JP5522151B2 - Weir for electrolytic cell - Google Patents

Description

  The present invention relates to a weir for an electrolytic cell. More specifically, the present invention relates to an electrolytic cell weir for adjusting the liquid level of the electrolytic solution in the electrolytic cell.

  For example, in the electrolytic refining of copper, a crude copper anode and a pure copper cathode are inserted into an electrolytic bath filled with an electrolytic solution, and electricity is applied between the anode and the cathode to deposit copper on the cathode. In order to obtain uniform and high-quality electrodeposition, the electrolyte is circulated in the electrolyte circulation system, and the electrolyte discharged from the electrolytic cell is freed of impurities in the liquid purification process and supplied to the electrolytic cell again. The

Here, if the electrolysis is continued in a state where the liquid level of the electrolytic solution in the electrolytic cell is maintained at the same level, the electrolytic copper becomes thicker than other parts in the vicinity of the liquid surface of the electrolytic solution. However, when it concentrates and precipitates near the liquid surface and adheres to the electrolytic copper as a crystal, the appearance quality of the obtained electrolytic copper deteriorates.
Therefore, conventionally, the liquid surface height of the electrolytic solution is periodically moved up and down to prevent excessive electrodeposition and crystal sticking and to improve the appearance quality of the obtained electrolytic copper (for example, Patent Document 1).

As a device for adjusting the liquid level of the electrolytic solution, a weir as shown in FIGS. 7 and 8 is known.
As shown in FIGS. 7 and 8, the electrolytic solution discharge portion of the electrolytic cell E has a recess formed in the upper edge of the side wall, and the drainage box B is fitted in the recess. The drainage box B is open without any wall on the inner side (right side in FIG. 7) of the electrolytic cell E, and is provided so as to protrude outside the electrolytic cell E (left side in FIG. 7). The drainage box B is provided with a weir 101 near the inside of the electrolytic cell E, and the inside of the electrolytic cell E and the drainage box B are partitioned by the weir 101. A drainage pipe P is connected to the bottom of the drainage box B outside the electrolytic cell E.

  The weir 101 includes a weir plate 110 and a weir plate receiver 120. The dam plate 110 is a plate-like member, and an opening 111 having a V-shaped lower edge is formed near the center thereof. Further, the barrier plate receiver 120 is a box-shaped member into which the barrier plate 110 is inserted from above, and an opening portion 123 is formed on the side wall on the electrolytic cell E side and the drainage box B side near the center. Yes. Note that the lower portion of the opening 123 is closed.

  As shown in FIG. 9A, the electrolytic solution in the electrolytic cell E flows out into the drainage box B through the opening 111 of the dam plate 110 and the opening 123 of the dam plate receiver 120, and the drainage pipe P Discharged from. Therefore, the liquid level of the electrolytic solution in the electrolytic cell E is determined by the height position of the opening 111 of the barrier plate 110. Therefore, as shown in FIG. 9B, the height of the electrolyte solution is increased by raising the barrier plate 110 upward with respect to the barrier plate receiver 120 and increasing the height position of the opening 111. can do. Thus, by adjusting the height position of the barrier plate 110 stepwise, the liquid level height of the electrolytic solution can be adjusted.

However, when the dam plate 101 is used for a long period of time, solid substances such as suspended matters and precipitates in the electrolytic solution accumulate on the bottom of the dam plate receiver 120. Then, the dam plate 110 is inserted on the deposit, and the dam plate 110 is lifted by the thickness of the deposit, and the level of the electrolytic solution is increased. Therefore, there exists a problem that the adjustment precision of the liquid level height of electrolyte solution worsens.
In addition, by removing the deposit on the bottom of the barrier plate receiver 120, the accuracy of adjusting the liquid level is restored, but the inside of the barrier plate receiver 120 is narrow, making it difficult to remove the deposit. There is.

JP 2001-014036 A

  In view of the above circumstances, an object of the present invention is to provide a weir for an electrolytic cell in which solid matter hardly accumulates on the bottom of a weir plate receiver.

The weir for an electrolytic cell of the first invention is a weir provided in an electrolytic solution discharge part of the electrolytic cell, and a weir plate in which an opening through which the electrolytic solution in the electrolytic cell flows is formed, and in the electrolytic cell And a box-shaped dam plate receptacle into which the dam plate is inserted. It is formed.
The weir for an electrolytic cell of the second invention is characterized in that, in the first invention, the discharge port is formed on a side wall of the weir plate receiver.
The weir for an electrolytic cell according to a third aspect of the present invention is characterized in that, in the first aspect, the discharge port is formed at the bottom of the weir plate receiver.
The weir for an electrolytic cell according to a fourth aspect of the present invention is characterized in that, in the first aspect, the discharge port is formed at a corner of the weir plate receiver.
The weir for an electrolytic cell of the fifth invention is characterized in that, in the second or third invention, the discharge port is formed in a horizontally long slit shape.
The electrolytic cell weir of the sixth invention is characterized in that, in the second or third invention, the discharge port is formed in a circular shape.

According to the first invention, since the discharge port is formed in the barrier plate receiver, the solid matter that has flowed into the barrier plate receiver is discharged from the discharge port and is unlikely to accumulate on the bottom of the barrier plate receiver. Moreover, even if solid matter accumulates on the bottom of the dam plate receiver, the deposit can be discharged from the discharge port, so that the deposit can be easily removed.
According to the second invention, since the discharge port is formed on the side wall of the barrier plate receiver, the deposit can be discharged from the discharge port by simply inserting and removing the barrier plate from the barrier plate receiver, and the deposit can be easily removed. is there.
According to the third aspect of the invention, since the discharge port is formed at the bottom of the barrier plate receiver, the solid matter that has flowed into the barrier plate receiver is unlikely to accumulate on the bottom of the barrier plate receiver.
According to the fourth aspect of the invention, since the discharge port is formed at the corner of the dam plate holder where the solid matter is likely to stay, the solid matter that has flowed into the dam plate holder is unlikely to accumulate on the bottom of the dam plate receiver.
According to the fifth aspect of the invention, since the discharge port is formed in a horizontally long slit shape, the deposit solidified in a plate shape can be discharged from the discharge port, and the deposit can be easily removed.
According to the sixth aspect of the invention, since the discharge port is formed in a circular shape, it can be easily formed with a hole saw or a drill.

(A) is explanatory drawing of the whole image of an electrolytic cell, (b) is side surface sectional drawing of the weir concerning 1st Embodiment of this invention. (A) is a sectional view taken along line IIa-IIa in FIG. 1 (b), (b) is a sectional view taken along line IIb-IIb in FIG. 1 (b), and (c) is IIc-IIc in FIG. 1 (b). FIG. It is explanatory drawing of the state which inserted the (a) dam plate of the same dam, and the state which lifted the (b) dam plate. It is a front view of a weir according to a second embodiment of the present invention. It is a front view of a weir according to a third embodiment of the present invention. It is a front view of a weir according to another embodiment. It is sectional drawing of the conventional dam side view. (A) is a sectional view taken along line VIIIa-VIIIa in FIG. 7, (b) is a sectional view taken along line VIIIb-VIIIb in FIG. 7, and (c) is a sectional view taken along line VIIIc-VIIIc in FIG. It is explanatory drawing of the state which inserted the (a) dam plate of the conventional dam, and the state which lifted the (b) dam plate.

Next, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1 (a), the weir according to the present invention is provided in an electrolytic solution discharge part of an electrolytic cell E used for electrolytic purification or electrolytic collection of copper, gold, nickel, cobalt, lead, zinc or the like. It is. Here, the electrolytic solution discharging unit means a portion for discharging the electrolytic solution after being used for electrolytic purification or electrolytic collection from the electrolytic cell E. In addition, the electrolyte solution circulates in the electrolyte solution circulation system, and impurities are removed from the electrolyte solution discharged from the electrolyte solution discharge unit in the cleaning step, and the electrolyte solution is supplied to the electrolytic cell again.

(First embodiment)
As shown in FIGS. 1B and 2, the electrolytic solution discharge portion of the electrolytic cell E has a recess formed in the upper edge of the side wall, and the drainage box B is fitted in the recess. The drainage box B is open inside the electrolytic cell E (the right side in FIG. 1 (b)) without a wall surface, and protrudes outside the electrolytic cell E (the left side in FIG. 1 (b)). Inside the drainage box B, the weir 1 according to the first embodiment of the present invention is provided near the inside of the electrolytic cell E. The inside of the electrolytic cell E and the drainage box B are partitioned by this weir 1. ing. A drainage pipe P is connected to the bottom of the drainage box B outside the electrolytic cell E.

  The weir 1 includes a weir plate 10 and a weir plate receiver 20. The dam plate 10 is a plate-like member, and a pentagonal opening 11 having a V-shaped lower edge is formed in the vicinity of the center thereof (see FIGS. 2B and 2C). The barrier plate receiver 20 is a box-shaped member into which the barrier plate 10 is inserted from above, and has rectangular openings on the side walls 21 and 22 on the electrolyzer E side and the drainage box B side, respectively, toward the upper left and right centers. A portion 23 is formed (see FIGS. 2B and 2C).

  The barrier plate receiver 20 is formed with a horizontally long slit-shaped discharge port 24 below the opening 23 on the side wall 21 on the electrolytic cell E side (see FIG. 2C). The discharge port 24 is formed at the same height so that the lower edge thereof does not form a step with the bottom surface inside the dam plate receiver 20. In addition, the discharge port is not formed in the side wall 22 on the drainage box B side of the dam plate receiver 20, and a portion other than the opening 23 is closed (see FIG. 2B).

  As shown in FIG. 3 (a), the electrolytic solution in the electrolytic cell E flows out into the drainage box B through the opening 11 of the dam plate 10 and the opening 23 of the dam plate receiver 20, and the drainage pipe P Discharged from. Therefore, the liquid level height of the electrolytic solution in the electrolytic cell E is determined by the height position of the opening 11 of the barrier plate 10. Since the opening 11 has a V-shaped lower edge, when the flow rate of the electrolyte supplied to the electrolytic cell E is small, the liquid level of the electrolyte is lowered with respect to the opening 11. When the width of the electrolyte discharged from the portion 11 becomes narrow and the flow rate of the electrolyte supplied to the electrolytic cell E is large, the liquid level of the electrolyte rises with respect to the opening 11 and is discharged from the opening 11. The width of the electrolyte is increased. Therefore, the flow rate of the electrolytic solution supplied to and discharged from the electrolytic cell E can be confirmed from the width of the electrolytic solution discharged from the opening 11.

  As shown in FIG. 3 (b), the dam plate 10 is lifted upward with respect to the dam plate receiver 20 (22) to increase the height position of the opening 11, so that the electrolyte solution in the electrolytic cell E is increased. The liquid level can be increased. Here, a pin insertion hole is formed in the barrier plate 10, and when the pin 25 is inserted into the pin insertion hole, the tip of the pin 25 can be protruded from the surface of the barrier plate 10. Therefore, if the barrier plate 10 is lifted upward with respect to the barrier plate receiver 20 and the pin 25 is inserted into the pin insertion hole, the pin 25 is locked to the upper edge of the barrier plate receiver 20, and the barrier plate 10 is fixed to the barrier plate. It can be maintained in a state where it is lifted upward with respect to the receptacle 20. The weir plate 10 is formed with one pin insertion hole or a plurality of positions with different heights. Therefore, the height position of the barrier plate 10 can be adjusted stepwise depending on the state where the pin 25 is not inserted, the state where the pin 25 is inserted, and the height where the pin 25 is inserted. And the liquid level height of the electrolyte solution in the electrolytic cell E can be adjusted in steps by adjusting the height position of the barrier plate 10 in steps.

  As described above, since the discharge port 24 is formed in the side wall 21 of the barrier plate receiver 20, the inside of the barrier plate receiver 20 and the electrolytic cell E communicate with each other through the discharge port 24. Therefore, even if solids such as suspended matter and precipitates in the electrolyte flow into the dam plate receiver 20, the solids can be discharged from the discharge port 24 to the electrolytic cell E. For this reason, it is difficult for solid matter to accumulate on the bottom of the barrier plate receiver 20.

  Even if solid matter accumulates on the bottom of the barrier plate receiver 20, the deposit can be discharged from the discharge port 24 to the electrolytic cell E. Here, since the discharge port 24 is formed in the side wall 21 of the barrier plate receiver 20, the deposit can be discharged from the discharge port 24 only by inserting and removing the barrier plate 10 from the barrier plate receiver 20. Further, since the discharge port 24 is formed in a horizontally long slit shape, deposits solidified in a plate shape can be discharged from the discharge port 24. Thus, the deposit can be easily removed. In addition, since the insertion and removal of the barrier plate 10 is an operation that is periodically performed in order to move the liquid surface height of the electrolytic solution in the electrolytic cell E up and down, the deposit of the deposit is not particularly noticed by the worker. Removal is performed.

  As described above, since solids are unlikely to deposit on the bottom of the barrier plate receiver 20, it is possible to prevent the barrier plate 10 from being inserted on the deposits and lifting the barrier plate 10, and to increase the liquid level of the electrolyte. Deterioration of adjustment accuracy can be prevented. Therefore, for example, in electrolytic refining of copper, the liquid level height of the electrolytic solution in the electrolytic cell E can be accurately adjusted, and the appearance quality of the obtained electrolytic copper can be improved.

  In addition, although the width dimension and height dimension of the discharge port 24 can be set arbitrarily, it is preferable to set it to the dimension which is hard to deposit a solid substance and can remove a deposit easily.

  Moreover, in this embodiment, since the discharge port 24 is formed in the side wall 21 by the side of the electrolytic cell E, the solid substance which flowed into the inside of the barrier plate receiver 20 is discharged from the discharge port 24 to the electrolytic cell E. Generally, since an apparatus for collecting and removing precipitates is attached to the electrolytic cell E, solid matter discharged from the discharge port 24 to the electrolytic cell E is collected and removed by the device. Therefore, it is not necessary to separately provide a device for processing the discharged solid matter.

  Further, instead of the side wall 21 on the electrolytic cell E side, a discharge port 24 may be formed on the side wall 22 on the drainage box B side. In this case, the solid matter that has flowed into the barrier plate receiver 20 is discharged from the discharge port 24 to the drainage box B. Since the flow of the electrolyte solution is fast in the drainage box B, even if the dam plate 10 is inserted and removed, the electrolyte solution is less likely to scatter due to this, and it is safe. In general, since the operator inserts and removes the barrier plate 10 from the outside of the electrolytic cell E, it is easy to confirm whether or not solid matter is discharged from the discharge port 24.

(Second Embodiment)
As shown in FIG. 4, the weir 2 according to the second embodiment of the present invention is obtained by replacing the slit-like discharge port 24 in the weir 1 according to the first embodiment with a circular discharge port 24. Two outlets 24 are formed at the lower corners of the side wall 21 on the electrolytic cell E side. Such a circular outlet 24 can be easily formed with a hole saw or a drill. Since the remaining structure is the same as that of the weir 1 according to the first embodiment, the same reference numerals are assigned to the same members and the description thereof is omitted. The discharge port 24 may be formed in the side wall 22 on the drain box B side.

  Even if the discharge port 24 is formed in a circular shape in this way, the solid matter that has flowed into the barrier plate receiver 20 can be discharged from the discharge port 24 to the electrolytic cell E. Hard to deposit on. Even if solid matter accumulates on the bottom of the barrier plate receiver 20, the deposit can be discharged from the discharge port 24 to the electrolytic cell E.

(Third embodiment)
As shown in FIG. 5, the weir 3 according to the third embodiment of the present invention has a circular outlet 24 in the weir 2 according to the second embodiment formed in one place at the left and right center of the side wall 21 on the electrolytic cell E side. It is a thing. Since the remaining structure is the same as that of the weir 2 according to the second embodiment, the same members are denoted by the same reference numerals and description thereof is omitted. The discharge port 24 may be formed in the side wall 22 on the drain box B side.

  Thus, the position and the number of the discharge ports 24 can be arbitrarily set. However, it is preferable to set so that solids are difficult to deposit and the deposits can be easily removed.

(Other embodiments)
As shown in FIG. 6, two rectangular discharge ports 24 may be formed at the lower corners of the side wall 21. In general, solid matter that has flowed into the inside of the barrier plate receiver 20 tends to stay in the corners inside the barrier plate receiver 20. Therefore, by forming the discharge port 24 at the corner, the solid matter is easily discharged, and it is difficult to deposit on the bottom of the barrier plate receiver 20. The discharge port 24 may be formed in the side wall 22 on the drain box B side.

In the above embodiment, the discharge port 24 is formed on the side walls 21 and 22 of the barrier plate receiver 20, but the discharge port 24 may be formed on the bottom of the barrier plate receiver 20. In this case, it is necessary that the barrier plate receiver 20 protrudes and is fixed to the electrolytic cell E side or the drainage box B side so that the bottom of the barrier plate receiver 20 is opened to the electrolytic cell E or the drainage box B. .
If the discharge port 24 is formed at the bottom of the dam plate receiver 20, the solid matter that has flowed into the dam plate receiver is less likely to accumulate.

Next, examples will be described.
First, the electrolytic solution is flowed into the electrolytic cell provided with the weir 1 (Example 1) according to the first embodiment shown in FIG. 1 and the electrolytic cell provided with the conventional weir 101 (comparative example) shown in FIG. Electrolytic purification was performed for 240 hours while supplying at 12 L / min.
Thereafter, when the amount of the solid material deposited inside the dam plate holder was measured, Example 1 was about 25% less than the comparative example. From this, it was confirmed that the weir according to the present invention has a structure in which solid matter is less likely to be deposited on the weir plate receiver than the conventional weir.

Next, after depositing a predetermined amount of solid matter on the weir plate according to the present invention (Examples 2 to 6) and the weir plate receiver of the conventional weir 101 (comparative example) shown in FIG. did. Here, Example 2 is the weir 1 according to the first embodiment shown in FIG. 1, in which the discharge port 24 has a width of 155 mm and a height of 120 mm, and Example 3 is shown in FIG. The weir 1 according to the first embodiment is such that the discharge port 24 has a width dimension of 155 mm and a height dimension of 56 mm. Example 4 is the weir 2 according to the second embodiment shown in FIG. The diameter of the discharge port 24 is 56 mm. Example 5 is the weir 2 according to the second embodiment shown in FIG. 4 and the diameter of the discharge port 24 is 25 mm. 5 is a weir 3 according to the third embodiment shown in FIG.
Thereafter, the amount of solid matter remaining in the barrier plate receiver was measured, and the ratio of the amount of solid matter discharged from the barrier plate receiver to the amount of deposited solid matter was obtained, and the results shown in Table 1 were obtained.

  As shown in Table 1, the ratio of the amount of solid matter discharged from the dam plate receiver to the amount of solid matter deposited was 20% in the comparative example, while Examples 25 to 6 were 98 to 25 %Met. From this, it was confirmed that the weir according to the present invention has a structure in which solid matter is more easily discharged from the weir plate receiver than the conventional weir. In Example 2, 98% of solids were discharged, and it was found that the discharge performance of solids was particularly high.

Next, after depositing 21 g of solid matter on the weir plate according to the present invention (Examples 4 to 6) and the weir plate receiver of the conventional weir 101 (comparative example) shown in FIG. After washing with water, the time taken to remove the solid was measured. Washing with water was performed using a hose with an inner diameter of 20 mm at a flow rate of 0.3 L / sec.
As a result, the results shown in Table 2 were obtained.

  As shown in Table 2, the water washing time required for removing the solid matter was 5.6 seconds for the comparative example, whereas it was 3.6 to 5.2 seconds for the examples 4 to 5. From this, it was confirmed that the weir according to the present invention can be easily removed by washing with water compared to the conventional weir.

Next, solid matter was deposited on the weir plate receptacle of the conventional weir 101 shown in FIG. 7, and the relationship between the amount of the solid matter and the height of the weir plate lifted thereby was measured.
As a result, the results shown in Table 3 were obtained.

  As shown in Table 3, it was confirmed that the weir plate lifted as the amount of solid matter deposited on the weir plate receiver increased. As a result, the weir according to the present invention has a structure in which solid matter is hard to be deposited on the shroud receptacle and the deposited solid matter can be discharged, so that the weir plate is inserted on the deposit and the weir plate is lifted. It was confirmed that the deterioration of the adjustment accuracy of the liquid surface height of the electrolytic solution could be prevented.

1, 2, 3 Weir 10 Dam plate 11 Opening portion 20 Weir plate receptacle 21, 22 Side wall 23 Opening portion 24 Discharge port 25 Pin

Claims (6)

A weir provided in the electrolyte discharge part of the electrolytic cell,
A dam plate formed with an opening through which the electrolytic solution in the electrolytic cell flows out;
An opening through which the electrolytic solution in the electrolytic cell flows out is formed, and a box-shaped dam plate receiver into which the dam plate is inserted, and
The dam for an electrolytic cell, wherein the dam plate receptacle is formed with a discharge port for discharging solid matter flowing into the dam plate receptacle. 2. The weir for an electrolytic cell according to claim 1, wherein the discharge port is formed on a side wall of the weir plate receiver. 2. The weir for an electrolytic cell according to claim 1, wherein the discharge port is formed at the bottom of the weir plate receiver. The weir for an electrolytic cell according to claim 1, wherein the discharge port is formed at a corner of the weir plate receiver. 4. The dam for an electrolytic cell according to claim 2, wherein the discharge port is formed in a horizontally long slit shape. 4. The dam for an electrolytic cell according to claim 2, wherein the discharge port is formed in a circular shape.

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