Common-stroke zoned on-demand feeding control method for industrial aluminum electrolytic cell

Abstract

A common-stroke zoned on-demand feeding control method for an industrial aluminum electrolytic cell, relating to the technical field of industrial aluminum electrolytic cells. The method comprises: on the basis of a cell resistance-alumina concentration relationship curve, determining a cell parameter upper limit and a cell parameter lower limit; acquiring a cell voltage and a series current, and a zone anode current of each zone in an industrial aluminum electrolytic cell, and then determining a zone parameter upper limit and a zone parameter lower limit of each zone in the industrial aluminum electrolytic cell; and on the basis of the cell voltage, the series current, a plurality of zone anode currents, a plurality of zone parameter upper limits and a plurality of zone parameter lower limits, performing common-stroke zoned on-demand feeding control on the industrial aluminum electrolytic cell. By performing common-stroke zoned on-demand feeding control on an industrial aluminum electrolytic cell, the rationality of feeding control for the industrial aluminum electrolytic cell is improved.

Description

A method for controlling on-demand feeding in a co-stroke zone of an industrial aluminum electrolytic cell

[0001] This application claims priority to Chinese Patent Application No. 202410917036.X, filed on July 10, 2024, entitled "A Method for Controlling Co-flow Regional On-Demand Feeding in an Industrial Aluminum Electrolytic Cell", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of industrial aluminum electrolysis cell technology, and in particular to a method for controlling the on-demand feeding of materials in a co-flow zone of an industrial aluminum electrolysis cell. Background Technology

[0003] In the production process of industrial aluminum electrolysis, raw alumina is dissolved in a cryolite-based electrolyte melt. Under the action of direct current, oxygen ions lose electrons and are reduced to oxygen atoms, which then react with the carbon anode to produce carbon dioxide, which is emitted into the atmosphere. Aluminum ions gain electrons at the cathode and are reduced to elemental metal products. In aluminum electrolysis production, electrolysis current efficiency and cell voltage are two of the most important technical and economic indicators, which directly determine the energy consumption and cost of electrolysis production. Current production processes mainly use large prebaked electrolysis cells with a capacity of 200kA to 600kA, with the number of anodes ranging from 24 to a maximum of 56, arranged in two rows on both sides A and B of the electrolysis cell. Alumina is added to the electrolytic cell using a point-to-center feeding method. The number of feeders increases with the increase of the series current. Generally, one feeder is set for every 8 anodes. The feeding port is located at the geometric center of 4 anodes on each side of A and B, which naturally divides the electrolytic cell into multiple areas centered on the feeders, as shown in Figures 1 and 2. Each feeder in the area indicated by the dashed line supplies alumina to about 8 anodes in its area.

[0004] Electrolytic aluminum uses alumina as raw material, so the feeding of alumina is the most important control point in the aluminum electrolytic cell production process. Because aluminum electrolytic cells operate in environments with high temperature, strong magnetic fields, and highly corrosive media, information such as alumina concentration and temperature has long been unavailable for real-time acquisition, except for the continuous and accurate acquisition of series current and cell voltage. Therefore, the alumina feeding operation relies on the cell resistance change calculated from the cell voltage and series current for control. The principle is illustrated in Figure 3, which shows the cell resistance-alumina concentration relationship curve; in Figure 3, the horizontal axis represents alumina concentration, and the vertical axis represents cell resistance. Figure 3 shows that the cell resistance R is affected by the anode-cathode distance ACD and the alumina concentration. The cell resistance increases with increasing cathode distance. At a certain cathode distance, the cell resistance R exhibits a U-shaped change with increasing alumina concentration: at lower alumina concentrations, the cell resistance decreases rapidly with increasing alumina concentration, reaching its lowest value around 3.5%; above this concentration, the cell resistance increases almost linearly and slowly with increasing alumina concentration. Industrial practice shows that within the range of 1.5% to 3.5%, i.e., the first concentration C in Figure 3, d Second concentration C u The indicated concentration range exhibits the highest electrolysis efficiency and, as seen in the cell resistance-alumina concentration curve, the most sensitive resistance-concentration response characteristics. The alumina concentration is below the first concentration C. d If the concentration of alumina is higher than the second concentration C, the anodic effect is more likely to occur; u If the alumina does not dissolve completely, it is easy for precipitation to form. Both of these situations will reduce the electrolysis efficiency.

[0005] Given the continuous consumption of the anode and the fluctuation of the molten aluminum at the cathode during the production process, the electrode distance cannot be accurately obtained. Therefore, it is impossible to obtain a curve model that uniquely corresponds to the alumina concentration based on the resistance for strict and precise control of the alumina concentration. The current control scheme uses an underfeeding (UF) and overfeeding (OF) strategy based on the RC curve to control the alumina concentration at a specified [C]. d C u [Range range]. Underfeeding refers to adding less alumina each time than the theoretically required amount for the series current, causing the alumina concentration in the electrolyte to decrease progressively, resulting in a higher resistance (in the direction indicated by arrow UF in Figure 3). Overfeeding refers to adding more alumina each time than the theoretically required amount for the series current, causing the alumina concentration in the electrolyte to increase progressively, resulting in a lower resistance (in the direction indicated by arrow OF in Figure 3). To ensure the alumina concentration is at least not lower than C... d The maximum value shall not exceed C u Correspondingly, the electrolyte resistance must be controlled to not exceed the upper limit R of the tank resistance. u The minimum value shall not exceed the lower limit of the slot resistance R.d The implementation strategy involves controlling the resistance based on factors such as R and the slope of the resistance change over time, dR / dt. In practice, starting from the under-feed stroke, the slot resistance R gradually increases along the UF direction until it reaches the upper limit of the slot resistance R. u When the overfeed stroke is switched, the slot resistance R will gradually decrease along the OF direction. When the lower limit R of the slot resistance is reached... d Then, it switches to the underfeed stroke and performs cyclic control, resulting in the slot resistance-time fluctuation curve shown in Figure 4. In Figure 4, the horizontal axis represents time, and the vertical axis represents the real-time slot resistance. In Figure 4, it is clear that the process of gradually increasing resistance is caused by the underfeed UF stroke, while the process of gradually decreasing slot resistance corresponds to the overfeed OF stroke. The cycle of one UF-OF fluctuation is generally controlled between 1 hour and 2 hours.

[0006] During electrolytic production, the amount of alumina added by each feeder is not always exactly the same, especially since the current passing through the anode in the cell can vary significantly due to factors such as electrode switching operations, resulting in different amounts of alumina consumed. Although the overall alumina concentration can be controlled within a specified range by uniform feeding based on the resistance information of the entire cell, the overall cell resistance reflects the average situation of the electrolytic cell, and there are actually significant differences between different areas. For example, some areas may have higher alumina concentrations, while others may have lower concentrations. This uneven concentration distribution leads to sedimentation at the bottom of the cell in high-concentration areas and low-voltage anode effects in low-concentration areas. Therefore, the current efficiency of current large-scale electrolytic cells is generally around 90% to 92%. In particular, low-concentration local areas can experience long-term low-voltage anode effects and continuous emissions of perfluorocarbons. Improving the uniformity of alumina concentration in the electrolytic cell will significantly improve the current efficiency of electrolysis.

[0007] Various control methods have been explored in this field to further improve alumina feeding and enhance the uniformity of alumina concentration in electrolytic cells. However, due to the limited continuous online measurement information available for electrolytic cells, it has been impossible to provide information on alumina concentration variations in different regions, making it difficult to achieve ideal control results. By utilizing a saddle-shaped fiber optic ring, a precise measurement method for the anolyte current in different regions of the aluminum electrolytic cell has been implemented. The current information of a region can directly reflect the real-time alumina consumption in that region, thereby providing feedback on the region's resistance and alumina concentration, thus providing a basis for solving the problem of alumina concentration uniformity distribution in electrolytic cells.

[0008] Summary of the Invention

[0009] Based on this, the purpose of this invention is to provide a method for controlling the feeding of industrial aluminum electrolytic cells in a co-flow zone on demand, which can control the feeding of industrial aluminum electrolytic cells in a co-flow zone on demand, thereby improving the rationality of feeding control of industrial aluminum electrolytic cells.

[0010] To achieve the above objectives, the present invention provides a method for controlling the on-demand feeding of a co-stroke zone in an industrial aluminum electrolysis cell, the scheme of which is as follows:

[0011] A method for controlling on-demand feeding in a co-flow zone of an industrial aluminum electrolysis cell is provided, including:

[0012] Based on the cell resistance-alumina concentration relationship curve, determine the upper and lower limits of the cell parameters;

[0013] The cell voltage and series current are obtained, as well as the regional anode current of each region in the industrial aluminum electrolysis cell; the regions in the industrial aluminum electrolysis cell correspond one-to-one with the feed port, and the feed port is located at the geometric center of the corresponding region;

[0014] Based on the upper limit of the cell parameters, the lower limit of the cell parameters, the series currents, and the anode currents of the multiple regions, the upper limit of the region parameters and the lower limit of the region parameters for each region in the industrial aluminum electrolysis cell are determined.

[0015] Based on the cell voltage, the series current, the anode current of multiple regions, the upper limit of multiple region parameters, and the lower limit of multiple region parameters, the industrial aluminum electrolysis cell is subjected to co-flow regional on-demand feeding control.

[0016] Optionally, based on the cell resistance-alumina concentration relationship curve, the upper limit and lower limit of the cell parameters are determined, specifically including:

[0017] Based on the aforementioned cell resistance-alumina concentration relationship curve, determine the upper limit and lower limit of cell resistance;

[0018] The upper limit of the slot resistance is determined to be the upper limit of the slot parameters;

[0019] The lower limit of the slot resistance is determined to be the upper limit of the slot parameters.

[0020] Optionally, based on the upper limit of the cell parameters, the lower limit of the cell parameters, the series currents, and the anode currents of the multiple regions, the upper limit of the region parameters and the lower limit of the region parameters in the industrial aluminum electrolysis cell are determined, including:

[0021] Define any region within the industrial aluminum electrolysis cell as the current region;

[0022] The upper limit of the parameters for the current region is determined based on the upper limit of the tank parameters, the series current, the anode current of the current region, and the formula for the upper limit of the parameters for the first region.

[0023] The lower limit of the parameters for the current region is determined based on the lower limit of the tank parameters, the series current, the regional anode current of the current region, and the formula for the lower limit of the parameters for the first region.

[0024] Optionally, based on the cell voltage, the series current, the anode current of multiple regions, the upper limits of multiple region parameters, and the lower limits of multiple region parameters, the industrial aluminum electrolysis cell is subjected to co-stroke regional on-demand feeding control, including:

[0025] The real-time region resistance of each region is determined based on the tank voltage, the series current, and the multiple region anode currents; the region anode current is the sum of all electrode currents within the region.

[0026] When the industrial aluminum electrolytic cell is in the under-feeding stroke, it is determined whether there is an over-feeding conversion zone in the industrial aluminum electrolytic cell, and the first judgment result is obtained; the real-time zone resistance of the over-feeding conversion zone is greater than or equal to the upper limit of the corresponding zone parameter; under-feeding means that the alumina addition rate is less than the theoretical alumina consumption rate of the zone.

[0027] If the first judgment result is negative, return to the step "obtain the cell voltage and series current, and the regional anode current of each area in the industrial aluminum electrolysis cell";

[0028] If the first judgment result is yes, then the feeding method of all areas corresponding to the feeding ports in the industrial aluminum electrolysis cell will be updated to overfeeding, and an overfeeding conversion area fault warning will be issued.

[0029] When the industrial aluminum electrolytic cell is in the overfeeding stroke, it is determined whether there is an underfeeding conversion zone in the industrial aluminum electrolytic cell, and a second judgment result is obtained; the real-time zone resistance of the underfeeding conversion zone is less than or equal to the lower limit of the corresponding zone parameter; overfeeding means that the alumina addition rate is greater than the theoretical alumina consumption rate of the zone.

[0030] If the second judgment result is negative, return to the step "obtain the cell voltage and series current, and the regional anode current of each area in the industrial aluminum electrolysis cell";

[0031] If the second judgment result is yes, then the feeding method of all areas corresponding to the feeding ports in the industrial aluminum electrolysis cell will be updated to insufficient feeding, and an emergency warning for the insufficient feeding conversion area will be issued.

[0032] Optionally, the formula for the upper limit of the parameters in the first region is:

[0033] in, I represents the upper limit of the parameters of the first region corresponding to the j-th region. line For a series of currents, I j Let J be the anode current corresponding to the j-th region. This is the upper limit of the slot resistance;

[0034] The formula for the lower limit of the parameters in the first region is:

[0035] in, This is the lower limit of the parameters for the first region corresponding to the j-th region. This is the lower limit of the slot resistance.

[0036] The real-time region resistance is:

[0037] Among them, R j V represents the real-time area resistance of the j-th region; V represents the slot voltage, V ext For the constant term, take 1.65V. Optionally, the theoretical consumption rate of alumina in the region is:

[0038] in, This represents the theoretical rate of alumina consumption in the j-th region of the electrolytic cell; This indicates the theoretical rate of alumina consumption in the electrolytic cell.

[0039] Optionally, based on the cell resistance-alumina concentration relationship curve, the upper limit and lower limit of the cell parameters are determined, specifically including:

[0040] Based on the cell resistance-alumina concentration relationship curve and the cell resistance change rate formula, determine the cell resistance change rate curve;

[0041] Based on the aforementioned rate of change curve of tank resistance, determine the upper limit and lower limit of the rate of change of tank resistance;

[0042] The upper limit of the rate of change of tank resistance is determined to be the upper limit of the tank parameters;

[0043] The lower limit of the rate of change of tank resistance is determined to be the upper limit of the tank parameters.

[0044] Optionally, based on the upper limit of the cell parameters, the lower limit of the cell parameters, the series currents, and the anode currents of the multiple regions, the upper limit of the region parameters and the lower limit of the region parameters in the industrial aluminum electrolysis cell are determined, including:

[0045] Define any region within the industrial aluminum electrolysis cell as the current region;

[0046] The upper limit of the parameters for the current region is determined based on the upper limit of the tank parameters, the series current, the anode current of the current region, and the formula for the upper limit of the parameters for the second region.

[0047] The lower limit of the parameters for the current region is determined based on the lower limit of the tank parameters, the series current, the regional anode current of the current region, and the formula for the lower limit of the parameters for the second region.

[0048] Optionally, based on the cell voltage, the series current, the anode current of multiple regions, the upper limits of multiple region parameters, and the lower limits of multiple region parameters, the industrial aluminum electrolysis cell is subjected to co-stroke regional on-demand feeding control, including:

[0049] The real-time regional resistance change rate of each region is determined based on the tank voltage, the series current, and the multiple regional anode currents; the regional anode current is the sum of all electrode currents within the region.

[0050] When the industrial aluminum electrolytic cell is in the under-feeding stroke, it is determined whether there is an over-feeding conversion zone in the industrial aluminum electrolytic cell, and a third judgment result is obtained; the real-time regional resistance change rate of the over-feeding conversion zone is greater than or equal to the upper limit of the corresponding regional parameter.

[0051] If the third judgment result is negative, return to the step "obtain the cell voltage and series current, and the regional anode current of each area in the industrial aluminum electrolysis cell";

[0052] If the third judgment result is yes, then the feeding method of all areas corresponding to the feeding ports in the industrial aluminum electrolysis cell will be updated to overfeeding, and an overfeeding conversion area fault warning will be issued.

[0053] When the industrial aluminum electrolytic cell is in the overfeeding stroke, it is determined whether there is an underfeeding conversion zone in the industrial aluminum electrolytic cell, and a fourth judgment result is obtained; the real-time regional resistance change rate of the underfeeding conversion zone is less than or equal to the lower limit of the corresponding regional parameter.

[0054] If the fourth judgment result is negative, return to the step "obtain the cell voltage and series current, and the regional anode current of each area in the industrial aluminum electrolysis cell";

[0055] If the fourth judgment result is yes, then the feeding method of all areas corresponding to the feeding ports in the industrial aluminum electrolysis cell will be updated to insufficient feeding, and an insufficient feeding conversion area fault warning will be issued. In this application, both the insufficient feeding conversion area fault warning and the excessive feeding conversion area fault warning are warnings to remind staff to carry out maintenance. The data may show fault warnings, but there may not actually be a fault.

[0056] Optionally, the formula for the upper limit of the parameters in the second region is:

[0057] in, I represents the upper limit of the second region parameter corresponding to the j-th region. line For a series of currents, I j Let J be the anode current corresponding to the j-th region. This represents the upper limit of the rate of change of the tank resistance.

[0058] The formula for the lower limit of the parameters in the second region is:

[0059] in, This is the lower limit of the parameters for the second region corresponding to the j-th region. This is the lower limit of the rate of change of tank resistance;

[0060] The real-time regional resistance change rate is: p j =|dR j / dt|=|ΔR j | / Δt;

[0061] Where, p j R represents the real-time regional resistance change rate corresponding to the j-th region. j Let ΔR be the real-time region resistance of the j-th region. j Let be the change in regional resistance of the j-th region during the time interval Δt;

[0062] The real-time area resistance is:

[0063] Where V represents the slot voltage, V ext This is a constant term, taken as 1.65V.

[0064] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0065] This application provides a method for controlling the co-flow, zoned, on-demand feeding of industrial aluminum electrolytic cells. Based on the cell resistance-alumina concentration relationship curve, cell voltage and series current, and the zone anode current of each zone in the industrial aluminum electrolytic cell, the upper and lower limits of the zone parameters for each zone are determined. This enables co-flow, zoned, on-demand feeding control of the industrial aluminum electrolytic cell. The method employs a strategy of independent feeding in each zone within the same stroke and utilizing the zone current information to implement on-demand feeding, ensuring that the alumina concentration in each zone of the electrolytic cell remains within the target control range. This improves the uniformity of alumina concentration in the electrolytic cell, increases electrolytic production efficiency, and achieves green and energy-saving production of aluminum electrolytic cells, reducing costs and increasing efficiency.

[0066] Instruction manual illustrations

[0067] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0068] Figure 1 shows the anode layout of an electrolytic cell with 6 feed ports and 48 anodes in the prior art;

[0069] Figure 2 shows the anode layout of an electrolytic cell with 4 feed ports and 36 anodes in the prior art;

[0070] Figure 3 is a graph showing the relationship between cell resistance and alumina concentration, which is the basis for controlling alumina feeding in the prior art.

[0071] Figure 4 shows the actual change in slot resistance obtained by uniformly controlling the feeding according to the under-feeding stroke and the over-feeding stroke in the prior art;

[0072] Figure 5 is a flowchart of a co-flow, zoned, on-demand feeding control method for an industrial aluminum electrolytic cell according to an embodiment of this application;

[0073] Figure 6 is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0074] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0075] The purpose of this application is to provide a method for controlling the feeding of industrial aluminum electrolytic cells by dividing the co-flow area into zones on demand, thereby improving the rationality of feeding control in industrial aluminum electrolytic cells.

[0076] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0077] In an exemplary embodiment, as shown in FIG5, a method for controlling the co-flow, zoned, on-demand feeding of an industrial aluminum electrolysis cell is provided. This method is executed by a computer device, specifically a terminal or server, or both. In this embodiment, the method is specifically described, including steps 501 to 504. Wherein:

[0078] Step 501: Determine the upper limit and lower limit of the cell parameters based on the cell resistance-alumina concentration relationship curve.

[0079] Step 502: Obtain the cell voltage and series current, as well as the regional anode current of each region in the industrial aluminum electrolysis cell. Each region in the industrial aluminum electrolysis cell corresponds one-to-one with the feed port. The feed port is located at the geometric center of the corresponding region; with the alumina feed port on the electrolysis cell as the center, a feed port with m...T The electrolytic cell with one anode is divided into n relatively independent regions, the same number as the number of feed ports n, where the j-th region includes m... j There are 1 anode, distributed around the feed port, where 1 ≤ j ≤ n.

[0080] Step 503: Determine the upper limit and lower limit of the area parameters for each area in the industrial aluminum electrolysis cell based on the upper limit and lower limit of the cell parameters, the series current, and the anode current of multiple areas.

[0081] Step 504: Based on the cell voltage, series current, anode current in multiple regions, upper limit of parameters in multiple regions, and lower limit of parameters in multiple regions, perform co-stroke regional feeding control for industrial aluminum electrolysis cells.

[0082] Specifically, the slot parameters in this application are slot resistance or slot resistance change rate.

[0083] Taking the slot resistance as an example, step 501 specifically includes:

[0084] Step 501-1: Determine the upper limit and lower limit of the cell resistance based on the cell resistance-alumina concentration relationship curve.

[0085] Step 501-2: Determine the upper limit of the slot resistance as the upper limit of the slot parameters.

[0086] Step 501-3: Determine that the lower limit of the slot resistance is the upper limit of the slot parameters.

[0087] Correspondingly, when the slot parameter is the slot resistance, step 503 includes:

[0088] Step 503-1: Determine any area in the industrial aluminum electrolysis cell as the current area.

[0089] Step 503-2: Determine the upper limit of the parameters for the current region based on the upper limit of the tank parameters, the series current, the anode current of the current region, and the formula for the upper limit of the parameters for the first region. The formula for the upper limit of the parameters for the first region is:

[0090] in, I represents the upper limit of the parameters of the first region corresponding to the j-th region. line For a series of currents, I j Let J be the anode current corresponding to the j-th region. This is the upper limit of the slot resistance.

[0091] Step 503-3: Based on the lower limit of the tank parameters, the series current, the regional anode current of the current region, and the formula for the lower limit of the parameters of the first region, determine the lower limit of the parameters for the current region. The formula for the lower limit of the parameters of the first region is:

[0092] in, This is the lower limit of the parameters for the first region corresponding to the j-th region. This is the lower limit of the slot resistance.

[0093] When the slot parameter is the slot resistance, step 504 includes:

[0094] Step 504-1: Determine the real-time zone resistance for each zone based on the tank voltage, series current, and anode currents in multiple zones. The zone anode current is the sum of all electrode currents within that zone. The real-time zone resistance is:

[0095] Among them, R j Let V be the real-time area resistance of the j-th region. V represents the slot voltage. ext This is a constant term, taken as 1.65V.

[0096] Step 504-2: During the underfeeding stroke of the industrial aluminum electrolytic cell, determine whether there is an overfeeding conversion zone in the industrial aluminum electrolytic cell, and obtain the first judgment result. If there is an overfeeding conversion zone, the real-time zone resistance is greater than or equal to the upper limit of the corresponding zone parameter; underfeeding refers to the alumina addition rate being less than the theoretical alumina consumption rate of the zone.

[0097] The theoretical consumption rate of zone alumina is:

[0098] in, This represents the theoretical rate of alumina consumption in the j-th region of the electrolytic cell; This indicates the theoretical rate of alumina consumption in the electrolytic cell.

[0099] Step 504-3: If the first judgment result is negative, return to the step "Obtain cell voltage and series current, and regional anode current of each area in the industrial aluminum electrolysis cell".

[0100] Step 504-4: If the first judgment result is yes, then update the feeding method of all areas corresponding to the feeding port in the industrial aluminum electrolysis cell to overfeed and issue an overfeed conversion area fault warning.

[0101] Step 504-5: During the overfeeding stroke in the industrial aluminum electrolysis cell, determine whether there is an underfeeding conversion zone in the industrial aluminum electrolysis cell, and obtain the second judgment result. If there is an underfeeding conversion zone, the real-time zone resistance is less than or equal to the lower limit of the corresponding zone parameter; overfeeding refers to the alumina addition rate being greater than the theoretical alumina consumption rate of the zone.

[0102] Step 504-6: If the second judgment result is negative, return to the step "Obtain cell voltage and series current, and regional anode current of each area in the industrial aluminum electrolysis cell".

[0103] Step 504-7: If the second judgment result is yes, then update the feeding method of all areas corresponding to the feeding port in the industrial aluminum electrolysis cell to insufficient feeding, and issue a fault warning for the insufficient feeding conversion area.

[0104] This application achieves independent control of alumina feeding in different zones by using zone current, cell resistance, cell resistance change rate, zone resistance, and zone resistance change rate. Based on cell resistance and cell resistance change rate, all zones are controlled to have uniform underfeed and overfeed strokes, and each zone's feeding speed is independently controlled based on zone current.

[0105] The slot resistance is calculated according to formula (1), and the zone resistance is calculated according to formula (2). The corresponding resistance change rate refers to the rate of change with time, which is estimated according to formulas (3) and (4) respectively. cell Indicates slot resistance, p cell =|dR cell / dt| represents the rate of change of the slot resistance, R j p represents the resistance of the j-th region. j =|dR j / dt| represents the rate of change of resistance in the j-th region, where t is time, and I line I represents a series of currents. j V represents the anode current in region j, and V represents the tank voltage. ext To obtain a constant value of 1.65V, |ΔR cell |and|ΔR j | represents the absolute value of the increment of the slot resistance and the zone resistance in the time interval Δt, respectively. p cell =|dR cell / dt|=|ΔR cell | / Δt (3) p j =|dR j / dt|=|ΔR j | / Δt (4)

[0106] The slot voltage V and the series current I line The anode current of the region is obtained by measuring the current of all anodes in the region directly using one or more fiber optic current sensors, or by measuring the current of a single anode in the region online using a current sensor, and then summing them up according to formula (5) to obtain the anode current of the region.

[0107] In the formula, I jk Let n be the current of the k-th electrode in the j-th region. j Let be the number of electrodes included in the j-th region.

[0108] During electrolysis, based on the real-time collected cell voltage V and series current I... line Region current I j Real-time calculation of tank resistance R cell , area resistance R j p cell and p j , which serves as the control parameter for the feeding stroke.

[0109] Zoned alumina feeding control refers to controlling the alumina feeding speed by alternating between underfeed and overfeed strokes. Underfeed refers to the alumina feeding rate q. j Theoretical alumina consumption rate in less than the region Right now α = 0.0–0.8; the excessive feeding refers to the rate at which alumina is added, q. j More than the theoretical consumption rate of alumina in the region Right now β = 1.2~2.0; the theoretical alumina consumption rate in the region is given by formula (6) based on the region current I. j In a series of currents, I line The proportion is dynamically determined, among which This indicates the theoretical or predetermined rate of alumina consumption in the electrolytic cell.

[0110] According to the slot resistance R cell The alumina feeding speed in each area is controlled by an alternating cycle of insufficient and excessive feeding strokes, ensuring that the cell resistance remains within an upper limit. and lower limit value Changes within the target range, making Real-time tracking of cell resistance R during electrolysis cell and area resistance R j When each area is in the process of under-feeding, the slot resistance R cell It continues to increase until it equals or exceeds the set upper limit. Right now Then switch to the overfeed stroke, at which point the slot resistance R cell Continuously decrease, until it is equal to or less than the set lower limit. Right now Then switch to the under-feed stroke.

[0111] Each region has a corresponding upper limit for its resistance. and lower limit They are defined as 1≤j≤n.

[0112] In the under-travel, i.e., slot resistance During the process, if the resistance of a certain region is equal to or greater than the upper limit of the resistance of that region, that is... The feeding stroke in that area will be switched to the excessive feeding stroke in advance, and a prompt will be made to check whether there is a blockage in the feeder j causing the low feeding speed. If a fault is found, it should be dealt with promptly; in the excessive feeding stroke, i.e. During the process, if the resistance of a certain region is equal to or less than the lower limit of the region resistance, that is... The feeding stroke of the area will be switched to the under-feeding stroke in advance, and a prompt will be made to check whether the feeder in area j has a fault of excessive feeding speed. If a fault is found, it should be dealt with in time.

[0113] During the normal underfeeding stroke or the overfeeding stroke, i.e. If, at that time, there exists a region whose resistance is greater than the upper limit of the region's resistance and another region whose resistance is less than the lower limit of the region's resistance, that is... and The system will then prompt you to check if there is a problem with the material feeding speed being too low at the feed port in area j and if there is a problem with the material feeding speed being too high at the feed port in area k, and to address these issues promptly.

[0114] Figure 1 shows a typical anode layout of an electrolytic cell with 48 anodes. There are six feed ports (1, 2, ..., 6), each surrounded by eight anodes. Each feed port supplies alumina to eight anodes. A01, A02, A22, and A24 are anodes on side A; B01, B02, B23, and B24 are anodes on side B. Based on this, the electrolytic cell is divided into six zones, with alumina feeding in each zone independently controlled by variations in anode current and resistance. For the case shown in Figure 1 where each zone includes eight anodes (n = 8, m...),... T =48,m j =8, 1≤j≤6. According to the present invention, the alumina feeding in the six regions is independently controlled. Specifically, for region j, its feeding amount is determined by the current I in that region. j It is determined that, based on the cell resistance or the rate of change of cell resistance, the alumina concentration in the area is controlled within a range of 1.5% to 3.5% or even narrower according to the underfeed stroke - overfeed stroke method.

[0115] The underfeeding to achieve the above control objectives refers to the alumina addition rate q. j Theoretical alumina consumption rate in less than the region Right now α = 0.0~0.8; Overfeeding refers to the rate at which alumina is added, q j More than the theoretical consumption rate of alumina in the region Right now β = 1.2 ~ 2.0; while the theoretical consumption rate of alumina in the region is given by formula (6) based on the region current I. j In a series of currents, I line The proportion is dynamically determined.

[0116] To achieve the above control objectives, the alumina feeding speed is controlled by an alternating cycle of underfeed and overfeed strokes, thereby reducing the cell resistance R. cell At an upper limit value and lower limit value Changes within the target range, making Real-time tracking of cell resistance R during electrolysis cell When performing a short-feed stroke, the slot resistance R cell It continues to increase until it equals or exceeds the set upper limit. Right now Then switch to the overfeed stroke, in which the slot resistance R cell Continuously decrease, when it is equal to or less than Then it switches to the under-feed stroke.

[0117] In another exemplary embodiment of this application, taking the tank parameter as the rate of change of tank resistance as an example, step 501 specifically includes:

[0118] Step 501-4: Determine the cell resistance change rate curve based on the cell resistance-alumina concentration relationship curve and the cell resistance change rate formula.

[0119] Step 501-5: Determine the upper limit and lower limit of the cell resistance change rate based on the cell resistance change rate curve.

[0120] Step 501-6: Determine the upper limit of the rate of change of the tank resistance as the upper limit of the tank parameters.

[0121] Step 501-7: Determine the lower limit of the rate of change of tank resistance as the upper limit of the tank parameters.

[0122] Correspondingly, step 503 includes:

[0123] Step 503-4: Determine any area in the industrial aluminum electrolysis cell as the current area.

[0124] Step 503-5: Determine the upper limit of the parameters for the current region based on the upper limit of the tank parameters, the series current, the anode current of the current region, and the formula for the upper limit of the parameters for the second region. The formula for the upper limit of the parameters for the second region is:

[0125] in, I represents the upper limit of the second region parameter corresponding to the j-th region. line For a series of currents, I j Let J be the anode current corresponding to the j-th region. This represents the upper limit of the rate of change of the tank resistance.

[0126] Step 503-6: Determine the lower limit of the parameters for the current region based on the lower limit of the tank parameters, the series current, the regional anode current of the current region, and the formula for the lower limit of the parameters for the second region. The formula for the lower limit of the parameters for the second region is:

[0127] in, This is the lower limit of the parameters for the second region corresponding to the j-th region. This is the lower limit of the rate of change of tank resistance.

[0128] When the slot parameter is the rate of change of slot resistance, step 504 includes:

[0129] Step 504-8: Based on the tank voltage, series current, and anode currents in multiple zones, determine the real-time zone resistance change rate for each zone. The zone anode current is the sum of all electrode currents within that zone. The real-time zone resistance change rate is: p j =|dR j / dt|=|ΔR j | / Δt.

[0130] Where, p j R represents the real-time regional resistance change rate corresponding to the j-th region. j Let ΔR be the real-time region resistance of the j-th region. j Let be the change in region resistance of the j-th region during the time interval Δt. The real-time region resistance is:

[0131] Where V represents the slot voltage, V ext This is a constant term, taken as 1.65V.

[0132] Step 504-9: During the underfeeding stroke of the industrial aluminum electrolytic cell, determine whether there is an overfeeding conversion zone in the industrial aluminum electrolytic cell, and obtain the third judgment result. If there is an overfeeding conversion zone, the real-time regional resistance change rate is greater than or equal to the upper limit of the corresponding regional parameter.

[0133] Step 504-10: If the third judgment result is negative, return to the step "Obtain cell voltage and series current, and the regional anode current of each area in the industrial aluminum electrolysis cell".

[0134] Step 504-11: If the third judgment result is yes, then update the feeding method of all areas corresponding to the feeding port in the industrial aluminum electrolysis cell to overfeed and issue an overfeed conversion area fault warning.

[0135] Step 504-12: During the overfeeding stroke in the industrial aluminum electrolysis cell, determine whether there is an underfeeding conversion zone in the industrial aluminum electrolysis cell, and obtain the fourth judgment result. If there is an underfeeding conversion zone, the real-time regional resistance change rate is less than or equal to the lower limit of the corresponding regional parameter.

[0136] Step 504-13: If the result of the fourth judgment is negative, return to the step "Obtain the cell voltage and series current, and the regional anode current of each area in the industrial aluminum electrolysis cell".

[0137] Step 504-14: If the fourth judgment result is yes, then update the feeding method of all areas corresponding to the feeding port in the industrial aluminum electrolysis cell to insufficient feeding, and issue a fault warning for the insufficient feeding conversion area.

[0138] Each area uniformly adopts an alternating cycle of underfeed and overfeed strokes to control the alumina feeding speed, thereby reducing the cell resistance change rate p. cell At an upper limit value and lower limit value Changes within the target range, even if Real-time tracking of cell resistance change rate p during electrolysis cell and the rate of change of resistivity p j When performing a short-feed stroke, the rate of change of slot resistance p cell It continues to increase until it equals or exceeds the set upper limit. Right now Then switch to the overfeed stroke, at which point the rate of change of tank resistance p cell Continuously decrease, when it is equal to or less than Then switch to the under-feed stroke.

[0139] Each region has a corresponding upper limit for the rate of change of regional resistivity. and lower limit They are defined as 1≤j≤n.

[0140] During the under-travel period, i.e., the rate of change of slot resistance. During the process, if the rate of change of resistance in a certain region is equal to or greater than the upper limit of the rate of change of resistance in that region, that is... The feeding stroke in that area will be switched to the excessive feeding stroke in advance, and a prompt will be made to check whether there is a blockage in the feeder j causing the low feeding speed. If a fault is found, it should be dealt with promptly; in the excessive feeding stroke, i.e. During the process, if the rate of change of resistance in a certain region is equal to or less than the lower limit of the rate of change of resistance in that region, that is... The feeding stroke of the area will be switched to the under-feeding stroke in advance, and a prompt will be made to check whether the feeder in area j has a fault of excessive feeding speed. If a fault is found, it should be dealt with in time.

[0141] During the normal underfeeding stroke or the overfeeding stroke, i.e. If, at that time, there exists a region where the slope of the resistance is greater than the upper limit of the rate of change of resistance in that region, and another region where the resistance is less than the lower limit of the resistance in that region, then... and The system will then prompt you to check if there is a problem with the material feeding speed being too low at the feed port in area j and if there is a problem with the material feeding speed being too high at the feed port in area k, and to address these issues promptly.

[0142] Figure 2 shows the anode layout of an electrolytic cell with 4 feed ports and 36 anodes. As shown in Figure 2, feed ports 1 and 4 each supply 10 anodes, while feed ports 2 and 3 each supply 8 anodes. That is, regions 1 and 4 contain 10 anodes, while regions 2 and 3 contain only 8 anodes. A01, A02, A17, and A18 are all A-side anodes; B01, B02, B17, and B18 are all B-side anodes. Similarly, the alumina feeding in each region is independently controlled, based on the anode current and the rate of change of resistivity in that region. For the case shown in Figure 2 where each region contains different anodes, i.e., n = 4, m... T =36, m1=m4=10, m3=m4=8. According to the present invention, the alumina feeding in the four zones is independently controlled. Specifically, for zone j, its feeding amount is determined by the current I in that zone. j It is determined that the alumina concentration in the controlled area is within a range of 1.5% to 3.5% or even narrower, according to the method of insufficient feeding stroke - excessive feeding stroke.

[0143] The underfeeding to achieve the above control objectives refers to the alumina addition rate q. j Theoretical alumina consumption rate in less than the region Right now α = 0.0–0.8; the excessive feeding refers to the rate at which alumina is added, q. j More than the theoretical consumption rate of alumina in the region Right now β = 1.2 ~ 2.0; while the theoretical consumption rate of alumina in the region is given by formula (6) based on the region current I. j In a series of currents, I line The proportion is dynamically determined.

[0144] To achieve the above control objectives, the alumina feeding speed is controlled by an alternating cycle of underfeed and overfeed strokes, thereby reducing the cell resistance change rate p. cell At an upper limit value and lower limit value Changes within the target range, making Real-time tracking of cell resistance change rate p during electrolysis j When performing a short-feed stroke, the rate of change of slot resistance p cell It continues to increase until it equals or exceeds the set upper limit. Right now Then switch to the overfeed stroke, during which the rate of change of slot resistance p cell Continuously decrease, when it is equal to or less than Right now Then it switches to the under-feed stroke.

[0145] By utilizing the above method, on-demand feeding is achieved through the use of zone current. The switching between insufficient and excessive feeding strokes in each zone is uniformly controlled using information on cell resistance or cell resistance change rate. This ensures that the alumina concentration in each zone remains within the ideal range, reducing the difference in alumina concentration, decreasing the probability of low-pressure anode effect and sedimentation at the bottom of the cell, thereby improving electrolysis current efficiency and achieving high-efficiency, energy-saving, and low-emission production of the electrolytic cell.

[0146] This application also provides an application scenario in which the above-mentioned co-flow, segmented, on-demand feeding control method for industrial aluminum electrolytic cells is applied. Specifically, the co-flow, segmented, on-demand feeding control method for industrial aluminum electrolytic cells provided in this embodiment can be applied in industrial aluminum production scenarios. Industrial aluminum production scenarios include: electrolytic cell preparation, raw material preparation, and aluminum electrolysis; the co-flow, segmented, on-demand feeding control method for industrial aluminum electrolytic cells provided in this embodiment belongs to the feeding control optimization stage within the aluminum electrolysis stage.

[0147] In an exemplary embodiment, a computer device is provided, which may be a server or a terminal, and its internal structure diagram is shown in Figure 6. The computer device includes a processor, memory, input / output interfaces (I / O), and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is connected to the system bus via the I / O interfaces. The processor of the computer device provides computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database of the computer device stores control data for on-demand feeding of co-flow sections in industrial aluminum electrolytic cells. The I / O interfaces of the computer device are used for exchanging information between the processor and external devices. The communication interface of the computer device is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements a method for on-demand feeding of co-flow sections in industrial aluminum electrolytic cells.

[0148] Those skilled in the art will understand that the structure shown in Figure 6 is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0149] In one exemplary embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0150] In one exemplary embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0151] In one exemplary embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0152] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.

[0153] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).

[0154] The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0155] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0156] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for controlling on-demand feeding in a co-flow zone of an industrial aluminum electrolytic cell, characterized in that, include: Based on the cell resistance-alumina concentration relationship curve, determine the upper and lower limits of the cell parameters; The cell voltage and series current are obtained, as well as the regional anode current of each region in the industrial aluminum electrolysis cell; the regions in the industrial aluminum electrolysis cell correspond one-to-one with the feed port, and the feed port is located at the geometric center of the corresponding region; Based on the upper limit of the cell parameters, the lower limit of the cell parameters, the series currents, and the anode currents of the multiple regions, the upper limit of the region parameters and the lower limit of the region parameters for each region in the industrial aluminum electrolysis cell are determined. Based on the cell voltage, the series current, the anode current of multiple regions, the upper limit of multiple region parameters, and the lower limit of multiple region parameters, the industrial aluminum electrolysis cell is subjected to co-flow regional on-demand feeding control.

2. The method for controlling on-demand feeding in a co-flow zone of an industrial aluminum electrolytic cell according to claim 1, characterized in that, Based on the aforementioned cell resistance-alumina concentration relationship curve, the upper and lower limits of the cell parameters are determined, specifically including: Based on the aforementioned cell resistance-alumina concentration relationship curve, determine the upper limit and lower limit of cell resistance; The upper limit of the slot resistance is determined to be the upper limit of the slot parameters; The lower limit of the slot resistance is determined to be the upper limit of the slot parameters.

3. The method for controlling on-demand feeding in a co-flow zoned manner in an industrial aluminum electrolytic cell according to claim 2, characterized in that, Based on the upper limit of the cell parameters, the lower limit of the cell parameters, the series currents, and the anode currents of multiple regions, the upper limit and lower limit of the region parameters for each region in the industrial aluminum electrolysis cell are determined, including: Define any region within the industrial aluminum electrolysis cell as the current region; The upper limit of the parameters for the current region is determined based on the upper limit of the tank parameters, the series current, the anode current of the current region, and the formula for the upper limit of the parameters for the first region. The lower limit of the parameters for the current region is determined based on the lower limit of the tank parameters, the series current, the regional anode current of the current region, and the formula for the lower limit of the parameters for the first region.

4. The method for controlling on-demand feeding in a co-flow zoned manner in an industrial aluminum electrolytic cell according to claim 3, characterized in that, Based on the cell voltage, the series current, the anode current of multiple regions, the upper limits of multiple region parameters, and the lower limits of multiple region parameters, the industrial aluminum electrolysis cell is subjected to co-stroke regional on-demand feeding control, including: The real-time region resistance of each region is determined based on the tank voltage, the series current, and the multiple region anode currents; the region anode current is the sum of all electrode currents within the region. When the industrial aluminum electrolytic cell is in the under-feeding stroke, it is determined whether there is an over-feeding conversion zone in the industrial aluminum electrolytic cell, and the first judgment result is obtained; the real-time zone resistance of the over-feeding conversion zone is greater than or equal to the upper limit of the corresponding zone parameter; under-feeding means that the alumina addition rate is less than the theoretical alumina consumption rate of the zone. If the first judgment result is negative, return to the step "obtain the cell voltage and series current, and the regional anode current of each area in the industrial aluminum electrolysis cell"; If the first judgment result is yes, then the feeding method of all areas corresponding to the feeding ports in the industrial aluminum electrolysis cell will be updated to overfeeding, and an overfeeding conversion area fault warning will be issued. When the industrial aluminum electrolytic cell is in the overfeeding stroke, it is determined whether there is an underfeeding conversion zone in the industrial aluminum electrolytic cell, and a second judgment result is obtained; the real-time zone resistance of the underfeeding conversion zone is less than or equal to the lower limit of the corresponding zone parameter; overfeeding means that the alumina addition rate is greater than the theoretical alumina consumption rate of the zone. If the second judgment result is negative, return to the step "obtain the cell voltage and series current, and the regional anode current of each area in the industrial aluminum electrolysis cell"; If the second judgment result is yes, then the feeding method of all areas corresponding to the feeding ports in the industrial aluminum electrolysis cell will be updated to insufficient feeding, and an emergency warning for the insufficient feeding conversion area will be issued.

5. The method for controlling on-demand feeding in a co-flow zoned manner in an industrial aluminum electrolytic cell according to claim 4, characterized in that, The formula for the upper limit of the parameters in the first region is: in, I represents the upper limit of the parameters of the first region corresponding to the j-th region. line For a series of currents, I j Let J be the anode current corresponding to the j-th region. This is the upper limit of the slot resistance; The formula for the lower limit of the parameters in the first region is: in, This is the lower limit of the parameters for the first region corresponding to the j-th region. This is the lower limit of the slot resistance. The real-time region resistance is: Among them, R j V represents the real-time area resistance of the j-th region; V represents the slot voltage, V ext This is a constant term, taken as 1.65V.

6. The method for controlling on-demand feeding in a co-flow zoned manner in an industrial aluminum electrolytic cell according to claim 5, characterized in that, The theoretical consumption rate of zone alumina is: in, This represents the theoretical rate of alumina consumption in the j-th region of the electrolytic cell; This indicates the theoretical rate of alumina consumption in the electrolytic cell.

7. The method for controlling on-demand feeding in a co-flow zoned manner in an industrial aluminum electrolytic cell according to claim 1, characterized in that, Based on the aforementioned cell resistance-alumina concentration relationship curve, the upper and lower limits of the cell parameters are determined, specifically including: Based on the cell resistance-alumina concentration relationship curve and the cell resistance change rate formula, determine the cell resistance change rate curve; Based on the aforementioned rate of change curve of tank resistance, determine the upper limit and lower limit of the rate of change of tank resistance; The upper limit of the rate of change of tank resistance is determined to be the upper limit of the tank parameters; The lower limit of the rate of change of tank resistance is determined to be the upper limit of the tank parameters.

8. The method for controlling on-demand feeding in a co-flow zoned manner in an industrial aluminum electrolytic cell according to claim 7, characterized in that, Based on the upper limit of the cell parameters, the lower limit of the cell parameters, the series currents, and the anode currents of multiple regions, the upper limit and lower limit of the region parameters for each region in the industrial aluminum electrolysis cell are determined, including: Define any region within the industrial aluminum electrolysis cell as the current region; The upper limit of the parameters for the current region is determined based on the upper limit of the tank parameters, the series current, the anode current of the current region, and the formula for the upper limit of the parameters for the second region. The lower limit of the parameters for the current region is determined based on the lower limit of the tank parameters, the series current, the regional anode current of the current region, and the formula for the lower limit of the parameters for the second region.

9. The method for controlling on-demand feeding in a co-flow zoned manner in an industrial aluminum electrolytic cell according to claim 8, characterized in that, Based on the cell voltage, the series current, the anode current of multiple regions, the upper limits of multiple region parameters, and the lower limits of multiple region parameters, the industrial aluminum electrolysis cell is subjected to co-stroke regional on-demand feeding control, including: The real-time regional resistance change rate of each region is determined based on the tank voltage, the series current, and the multiple regional anode currents; the regional anode current is the sum of all electrode currents within the region. When the industrial aluminum electrolytic cell is in the under-feeding stroke, it is determined whether there is an over-feeding conversion zone in the industrial aluminum electrolytic cell, and a third judgment result is obtained; the real-time regional resistance change rate of the over-feeding conversion zone is greater than or equal to the upper limit of the corresponding regional parameter. If the third judgment result is negative, return to the step "obtain the cell voltage and series current, and the regional anode current of each area in the industrial aluminum electrolysis cell"; If the third judgment result is yes, then the feeding method of all areas corresponding to the feeding ports in the industrial aluminum electrolysis cell will be updated to overfeeding, and an overfeeding conversion area fault warning will be issued. When the industrial aluminum electrolytic cell is in the overfeeding stroke, it is determined whether there is an underfeeding conversion zone in the industrial aluminum electrolytic cell, and a fourth judgment result is obtained; the real-time regional resistance change rate of the underfeeding conversion zone is less than or equal to the lower limit of the corresponding regional parameter. If the fourth judgment result is negative, return to the step "obtain the cell voltage and series current, and the regional anode current of each area in the industrial aluminum electrolysis cell"; If the fourth judgment result is yes, then the feeding method of all areas corresponding to the feeding ports in the industrial aluminum electrolysis cell will be updated to insufficient feeding, and an emergency warning for the insufficient feeding conversion area will be issued.

10. The method for controlling on-demand feeding in a co-flow zone of an industrial aluminum electrolytic cell according to claim 9, characterized in that, The formula for the upper limit of the parameters in the second region is: in, I represents the upper limit of the second region parameter corresponding to the j-th region. line For a series of currents, I j Let J be the anode current corresponding to the j-th region. This represents the upper limit of the rate of change of the tank resistance. The formula for the lower limit of the parameters in the second region is: in, This is the lower limit of the parameters for the second region corresponding to the j-th region. This is the lower limit of the rate of change of tank resistance; The real-time regional resistance change rate is: p j =|dR j / dt|=|ΔR j | / Δt; Where, p j R represents the real-time regional resistance change rate corresponding to the j-th region. j Let ΔR be the real-time region resistance of the j-th region. j Let be the change in regional resistance of the j-th region during the time interval Δt; The real-time area resistance is: Where V represents the slot voltage, V ext This is a constant term, taken as 1.65V.

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