the anode gas analysis method, etc. The inventory method is simple and suitable for long-term inventory. The inventory period is more than 9 months, and the error is within 1%. The error of the current efficiency can be within 1%. This method is affected by many factors such as the cell lining, the area of molten aluminum in the cathode, the height of the aluminum level, the bottom sediment in the furnace, and the tapping deviation. The inventory period is relatively long, and the value of the current efficiency is closely related to the value of the current intensity. The regression method can be used to measure the current efficiency in the short term with relatively high accuracy. This method requires selecting a suitable tracer element and has high requirements for the addition amount of the tracer element, and the molten aluminum cannot be contaminated. The value of the current efficiency is closely related to the value of the current intensity. The anode gas analysis method is fast and can efficiently reflect the change of the current efficiency, which has nothing to do with the value of the current intensity, but it will be affected by the flame hole, process, etc. In the prior art, the principle of the gas analysis method is based on the relationship between the CO2 concentration in the anode gas and the current efficiency. By collecting the gas escaping during the electrolysis process and analyzing the gas concentration, the current efficiency at a certain moment can be obtained. The test results can quickly reflect the change of the current efficiency of the electrolytic cell within a certain period of time, which helps to comprehensively understand the working condition of the electrolytic cell. When the state of the electrolytic cell is adjusted artificially, the change state of the electrolytic cell can be accurately and quickly understood, providing reliable judgment data for improving the process and even the management state. It has a guiding role in daily process operations and provides strong technical support for optimizing the electrolytic cell process and operating procedures. However, during the on-site test process, the test results are affected by the flame hole, process, etc. Especially for the overheated electrolytic cell, the test results are significantly lower. Analyzing the reasons, it is found that when the electrolytic cell is overheated, the cavity under the cell shell is relatively large, the flame hole opening is large, and when the molten aluminum in the electrolytic cell fluctuates, the air in the electrolytic cell is likely to flow into the cavity under the cell shell and even react with the carbon in the electrolytic cell, affecting the volume fraction of the gas and resulting in a lower current efficiency. At high temperatures, reactions will also occur between CO2, CO, O2, and C, causing changes in the anode gas composition, or the air composition enters the aluminum electrolytic cell, and both the gas composition and the gas fraction in the aluminum electrolytic cell will change, thus affecting the measurement and calculation of the current efficiency.

[0045] In view of the problems existing in the prior art, the aluminum electrolysis current efficiency testing method provided by the embodiments of the present application calculates the aluminum electrolysis current efficiency by detecting the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolytic cell, taking into account the gas volume fractions of N2, O2, and rare gases in the air. For the detection of N2, O2, and rare gases, it is possible to avoid the influence of the mixing of air components on the gas volume fraction of CO2, and the detection of CO can avoid the influence of the reaction of C with O2 or C with CO on the concentration of CO2, avoiding the problem that the existing methods are affected by the fire eye, process, etc., resulting in significantly low test results, and thus being able to improve the test accuracy of the aluminum electrolysis current efficiency.

[0046] In some embodiments, before step S200, it further includes:

[0047] Detect the gas volume fractions of N2, O2, and rare gases in the atmospheric environment. Due to the influence of the process, equipment, or environment, air is likely to enter the aluminum electrolytic cell during the test, affecting the gas components and gas volume fractions. Therefore, it is possible to test N2, O2, and rare gases in the atmospheric environment.

[0048] Step S200 includes:

[0049] Calculate the aluminum electrolysis current efficiency according to the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolytic cell and the gas volume fractions of N2, O2, and rare gases in the atmospheric environment. Adding the gas volume fractions of N2, O2, and rare gases in the atmospheric environment to the calculation can further improve the test accuracy of the aluminum electrolysis current efficiency.

[0050] Exemplarily, according to the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolytic cell and the gas volume fractions of N2, O2, and rare gases in the atmospheric environment, the aluminum electrolysis current efficiency is calculated according to the following formula:

[0051] η = (%CO2) / {(%CO2)+(%CO)-2[(%O 2空白 )×[(%N2)+(%G 稀有 )] / [(%N 2空白 )+(%G 稀有空白 )]-(%O2)]} / 2 + 50% + m,

[0052] where η is the aluminum electrolysis current efficiency, m is the correction coefficient, %CO2 is the gas volume fraction of CO2 in the aluminum electrolytic cell, %CO is the gas volume fraction of CO in the aluminum electrolytic cell, %O2 is the gas volume fraction of O2 in the aluminum electrolytic cell, %N2 is the gas volume fraction of N2 in the aluminum electrolytic cell, %G稀有 is the gas volume fraction of rare gases in the aluminum electrolysis cell, %N 2空白 is the gas volume fraction of N2 in the ambient atmosphere, %O 2空白 is the gas volume fraction of O2 in the ambient atmosphere, %G 稀有空白 is the gas volume fraction of rare gases in the ambient atmosphere. It should be noted that each parameter in the above formula can participate in the calculation in the form of a percentage, and the embodiments of the present application do not make specific limitations. m, as a correction coefficient, can be set according to the performance, process characteristics, and environmental characteristics of specific aluminum electrolysis equipment, and the embodiments of the present application do not make specific limitations.

[0053] In the aluminum electrolysis current efficiency test method provided by the embodiments of the present application, compared with the prior art that only calculates the aluminum electrolysis current efficiency using the gas volume fraction of CO2 in the total of CO2 and CO, the embodiments of the present application use the gas volume fractions of CO, N2, O2, and rare gases in the aluminum electrolysis cell and the gas volume fractions of N2, O2, and rare gases in the ambient atmosphere as parameters in the calculation formula, and the calculated aluminum electrolysis current efficiency is closer to the actual value, that is, the test accuracy of the aluminum electrolysis current efficiency is higher.

[0054] In some embodiments, the detection accuracy of the gas volume fractions of CO, N2, O2, and rare gases in the aluminum electrolysis cell and the gas volume fractions of N2, O2, and rare gases in the ambient atmosphere can be not less than 0.1% to further ensure the test accuracy of the aluminum electrolysis current efficiency.

[0055] In some embodiments, before step S100, it further includes:

[0056] Collect the gas at the sampling hole of the aluminum electrolysis cell to obtain the sampling gas. After determining the electrolysis cell to be measured, a circular hole can be chiseled on the electrolyte crust surface, and the size of the hole is equivalent to the collection port of the flue gas sampler. Place the collection port of the flue gas sampler above the center of the sampling hole, 20 mm to 50 mm away from the electrolyte liquid level. The collection hole of the flue gas sampler is surrounded by the anode gas, and keep the collection port of the flue gas sampler stable to obtain the anode gas, and the sampling gas is the collected anode gas.

[0057] Step S100 includes:

[0058] Detect the gas volume fractions of CO2, CO, N2, O2, and rare gases in the sampling gas.

[0059] The aluminum electrolysis current efficiency testing method provided by the embodiments of the present application first collects the anode gas in the aluminum electrolytic cell, puts the sampled gas into the corresponding detection device for detecting the gas components and volume fractions. Each sampled gas collected from a single sampling hole corresponds to a value of the aluminum electrolysis current efficiency, and multiple repeated tests can be performed. By detecting the sampling points corresponding to different sampling holes, values of the aluminum electrolysis current efficiency at different times and different sampling points can be obtained for the analysis and monitoring of the aluminum electrolysis process.

[0060] In some embodiments, the number of sampling holes in each aluminum electrolytic cell is greater than or equal to 2, and the sampling holes can be opened according to specific sampling requirements, which are not specifically limited in the embodiments of the present application.

[0061] Collecting the gas at the sampling hole of the aluminum electrolytic cell to obtain the sampled gas includes:

[0062] Within a first set time period, collecting the gas at the sampling hole of the aluminum electrolytic cell at a first set frequency to obtain the corresponding sampled gas, wherein the number of times of collecting gas at each sampling hole is greater than or equal to 3 times.

[0063] Exemplarily, the gas volume fraction can be measured in an intermittent manner. The current efficiency of each electrolytic cell is tested for at least 3 consecutive days, that is, the first set time period is 3 days; two tests are performed every day, that is, the first set frequency is 2 times / day, and the interval between two adjacent tests is not less than 4 hours. The number of sampling points for each test is not less than 2, that is, the number of sampling holes for collecting gas each time is greater than or equal to 2, which can be set according to the specific number of sampling holes, and the number of times of collecting gas at each sampling hole is greater than or equal to 3 times. The current efficiency of the electrolytic cell can be the average value of all the values of the aluminum electrolysis current efficiency obtained within 3 days, and the aluminum electrolysis current efficiency for calculating the average value is the value of the aluminum electrolysis current efficiency obtained under the same equipment, process conditions, etc.

[0064] The aluminum electrolysis current efficiency testing method provided by the embodiments of the present application tests the gas volume fractions of various gas components by sampling first and then testing, which is used to calculate the aluminum electrolysis current efficiency, realizes an intermittent detection mode, and the average value of all the calculated values can obtain a relatively accurate aluminum electrolysis current efficiency.

[0065] In some embodiments, step S100 may include:

[0066] Within a second set time period, at a second set frequency, the average values of the volume fractions of CO2, CO, N2, O2, and rare gases at the detection ports of the aluminum electrolysis cell within a third set time period are detected, where the third set time period is less than the second set time period, and the number of detections at each detection port is greater than or equal to 3 times. It should be noted that the detection ports mentioned in the embodiments of this application can be the sampling holes mentioned in the above embodiments, or the detection ports are set larger than the sampling holes, which are mainly set according to the size of the detection equipment, and the embodiments of this application do not make specific limitations.

[0067] Exemplarily, the volume fraction of the gas can be measured in a continuous manner, and the single measurement time is not less than 10 min, that is, the third set time period is 10 min. A real-time measurement device is used, and at least 3 consecutive days of current efficiency tests are carried out for each electrolysis cell, that is, the second set time period is 3 days, and two tests are carried out every day, and the second set frequency is 2 times / day, and the interval between the two tests is not less than 4 hours. The number of sampling points for each test is not less than 2, and the gas is sampled not less than 3 times at each sampling point. Without gas sampling, the measurement device is directly set at the position of the detection port for implementation measurement. Each test can last for 10 min, and the average value of the tests within 10 min is used as the output value of this test. The average value of all the output values obtained from the tests within 3 days is taken to obtain the average current efficiency value.

[0068] The aluminum electrolysis current efficiency test method provided by the embodiments of this application does not require gas sampling and can directly test, and can obtain the aluminum electrolysis current efficiency more accurately.

[0069] Exemplarily, in Example 1, %N 2空白 = 78.1%, %O 2空白 = 20.9%, % G稀有空白 = 1.0%. The volume fraction of the gas is measured in a continuous manner, and the test results are shown in Table 1. Table 1 shows the test data of Example 1 and Comparative Example 1. The comparative example is the existing test method for the aluminum electrolysis current efficiency.

[0070]

[0071] Table 1

[0072] Exemplarily, in Example 2, %N 2空白 = 78.1%, %O 2空白 = 20.9%, % G稀有空白 = 1.0%. The volume fraction of the gas is measured in an intermittent manner, and the test results are shown in Table 2. Table 2 shows the test data of Example 2 and Comparative Example 2. The comparative example is the existing test method for the aluminum electrolysis current efficiency.

[0073]

[0074] Table 2

[0075] Exemplarily, Example 3, %N 2空白 = 78.1%, %O 2空白 = 20.9%, % G稀有空白 = 1.0%. The gas volume fraction is measured in a continuous manner. The test results are shown in Table 3. Table 3 shows the test data of Example 3 and Comparative Example 3. The comparative example is the test method of the existing aluminum electrolysis current efficiency.

[0076]

[0077] Table 3

[0078] Exemplarily, Example 4, %N 2空白 = 78.1%, %O 2空白 = 20.9%, % G稀有空白 = 1.0%. The gas volume fraction is measured in an intermittent manner. The test results are shown in Table 4. Table 4 shows the test data of Example 4 and Comparative Example 4. The comparative example is the test method of the existing aluminum electrolysis current efficiency.

[0079]

[0080] Table 4

[0081] Exemplarily, Example 5, %N 2空白 = 78.1%, %O 2空白 = 20.9%, % G稀有空白 = 1.0%. The gas volume fraction is measured in a continuous manner. The test results are shown in Table 5. Table 5 shows the test data of Example 5 and Comparative Example 5. The comparative example is the test method of the existing aluminum electrolysis current efficiency.

[0082]

[0083] Table 5

[0084] In Examples 1, 3, and 4, the test electrolytic cells were found to be relatively hot, with a large cavity under the cell shell surface, large openings in the fire holes, large fluctuations in the aluminum liquid in the electrolytic cell, and air flowing into the area under the cell shell surface in the electrolytic cell, which affected the gas volume fraction and resulted in a low current efficiency. The embodiments of the present application provide a method for measuring the aluminum electrolysis current efficiency with high accuracy, avoiding the problem that the test results of the existing method are significantly lower due to the influence of fire holes, processes, and reactions caused by air flowing into the area under the cell shell surface in the electrolytic cell.

[0085] In some embodiments, the method for testing the aluminum electrolysis current efficiency provided by the embodiments of the present application further includes:

[0086] Calculate the average value of multiple aluminum electrolysis current efficiencies to obtain the average current efficiency. The multiple aluminum electrolysis current efficiencies can be obtained by sampling first and then testing, or by direct testing, which can further improve the testing accuracy of the aluminum electrolysis current efficiency.

[0087] In the second aspect of the embodiments of the present application, a device for testing the aluminum electrolysis current efficiency is provided. Figure 2 It is a schematic structural block diagram of a device for testing the aluminum electrolysis current efficiency provided by the embodiments of the present application. As Figure 2 shown, a device for testing the aluminum electrolysis current efficiency provided by the embodiments of the present application includes:

[0088] A detection module 300 for detecting the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolysis cell.

[0089] An operation module 400 for calculating the aluminum electrolysis current efficiency according to the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolysis cell.

[0090] The device for testing the aluminum electrolysis current efficiency provided by the embodiments of the present application detects the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolysis cell, takes into account the gas volume fractions of N2, O2, and rare gases in the air, and calculates the aluminum electrolysis current efficiency according to the gas volume fractions of CO2, CO, N2, O2, and rare gases in the aluminum electrolysis cell. For the detection of N2, O2, and rare gases, it can avoid the influence of the mixing of air components on the gas volume fraction of CO2, and testing CO can avoid the influence of the reaction of C with O2 or C with CO on the concentration of CO2, avoiding the problem that the existing methods are affected by the fire eye, process, etc., resulting in significantly low test results, and thus can improve the testing accuracy of the aluminum electrolysis current efficiency.

[0091] In the third aspect of the embodiments of the present application, an electronic device is provided. Figure 3 It is a schematic structural block diagram of an electronic device provided by the embodiments of the present application. As Figure 3 shown, the electronic device provided by the embodiments of the present application includes:

[0092] A memory 500 in which a computer program is stored;

[0093] A processor 600, and the processor 600 is used to implement the method for testing the aluminum electrolysis current efficiency as described in the first aspect when executing the computer program.

[0094] In the fourth aspect of the embodiments of the present application, a computer-readable storage medium is provided. Figure 4 It is a schematic structural block diagram of a computer-readable storage medium provided by the embodiments of the present application. As Figure 4As shown, a computer program 710 is stored on the computer-readable storage medium 700. When the computer program 710 is executed by a processor, it implements the aluminum electrolysis current efficiency test method described in the first aspect.

[0095] It should be noted that in the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0096] Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-readable storage media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) containing computer-readable program codes.

[0097] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0098] These computer program instructions can also be stored in a computer-readable memory capable of guiding a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured product including an instruction device, and the instruction device implements the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0099] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0100] An embodiment of the present application also provides a computer program product, which includes computer software instructions. When the computer software instructions run on a processing device, the processing device is caused to execute the process of the aluminum electrolysis current efficiency test method.

[0101] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are fully or partially generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from a website, a computer, a server, or a data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or a wireless manner (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be stored by a computer or a data storage device such as a server or a data center that integrates one or more available media. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)), etc.

[0102] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0103] In several embodiments provided by the present application, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is only a logical function division, and there can be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be indirect couplings or communication connections through some interfaces, devices, or units, and can be in electrical, mechanical, or other forms.

[0104] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place, or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0105] In addition, each functional unit in various embodiments of the present application may be integrated into one processing unit, may exist physically alone for each unit, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software functional units.

[0106] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in various embodiments of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0107] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of various embodiments of the present application.

[0108] Although the preferred embodiments of this specification have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted to include the preferred embodiments as well as all changes and modifications that fall within the scope of this specification.

[0109] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalent technologies, this specification is also intended to include these modifications and variations.

Claims

1. A method for testing the current efficiency of aluminum electrolysis, characterized in that, Comprising: Detecting the gas volume fractions of CO2, CO, N2, O2 and rare gases in an aluminum electrolysis cell; Calculating the aluminum electrolysis current efficiency according to the gas volume fractions of CO2, CO, N2, O2 and rare gases in the aluminum electrolysis cell; Detecting the gas volume fractions of N2, O2 and rare gases in the atmospheric environment; Calculating the aluminum electrolysis current efficiency according to the gas volume fractions of CO2, CO, N2, O2 and rare gases in the aluminum electrolysis cell and the gas volume fractions of N2, O2 and rare gases in the atmospheric environment according to the following formula: η = (%CO2) / {(%CO2) + (%CO) - 2[(%O 2空白 )×[(%N2) + (%G 稀有 )] / [(%N 2空白 ) + (%G 稀有空白 )] - (%O2)]} / 2 + 50% + m, Among them, η is the current efficiency of aluminum electrolysis, m is the correction coefficient, %CO2 is the gas volume fraction of CO2 in the aluminum electrolysis cell, %CO is the gas volume fraction of CO in the aluminum electrolysis cell, %O2 is the gas volume fraction of O2 in the aluminum electrolysis cell, %N2 is the gas volume fraction of N2 in the aluminum electrolysis cell, %G 稀有 is the gas volume fraction of rare gases in the aluminum electrolysis cell, %N 2空白 is the gas volume fraction of N2 in the atmospheric environment, %O 2空白 is the gas volume fraction of O2 in the atmospheric environment, %G 稀有空白 is the gas volume fraction of rare gases in the atmospheric environment.

2. The method for testing the current efficiency of aluminum electrolysis according to claim 1, characterized in that, Before detecting the gas volume fractions of CO2, CO, N2, O2 and rare gases in the aluminum electrolysis cell, it further includes: Collecting the gas at the sampling hole of the aluminum electrolysis cell to obtain a sampled gas; The detecting the gas volume fractions of CO2, CO, N2, O2 and rare gases in the aluminum electrolysis cell includes: Detecting the gas volume fractions of CO2, CO, N2, O2 and rare gases in the sampled gas.

3. The method for testing the current efficiency of aluminum electrolysis according to claim 2, characterized in that, The number of the sampling holes of each aluminum electrolysis cell is greater than or equal to 2; The collecting the gas at the sampling hole of the aluminum electrolysis cell to obtain a sampled gas includes: Within a first set time period, collecting the gas at the sampling hole of the aluminum electrolysis cell at a first set frequency to obtain the corresponding sampled gas, wherein the number of times of collecting gas for each sampling hole is greater than or equal to 3 times.

4. The method for testing the current efficiency of aluminum electrolysis according to claim 1, characterized in that, The detecting the gas volume fractions of CO2, CO, N2, O2 and rare gases in the aluminum electrolysis cell includes: Within a second set time period, at a second set frequency, detecting the average values of the gas volume fractions of CO2, CO, N2, O2 and rare gases within a third set time period at the detection port of the aluminum electrolysis cell, wherein the third set time period is less than the second set time period, and the number of detections for each detection port is greater than or equal to 3 times.

5. The method for testing the current efficiency of aluminum electrolysis according to claim 1, characterized in that, It further includes: Calculating the average value of the aluminum electrolysis current efficiencies of multiple ones to obtain a current efficiency mean value.

6. A device for testing the current efficiency of aluminum electrolysis, characterized in that, Comprising: A detection module for detecting the gas volume fractions of CO2, CO, N2, O2 and rare gases in an aluminum electrolysis cell; An operation module for calculating the aluminum electrolysis current efficiency according to the gas volume fractions of CO2, CO, N2, O2 and rare gases in the aluminum electrolysis cell; Detecting the gas volume fractions of N2, O2 and rare gases in the atmospheric environment; Calculating the aluminum electrolysis current efficiency according to the gas volume fractions of CO2, CO, N2, O2 and rare gases in the aluminum electrolysis cell and the gas volume fractions of N2, O2 and rare gases in the atmospheric environment according to the following formula: η = (%CO2) / {(%CO2) + (%CO) - 2[(%O 2空白 )×[(%N2) + (%G 稀有 )] / [(%N 2空白 ) + (%G 稀有空白 )] - (%O2)]} / 2 + 50% + m, Among them, η is the current efficiency of aluminum electrolysis, m is the correction coefficient, %CO2 is the gas volume fraction of CO2 in the aluminum electrolysis cell, %CO is the gas volume fraction of CO in the aluminum electrolysis cell, %O2 is the gas volume fraction of O2 in the aluminum electrolysis cell, %N2 is the gas volume fraction of N2 in the aluminum electrolysis cell, %G 稀有 is the gas volume fraction of rare gases in the aluminum electrolysis cell, %N 2空白 is the gas volume fraction of N2 in the atmospheric environment, %O 2空白 is the gas volume fraction of O2 in the atmospheric environment, %G 稀有空白 is the gas volume fraction of rare gases in the atmospheric environment.

7. An electronic device, characterized in that, Comprising: A memory in which a computer program is stored; A processor for implementing the aluminum electrolysis current efficiency test method as described in any one of claims 1 - 5 when executing the computer program.

8. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, it implements the aluminum electrolysis current efficiency test method as described in any one of claims 1 - 5.

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