JP3180902B2 - Abnormal electrode detection method and abnormal electrode detection system in electrolytic smelting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a system for detecting an abnormal electrode in electrolytic smelting for identifying and detecting an abnormal position of an electrode plate.

[0002]

2. Description of the Related Art First, an outline of an electrolytic smelting facility will be described (see FIG. 7). The electrolytic cell 30 is a rectangular parallelepiped tank opened upward, and a common conductor 32 (bus bar) is provided on the upper surface of the long side wall 30c. As shown best in FIG. 6, a plurality of electrolyzers 30 are installed adjacent to each other in the vertical and horizontal directions, and the total number thereof is several hundred. The electrolytic solution in each electrolytic cell 30 includes a plurality (typically, 2
The cathode seed plate (cathode plate) K and the anode eared type (anode plate) A of about 0 to 50 sheets) are alternately and parallelly immersed. Each cathode plate K is suspended from a cathode support rod (crossbar) 34. Both ends of the cross bar 34 and the ears of the anode plate A are connected to the upper surface of one of the left and right electrolytic cell side walls 30c and the other electrolytic cell side wall 30c.
c, each of which is supported by a common conductor 32 provided therein.

In the Walker-type current supply system shown in FIG. 6, a total of four electrolytic cells 30 each having two rows and columns are used as a set so that current flows from all anode plates A to all cathode plates K of each electrolytic cell 30. It is wired to. As a power source for electrolytic smelting, a low voltage, a large current is required, and a large capacity voltage can be adjusted according to the conditions of the electrolytic operation while having a large capacity, so a thyristor type or diode type semiconductor rectifier is used. Can be

Factors that hinder normal operation in such electrolytic smelting include generation of dendrites and bumps on the cathode surface, curvature of the cathode, and bridging by large anode fragments. For example, if bumps are locally generated on the cathode surface and become enlarged, the anode plate A and the cathode plate K are short-circuited (short-circuit), and the electrolytic current is concentrated on the short-circuited portion. (See FIGS. 5A and 5B). The inspection tank work to find such abnormalities is carried out by the worker walking on the electrolytic tank every day, but the inspection area is enormous and requires a great deal of labor. This was also a cause of inducing positional displacement of the electrode plate due to walking on the top.

[0005]

As a method for finding these abnormalities, there are a method for measuring an electric current flowing through a cathode supporting rod (crossbar) and an ear of an anode, and a method for detecting the abnormalities. There is a method of measuring abnormalities using an infrared sensor focusing on the local rise of
In the former method, it is difficult to directly measure and monitor the fluctuation of the current itself in terms of accuracy, and in the latter method, it is difficult to accurately detect the temperature from the heat retaining sheet covered on the electrolytic cell. It takes a long time for the temperature of the short-circuit portion to increase, and thus cannot be detected early. In addition, there is a problem that it is not possible to detect an abnormality in which no current flows through the electrode plate (poor contact, passivation).

Therefore, the present invention utilizes the fact that there is a fixed relationship between the increase and decrease of the current and the change of the magnetic flux, and measures the magnetic flux density of the cathode plate K and the anode plate A using a magnetic sensor to measure the change of the current. It is an object of the present invention to provide a method of detecting an abnormality of an electrode plate that can identify an abnormal position of the electrode plate by detecting the abnormality, and to provide an abnormality detection system for implementing the method. It is another object of the present invention to provide a system that can automatically measure magnetic flux at night or while no work is being performed.

[0007]

According to a first aspect of the present invention, there is provided an electrolysis tank containing an electrolytic solution, comprising a conductor fixed to upper surfaces of both side walls of the electrolyzer opposite to each other. The cathode plate on the cathode side and the anode plate on the anode side are alternately immersed in a conductively supported state, and the vicinity of the contact point between the conductor and the plurality of cathode plates and between the conductor and the plurality of anode plates A method for detecting an abnormal electrode in electrolytic smelting, in which an abnormal position of an electrode plate is specified and detected by measuring magnetism in the vicinity of a contact point, wherein a lifting device is hung up and down on a horizontally movable overhead crane. In the process of lowering and hanging equipment,
A step of mounting the mounting frame so as to be swingable and linearly movable about the longitudinal direction of the mounting frame, a step of arranging a plurality of magnetic detection devices on the mounting frame, and operating the overhead moving crane to operate the hanging device. A step of measuring the magnetism by moving the magnetism detector above the target electrolytic cell, lowering the magnetism detector, and positioning the magnetism detector near the contact point between each cathode plate or each anode plate supported by the conductor, and a hanging device Rise,
After swinging and linearly moving the mounting frame, lowering the hanging device so that each magnetic detection device is located in the vicinity of each anode plate or each cathode plate and the contact point on the opposite side, and measuring the magnetism. It is configured with.

According to a second aspect of the present invention, there is provided a method for detecting an abnormal electrode in electrolytic smelting according to the first aspect, further comprising the step of detecting a current value measured by a magnetic detector. Processing the data and transmitting it to an output device provided in a control room isolated from the place where the electrolytic cell is installed; and printing out and / or displaying on a monitor based on the transmitted processing data. And a process.

According to a third aspect of the present invention, there is provided a method for detecting abnormal electrodes in electrolytic smelting according to the first or second aspect, wherein a signal transmission of magnetic data from a data processing device is provided. Is performed by wired optical communication using an optical fiber or wireless communication using a high frequency.

In order to solve the above-mentioned problems, the present invention according to a fourth aspect of the present invention is directed to an electrolytic cell in which an electrolytic solution is stored, and a cathode fixed to a cathode side of a conductor fixed on upper surfaces of both side walls opposite to each other. The plates are alternately immersed on the anode side while the anode plates are supported conductively, and the magnetism near the contact between the conductor and multiple cathode plates and near the contact between the conductor and multiple anode plates is measured. An abnormal electrode detection system in electrolytic smelting that identifies and detects an abnormal position of an electrode plate by performing a horizontally movable overhead traveling crane, and a hanging device suspended by the overhead traveling crane. And a mounting frame attached to the hanging device so as to be swingable and linearly movable, and a plurality of magnetic detecting means disposed on the mounting frame.

According to a fifth aspect of the present invention, there is provided a system for detecting an abnormal electrode in electrolytic smelting according to the fourth aspect, wherein the magnetic detecting means comprises a fluxgate magnetometer. It is characterized by having been done.

According to a sixth aspect of the present invention, there is provided a system for detecting an abnormal electrode in electrolytic smelting according to the fourth or fifth aspect, wherein a current value measured by a magnetic detector is used. Data processing, a data processing device to be transmitted to an output device provided in a control room isolated from the place where the electrolytic cell is installed, and an abnormal state is detected based on processing data from the data processing device, And an output device for printing out and / or displaying on a monitor.

According to a seventh aspect of the present invention, there is provided a system for detecting an abnormal electrode in electrolytic smelting according to any one of the fourth to sixth aspects. And a means for automatically measuring the magnetism, which is located near the contact point between each cathode plate or each anode plate supported by the conductor.

In order to solve the above-mentioned problems, the present invention according to claim 8 is directed to a system for detecting an abnormal electrode in electrolytic smelting according to claim 7, further comprising a system for switching between normal operation and automatic operation. A changeover switch, and a control device for preselecting an electrolytic cell for detecting an abnormal electrode among the electrolytic cells, the control device being operated at night or for the electrolytic cell preselected by the control device. It is characterized in that the measurement of magnetism is performed automatically during the absence.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a method for detecting an abnormal electrode in electrolytic smelting according to the present invention and a system for implementing the method will be described in detail based on the illustrated preferred embodiments. FIG. 1 is a schematic perspective view showing one embodiment of a system for implementing a method for detecting an abnormal electrode in electrolytic smelting according to the present invention.

Electrolyzers 3 for refining Cu arranged in large numbers
Numeral 0 denotes a tank for storing an electrolytic solution such as dilute sulfuric acid, which is entirely fixed on a frame and is placed on the floor so that the plurality of legs 35 do not rattle. In each electrolytic cell 30, an anode plate A as an anode electrode and a cathode plate K as a cathode electrode are alternately supported and arranged in parallel. The positioning means 20 is attached to the upper side of the electrolytic cell 30.

The overhead moving crane 18 is provided with a plurality of electrolytic cells 30 arranged in parallel in a vertical direction X or a horizontal direction Y (in FIG. 1, only a plurality of electrolytic cells 30 are drawn continuously in the horizontal direction Y).
The apparatus has a slide body 18c that moves in the X-axis direction on a rail 18b, and a motor 18a is installed on the slide body 18c. Rail 1
8b is laid in a frame (not shown), and the frame moves in the Y-axis direction. A pair of first cylindrical guide members 18d each having a flared expansion portion are attached to the lower surface of the slide body 18c, and a suspension member 16 that can be moved up and down by a first wire 16b is suspended. Has been lowered.

On the upper surface of the suspension member 16, a pair of first guide rods 16a are nested inside a first cylindrical guide member 18d. This is to prevent the suspended member 16 suspended by the inertial force from swinging when the overhead movable crane 18 is horizontally moved. On the lower surface of the suspension member 16, a pair of cylindrical second cylindrical guide members 16d whose lower ends are flared are attached, and the hanging device 15 is
It is suspended by the second wire 15b so as to be able to move up and down. In this embodiment, the suspension member 16 is interposed between the overhead moving crane 18 and the hanging device 15 in order to move the hanging device 15 while avoiding obstacles on the electrolytic cell 30. Of course, the present invention is not limited to this, and the hoisting device 15 may be directly attached to the overhead movable crane 18.

On the upper surface of the hanging device 15, a pair of second guide rods 15a are nested and mounted inside a second cylindrical guide member 16d. This is to prevent the swinging of the hanging device 15 when the overhead moving crane 18 is horizontally moved as described above. This second
The upper end of the guide rod 15a is flared by the second tubular guide member 16d immediately after the position guide means 10 starts engaging with the positioning means 20 by the hanging device 15 reaching the predetermined position and descending. It is designed to be located at a portion that has been expanded in the shape of a circle. Until the engagement between the position guide means 10 and the positioning means 20 is completed, the second guide rod 15
The upper end portion a can move inside the flared portion of the second cylindrical guide member 16d. Position guide means 10 for engaging with positioning means 20 provided on the upper side surface of the electrolytic cell 30 is attached to both side surfaces of the hanging device 15 (not shown in FIG. 2).

A mounting shaft 15c is mounted on the lower surface of the hanging device 15 in the longitudinal direction (X-axis direction), and the magnetic sensor mounting frame 15d swings around the mounting shaft 15c and moves linearly in the longitudinal direction. Mounted as possible. In order to measure the magnetism on the cathode K side or the anode A side at a time, the magnetic sensor mounting frame 15 is used.
A plurality of magnetic sensors 13 are installed at d. Here, such a structure is employed, as shown in FIG.
Both ends of the crossbar 34 and the ears of the anode plate A are supported by the common conductor 32 provided on the upper surface of one of the left and right electrolytic cell side walls 30c and the other electrolytic cell side wall 30c. The location where the magnetic flux is measured and the location where the magnetic flux of the anode A is measured need to be measured at the opposing side walls 30c of the electrolytic cell. Hanging equipment 1
5 shows a sensor for measuring the magnetic flux of the cathode K and the anode A
It is also possible to attach sensors for measuring the magnetic flux of the magnetic sensor 13 respectively, but the number of attachments of the magnetic sensor 13 is approximately doubled, which increases the cost and increases the weight, which is not preferable. Therefore, a mounting shaft 15c that can swing in the X-axis direction is provided, a magnetic sensor mounting frame 15d is mounted on the mounting shaft 15c, and a plurality of magnetic sensors 13 are arranged so that the magnetic flux on both sides of the cathode K and the anode A can be measured. It was done.

However, since the position where the cathode K and the anode A are supported by the common conductor 32 is displaced by about 5 cm in the X-axis direction, for example, after measuring the cathode K side,
Simply oscillating the magnetic sensor 13 makes the magnetic sensor 13
Is not brought close to the measurement position on the anode A side. Therefore, X
A linear movement guide mechanism is provided on the magnetic sensor mounting frame 15d so as to enable movement in the axial direction. Each magnetic sensor 13 is attached to the tip of a Teflon round bar. This is to avoid damage to the magnetic sensor 13 by bending the Teflon round bar in the event that the magnetic sensor 13 comes in contact with the cathode support rod 34, the electrolytic cell side wall 30c, or the like and runs up. . Further, since each magnetic sensor 13 needs to be accurately arranged at a predetermined position close to the cathode plate K or the anode plate A, the mounting position on the magnetic sensor mounting frame 15d can be adjusted by a fine movement screw. It has been. In this embodiment, as many magnetic sensors 13 as the number of the cathode plates K are provided.

In this embodiment, the magnetic sensor 13 includes
"Fluxgate magnetometer" is used. Although this fluxgate magnetometer has not been used for detecting abnormal electrodes in electrolytic smelting, there is an advantage that the signal processing of the element is simple and the price is low because it is a general-purpose type. .

A stopping device 25 is attached to a magnetic sensor attachment frame 15d attached to a lower portion of the hanging device 15. The stop device 25 includes a locking member 25a, a stopper 25b, a disk 26, a detection body 27,
It has a deceleration sensor 29a, a stop sensor 29b, and an emergency stop sensor 29c. Since the magnetic sensor 13 is swingable so that the magnetic flux on the upper surface of either the left or right side of the electrolytic cell 30 can be measured.
In the present embodiment, as shown in FIG.
3, two locking members 25a are slidably mounted on the magnetic sensor mounting frame 15d so as to be located at 45 degrees with respect to the mounting shaft 15c.
The magnetic sensor mounting frame 15d is mounted at two locations substantially at both ends in the longitudinal direction. With such a structure, it is possible to position one of the locking members 25a in the vertical direction, regardless of whether the magnetic sensor 13 is directed to the left or right electrolytic cell side wall 30c. That is, when the magnetic sensor 13 is positioned in the right 45 degrees direction, b operates, and when the magnetic sensor 13 is positioned in the left 45 degrees direction, a operates (see FIG. 3). Therefore, in the present embodiment, the locking member 25a is
A total of four, two each, are installed at approximately two ends of d. The reason that the locking members 25a are attached to the left and right two ends of the magnetic sensor mounting frame 15d is that the two motors (not shown) for lifting and lowering the hanging device 15 are independently controlled to control the suspension. Fixture device 15
In order to eliminate the inclination of

The upper end of the locking member 25a has a locking member 2
A stopper 25b for preventing falling is provided so that 5a does not fall off. On the other hand, at the lower end of the locking member 25a,
A disk 26 is attached as contact means for making contact with a reference position serving as a starting point of positioning. The disk 26 is large enough to be able to contact the plurality of cathode support rods 34 and is free to rotate in the circumferential direction. At a predetermined position of the locking member 25a, a detection body 27 that is sensed by a non-contact type proximity switch is attached.

On the magnetic sensor mounting frame 15d near the locking member 25a, there are provided a deceleration sensor 29a, which is a proximity switch which operates by detecting the approach of the detection body 27, and a stop sensor 29.
b, Emergency stop sensors 29c are mounted at predetermined positions in order from below, and when each sensor detects the approach of the detection body 27, it operates and sends a signal to a lifting motor (not shown) to decelerate and stop the motor. , Emergency stop.

In the illustrated preferred embodiment, the magnetic data measured by each magnetic sensor 13 is
The data is processed by a data processing device 11 fixed to the upper surface of the display 5 and is printed out and / or displayed on a monitor by a printer installed in a control room separated from a place where the electrolytic cell 30 is installed. The transmission of the magnetic data at this time is performed by radio communication using a high frequency. Wireless communication can transmit less data than optical communication, but has the advantage of eliminating the need for wiring. Of course, optical communication using an optical fiber can also be used.

Although not shown, the magnetic sensor 1
The magnetism measurement performed with the computer 3 positioned near the contact point with each cathode plate K or each anode plate A supported by the common conductor 32 can be automated by controlling using a computer. A switch is provided for switching between automatic operation and normal operation in which the system is manually operated, and a control device for previously selecting an electrolytic cell 30 for detecting an abnormal electrode among the electrolytic cells 30 is provided with a control device for each electrolytic cell. It is installed in a place away from the tank 30. This control device is provided with a push button corresponding to each electrolytic cell 30, and selects the electrolytic cell 30 whose magnetism is to be measured with this button. During the automatic operation, the overhead traveling crane 18
Since it is dangerous for a person to enter the moving range of the above, it is preferable to provide a start switch outside the moving range of the overhead moving crane 18 and start the automatic operation by pressing the start switch.

Next, the operation of the abnormal electrode detection system in the above-described electrolytic smelting will be described. First, in the case of the automatic operation, the electrolytic cell 30 for measuring the magnetism is previously selected by a push button of the control device, and the changeover switch is switched to the automatic operation side. Then, the start switch is pressed. Then, a frame and / or slide body 18 (not shown)
Then, the hanger device 15 is moved to a position above the target electrolytic cell 30 by horizontally moving c. If there is an obstacle or the like during this movement, the second wire 15b is wound and the first wire 16b is wound to adjust the height. When the moving device 18 reaches a predetermined position, the movement is stopped. At this time, since the first cylindrical guide member 18d and the second cylindrical guide member 16d are present, the swing of the hanging device 15 due to the inertial force accompanying the movement of the moving device 18 is suppressed. Thereafter, the lifting motor (not shown) is operated to lower the second wire 15b and lower the hanging device 15.

When the hanging device 15 is lowered, the locking members 25a at two locations at substantially both ends of the magnetic sensor mounting frame 15d.
The discs 26 attached to the lower part of each of them approach the pole 34 for supporting the cathode (FIG. 4A), and then come into contact with each other (FIG. 4A).
(B)). When the disk 26 comes into contact with the cathode support rod 34,
Although the lowering of the locking member 25a stops, the hanging device 15 still continues to lower because the mounting portion with the magnetic sensor mounting frame 15d is slidable. Hanging device 15
Continues to descend, among the various sensors attached to the magnetic sensor attachment frame 15d, the deceleration sensor 29a attached at the bottom first approaches the detection body 27 (FIG. 4 (c)). Then, the deceleration sensor 29a that senses the approach of the detection body 27 issues a signal to decelerate the elevating motor. The elevating motor receiving this signal starts to decelerate, and the descent speed of the hanging device 15 is reduced.

When the hanging device 15 further continues to descend, the stop sensor 29b senses the approach of the detecting body 27, and
A signal is issued to stop the lifting motor. And
The elevating motor receiving this signal stops, and the lowering of the hanging device 15 stops. If the elevating motor does not stop, the detection body 27 approaches the emergency stop sensor 29c. Therefore, the emergency stop sensor 29c detects the approach of the detection body 27 and issues a signal for emergency stopping the elevating motor.
Then, the elevating motor receiving this signal is emergency stopped, and the hanging device 15 is emergency stopped. These series of operations are performed independently at two places at both ends of the magnetic sensor mounting frame 15d.

In conjunction with the above movement, the position guiding means 10
The flare-shaped expanding portion approaches the engaging member 20a attached to the positioning means 20, and the engagement is started soon.
When the hanging device 15 continues to descend further, the flared expanding portion of the position guiding means 10 slides along the side surface of the conical engaging member 20a, and a number of magnetic sensors 13 are determined in advance. The hanging device 15 is finely moved in the horizontal direction so as to be accurately arranged at a predetermined position close to the cathode plate K, the position is controlled and engaged, and then the magnetic flux on the cathode K side is measured.

After measuring the magnetic flux at a predetermined position, the second wire 15b is wound up to raise the suspending device 15, and the magnetic sensor mounting frame 15d is swung 90 degrees in the direction of the anode plate A, and the magnetic sensor 13 is moved. The anode plate A is moved in the X-axis direction so as to be located at the magnetic flux measurement position. Then, the hanging device 15 is lowered to measure the magnetic flux on the anode A side. Thereafter, the second wire 15b is wound up, the lifting device 15 is raised, the moving device 18 is horizontally moved, and the lifting device 15 is moved above the next target electrolytic cell 30, and this operation is repeated.

In the data processing device 11, each magnetic sensor 1
The current value is obtained from the magnetic flux density measured in Step 3 to calculate an average value. Then, an electrode plate showing a value larger or smaller than a certain value from this average value is determined to be abnormal. This magnetic data is printed out and / or displayed on a monitor by a wireless communication from the data processing device 11 by a printer installed in a control room (not shown) isolated from the place where the electrolytic cell 30 is installed.

The abnormal position of the electrode plate is specified as follows. First, as shown in FIG. 5, when the magnetic flux density on the cathode side is first measured by the magnetic sensor 13, a large amount of current flows through "C" where a short circuit has occurred among the plurality of cathode plates K. C "is determined to be abnormal. However, by measuring only the magnetic flux density on the cathode side, the abnormal cathode plate K (here, “C”) can be identified, but short-circuited to either surface of the anode plate A “B” or “D”. I don't know if it's happening. Therefore, when the magnetic flux density on the anode side is measured, “D” indicates an abnormal value and “B” indicates a normal value because a large amount of current flows in “D”.
Therefore, since it is known that a short circuit has occurred between "C" and "D", "C" is raised to remove bumps generated on a surface adjacent to "D".

[0035]

According to the method for detecting an abnormal electrode in electrolytic smelting according to the present invention, the magnetic flux densities of the cathode plate K and the anode plate A are measured at once using a plurality of magnetic detectors.
It is possible to instantly specify an abnormal point. In addition, workers can be released from tank inspection work that requires a lot of labor, and since workers do not walk on the electrolytic tank, it is also possible to avoid inducing displacement of the electrode plate due to walking. it can. Further, since the measurement of magnetism can be automatically performed for a preselected electrolytic cell at night or while the work is not being performed, it is possible to determine the presence or absence of an abnormal electrode at the start of the work. Once discovered, appropriate action can be taken immediately.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing one embodiment of a system for implementing a method for detecting an abnormal electrode in electrolytic smelting according to the present invention.

FIG. 2 is a partially enlarged perspective view of the abnormal electrode detection system of FIG. 1;

FIG. 3 is a schematic side view showing a mounting position of a locking member.

FIG. 4 is a cross-sectional view showing the operation of the locking member.

FIG. 5A is a plan view for explaining a method of identifying a short-circuited electrode, and FIG. 5B is a plan view of FIG.
It is sectional drawing of the side surface of FIG.

FIG. 6 is a schematic plan view for explaining a method of supplying power to the electrolytic cell.

FIG. 7 is a perspective view of a power supply unit for an anode plate and a cathode plate in electrolytic smelting.

[Explanation of symbols]

 Reference Signs List A Anode K Cathode 10 Position guiding means 11 Data processing device 13 Magnetic sensor 15 Hanging device 15a Second guide rod 15b Second wire 15c Mounting shaft 15d Magnetic sensor mounting frame 16 Suspension member 16a First guide rod 16 First wire 16d First 2 cylindrical guide member 18 moving device 18a motor 18b rail 18c slide body 18d first cylindrical guide member 20 positioning means 20a engaging member 25a locking member 25b stopper 26 disk 27 detector 29a deceleration sensor 29b stop sensor 29c emergency stop sensor DESCRIPTION OF SYMBOLS 30 Electrolyzer 30c Long side wall 32 Common conductor 34 Cathode support rod 35 Leg 40 Cob

Claims (8)

(57) [Claims] 1. A cathode plate on a cathode side of a conductor fixed on an upper surface of both opposite side walls of an electrolytic bath and an anode plate on an anode side of an electrolytic cell in which an electrolytic solution is stored. It is alternately immersed in a supported state, and specifies the abnormal position of the electrode plate by measuring the magnetism near the contact between the conductor and the plurality of cathode plates and near the contact between the conductor and the plurality of anode plates. A method of detecting an abnormal electrode in electrolytic smelting, which comprises the steps of: suspending and installing a hanging device so as to be able to move up and down on a horizontally movable overhead crane; and attaching the mounting frame to the hanging device. A step of swinging and moving linearly around the longitudinal direction of the frame; a step of arranging a plurality of magnetic detection devices on the mounting frame; and operating the overhead moving crane to target the lifting gear device. Electrolytic cell After moving to the side, and lowered, the step of measuring the magnetism by positioning the magnetism detection device near the contact point with each of the cathode plates or each of the anode plates supported by the conductor, and the hanging device After raising and swinging and linearly moving the mounting frame, lowering the hanging device so that each magnetic detection device is located near each of the anode plates or the cathode plates and the contacts on the opposite side, A method for detecting an abnormal electrode in electrolytic smelting, comprising: a step of measuring magnetism. 2. The method for detecting an abnormal electrode in electrolytic smelting according to claim 1, further comprising the step of performing data processing on a current value measured by the magnetic detection device, from a place where the electrolytic cell is installed. A step of transmitting to an output device provided in an isolated control room; and a step of printing out and / or displaying on a monitor based on the transmitted processing data. How to detect abnormal electrodes. 3. The method for detecting an abnormal electrode in electrolytic smelting according to claim 1, wherein the signal transmission of the magnetic data from the data processing device is performed by wired optical communication using an optical fiber or wireless communication using a high frequency. A method for detecting an abnormality in electrolytic smelting characterized by performing the method described above. 4. An electrolytic cell in which an electrolytic solution is stored, a cathode plate on the cathode side of a conductor fixed on the upper surface of both opposite side walls of the electrolytic cell, and an anode plate on the anode side, each of which is capable of conducting. It is alternately immersed in a supported state, and specifies the abnormal position of the electrode plate by measuring the magnetism near the contact between the conductor and the plurality of cathode plates and near the contact between the conductor and the plurality of anode plates. A system for detecting abnormal electrodes in electrolytic smelting, which comprises: a horizontally movable overhead traveling crane; a hanging device suspended from the overhead traveling crane; A mounting frame movably mounted, a plurality of magnetic detection devices disposed on the mounting frame,
An abnormal electrode detection system in electrolytic smelting for specifying and detecting an abnormal position of an electrode plate configured to include: 5. The abnormal electrode detection system in electrolytic smelting according to claim 4, wherein the magnetic detection device is constituted by a flux gate magnetometer. Detection system. 6. The abnormal electrode detection system in electrolytic smelting according to claim 4 or 5, wherein a current value measured by the magnetic detection device is subjected to data processing, and from a place where the electrolytic cell is installed. A data processing device for transmitting to an output device provided in an isolated control room; an output device for detecting an abnormal state based on processing data from the data processing device and printing out and / or displaying on a monitor; And a detection system for detecting abnormal electrodes in electrolytic smelting. 7. The abnormal electrode detection system in electrolytic smelting according to claim 4, further comprising: each of the cathode plates or each of the anodes supporting the magnetic detection device by the conductor. An abnormal electrode detection system in electrolytic smelting, characterized in that the system is provided with means for automatically performing a magnetic measurement performed near a contact point with a plate. 8. The abnormal electrode detection system in electrolytic smelting according to claim 7, further comprising: a changeover switch for switching between normal operation and automatic operation; and detecting an abnormal electrode in each of the electrolytic cells. A control device for pre-selecting the electrolytic cell, comprising: automatically measuring the magnetism at night or while the work is not performed on the electrolytic cell pre-selected by the control device. An abnormal electrode detection system in electrolytic smelting characterized by the following.