Method and device for accurately measuring and calculating net consumption of anode for aluminum electrolysis

Abstract

The invention discloses a method and a device for accurately measuring and calculating net consumption of an anode for aluminum electrolysis. Through two on-line automatic weighing devices and a set of code identification tracking technology, weighing of the assembled new pole and the cleaned assembled residual pole is completed at two weighing stations respectively, and in combination with the code identification tracking technology, the weight difference value of the assembled new pole and the cleaned assembled residual pole is obtained through automatic calculation. The anode loss measurement of each assembled anode in the electrolysis process is realized, and the electrolytic net consumption of each anode is calculated by combining the service time of the assembled anode in the tank. According to the method, on the premise that the anodes are not damaged, the electrolytic net consumption of each group of anodes is jointly and quantitatively calculated by weighing the weight of the assembled new anodes and cleaning the assembled residual anodes on line, calculating the obtained weight difference and combining the anode and guide rod information tracking technology and the service time of the upper groove, and the quality of the anodes is evaluated according to the value. Accurate information management can be carried out on the quality of the carbon anode for aluminum, and data support is provided for evaluating and improving the quality of the anode.

Description

Technical Field

[0001] The invention relates to a method and a device for accurately measuring the net consumption of anodes for aluminum electrolysis, belonging to the technical field of aluminum electrolysis. Background Art

[0002] In the electrolytic aluminum production process, the carbon anode for aluminum is the "heart" of the electrolytic cell. The quality of the carbon anode for aluminum is directly related to the stability of the electrolytic production process, and the most direct criterion for judging the quality of the anode is the net anode consumption. Scientifically and accurately calculating the net anode consumption is an urgent issue for aluminum electrolytic production companies, which determines the selection of anode suppliers and the comprehensive evaluation of production costs.

[0003] The preparation process of assembled anodes is very long, mainly including raw material warehouse, calcination, batching, kneading, molding, roasting, assembly and other links. The production technical parameters and control conditions of each link will affect the quality of the assembled anodes. At present, the net consumption of anode electrolysis is basically estimated by the assembly volume and the pole-changing cycle, and it is impossible to evaluate the quality of each anode or even each batch. The adjustment of the pole-changing cycle and the selection of anode suppliers cannot be tracked in time. Therefore, the accurate measurement of the net consumption of anodes for aluminum electrolysis is of great significance to improving anode quality, optimizing the pole-changing cycle, and reducing production costs.

[0004] The reason why it is impossible to evaluate the quality of each anode or even each batch of anodes is that the anode information tracking technology is almost blank in China at present, and the anodes will be consumed during use. There is a large amount of covering material on the top of the consumed residual anodes, which brings great difficulties and uncertainty to the anode information tracking. Seeking an efficient method to track the anode information has become an insurmountable key point in anode quality evaluation.

[0005] At present, the information tracking of the guide rods in the assembly workshop is mainly carried out by painting or stamping, which is only a rough management of the number of guide rods. There is no effective management system for the huge number of guide rods, and it is impossible to effectively manage the detailed information of each guide rod. This also leads to the fact that key information including guide rod distribution, guide rod maintenance quality, guide rod service life, etc. is incomplete or even missing. This also makes it impossible to realize the information tracking of anodes through the existing guide rod information tracking technology. Summary of the invention

[0006] The purpose of the present invention is to provide a method and device for accurately measuring the net consumption of anodes for aluminum electrolysis. Without destroying the anode, the net consumption of each group of anodes can be quantitatively calculated by weighing the weight of the assembled new anode and the cleaned assembled residual anode online, combining the anode and guide rod information tracking technology and the service time of the upper tank, and using this value to evaluate the quality of the anode.

[0007] The technical solution of the present invention is a method for accurately measuring the net consumption of anodes for aluminum electrolysis, through two online automatic weighing devices and a set of coding and identification tracking technology, one online automatic weighing device is installed on the catenary corridor between the new electrode cleaning station and the loading and unloading station, and the other online automatic weighing device is installed on the catenary corridor between the electrolyte cleaning station and the residual electrode pressing and removing station, and the assembled new electrode and the clean assembled residual electrode are weighed at the two weighing stations respectively, and combined with the coding and identification tracking technology, the weight difference between the assembled new electrode and the clean assembled residual electrode is automatically calculated to achieve the measurement of the anode loss of each assembled anode during the electrolysis process, and the net consumption of electrolysis of each anode is calculated in combination with the service time of the assembled anode in the tank.

[0008] In the aforementioned method for accurately calculating the net consumption of anodes for aluminum electrolysis, limit stops with in-position signals are provided at two weighing stations to respectively complete the weighing of assembled new electrodes and clean assembled residual electrodes.

[0009] In the aforementioned method for accurately calculating the net consumption of anodes for aluminum electrolysis, the weighing of the assembled new anodes and the clean assembled residual anodes are both completed online on the catenary.

[0010] In the aforementioned method for accurately measuring the net consumption of anodes for aluminum electrolysis, the weighing method is specifically as follows: after the limit stopper senses that the assembled new pole or the clean assembled residual pole is in place, it stops it directly above the online automatic weighing device, and reads the guide rod code corresponding to the assembled new pole or the clean assembled residual pole through a coding identification device based on coding identification tracking technology. At the same time, the hydraulic station of the online automatic weighing device starts to drive the hydraulic cylinder to lift until the weighing tray contacts the bottom palm of the assembled new pole or the clean assembled residual pole, and continues to lift. The weighing sensor starts to weigh the assembled new pole or the clean assembled residual pole until the weighing value no longer changes. At this time, the hydraulic cylinder stops lifting, and the online automatic weighing device records the weight of the assembled new pole or the clean assembled residual pole. Then the hydraulic station starts to drive the hydraulic cylinder to descend. After it descends into place, the limit stopper opens to release the assembled new pole or the clean assembled residual pole. This is repeated to complete the automatic weighing of each assembled new pole or clean assembled residual pole.

[0011] A device for accurately measuring the net consumption of anodes for aluminum electrolysis includes two online automatic weighing devices, each of which is also provided with a coding identification device. One of the online automatic weighing devices is installed on the catenary corridor between the new anode cleaning station and the loading and unloading station, and the other online automatic weighing device is installed on the catenary corridor between the electrolyte cleaning station and the residual anode pressing and removing station.

[0012] In the device used in the aforementioned method for accurately measuring the net consumption of anodes for aluminum electrolysis, a limit stopper with a position signal is also arranged directly above each online automatic weighing device.

[0013] In the device used in the aforementioned method for accurately measuring the net consumption of anodes for aluminum electrolysis, the online automatic weighing device includes a hydraulic station, the hydraulic station is connected to a hydraulic cylinder, and the top of the push rod of the hydraulic cylinder is connected to a weighing tray via a weighing sensor.

[0014] Beneficial effects of the present invention: Compared with the prior art, the present invention sets two online automatic weighing devices and combines the coding identification tracking technology. The online automatic weighing devices can respectively complete the weighing of the assembled new poles and the clean assembled residual poles, and by adopting the coding identification tracking technology, the automatic matching of the assembled new poles and the clean assembled residual poles can be achieved, so as to automatically calculate the weight difference between the assembled new poles and the clean assembled residual poles, and combine the service time of the assembled anode upper tank to accurately calculate the net consumption of electrolysis of each anode. By accurately calculating the net consumption of each anode, the upper tank quality of the carbon anode for aluminum can be quantitatively evaluated, and the quality of the carbon anode for aluminum can be accurately managed, providing data support for evaluating and improving the anode quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the installation of the device of the present invention in an assembly workshop; Figure 2 It is a structural schematic diagram of the assembly of the new extreme online automatic weighing device of the present invention; Figure 3 It is a structural schematic diagram of the online automatic weighing device for assembled residual poles of the present invention; Figure 4 It is a structural schematic diagram of the online automatic weighing device of the present invention.

[0016] Figure numerals: 1-online automatic weighing device, 2-coding identification device, 3-limit stopper with in-position signal, 4-hydraulic station, 5-hydraulic cylinder, 6-weighing sensor, 7-weighing tray. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0018] An embodiment of the present invention: A method for accurately measuring the net consumption of anodes for aluminum electrolysis, through two online automatic weighing devices 1 and a set of coding and identification tracking technology, one online automatic weighing device 1 is installed on the catenary corridor between the new electrode cleaning station and the loading and unloading station, and the other online automatic weighing device 1 is installed on the catenary corridor between the electrolyte cleaning station and the residual electrode pressing and removing station, and the assembled new electrode and the clean assembled residual electrode are weighed at the two weighing stations respectively, and combined with the coding and identification tracking technology, the weight difference between the assembled new electrode and the clean assembled residual electrode is automatically calculated to achieve the measurement of the anode loss of each assembled anode during the electrolysis process, and the net consumption of electrolysis of each anode is calculated in combination with the service time of the assembled anode in the tank.

[0019] The coding identification tracking technology based on anodes and guide rods used in the present invention adopts the related technology independently developed by our company. The technology is detailed in the patent with application number CN202210877238.7 and patent name: A kind of carbon anode identification equipment and method for aluminum. The anode information is paired with the guide rod information after ferrophosphorus casting, and the paired anode information is assigned to the guide rod number to realize the one-to-one correspondence between the anode and the guide rod. The coding identification tracking technology is used to identify the guide rod number. Even if the anode is consumed and there is a large amount of covering material, it is also possible to know which anode the guide rod corresponds to. An online automatic weighing device 1 is arranged in the catenary corridor between the new pole cleaning station and the loading and unloading station to weigh the assembled new pole and record the weight information of each group of assembled new poles. An online automatic weighing device 1 is arranged in the catenary corridor between the electrolyte cleaning station and the residual pole pressing and removing station to weigh the clean assembled residual pole and record the weight information of each group of assembled residual poles. Combined with the service time of the newly assembled anode tank, the net electrolysis consumption of each group of anodes can be calculated. The calculation method is shown in the following formula:

[0020] Where: m 净耗 is the net consumption of anode electrolysis, kg / (t·Al); M 新极 Weight of the new pole for assembly, kg; M 残极 is the weight of the assembled residual pole, kg; m 铝 is the aluminum production per anode per day, t / d; d 阳极 The length of time the anode is in service.

[0021] Limit stops 3 with in-place signals are provided at two weighing stations to respectively complete the weighing of the assembled new poles and the clean assembled residual poles. When the assembled new poles and the clean assembled residual poles are transported to the weighing station, the assembled new poles and the clean assembled residual poles are automatically stopped by the limit stops 3 with in-place signals, which facilitates the weighing of the assembled new poles and the clean assembled residual poles through the online automatic weighing device 1.

[0022] The weighing of the assembled new poles and the clean assembled residual poles is completed online on the catenary. There is no need to remove the assembled new poles and the clean assembled residual poles from the catenary, so weighing is convenient. After weighing, the assembled new poles and the clean assembled residual poles can be quickly transported to the next process through the catenary for processing.

[0023] The weighing method is specifically as follows: the assembled new pole is transported to the limit stopper 3 with an in-place signal above the online automatic weighing device 1 of the assembled new pole weighing station through the catenary system. The limit stopper 3 with an in-place signal senses that the assembled new pole is in place and stops it directly above the online automatic weighing device 1. At this time, the coding identification device 2 based on the coding identification tracking technology reads the guide rod code of the assembled new pole, and the coding identification tracking system can match the assembled new pole corresponding to the guide rod. At the same time, the hydraulic station 4 starts to drive the hydraulic cylinder 5 to lift until the weighing tray 7 contacts the bottom palm of the assembled new pole, and continues to lift. The weighing sensor 6 starts to weigh the assembled new pole until the weighing value no longer changes. At this time, the hydraulic cylinder 5 stops lifting, and the online automatic weighing device 1 records the weight of the assembled new pole. Then the hydraulic station 4 starts to drive the hydraulic cylinder 5 to descend. After it descends into place, the limit stopper 3 with an in-place signal opens to release the assembled new pole. This is repeated to complete the automatic weighing of each assembled new pole.

[0024] The assembled butt pole is transported to the limit stopper 3 with an in-place signal above the online automatic weighing device 1 of the assembled butt pole weighing station through the catenary system. The limit stopper 3 with an in-place signal senses that the assembled butt pole is in place and stops it just above the online automatic weighing device 1. At this time, the coding identification device 2 based on the coding identification tracking technology reads the guide rod code of the assembled butt pole, and the coding identification tracking system can match the assembled butt pole corresponding to the guide rod, so as to match the assembled butt pole with the assembled new butt pole. At the same time, the hydraulic station 4 starts to drive the hydraulic cylinder 5 to lift until the weighing tray 7 contacts the bottom palm of the assembled butt pole, and continues to lift. The weighing sensor 6 starts to weigh the assembled butt pole until the weighing value no longer changes. At this time, the hydraulic cylinder 5 stops lifting, and the online automatic weighing device 1 records the weight of the assembled butt pole. Then the hydraulic station 4 starts to drive the hydraulic cylinder 5 to descend. After it is lowered into place, the limit stopper 3 with an in-place signal opens to release the assembled butt pole. This is repeated to complete the automatic weighing of each assembled butt pole.

[0025] A device for accurately measuring the net consumption of anodes for aluminum electrolysis includes two online automatic weighing devices 1, each of which is also provided with a coding identification device 2, wherein one online automatic weighing device 1 is installed on the catenary corridor between the new anode cleaning station and the loading and unloading station, and the other online automatic weighing device 1 is installed on the catenary corridor between the electrolyte cleaning station and the residual anode pressing and removing station. A limit stopper 3 with an in-position signal is also provided directly above each online automatic weighing device 1.

[0026] The online automatic weighing device 1 and the coding identification device 2 are both connected to the net consumption calculation system of the anode for aluminum electrolysis, and the collected data are fed back to the net consumption calculation system of the anode for aluminum electrolysis. The net consumption calculation system of the anode for aluminum electrolysis automatically matches the corresponding anode according to the guide rod code fed back by the coding identification device 2. After the data obtained by the two online automatic weighing devices 1 are fed back to the net consumption calculation system of the anode for aluminum electrolysis, the net consumption calculation system of the anode for aluminum electrolysis matches the weighing data with the corresponding anode, and calculates the net consumption of electrolysis of each group of anodes by comparing the measured data of the weighing part, thereby quantitatively evaluating the upper tank quality of each group of anodes.

[0027] The online automatic weighing device 1 includes a hydraulic station 4 , which is connected to a hydraulic cylinder 5 , and a top end of a push rod of the hydraulic cylinder 5 is connected to a weighing tray 7 via a weighing sensor 6 .

Claims

1. A method for accurately calculating the net consumption of anodes for aluminum electrolysis, characterized in that: By means of two online automatic weighing devices (1) and a set of coding identification tracking technology, one online automatic weighing device (1) is installed on the catenary corridor between the new anode cleaning station and the loading and unloading station, and the other online automatic weighing device (1) is installed on the catenary corridor between the electrolyte cleaning station and the residual anode pressing and removing station, the assembled new anode and the clean assembled residual anode are weighed at the two weighing stations respectively, and the weight difference between the assembled new anode and the clean assembled residual anode is automatically calculated in combination with the coding identification tracking technology, so as to measure the anode loss of each assembled anode during the electrolysis process, and the net electrolysis consumption of each anode is calculated in combination with the service time of the assembled anode in the tank.

2. The method for accurately calculating the net consumption of anodes for aluminum electrolysis according to claim 1, characterized in that: Limit stoppers (3) with in-position signals are arranged at two weighing stations to respectively complete the weighing of the assembled new pole and the cleaned assembled residual pole.

3. The method for accurately calculating the net consumption of anodes for aluminum electrolysis according to claim 1, characterized in that: The weighing of the assembled new pole and the clean assembled residual pole is completed online on the catenary.

4. The method for accurately calculating the net consumption of anodes for aluminum electrolysis according to claim 2, characterized in that: The weighing method is specifically as follows: after the limit stopper (3) with an in-place signal senses that the assembled new pole or the clean assembled residual pole is in place, it stops it just above the online automatic weighing device (1), and reads the guide rod code corresponding to the assembled new pole or the clean assembled residual pole through the coding identification device (2) based on the coding identification tracking technology. At the same time, the hydraulic station (4) of the online automatic weighing device (1) starts to drive the hydraulic cylinder (5) to lift until the weighing tray (7) contacts the bottom of the assembled new pole or the clean assembled residual pole, and continues to lift. The weighing sensor (6) starts to weigh the assembled new pole or the clean assembled residual pole until the weighing value no longer changes. At this time, the hydraulic cylinder (5) stops lifting, and the online automatic weighing device (1) records the weight of the assembled new pole or the clean assembled residual pole. Then, the hydraulic station (4) starts to drive the hydraulic cylinder (5) to descend. After it descends into place, the limit stopper (3) with an in-place signal opens to release the assembled new pole or the clean assembled residual pole. This is repeated to complete the automatic weighing of each assembled new pole or clean assembled residual pole.

5. A device for accurately calculating the net consumption of anodes for aluminum electrolysis according to any one of claims 1 to 4, characterized in that: The invention comprises two online automatic weighing devices (1), each of which is also provided with a coding identification device (2), wherein one online automatic weighing device (1) is installed on the catenary corridor between the new electrode cleaning station and the loading and unloading station, and the other online automatic weighing device (1) is installed on the catenary corridor between the electrolyte cleaning station and the residual electrode pressing and removing station.

6. The device used in the method for accurately calculating the net consumption of anodes for aluminum electrolysis according to claim 5, characterized in that: A limit stopper (3) with an in-position signal is also arranged directly above each online automatic weighing device (1).

7. The device used in the method for accurately calculating the net consumption of anodes for aluminum electrolysis according to claim 5, characterized in that: The online automatic weighing device (1) comprises a hydraulic station (4), the hydraulic station (4) is connected to a hydraulic cylinder (5), and the top end of a push rod of the hydraulic cylinder (5) is connected to a weighing tray (7) via a weighing sensor (6).

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