JPH0768628B2 - Electrode plate treatment method in electrolytic smelting - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electrode plate treatment method in electrolytic smelting in which both positive and negative electrode plates are pulled out of an electrolytic cell at the same time to perform various electrode plate treatments.

[Prior Art and Problems] In zinc electrolysis, which is a typical example of electrolytic smelting, the Yin-Yo bipolar plates charged in the electrolytic cell are conventionally separated from each other as shown in the following processing example. Has been done.

Example of cathode plate treatment process (a) Lifting the cathode plate from the electrolytic cell → (b) Cleaning the cathode plate → (c) Removing the electrodeposited metal → (d) Inserting the cathode plate into the electrolytic cell → (e) Continuation of electrolysis Example of anode plate treatment process (a) Stop energization of electrolytic cell → (b) Take out cathode plate →
(C) Extraction of electrolyte solution → (d) Removal of anode plate → (e)
If necessary, clean the electrolytic cell → (f) remove the crust from the anode plate → (g) clean the anode plate, press, etc. → (h) load the positive and negative electrode plates into the electrolytic cell → (i) supply the electrolytic solution → (j) Resuming electrolysis As described above, conventionally, the cathode plate is pulled up from the electrolytic bath every time the electrodeposited metal is peeled off, various electrode plate treatments are carried out before and after the peeling, and then the electrolytic plate is charged again. However, after the electrolysis cycle is repeated several times, the anode plate is pulled out of the electrolytic cell and various maintenance work such as removal of crust adhering to the surface of the electrode plate is performed. Conventionally, the reason why the positive and negative electrode plates are separated and treated is that the electrodeposited metal deposited on the cathode plate is peeled off every 1 to 4 days, but the crust removal on the anode plate is
It is believed that it is sufficient to do it every 20 to 40 days. If the maintenance cycle of the anode plate is shortened to remove the crust, the number of operations increases, which causes a burden. Especially,
Since each of the Yin-Yo bipolar plates is suspended in the electrolytic cell one by one, it is troublesome to pull up each of the bipolar plates and treat the bipolar plates at the same time, resulting in a heavy work load. Therefore, in order to balance the work load of crust removal and the power consumption reduction effect of crust removal, the crust removal work of the anode plate is conventionally performed in a cycle of 20 to 40 days. However, the crust of the anode plate becomes an electrolytic resistance, and the thicker the crust, the lower the electrolytic efficiency. Therefore, from the viewpoint of increasing the electrolytic efficiency, it is desirable to remove the crust as early as possible. Further, the smaller the amount of crust adhered, the easier the maintenance work of the anode plate is. Therefore, in this respect as well, it is desirable that the maintenance cycle of the anode plate is short.

Further, conventionally, the maintenance of the anode plate is performed by stopping the energization in order to take out all the positive and negative electrode plates of a specific electrolytic cell, and there is a problem that the electrolysis in this electrolytic cell is interrupted during the electrode plate processing operation.

[Means for Solving Problems] The present invention uses a hoisting and transferring means such as a crane to simultaneously hoist the positive and negative electrode plates, and continuously carries out a series of electrode plate treatments while holding the both electrode plates on the hoisting and transferring means. Anode plate maintenance work is carried out in association with the work of stripping the electrodeposited metal on the plate, and the crust of the anode plate is removed without significantly increasing the burden of the maintenance work, thereby solving the conventional problems and improving the electrolysis efficiency. To improve.

[Structure of the Invention] According to the present invention, there is provided an electrode plate processing method having the following structure.

(1) (a) A plurality of positive electrode plates and negative electrode plates are alternately and integrally connected to each other through an insulating mold to form an electrode plate unit, and the electrode plate units are loaded into an electrolytic cell. (B) Having a large number of slidable anode hangers and cathode hangers, the anode hangers and cathode hangers are insulated from each other, and each hanger is equipped with a hook for hanging the electrode plate. Using a transfer crane that conveys the electrode plate suspended in the hanger, (c) each anode plate and each cathode plate of the electrode plate unit are hung on each hanger of the transfer crane to electrolyze the electrode plate unit. (D) By moving the hanger, the electrode plates are hung from each other to be separated from each other to widen the electrode plate spacing, and (e) The electrode plate is hung with the electrode plate spacing widened to suspend the electrodeposited metal. Electrode plate treatment including peeling, electrode plate cleaning and electrode plate polishing (F) After the electrode plate treatment, the hangers suspending the electrode plates are brought close to each other to narrow the gap between the anode plate and the cathode plate that are alternately arranged, and they are integrated at a constant interval through the formwork. A method of processing an electrode plate in electrolytic smelting, which comprises forming an electrode plate unit again and sending it to an electrolytic process.

(2) The electrode plate treatment method according to the above (1), in which a plurality of anode plates and cathode plates are simultaneously hung on a hanger, and the electrode plate unit is pulled up from the energized electrolytic bath and conveyed to the electrode plate treatment step.

(3) The electrode plate processing method according to (1), in which a large number of electrode plates are simultaneously suspended while being passed between the electrode plate processing means while the electrode plates are suspended on a hanger.

An example of the electrode plate processing step according to the present invention is shown in FIG. Second
The figure shows an example of the layout of each processing step.

As shown in the figure, in the method of the present invention, the anode plate and the cathode plate are simultaneously pulled up from the electrolytic cell. A crane or the like can be used as a means for lifting and transferring the Yin Yang bipolar plates. By using an electrically insulated crane, the cathode plate and the anode plate can be lifted at the same time from the energized electrolytic cell. The yin and yang bipolar plates are usually held at an interval of about 30 to 35 mm in the electrolytic cell, and they are arranged close to each other by about 15 mm by using a certain form. The distance between the plates is too narrow to perform various plate processing operations by simultaneously suspending the positive and negative plates from the coolen. Therefore, it is desired that the crane has a function of expanding and contracting the interval between the suspended electrode plates. The crane shown in FIG. 3 may be used as such a crane.

As shown in the figure, the crane 10 includes a main body frame 11 arranged so as to be freely movable along the electrolytic cell; a traveling mechanism 12 for the main body frame; and a movable body which is mounted on the main body frame and is located above the electrolytic cell. Hanger support 13; a plurality of movable hangers 14 mounted on the hanger support; a hanger moving mechanism 15 for moving the hangers to move them away from each other; an ear of an electrode plate suspended from the hangers It has a tiltable hook 16 that engages with the portion; and a hook tilting mechanism that tilts the hook to engage with and disengage from the electrode plate ear. An insulating material is provided between the hanger and the hanger support. Further, there is provided means for moving a plurality of hangers mounted on the support base to expand or reduce the interval between the hangers. That is, the hangers are connected to each other via connecting links, while the hanger support is provided with two chains that move the hangers in opposite directions. The hangers are moved by the interposition to move toward or away from each other, and the mutual distance is adjusted.

Further, the crane is provided with two types of hangers so that the polar plates having a small mutual interval can be simultaneously hung. That is, it has a cathode hanger for suspending the cathode plate and an anode hanger for suspending the anode plate, and the anode hanger and the cathode hanger are insulated from each other by the insulating material. Further, the cathode hanger is formed with legs at both ends thereof, and is mounted on the guide rails on the hanger support through the legs so that the anode hanger can be inserted between the legs of the cathode hanger. The legs of the cathode hanger are formed higher than the legs of the anode hanger.

The anode plate (anode plate) 1 and the electrodeposited cathode plate (cathode plate) 2 pulled up from the electrolytic cell by the crane 10 are transferred to the anode plate servicing step 30 by the crane 10 while expanding the electrode plate spacing. As an example, the electrode plate spacing in the electrolytic cell is 15 ~
What is 30mm is spread during the transfer at intervals of 150-250mm.

The anode plate transferred to the anode maintenance process 30 has the anode crust on the surface of the anode plate removed while passing through the process. Anode maintenance machine provided in the anode maintenance process 30
An example of 31 is shown in FIG. 4 and FIG. The illustrated anode maintenance machine 31 is configured so as to pass between a plurality of pipes 32 in which a plurality of electrode plates 1 and 2 suspended from a crane 10 are erected and to prevent the horizontal movement of the crane 10 from being hindered. There is. Each pipe 32
A large number of nozzles 33 that open toward the surface of the anode plate 1 are provided on the side surface of the. When a plurality of electrode plates 1 and 2 come in parallel between the pipes 32 in a state of being suspended by the crane 10, this entry is detected by a position sensor or the like,
High-pressure water is sprayed from both sides of the anode plate 1 through the nozzles 33 toward the surface of the anode plate. Anode plate 1 is pipe 32
High-pressure water is continued to be jetted while passing through, and the water pressure removes the anode crust adhering to the surface of the anode plate. At the same time, the mold 70 attached to the end on the anode plate side is washed. When the anode plate 1 passes through the pipe 32, this passage is detected by a position sensor or the like, and the injection of high-pressure water is stopped. As described above, in the anode maintenance machine 31, while the anode plate 1 and the cathode plate 2 are suspended from the crane 10, the plurality of anode plates are transferred while being transferred toward the next cathode cleaning step 40. 1s are processed at the same time. The anode maintenance machine is not limited to the above model and can be used. If the mold 70 is attached to the anode plate 2,
Since the anode plate 2 is unlikely to bend, it is possible to omit the conventional work for bending the plate surface.

Next, the surface of the electrode plate transferred to the cathode plate cleaning step 40 is cleaned while passing through the step. The cathode cleaning machine having the same structure as the anode maintenance machine 31 can be used. In the cathode plate cleaning step 40, warm water is used for good cleaning effect.

The anode plate maintenance and the cathode plate cleaning may be performed at the same time. By providing the nozzles facing the surface of the anode plate and the surface of the cathode plate in the pipe 32 of the anode maintenance machine 31, the maintenance of the anode plate and the cleaning of the cathode plate are simultaneously performed.

While the anode maintenance machine 31 and the cathode cleaning machine shown in FIGS. 4 and 5 are used, a plurality of anode plates and cathode plates are hung by the crane 10 and horizontally transferred toward the peeling process 60. First, the anode plate is serviced and the cathode is cleaned.

In the peeling step 60, the electrode plates are set in the cathode peeling machine while holding the electrodeposited cathode plate 2 and the anode plate 1 with the distance between the electrodes being expanded. As shown in FIG. 2, the stripping machine is of a type capable of stripping a plurality of electrodeposited cathode plates at once. The anode plate 1 and the electrodeposited cathode plate 2 are simultaneously set in the peeling machine 61. The gap between the electrodeposited cathode plates expanded by the crane 10 is the peeling machine 61.
The gap between the stripping knives 62a and 62b provided in the above is set to be the same, and the electrodeposited zinc is stripped while the electrode plates 1 and 2 are held in the crane 10.

In this way, the stripping operation is performed without removing both plates from the hanger, but if the distance between the electrodeposited cathode plate and the adjacent anode plate is maintained at 150 to 250 m / m, the anode plate will be present in the stripper. Even with a normal peeling machine, however, the peeling operation will not be hindered.

After the electrodeposited zinc is separated from the cathode plate 2, the electrode plates 1 and 2 are transferred to the cathode polishing process 50. Polishing of the cathode plate after stripping the electrodeposited zinc is also carried out while the crane 10 holds the anode plate 1 and the cathode plate 2. Even in this process, the distance between the cathode plate and the adjacent anode plate is 150 to 250.
If it is m / m, it does not hinder the polishing of the cathode plate.

An example of the cathode polishing machine 51 is shown in FIGS. 6 and 7. The polishing machine 51 passes between a plurality of polishing brushes on which a plurality of electrode plates 1 and 2 suspended from a crane 10 are erected. At this time, the cathode plate 2 is pressed against a pair of polishing brushes 52a and 52b. Are configured to pass through. The polishing brushes 52a and 52b are horizontally rotated to rotationally polish the surface of the electrode plate while the cathode plate 2 passes. The rotation direction and rotation speed of the polishing brushes 52a and 52b are appropriately adjusted according to the transfer direction and speed of the crane 10. If the mold 70 is provided at the side end of the anode plate 2 and is closely attached to the cathode plate 2 and disposed in the electrolytic cell, it is not necessary to attach an insulating material to the side end of the cathode plate 2 as in the conventional case. Since the gap between the polishing brushes 52a and 52b can be fixed, the mechanism of the polishing machine can be simplified.

The plates 1 and 2 that have passed through the cathode polishing machine 51 are the crane 1
While 0 moves toward the electrolytic cell, the anode hanger and the cathode hanger that suspend the electrode plate are moved so as to approach each other, the electrode plate gap is reduced, and the anode plate and the cathode plate are intervened with the formwork interposed. The plates and the plates are alternately arranged in close contact with each other. The array of electrode plates integrated in this way is lowered into the electrolytic cell, and the electrode plates are reloaded at the location where they are taken out.

In the treatment method of the present invention, the number of electrodes to be handled in one treatment step is arbitrary, but from the viewpoint of improving work efficiency, as one example, one electrolytic cell is equivalent to 1/2 electrode plate. And the above process is repeated for two cycles to complete the electrode plate treatment for one tank. It should be noted that the electrolytic cell can be cleaned by utilizing the space created in the electrolytic cell while the electrode plate for 1/2 cell is pulled down and then charged again. At this time, if fallen items of the anode crust are accumulated on the bottom of the electrolytic cell, the bottom of the electrolytic cell should be cleaned without stopping energization to the electrolytic cell by using a means for sucking the crust on the bottom of the electrolytic cell. You can

A series of processing operations in the processing method of the present invention may be automatically performed by an automatic control mechanism incorporated in each of the processing device and the crane arranged in each step. As the automatic control mechanism, a normal one having a position sensor, a control circuit unit, etc. can be used.

Further, in the above-described processing step, the electrode plate cleaning step and the crust removing step may not be performed each time, but may be performed once when the processing step is performed several times.

Further, in the above-mentioned processing step, the electrode plate and the mold damaged during the peeling process to the electrode plate polishing process are detected and replaced with another electrode plate and the frame.

The processing method shown in FIG. 1 has been described above with reference to the layout diagram of FIG. 2. However, the processing method of the present invention is not limited to the method of passing through the above steps, and is based on the layout example of FIG. Not limited to Further, the electrode plate cleaning device and the maintenance device are not limited to the devices having the illustrated configurations.

[Effects of the Invention] In the treatment method of the present invention, the anode plate and the electrodeposited cathode plate are mechanically pulled simultaneously from the electrolyzer in the energized state, which is different from the conventional method of pulling these electrode plates separately. However, the work amount does not increase, and rather, the process of each step is continuously performed in a state where these electrode plates are suspended in a crane, so that a series of work can be performed more quickly than in the conventional method.

By using the illustrated type of anode maintenance machine and cathode cleaning machine, these treatments can be performed during horizontal movement of the crane, which further shortens the treatment time.

In the conventional method, a stock conveyor is required to carry out various processing operations such as maintenance of the anode plate, peeling of electrodeposited zinc from the electrodeposited cathode plate, and polishing of the cathode plate. To install a stock conveyor, a large building area is required in the electrolytic plant. In the present invention, it is not necessary to use a stock conveyor at all, and a series of treatments of the electrode plate can be effectively performed with a relatively small building area.

In addition, since a large number of plates can be processed at one time while being held in the crane, the processing capacity is large, and there is no need to transfer the plates from the crane holding the plates to each process, and the stock conveyor to the anode It is possible to simplify the treatment process because transfer equipment such as a leveling machine, a peeling machine, and a polishing machine, transfer equipment from these devices to a stock conveyor, and transfer equipment from a stock conveyor to a crane are all unnecessary.

The treatment method of the present invention can be carried out on a plate having a narrow electrode plate spacing in an electrolytic cell by enlarging or reducing the gap between the electrode plates during transfer of the electrode plate. ,
Alternatively, the treatment method of the present invention can be appropriately applied to the electrode plate of the electrolytic cell in which the electrode plate space is further narrowed by using the electrode plate frame. Therefore, a series of treatments can be effectively carried out even on an electrode plate array in which a plurality of electrode plates are integrated with a frame interposed between the electrode plates. For example, a mold surrounding the outer periphery of the anode plate is attached, the anode plate and the cathode plate are arranged in close contact with each other by interposing this mold, and the one integrated in a cassette shape is There is an advantage that the electrode plate interval is small and the electrolytic cell can be downsized. Further, there are advantages that it is easy to load a large number of electrode plates into the electrolytic cell. Since the method of the present invention simultaneously lifts both the positive and negative electrode plates, if the treatment method of the present invention is carried out on such an integral type electrode plate, it is not necessary to remove the electrode plates individually, and the electrode plate processing is extremely efficient. Can be done on a regular basis.

[Brief description of drawings]

FIG. 1 is a flow sheet showing an example of the processing method of the present invention,
FIG. 2 is a layout of each processing step, FIG. 3 is a schematic view showing an example of a crane used in the present invention, FIGS. 4 and 5 are schematic views of an anode maintenance machine, and FIGS. 6 and 7 are It is a schematic diagram of a cathode polisher. In the drawing, 10 …… Crane, 20a ～ 20b …… Electrolyzer, 30 ……
Anode maintenance process, 40 …… Cathode plate cleaning process, 50 ……
Cathode polishing process, 60 ... Electrodeposition zinc stripping process

Front Page Continuation (72) Inventor Mitsuru Oda 3-1-18 Ibaraki, Akita City, Akita Mitsubishi Metals Co., Ltd. Akita Smelter (56) References JP-B 57-53437 (JP, B2) JP-B Sho 57-53438 (JP, B2) JP-B-56-4152 (JP, B2)

Claims (3)

[Claims] (A) A plurality of anode plates and a plurality of cathode plates are alternately and integrally connected to each other at regular intervals via an insulative mold to form an electrode plate unit, and the electrode plate units are mounted in an electrolytic cell. (B) Having a large number of slidable anode hangers and cathode hangers after being put in and electrolyzing, these anode hangers and cathode hangers are insulated from each other, and each hanger has a hook for hanging the electrode plate. (3) Using a transfer crane that is installed and conveys the electrode plates suspended in the hanger, (c) suspending each anode plate and each cathode plate of the electrode plate unit on each hanger of the transfer crane. From the electrolyzer, (d)
By moving the hanger, the electrode plates are pulled apart from each other to widen the electrode plate spacing, and (e) the electrode plate separation, electrode plate cleaning and After the electrode plate treatment including polishing of the plate surface, (f) after the electrode plate treatment,
The hangers that suspend the electrode plates are brought close to each other to narrow the gap between the anode plates and the cathode plates, which are alternately arranged, and they are integrated at a constant interval via a formwork to form the electrode plate unit again to perform an electrolysis process. A method for treating an electrode plate in electrolytic smelting, which comprises: 2. The electrode plate treatment method according to claim 1, wherein a plurality of anode plates and cathode plates are simultaneously hung on a hanger, and the electrode plate unit is pulled up from the electrolyzing cell being energized and conveyed to the electrode plate treatment step. . 3. The electrode according to claim 1, wherein the processing of a large number of suspended electrode plates is carried out at the same time while a large number of electrode plates are suspended from a hanger while passing between the electrode plate processing means. Plate processing method.