Electromagnetic stirring control system for aluminum electrolytic smelting

Abstract

The utility model discloses an electromagnetic stirring control system for aluminum electrolysis smelting, relates to the technical field of aluminum electrolysis smelting, and mainly aims to monitor temperature, pressure and current changes of an aluminum electrolysis cell and adjust working parameters of electromagnetic stirring according to monitoring results. According to the main technical scheme, the electromagnetic stirring control system for aluminum electrolytic smelting comprises a PLC, a frequency converter, an electromagnetic stirring mechanism, a pressure sensor, a temperature measuring unit and a current sensor, the pressure sensor is arranged in an electrolytic tank, the current sensor is arranged on a current loop of the electrolytic tank, and the frequency converter is connected with the electromagnetic stirring mechanism. The detection end of the temperature measuring unit is connected to the side wall of the electrolytic tank, the electromagnetic stirring mechanism comprises a plurality of electromagnetic coils, the electromagnetic coils are arranged at the bottom and the side wall of the electrolytic tank respectively, the pressure sensor, the current sensor and the temperature measuring unit are connected to the input end of the PLC, and the output end of the PLC, the frequency converter and the electromagnetic stirring mechanism are sequentially connected.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum electrolytic smelting, in particular to an electromagnetic stirring control system used for aluminum electrolytic smelting. Background Art

[0002] Aluminum electrolysis is one of the main methods of producing aluminum at present. It produces pure aluminum by electrolyzing aluminum oxide in an electrolytic cell. However, during the electrolysis process, aluminum liquid often produces inhomogeneity due to factors such as temperature, fluidity, and uneven composition, which may lead to reduced product quality, reduced production efficiency, and increased equipment loss. In the traditional aluminum electrolysis process, in order to solve the problem of uneven aluminum liquid, manual stirring is usually used, that is, the aluminum liquid in the electrolytic cell is stirred by manual tools such as stirring rods. However, this method has the problem that manual stirring requires the operator to stir the electrolytic cell regularly, which is inefficient and easily affected by human factors. It cannot guarantee that each stirring can achieve a uniform effect, which easily causes local unevenness of the aluminum liquid. In addition, manual operation has certain safety risks. Operators need to be exposed to high temperature environments for a long time, which may cause safety hazards such as burns. Utility Model Content

[0003] In view of this, the utility model provides an electromagnetic stirring control system for aluminum electrolytic smelting, the main purpose of which is to monitor the temperature, pressure and current changes of the aluminum electrolytic cell, and adjust the working parameters of the electromagnetic stirring according to the monitoring results to achieve precise control of the stirring process of the aluminum electrolyte.

[0004] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0005] The utility model provides an electromagnetic stirring control system for aluminum electrolysis smelting, the system comprising: a PLC controller, a frequency converter, an electromagnetic stirring mechanism, a pressure sensor, a temperature measuring unit and a current sensor, the pressure sensor being arranged inside an electrolytic cell, the current sensor being arranged on a current loop of the electrolytic cell, a detection end of the temperature measuring unit being connected to a side wall of the electrolytic cell, the electromagnetic stirring mechanism comprising a plurality of electromagnetic coils, the plurality of electromagnetic coils being respectively arranged at the bottom and the side wall of the electrolytic cell, the pressure sensor, the current sensor and the temperature measuring unit being respectively connected to an input end of the PLC controller, and an output end of the PLC controller, the frequency converter and the electromagnetic stirring mechanism being connected in sequence.

[0006] The purpose of the utility model and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0007] Optionally, the temperature measurement unit includes a pulse light source, a wavelength division multiplexer, a photodiode, an amplifier circuit, a digital-to-analog conversion module, a reference optical fiber, an optical switch, a multimode optical fiber, and a high-speed data acquisition card. The output end of the pulse light source is connected to the input end of the wavelength division multiplexer, the first output end of the wavelength division multiplexer, the reference optical fiber, the optical switch and the multimode optical fiber are connected in sequence, the second output end of the wavelength division multiplexer, the photodiode, the amplifier circuit, and the input end of the digital-to-analog conversion module are connected in sequence, the first output end of the digital-to-analog conversion module is connected to the input end of the pulse light source, the input end of the high-speed data acquisition card is respectively connected to the second output end of the digital-to-analog conversion module and the reference optical fiber, the output end of the high-speed data acquisition card is connected to the input end of the PLC controller, and the output end of the PLC controller is respectively connected to the optical switch and the pulse light source.

[0008] Optionally, the pulse light source includes a laser and a fiber amplifier, the laser, the fiber amplifier and the input end of the wavelength division multiplexer are connected in sequence, and the first output end of the digital-to-analog conversion module and the output end of the PLC controller are respectively connected to the laser.

[0009] Optionally, the multimode optical fiber is laid outside the electrolytic cell.

[0010] Optionally, a touch screen is also included, and the touch screen is connected to the PLC controller.

[0011] Optionally, it also includes a power supply unit, which includes an air switch, a transformer and a rectifier connected in sequence, the transformer is also connected to a frequency converter and an electromagnetic stirring mechanism, and the rectifier is connected to the PLC controller, the pressure sensor, the temperature measuring unit and the current sensor.

[0012] By means of the above technical solution, the utility model has at least the following advantages:

[0013] When the system is in operation, the pressure sensor is arranged inside the electrolytic cell to monitor the pressure change of the electrolyte; the current sensor is connected to the current loop of the electrolytic cell to monitor the current intensity and direction of the electrolyte; the detection end of the temperature measuring unit is connected to the side wall of the electrolytic cell to monitor the temperature of each key position of the electrolytic cell; the pressure sensor, the current sensor and the temperature measuring unit provide monitoring result signals to the PLC controller, and the PLC controller uses this monitoring result signal as a basis to change the current of the electromagnetic coil of the electromagnetic stirring mechanism through the frequency converter, thereby changing the magnetic field intensity of the environment around the electrolytic cell, thereby changing the Ampere force on the electrolyte in the electrolytic cell, thereby disturbing the flow direction of the electrolyte, thereby achieving the purpose of controlling the electrolyte stirring process.

[0014] Electromagnetic stirring technology has become an effective way to solve the stirring problem of aluminum electrolytic smelting due to its advantages such as no need for mechanical contact and remote control. Electromagnetic stirring technology uses the principle of electromagnetic induction to generate a constant or changing magnetic field in the electrolytic cell, thereby inducing current in the aluminum liquid, and then producing a stirring effect. Compared with the traditional mechanical stirring method, electromagnetic stirring can achieve precise control of the stirring effect by adjusting the current size and direction, produce a uniform stirring effect, effectively improve the fluidity and composition uniformity of the aluminum liquid, and do not require manual intervention or mechanical contact, which reduces equipment loss and operation risks and improves production safety. In summary, the development of a control system for aluminum electrolytic smelting based on electromagnetic stirring technology can effectively solve the problems existing in the traditional manual stirring method, improve production efficiency and product quality, and has important application prospects and market demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of an electromagnetic stirring control system for aluminum electrolysis smelting provided by an embodiment of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the temperature measurement unit;

[0017] Figure 3 is a structural schematic diagram of a power supply unit;

[0018] Figure 4 Schematic diagram of the installation position of multimode optical fiber on the wall of the electrolytic cell.

[0019] The figure marks in the drawings of the specification include: PLC controller 1, frequency converter 2, electromagnetic stirring mechanism 3, pressure sensor 4, temperature measuring unit 5, current sensor 6, pulse light source 7, wavelength division multiplexer 8, photodiode 9, amplifier circuit 10, digital-to-analog conversion module 11, reference optical fiber 12, optical switch 13, multimode optical fiber 14, high-speed data acquisition card 15, laser 701, optical fiber amplifier 702, touch screen 16, power supply unit 17, air switch 1701, transformer 1702, rectifier 1703. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the specific implementation methods, structures, features and effects of the utility model application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] like Figure 1 As shown, an embodiment of the utility model provides an electromagnetic stirring control system for aluminum electrolysis smelting, which includes: a PLC controller 1, a frequency converter 2, an electromagnetic stirring mechanism 3, a pressure sensor 4, a temperature measuring unit 5 and a current sensor 6, wherein the pressure sensor 4 is arranged inside the electrolytic cell, the current sensor 6 is arranged on the current loop of the electrolytic cell, the detection end of the temperature measuring unit 5 is connected to the side wall of the electrolytic cell, the electromagnetic stirring mechanism 3 includes a plurality of electromagnetic coils, and the plurality of electromagnetic coils are respectively arranged at the bottom and the side wall of the electrolytic cell, the pressure sensor 4, the current sensor 6 and the temperature measuring unit 5 are respectively connected to the input end of the PLC controller 1, and the output end of the PLC controller 1, the frequency converter 2 and the electromagnetic stirring mechanism 3 are connected in sequence.

[0023] The working process of the electromagnetic stirring control system used for aluminum electrolysis smelting is as follows:

[0024] When the system is running, the pressure sensor 4 is arranged inside the electrolytic cell to monitor the pressure change of the electrolyte; the current sensor 6 is connected to the current loop of the electrolytic cell to monitor the current intensity and direction of the electrolyte; the detection end of the temperature measuring unit 5 is connected to the side wall of the electrolytic cell to monitor the temperature of each key position of the electrolytic cell; the pressure sensor 4, the current sensor 6 and the temperature measuring unit 5 provide monitoring result signals to the PLC controller 1, and the PLC controller 1 takes this monitoring result signal as a basis. The PLC controller 1 changes the current of the electromagnetic coil of the electromagnetic stirring mechanism 3 through the frequency converter 2, thereby changing the magnetic field intensity of the environment around the electrolytic cell, thereby changing the Ampere force on the electrolyte in the electrolytic cell, thereby disturbing the flow direction of the electrolyte, thereby achieving the purpose of controlling the electrolyte stirring process.

[0025] Electromagnetic stirring technology has become an effective way to solve the stirring problem of aluminum electrolytic smelting due to its advantages such as no need for mechanical contact and remote control. Electromagnetic stirring technology uses the principle of electromagnetic induction to generate a constant or changing magnetic field in the electrolytic cell, thereby inducing current in the aluminum liquid, and then producing a stirring effect. Compared with the traditional mechanical stirring method, electromagnetic stirring can achieve precise control of the stirring effect by adjusting the current size and direction, produce a uniform stirring effect, effectively improve the fluidity and composition uniformity of the aluminum liquid, and do not require manual intervention or mechanical contact, which reduces equipment loss and operation risks and improves production safety. In summary, the development of a control system for aluminum electrolytic smelting based on electromagnetic stirring technology can effectively solve the problems existing in the traditional manual stirring method, improve production efficiency and product quality, and has important application prospects and market demand.

[0026] like Figure 2As shown, in a specific embodiment, the temperature measuring unit 5 includes a pulse light source 7, a wavelength division multiplexer 8, a photodiode 9, an amplifier circuit 10, a digital-to-analog conversion module 11, a reference optical fiber 12, an optical switch 13, a multimode optical fiber 14, and a high-speed data acquisition card 15. The output end of the pulse light source 7 is connected to the input end of the wavelength division multiplexer 8, the first output end of the wavelength division multiplexer 8, the reference optical fiber 12, the optical switch 13 and the multimode optical fiber 14 are connected in sequence, the second output end of the wavelength division multiplexer 8, the photodiode 9, the amplifier circuit 10, and the input end of the digital-to-analog conversion module 11 are connected in sequence, the first output end of the digital-to-analog conversion module 11 is connected to the input end of the pulse light source 7, the input end of the high-speed data acquisition card 15 is respectively connected to the second output end of the digital-to-analog conversion module 11 and the reference optical fiber 12, the output end of the high-speed data acquisition card 15 is connected to the input end of the PLC controller 1, and the output end of the PLC controller 1 is respectively connected to the optical switch 13 and the pulse light source 7.

[0027] In this embodiment, specifically, the temperature measuring unit 5 is used to collect temperature signals and transmit the temperature signals to the PLC, and the PLC controls the electromagnetic stirring mechanism 3 to stir, thereby achieving real-time control and adjustment of the electromagnetic stirring mechanism 3 .

[0028] Specifically, after the acquisition program of the PLC host computer is started, the pulse light source 7 emits pulse light with a certain pulse width and repetition frequency, and the pulse light enters the wavelength division multiplexer 8, and then passes through the reference optical fiber 12. The function of the optical switch is to increase the sensing channel and transmission distance. The pulse light generates backward Raman scattering in the reference optical fiber 12, and the Raman scattered light will return to the Com end of the wavelength division multiplexer 8 along the reference optical fiber 12. The Raman scattered light is filtered into Stokes light and anti-Stokes light by the wavelength division multiplexer 8, and the two optical signals are transmitted to the photodiode 9. When the photodiode 9 detects two weak optical signals, it will perform photoelectric conversion and amplification processing on the Stokes light and the Anti-Stokes light, and finally transmit it to the high-speed data acquisition card 15, and the collected signals will be accumulated and stored, and finally the temperature curve will be displayed on the touch screen 16.

[0029] More specifically, the PLC communicates with the touch screen 16 via RS232, and the touch screen 16 sends control instructions to the PLC via the communication protocol. The high-speed data acquisition card 15 is used to perform digital-to-analog conversion and preprocess the signals, and convert the anti-Stokes light signal and the Stokes scattered light signal output by the photoelectric conversion module into digital signals and transmit them to the PLC. The multimode optical fiber 14 is installed at different positions on the side wall of the aluminum electrolytic cell to measure the temperature signal and monitor the temperature change of the aluminum liquid in real time; the pressure sensor 4 is arranged inside the aluminum electrolytic cell to monitor the pressure change of the aluminum liquid; the current sensor 6 is connected to the current loop of the aluminum electrolytic cell to monitor the current intensity and direction of the aluminum liquid; the PLC receives the control instructions and the temperature, pressure, and current signals to control the equipment and store the data in the internal memory of the PLC; the touch screen 16 serves as a human-computer interaction interface, allowing the operator to input control instructions and monitor the equipment status. Through the communication protocol, the touch screen 16 sends control instructions to the PLC, which include starting or stopping the equipment, adjusting process parameters, etc. At the same time, the touch screen 16 can also display feedback information from the PLC, such as equipment status, alarm information, real-time data and trend charts, etc.; the PLC will analyze the signal according to the preset control logic and the control instructions input by the operator through the touch screen 16 based on the parameters input by the user and the signals collected by the sensor, and calculate the corresponding stirring parameters according to the sensor data, and adjust the stirring parameters according to the actual situation. The electromagnetic coil set at the bottom or side wall of the electrolytic cell generates a constant or changing magnetic field in the aluminum electrolytic cell, disturbing the electrolyte in the electrolytic cell, thereby achieving a stirring effect and ensuring the uniformity and stability of the electrolyte. During the stirring of the electrolyte, the PLC will automatically perform the stirring operation according to the information input by the user to ensure the precise control of the production process.

[0030] After the stirring is completed, the touch screen 16 will record the important data of each stirring, such as temperature, current, voltage, time, etc., and send these data to the cloud server for storage. In this way, the operator can not only view the historical data and analysis report on the spot through the touch screen 16 device, but also remotely log in to the cloud server to monitor the stirring process and adjust the process parameters anywhere there is a network connection. The design of the entire system ensures the automation and high efficiency of the production process, while also improving the security and traceability of the data. The key to the utility model is to monitor the state of the aluminum liquid in real time through the sensor, and feed back the monitoring results to the control unit to achieve precise control of the electromagnetic stirring device. Compared with the traditional manual stirring method, the utility model has the advantages of high degree of automation, good stirring effect, simple operation, safety and reliability, etc., which can significantly improve the production efficiency and product quality of aluminum electrolytic smelting, reduce production costs, and has broad application prospects and market demand. In this way, enterprises can better manage production data, optimize production processes, improve product quality, and reduce production costs.

[0031] The beneficial effects of this system are as follows:

[0032] (1) The state of the electrolyte is monitored in real time by a sensor, and the monitoring result is fed back to the PLC controller 1. The control parameters are corrected according to the actual working state of the electromagnetic stirring mechanism 3 to achieve accurate control of the electromagnetic stirring intensity. Compared with the traditional manual stirring method, the utility model has the advantages of high automation, good stirring effect, simple operation, safety and reliability;

[0033] (2) The temperature of the aluminum electrolytic cell is monitored by the temperature measuring unit 5. It is only necessary to lay the optical fiber outside the electrolytic cell. The optical fiber can transmit signals in a strong magnetic field environment, which is more suitable for high-temperature monitoring of the aluminum electrolytic cell. Compared with the traditional monitoring method, it better overcomes the shortcomings of the traditional method, such as low degree of automation, great influence by environmental factors, unsafe and discontinuous measurement, difficult preservation of measurement data, and high labor cost.

[0034] (3) The electromagnetic stirring mechanism 3 uses the frequency converter 2 to adjust the stirring parameters according to the actual situation, meeting the stirring requirements under different process conditions and ensuring the uniformity and stability of the electrolyte stirring;

[0035] (4) It has the function of recording historical mixing data. The human-computer interaction device can send the data to the cloud server, and the operator can view it directly from the human-computer interaction device or the cloud.

[0036] like Figure 2 As shown, in a specific implementation, the pulse light source 7 includes a laser 701 and an optical fiber amplifier 702, the laser 701, the optical fiber amplifier 702 and the input end of the wavelength division multiplexer 8 are connected in sequence, and the first output end of the digital-to-analog conversion module 11 and the output end of the PLC controller 1 are respectively connected to the laser 701.

[0037] In this embodiment, specifically, when the acquisition program of the PLC controller 1 is started, the acquisition module is prompted to send a pulse trigger signal, triggering the laser 701 to emit pulse light with a certain pulse width and repetition frequency, which is amplified by the optical fiber amplifier 702 and enters the wavelength division multiplexer 8, and then enters the reference optical fiber 12.

[0038] like Figure 4 As shown, in a specific embodiment, the multimode optical fiber 14 is laid outside the electrolytic cell.

[0039] In this embodiment, the multimode optical fiber 14 is laid outside the electrolytic cell to obtain the temperature changes of the cell shell and the cell wall of the electrolytic cell.

[0040] like Figure 2 and Figure 4As shown, in a specific implementation, a touch screen 16 is also included, and the touch screen 16 is connected to the PLC controller 1.

[0041] In this embodiment, specifically, the touch screen 16 records important data of each electrolysis, such as temperature, current, voltage, time, etc., and sends these data to the cloud server for storage, solving the problem that the traditional electrolytic cell temperature monitoring and control mode is complicated, time-consuming and costly.

[0042] Specifically, the PLC communicates with the touch screen 16 via RS232, and the touch screen 16 sends control instructions to the PLC via the communication protocol.

[0043] The PLC receives control instructions and temperature signals, and stores the data in the PLC's internal memory; the touch screen 16 serves as a human-machine interface, allowing operators to input control instructions and monitor equipment status. Through the communication protocol, the touch screen 16 sends control instructions to the PLC, which include starting or stopping equipment, adjusting process parameters, etc. At the same time, the touch screen 16 can also display feedback information from the PLC, such as equipment status, alarm information, real-time data, and trend charts; the PLC analyzes the temperature signal based on the preset control logic and the control instructions input by the operator through the touch screen 16 according to the parameters entered by the user and the signal collected by the temperature measurement mechanism, and adjusts the temperature of the electrolytic cell used for the production of high-precision aluminum plate ingots accordingly. During the electrolytic aluminum process, the PLC automatically adjusts the current of the electrolytic cell according to the target temperature and time information entered by the user to ensure precise control of the production process.

[0044] The touch screen 16 includes two modes of human-computer interaction: automatic mode and manual mode. Each mode displays the real-time temperature information on the electrolytic cell for high-precision aluminum plate ingot production on the human-computer interaction interface, and can monitor the temperature change of the aluminum electrolytic cell for a long time and stably control the high temperature; in the automatic mode, the temperature control cabinet of the electrolytic cell for high-precision aluminum plate ingot production automatically sets the parameters according to the electrolytic aluminum information input by the user, and automatically sets the temperature and time for electrolytic aluminum operation; in the manual mode, the user needs to manually control the electrolytic cell for high-precision aluminum plate ingot production according to his own experience to electrolyze the aluminum located on the electrolytic cell, and control the temperature and time of electrolysis through the touch screen 16; after the electrolysis is completed, the touch screen 16 will record the important data of each electrolysis, such as temperature, current, voltage, time, etc., and send these data to the cloud server for storage. The touch screen 16 also includes emergency stop and historical data storage functions. In this way, the operator can not only view historical data and analysis reports on the spot through the touch screen 16 device, but also remotely log in to the cloud server to monitor the production process and adjust process parameters anywhere there is a network connection. The design of the entire system ensures the automation and high efficiency of the production process, while also improving the security and traceability of data. In this way, companies can better manage production data, optimize production processes, improve product quality, and reduce production costs.

[0045] like Figure 3 As shown, in a specific embodiment, it also includes a power supply unit 17, and the power supply unit 17 includes an air switch 1701, a transformer 1702 and a rectifier 1703 connected in sequence, the transformer 1702 is also connected to the frequency converter 2 and the electromagnetic stirring mechanism 3, and the rectifier 1703 is connected to the PLC controller 1, the pressure sensor 4, the temperature measuring unit 5 and the current sensor 6.

[0046] In this embodiment, the power supply unit 17 specifically includes an air switch 1701, a 380V to 220V AC transformer 1702, and a 220V AC to 24V DC rectifier 1703, wherein the transformer 1702 converts 380V AC into 220V AC to power the frequency converter 2 and the electromagnetic stirring mechanism 3, and the rectifier 1703 converts 220V AC into 24V DC to power the touch screen 16, the high-speed data acquisition card 15, the PLC controller 1, the temperature measurement unit 5, the pressure sensor 4, and the current sensor 6.

[0047] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An electromagnetic stirring control system for aluminum electrolysis smelting, characterized in that: include: A PLC controller, a frequency converter, an electromagnetic stirring mechanism, a pressure sensor, a temperature measuring unit and a current sensor, wherein the pressure sensor is arranged inside the electrolytic cell, the current sensor is arranged on the current loop of the electrolytic cell, the detection end of the temperature measuring unit is connected to the side wall of the electrolytic cell, the electromagnetic stirring mechanism includes a plurality of electromagnetic coils, and the plurality of electromagnetic coils are respectively arranged at the bottom and the side wall of the electrolytic cell, the pressure sensor, the current sensor and the temperature measuring unit are respectively connected to the input end of the PLC controller, and the output end of the PLC controller, the frequency converter and the electromagnetic stirring mechanism are connected in sequence.

2. The electromagnetic stirring control system for aluminum electrolysis smelting according to claim 1 is characterized in that: The temperature measurement unit includes a pulse light source, a wavelength division multiplexer, a photodiode, an amplifier circuit, a digital-to-analog conversion module, a reference optical fiber, an optical switch, a multimode optical fiber, and a high-speed data acquisition card. The output end of the pulse light source is connected to the input end of the wavelength division multiplexer, the first output end of the wavelength division multiplexer, the reference optical fiber, the optical switch, and the multimode optical fiber are connected in sequence, the second output end of the wavelength division multiplexer, the photodiode, the amplifier circuit, and the input end of the digital-to-analog conversion module are connected in sequence, the first output end of the digital-to-analog conversion module is connected to the input end of the pulse light source, the input end of the high-speed data acquisition card is respectively connected to the second output end of the digital-to-analog conversion module and the reference optical fiber, the output end of the high-speed data acquisition card is connected to the input end of the PLC controller, and the output end of the PLC controller is respectively connected to the optical switch and the pulse light source.

3. The electromagnetic stirring control system for aluminum electrolysis smelting according to claim 2 is characterized in that: The pulse light source comprises a laser and an optical fiber amplifier. The laser, the optical fiber amplifier and the input end of the wavelength division multiplexer are connected in sequence. The first output end of the digital-to-analog conversion module and the output end of the PLC controller are respectively connected to the laser.

4. The electromagnetic stirring control system for aluminum electrolysis smelting according to claim 2 or 3, characterized in that: The multimode optical fiber is laid outside the electrolytic cell.

5. The electromagnetic stirring control system for aluminum electrolysis smelting according to any one of claims 1 to 3, characterized in that: It also includes a touch screen, which is connected to the PLC controller.

6. The electromagnetic stirring control system for aluminum electrolysis smelting according to any one of claims 1 to 3, characterized in that: It also includes a power supply unit, which includes an air switch, a transformer and a rectifier connected in sequence. The transformer is also connected to a frequency converter and an electromagnetic stirring mechanism. The rectifier is connected to the PLC controller, the pressure sensor, the temperature measuring unit and the current sensor.

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