JPS59133387A - Anode shaping method - Google Patents

Abstract

PURPOSE:To shape easily, surely and efficiently an anode by upsetting the anode accepted in a perpendicular state, straightening the sectional shape thereof in a horizontal state, measuring the weight and thickness thereof, expelling the defective, and subjecting the non-defective to edge working. CONSTITUTION:A metallic anode A for electrolysis produced in a smelting factory is kept supported and suspended at edges E and is carried into an accepting stage 1 where the anode is repositioned to a horizontal state by an upsetting device 2 and is carried on the 1st walking conveyor WC1 by which the anode is carried into a straightening stage 3. The bend, camber, twist, etc. of the anode A are straightened by a press device P in said stage and after the sectional shape is straightened, the anode is passed through a weight measuring device 4 and a thickness measuring device 5. The defective anode AN is expelled in a defective anode expelling stage 6 by a discharging stage 8. The non-defective anode AG is carried by the 2nd walking conveyor WC2 into edge working stages 9, 10, where the lower parts F of the edges E are cut and ground by automatic rotating tools MC1, MC2. The anode AG after the shaping is again positioned in the suspended state by an upsetting device 11 and is discharged from a discharging stage 12.

Description

[Detailed description of the invention] The present invention relates to a method for shaping a metal anode for electrolysis.

'Electrolysis of metals'! In manufacturing, it is required to reduce the distance between the anode and cathode in the electrolytic cell by an amount equal to 100% in order to improve the electrolytic capacity per unit floor area and reduce costs.

Crude copper, crude nickel, crude lead, crude tin, etc. obtained through smelting are made into a rectangular plate shape with ears E and E extending from both ends of one edge to the right of the craftsman, as shown in Figure 1. E and E, which are hung on the edge of the electrolytic cell, are used as anodes A to perform electrolysis. This anode A is cast by an open horizontal mold, which is the simplest to control, and is most commonly carried out by casting, in which automatically weighed molten metal is poured into the mold.

The mold has a concave side surface inclined outward to facilitate removal of the cast anode A from the mold. Therefore, the peripheral edge of the pressed anode A is also obliquely inclined.

Inside the electrolytic cell, a thin plate of refined metal is hung vertically as a cathode, and when the anode A, which was cast in the manner described above, is suspended from the electrolytic cell by hooking the ears E and E, a common ear E is formed. The lower part F is perpendicular to the wide surface of the anode A.
Because it is tilted and not centered on the edge of the electrolytic cell, the anode A is not vertical but is tilted to the vertical, causing a short circuit with the cathode and the anode. This causes non-uniform dissolution of A, resulting in poor electrodeposition of the electrolytic product and an increase in electrolytic power and switching rate. The defective anode A is not due to the inevitable inclination of the lower part F of the common ear E as described above, but is due to the casting and casting, and these anode defects are also caused by electrolysis. This will cause a decline in grades.

In order to avoid this problem, a liner such as a copper piece is placed between the lower part F of the ear E of the anode A, and the anode A is visually adjusted to be vertical. However, this adjustment takes a lot of manpower and time. It takes. In addition to problems with the vertical suspension and other external shapes of the anode A, low contact resistance with a conductor is also an essential condition in metal electrolysis. and anode A
Since the conductor is maintained only by the contact pressure between the conductor and the lower part F of the ear E due to its own weight, the presence of dirt, foreign matter, oxide layer, etc. on the lower part F of the ear E will increase the contact resistance. Although directly connected, these problems cannot be avoided as long as the as-cast anode A is used, and it is absolutely necessary to cut or polish the lower part F of the ear E.

The present inventors added a method of selecting and eliminating defective anodes that cannot be corrected with a shaping device to the anode shaping method to solve these problems, and as a result of searching for the most efficient system, the anode shaping method We came to the conclusion that it is desirable to perform the shaping process in a horizontally supported position as much as possible, and by pursuing this, we arrived at the present invention as described below.

That is, as described in the claims, the configuration of the present invention is such that at least necessary In an anode shaping method that includes a shaping process and a defective anode discharge process,
The anode shaping method is characterized in that the shaping step comprises at least the steps of correcting the cross-sectional shape of the anode while holding the anode in a horizontally supported state, and cutting or polishing the lower part of the ear of the anode.

Next, one example of the method of the present invention will be explained with reference to the drawings.

Metal anode A (e.g., copper to anode) produced at a smelting factory is transported directly from the smelting factory or from an unformed anode stockyard by truck, forklift, crane, conveyor, etc., and is usually transported from both ears of anode A. E and E are supported and suspended and transported to the receiving process 1. Therefore, the acceptance process 1 of this system is
One or more anodes A are received in a vertically suspended state supported by both ears E and E, and the anode A is placed vertically in a direction substantially perpendicular to the line connecting the ears E and E.
The anode A is fed one by one to the reversing device 2, and the anode A is changed from the vertically suspended state to the horizontally supported state on the starting end of the next first walking conveyor WcI.

As shown in FIGS. 2 and 3, the walking conveyor wc has a flow direction substantially perpendicular to the carrying direction of the receiving step 1, and corrects the cross-sectional shape of the anode A during the flow. A brace device P for cross-sectional shape correction stage 3 is provided. Here, the above-mentioned correction of the cross-sectional shape refers to correcting the bending, reversing, and twisting of the anode A, or further adjusting the cross-section so that it has a desired desired shape.

Also, on the terminal side of the walking conveyor WC, there is a single weight measurement stage 4 for measuring the weight of each anode A, and a valley anode A.
A thickness measurement step 5 for measuring the thickness of the anode, and a defective anode elimination step 6 for removing defective anodes AN which have failed in weight in the unit weight measurement step 4 or failed in thickness in the thickness measurement step 5 are provided.

The anode A, which is horizontally supported on the starting end of the walking conveyor wc1, is conveyed by the operation of the walking conveyor WC1 shown in FIG. 3, and is subjected to a correction process along the way. That is, the walking conveyor WC
1 is moved downstream, in other words, leftward in the drawing in FIG. 3 by a stroke d, and the first anode A1 reaches the positioning position of the press device P as shown in FIG. 3(B). In this state, the walking conveyor WC1 is lowered, and the anode A1 is placed on the anode receiver PH of the press device P from the walking conveyor WC, and is transferred to the press device 3 with both ears E and E while being horizontally supported. Several places on the anode A1 body are pressed to correct the cross-sectional shape.

While the anode A1 is being corrected, the walking conveyor WC is returned to the upstream side by a stroke d in a downward state as shown in FIG. 3(C), that is, to the right side of the drawing in FIG. 3(C). The walking conveyor WC1 is raised as shown in FIG. 3 (■). Then, as shown in Figure 3 (Q), the stroke d is downstream again, that is, the third
Figure (5)) The anode A1 on the walking conveyor WC is moved to the drawing pressure side, and is conveyed from the positioning position of the press P to the unit weight measurement stage 4 side, and the anode A2 and anode A1 of the next Era 2 The lowering of the main body reaches the positioning position of the press release device P in the same manner. In this way, the anode A whose cross-sectional shape has been corrected is sequentially conveyed to the unit weight measuring stage 4, but on the way, the touch sensor device of the thickness measuring stage 5 detects that the cross-sectional shape is too thick or the cross-sectional shape is too thick.・An uncorrected anode is detected as a defective anode whose thickness is rejected. In the unit weight measuring step 4, the unit weight is measured by operating the load cell only on the anodes whose thickness passes the test, and anodes whose weights are outside a predetermined weight range are detected as the anodes whose weight does not pass. In the end, the defective anode AN whose thickness was rejected in the thickness measurement step 5 or whose weight was rejected in the single weight measurement step 4 is removed from the walking conveyor WC1 by the removal device in the defective anode removal step 6, and is turned over. After being changed from the horizontally held state to the vertically suspended state by the device 7, both ears E and E of the good anode AN are supported and carried out in a step 8 for carrying out the defective anode.

On the other hand, the non-defective anodes AG which passed the thickness test in the thickness measurement stage 5 and passed the weight test in the single weight measurement stage 4 are sequentially conveyed in two horizontally supported '81-1 series to the walking conveyor wc2. It is placed in a horizontally supported state on the starting edge of wc3°.

The above-mentioned eking conveyors WC2 and MC3 are similar to the above-mentioned walking conveyor vVC, and as shown in FIGS. 2 and 4, each of them has a non-defective anode A in the middle of the flow. Reprocessing step 9 of cutting or polishing the lower part of the ear.
, 1o processing machines 1vIC, , MC2 are provided.

Thus, good quality anodes A are horizontally supported on the starting ends of walking conveyors WC2 and WC3. are transported by the operation of walking conveyors WC2 and MC3 shown in FIG. 4, and the edges are processed on the way. That is,
Walking conveyor wc2. wc3 is moved downstream, in other words, to the left in FIG. 4(A) by a stroke h, and each of the first good anodes AGI is moved to the left in FIG.
), the processing machine IVICI reaches the positioning position of MC2. Walking conveyor WC in that state
2, WC3 is lowered, and the good anode A is transferred from the walking conveyor WC2, WC3 to the anode receiver M,' of VIC+, IVIC2.
Processing machine 1Vfc is placed on H and remains horizontally supported.
+, it is positioned by a positioning device attached to MC2 and then clamped. Clamped good anode AG machine both ears E, lower part F of E, processing machine MC1, M
Cut or polished by C2 automatic rotary tool. Therefore, not only the inclination due to the shape of the mold of the lower part F of both ears E and E, but also the inclination due to overfilling and warping must be corrected so that they are perpendicular to the wide surface of the good anode AG□. At the same time, the lower F.

F stains, foreign matter, oxide layers, etc. can be completely removed.

While the non-defective anode AG□ is being corrected as described above, the walking conveyors WC2 and WC3 are
After being returned to the upstream side by a stroke h in the descending forest condition as shown in Fig. 4 (Q), that is, to the right side of the Fig. As shown in Figure 4 ■, the whistle is then moved downstream by stroke h again as shown in Figure 4 ■, and the walking conveyor wc
2. Each non-defective anode AG□ on we3 is processed by processing machine MC.
+, 'The second non-defective anode AG2 and the non-defective anode A are transported downstream from the positioning position of MC2. After 3, the positioning positions of machining +/AMc, MC2 are sequentially reached in the same manner.

Walking conveyor VVC with a series of shaping processes
2. Good anode A has reached the end of wc3. is the second
As shown in the figure, the good anodes AG are combined into one series and transported by the reversing device 111, and each non-defective anode AG is sequentially reversed from the horizontally supported state to the vertically supported state by the reversing device 11. E.

E is supported and carried out, and transported to the next stage electrolytic factory or shaped anode stockyard.

Although the above is an example of a complete flow according to the present invention, some of the steps described above may be omitted depending on the quality of the anode coming out of the casting process. Therefore, the present invention is not only applicable to ordinary flat pour anodes, but also
If necessary, it can also be applied to finish continuously cast anodes. Furthermore, it goes without saying that the transportation of the anode during the shaping process is not limited to the walking conveyor, and that various transportation devices can be used.

By the way, in the main part of the above-mentioned shaping system, a viscous adhesive in which the anode is handled in a horizontally supported state has the following advantages.

(1) The entire shaping system has been simplified because it is very easy to stably grasp and transport the anode, which is the object to be shaped, during processing.

(2) Transport and storage can be faster than handling the anode in a vertically suspended state, and positioning during each process can be done quickly and accurately.

(3) In the step of correcting the cross-sectional shape, the anode can be pressed up and down, so there is no mechanical strain, and there is no need to pay attention to maintaining the balance of the anode.

(4) It is easy to extract and eliminate defective anodes, and to transport anodes and branch and integrate processing lines, and therefore, the space required for the entire shaping system can be reduced.

The above-mentioned shaping system can shape one copper anode every 98 seconds. However, the number of branches of the good anode is two lines in this drawing example,
It goes without saying that if the number of systems is increased to two or more and a reprocessing step is provided for each system, the anodes can be processed in parallel and the amount of shaping processing can be increased.

As explained above, according to the present invention, at least the necessary shaping process and defective anode discharge process are provided between the receiving process for accepting unshaped anodes and the carrying-out process for carrying out the anodes after shaping. The shaping process consists of at least the step of holding the anode in a horizontally supported state and correcting its cross-sectional shape, and the step of cutting or polishing the lower part of the ear, so care must be taken to maintain the balance of the anode. It is possible to easily and reliably correct curvature, undulation, and twisting of the anode body and ears, or to make the cross section into a targeted and suitable shape, and to easily and reliably remove sloping, cutting, etc. at the lower part of the ears. As a result, the shape of the anode is corrected and the vertical suspension of the anode is improved, so that the number of short circuits of the anode during electrolysis can be significantly reduced.

Further, according to the present invention, since defective anodes are automatically removed and transported out from a separate system, the labor required for sorting out and extracting defective anodes can be significantly reduced.

Furthermore, in the present invention, by eliminating defective anodes before the reprocessing stage, which is the bottleneck in the overall flow performance, there is an effect that the performance of the entire shaping process can be improved.

Further, according to the present invention, the contact resistance between the lower ear and the conductor is reduced by cutting or polishing the lower ear of the anode,
In addition to reducing the number of anodes with poor contact, there is an effect that the total contact resistance can be reduced on average.

Furthermore, in the present invention, if the anode is transported in a horizontally supported state by a walking conveyor during the cross-sectional shape correction stage, single weight measurement stage, thickness measurement stage, and reprocessing stage, handling of the anode at each stage becomes easy and each Since positioning can be performed reliably in stages, there is an effect that the shaping ability can be further improved.

[Brief explanation of drawings]

FIG. 1 is a plan view for explaining the shape of the anode, FIG. 2 is an explanatory diagram showing an embodiment of the shaping system used in the method according to the present invention, and FIG. 3 is a walking diagram of the cross-sectional shape correction step. FIG. 4 is an explanatory diagram of the operation of the walking conveyor in the reprocessing stage. 1...Acceptance process, 3...Cross-sectional shape correction stage, 4.
...Single weight measurement step, 5...Thickness weight measurement step, 6.
- Step of removing defective anodes, 8... Step of discharging defective anodes, 9, 10... Step of processing ears, 12... Step of discharging anodes after shaping, WCI, WC2, WC
3. Walking conveyor. Patent applicant Nippon Mining Co., Ltd. Nikko Engineering Co., Ltd.

Claims (3)

[Claims] (1) Anode shaping in which at least the necessary shaping process and defective anode discharge process are performed between the receiving process for carrying in the electrolytic metal anode and the carrying out process for carrying out the anode after shaping. In the method,
An anode shaping method characterized in that the shaping step comprises at least the steps of correcting the cross-sectional shape of the anode while holding the anode in a horizontally supported state, and cutting or polishing the lower part of the ear of the anode. (2) The shaping process includes straightening the cross-sectional shape using a press to correct bending, warping, and twisting of the anode, or further adjusting the cross-sectional shape.Step 1: Single weight measurement step of measuring the weight of each anode, and measuring the thickness of the anode. Thickness measurement step, removal step of removing defective anodes that have failed in weight in the single weight measurement step or failed in thickness in the thickness measurement step.The lower part of the ear of the anode is cut or The anode shaping method according to claim 1, comprising a reprocessing step of polishing, and the defective anode removed in the defective anode removing step is discharged from the defective anode discharging step separately from the finished anode. . (3) According to claim 2, the anode is transported in the MR surface shape correction stage, the single weight measurement stage, the thickness measurement stage, and the edge processing stage 1vK in a horizontally supported state by a walking conveyor. Anode Minegata method.