JP5147762B2 - Cathode plate suspension measurement apparatus, electrolytic apparatus, cathode plate suspension measurement method, and electrolytic apparatus operation method in electrolytic refining - Google Patents

Description

  The present invention relates to an apparatus for measuring the suspendability of a cathode plate in electrolytic refining.

  When electrolytic refining of copper is performed, pure copper is electrodeposited on the cathode plate by inserting the anode and cathode electrode plates into the electrolytic bath in which the copper sulfate solution is stored and energizing. If the cathode plate is not sufficiently suspended, electrodeposition cannot be performed satisfactorily, and the surface condition may be deteriorated. In particular, in the permanent cathode type electrolytic refining, flatness and verticality deteriorate due to aging of the cathode plate and mechanical damage, and as a result, electrodeposition defects and short-circuits occur at locations where the distance between the anode and the cathode becomes small. Occurs and causes product quality and productivity. For this reason, it is necessary to perform periodic maintenance such as extraction of a cathode plate having deteriorated suspension property and correction of verticality. As described above, the measurement of the suspendability of the cathode plate is an important work. Conventionally, this work has been performed manually, and a great deal of labor is required to measure the suspendability of all the cathode plates in the electrolysis apparatus. It was hanging. Therefore, for example, Patent Document 1 and Patent Document 2 propose an apparatus that automates the measurement of the suspension property of the cathode plate.

  The thin plate measuring apparatus disclosed in Patent Document 1 includes a non-contact distance meter that moves up and down and right and left along a vertical plane with a certain distance from a thin plate suspended from a measurement unit, and a swing of the suspended thin plate. And a steady rest device for stopping the movement. This measuring apparatus sequentially and continuously measures the flatness and suspension of a plurality of thin plates.

  The flatness measuring apparatus of Patent Document 2 includes a plurality of sensors that measure the distance between a plane and a plate that are parallel to each other on both the front and back surfaces of a freely suspended electrode plate in a non-contact manner. The state of deformation and warpage of the electrode plate is analyzed by moving in the vertical direction.

Japanese Patent Laid-Open No. 8-134681 Japanese Patent Laid-Open No. 7-190744

  By the way, since the measuring apparatus of patent document 1 stops the shake of a thin plate with a steadying device, since a non-contact type distance meter moves and measures the flatness of a thin plate, it takes time to measure one thin plate. Cost. Moreover, the measuring apparatus of patent document 2 starts the measurement by the sensor after the measurement conditions are prepared after the electrode plate is pulled up to a predetermined position. Therefore, it takes time to start measurement. Furthermore, since the measuring apparatus of Patent Document 2 selects whether to specify the electrode plate to be measured or to set the measurement time, it is considered that the measurement and deformation of some of the electrode plates are measured. Therefore, when abnormality is observed in the electrode plate that is not measured, there is a possibility that these cannot be detected.

  Accordingly, an object of the present invention is to shorten the measurement time of the suspension property of the cathode plate.

The cathode plate suspending property measuring apparatus of the present invention that solves this problem is a suspension means for suspending a cathode plate for electrolysis,
Non-contact measuring means for measuring the distance to the cathode plate in a state of being hung and shaken by the suspension means;
An intermediate position calculated from the maximum value and the minimum value of the distance to the cathode plate measured by the measuring means is estimated as a virtual stop position when the shaken cathode plate is stationary, And an arithmetic means for digitizing the suspension of the cathode plate based on the stop position .

  The cathode plate suspending property measuring apparatus of the present invention can calculate the suspendability of the cathode plate in a shake state. That is, it is possible to calculate the suspension property of the cathode plate by starting measurement before being suspended by the suspension means and becoming stationary. Accordingly, the suspension measurement time can be shortened. Thus, since the measurement time per cathode plate can be shortened, the suspension property of all cathode plates in the electrolysis apparatus can be calculated, and defective cathode plates can be detected and removed.

  The calculation means in the cathode plate suspension measuring apparatus can calculate the suspension of the cathode plate based on the maximum value and the minimum value of the distance to the cathode plate measured by the measurement means.

  The intermediate position between the maximum value and the minimum value of the distance to the cathode plate in the shaken state measured by the measuring means is a value that approximates the actual position of the cathode plate in the stationary state. Therefore, the virtual position of the stationary cathode plate can be estimated from such an intermediate value, and the suspension property of the cathode plate can be calculated.

  Further, the measuring means in the cathodic plate suspension measuring device may be a plurality of distance meters arranged in parallel in the vertical direction.

  Such a cathode plate suspending property measuring apparatus is based on the distance to the cathode plate obtained by a distance meter arranged on the uppermost side in the vertical direction. Cathode plate suspension measuring device is the distance to the cathode plate obtained by the distance meter arranged on the lower side of this distance meter and the cathode plate obtained by the distance meter arranged on the uppermost side as a reference. Suspension can be calculated based on the difference from the distance.

  Further, the measuring means in the cathodic plate suspension measuring apparatus can arrange a group of measuring instruments composed of a plurality of distance meters arranged in parallel in the vertical direction in parallel in the horizontal direction.

  Suspension can be calculated based on the above difference at several places in the horizontal direction. By calculating the suspension at several places on the flat cathode plate, the accuracy of the suspension can be improved.

  The calculation means in the cathodic plate suspension measuring device provided with the plurality of distance meters, based on the maximum value and the minimum value of the distance to the cathode plate measured by each of the plurality of distance meters, The suspension property of the cathode plate can be calculated.

  The intermediate position obtained from the maximum value and the minimum value of the distance acquired by each distance meter is a value that approximates the measurement position on the actual cathode plate in a stationary state. A suspended cathode can be calculated by estimating a virtual stationary cathode plate from an intermediate position obtained from a plurality of distance meters.

  The electrolysis apparatus of the present invention includes a stripping device for stripping off the metal electrodeposited on the cathode plate by electrolytic refining, and any one of the above cathodes for measuring the suspension property of the cathode plate after stripping off the electrodeposited metal. And a board suspension measuring device.

  The cathode plate is taken out of the electrolytic cell in order to strip the metal in the stripping device, stripped of the metal, and then returned to the electrolytic cell. After stripping off the metal, the suspension of the cathode plate can be measured before returning to the electrolytic cell. The above-described cathode plate suspension measuring device can perform suspension measurement in a shorter time than the stripping operation time, so that the suspension property during the stripping operation of metal electrodeposited on other cathode plates can be measured. Measurement can be completed. Therefore, the suspendability of all the cathode plates in the electrolysis apparatus can be measured.

Further, the method for measuring the suspending property of the cathode plate according to the present invention includes a step of suspending the cathode plate after stripping off the metal electrodeposited on the surface by electrolytic refining, and while the suspended cathode plate is swung. In addition, the step of measuring the maximum value and the minimum value of the distance to the cathode plate in a non-contact manner, and the intermediate position calculated from the maximum value and the minimum value of the measured distance to the cathode plate were shaken. And estimating the virtual stop position when the cathode plate in a stationary state, and quantifying the suspension property of the cathode plate based on the virtual stop position .

  By such a method, the suspension property of the cathode plate can be calculated in a shake state. Accordingly, the suspension measurement time can be shortened. Since the measurement time per cathode plate can be shortened, the suspension property of all cathode plates in the electrolysis apparatus can be calculated, and the defective cathode plate can be detected and removed.

In addition, the method of operating the electrolysis apparatus of the present invention includes a step of removing a cathode plate for electrolysis from an electrolytic cell, a step of stripping off the electrodeposited metal from the cathode plate, and a step after stripping off the electrodeposited metal. The step of suspending the cathode plate, the step of measuring the maximum value and the minimum value of the distance to the cathode plate in a non-contact manner while the suspended cathode plate is swung, and the measured cathode plate An intermediate position calculated from the maximum value and the minimum value of the distance up to is estimated as a virtual stop position when the shaken cathode plate comes to rest, and the suspension property of the cathode plate based on the virtual stop position A step of quantifying the value indicating the cathode plate, a step of determining the suspension property of the cathode plate to be defective, a step of removing the cathode plate determined to be defective, and an electrolysis of the cathode plate that is not defective in the determination of the suspension property of the cathode plate And a step of returning to the tank.

  By such a method, after the metal taken out from the electrolytic cell and electrodeposited is peeled off, the suspended property of the cathode plate can be calculated before returning to the electrolytic cell, and the cathode plate with poor suspended property can be removed. In particular, in this method, since the measurement time per cathode plate is short, the suspension property of all cathode plates in the electrolysis apparatus can be calculated, and a defective cathode plate can be detected. Thereby, while suppressing the deterioration of the perpendicularity and suspension property of a cathode, the contact with an anode and a cathode can be avoided and stable electrolytic refining can be performed.

  The suspension property measuring apparatus for a cathode plate of the present invention can calculate the suspension property of the cathode plate in an amplitude state. Therefore, the suspension measurement time can be shortened, suspension properties of all cathode plates in the electrolysis apparatus can be calculated, and defective cathode plates can be detected and removed.

It is explanatory drawing which showed schematic structure of the suspension property measuring apparatus of the cathode plate in an Example. It is explanatory drawing which expanded and showed the suspension part of FIG. 1, Comprising: (a) shows the state of the suspension part before raising a cathode plate, and after lowering, (b) raised the cathode plate. Indicates the state. It is explanatory drawing which showed schematic structure of the electrolyzer incorporating the suspension property measuring apparatus of a cathode plate. It is explanatory drawing which showed the outline of the relationship between the cathode plate and the distance sensor of the shake | deflection state, Comprising: (a) shows the state in which the cathode plate was furthest away from the distance sensor, (b) shows the cathode plate the most distance sensor It shows a state approaching. (A) is explanatory drawing which showed the suspension value at the time of swinging the suspended cathode plate by different swing width, (b) is the 5th distance sensor thru | or 8th distance sensor of the sample 1 in the same experiment. It is explanatory drawing which showed the suspension property value computed from the measured value. It is explanatory drawing which showed the value of FIG.5 (b) in the graph. The result of measuring the suspension of the cathode plate by incorporating the measuring device into the electrolyzer (online measurement) and the result of the operator measuring the suspension of the cathode plate taken out from the electrolyzer and suspended (offline measurement) It is explanatory drawing which compared with.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing a schematic configuration of a cathode plate suspension measuring device (hereinafter simply referred to as “measuring device”) 1 of the present embodiment. FIG. 1A shows a side view of the measuring apparatus 1, and FIG. 1B shows a front view of the measuring apparatus 1.

  The measuring device 1 is a device that calculates the suspension property of the cathode plate 2 used in electrolytic refining. The cathode plate 2 is a cathode plate used in the ISA method, which is a kind of permanent cathode system, and is suspended from the beam 21 so as to vibrate in a pendulum shape. The cathode plate 2 is a stainless steel plate having a vertical length of 1183 mm, a horizontal length of 1225 mm, and a thickness of 3 mm when suspended.

  The measuring device 1 includes a suspension part 3, a conveyor 4 for transportation, and first distance sensors 5a to 12th distance sensors 5l. The suspension part 3 is disposed on the upper part of the measuring apparatus 1 and can support the beam 21 of the cathode plate 2 and suspend the cathode plate 2. The conveyer 4 is a device that conveys the cathode plate 2 in a direction along the plane of the cathode plate 2 with the lower portion of the cathode plate 2 interposed therebetween.

  FIG. 2 is an explanatory view showing the suspension part 3 in an enlarged manner. The suspension unit 3 includes a guide 31, a plate 32 that pulls the beam 21 upward, and a drive device 34 that rotates the plate 32 around a fulcrum 33. FIG. 2A is an explanatory view showing the state of the suspension portion 3 before the cathode plate 2 is pulled up and after it is lowered, and FIG. 2B is an explanation showing the state where the cathode plate 2 is pulled up. FIG.

  The first distance sensor 5a to the twelfth distance sensor 5l are measuring instruments that measure the distance to the object to be measured without contact. The first distance sensor 5a to the twelfth distance sensor 5l have similar performance, and can record a measurement range of 150 mm ± 40 mm, a resolution of 4 μm per 1 mv, and data every 1 ms.

  Each of the first distance sensor 5 a to the twelfth distance sensor 5 l is disposed so as to face the surface on one side of the cathode plate 2 suspended from the suspension portion 3. As shown in FIG. 1 (b), the first distance sensor 5a to the twelfth distance sensor 5l are arranged by arranging three measuring instrument groups including four distance sensors arranged side by side in the vertical direction. ing. Here, the first distance sensor 5a, the second distance sensor 5b, the third distance sensor 5c, and the fourth distance sensor 5d are arranged on the left side of the cathode plate from the top. Further, a fifth distance sensor 5e, a sixth distance sensor 5f, a seventh distance sensor 5g, and an eighth distance sensor 5h are arranged from the top toward the center of the cathode plate. A ninth distance sensor 5i, a tenth distance sensor 5j, an eleventh distance sensor 5k, and a twelfth distance sensor 5l are arranged on the right side facing the cathode plate.

  The difference Δx12 between the horizontal position x1 of the first distance sensor 5a and the horizontal position x2 of the second distance sensor 5b is arranged to be within 6 mm. Further, the difference Δx13 between the horizontal position x1 of the first distance sensor 5a and the horizontal position x3 of the third distance sensor 5c is also set to be within 6 mm. The difference Δx14 between the horizontal position x1 of the first distance sensor 5a and the horizontal position x4 of the fourth distance sensor 5d is also set to be within 6 mm.

  Further, the vertical distance Δy12 between the first distance sensor 5a and the second distance sensor 5b, the vertical distance Δy23 between the second distance sensor 5b and the third distance sensor 5c, the third distance sensor 5c and the fourth distance sensor 5d, Each vertical distance Δy34 is approximately 250 mm.

  The horizontal distance Δx15 between the first distance sensor 5a and the fifth distance sensor 5e and the horizontal distance Δx59 between the fifth distance sensor 5e and the ninth distance sensor 5i are approximately 380 mm.

  Further, the positional relationship among the fifth distance sensor 5e, the sixth distance sensor 5f, the seventh distance sensor 5g, and the eighth distance sensor 5h, and the ninth distance sensor 5i, the tenth distance sensor 5j, the eleventh distance sensor 5k, and the twelfth distance. The positional relationship of the distance sensor 5l is the same as the positional relationship of the first distance sensor 5a, the second distance sensor 5b, the third distance sensor 5c, and the fourth distance sensor 5d.

  The first distance sensor 5 a to the twelfth distance sensor 5 l are electrically connected to the control device 6. The control device 6 includes a calculation means in the present invention. The control device 6 calculates the suspension property of the cathode plate 2 based on the distance from each distance sensor acquired from the first distance sensor 5a to the twelfth distance sensor 5l to the cathode plate 2, and performs defect determination. Further, the control device 6 displays measurement data on the operation panel.

  The above measuring apparatus 1 is used by being incorporated in an apparatus for performing electrolytic refining by a permanent cathode method. FIG. 3 is an explanatory view showing a schematic configuration of an electrolysis apparatus 10 in which the suspension measuring apparatus 1 for the cathode plate 2 is incorporated. The electrolyzer 10 includes a measuring device 1, an electrolyzer 11, a first conveyor 12, a cleaning chamber 13, a stripping device 14, a second conveyor 15, and a reject conveyor 16.

  A copper sulfate solution is stored in the electrolytic cell 11, and a cathode plate 2 suspended from above and an anode plate 111 containing copper as a main component are charged in the solution. Copper in the solution is deposited on the cathode plate 2 by wiring the cathode plate 2 and the anode plate 111 and applying a current.

  When the copper adhering to the cathode plate 2 in the electrolytic cell 11 reaches a certain thickness, the cathode plate 2 is taken out from the electrolytic cell 11 and conveyed to the cleaning chamber 13 by the first conveyor 12. The first conveyor 12 supports and conveys both end sides of the beam 21 of the cathode plate 2.

  The cathode plate 2 passes through the cleaning chamber 13 while being conveyed to the first conveyor 12. At this time, the cathode plate 2 is washed.

  The cathode plate 2 that has passed through the cleaning chamber 13 is transferred from the first conveyor 12 to the transfer conveyor 4 and transferred to the stripping device 14. In the stripping apparatus 1, a flexing process for creating a gap between the cathode plate 2 and the electrodeposited copper, a chiseling process for inserting the chisel 141 into the created gap, grasping the copper with the clip 142, and peeling it from the cathode plate 2. Then, a down-end process is performed in which the peeled copper is laid down with the bottom of the cathode plate 2 as a base point, and the copper is peeled off from the cathode plate 2. The copper stripped off from the cathode plate 2 is sent to the steps of press processing and weighing processing.

  On the other hand, the cathode plate 2 from which the copper has been stripped is transported to the measurement position of the suspension measuring device 1 by the transporting conveyor 4. In the measuring apparatus 1, the suspension property is measured by a process described later.

  The cathode plate 2 that has finished the measurement of the suspendability by the measuring device 1 is judged whether or not the suspendability exceeds a specified value. The cathode plate 2 determined to be suspended within the specified value is returned to the electrolytic cell 11 by the second conveyor 15 and used again for electrolytic refining. On the other hand, the cathode plate 2 determined to exceed the prescribed value of the suspension property is removed from the electrolysis apparatus 10 by the reject conveyor 16. The second conveyor 15 and the reject conveyor 16 support and convey both end sides of the beam 21 of the cathode plate 2.

  Next, the operation of the measuring apparatus 1 will be described in detail. The cathode plate 2 is transported from the transport conveyor 4 to the measurement position of the measuring device 1. The cathode plate 2 stopped at the measurement position is pulled upward when the plate 32 rotated by the driving device 24 lifts the beam 21. The pulled-up cathode plate 2 is separated from the transfer conveyor 4 and is supported by the plate 32 and suspended. Here, the required time from when the cathode plate 2 stops at the measurement position to when the cathode plate 2 is pulled up is 0.6 seconds.

  The suspended cathode plate 2 swings in a pendulum shape around the beam 21. The measuring apparatus 1 waits for 1.0 second until this shake becomes stable. Thereafter, the measuring device 1 measures the distance to the cathode plate 2 in the shaken state for 1.8 seconds by the first distance sensor 5a to the twelfth distance sensor 5l. This measurement time of 1.8 seconds is an approximate period of the deflection of the cathode plate 2. By performing measurement for one period, the position farthest from the distance sensor and the closest position, that is, the maximum value and the minimum value of the distance between the cathode plate 2 and each distance sensor are acquired.

  When the first distance sensor 5a to the twelfth distance sensor 5l finish measuring the distance, the measuring apparatus 1 lowers the cathode plate 2 onto the conveyor 4 for conveyance. The time required for lowering the cathode plate 2 is 0.6 seconds. Therefore, the time required to measure one cathode plate 2 is 4.0 seconds.

  Next, a method for calculating the suspension property by the control device 1 will be described. FIG. 4 is an explanatory diagram showing an outline of the relationship between the cathode plate 2 in a shaken state and each distance sensor. 4A shows a state in which the cathode plate 2 is farthest from the distance sensor, and FIG. 4B shows a state in which the cathode plate 2 is closest to the distance sensor. In each of FIGS. 4A and 4B, the broken line indicates the position of the cathode plate 2 in a stationary state. As shown in FIG. 4, the swung cathode plate 2 performs a pendulum motion around the beam 21. The control device 6 calculates the suspension property of the cathode plate 2 based on the maximum value M and the minimum value m of the distance to the cathode plate 2 measured by each distance sensor.

  As described above, the control device 6 acquires the maximum value M and the minimum value m of the distance from each distance sensor to the cathode plate 2. Here, processing regarding data obtained from the first distance sensor 5a to the fourth distance sensor 5d will be described.

For each distance sensor, the control device 6 calculates the deflection width f from the measured maximum value M and minimum value m according to the following equation (1).
f = M−m (1)
Next, the control device 6 calculates the virtual stop position p by the following equation (2).
p = m + (f / 2) (2)
The control device 6 sets the virtual stop position of the first distance sensor 5a to p1, the virtual stop position of the second distance sensor 5b to p2, the virtual stop position of the third distance sensor 5c to p3, and the virtual stop position of the fourth distance sensor 5d. P4, (p2-p1), (p3-p1), (p4) with reference to the virtual stop position p1 of the first distance sensor 5a arranged on the upper side among the four distance sensors arranged in the vertical direction. The value of −p1) is defined as a suspension value. In the case of a cathode plate having ideal suspension properties, (p2-p1), (p3-p1), and (p4-p1) are 0.

  Similarly, in the processing regarding the data obtained from the fifth distance sensor 5e to the eighth distance sensor 5h, the difference from the virtual stop position of the fifth distance sensor 5e arranged on the uppermost side is determined as the suspension value. Similarly, in the processing regarding the data obtained from the ninth distance sensor 5i to the twelfth distance sensor 5l, the difference from the virtual stop position of the ninth distance sensor 5i arranged on the uppermost side is determined as the suspension value.

  Next, the measurement accuracy of the suspension property of the measuring apparatus 1 will be described with reference to experimental values. In the experiment, the suspended cathode plate 2 was artificially shaken, and the suspension value was measured from the values measured by the fifth distance sensor 5e to the eighth distance sensor 5h. The runout was measured at ± 1 mm, ± 7 mm, and ± 15 mm. FIG. 5A is an explanatory diagram showing the suspension value when the suspended cathode plate 2 is swung with different swing widths. The suspension value here is a value calculated from the measured value of the eighth distance sensor 5h, and shows two experimental values of Sample 1 and Sample 2. FIG. 5B is an explanatory diagram showing the suspension value calculated from the measured values of the fifth distance sensor 5e to the eighth distance sensor 5h of the sample 1 in the same experiment. Moreover, FIG. 6 is explanatory drawing which showed the value of FIG.5 (b) in the graph. As shown by the experimental values in FIG. 5 and the graph in FIG. 6, the suspension value could be calculated with an error within 0.1 mm even when the deflection width of the cathode plate was different. Thus, even when the cathode plate is swung, the suspension value of the cathode plate can be accurately calculated. Therefore, the virtual stationary position of the cathode plate can be specified regardless of the swing width.

FIG. 7 shows the result of measuring the suspension of the cathode plate by incorporating the measuring device 1 into the electrolysis apparatus 10 (on-line measurement) and the suspension of the cathode plate taken out from the electrolysis apparatus 10 and suspended. It is explanatory drawing which compared the result (offline measurement) measured. The horizontal axis on the graph of FIG. 7 indicates the suspension value by online measurement, and the vertical axis indicates the suspension value by offline measurement. The points in the graph indicate experimental values, and the straight lines in the graph indicate mathematical formulas calculated from the experimental values by the least square method. This formula is Y for offline measurement and X for online measurement.
Y = 0.99X (3)
R ² is represented by 0.95. Therefore, it can be said that the mathematical formula (3) has a high degree of fitness and high reliability. In equation (3), the slope 0.99 is approximately 1, and it can be said that the on-line measurement value and the off-line measurement value are substantially equal, which indicates that the measurement accuracy of the measurement apparatus 1 in this embodiment is high.

  From such an experimental result, the intermediate position calculated from the maximum value and the minimum value of the distance to the cathode plate 2 measured by the distance sensor approximates the position when the cathode plate 2 performing the pendulum motion is stationary. Therefore, the intermediate position calculated from the maximum value and the minimum value of the distance to the cathode plate 2 can be determined as a virtual stationary position, and the suspension property can be determined. In this embodiment, the suspension property of the virtually stopped cathode plate 2 can be determined from the vibrating cathode plate 2.

  As described above, in this embodiment, the suspension property is measured without waiting for the suspended cathode plate 2 to be stationary. The measuring time of the suspension property by the measuring apparatus 1 of this embodiment is only 4.0 seconds. Since it takes 30 seconds or more for the suspended cathode plate 2 to stop swinging and the cathode plate 2 to come to rest, the measuring device 1 of this embodiment for measuring the suspension property of the cathode plate 2 in the state of shaking is used for measurement. Significantly reduce the time required. Furthermore, in the electrolysis apparatus 10 of this example, the time required until the copper electrodeposited on the cathode plate 2 by the stripping device 14 is stripped is 7.2 seconds. For this reason, since the measuring apparatus 1 finishes the measurement of the suspension property of the cathode plate 2 within the time required for stripping of copper, the operation of the electrolyzer 10 is not delayed. Therefore, it is possible to measure the suspendability of all the cathode plates 2 from which the copper has been stripped. Thereby, the defective cathode plate 2 can be reliably detected.

  Further, in this example, when the suspension value of the cathode plate 2 is 7 mm or more, it is determined that the cathode plate 2 is defective. This is because the distance between the surfaces of the anode 111 and the cathode plate 2 in the electrolytic cell 11 is usually 26 mm, but when the suspension property exceeds 7 mm, the distance between the surfaces becomes less than 20 mm, and a short circuit is likely to occur. Out.

  When such a defective cathode plate is present in about 2% of the whole and the defective plate is short-circuited once every 18 days of the anode 1 life, the current efficiency is reduced by 0.2%. This can be prevented. In addition, by removing a defective cathode plate with a suspension property of 7 mm or more and using a normal cathode plate with a suspension property of less than 7 mm, the current efficiency is increased by 0.2%, and an increase in production of a copper plate of about 450 t can be expected. The reduction of power consumption by 0.2% can reduce the power cost by about 1,600,000 yen per year.

  Next, a second embodiment of the present invention will be described. The cathodic suspension measuring device of the present embodiment has the same configuration as the suspension measuring device 1 of the first embodiment. In the present embodiment, a method for calculating a virtual rest position from the cathode plate 2 in a shaken state is different from that in the first embodiment. In this embodiment, the time point of the intermediate value between the maximum value and the minimum value of the distance to the cathode plate 2 acquired by the distance sensor arranged at the bottom is calculated, and the position acquired by each sensor at that time point is the position of the cathode plate 2. It is a virtual still position. In addition, since the structure of the cooling device of a present Example is the same as Example 1, it demonstrates using the same reference number.

  Hereinafter, calculation of the virtual stationary position of the cathode plate 2 will be described in detail. The virtual stationary position of the cathode plate 2 is performed by the control device 6. The control device 6 records the measurement values of each distance sensor at 1 ms intervals. The control device 6 acquires the maximum value M and the minimum value m of the distance sensors (fourth distance sensor 5d, eighth distance sensor 5h, and twelfth distance sensor 5l) arranged at the bottom.

For each distance sensor, the control device 6 calculates the deflection width f from the measured maximum value M and minimum value m according to the following equation (4).
f = M−m (4)
Next, the control device 6 calculates the virtual stop position p by the following equation (5).
p = m + (f / 2) (5)
Next, the control device 6 selects a value closest to the value calculated in the formula (5) from the measured values of the distance sensor arranged at the lowermost part recorded at intervals of 1 ms, and the distance sensor measured at this time. Let the position of the cathode plate 2 be a virtual stationary position. In addition, a measurement value at the same time is selected from the measurement data of the distance sensor arranged above the distance sensor arranged at the bottom, and is set as the virtual stationary position of the cathode plate 2.

  By specifying the virtual stationary position in this way, also in the present embodiment, the suspension property of the cathode plate 2 in a swinging state can be measured. Suspension can be measured for the cathode plate.

  These examples are merely examples for carrying out the present invention, and the present invention is not limited to these examples. Various modifications of these examples are within the scope of the present invention, and Various other embodiments are possible within the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Suspension measuring apparatus 2 Cathode plate 21 Beam 3 Suspension part 4 Conveyor 5a 1st distance sensor 5b 2nd distance sensor 5c 3rd distance sensor 5d 4th distance sensor 5e 5th distance sensor 5f 6th distance sensor 5g 1st 7 distance sensor 5h 8th distance sensor 5i 9th distance sensor 5j 10th distance sensor 5k 11th distance sensor 5l 12th distance sensor 6 control device 10 electrolysis device 11 electrolysis tank 12 first conveyor 13 cleaning chamber 14 stripping device 15 2 conveyors 16 reject conveyors

Claims (7)

A suspension means for suspending a cathode plate for electrolysis;
Non-contact measuring means for measuring the distance to the cathode plate in a state of being hung and shaken by the suspension means;
An intermediate position calculated from the maximum value and the minimum value of the distance to the cathode plate measured by the measuring means is estimated as a virtual stop position when the shaken cathode plate is stationary, Arithmetic means for quantifying the suspension of the cathode plate based on the stop position ;
An apparatus for measuring the suspendability of a cathode plate, comprising:   2. The cathode plate suspension measuring device according to claim 1, wherein the measuring means is a plurality of distance meters arranged in parallel in the vertical direction.   2. The cathodic plate suspension measuring apparatus according to claim 1, wherein the measuring means includes a group of measuring instruments including a plurality of distance meters arranged in parallel in the vertical direction and arranged in parallel in the horizontal direction. 4. The cathode plate according to claim 2 , wherein the calculation means calculates the suspension property of the cathode plate based on a maximum value and a minimum value of a distance to the cathode plate measured by each of the plurality of distance meters. 5. Suspension measuring device. A stripping device for stripping the metal electrodeposited on the cathode plate by electrolytic refining;
The suspension property measuring apparatus for a cathode plate according to any one of claims 1 to 4 , which measures the suspension property of the cathode plate after stripping off the electrodeposited metal;
An electrolyzer comprising: Suspending the cathode plate after stripping the metal electrodeposited on the surface by electrolytic refining; and
Measuring the maximum value and the minimum value of the distance to the cathode plate in a non-contact manner while the suspended cathode plate is swinging;
An intermediate position calculated from the maximum and minimum values of the measured distance to the cathode plate is estimated as a virtual stop position when the shaken cathode plate is stationary, and based on the virtual stop position Quantifying the cathodic suspension of the cathode plate ;
A method for measuring the suspendability of a cathode plate, comprising: Removing the cathode plate for electrolysis from the electrolytic cell;
Stripping the electrodeposited metal from the cathode plate;
Suspending the cathode plate after stripping off the electrodeposited metal;
Measuring the maximum value and the minimum value of the distance to the cathode plate in a non-contact manner while the suspended cathode plate is swinging;
An intermediate position calculated from the maximum and minimum values of the measured distance to the cathode plate is estimated as a virtual stop position when the shaken cathode plate is stationary, and based on the virtual stop position A step of quantifying the value indicating the suspension of the cathode plate ;
Determining the suspension failure of the cathode plate, removing the cathode plate determined to be defective,
Returning the cathode plate that is not defective in the determination of the suspension of the cathode plate to the electrolytic cell;
A method for operating an electrolysis apparatus, comprising:

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