JPH0713315B2 - Electrode plate formwork - Google Patents

Description

TECHNICAL FIELD The present invention relates to a mold for aligning and holding electrode plates in an electrolytic cell. More specifically, in a preferred embodiment of the present invention, the present invention relates to an electrode plate form that integrally holds a plurality of anodes and cathodes at regular intervals.

[Technical background] In electrolytic smelting and refining, a large number of electrodes (anode, cathode) are alternately arranged at regular intervals in an electrolytic cell. The smaller the distance between these electrode plates, the less the resistance of the electrolytic solution and the lower the battery voltage. However, conventionally, each electrode plate is a single piece, and since each electrode plate is installed in a state of being hung from the upper end of the electrolytic cell by the ears at the upper end of the electrode plate or the crossbar, it swings. It is easy for them to come into contact with each other to cause a short circuit. For this reason, the gap between the anode plates is usually set to about 70 to 80 mm, and the gap between the anode plate surface and the cathode plate surface is set to about 30 to 35 mm, which limits the efficiency of electrolysis. Therefore, various attempts have heretofore been made so as not to cause a short circuit even if the distance between the electrode plates is set relatively small.For example, an insulating cross bar is installed at the bottom of the electrolytic cell, and the lower end of each electrode plate is A method is known in which the electrode plate is prevented from shaking and contacting by inserting it into a cross bar and fixing it. However, in this method, it is difficult to insert the lower end portion of the electrode plate into the cross bar, and the effect of preventing short circuit is insufficient. In addition to this, several insulating protrusions are provided on the surface of the anode plate,
Although a method is known in which the cathode plate does not come into contact with the anode plate itself even if it comes into contact with the projections, it takes time and effort to form the anode plate, and the short-circuit preventing effect is insufficient.

Further, in the conventional electrolysis process, the anode plate and the cathode plate are put in and taken out separately, so that there is a problem that the loading work is troublesome. For example, when the electrodeposited metal on the surface of the cathode plate is stripped, the cathode plate is hung up and sent to the stripping process while the anode plate is installed in the electrolytic bath, and after stripping, the cathode plate is returned to the electrolytic bath again. At this time, a plurality of cathodes are hung in order to improve work efficiency, but when returning these cathode plates to the electrolytic cell,
In order to prevent the cathode plate from coming into contact with the anode plate already arranged in the cell, the worker monitors the suspended cathode plate each time and adjusts the intervals to load the electrolytic cell into the electrolytic cell.
Therefore, the work time is prolonged and manpower is required.

In addition, when peeling the electrodeposited metal from the cathode plate, various contrivances have been made so far so that a peeling knife can be easily inserted between the electrodeposited metal and the cathode plate. For example, cover both ends of the cathode plate with rubber or plastic insulating material,
It is known to form a step between the electrodeposited metal and the surface of the cathode plate. However, in this method, it is necessary to remove the insulating material from both side ends of the cathode plate each time the peeling work is performed, and then reattach the insulating material to the both side ends after the peeling work, which is extremely complicated. Therefore, instead of such a method, there has been attempted a method in which the above-mentioned insulating member is attached to the inside of the electrolytic cell so that the electrode plate is inserted into the electrolytic cell and at the same time, the insulating member is attached to both ends thereof. However, this method is not preferable because it requires a great improvement in the electrolytic cell and hinders the reflux of the electrolytic solution.

[Means for Solving Problems] In the present invention, by using a frame surrounding the periphery of the electrode plate, the electrode plates can be placed closer to each other than in the conventional case, and the electrolysis efficiency is improved.

In addition, a large number of anode plates and cathode plates can be held integrally, and the work efficiency of replacing the cathode plates is greatly improved.

Conventionally, each of the anode plate and the cathode plate is suspended in the electrolytic cell, and it is not known to combine and hold them together. The reason for this is that both electrodes are used for different purposes, and the cathode also serves as a mother plate for depositing and collecting electrolytic metal, but the anode is merely used as an electrode and the electrodeposited metal is used. This is because it is sufficient to take out only the cathode plate in order to recover.

Contrary to the above-mentioned conventional wisdom, the present invention enables the electrode plates to be installed close to each other by using the formwork,
Moreover, a plurality of anode plates and cathode plates are integrally held so that charging into the electrolytic cell can be carried out mechanically, and work efficiency is greatly improved.

Further, by forming the upper inner end of the insulating form frame so as to project slightly inward, a clear step is formed between the side end of the electrodeposited metal and the surface of the cathode plate, and the electrodeposited metal can be easily peeled off. did.

[Configuration of the Invention] According to the present invention, an insulative formwork mounted on an electrode plate in an electrolysis cell, the frame body surrounding an end on the electrode plate side, and the frame body mounted on the electrode plate. There is provided an electrode plate form having a fixing part, an engaging part that engages with another adjacent electrode form, and a short-circuit prevention part that prevents mutual contact of the electrode plates.

As a preferred embodiment thereof, (a) the frame body is formed in a rectangular shape so as to surround the outer peripheral side end of the anode plate, and the fixing portion has a claw-shaped projection having a groove into which the anode plate side end is inserted. A plurality of the claw-shaped projections are provided on the inner periphery of the frame body, and the engagement portions are a pair of projection pieces provided at opposite outer ends of the frame body. An electrode plate frame in which another adjacent frame body is engaged between the projecting pieces, and the anode plate and the cathode plate are alternately arranged through the frame body, and (b) the upper frame portion of the frame body is electrolytic. An electrode plate frame provided at a position in contact with the liquid surface, in which a gap for circulating the electrolytic solution is formed between the lower end portion and both lower end portions of the frame body and the electrode plate, and (c) mist removal on the upper frame portion. An electrode plate frame provided with a slit for each is provided.

Hereinafter, the electrode plate form of the present invention will be described with reference to an embodiment shown in the drawings.

As shown in the figure, the mold 1 of the present invention is formed of an insulating material such as hard synthetic resin, and is a frame body surrounding the end on the anode plate side.
10 and a fixing part for mounting the frame body 10 on the anode plate 2.
20, a short-circuit prevention part 30 for preventing mutual contact of the electrode plates, and an engaging part 40 for engaging with another adjacent electrode plate form 3.

The frame 10 has a rectangular shape as shown in FIG.
A pair of frame members 11 having the same shape, so as to be attached to both surfaces of
Formed by twelve. Frame member as shown in FIG.
The lateral widths of 11 and 12 are slightly smaller than the side edges of the anode plate 2 (about 1 to
It is preferable that the anode plate 2 is formed to be slightly larger than the width of the anode plate 2 so as to maintain the gap 50, and the electrolytic solution flows through the gap 50.

As shown in FIG. 3, the fixing portion 20 has a claw-shaped protrusion 21a,
21b, the protrusions 21a, 21b have a spring force, and the protrusions 21a, 21b are formed with a groove 22. The side end of the anode plate 2 is inserted into the groove 22 and Fix by force. It should be noted that the depth of the groove 22 is set so that the bottom of the groove 22 is slightly smaller than the inner peripheral edge of the frame members 11 and 12 so that the gap 50 is formed between the frame members 11 and 12 and both side ends and the lower end of the anode plate. It may be formed so as to be located inside.

The upper frame portions 11a and 12a of the frame members 11 and 12 are in contact with the electrolytic solution surface g and are located slightly below the liquid surface, and the upper end surface is about 2 to 5c from the liquid surface g.
It is installed at a height of m. Further, the frame members 11 and 12 are provided on the side surfaces of the upper frame portions 11a and 12a, respectively.
Bolt holes 13 and 14 are provided for fixing to.
The bolts may be fixed by welding instead of tightening. Further, the upper frame portion 11a, 12a is formed in a cylindrical shape, the slit 15 for removing the mist diverging from the electrolyte surface,
A plurality of holes are drilled. As shown in FIG. 9, the slit 15 is formed so as to penetrate through the upper frame portions 11a and 12a, and has a filter 16 inside thereof. Bubbles such as oxygen gas generated in the electrolytic solution diverge from the surface of the electrolytic solution and flow out through the slit 15. The electrolytic solution mist entrained in the gas is collected and removed by the filter 16 when the gas passes through the slit 15.

The short-circuit prevention part 3 is a plate-shaped member in the illustrated example, and is provided at both upper ends of the upper frame parts 11a and 12a so as to project.
The shape of the short-circuit prevention portion 30 is not limited to that shown in the figure, and for example, the upper frame members 11 and 12 are formed in an inverted U-shape, and the frame members 11 and 12 are hung from the crossbar 2a. Good.

The engaging portion 40 is formed by a pair of plate-shaped projecting pieces 41, 42 provided along the both ends of the frame member 11 and facing each other. The projecting pieces 41 and 42 project forward toward the other mold 3 so that another mold adjacent thereto is engaged. The engaging portion 40 plays a role of aligning the positions of adjacent molds via the cathode plate 4 and covering a side end of the cathode plate 4 interposed between the molds 1 and 3. If the engaging portion 40 is not provided,
Since metal is deposited on the side edge of the cathode plate 4 and the electrodeposited metal becomes bag-shaped, there arises a problem that the peeling work becomes difficult in the subsequent process.
As shown in FIG. 3, the mold 1 is attached to the anode plate 2 and is engaged with another mold 3 with the cathode plate 4 interposed therebetween. The back of the mold is then inserted between the projecting pieces 41, 42 of the mold 1,
The molds 1 and 4 are integrally held. Similarly, a plurality of molds are sequentially combined integrally, whereby a plurality of anode plates 2 and cathode plates 4 are alternately arranged.

As shown in FIG. 4, the horizontal widths of the frame members 11 and 12 are substantially the same as the horizontal width of the cathode plate 4, and when the molds 1 and 4 are engaged with each other with the cathode plate 4 interposed therebetween, 4 is a frame member 11,
The outer peripheral edge of the cathode plate 4 is covered with 12, and the electrodeposition area width m of the cathode plate 4 matches the inner peripheral width 1 of the frame members 11 and 12. Further, as described above, since the lateral width n of the anode plate 2 is formed to be slightly smaller than the lateral width of the frame members 11 and 12a, the electrodeposition area width m of the cathode plate 4 is slightly larger than the lateral width n of the anode plate 2. As shown in FIG. 6, the electrodeposition area width m of the cathode plate 4 is temporarily assumed.
Is smaller than the lateral width n of the anode plate and the inner peripheral ends of the frame members 11 and 12 are located inside the side ends of the anode plate 2, the current density at the inner peripheral end of the frame member increases during electrolysis, and the electrodeposited metal 51 is formed. The ridges are deposited on both side edges of the frame member, and this may contact the anode plate to cause a short circuit. On the other hand, as shown in FIG. 7, when the width m of the electrodeposition area exceeds the lateral width n of the anode plate, the end portion of the electrodeposited metal 51 becomes tapered, and the peeling knife cannot be inserted into this portion. It will be difficult.

In the mold of the present invention, the width m of the electrodeposition area is set to be slightly larger than the lateral width n of the anode plate, so that the problems shown in FIGS. 6 to 7 do not occur.

[Advantages of the Invention] (a) Since the side plate edge of the electrode plate form of the present invention surrounds the outer periphery of the anode plate, when the cathode plate is arranged, the distance between these electrode plates is Since the frame is fixed to the thickness of the frame, it is possible to reliably prevent a short circuit due to the inclination or swing of the electrode plate. Therefore, the distance between the anode plate and the cathode plate can be greatly reduced compared to the conventional case, and the battery voltage can be remarkably reduced.

Incidentally, as described above, the surface distance between the anode plate and the cathode plate has conventionally been about 30 to 35 mm, but when the mold of the present invention is used, the above distance should be close to about 14 mm. You can

(B) By using the electrode plate form of the present invention, the anode plates and the cathode plates can be integrally held in a state of being alternately arranged. Therefore, when loading these electrode plates into the electrolytic cell, it is not necessary to adjust the distance between the electrode plates each time, and the loading work can be performed automatically, and the working efficiency can be significantly improved.

(C) In the mold of the present invention, a gap is maintained between the side end and the lower end of the anode plate, and the electrolytic solution flows through the gap, so that the reflux of the electrolytic solution inside the electrolytic cell is not hindered. Further, since the upper frame portion of the mold is provided at a position in contact with the electrolytic solution surface, it is possible to prevent erosion of the electrode plate near the electrolytic solution surface. Conventionally, the erosion of the surface of the electrode plate is remarkable at about 2 to 5 cm above the surface of the electrolytic solution, and the life of the electrode plate is shortened. However, the mold of the present invention can solve such a problem.

Further, the upper frame portion of the mold makes the electrodeposition surface always constant without being affected by the vertical movement of the electrolytic solution surface, thus ensuring the insertion of the peeling knife.

(D) By providing a slit in the upper frame portion of the mold and providing a filter inside the slit, it is possible to collect the electrolytic solution mist emitted from the surface of the electrolytic solution and prevent the diffusion of the mist to the outside. Conventionally, a large amount of sulfuric acid mist was generated from the electrolytic solution in zinc electrolysis, but the above-mentioned problems can be solved by the mold of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial schematic perspective view of an electrode plate mold of the present invention, FIG. 2 is a front view of the mold attached to an electrode plate, and FIGS. 3 and 4 are 2 shows a state in which a plurality of anode plates and cathode plates are arranged by the frame, and FIG. 5 is a sectional view taken along the line AA, BB in FIG. 5, and FIG. 5 is a sectional view taken along the line XX in FIG. 7th
FIG. 8 is an explanatory view showing a deposited state of electrodeposited metal, FIG. 8 is a partial perspective view of an upper frame portion of a frame body, and FIG. 9 is a longitudinal sectional view of a slit portion of the upper frame portion. In the drawing, 10 ... frame body, 11,12 ... frame member, 20 ... fixing part, 21a, 21b ... projection part, 22 ... groove, 30 ... short-circuit preventing part, 40 ... engaging part, 41 …… Protrusion.

Claims (4)

[Claims] 1. An insulating mold mounted on an electrode plate in an electrolytic cell, comprising a frame surrounding an end of the electrode plate, and a fixing portion for mounting the frame on the electrode plate. An electrode plate form having an engaging part that engages with another electrode form and a short-circuit preventing part that prevents mutual contact of the electrode plates. 2. The frame body is formed in a rectangular shape so as to surround an outer peripheral side end of the anode plate, and the fixing portion is a claw-shaped projection having a groove into which the anode plate side end is inserted. A plurality of the claw-shaped projections are projected on the inner circumference of the body, and the engaging portions are a pair of projections provided at both outer ends of the frame body so as to face each other. The electrode plate form according to claim 1, wherein the anode plate and the cathode plate are alternately arranged via the frame body by being engaged with each other between the projecting pieces. 3. A patent in which an upper frame portion of a frame body is provided at a position in contact with an electrolytic solution surface, and a gap for refluxing the electrolytic solution is formed between a lower end portion and both lower end portions of the frame body and an electrode plate. An electrode plate form according to claim 1. 4. The pole plate form according to claim 1, wherein a mist removing slit is formed in the upper frame part.