Anode correction device and thickness adjusting member used in the device

Abstract

To provide a technique by which even one worker can correct the ear part of an anode safely, easily, and quickly without an installation large-sized or complicated.SOLUTION: An anode correction device of the present invention is used for electrolytic refining, comprising: a reference block 12 in contact with the backside surface of an ear part C of an anode A; and a pressurizing block 13 provided to be accessible to and separable from the reference block 12. The reference block 12 comprises: a block body 21 including a contact surface facing the pressurizing block 13 and fixed to a device frame 1F located on the opposite side to the contact surface with a bolt 14; and a thickness adjustment member 22 inserted attachably / detachably between the block body 21 and the device frame 1F. A notch 22N is formed from the lower end part of the thickness adjustment member 22 in the height direction. The thickness adjustment member is fixed by passing the bolt 14 used for fixing the block body 21 through the notch 22N.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an anode correction device for correcting a distorted anode, and a thickness adjusting member used in the device. [Background technology]

[0002] Electrolytic smelting is a method for producing high-purity metals. In electrolytic smelting, anodes (electrodes made of low-purity target metals or electrodes that do not dissolve in the electrolyte) and cathodes are alternately immersed in an electrolytic cell filled with an electrolyte, and a current is passed through them to electrodeposit high-purity metals onto the surface of the cathode seed plate, producing products. The current-passing process (electrolysis process) in this type of electrolytic smelting consumes a large amount of electricity, so there is a need to reduce power consumption in order to improve the production efficiency of electrolytic smelting.

[0003] To reduce power consumption in electrolytic refining, the anode and cathode are arranged at a distance suitable for electrodeposition. However, if the distance between the anode and cathode is changed from the appropriate distance, the power consumption will change accordingly.

[0004] For example, if the distance between the anode and cathode is too large, the electrical resistance of the electrolyte increases, requiring more power for electrodeposition. On the other hand, if the distance between the anode and cathode is too small, power consumption can be reduced, but as electrodeposition progresses on the cathode seed plate, some of the electrodeposited metal may come into contact with the anode. If such contact occurs, current will flow directly from the anode to the cathode, resulting in wasted power. Therefore, in order to reduce power consumption and prevent wasted power, it is necessary to maintain an appropriate distance between the anode and cathode in the electrolytic cell.

[0005] Both the anode and the cathode are supported by bus bars and insulating plates, which are electrodes installed at the top of the electrolytic cell, and are suspended in the electrolytic cell. Therefore, the verticality of the electrodes affects the distance between the anode and the cathode in the electrolytic cell. In other words, since the vertical distortion of the electrodes has an effect, it is important to minimize the distortion of the electrodes.

[0006] The anode is manufactured by casting into the shape shown in FIG. 5. That is, the anode A is cast integrally with a main body B and a pair of ears C, C provided on both sides of the upper part of the main body B. The pair of ears C, C of the anode A serve as supports for suspending the anode A when the anode A is immersed in an electrolytic cell, and also function as contact points with the bus bar. Therefore, in order to maintain good contact with the bus bar and stably suspend the anode A, the lower parts of the pair of ears C, C are cut to be flat.

[0007] However, in the mold used to cast the anode A, a slight slope or step is formed on the inner bottom surface of the mold to make it easier to strip the anode. Therefore, the positions of the pair of ears C, C of the anode A are formed at positions slightly offset in the thickness direction of the anode A from the back side (the side that was in contact with the bottom of the mold) to the front side (the side facing the molten metal surface in the mold).

[0008] Specifically, as shown in FIG. 6, the pair of lugs C, C of the anode A are offset toward the front surface side from the center line X, X' passing through the center of gravity G of the main body B of the anode A (FIG. 6(A)). Therefore, even if the lower portions of the pair of lugs C, C are machined flat, when the anode A is inserted into an electrolytic bath, the anode A swings about point P as a fulcrum and changes its posture so that the plane including points P, P where the lugs contact the bus bar and the center of gravity G faces vertically (FIG. 6(B)). In other words, the anode A changes its posture so that its front surface is inclined relative to the vertical. As a result, when the anode A is immersed in an electrolytic bath, the distance to the cathode of the lower end of the main body B of the anode A on the front surface side (the left side in FIG. 6) is shorter than that of the upper end, and the distance to the cathode of the back surface side (the right side in FIG. 6) is longer. In other words, even if the anode A is placed so that the distance to the cathode is appropriate at the top of the electrolytic cell and immersed in the cell, the distance between the anode A and the cathode at the bottom of the main body B (i.e., the main body B in the electrolytic cell) will be different. This may result in contact between the anode A and the cathode as described above, which may reduce the production efficiency of electrolytic refining.

[0009] Therefore, in order to correct the misalignment of the pair of ear portions C, C of the anode A, i.e., the misalignment with the center line X, X' passing through the center of gravity G of the main body portion B of the anode A, the anode A is press-processed (for example, Patent Documents 1 and 2, etc.).

[0010] Specifically, the pair of lugs C, C are pressed and bent toward the back side by press working, and corrected so that point P, where the lugs contact the bus bar, overlaps with center line X, X' passing through center of gravity G of main body B of anode A. By correcting in this way, when anode A is loaded into an electrolytic cell, the plane including points P, P, where the pair of lugs C, C contact the bus bar, and center of gravity G can be oriented close to vertical. This effectively prevents anode A from tilting when immersed in an electrolytic cell. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-122254 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-41612 Summary of the Invention [Problem to be solved by the invention]

[0012] As described above, when the pair of lugs C, C of the anode A are pressed to appropriately adjust the positions of the lugs C, C, any change in the thickness of the pair of lugs C, C requires a change in the amount by which the lugs C, C are pressed. Therefore, it is necessary to adjust the amount of deformation of the lugs C, C during press processing in accordance with the thickness of the anode A (i.e., the thickness of the pair of lugs C, C).

[0013] Conventionally, the deformation amount of the pair of lugs C, C was adjusted by changing the thickness of the receiving die located on the back side. However, changing the thickness of the receiving die required removing and reinstalling the receiving die each time. Changing the receiving die requires approximately 25 to 30 minutes of work, and the equipment must be shut down while the receiving die is being changed. On days when the equipment is in operation, stopping the equipment for even 25 to 30 minutes significantly affects other processes, so the receiving die is changed on days when the equipment is not in operation. However, because the thickness of the anode A, including the pair of lugs C, C, varies by approximately 5 mm or less depending on the day when the anode A is manufactured, it is difficult to properly adjust the deformation amount of the lugs C, C if the receiving die is changed only on days when the equipment is not in operation.

[0014] For example, Patent Document 1 discloses an apparatus for straightening an anode A used in electrolytic refining. Specifically, the anode straightening apparatus includes a reference block that contacts the back surface of the lug C of the anode A and a pressure block that is movable toward and away from the reference block. The reference block includes a block body having a contact surface that faces the pressure block and a thickness adjustment member that is detachably attached to the block body. The thickness adjustment member includes a contact member that is placed on the contact surface of the block body, a fixing portion that fixes the contact member to the block body, and the thickness adjustment member that is detachably attached to the block body. This anode straightening apparatus is advantageous because it allows the lug of the anode to be straightened simply and quickly without increasing the size and complexity of the equipment.

[0015] However, in the anode correction device disclosed in Patent Document 1, the thickness adjusting member has a complex shape including a contact member, an insert member, and a connecting member, and is detachably attached to the block body, but the fixing method is complicated as described below. That is, Patent Document 1 discloses that the thickness adjusting member "may be fixed to the block body 11 with a bolt or the like. For example, holes into which bolts or the like can be fixed are drilled in the top or side surface of the block body 11, and a fixing plate placed on the top or side surface of the block body 11 is provided as a fixing part. The fixing plate is then provided with a through-hole through which the bolt or the like can be inserted" (paragraph

[0047] ), and further discloses that "the thickness adjusting member 12 can be fixed to the block body 11 by inserting a bolt or the like through the through-hole of the contact member 12a and then inserting the bolt or the like into the hole in the block body 11" (paragraph

[0048] ). Therefore, when such a thickness adjustment member is fixed, in order to remove it, at least the bolt must be removed from the through hole of the contact member, and the work of loosening the bolt and the work of holding the thickness adjustment member after removal must be performed simultaneously, which poses a problem in that, from a safety perspective, it is difficult for a worker to perform this task alone.

[0016] Furthermore, Patent Document 2 discloses a technique for correcting the perpendicularity of an anode, which automates the correction of the perpendicularity of an anode and enables the time required for correcting the perpendicularity to be shortened. Specifically, the technique discloses a technique for using a perpendicularity measuring device that includes a verticality measuring device that measures data related to the perpendicularity of an anode and a lug perpendicularity press that corrects the angle of the backside of the lug that is suspended and supported in an electrolytic cell by pressing the lug receiving portion on which the lug of the anode is placed, and adjusting the angle of the lug receiving portion based on the measurement data from the verticality measuring device so that the perpendicularity is corrected.

[0017] However, this method requires devices such as a perpendicularity measuring device, a control unit, and a drive mechanism, which increases the size of the device and increases costs.

[0018] The present invention has been proposed in view of the above circumstances, and aims to provide a technique that enables a single worker to safely, easily, and quickly correct the ear portion of an anode without increasing the size and complexity of the equipment. [Means for solving the problem]

[0019] As a result of extensive research, the inventors have found that the above-mentioned problems can be solved by using a thickness adjusting member with a predetermined notch formed in it for adjusting the thickness of the reference block in an anode correction device that performs pressure correction by sandwiching an object between a reference block and a pressure block, and have thus completed the present invention.

[0020] (1) A first aspect of the present invention is an apparatus for correcting an anode used in electrolytic refining, comprising: a reference block that contacts the rear surface of the ear of the anode; and a pressure block that is provided so as to be movable toward and away from the reference block. The reference block has a contact surface that faces the pressure block. The reference block is provided with a block body that is fixed with a bolt to an equipment frame located on the opposite side of the contact surface. The anode correction apparatus further comprises: a thickness adjustment member that is detachably inserted between the block body and the equipment frame; and a notch formed in the thickness adjustment member from its lower end in the height direction, and the thickness adjustment member is inserted and fixed by passing the bolt that fixes the block body through the notch.

[0021] (2) The second invention of the present invention is an anode correction device according to the first invention, wherein the block body is fixed to the device frame with two or more bolts, and the thickness adjustment member has notches formed in the number corresponding to the number of the bolts.

[0022] (3) A third aspect of the present invention is a thickness adjustment member for use in an apparatus for correcting an anode used in electrolytic refining, the apparatus comprising a reference block that contacts the rear surface of the ear of the anode and a pressure block that is movable toward and away from the reference block, the reference block in the apparatus having a contact surface facing the pressure block and a block body that is fixed with a bolt to an apparatus frame located on the opposite side of the contact surface, the thickness adjustment member having a predetermined thickness and a notch formed in the height direction from its lower end, and the thickness adjustment member is fixed by passing the bolt between the block body and the apparatus frame through the notch. [Effects of the Invention]

[0023] According to the present invention, the ear portion of an anode can be corrected safely, easily, and quickly by a single worker without increasing the size and complexity of the equipment. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 2 is a side view of a main part of the anode correction device. [Figure 2] FIG. 2 is a cross-sectional view of a main part of an anode correction device. [Figure 3] 5A and 5B are diagrams illustrating an example of the configuration of a thickness adjusting member. [Figure 4] FIG. 1 is a process diagram showing an example of the flow of an anode correction method. [Figure 5] FIG. 2 is a diagram showing the configuration of an anode. [Figure 6] 1 is an explanatory diagram showing the relationship between the center of gravity G of the anode body and the position P where the ear contacts the bus bar or the like. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0025] Specific embodiments of the present invention (hereinafter referred to as "present embodiments") will be described below. Note that the present invention is not limited to the following embodiments, and various modifications are possible within the scope of the present invention.

[0026] ≪1. About anode orthodontic devices≫ The anode straightening device according to this embodiment is a device for straightening an anode used in electrolytic refining, and is a device for straightening distortions that occur during casting, for example, by pressing the ears of the anode.

[0027] FIG. 1 is a side view of the main parts of an anode correction device according to this embodiment. FIG. 2 is a cross-sectional view of the main parts of the anode correction device. FIGS. 1 and 2 show the state in which an anode A to be corrected is installed and the anode correction device is in use. In FIGS. 1 and 2, the anode to be corrected is indicated by the symbol "A." The anode A comprises a main body B and a pair of ears C, C. The anode A is suspended from an electrolytic cell by the pair of ears C, C, and in that state is immersed in the electrolyte in the electrolytic cell for electrolytic refining.

[0028] Specifically, the anode correction device 1 is composed of an anode holding part 11 that holds the anode A, a reference block 12 that contacts the backside of the ear parts C, C of the anode A, and a pressure block 13 that is provided so as to be able to move towards and away from the reference block 12. The reference block 12 also includes a block body 21 that has a contact surface facing the pressure block 13 and is fixed with bolts 14 to the device frame 1F located on the opposite side of the contact surface, and a thickness adjustment member 22 that is detachably inserted between the block body 21 and the device frame 1F.

[0029] In the anode correction device 1, a reference block 12 and a pressure block 13 are arranged to sandwich the anode A, with the anode A held by the anode holding part 11. Specifically, the reference block 12 is arranged on the back side of the anode A (the right side in FIG. 1, the upper side in FIG. 2), and the pressure block 13 is arranged on the front side of the anode A (the left side in FIG. 1, the lower side in FIG. 2). Then, the pressure block moving mechanism 15 moves the pressure block 13 toward and away from the reference block 12.

[0030] In this way, by moving the pressurizing block 13 toward the reference block 12, the pressurizing block 13 presses the pair of ears C, C of the anode A toward the reference block 12. Then, the pair of ears C, C are sandwiched between the pressurizing block 13 and the reference block 12 and corrected.

[0031] [Anode holder] The anode holder 11 holds the anode A in a suspended state. A pair of ears C, C of the anode A to be corrected are placed on the upper surface of the anode holder 11, which holds the anode A in a suspended state. The structure of the anode holder 11 is not particularly limited as long as it can hold the anode A, and can be formed, for example, by a rod-shaped member installed so that the upper surface is horizontal. Alternatively, the anode may be supported by a U-shaped member or a mechanism such as a vice.

[0032] In the anode correction device 1, in a state where the anode A is held by the anode holding part 11, a reference block 12 and a pressure block 13, which will be described later, are arranged so as to sandwich the anode A therebetween.

[0033] [Reference Block] As described above, the reference block 12 includes a block body 21 that has a contact surface facing the pressure block 13 and is fixed with bolts 14 to the device frame 1F located on the opposite side of the contact surface, and a thickness adjustment member 22 that is detachably inserted between the block body 21 and the device frame 1F. By freely attaching and detaching the thickness adjustment member 22, the thickness of the reference block 12, that is, the amount of deformation when the pressure block 13 presses the pair of ears C, C, can be adjusted.

[0034] (Block body) The block main body 21 constitutes the reference block 12 and has a contact surface facing the pressurizing block 13. The "contact surface" of the block main body 21 is the surface facing the pressurizing block 13 and coming into contact with the anode A sandwiched between the block main body 21 and the pressurizing block 13.

[0035] 1 and 2, the block main body 21 is a substantially rectangular parallelepiped block. The back surface (the surface opposite to the contact surface) of the block main body 21 is fixed to the device frame 1F so that the front surface (i.e., the surface (contact surface) facing the pressurizing block 13) is substantially parallel to the surface (pressurizing surface) of the pressurizing block 13.

[0036] Here, the block body 21 is fixed to the equipment frame 1F located on the opposite side of the above-mentioned contact surface by bolts 14. Specifically, bolts 14 are provided perpendicular to the respective faces of the equipment frame 1F and the block body 21 so as to bridge the gap between the equipment frame 1F and the block body 21, thereby fixing the block body 21 to the equipment frame 1F.

[0037] The number of bolts 14 is not particularly limited, but is preferably two or more. Furthermore, the positions of the bolts 14 are preferably such that two or more bolts 14 are arranged side by side at a predetermined interval in the horizontal direction.

[0038] (Thickness adjustment member) The thickness adjustment member 22 is removably inserted and attached between the block main body 21 and the device frame 1F, and is intended to adjust the thickness of the reference block 12 composed of the block main body 21 and the thickness adjustment member 22.

[0039] FIG. 3 shows an example of the configuration of the thickness adjusting member 22, and mainly shows a front view of the thickness adjusting member 22, as well as a plan view, a right side view, and a bottom view. As shown in FIG. 3, the thickness adjusting member 22 has a plate-like shape with a predetermined thickness. In the anode correction device 1, a set of thickness adjusting members 22 with different thicknesses is prepared, and thickness adjusting members 22 of various thicknesses can be selected and used depending on the degree of deformation (degree of distortion) of the anode A to be corrected.

[0040] As described above, the thickness adjusting member 22 is detachably inserted and attached between the block main body 21 and the device frame 1F. By selecting and using an appropriate thickness adjusting member 22 depending on the deformation amount of the anode A, the thickness of the reference block 12 can be freely changed. This makes it possible to adjust the deformation amount of the ear portion C of the anode A, which is sandwiched between the reference block 12 and the pressure block 13 and pressurized and corrected, simply by changing the thickness adjusting member 22 to one with an appropriate thickness. This makes it possible to easily and quickly adjust the deformation amount of the ear portion C.

[0041] 3, a notch 22N is formed in the thickness adjusting member 22 in the height direction from the lower end portion thereof. The thickness adjusting member 22 is fixed by inserting the bolt 14, which fixes the block body 21 to the device frame 1F, into the notch 22N.

[0042] The thickness adjusting member 22 having such a shape can be attached between the device frame 1F and the block body 21 by the simple operation of inserting the thickness adjusting member 22 from above so that the notch 22N is aligned with the installation position of the bolt 14. Moreover, since the thickness adjusting member 22 is attached so that the bolt 14 is clamped by the notch 22N, it hardly moves left and right even during press working, and can be held stably.

[0043] Furthermore, when removing the thickness adjusting member 22, it can be removed by the extremely simple operation of simply pulling out the thickness adjusting member 22 attached between the device frame 1F and the block main body 21 upward. Therefore, even when selecting an appropriate thickness adjusting member 22 depending on the amount of deformation of the anode A to be corrected, the operation can be completed in a short time, and it is also possible to improve the accuracy of selecting an appropriate thickness adjusting member 22. This in turn improves the accuracy of the correction of the anode A.

[0044] In the past (for example, the technology of Patent Document 1), thickness adjustment members were fixed to the block body by bolting. However, when correcting the anode A, it was necessary to select and replace an appropriate thickness adjustment member to adjust the deformation amount, and the thickness adjustment member had to be bolted each time, which was an extremely cumbersome task for a single worker. In contrast, the thickness adjustment member 22 in the anode correction device 1 according to the present embodiment, as described above, does not require operations such as bolting, can be stably fixed and attached, and can be easily removed during replacement work, so that the work can be performed safely, extremely simply, and quickly by a single worker.

[0045] In thickness adjusting member 22, the shape of notch 22N is not particularly limited, and it need only be of a size and shape that allows bolt 14 to pass through. Note that if the widthwise size of notch 22N is too larger than the diameter (diameter of the circumscribed circle) of bolt 14, stability may be compromised when thickness adjusting member 22 is attached, so it is preferable that the widthwise size be slightly larger than the diameter of the bolt. In Figure 3, the dashed line portion shown at the portion of notch 22N indicates the cross-sectional shape of bolt 14.

[0046] The number of notches 22N is preferably set to correspond to the number of bolts 14 between the device frame 1F and the block body 21, and is preferably two or more. Stability can be improved by forming two or more notches 22N and attaching the bolts 14 so that they are sandwiched between the respective notches 22N. Note that Fig. 3 shows an example in which two notches 22N are formed corresponding to two bolts 14.

[0047] ≪2. About the anode correction method≫ Next, a description will be given of a method for straightening an anode using the above-described anode straightening device 1. As described above, the anode straightening method is a method for straightening an anode A that has been distorted during casting by applying pressure thereto.

[0048] Specifically, the anode straightening method comprises a preliminary straightening step S1 and a main straightening step S2, as shown in Fig. 4. The preliminary straightening step S1 also includes an anode selection step S11 for selecting an anode A to be straightened, a preliminary straightening step S12 for performing preliminary straightening on the selected anode A, and a thickness adjusting member selection step S13 for selecting a thickness adjusting member 22 based on the results of the preliminary straightening.

[0049] [Preliminary correction process] The preliminary straightening step S1 is a step of measuring the degree of distortion of the anode A to be straightened prior to the main straightening (S2) and selecting and determining an appropriate thickness adjustment member 22 to be used in the straightening work using the anode straightening device 1.

[0050] As described above, by selecting and using an appropriate thickness adjusting member 22 depending on the amount of deformation of the anode A, the thickness of the reference block 12 can be freely changed, and this makes it possible to adjust the amount of deformation of the ear C of the anode A that is clamped and pressurized and corrected between the reference block 12 and the pressure block 13. Thus, selecting an appropriate thickness adjusting member 22 is an important task when correcting the anode A, and also leads to improved accuracy of the correction.

[0051] (Anode selection process) In the preliminary straightening step S1, first, anodes A to be straightened are selected. Specifically, from among anodes A obtained in the same lot of anode casting (cast using the same molten metal), several anodes A that are visually checked to have no abnormalities such as bulging or warping are selected.

[0052] (Preliminary correction process) Next, preliminary straightening is performed on the selected anodes A using the anode straightening device 1. At this time, the thickness of the thickness adjusting members 22 is changed by the number of selected anodes A, and the preliminary straightening work is performed using each thickness adjusting member 22.

[0053] (Thickness adjustment material selection process) Then, based on the straightening results of the anodes A straightened by the preliminary straightening operation, a thickness adjusting member 22 with an appropriate thickness is selected. Specifically, each of the anodes A that have been pre-straightened (straightened) is suspended in an electrolytic bath, and the perpendicularity is evaluated using a predetermined measuring jig. In other words, the straightening effect of the preliminary straightening is evaluated. Note that the method for evaluating the perpendicularity of the anodes A is not particularly limited.

[0054] This allows the anode A with the best verticality to be identified among the multiple anodes A that have undergone preliminary correction, and the thickness adjustment member 22 used to correct that anode A is selected as the thickness adjustment member 22 to be used for the main correction of anodes A from the same lot.

[0055] Here, in the preliminary straightening step S1, the preliminary straightening of the selected anodes A is performed using thickness adjusting members 22 each having a different thickness. According to the anode straightening device 1, the thickness adjusting members 22 have notches formed in the height direction from the lower end, and the bolts 14 that fasten the block body 21 and the device frame 1F are inserted and fixed into the notches, so that the attachment and detachment operations are extremely simple and can be performed quickly.

[0056] This allows preliminary straightening to be performed efficiently without requiring a long time, even when straightening work is performed on a plurality of anodes A using thickness adjusting members 22 with different thicknesses. Furthermore, because preliminary straightening can be performed with such a simple operation, the accuracy of selecting an appropriate thickness adjusting member 22 can be improved.

[0057] [Main correction process] In the main straightening step S2, the main straightening is performed on the anodes A from the same lot as the anodes A targeted in the preliminary straightening step S1, using the thickness adjusting member 22 having the predetermined thickness selected in the preliminary straightening step S1.

[0058] In this main straightening, since an appropriate thickness adjusting member 22 is selected in the preliminary straightening step S1, it is possible to apply pressure and straighten the ear C of the anode A where distortion has occurred with an appropriate amount of deformation, thereby enabling highly accurate straightening. [Example]

[0059] The present invention will be explained in more detail below by showing examples, but the present invention is not limited to the following examples in any way.

[0060] [Example 1] In Example 1, the anode A was subjected to correction using the anode correction device 1 equipped with the thickness adjusting member 22 shown in FIGS.

[0061] As a result, one worker was able to safely replace five thickness adjusting members 22 to adjust the amount of deformation in the anode straightening work in a short time (5 to 10 minutes per replacement).

[0062] [Comparative Example 1] In Comparative Example 1, unlike Example 1, the anode A was corrected using an anode correcting device in which the thickness adjusting member was fixed by bolting.

[0063] As a result, the work was stopped because it took more than 20 minutes to replace one thickness adjustment member to adjust the deformation amount during the anode straightening work.

[0064] [Example 2] In Example 2, when performing the correction work on the anode A using the anode correction device 1 equipped with the thickness adjusting member 22 shown in Figures 1 to 3, a series of anode correction methods was carried out, which consisted of a preliminary correction step (S1) in which the thickness adjusting member 22 was selected, and a main correction step (S2).

[0065] Specifically, in the preliminary straightening step S1, first, five anodes A from the same lot were selected. Next, thickness adjusting members 22 of different thicknesses (five types shown in Table 1 below; a thickness of 0.0 mm means that no thickness adjusting member was used) were prepared for each of the five selected anodes A, and preliminary straightening was performed. The anode straightening device 1 was used for the preliminary straightening. Then, the perpendicularity of each of the five anodes A after preliminary straightening was measured, thereby evaluating the straightening effect of the preliminary straightening.

[0066] The results of measuring the perpendicularity of the five pre-straightened anodes A are shown in Table 1. The perpendicularity was evaluated by measuring the distortion (absolute value) at nine points on the body of the anode A after pre-straightening, and Table 1 shows the average absolute value of the distortion.

[0067] [Table 1]

[0068] As shown in Table 1, in the straightening operation using the thickness adjusting member 22 with a thickness of 1.0 mm, the distortion of the anode A after straightening was the least. Therefore, it was decided to use the thickness adjusting member 22 with a thickness of 1.0 mm for the straightening of the anode A of that lot using the anode straightening device 1.

[0069] Next, in the main correction step S2, the thickness adjusting member 22 having a thickness of 1.0 mm was used to perform the main correction on the anodes A (50 pieces) of the same lot.

[0070] As a result, the absolute distortion value for all anodes A after this straightening was within 1.5 mm, which meant that the straightening was effective and the accuracy of the straightening was improved.In addition, since re-straightening was no longer necessary, the overall time for the straightening work was shortened. [Explanation of symbols]

[0071] 1 Anode straightening device 1F Equipment Frame 11 Anode holder 12 Reference Blocks 21 Block body 22 Thickness adjusting member 22N cutting depth 13 Pressure Block 14 volts 15 Pressure block movement mechanism

Claims

1. 1. An apparatus for correcting an anode used in electrolytic smelting, comprising: a reference block that contacts the rear surface of the ear of the anode; a pressure block provided so as to be movable toward and away from the reference block, The reference block is a block body having a contact surface facing the pressurizing block and fixed with bolts to an apparatus frame located on the opposite side of the contact surface; a thickness adjusting member detachably inserted between the block body and the device frame, The thickness adjusting member has a notch formed in the height direction from its lower end, and the bolt that fixes the block body is inserted and fixed into the notch. Anode straightening device.

2. the block body is fixed to the device frame by two or more bolts; The thickness adjusting member has notches formed in a number corresponding to the number of the bolts. The anode straightening device of claim 1 .

3. A thickness adjusting member for an apparatus for correcting an anode used in electrolytic refining, comprising: The device comprises: The anode pressure sensor includes a reference block that contacts the rear surface of the ear portion of the anode, and a pressure block that is provided so as to be able to approach and move away from the reference block. The reference block in the device is a block body having a contact surface facing the pressure block and fixed with bolts to an apparatus frame located on the opposite side of the contact surface; The thickness adjusting member has a predetermined thickness, and a notch is formed in the height direction from the lower end thereof, and the bolt between the block body and the device frame is inserted and fixed into the notch. Thickness adjustment member.

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