Method for measuring anode current distribution on line

Abstract

The invention relates to the technical field of metal electrolytic aluminum, and discloses a method for on-line measurement of anode current distribution, which comprises the following steps: S1, magnetic induction coils are installed, and the magnetic induction coils perpendicular to a magnetic field scheme are installed at the joints of a horizontal bus at the upper part of an electrolytic cell and each group of anode guide rods; s2, magnetic flux is generated, and the magnetic flux corresponding to the current is generated when the electrolysis production current is guided into the anode guide rod through the horizontal line on the upper portion of the electrolytic bath; s3, calculating data, detecting magnetic flux by the mounted magnetic induction coil, transmitting the detected numerical value to an intelligent control system, and calculating by the intelligent control system to obtain current data of each group of anode guide rods; and S4, a statistical table is generated, and the intelligent control system carries out statistics on the current data of each group of anode guide rods. According to the invention, the magnetic induction coil is arranged on the horizontal bus of the electrolytic cell, so that the current distribution of the anode guide rod of the electrolytic cell can be detected on line in real time, and measurement errors are avoided while the labor intensity of personnel is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of metal electrolytic aluminum, and specifically to a method for on-line measuring the anode current distribution. Background Technique

[0002] In the production process of electrolytic aluminum, the series current is connected through the upper structure horizontal busbar to multiple anode aluminum guide rods, and aluminum electrolysis reaction occurs between the anode carbon block and the cathode to produce electrolytic aluminum. At the same time, the current is led out to the next electrolytic cell through multiple cathode carbon block groups. Due to the particularity of the current direction during operation, a large amount of horizontal current will be generated in the melt area of the electrolytic cell. The horizontal current does not participate in the aluminum electrolysis reaction and affects the stability of electrolytic production, increasing the energy consumption of electrolytic aluminum.

[0003] When the current distribution changes, the anode current distribution is of great significance to electrolytic aluminum, mainly reflected in the following aspects:

[0004] 1) Affect the service life of the electrolytic cell: A uniform anode current distribution can reduce the temperature gradient and thermal stress in the electrolytic cell, reduce the risk of damage to the electrolytic cell, and thus extend the service life of the electrolytic cell.

[0005] 2) Affect the quality of primary aluminum: The uniformity of the anode current distribution will affect the flow of the electrolyte and the fluctuation of the aluminum liquid. The strengthening of the current in a local anode will cause changes in the magnetic field of the metal fluid in the local cell, resulting in fluctuations in the aluminum flow rate, affecting the normal production of the electrolytic cell, and in turn affecting the quality of primary aluminum.

[0006] 3) Affect the current efficiency: A uniform anode current distribution helps to improve the current efficiency and reduce energy consumption.

[0007] 4) Reflect the state of the electrolytic cell: By monitoring the anode current distribution, the operating state of the electrolytic cell can be understood, problems can be discovered in time and corresponding measures can be taken;

[0008] Currently, the electrolytic aluminum industry mostly adopts:

[0009] 1) Measuring fork method: Using a digital meter or a multimeter, the measuring fork is contacted with the anode guide rod, and the current distribution value is recorded after the reading is stable. This method is simple and intuitive, but attention needs to be paid to the correct connection method and shielding measures of the measuring fork. The disadvantage is that the accuracy is limited: there may be a certain measurement error, resulting in inaccurate current distribution data, affecting the accurate judgment of the operating state of the electrolytic cell, and at the same time, it cannot continuously monitor the current distribution in real time, there may be a monitoring interval, and it is difficult to capture instantaneous abnormal changes.

[0010] 2) Voltage probe method: By installing voltage probes on the anode rods, the voltage drop of the anode rods is measured, and then the current distribution is calculated. This method can achieve real-time monitoring, but the probes need to be calibrated and maintained. The disadvantage is that the accuracy is limited and it is easily affected by external electromagnetic interference, temperature changes, cell structure and other factors, making the measurement results unstable and unreliable.

[0011] 3) Equispaced voltage drop method: Install equidistant measurement points on the horizontal crossbeam busbar of the electrolytic cell, measure the equispaced voltage drop generated when the current passes through, and then indirectly calculate the anode current. This method does not require modification of the cell, but the measured data needs to be corrected considering the characteristics of the electrolytic cell, and the practicality is poor. Therefore, a method for on-line measuring the anode current distribution is proposed. Summary of the Invention

[0012] (1) Technical problems to be solved

[0013] Aiming at the deficiencies of the prior art, the present invention provides a method for on-line measuring the anode current distribution, which solves the problems of limited accuracy in measuring the anode current in the current aluminum electrolysis industry: there may be certain measurement errors, resulting in inaccurate current distribution data, affecting the accurate judgment of the operating state of the electrolytic cell, and poor practicality.

[0014] (2) Technical solutions

[0015] To achieve the above object, the present invention provides the following technical solutions:

[0016] A method for on-line measuring the anode current distribution, comprising the following steps:

[0017] S1: Install magnetic induction coils, and install magnetic induction coils perpendicular to the magnetic field direction at the junction of the upper horizontal busbar of the electrolytic cell and each group of anode rods;

[0018] S2: Generate magnetic flux, when the electrolysis production current is introduced into the anode rods through the upper horizontal line of the electrolytic cell, a magnetic flux corresponding to the current is generated;

[0019] S3: Calculate data, the installed magnetic induction coils detect the magnetic flux, and transmit the detected values to the intelligent control system. The intelligent control system calculates to obtain the current data of each group of anode rods;

[0020] S4: Generate a statistical table, the intelligent control system statistically processes the current data of each group of anode rods to generate a statistical table of the anode current distribution of the electrolytic cell.

[0021] As a further scheme of the present invention, in S3, the intelligent control system includes a communication module, a control module, a processing module and a calculation module, and the communication module communicates through CAN, and the control module includes a cell controller and a controller.

[0022] Further, in S3, the magnetic induction coil is connected to the cell controller through a power supply and CAN.

[0023] On the basis of the foregoing solution, in S4, the intelligent control system includes a statistical module, and the statistical module is connected to the calculation module.

[0024] Further, in S1, an anode is included. An anode guide is provided on the upper surface of the anode. A busbar electrolytic cell is connected to one side of the anode guide rod. A horizontal busbar is provided on the busbar electrolytic cell. A magnetic induction coil is provided at the joint of the lower surface of the busbar electrolytic cell and the anode guide rod. The magnetic induction coil is connected to a power supply, and the magnetic induction coil communicates with the cell controller through CAN.

[0025] (III) Beneficial effects

[0026] Compared with the prior art, the present invention provides a method for online measuring the anode current distribution, and has the following beneficial effects:

[0027] 1. In the present invention, by installing a magnetic induction coil on the horizontal busbar of the electrolytic cell, online real-time detection of the current distribution of the anode guide rod of the electrolytic cell can be realized, reducing the labor intensity of personnel and avoiding measurement errors at the same time.

[0028] 2. In the present invention, the detected values are transmitted to the intelligent control system, realizing real-time automatic upload of data and providing technical data support for electrolysis production. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 FIG. is a schematic flow chart of the steps of a method for online measuring the anode current distribution proposed by the present invention.

[0030] Figure 2 FIG. is a schematic structural diagram of partial components of a method for online measuring the anode current distribution proposed by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment 1

[0033] Referring to Figure 1 , a method for online measuring the anode current distribution includes the following steps:

[0034] S1: Install a magnetic induction coil. Install a magnetic induction coil perpendicular to the magnetic field scheme above the joint of the upper horizontal busbar of the electrolytic cell and each group of anode guide rods. By applying Ampere's law, installing a magnetic induction coil on the horizontal busbar of the electrolytic cell can achieve on-line real-time detection of the current distribution of the anode guide rods of the electrolytic cell, reducing the labor intensity of personnel and avoiding measurement errors at the same time;

[0035] S2: Generate magnetic flux. When the electrolysis production current is introduced into the anode guide rod through the upper horizontal line of the electrolytic cell, magnetic flux corresponding to the current is generated;

[0036] S3: Calculate data. The installed magnetic induction coil detects the magnetic flux and transmits the detected value to the intelligent control system. The intelligent control system calculates to obtain the current data of each group of anode guide rods, realizing real-time automatic upload of data and providing technical data support for electrolysis production. The intelligent control system in S3 includes a communication module, a control module, a processing module, and a calculation module. The communication module communicates through CAN. The control module includes a cell controller and a controller. In S3, the magnetic induction coil is connected to the cell controller through a power supply and CAN;

[0037] S4: Generate a statistical table. The intelligent control system statistically processes the current data of each group of anode guide rods to generate a statistical table of the anode current distribution of the electrolytic cell. The intelligent control system in S4 includes a statistical module, and the statistical module is connected to the calculation module.

[0038] Embodiment 2

[0039] Refer to Figure 1-2 , a method for on-line measuring the anode current distribution, including the following steps:

[0040] S1: Install a magnetic induction coil. Install a magnetic induction coil perpendicular to the magnetic field scheme below the joint of the upper horizontal busbar of the electrolytic cell and each group of anode guide rods. By applying Ampere's law, installing a magnetic induction coil on the horizontal busbar of the electrolytic cell can achieve on-line real-time detection of the current distribution of the anode guide rods of the electrolytic cell, reducing the labor intensity of personnel and avoiding measurement errors at the same time. S1 includes anode 1. An anode guide rod 2 is provided on the upper surface of anode 1. A busbar electrolytic cell 3 is connected to one side of anode guide rod 2. A horizontal busbar is provided on busbar electrolytic cell 3. A magnetic induction coil 4 is provided at the joint of the lower surface of busbar electrolytic cell 3 and anode guide rod 2. The magnetic induction coil 4 is connected to a power supply, and the magnetic induction coil 4 communicates with the cell controller through CAN;

[0041] S2: Generate magnetic flux. When the electrolysis production current is introduced into the anode guide rod through the upper horizontal line of the electrolytic cell, magnetic flux corresponding to the current is generated;

[0042] S3: Calculate data. The installed magnetic induction coil detects the magnetic flux and transmits the detected value to the intelligent control system. The intelligent control system calculates to obtain the anode rod current data for each group, realizing real-time automatic data upload and providing technical data support for electrolysis production. In S3, the intelligent control system includes a communication module, a control module, a processing module, and a calculation module. The communication module communicates via CAN. The control module includes a cell controller and a controller. In S3, the magnetic induction coil is connected to the cell controller through a power supply and CAN.

[0043] S4: Generate a statistical table. The intelligent control system statistically processes the anode rod current data for each group to generate a statistical table of the anode current distribution in the electrolytic cell. In S4, the intelligent control system includes a statistical module, and the statistical module is connected to the calculation module.

[0044] In the description of this article, it should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for online measurement of anode current distribution, characterized in that: The following steps are involved: S1: Install the magnetic induction coil, and install the magnetic induction coil perpendicular to the magnetic field scheme at the junction of the upper horizontal busbar of the electrolytic cell and each group of anode guide rods; S2: Generates magnetic flux. When the electrolytic production current is introduced into the anode guide rod through the upper horizontal line of the electrolytic cell, a magnetic flux corresponding to the current is generated; S3: Calculate data. The installed magnetic induction coil detects the magnetic flux and transmits the detected value to the intelligent control system. The intelligent control system performs calculations to obtain the current data of each group of anode guide rods. S4: Generate a statistical table. The intelligent control system collects statistics on each group of anode guide rod current data to generate a statistical table of electrolytic cell anode current distribution.

2. The method for online measurement of anode current distribution according to claim 1, characterized in that: The intelligent control system in S3 includes a communication module, a control module, a processing module and a computing module, and the communication module communicates via CAN, and the control module includes a slot control machine and a controller.

3. The method for online measurement of anode current distribution according to claim 2, characterized in that: The magnetic induction coil in S3 is connected to the slot control machine through a power supply and CAN.

4. The method for online measurement of anode current distribution according to claim 3, characterized in that: The intelligent control system in S4 includes a statistical module, and the statistical module is connected to the calculation module.

5. The method for online measurement of anode current distribution according to claim 1, characterized in that: The S1 comprises an anode (1), an anode guide (2) is provided on the upper surface of the anode (1), a busbar electrolytic cell (3) is connected to one side of the anode guide rod (2), a horizontal busbar is provided on the busbar electrolytic cell (3), a magnetic induction coil (4) is provided at the junction of the lower surface of the busbar electrolytic cell (3) and the anode guide rod (2), the magnetic induction coil (4) is connected to a power supply, and the magnetic induction coil (4) communicates with a cell control machine via CAN.

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