A method and device for preparing aluminum from electrolytic aluminum

Abstract

The present application relates to the field of industrial electrolytic aluminum production, and discloses a method and device for matching aluminum with electrolytic aluminum, including: combining the electrolytic cells to be matched with aluminum to obtain a potential matching aluminum scheme according to the maximum number of electrolytic cells corresponding to a single lifting bag, the electrolytic cell selection coefficient, and the number of electrolytic cells to be matched with aluminum; the mixed aluminum liquid of each group of electrolytic cells to be matched with aluminum in each potential matching aluminum scheme meets the preset standard, and the preset standard is that the weight of the mixed aluminum liquid is less than or equal to the preset weight threshold and the impurity content is less than or equal to the preset impurity content threshold; judging whether there are waste tanks in all potential matching aluminum schemes; if all potential matching aluminum schemes have waste tanks, then determining the potential matching aluminum scheme with the least number of waste tanks as the optimal matching aluminum scheme; if not all potential matching aluminum schemes have waste tanks, then determining the potential matching aluminum scheme with the least number of lifting bags in the potential matching aluminum scheme without waste tanks as the optimal matching aluminum scheme. The matching aluminum method of the present application does not require manual intervention, automatically generates matching aluminum schemes, and has fast matching speed and high efficiency.

Description

Technical Field

[0001] The present application relates to the field of industrial electrolytic aluminum production, and in particular to a method and device for preparing electrolytic aluminum. Background Art

[0002] In the production process of electrolytic aluminum, alumina powder is placed in a single electrolytic cell as a solute, and current is passed into the electrolytic cell to produce aluminum liquid for electrolysis. Because the state of each cell is different and the actual parameters used are different, the impurity content of the aluminum liquid produced after electrolysis is also different. It may even happen that the impurity content of the aluminum liquid in some electrolytic cells is too high and does not meet the quality requirements. Therefore, it is necessary to mix the aluminum liquids from multiple electrolytic cells together so that the impurity content of the mixed aluminum liquid meets the quality requirements. This process is called aluminum blending. Multiple electrolytic cells are generally arranged in a row, and the aluminum liquid in the electrolytic cells will be transported to a ladle, which is called aluminum tapping. A ladle can generally accommodate aluminum liquid produced by multiple electrolytic cells. Therefore, through reasonable aluminum blending scheduling, the aluminum liquids from multiple electrolytic cells can be transported to the same ladle so that the mixed aluminum liquid meets the quality requirements.

[0003] At present, when dispensing aluminum, one way is: the operator configures it according to experience. Assuming that a single lifting bag can accommodate the aluminum liquid of C electrolytic cells, the operator numbers a row of electrolytic cells from near to far according to the distance from the overhead crane, and then takes C electrolytic cells in succession starting from electrolytic cell No. 1 to determine whether the weight and impurities of the mixed aluminum liquid meet the requirements. If they meet the requirements, the aluminum liquid of the C electrolytic cells will be transported to the same lifting bag. If not, some of the C electrolytic cells can be removed or replaced with other electrolytic cells to meet the quality requirements until all the cells are combined. This method of aluminum dispensing is inefficient, and different operators have different aluminum dispensing operations, resulting in different weights and impurity contents of the mixed aluminum liquid. At the same time, the operator cannot consider the overall situation of all the cells, and only considers whether the aluminum output of the starting electrolytic cell and its adjacent electrolytic cells meets the impurity requirements and weight requirements. Another way is to check the grade of the molten aluminum according to the grade parameters of the molten aluminum, cross-sort the checked molten aluminum grades and compare the grade adjacency, so as to obtain the electrolytic cell combination with the best adjacency, and then replace and / or dismantle the electrolytic cells to obtain the cell combination with the best adjacency. When checking the grade of the molten aluminum, the corresponding impurity components of each electrolytic cell are weighted according to the influence of each impurity component in the molten aluminum on the grade of the finished aluminum. The weights of different impurities need to be given manually. Unreasonable weight setting will cause the final mixed aluminum liquid to fail to meet the quality requirements. This method is still affected by human factors, and this method requires the electrolytic cells to be arranged in two parallel rows, which is not suitable for the case of single-row cell arrangement.

[0004] Therefore, how to solve the above technical problems should be the focus of technical personnel in this field. Summary of the invention

[0005] The purpose of this application is to provide a method and device for electrolytic aluminum preparation to improve the efficiency of aluminum preparation without manual intervention.

[0006] In order to solve the above technical problems, the present application provides an electrolytic aluminum preparation method, comprising:

[0007] According to the maximum number of electrolytic cells corresponding to a single ladle, the electrolytic cell selection coefficient, and the number of electrolytic cells to be prepared, the electrolytic cells to be prepared are combined to obtain a potential aluminum preparation scheme; the mixed aluminum liquid of each group of electrolytic cells to be prepared in each potential aluminum preparation scheme meets a preset standard, and the preset standard is that the weight of the mixed aluminum liquid is less than or equal to a preset weight threshold and the impurity content is less than or equal to a preset impurity content threshold;

[0008] Determine whether there are waste tanks in all the potential aluminum-making schemes;

[0009] If all the potential aluminum-addition schemes have the waste tank, then the potential aluminum-addition scheme with the least number of waste tanks is determined to be the optimal aluminum-addition scheme;

[0010] If not all of the potential aluminum distribution plans have the waste tank, then the plan with the least number of lifting bags among the potential aluminum distribution plans without the waste tank is determined as the optimal aluminum distribution plan.

[0011] Optionally, according to the maximum number of electrolytic cells corresponding to a single ladle, the electrolytic cell selection coefficient, and the number of electrolytic cells to be equipped with aluminum, combining the electrolytic cells to be equipped with aluminum to obtain potential aluminum matching schemes includes:

[0012] S11: grouping the aluminum reduction cells to be matched according to the selection coefficient of the aluminum reduction cells and the number of aluminum reduction cells to be matched, and obtaining all preset potential aluminum matching schemes; the target number of aluminum reduction cells to be matched in each group is equal to the maximum number of aluminum reduction cells corresponding to a single ladle;

[0013] S12: Determine whether there are any unassembled remaining electrolytic cells in the preset potential aluminum distribution scheme;

[0014] S13: If the remaining electrolytic cell does not exist in the preset potential aluminum preparation scheme, updating the preset potential aluminum preparation scheme to the potential aluminum preparation scheme;

[0015] S14: If the remaining electrolytic cells exist in the preset potential aluminum preparation scheme, the remaining electrolytic cells are used as new electrolytic cells to be prepared with aluminum, and step S11 is executed, wherein the new target quantity is the previous target quantity minus 1, until the aluminum liquid in one of the remaining electrolytic cells fails to meet the preset standard.

[0016] Optionally, the aluminum reduction cells to be prepared are grouped according to the selection coefficient of the aluminum reduction cells and the number of aluminum reduction cells to be prepared, and all preset potential aluminum preparation schemes are obtained, including:

[0017] S21: Determine the number of the aluminum electrolytic cell to be equipped according to the electrolytic cell selection coefficient and the number of aluminum electrolytic cells to be equipped;

[0018] S22: when the number of non-repeating serial numbers is equal to the target number, determining whether the mixed aluminum liquid to be prepared in the aluminum electrolytic cell corresponding to the target number meets the preset standard;

[0019] S23: If the mixed aluminum liquid does not meet the preset standard, a new electrolytic cell selection coefficient is determined, and step S21 is executed until the mixed aluminum liquid meets the preset standard;

[0020] S24: If the mixed aluminum liquid meets the preset standard, a group of combinations of the aluminum reduction cells to be prepared are determined; a new electrolytic cell selection coefficient is determined, and step S21 is executed until all the aluminum reduction cells to be prepared are combined to obtain a preset potential aluminum preparation scheme;

[0021] S25: Determine a new electrolytic cell selection coefficient and execute step S21 until all preset potential aluminum formulation schemes are obtained.

[0022] Optionally, determining the number of the aluminum electrolytic cell to be equipped according to the electrolytic cell selection coefficient and the number of aluminum electrolytic cells to be equipped includes:

[0023] Determine the product of the electrolytic cell selection coefficient and the number of aluminum electrolytic cells to be equipped;

[0024] The integer part of the product is determined as the number.

[0025] Optionally, when the number of non-repeating serial numbers is equal to the target number, before judging whether the mixed aluminum liquid to be prepared in the aluminum electrolytic cell corresponding to the target number meets the preset standard, the method further includes:

[0026] Determine whether the number is repeated;

[0027] If the number is repeated, a new electrolytic cell selection coefficient is determined, and step S21 is executed until the number is not repeated;

[0028] If the numbers are not repeated, the numbers are retained, and it is determined whether the number of retained numbers is equal to the target number;

[0029] If the number of reserved numbers is not equal to the target number, a new electrolytic cell selection coefficient is determined, and step S21 is executed until the numbers are not repeated.

[0030] Optionally, the method for determining the electrolytic cell selection coefficient includes:

[0031] S31: determining the coefficient to be determined according to the sampling value and the maximum number of electrolytic cells corresponding to a single lifting bag;

[0032] S32: Determine whether the undetermined coefficient is greater than 1;

[0033] S33: If the undetermined coefficient is greater than 1, a new sampling value is selected and the process returns to step S31;

[0034] S34: If the undetermined coefficient is not greater than 1, determine whether the sampled value meets a preset condition; the preset condition is that the sampled value is greater than or equal to 1 and less than or equal to a preset value, and the preset value is the maximum number of electrolytic cells corresponding to a single ladle plus 1;

[0035] S35: If the sampled value satisfies the preset condition, determining the undetermined coefficient as the electrolytic cell selection coefficient;

[0036] S36: If the sampling value does not meet the preset condition, a new sampling value is selected and the process returns to step S31 until the electrolytic cell selection coefficient is determined.

[0037] Optionally, the sampling values ​​are selected according to Gaussian distribution or average uniform distribution.

[0038] Optionally, when there are multiple potential aluminum-addition schemes with the least number of waste tanks, determining that the potential aluminum-addition scheme with the least number of waste tanks is the optimal aluminum-addition scheme includes:

[0039] Determine the moving distance of the overhead crane when aluminum is distributed according to the potential aluminum distribution plan with the least amount of waste tanks;

[0040] Determine the potential aluminum distribution plan with the shortest moving distance as the optimal aluminum distribution plan.

[0041] Optionally, when there are multiple solutions with the least number of ladles among the potential aluminum distribution solutions without waste tanks, determining the solution with the least number of ladles among the potential aluminum distribution solutions without waste tanks as the optimal aluminum distribution solution includes:

[0042] Determine the moving distance of the overhead crane when dispensing aluminum according to the potential aluminum dispensing scheme with the least number of each ladle;

[0043] Determine the potential aluminum distribution plan with the shortest moving distance as the optimal aluminum distribution plan.

[0044] The present application also provides an electrolytic aluminum preparation device, comprising:

[0045] A combination module, for combining the aluminum electrolytic cells to be prepared to obtain a potential aluminum preparation scheme according to the maximum number of electrolytic cells corresponding to a single lifting bag, the electrolytic cell selection coefficient, and the number of aluminum electrolytic cells to be prepared; the mixed aluminum liquid of each group of the aluminum electrolytic cells to be prepared in each potential aluminum preparation scheme meets a preset standard, and the preset standard is that the weight of the mixed aluminum liquid is less than or equal to a preset weight threshold and the impurity content is less than or equal to a preset impurity content threshold;

[0046] The first judgment module is used to judge whether there are waste tanks in all the potential aluminum-matching schemes;

[0047] A first determination module is used to determine that the potential aluminum distribution scheme with the least number of waste tanks is the optimal aluminum distribution scheme if all the potential aluminum distribution schemes have the waste tanks;

[0048] The second determination module is used to determine that the solution with the least number of lifting bags among the potential aluminum distribution solutions without waste tanks is the optimal aluminum distribution solution if not all of the potential aluminum distribution solutions have the waste tank.

[0049] The present application provides a method for aluminum matching of electrolytic aluminum, comprising combining the electrolytic cells to be matched with aluminum to obtain potential aluminum matching schemes according to the maximum number of electrolytic cells corresponding to a single ladle, an electrolytic cell selection coefficient, and the number of electrolytic cells to be matched with aluminum; the mixed aluminum liquid of each group of the electrolytic cells to be matched with aluminum in each potential aluminum matching scheme meets a preset standard, and the preset standard is that the weight of the mixed aluminum liquid is less than or equal to a preset weight threshold and the impurity content is less than or equal to a preset impurity content threshold; judging whether waste cells exist in all the potential aluminum matching schemes; if the waste cells exist in all the potential aluminum matching schemes, determining the potential aluminum matching scheme with the least number of waste cells as the optimal aluminum matching scheme; if not all the potential aluminum matching schemes have the waste cells, determining the scheme with the least number of ladle ladles among the potential aluminum matching schemes without waste cells as the optimal aluminum matching scheme.

[0050] It can be seen that in this application, when aluminum is matched, the maximum number of electrolytic cells corresponding to a single lifting bag, the electrolytic cell selection coefficient, and the number of electrolytic cells to be matched are combined, and the mixed aluminum liquid corresponding to each combination meets the preset standard to obtain a potential aluminum matching scheme, and then the optimal aluminum matching scheme is determined according to whether there is a waste tank in the potential aluminum matching scheme. When there are waste tanks in all potential aluminum matching schemes, the potential aluminum matching scheme with the least number of waste tanks is determined as the optimal aluminum matching scheme to minimize the waste of aluminum liquid; when all potential aluminum matching schemes have both schemes with waste tanks and schemes without waste tanks, among these potential aluminum matching schemes without waste tanks, the method with the least number of lifting bags is selected as the optimal aluminum matching scheme to minimize the total number of lifting bags. The entire aluminum matching process does not require manual intervention, and the aluminum matching scheme is automatically generated, with fast aluminum matching speed and high efficiency; and there is no requirement for the arrangement of the electrolytic cells to be matched in this application, which can be either single-row or multi-row, with a wider range of applications.

[0051] In addition, the present application also provides a device having the above advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0053] Figure 1 A flow chart of a method for preparing aluminum from electrolytic aluminum provided in an embodiment of the present application;

[0054] Figure 2 A flow chart of a method for determining an electrolytic cell selection coefficient provided in an embodiment of the present application;

[0055] Figure 3 A flow chart of a potential aluminum matching scheme provided in an embodiment of the present application;

[0056] Figure 4 A flow chart of obtaining a preset potential aluminum matching scheme provided in an embodiment of the present application;

[0057] Figure 5 This is a structural block diagram of the electrolytic aluminum preparation device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0058] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0059] As described in the background technology section, currently, one way to mix aluminum is to rely on the experience of the operator, which has the disadvantages of low efficiency, different operators performing different mixing operations, and inability to comprehensively consider all electrolytic cells. Another way is for both manual and machine mixing to occur, which is still affected by human factors. In addition, this method requires the electrolytic cells to be arranged in two parallel rows, which is not suitable for a single row of cells.

[0060] In view of this, the present application provides a method for preparing aluminum electrolytically. Figure 1 , the method comprising:

[0061] Step S101: According to the maximum number of electrolytic cells corresponding to a single ladle, the electrolytic cell selection coefficient, and the number of electrolytic cells to be equipped with aluminum, the electrolytic cells to be equipped with aluminum are combined to obtain potential aluminum matching schemes; the mixed aluminum liquid of each group of electrolytic cells to be equipped with aluminum in each potential aluminum matching scheme meets a preset standard, and the preset standard is that the weight of the mixed aluminum liquid is less than or equal to a preset weight threshold and the impurity content is less than or equal to a preset impurity content threshold.

[0062] Potential aluminum blending schemes include all schemes for combining the electrolytic cells to be blended so that the mixed aluminum liquid in the ladle corresponding to each combination meets the preset standards.

[0063] In each potential aluminum allocation plan, each combination of aluminum reduction cells to be allocated corresponds to a ladle, and the number of aluminum reduction cells to be allocated in each combination is greater than or equal to 1, and less than or equal to the maximum number of reduction cells corresponding to a single ladle.

[0064] Assume that there are n aluminum reduction cells to be equipped. The aluminum reduction cells to be equipped are numbered from 1 to n according to the distance from the overhead crane from near to far. The aluminum output of the corresponding aluminum reduction cells to be equipped is recorded as a1, a2, a3, ..., a n-1 、a n , the output of each aluminum reduction cell to be equipped is basically the same. Assuming the average output of the aluminum reduction cell to be equipped is a, and the maximum weight of aluminum liquid that the lifting bag can hold is b, then the maximum number of electrolytic cells corresponding to a single lifting bag is c = [b / a], [] means rounding down to an integer. That is, a single lifting bag can hold aluminum liquid in less than or equal to c electrolytic cells.

[0065] The preset weight threshold is less than or equal to the maximum weight of the aluminum liquid that the lifting bag can hold. Generally, the preset weight threshold is the maximum weight of the aluminum liquid that the lifting bag can hold.

[0066] It should be noted that the preset impurity content threshold is not limited in this application and depends on the circumstances.

[0067] The aluminum liquid in each aluminum reduction cell contains a total of k impurities such as Fe, Si, and Cu. Since there are n cells in total, the content of all impurities in the i-th aluminum reduction cell is represented by the vector z i If z i =[z i，1 , z i，2 , z i，3 , ..., z i，k-1 , z i，k ], i∈(1,n).

[0068] The method for judging whether the mixed aluminum liquid in each ladle meets the preset standard is as follows: assuming that the aluminum liquids of j aluminum electrolytic cells to be prepared are mixed, j≤c, and the numbers of the aluminum electrolytic cells to be prepared are set as {j1, j2, ..., j j},j j ≤n, the total weight of aluminum liquid in j aluminum reduction cells to be equipped must satisfy a 总 =a j，1 +a j，2 +...+a j，j ≤b, average impurity content is The average impurity content zz is a vector, that is, zz = [zz1, zz2, zz3, ..., zz k-1 ,zz k The impurity content standard of the mixed aluminum liquid in each ladle is recorded as z b =[z b，1 , z b，2 , z b，3 , ..., z b，k-1 , z b，k ], so the impurity content must satisfy {zz1≤z b，1 ,zz2≤z b，2 ,zz3≤z b，3 ,...,zz k-1 ≤z b，k-1 ,zz k ≤z b，k}.

[0069] The method for determining the electrolytic cell selection coefficient is described below.

[0070] Step S102: Determine whether there are waste tanks in all the potential aluminum-matching schemes.

[0071] A waste cell refers to an aluminum reduction cell that cannot be successfully combined with other aluminum reduction cells to be matched so that the mixed aluminum liquid in the ladle meets the preset requirements, or an aluminum reduction cell in which the aluminum liquid in only one cell cannot meet the preset requirements.

[0072] Step S103: If all the potential aluminum matching schemes have waste tanks, then determine that the potential aluminum matching scheme with the least number of waste tanks is the optimal aluminum matching scheme.

[0073] When there is only one potential aluminum distribution plan with the least number of waste tanks, then this potential aluminum distribution plan is the optimal aluminum distribution plan; when the number of potential aluminum distribution plans with the least number of waste tanks is two or more, they can be selected randomly or according to the moving distance of the overhead crane, which is explained in detail below.

[0074] When there are multiple potential aluminum-addition schemes with the least number of waste tanks, determining the potential aluminum-addition scheme with the least number of waste tanks as the optimal aluminum-addition scheme includes:

[0075] Determine the moving distance of the overhead crane when aluminum is distributed according to the potential aluminum distribution plan with the least amount of waste tanks;

[0076] Determine the potential aluminum distribution plan with the shortest moving distance as the optimal aluminum distribution plan.

[0077] Step S104: If not all of the potential aluminum distribution schemes have the waste tank, then the scheme with the least number of lifting bags among the potential aluminum distribution schemes without the waste tank is determined as the optimal aluminum distribution scheme.

[0078] After determining the optimal aluminum distribution plan, the method also includes: sending the optimal aluminum distribution plan to a display terminal for reference by operators.

[0079] As an implementable method, step S104 includes:

[0080] Step S1041: Eliminate the potential aluminum-mixing schemes with the waste tank, and obtain a pending aluminum-mixing scheme.

[0081] Step S1042: Determine that the proposed aluminum distribution plan with the least number of lifting bags is the optimal aluminum distribution plan.

[0082] When there is only one potential aluminum distribution plan with the least number of lifting bags, then this potential aluminum distribution plan is the optimal aluminum distribution plan; when the number of potential aluminum distribution plans with the least number of lifting bags is two or more, they can be selected randomly or according to the moving distance of the overhead crane, which is explained in detail below.

[0083] When there are multiple solutions with the least number of ladles among the potential aluminum distribution solutions without waste tanks, determining the solution with the least number of ladles among the potential aluminum distribution solutions without waste tanks as the optimal aluminum distribution solution includes:

[0084] Determine the moving distance of the overhead crane when dispensing aluminum according to the potential aluminum dispensing scheme with the least number of each ladle;

[0085] Determine the potential aluminum distribution plan with the shortest moving distance as the optimal aluminum distribution plan.

[0086] The methods for determining the moving distance of the overhead crane in the above two cases are the same and are described below.

[0087] Assuming that a group of aluminum reduction cells to be supplied in the potential aluminum supply scheme for which the crane moving distance needs to be calculated is numbered {l1, l2, ..., lp}, p≤n, then the crane moving distance corresponding to a group of aluminum reduction cells to be supplied is If the number of platform lifts in the potential aluminum distribution scheme that requires the calculation of the overhead crane moving distance is s, it means that there are a total of s cell combinations, that is, there are s groups of aluminum electrolytic cells to be distributed, so the total overhead crane moving distance is where q i is the crane moving distance of the i-th slot combination.

[0088] In order to minimize the moving distance of the overhead crane, preferably, the numbers of the aluminum electrolytic cells to be equipped corresponding to each lifting bag are consecutive.

[0089] Please refer to Figure 2 , the method for determining the electrolytic cell selection coefficient includes:

[0090] S31: Determine the coefficient to be determined according to the sampling value and the maximum number of electrolytic cells corresponding to a single lifting bag.

[0091] The sampling value is a sampling based on a probability distribution. The present application does not limit the selection method of the sampling value, and the sampling value can be selected at will. For example, the sampling value can be selected according to Gaussian distribution or average uniform distribution or other distribution methods. For example, when selecting by Gaussian distribution, the sampling value can be selected based on a Gaussian distribution with a mean of 1 and a standard deviation of 1.

[0092] The unknown coefficient is determined according to formula (1):

[0093] f=r / (c+1) (1)

[0094] In the formula, f is the unknown coefficient, r is the sampling value, and c is the maximum number of electrolytic cells corresponding to a single ladle.

[0095] S32: Determine whether the undetermined coefficient is greater than 1.

[0096] S33: If the undetermined coefficient is greater than 1, a new sampling value is selected and the process returns to step S31.

[0097] S34: If the undetermined coefficient is not greater than 1, determine whether the sampling value meets the preset condition; the preset condition is that the sampling value is greater than or equal to 1 and less than or equal to a preset value, and the preset value is the maximum number of electrolytic cells corresponding to a single lifting bag plus 1.

[0098] S35: If the sampled value satisfies the preset condition, the undetermined coefficient is determined to be the electrolytic cell selection coefficient.

[0099] S36: If the sampling value does not meet the preset condition, a new sampling value is selected and the process returns to step S31 until the electrolytic cell selection coefficient is determined.

[0100] In this application, when aluminum is matched, the maximum number of electrolytic cells corresponding to a single lifting bag, the electrolytic cell selection coefficient, and the number of electrolytic cells to be matched are combined. The mixed aluminum liquid corresponding to each combination meets the preset standard to obtain a potential aluminum matching scheme, and then the optimal aluminum matching scheme is determined according to whether there is a waste tank in the potential aluminum matching scheme. When there are waste tanks in all potential aluminum matching schemes, the potential aluminum matching scheme with the least number of waste tanks is determined as the optimal aluminum matching scheme to minimize the waste of aluminum liquid; when all potential aluminum matching schemes have both schemes with waste tanks and schemes without waste tanks, among these potential aluminum matching schemes without waste tanks, the method with the least number of lifting bags is selected as the optimal aluminum matching scheme to minimize the total number of lifting bags. The entire aluminum matching process does not require manual intervention, and the aluminum matching scheme is automatically generated, with fast aluminum matching speed and high efficiency; and in this application, there is no requirement for the arrangement of the electrolytic cells to be matched, which can be either single-row or multi-row, with a wider range of applications.

[0101] Based on the above embodiments, in one embodiment of the present application, please refer to Figure 3 According to the maximum number of electrolytic cells corresponding to a single ladle, the electrolytic cell selection coefficient, and the number of electrolytic cells to be equipped with aluminum, the potential aluminum matching schemes obtained by combining the electrolytic cells to be equipped with aluminum include:

[0102] S11: Grouping the aluminum reduction cells to be equipped according to the electrolytic cell selection coefficient and the number of aluminum reduction cells to be equipped to obtain all preset potential aluminum matching schemes; the target number of aluminum reduction cells to be equipped in each group is equal to the maximum number of electrolytic cells corresponding to a single ladle.

[0103] S12: Determine whether there are any unassembled remaining electrolytic cells in the preset potential aluminum distribution scheme.

[0104] Step S11 and step S12 are explained together below.

[0105] First, each ladle is charged with aluminum at full capacity to determine the combination of aluminum reduction cells to be charged. The remaining cells that cannot form c combinations with other aluminum reduction cells to be charged are called the remaining cells, thus obtaining the preset potential aluminum charging scheme. Among them, the mixed aluminum liquid of each group of aluminum reduction cells to be charged meets the preset standards.

[0106] Each ladle can hold the aluminum liquid from c aluminum reduction cells to be supplied, and there are n aluminum reduction cells to be supplied. Then the maximum number of full-capacity ladles is d = [n / c], where [] represents rounding down to an integer. That is, there are at most d combinations in each preset potential aluminum supply scheme.

[0107] Assuming that there are w cell combinations in a preset potential aluminum distribution plan, w is any integer between 0 and d, and the number of electrolytic cells to be distributed with aluminum in each cell combination is c, that is, there are w ladles corresponding to the preset potential aluminum distribution plan, then the number of remaining electrolytic cells e=nw×c.

[0108] When w=d, 0<e<c, and the mixed aluminum liquid in the e electrolytic cells meets the preset standard, the e electrolytic cells correspond to one ladle. At this time, the number of ladle in the optimal aluminum distribution plan is d+1, and the tanks for the aluminum liquid transported by each ladle are numbered continuously.

[0109] S13: If the remaining electrolytic cells do not exist in the preset potential aluminum preparation scheme, the preset potential aluminum preparation scheme is updated to the potential aluminum preparation scheme.

[0110] S14: If the remaining electrolytic cells exist in the preset potential aluminum preparation scheme, the remaining electrolytic cells are used as new electrolytic cells to be prepared with aluminum, and step S11 is executed, wherein the new target quantity is the previous target quantity minus 1, until the aluminum liquid in one of the remaining electrolytic cells fails to meet the preset standard.

[0111] When e≠0, aluminum is supplied to the e remaining electrolytic cells, and the remaining electrolytic cells are grouped according to the electrolytic cell selection coefficient and the number of electrolytic cells to be supplied with aluminum. The target number of each group of electrolytic cells to be supplied with aluminum is c-1. It is judged whether there are any remaining electrolytic cells that have not been combined. If not, at least one new combination is obtained, and the new combination is added to the preset potential aluminum supply scheme to complete the update of the preset potential aluminum supply scheme to obtain the potential aluminum supply scheme; if there are still remaining electrolytic cells, the remaining electrolytic cells are grouped again according to the electrolytic cell selection coefficient and the number of electrolytic cells to be supplied with aluminum, and the target number of each group of electrolytic cells to be supplied with aluminum is c-2. It is judged whether there are any remaining electrolytic cells that have not been combined. If not, at least one new combination is obtained, and all the new combinations are added to the preset potential aluminum supply scheme to complete the update of the preset potential aluminum supply scheme to obtain the potential aluminum supply scheme; if there are still remaining electrolytic cells, and so on, the remaining electrolytic cells are continued to be grouped until the target number of each group of electrolytic cells to be supplied with aluminum is 1. When the remaining electrolytic cells do not meet the preset criteria according to the combination of one cell, these cells are marked as waste cells. In this way, the potential aluminum matching plan is completed.

[0112] Based on any of the above embodiments, in one embodiment of the present application, please refer to Figure 4 , the aluminum reduction cells to be equipped are grouped according to the electrolytic cell selection coefficient and the number of aluminum reduction cells to be equipped, and all preset potential aluminum matching schemes are obtained, including:

[0113] S21: Determine the serial number of the aluminum electrolytic cell to be equipped according to the electrolytic cell selection coefficient and the number of the aluminum electrolytic cells to be equipped.

[0114] Determining the number of the aluminum electrolytic cell to be equipped according to the electrolytic cell selection coefficient and the number of the aluminum electrolytic cells to be equipped includes:

[0115] S211: Determine the product of the electrolytic cell selection coefficient and the number of aluminum electrolytic cells to be equipped;

[0116] S212: Determine the integer part of the product as the number.

[0117] S22: When the number of non-repeating serial numbers is equal to the target number, determine whether the mixed aluminum liquid to be prepared in the aluminum electrolytic cell corresponding to the target number meets the preset standard.

[0118] First, the weight and impurity content of the mixed aluminum liquid are determined, and then compared with the preset standard. For details, please refer to the above embodiment, which will not be described in detail here.

[0119] S23: If the mixed aluminum liquid does not meet the preset standard, a new electrolytic cell selection coefficient is determined, and step S21 is executed until the mixed aluminum liquid meets the preset standard.

[0120] S24: If the mixed aluminum liquid meets the preset standard, a group of combinations of the aluminum reduction cells to be prepared are determined; a new electrolytic cell selection coefficient is determined, and step S21 is executed until all the aluminum reduction cells to be prepared are combined to obtain a preset potential aluminum preparation scheme.

[0121] For example, when there are x preset potential aluminum matching schemes for n aluminum reduction cells to be matched, and one preset potential aluminum matching scheme includes y combinations of aluminum reduction cells to be matched, a group of combinations of aluminum reduction cells to be matched is determined in step S24, that is, one of the y combinations is determined, and the above process is repeated by selecting coefficients of new electrolytic cells to obtain y combinations, that is, one of the x preset potential aluminum matching schemes is obtained.

[0122] S25: Determine a new electrolytic cell selection coefficient and execute step S21 until all preset potential aluminum formulation schemes are obtained.

[0123] In this step, the coefficient is selected by the electrolytic cell, and the above process is repeated to obtain another preset potential aluminum formulation scheme. By continuously repeating the above process, x preset potential aluminum formulation schemes can be obtained.

[0124] When determining the number of the aluminum electrolytic cell to be prepared, there are two situations, including non-repetitive numbers and repeated numbers. The process of obtaining the target number of non-repetitive numbers is described below. When the number of non-repetitive numbers is equal to the target number, before judging whether the mixed aluminum liquid of the aluminum electrolytic cell to be prepared corresponding to the target number meets the preset standard, it also includes:

[0125] Determine whether the number is repeated;

[0126] If the number is repeated, a new electrolytic cell selection coefficient is determined, and step S21 is executed until the number is not repeated;

[0127] If the numbers are not repeated, the numbers are retained, and it is determined whether the number of retained numbers is equal to the target number;

[0128] If the number of reserved numbers is not equal to the target number, a new electrolytic cell selection coefficient is determined, and step S21 is executed until the numbers are not repeated.

[0129] The following is an explanation of the electrolytic aluminum preparation method in this application using a specific case.

[0130] Step 1: Number the n aluminum reduction cells to be equipped from 1 to n according to the direction from near to far from the overhead crane, and the aluminum output of the corresponding aluminum reduction cells to be equipped is recorded as a1, a2, a3, ..., a n-1 、a n , the average value of aluminum output is recorded as a, and the maximum number of electrolytic cells corresponding to a single ladle is determined c = [b / a];

[0131] Step 2: Take a point r based on Gaussian distribution sampling with a mean of 1 and a standard deviation of 1;

[0132] Step 3: Calculate the unknown coefficient f according to formula (1);

[0133] Step 4: Determine whether the undetermined coefficient f is greater than 1. If the undetermined coefficient f is greater than 1, return to step 2; if f is not greater than 1, proceed to step 5;

[0134] Step 5: Determine whether r satisfies 1≤r≤c+1. If not, return to step 1 and re-select r. If yes, proceed to step 6.

[0135] Step 6, taking the integer part of f×n as the serial number of the electrolytic cell to be taken;

[0136] Step 7, repeat the process of step 2 to step 6 until c non-repeating electrolytic cell numbers are selected;

[0137] Step 8, determining the weight and impurities of the mixed aluminum liquid of the c electrolytic cells, and judging whether the weight and impurities of the mixed aluminum liquid meet the preset standards. If they do not meet the preset standards, repeating steps 2 to 7 until the mixed aluminum liquid of the c electrolytic cells meets the preset standards. If they meet the preset standards, it means that a group of suitable electrolytic cells has been selected.

[0138] Step 9, repeating steps 2 to 8, combining all electrolytic cells to obtain a preset potential aluminum distribution plan;

[0139] Step 10, determining whether there are any remaining electrolytic cells in the preset potential aluminum-making scheme. If there are no remaining electrolytic cells, the preset potential aluminum-making scheme is updated to the potential aluminum-making scheme; if there are any remaining electrolytic cells, proceeding to step 11;

[0140] Step 11, recombining the remaining electrolytic cells, the combination method is similar to step 2 to step 8, but the number c of non-repeating electrolytic cell numbers needs to be changed to c-1, that is, c electrolytic cells are no longer combined, but c-1 electrolytic cells are combined; of course, at this time, it is still possible that c-1 cells cannot be combined, then it is necessary to try to combine c-2 cells, and so on, until a combination of 1 cell is tried. When the remaining cells do not meet the preset standard according to the combination of 1 cell, these cells are marked as waste cells, and a potential aluminum matching scheme is obtained at this time;

[0141] Step 12, repeat steps 2 to 11 to obtain x potential aluminum matching schemes;

[0142] Step 13, determining whether there is a waste tank in each potential aluminum distribution scheme;

[0143] Step 14: If all potential aluminum distribution schemes have waste tanks, select the potential aluminum distribution scheme with the least number of waste tanks. If there is only one potential aluminum distribution scheme with the least number of waste tanks, then this potential aluminum distribution scheme is the optimal aluminum distribution scheme. If there are two or more potential aluminum distribution schemes with the least number of waste tanks, determine the moving distance of the overhead crane corresponding to each potential aluminum distribution scheme with the least number of waste tanks, and determine the optimal aluminum distribution scheme with the shortest moving distance.

[0144] Step 15. If there are both schemes with and without waste tanks among all potential aluminum distribution schemes, then the scheme with waste tanks is eliminated to obtain the pending aluminum distribution scheme; determine the number of lifting bags corresponding to each pending aluminum distribution scheme, and determine that the pending aluminum distribution scheme with the least number of lifting bags is the optimal aluminum distribution scheme. When there is only one pending aluminum distribution scheme with the least number of lifting bags, the pending aluminum distribution scheme is the optimal aluminum distribution scheme; when there are two or more pending aluminum distribution schemes with the least number of lifting bags, determine the overhead crane moving distance corresponding to each pending aluminum distribution scheme, and determine that the one with the shortest moving distance is the optimal aluminum distribution scheme;

[0145] Step 16: Push the optimal aluminum distribution plan to the operator for reference.

[0146] The following is an introduction to the electrolytic aluminum preparation device provided in the embodiment of the present application. The electrolytic aluminum preparation device described below and the electrolytic aluminum preparation method described above can be referenced to each other.

[0147] Figure 5 The structural block diagram of the electrolytic aluminum preparation device provided in the embodiment of the present application is shown in FIG. Figure 5 The electrolytic aluminum preparation device may include:

[0148] The combination module 100 is used to combine the aluminum reduction cells to be prepared to obtain a potential aluminum preparation scheme according to the maximum number of electrolytic cells corresponding to a single lifting bag, the electrolytic cell selection coefficient, and the number of aluminum reduction cells to be prepared; the mixed aluminum liquid of each group of aluminum reduction cells to be prepared in each potential aluminum preparation scheme meets a preset standard, and the preset standard is that the weight of the mixed aluminum liquid is less than or equal to a preset weight threshold and the impurity content is less than or equal to a preset impurity content threshold;

[0149] The first judgment module 200 is used to judge whether there are waste tanks in all the potential aluminum-matching schemes;

[0150] A first determination module 300 is used to determine that the potential aluminum distribution scheme with the least number of waste tanks is the optimal aluminum distribution scheme if all the potential aluminum distribution schemes have the waste tanks;

[0151] The second determination module 400 is used to determine that the solution with the least number of lifting bags among the potential aluminum distribution solutions without waste tanks is the optimal aluminum distribution solution if not all of the potential aluminum distribution solutions have the waste tank.

[0152] The electrolytic aluminum matching device of this embodiment is used to implement the aforementioned electrolytic aluminum matching method. Therefore, the specific implementation method of the electrolytic aluminum matching device can be seen in the embodiment part of the electrolytic aluminum matching method in the previous text. For example, the combination module 100, the judgment module 200, the first determination module 300, and the second determination module 400 are respectively used to implement steps S101, S102, S103 and S104 in the aforementioned electrolytic aluminum matching method. Therefore, its specific implementation method can refer to the description of the corresponding various parts of the embodiment, which will not be repeated here.

[0153] Optionally, the combined module 100 includes:

[0154] A grouping unit, used to execute S11: grouping the aluminum reduction cells to be equipped according to the selection coefficient of the aluminum reduction cells and the number of aluminum reduction cells to be equipped, to obtain all preset potential aluminum matching schemes; the target number of the aluminum reduction cells to be equipped in each group is equal to the maximum number of aluminum reduction cells corresponding to a single ladle;

[0155] A judgment unit, used to execute S12: judging whether there are any uncombined remaining electrolytic cells in the preset potential aluminum distribution scheme;

[0156] An updating unit, configured to execute S13: if the remaining electrolytic cells do not exist in the preset potential aluminum-addition scheme, updating the preset potential aluminum-addition scheme to a potential aluminum-addition scheme;

[0157] A repeating unit is used to execute S14: if the remaining electrolytic cells exist in the preset potential aluminum preparation scheme, the remaining electrolytic cells are used as new electrolytic cells to be prepared with aluminum, and step S11 is executed, wherein the new target number is the previous target number minus 1, until the aluminum liquid in one of the remaining electrolytic cells fails to meet the preset standard.

[0158] Optionally, the grouping unit includes:

[0159] A determination subunit is used to execute S21: determine the number of the aluminum electrolytic cell to be equipped according to the electrolytic cell selection coefficient and the number of aluminum electrolytic cells to be equipped;

[0160] A first judgment subunit is used to execute S22: when the number of non-repeating serial numbers is equal to the target number, judging whether the mixed aluminum liquid to be prepared in the aluminum electrolytic cell corresponding to the target number meets the preset standard;

[0161] The first repeating subunit is used to execute S23: if the mixed aluminum liquid does not meet the preset standard, determine a new electrolytic cell selection coefficient, and execute step S21 until the mixed aluminum liquid meets the preset standard;

[0162] The second repeating subunit is used to execute S24: if the mixed aluminum liquid meets the preset standard, determine a group of combinations of the aluminum reduction cells to be prepared; determine a new electrolytic cell selection coefficient, and execute step S21 until all the aluminum reduction cells to be prepared are combined to obtain a preset potential aluminum preparation scheme;

[0163] The third repeating subunit is used to execute S25: determine a new electrolytic cell selection coefficient, and execute step S21 until all preset potential aluminum distribution schemes are obtained.

[0164] Optionally, determining the subunit includes:

[0165] A first determination subunit is used to determine the product of the electrolytic cell selection coefficient and the number of aluminum electrolytic cells to be equipped;

[0166] The second determining subunit is used to determine the integer part of the product as the number.

[0167] Optionally, also include:

[0168] A second judging subunit is used to judge whether the number is repeated;

[0169] A fourth repeating subunit, for determining a new electrolytic cell selection coefficient if the number is repeated, and executing step S21 until the number is not repeated;

[0170] A retaining and judging subunit, used for retaining the number if the number is not repeated, and judging whether the number of the retained numbers is equal to the target number;

[0171] The fifth repeating subunit is used to determine a new electrolytic cell selection coefficient if the number of the retained numbers is not equal to the target number, and execute step S21 until the numbers are not repeated.

[0172] Optionally, also include:

[0173] The third determination module is used to execute S31: determine the coefficient to be determined according to the sampled value and the maximum number of electrolytic cells corresponding to a single lifting bag;

[0174] A second judgment module is used to execute S32: judging whether the undetermined coefficient is greater than 1;

[0175] A setting module, used to execute S33: if the undetermined coefficient is greater than 1, select a new sampling value and return to step S31;

[0176] A third judgment module is used to execute S34: if the undetermined coefficient is not greater than 1, then determine whether the sampled value meets a preset condition; the preset condition is that the sampled value is greater than or equal to 1 and less than or equal to a preset value, and the preset value is the maximum number of electrolytic cells corresponding to a single lifting bag plus 1;

[0177] A fourth determination module is used to execute S35: if the sampled value satisfies the preset condition, determine the undetermined coefficient as the electrolytic cell selection coefficient;

[0178] The repetition module is used to execute S36: if the sampling value does not meet the preset condition, a new sampling value is selected, and the process returns to step S31 until the electrolytic cell selection coefficient is determined.

[0179] Optionally, when there are multiple potential aluminum distribution solutions with the least number of waste tanks, the first determination module 300 includes:

[0180] A first determining unit is used to determine the moving distance of the overhead crane when aluminum is distributed according to the potential aluminum distribution scheme with the least amount of waste tanks;

[0181] The second determination unit is used to determine that the potential aluminum distribution plan with the shortest moving distance is the optimal aluminum distribution plan.

[0182] Optionally, when there are multiple potential aluminum distribution solutions with the least number of lifting ladles in the potential aluminum distribution solutions without waste tanks, the second determination module 400 includes:

[0183] A third determining unit is used to determine the moving distance of the overhead crane when aluminum is distributed according to the potential aluminum distribution scheme with the least number of lifting bags;

[0184] The fourth determination unit is used to determine that the potential aluminum distribution plan with the shortest moving distance is the optimal aluminum distribution plan.

[0185] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0186] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0187] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0188] The above is a detailed introduction to the electrolytic aluminum preparation method and device provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A method for preparing aluminum from electrolytic aluminum, characterized in that: include: According to the maximum number of electrolytic cells corresponding to a single ladle, the electrolytic cell selection coefficient, and the number of electrolytic cells to be prepared, the electrolytic cells to be prepared are combined to obtain a potential aluminum preparation scheme; the mixed aluminum liquid of each group of electrolytic cells to be prepared in each potential aluminum preparation scheme meets a preset standard, and the preset standard is that the weight of the mixed aluminum liquid is less than or equal to a preset weight threshold and the impurity content is less than or equal to a preset impurity content threshold; Determine whether there are waste tanks in all the potential aluminum-addition schemes; If all the potential aluminum-addition schemes have the waste tank, then the potential aluminum-addition scheme with the least number of waste tanks is determined to be the optimal aluminum-addition scheme; If not all of the potential aluminum distribution schemes have the waste tank, then the scheme with the least number of lifting ladles among the potential aluminum distribution schemes without the waste tank is determined as the optimal aluminum distribution scheme; Among them, according to the maximum number of electrolytic cells corresponding to a single ladle, the electrolytic cell selection coefficient, and the number of aluminum electrolytic cells to be equipped, the potential aluminum matching schemes obtained by combining the aluminum electrolytic cells to be equipped include: S11: grouping the aluminum reduction cells to be matched according to the selection coefficient of the aluminum reduction cells and the number of aluminum reduction cells to be matched, and obtaining all preset potential aluminum matching schemes; the target number of aluminum reduction cells to be matched in each group is equal to the maximum number of aluminum reduction cells corresponding to a single ladle; S12: Determine whether there are any unassembled remaining electrolytic cells in the preset potential aluminum distribution scheme; S13: If the remaining electrolytic cell does not exist in the preset potential aluminum preparation scheme, updating the preset potential aluminum preparation scheme to a potential aluminum preparation scheme; S14: If the remaining electrolytic cells exist in the preset potential aluminum-making scheme, the remaining electrolytic cells are used as new electrolytic cells to be made into aluminum, and step S11 is performed, wherein the new target quantity is the previous target quantity minus 1, until the aluminum liquid in one of the remaining electrolytic cells fails to meet the preset standard; The method for determining the electrolytic cell selection coefficient comprises: S31: determining the coefficient to be determined according to the sampling value and the maximum number of electrolytic cells corresponding to a single lifting bag; S32: Determine whether the undetermined coefficient is greater than 1; S33: If the undetermined coefficient is greater than 1, a new sampling value is selected and the process returns to step S31; S34: If the undetermined coefficient is not greater than 1, determine whether the sampled value meets a preset condition; the preset condition is that the sampled value is greater than or equal to 1 and less than or equal to a preset value, and the preset value is the maximum number of electrolytic cells corresponding to a single ladle plus 1; S35: If the sampled value satisfies the preset condition, determining the undetermined coefficient as the electrolytic cell selection coefficient; S36: If the sampling value does not meet the preset condition, a new sampling value is selected and the process returns to step S31 until the electrolytic cell selection coefficient is determined.

2. The method for preparing aluminum from electrolytic aluminum according to claim 1, characterized in that: The aluminum reduction cells to be prepared are grouped according to the selection coefficient of the reduction cells and the number of the aluminum reduction cells to be prepared, and all the preset potential aluminum preparation schemes are obtained, including: S21: Determine the number of the aluminum electrolytic cell to be equipped according to the electrolytic cell selection coefficient and the number of aluminum electrolytic cells to be equipped; S22: when the number of non-repeating serial numbers is equal to the target number, determining whether the mixed aluminum liquid to be prepared in the aluminum electrolytic cell corresponding to the target number meets the preset standard; S23: If the mixed aluminum liquid does not meet the preset standard, a new electrolytic cell selection coefficient is determined, and step S21 is executed until the mixed aluminum liquid meets the preset standard; S24: If the mixed aluminum liquid meets the preset standard, a group of combinations of the aluminum reduction cells to be prepared are determined; a new electrolytic cell selection coefficient is determined, and step S21 is executed until all the aluminum reduction cells to be prepared are combined to obtain a preset potential aluminum preparation scheme; S25: Determine a new electrolytic cell selection coefficient and execute step S21 until all preset potential aluminum formulation schemes are obtained.

3. The method for preparing aluminum from electrolytic aluminum according to claim 2, characterized in that: Determining the number of the aluminum electrolytic cell to be equipped according to the electrolytic cell selection coefficient and the number of the aluminum electrolytic cells to be equipped includes: Determine the product of the electrolytic cell selection coefficient and the number of aluminum electrolytic cells to be equipped; The integer part of the product is determined as the number.

4. The method for preparing aluminum from electrolytic aluminum according to claim 2, characterized in that: When the number of non-repeating serial numbers is equal to the target number, before judging whether the mixed aluminum liquid to be prepared in the aluminum electrolytic cell corresponding to the target number meets the preset standard, the method further includes: Determine whether the number is repeated; If the number is repeated, a new electrolytic cell selection coefficient is determined, and step S21 is executed until the number is not repeated; If the numbers are not repeated, the numbers are retained, and it is determined whether the number of retained numbers is equal to the target number; If the number of reserved numbers is not equal to the target number, a new electrolytic cell selection coefficient is determined, and step S21 is executed until the numbers are not repeated.

5. The method for preparing aluminum from electrolytic aluminum according to claim 1, characterized in that: The sampling values ​​are selected according to Gaussian distribution or average uniform distribution.

6. The method for preparing aluminum from electrolytic aluminum according to any one of claims 1 to 5, characterized in that: When there are multiple potential aluminum-addition schemes with the least number of waste tanks, determining the potential aluminum-addition scheme with the least number of waste tanks as the optimal aluminum-addition scheme includes: Determine the moving distance of the overhead crane when aluminum is distributed according to the potential aluminum distribution plan with the least amount of waste tanks; Determine the potential aluminum distribution plan with the shortest moving distance as the optimal aluminum distribution plan.

7. The method for preparing aluminum from electrolytic aluminum according to any one of claims 1 to 5, characterized in that: When there are multiple solutions with the least number of ladles among the potential aluminum distribution solutions without waste tanks, determining the solution with the least number of ladles among the potential aluminum distribution solutions without waste tanks as the optimal aluminum distribution solution includes: Determine the moving distance of the overhead crane when dispensing aluminum according to the potential aluminum dispensing scheme with the least number of each ladle; Determine the potential aluminum distribution plan with the shortest moving distance as the optimal aluminum distribution plan.

8. An electrolytic aluminum preparation device, characterized in that: include: A combination module, for combining the aluminum electrolytic cells to be prepared to obtain a potential aluminum preparation scheme according to the maximum number of electrolytic cells corresponding to a single lifting bag, the electrolytic cell selection coefficient, and the number of aluminum electrolytic cells to be prepared; the mixed aluminum liquid of each group of the aluminum electrolytic cells to be prepared in each potential aluminum preparation scheme meets a preset standard, and the preset standard is that the weight of the mixed aluminum liquid is less than or equal to a preset weight threshold and the impurity content is less than or equal to a preset impurity content threshold; The first judgment module is used to judge whether there are waste tanks in all the potential aluminum-matching schemes; A first determination module is used to determine that the potential aluminum distribution scheme with the least number of waste tanks is the optimal aluminum distribution scheme if all the potential aluminum distribution schemes have the waste tanks; A second determination module is used for determining, if not all of the potential aluminum distribution schemes have the waste tank, that the scheme with the least number of lifting ladles among the potential aluminum distribution schemes without the waste tank is the optimal aluminum distribution scheme; The combined module 100 includes: A grouping unit, used to execute S11: grouping the aluminum reduction cells to be equipped according to the selection coefficient of the aluminum reduction cells and the number of aluminum reduction cells to be equipped, to obtain all preset potential aluminum matching schemes; the target number of the aluminum reduction cells to be equipped in each group is equal to the maximum number of aluminum reduction cells corresponding to a single ladle; A judgment unit, used to execute S12: judging whether there are any uncombined remaining electrolytic cells in the preset potential aluminum distribution scheme; An updating unit, configured to execute S13: if the remaining electrolytic cells do not exist in the preset potential aluminum-addition scheme, updating the preset potential aluminum-addition scheme to a potential aluminum-addition scheme; A repeating unit for executing S14: if the remaining electrolytic cell exists in the preset potential aluminum-matching scheme, the remaining electrolytic cell is used as a new electrolytic cell to be matched with aluminum, and step S11 is executed, wherein the new target quantity is the previous target quantity minus 1, until the aluminum liquid in one of the remaining electrolytic cells fails to meet the preset standard; The electrolytic aluminum preparation device also includes: The third determination module is used to execute S31: determine the coefficient to be determined according to the sampled value and the maximum number of electrolytic cells corresponding to a single lifting bag; A second judgment module is used to execute S32: judging whether the undetermined coefficient is greater than 1; A setting module, used to execute S33: if the undetermined coefficient is greater than 1, select a new sampling value and return to step S31; A third judgment module is used to execute S34: if the undetermined coefficient is not greater than 1, then determine whether the sampled value meets a preset condition; the preset condition is that the sampled value is greater than or equal to 1 and less than or equal to a preset value, and the preset value is the maximum number of electrolytic cells corresponding to a single lifting bag plus 1; A fourth determination module is used to execute S35: if the sampled value satisfies the preset condition, determine the undetermined coefficient as the electrolytic cell selection coefficient; The repetition module is used to execute S36: if the sampling value does not meet the preset condition, a new sampling value is selected, and the process returns to step S31 until the electrolytic cell selection coefficient is determined.

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