JP2017066489A - Device and method for controlling power for electrolysis - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power control device of electrolytic refining equipment capable of detecting a phenomenon accompanying decrease in a liquid level within an electrolytic tank and securely preventing dangers caused due to the decrease in the liquid level in electrolytic factories where a plurality of electrolytic tanks are connected in series to a direct-current power source.SOLUTION: A power source control device used in electrolytic refining equipment, which includes a power source having a transformation function part that steps down a received high-voltage current to feed a low-voltage current and an electrolytic unit comprising a plurality of electrolytic tanks connected in series to the power source and form a closed circuit, in which an electrolytic current is fed to the electrolytic unit from the power source. The electrolytic unit is configured with a set of two to m-pieces of serially-connected electrolytic tanks and the electrolytic tanks not belonging to the set, which are connected in series. When a voltage applied to the set shows a value equal to or higher than a cutoff voltage value, the high-voltage current is blocked to stop the electrolytic current fed to the electrolytic unit from the power source.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a safety device that prevents adverse effects on equipment and people in an electrolytic refining facility, and more specifically, a power control device for electrolytic refining for safe operation in an electrolytic refining facility, and its control Regarding the method.

  A nonferrous electrolytic refining method is widely known as a refining method for nonferrous metals such as copper and nickel. This non-ferrous electrolytic refining method is a refining target metal such as Cu or Ni that is dissolved in the electrolytic solution by energizing between the anode (anode plate) and the cathode (cathode plate) immersed in the electrolytic solution in the electrolytic cell. (Hereinafter referred to as the target metal) is electrodeposited on the cathode surface, whereby a high-purity target metal is obtained.

  Specifically, energization is continued and the target metal is electrodeposited on the surface of each cathode to a predetermined thickness, and then the cathode is pulled up from the electrolyte in the electrolytic cell to recover the electrodeposited target metal, and again It is repeated that the cathode before electrodeposition is energized by immersing the cathode in an electrolytic cell. As for the anode, since the anode is consumed over time, the consumed anode is pulled up from the electrolytic cell and replaced with a new one. After the cathode and anode are pulled up, the electrolytic solution is removed by pulling out a plug from a pipe installed at the bottom of the electrolytic cell, and the electrolytic cell is periodically cleaned.

By the way, when using a plurality of electrolyzers, there are a system in which those electrolyzers are connected in series to a power source and a system in which those electrolyzers are connected in parallel to a power source to energize, the former series system being Commonly used.
The reason is that as the electrodeposition progresses, the cathode is likely to come into contact with the anode, and when it comes into contact, the current is concentrated at the contact portion, but this current loss and the accompanying production loss are small in the series system. It is done. Specifically, in the series system, the electric current of the electrolytic cell in which contact has occurred is just wasted. On the other hand, in the parallel system, the current that should flow through the electrolytic cells in the parallel relationship is concentrated on the contact portion and is wasted.

The power sources to be used are roughly classified into a constant current power source that keeps the amount of current constant and a constant voltage power source that keeps the voltage value constant. In a series system, a constant current power source is generally used.
When this constant current power source is used, even if there is a difference in electrical resistance, the current can be evenly distributed to each tank, so that the production amount and quality of the target metal obtained by electrodeposition can be maintained. In addition, when pulling up the cathode or anode from the electrolytic cell, or when changing the circuit temporarily so as to bypass the electrolytic cell, if a constant current power supply is used, temporal fluctuations in the current flowing through each cell are suppressed. Therefore, the production amount and quality of the target metal obtained by electrodeposition can be maintained. The power source may be a DC power source, and may have functions such as pulse energization and reverse direction energization.

  By the way, the cathode, the anode, and the fragments that have fallen off while being energized are heavy and may fall and damage the bottom surface of the electrolytic cell. If the bottom is damaged or the plug is loosened and pulled out, the electrolyte will be lost from the electrolytic cell, and the contact area of the cathode and anode with the bulk electrolyte will decrease as the level of this electrolyte decreases. This contact area finally becomes zero. At this time, an enormous current concentrates on a small contact area, and there is a risk that the overheated electrolyte bumps and burns or burns. There is also a risk of dazzling eyes and fires with sparks of air discharge.

These dangers can be prevented by temporarily changing the circuit so as to bypass the electrolytic cell if a tank in which the liquid level of the electrolytic solution is lowered can be found at an early stage. However, since there are a cathode and an anode in the upper part of the electrolytic cell to block the field of view, the liquid level of the electrolytic solution and the state of the cell bottom cannot be seen from a distance, and the electrolytic cell is about several m ² per cell. It usually occupies a lot of site area and is often housed in units of several hundreds in a building away from the electrolytic refining control room, so early detection by visual inspection was difficult.

Therefore, in order to remove the dangerous state, as shown in Patent Document 1, the stable voltage value of the electrolyzer is read and stored, and when the allowable fluctuation range is set for this value, the voltage value deviates from the allowable range. In addition, a technique for protecting an electrolyzer is known. However, since many electrolytic cells are connected to the power supply (especially in series) in the electrolytic plant, the voltage of the electrolyzer is stabilized by the large number of electrolytic cells, and there is a danger related to a decrease in the electrolyte level. Could not get rid of.
As described above, there has been a demand for a system that accurately detects a decrease in liquid level in an electrolytic cell and reliably prevents danger.

Japanese Patent Laid-Open No. 03-130385

  The present invention detects a phenomenon associated with a decrease in the liquid level in the electrolytic cell in an electrolytic factory in which a plurality of electrolytic cells are connected in series to a DC power source, and reliably prevents the danger caused by the decrease in the liquid level. An object of the present invention is to provide a power supply control device for an electrolytic refining facility and a control method therefor.

The inventors observed the change in the amount of the electrolytic solution in the electrolytic cell when the electrolytic solution decreased from the electrolytic cell in the operating state, and found that the rate of change was constant. Also, study the change in voltage (battery voltage) applied to the electrolytic cell when the electrolytic solution decreases from the electrolytic cell, and that the voltage applied to the electrolytic cell increases at an accelerated rate as the amount of electrolytic solution decreases. I found it.
Therefore, if the change rate of the voltage fluctuation rate per unit time is determined, it is possible to accurately detect a decrease in the liquid level in the electrolytic cell.
Subsequently, the inventors examined a method of finding a change in the voltage fluctuation rate within a certain time, for example, made a set of 10 to 20 electrolytic cells connected in series, and measured the voltage of the set. As a result, it was found that a decrease in the liquid level in the electrolytic cell can be detected in a short time, and the present invention was completed.

  The first invention of the present invention is an electrolysis comprising a power source having a transformer function part for stepping down received high-voltage current and feeding low-voltage current, and a plurality of electrolytic cells connected in series to the power source to form a closed circuit. A power supply control device for use in an electrolytic refining facility that supplies an electrolytic current from a power source to an electrolysis unit, the electrolysis unit being composed of two or more series-connected m electrolytic cells, An electrolytic cell that does not belong to the set is connected in series, and when the voltage applied to the set shows a voltage higher than the cut-off voltage value, the high-voltage current is cut off, thereby It is a power supply control apparatus used for the electrolytic refining equipment characterized by stopping the supply of current.

  A second invention of the present invention is an electrolysis comprising a power source having a transformer function unit for stepping down received high-voltage current and feeding low-voltage current, and a plurality of electrolytic cells connected in series to the power source to form a closed circuit. A power supply control device for use in an electrolytic refining facility for supplying an electrolytic current from a power source to an electrolysis unit, wherein the electrolysis unit comprises two sets of one or more m electrolytic cells connected in series. It is composed of n or more groups, or a series connection, and the difference between the voltage applied to any one of the n sets and the voltage applied to another set different from the set is a voltage that is equal to or higher than the cutoff voltage value. In the case of the power supply control device, the supply of the electrolytic current from the power supply to the electrolysis unit is stopped.

  According to a third aspect of the present invention, there is provided a power supply control device characterized in that the supply of the electrolysis current in the second aspect is stopped by cutting off the high-voltage current to the transformer function unit.

  According to a fourth aspect of the present invention, there is provided a power supply control device characterized in that the voltage applied to the set according to the first to third aspects of the invention increases at an accelerated rate.

  According to a fifth aspect of the present invention, an increase in voltage applied to a set of m electrolytic cells connected in series using the power supply control device according to the first to fourth aspects of the invention is detected, and the power supply to the electrolysis unit is detected. After the supply of the electrolytic current is stopped, the set in which the increase in voltage is detected includes a tank in which the amount of the electrolytic solution is reduced, and an energization path that bypasses the tank is constructed, and the supply of the electrolytic current is resumed. This is a power control method.

  According to the present invention, in an electrolytic refining facility in which a plurality of electrolytic cells are connected in series to a DC power source, it is possible to detect a decrease in the liquid level of the electrolytic solution in the electrolytic cell, and reliably prevent a risk caused by the decrease in the liquid level. Can be provided.

It is the schematic which shows the equivalent circuit of one specific example of the electrolysis process using the power supply control apparatus of this invention. It is a figure which shows a general electrolytic cell, (a) is sectional drawing, (b) is the schematic which shows the flow path of a copper ion and an electric current (* same arrow). It is the schematic which shows the electricity supply path | route which bypasses the tank where the amount of electrolyte solution decreased in this invention. It is a schematic flowchart which shows the power supply control apparatus which concerns on Example 1 of this invention. It is a schematic flowchart which shows the power supply control apparatus which concerns on Example 2 of this invention. It is the schematic which shows the equivalent circuit of the conventional electrolysis process. In an electrolysis process, it is the schematic which shows the equivalent circuit at the time of losing electrolyte solution from one electrolytic vessel.

Hereinafter, the power supply control device and the power supply control method of the present invention will be described in detail.
In this invention, the voltage concerning the group comprised by connecting the electrolytic cell in series is measured, and when the measured voltage value becomes excessive, the supply of the electrolytic current from the power source to the electrolytic cell is stopped. In the present invention, measurement is performed so that the measured value of the voltage becomes a positive value.
Whether or not the measured voltage value is excessive is determined by calculating an evaluation voltage value from the measured voltage value, and when the evaluated voltage value indicates a value equal to or higher than a preset breaking voltage value, the measured voltage value is Judge that it is excessive.

The cut-off voltage value serving as the determination criterion can be obtained by linearly combining the average evaluation voltage value and the fluctuation range of the evaluation voltage value, as described in detail in the following formulas (1) to (8). In addition, the evaluation voltage value and the cutoff voltage value are preferably calculated and set every predetermined period. By doing so, it is possible to detect an abnormality such as a decrease in the liquid level in the electrolytic cell at an early stage and to reduce erroneous detection.
It is desirable that the data period used for calculation of the cutoff voltage value is longer than the update interval of the cutoff voltage value. By doing so, the cut-off voltage value is stabilized and the abnormality detection accuracy can be improved.

As a method for calculating the evaluation voltage value and the cutoff voltage value, the first or second evaluation method described later is used.
[First Evaluation Method]
The measurement voltage value E [V] is used as it is as the evaluation voltage value.
At this time, any one of the following formulas (1) to (3) can be used as the cutoff voltage value [V].

  In particular, in the electrolytic purification of copper, the value calculated by the following formula (3) can be used as the cutoff voltage value. Note that the number of measurement tanks is the number of electrolytic tanks arranged in a series of electrolytic tanks connected in series when the measurement voltage value E is measured (that is, the range in which the measurement voltage value E is applied). .

  In this method according to the present invention, the measured voltage value E of the voltage applied to the group in which the electrolytic cells are connected in series is used as the evaluation voltage value, so that the evaluation voltage value is large and little fluctuates. For this reason, the evaluation voltage value (= measurement voltage value E) reaches the cut-off voltage value represented by the above formula (1) or (2) when there is an abnormality such as a decrease in the liquid level in the electrolytic cell. it can.

  In particular, in the electrolytic refining of copper, the measured voltage value E of the voltage is generally 0.2 V / bath to 0.4 V / bath per electrolytic cell, and is generally 0.25 V / bath to 0.00. It is in the range of 35V / tank. For this reason, it can be said that the measured voltage value E of the voltage reaches the cut-off voltage value represented by the above formula (3) is an abnormality such as a decrease in the liquid level in the electrolytic cell.

[Second evaluation method]
As an evaluation voltage value, the absolute value of the difference between the measured voltage value E and the measured value E ′ of the voltage applied to another group in which the same number of electrolytic cells as the set of electrolytic cells recording the measured voltage value E are connected in series. | EE ′ | is used. One of the following values is used as the cut-off voltage value at this time.

  In this evaluation method, since the absolute value | EE ′ | of the difference between the voltages applied to a set in which the same number of electrolytic cells are connected in series is used as the evaluation voltage value, the evaluation voltage value varies less. It can be said that the voltage value | E−E ′ | reaches the cutoff voltage value represented by the above formula (4) or formula (5) at the time of abnormality such as a decrease in the liquid level in the electrolytic cell. Further, since E × 1.0 ≦ E ′ × 1.1 and E ′ × 1.0 ≦ E × 1.1 at normal times, the equations (4) to (5), (6), (7) can be obtained and can be operated more easily. In addition, since almost the same current flows in each set during normal times, the evaluation voltage value | E−E ′ | has an advantage that it can be stably operated even if the amount of current is changed.

(When there are many pairs)
In an electrolytic smelting facility that includes a large number of sets composed of a plurality of electrolytic cells, there are innumerable combinations of sets, and therefore it is expected that it will be difficult to operate the evaluation voltage value and the cutoff voltage value.

  For example, in the above equation (4), the maximum value and the minimum value of | E−E ′ | are different from the average value, and cannot be obtained from the average value of E or the average value of E ′. This difficulty can be reduced by setting the cutoff voltage value to the following equation (8).

When there are a large number of sets composed of a plurality of electrolytic cells, while using various evaluation voltage values | EE ′ | It may be represented by a value. As a result, the cost and time required for recording and calculating the cutoff voltage value can be greatly reduced.
At this time, in calculating the cut-off voltage value, erroneous detection can be prevented by selecting E and E ′ so that the cut-off voltage value is maximized.

(Measurement period)
The starting date of the data used for calculating the average value, maximum value, and minimum value of the present invention is “10 days ago”, “at the time when the liquid level of all the electrolytic cells in the set in which the electrolytic cells are connected in series”, “energization” It is preferable to set a later time of either “the time when the number of tanks changes” or “the time when the electrolytic current is intentionally changed”.
Furthermore, the end of the data is preferably set at the time of calculation or immediately before the time of calculation.

(Electrolyzers constituting the set)
The electrolytic cells constituting one set are preferably not limited to all the electrolytic cells connected in series to the power source, but only a part of the electrolytic cells. By doing in this way, the change of a voltage can be made sensitive and detected with high sensitivity.
Although the number m of the electrolytic cells constituting one set may be one or more, preferably two or more. When time is required for the measurement, it is better to use 9 tanks or 18 tanks or more. This reduces the number of sets to be measured, making it easier to finish the measurement in time.

As for the number n of sets to be set, as shown in FIG. 6, which is a schematic diagram showing an equivalent circuit of a conventional electrolysis process, the electrolytic cell is configured by turning back and forth inside the building. For this reason, it is preferable to set a set of electrolytic cells from the turning point to the turning point. It is more preferable to make a set of electrolytic cells from the odd number of turns until it returns. Specifically, the set of parts is under voltage E _a and E _b of FIG.
FIG. 1 is a schematic diagram showing an equivalent circuit of a specific example of an electrolysis process using the power supply control device of the present invention.

1 and 6, V _jk is an electrolytic cell (j set, k-th electrolytic cell), j is a set number, k is an electrolytic cell number in the set, N is a set of electrolytic cells, 3 is a power supply device, 4 is a blocking unit, 5 is a transformer function unit, 6 is an AC power source, E ₁₁ and E ₁₂ are voltages applied to one electrolytic cell, E _a and E _b are voltages applied to a set of electrolytic cells, and E _all is in series. Is the voltage applied to all the electrolyzers connected to.
Here, E ₁₁ , E ₁₂ , E _a , E _b , E _all represent the above measured voltage values, and E ₁₁ , E ₁₂ are the measured voltages of the first and second electrolytic cells in the first set, respectively. The values, E _a and E _b, are a set of 12 electrolytic cells and a measured voltage value of the adjacent set, and E _all is a measured voltage value when all the electrolytic cells are set as one set. Voltage.

As shown in FIG. 1, a power supply device 3 for an electrolytic plant equipped with an electrolytic refining facility according to the present invention includes a voltage transforming function unit 5 inside. The voltage transforming function unit 5 receives a high-voltage current and steps down the voltage. A large amount of low-voltage current is supplied to the electrolytic cell.
Therefore, when the supply of the electrolysis current from the power source to the electrolyzer is stopped, the supply is stopped by interrupting the high-voltage current to the transformer function unit 5. By doing so, the current passing through the interrupting unit 4 (so-called switch) is a high-voltage side current, which is less than when the low-voltage current is interrupted. Less consumption.
When the high-voltage current is alternating current, the power supply device 3 may convert (rectify) into direct current at the same time as the step-down as shown in FIG. After that, it may be converted to direct current (rectified).

2A and 2B are diagrams showing a general electrolytic cell, in which FIG. 2A is a cross-sectional view, and FIG. 2B is a schematic diagram showing a flow path of copper ions (black arrow) and current (black arrow). And the current passes through the flow path in the same direction. In FIG. 2, V is an electrolytic cell, L is an electrolytic solution, A is an anode, C is a cathode, and 11 is a liquid level of the electrolytic solution.
Since the electrolytic solution L in the electrolytic cell V forms a circuit through which copper ions and current pass as shown in FIG. 2B, the higher the liquid level 11, the larger the cross-sectional area through which copper ions and current pass. Become. It is well known that the resistance value of a conductor is inversely proportional to the cross-sectional area, and the resistance value increases at an accelerated rate even if the liquid level of the electrolytic solution in the electrolytic cell decreases at a constant rate. This is the first factor that the voltage applied to the set increases at an accelerated rate.

  As the electrolytic solution L in the electrolytic cell V decreases, the electrolytic current concentrates on the remaining small amount of electrolytic solution, and the evaporation of the electrolytic solution accelerates. As a result, crystals are deposited on the surface of the anode A and the surface of the cathode C, preventing current conduction. The resistance value also increases at an accelerated rate as the evaporation of the electrolyte proceeds at an accelerated rate and crystals precipitate. This is the second factor that the voltage applied to the set increases at an accelerated rate.

When constant current electrolysis is performed while the resistance value increases at an accelerated rate due to the first factor or the second factor described above, the voltage applied to the electrolytic cell is proportional to the resistance value. Increase. Utilizing this fact, the supply of the electrolytic current from the power source to the electrolytic cell is stopped only when the voltage or the voltage difference increases at an accelerated rate.
In this way, when the electrolytic solution is not decreasing, the supply of the electrolytic current is not stopped by mistake, so that the wasteful stop is reduced and the production amount can be increased.

In addition, after detecting the increase in voltage or voltage difference and stopping the supply of electrolytic current from the power source to the electrolytic cell, the cause is identified, and an energization path that bypasses the cell in which the amount of electrolyte is reduced is constructed. , Restart the supply of electrolysis current. If it does in this way, while repairing the tank in which the amount of electrolyte solution decreased, or replenishing electrolyte solution, it can supply by supplying an electric current to another electrolytic tank, and can produce.
More specifically, for example, when the electrolyte of the electrolytic cell V ₂₂ within the dotted line is washed away as in Figure 7, after stopping the supply of electrolysis current in the present invention, a short circuit 10 the black part of FIG. 3 By short-circuiting, the current is bypassed as indicated by the white arrow, and the supply of the electrolytic current is resumed. In FIG. 3, “open x” corresponds to the second set No. 2 electrolytic cell V ₂₂ in FIG. 7, and is an electrolytic cell that is not functioning because the electrolytic solution is lost.

(Evaporated electrolyte)
As the evaporation of the electrolyte proceeds at an accelerated rate, a large amount of water vapor is supplied above the electrolytic cell. In the electrolytic building, water vapor evaporates from the electrolytic cell and the humidity is high, so that a large amount of water vapor is condensed in the air to form mist. This fog can be detected using light, such as a phototube. Only in such a case, the supply of the electrolysis current from the power source to the electrolytic cell may be stopped. In this way, when the electrolytic solution is not decreasing, the supply of the electrolytic current is not stopped by mistake, so that the wasteful stop is reduced and the production amount can be increased.
Such detection using light can be suitably used when there are a large number of electrolytic baths, and also makes it easy to identify a bath with reduced electrolyte.

  As described above, the present invention provides a system capable of detecting a decrease in the liquid level in an electrolytic cell and reliably preventing danger in an electrolytic factory in which a plurality of electrolytic cells are connected in series to a DC power source. Can do. The current supplied from the DC power source is preferably a DC current, but may have a pulsating current or the current direction may be temporarily reversed.

  Hereinafter, the present invention will be further described with reference to examples.

As the power supply control device of the present invention, copper was subjected to electrolytic purification using the power supply control device shown in the schematic flow chart showing the power supply control device according to Example 1 of FIG.
The power supply control device shown in FIG. 4 measures the voltage of a set in which a plurality of electrolytic cells are connected in series, and sends the voltage of this set to the alarm setter via the instrument transformer. The input value of the alarm setter is When the set value is exceeded, a DC overvoltage signal is output.
Further, when this DC overvoltage signal is output, a serious failure alarm is issued and the protection circuit is operated to automatically stop the power supply apparatus.
In addition, each electrolytic cell is connected in series to the power supply device, thus forming a closed circuit.

A high-voltage current was stepped down and rectified with a power supply device to energize each electrolytic cell, and a value corresponding to 1.1 times the voltage of the set at this time was set as a set value of the alarm setter. When the plug at the bottom of a certain electrolytic cell was pulled out with the current flowing, the electrolytic solution in the electrolytic cell decreased, and the current flow was automatically stopped.
The voltage of the set when the energization was stopped was the voltage when the alarm setter was set.

The electrolytic refining of copper was performed using the power supply control apparatus shown in the schematic flow chart showing the power supply control apparatus according to Example 2 of the present invention in FIG.
The power supply control device in FIG. 5 measures the voltage of a set of 18 electrolytic cells connected in series, and sends the maximum voltage difference of each set to the alarm setter via the instrument transformer. A DC overvoltage signal is output when the setter input value exceeds the set value. When a DC overvoltage signal is output, a serious failure alarm is issued and a protection circuit is operated to automatically stop the power supply device.
Note that each set is connected in series to the power supply device to form a closed circuit.

A high-voltage current was stepped down and rectified with a power supply device, and each electrolytic cell was energized. As a set value for the alarm setter, a value corresponding to 0.1 times the voltage of the set at this time was set. Then, when the plug at the bottom of a certain electrolytic cell was pulled out while energizing each electrolytic cell, the electrolytic solution in the electrolytic cell decreased and the energization was automatically stopped.
The maximum voltage difference of each set when the energization was stopped was the voltage at the time of setting the alarm setter.

As the power supply control device of the present invention, copper was subjected to electrolytic purification using the power supply control device shown in the schematic flow chart showing the power supply control device according to Example 1 of FIG.
The power supply control device shown in FIG. 4 measures the voltage of a set in which a plurality of electrolytic cells are connected in series, and sends the voltage of this set to the alarm setter via the instrument transformer. The input value of the alarm setter is When the set value is exceeded, a DC overvoltage signal is output.
Further, when this DC overvoltage signal is output, a serious failure alarm is issued and the protection circuit is operated to automatically stop the power supply apparatus.
In addition, the power supply device has a closed circuit in which one set of two electrolytic cells connected in series and one set of four electrolytic cells connected in series are connected in series. ing.

A high-voltage current was stepped down and rectified by a power supply device, and each electrolytic cell was energized, and a value corresponding to 0.4 volt times the number of cells was set as the set value of the alarm setter. When the plug at the bottom of the electrolyzer belonging to the set of two tanks was pulled out while energized, the electrolyte in the electrolyzer decreased and the energization was automatically stopped.
The voltage of the set when the energization was stopped was the voltage when the alarm setter was set.

A current of 20 kA was passed through the electrolytic cell to perform electrolytic purification of copper.
When the plug at the bottom of a certain electrolytic cell was pulled out while passing an electric current, the electrolyte in the electrolytic cell decreased, and the voltage applied to the electrolytic cell was measured every 5 minutes after the plug was removed.
The voltage was measured seven times, but the voltage increased monotonically, and the rate of increase increased as the number of measurements increased.

After Example 1, a short circuit was placed to form a circuit that bypasses the electrolytic cell from which the plug was removed, and then energization was resumed.
When the cathode surface of the electrolytic cell being energized was regularly observed with a magnifying glass, it was confirmed that electrodeposition of copper was proceeding without any particular problem.

V _jk , V Electrolyzer j j Electrolyzer set number k Electrolyzer number in set L Electrolyte A Anode C Cathode 3 Power supply 4 Blocking unit 5 Transformer function unit 6 AC power supply 10 Short circuit 11 Electrolyte liquid level

Claims (5)

A power source including a transformer function unit that steps down received high-voltage current and supplies low-voltage current; and an electrolysis unit that includes a plurality of electrolytic cells connected in series to form a closed circuit. A power supply control device used in an electrolytic refining facility for supplying an electrolytic current to a part,
The electrolysis unit has a configuration in which two or more series-connected m electrolytic cells and an electrolytic cell not belonging to the set are connected in series.
When the voltage applied to the set shows a voltage equal to or higher than the cutoff voltage value,
The power supply control apparatus used for the electrolytic refining equipment characterized by stopping the supply of the electrolytic current from the power supply to the electrolysis unit by cutting off the high-voltage current. A power source including a transformer function unit that steps down received high-voltage current and supplies low-voltage current; and an electrolysis unit that includes a plurality of electrolytic cells connected in series to form a closed circuit. A power supply control device used in an electrolytic refining facility for supplying an electrolytic current to a part,
The electrolysis unit is composed of one or more series connected m series electrolytic cells, two or more sets, n sets, and a series connection.
When the difference between the voltage applied to any one of the n sets and the voltage applied to another set different from the set indicates a voltage equal to or higher than the cutoff voltage value, the electrolytic current from the power source to the electrolysis unit The power supply control device characterized by stopping the supply of.   The power supply control device according to claim 2, wherein the supply of the electrolytic current is stopped by interrupting a high-voltage current to the transformer function unit.   The power supply control device according to any one of claims 1 to 3, wherein a voltage applied to the set increases at an accelerated rate. An increase in voltage applied to a set of m electrolytic cells connected in series using the power supply control device according to any one of claims 1 to 4 is detected, and supply of an electrolytic current from the power supply to the electrolysis unit is detected. After stopping
The set in which the voltage increase is detected includes a tank in which the amount of the electrolyte is reduced, and constructs an energization path that bypasses the tank,
A power supply control method, wherein the supply of the electrolytic current is resumed.

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