• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Electrolytic process and device for parallel injection. The invention discloses an electrolytic process of injection in parallel, in which an electrolyte after being pressurized is injected in parallel, from a position in the lower part and close to a surface of a cathode, at a speed of 0.5 to 2.5 m/s in a space between the cathode and an anode. During the production process, the pressurized electrolyte is injected parallel along the surface of the cathode and the electrolyte flows from the lower part to the upper part on the cathode side and moves simultaneously from the upper part to the lower part in the cathode. Side of the anode, which thus achieves a function of lateral curtain on the cathode and anode, forming an internal circulation between the cathode and the anode, filling cu2 with the cathode, accelerating the speed diffusion of cu2 at the anode, and eliminating concentration polarization; and, at the same time, the lateral curtain flow of the electrolyte from the top to the bottom at the anode is able to greatly increase the deposition rate of the anode sludge and prevent its adhesion to the anode to form a layer of anode sludge, thus avoiding the anode passivation. The invention also provides an electrolytic injection device in parallel. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2606021A1
    申请号:ES201630229
    申请日:2016-02-26
    公开日:2017-03-17
    发明作者:Songlin Zhou；Wantao Ning；Junjiang Gao
    申请人:Yanggu Xiangguang Copper Co Ltd；
    IPC主号:
    专利说明:

    ELECTROLYTIC PROCESS AND DEVICE FOR PARALLEL INJECTION

    FIELD OF THE INVENTION

    The invention relates to the technical field of non-ferrous metal metallurgy, in particular to a parallel electrolytic injection process and a parallel electrolytic injection device.

    BACKGROUND OF THE INVENTION

    The electrolytic refining process is suitable primarily for electrolytic refining and purification of metals such as copper, lead, nickel and the like, in which a raw metal serves as an anode, a pure metal serves as a cathode, and a solution containing ions of this metal serves as an electrolyte; The metal dissolves from the anode and precipitates into the cathode. Among the impurities in the raw metal, the inactive ones do not dissolve but become mud of the anode; since the metal having a higher electrode potential is preferably precipitated in the cathode, and the electrode potential of each metal is determined by the standard electrode potential and the concentration of the metal ions, thus the assets cannot precipitate in the cathode due to a lower concentration of ions thereof, although it dissolves in the anode.

    The metal in an electrolytic process follows the laws of Faraday. Taking copper as an example, its amount of electrolytic precipitation can be represented by the following equation:

    mCu = n × 1.1852 × i × W × t (1)

    In the equation: mCu is the mass (g) of the precipitated metal, i is the current density (A / m2), t is the time (s), A is the area (m2) of the cathode plate, and n is the number of electrolytic tanks (1).

    As can be seen from equation (1), under the hypothesis of existing process equipment and technologies, the only means of improving productivity is to increase the current density. However, in the practice of production, in case of simply increasing the density of the current, the metallic precipitation in the cathode is accelerated, which tends to cause a decrease in the concentration of the metal ion Cu2 + near the cathode, specifically , to generate the polarization of concentration, resulting in a decrease in the electrode potential, making the main metal unable to precipitate preferentially on the cathode, leading to the precipitation of metal impurities and affecting the quality of the products. An increase in the current density at the anode causes the anode to dissolve too quickly, making the Cu2 + produced by the dissolution of the anode unable to leave the interface between the anode and the solution to diffuse rapidly into the cathode region, leading also to a polarization of concentration. If the concentration of Cu2 + in the anode region reaches saturation or supersaturation, copper oxidizes or insoluble salts will be produced and deposited on the surface of the anode, which will delay the anode reaction, increase the anode potential, and result in The contamination of the electrolyte 40 due to the dissolution of a large number of impurity ions within the electrolyte, in more severe cases it will even result in the passivation of the anode, thereby increasing energy consumption.

    In addition, as for the anode plate with high impurities comprising a large amount of impurities such as Pb, As, Sb, Bi, Ni and the like, a relatively thick layer of mud of the anode will be deposited on the surface of the plate of the anode during the electrolytic process, and failure to deposit on time will affect the migration and diffusion of Cu2 + and in severe cases will result in the passivation of the anode. Consequently, the polarization of concentration and the passivation of the anode are main factors that cause the limitation in the increase of the current density in the electrolytic refining processes.
     fifty
    Consequently, how to provide an electrolytic process that is capable of eliminating concentration polarization and preventing the occurrence of the anode passivation phenomenon becomes a fundamental technical problem that urgently needs to be solved by those skilled in the art.

    SUMMARY OF THE INVENTION 55

    In view of this, the invention provides a parallel injection electrolytic process and a parallel injection electrolytic device to achieve an object of eliminating concentration polarization and avoiding the phenomenon of passivation of the anode.
     60
    To carry out the above object, the invention provides a technical solution as follows.

    A parallel injection electrolytic process is provided, in which an electrolyte after
    having been pressurized it is injected in parallel from a position at the bottom and close to the surface of a cathode at a speed of 0.5 to 2.5 m / s in a space between the cathode and an anode.

    Preferably, the electrolyte is supplied to a pressurization device by a supply pump and is pressurized, and the electrolyte has a pressure of 0.5 to 1 MPa. 5

    Preferably, the electrolyte is injected into the space between the cathode and the anode as two flows, in which the first flow is injected in a flat shape parallel to the cathode surface, forming a liquid curtain wall in the form of a proximal fan the cathode surface; and the second flow is injected from the side of the first flow that is furthest from the cathode. The electrolyte flows from the bottom to the top along the surface of the cathode on the side of the cathode, and moves simultaneously from the top to the bottom along a surface of the anode on the side of the anode, forming an internal circulation.

    Preferably, the electrolyte is injected horizontally from one side at the bottom of the cathode. Alternatively, the electrolyte is injected horizontally from both sides simultaneously in the lower part of the cathode.

    Preferably, the electrolyte is injected vertically upwards in a flat shape parallel to the cathode surface from the bottom of the cathode, forming a fan-shaped liquid curtain wall close to the cathode surface. twenty

    Preferably, the current density is from 400 to 600 A / m2.

    Preferably, a heat exchanger is provided between the supply pump and the pressurization device. 25

    A parallel injection electrolytic device is provided, which includes:

    a parallel injection device provided within an electrolytic tank and having multiple groups of nozzles provided therein, in which each group of nozzles are oriented towards a space between a cathode and an anode and each group of nozzles are parallel between yes and close to the side of the cathode, for the parallel injection of an electrolyte from the bottom near the surface of the cathode into the space between the cathode and the anode; Y

    a pumping device for supplying the electrolyte within a circulation tank of the electrolyte device to the parallel injection device, including a supply pump and a pressurizing device that are sequentially connected in the direction from the circulation tank to the device parallel injection.

    Preferably, a first liquid outlet passage and a second liquid outlet passage are provided side by side on the nozzles, in which the first liquid outlet passage in a flat shape is parallel to the cathode surface in its longitudinal direction and closer to the cathode in relation to the second liquid outlet passage.

    Preferably, the parallel injection device is provided on one side or two sides of the inner side wall of the electrolytic tank, with the nozzles oriented horizontally towards the space between the cathode and the anode.

    Preferably, the flat liquid outlet passages are provided on the nozzles.
     fifty
    Preferably, the parallel injection device is provided at the bottom of the electrolytic tank, with the nozzles facing upward towards the space between the cathode and the anode.

    As can be seen from the above technical solutions, in the electrolytic parallel injection process provided in accordance with the invention, after the electrolyte is pressurized, it is injected in parallel from a position at the bottom and close to the surface of the cathode with a speed of 0.5 to 2.5 m / s within the space between the cathode and the anode. The invention also provides a parallel injection electrolytic device that includes a parallel injection device and a pumping device, in which the parallel injection device is provided within an electrolytic tank and has multiple groups of nozzles provided on the same, each group of nozzles oriented towards the space 60 between the cathode and the anode, and each group of nozzles parallel to each other and close to the side of the cathode, for electrolyte injection in parallel from the bottom near the surface of the cathode within the space between the cathode and the anode; and the pumping device is used for the supply of the electrolyte inside the circulation tank of the electrolyte device to the parallel injection device, including a supply pump and a pressurization device that are sequentially connected in the direction 65
    from the circulation tank to the injection device in parallel. With the electrolytic parallel injection process and device described above, during the production process, the pressurized electrolyte is injected in parallel from the position at the bottom and close to the cathode surface, therefore the electrolyte flows along from the surface of the cathode from the bottom to the top on the side of the cathode; meanwhile, on the anode side, since metal ions have a relatively high concentration and a relatively large specific gravity, the old electrolyte has a tendency to move down, and therefore under the impulse of the new electrolyte filled with a Relatively smaller specific gravity, the electrolyte moves from the top to the bottom along the surface of the anode, which in turn achieves a lateral cutting function on the cathode and anode, forming a forced internal circulation between the cathode and anode, filling with Cu2 + in the cathode, accelerating the diffusion rate 10 of the generated Cu2 +, and eliminating concentration polarization; and at the same time, the lateral cutting flow of the electrolyte from the top to the bottom at the anode is capable of greatly increasing the deposition rate of the mud at the anode and preventing its adhesion to the anode to form a layer of anode mud , thereby avoiding the passivation of the anode.
     fifteen
    DESCRIPTION OF THE DRAWINGS

    To illustrate the examples of the invention or the technical solutions of the prior art more clearly, the drawings that are necessary to describe the examples or prior art are briefly introduced below; clearly, the drawings described below are only certain examples of the invention, and for the 20 experts in the field, other drawings can also be obtained in accordance with these drawings on the hypothesis of no creative work.

    Figure 1 is a flow chart of a parallel injection electrolytic process provided in accordance with an example of the invention. 25

    Figure 2 is a structural representation of a parallel electrolytic injection device provided in accordance with an example of the invention.

    Figure 3 is a diagram of the path of movement of an electrolyte between a cathode and an anode 30 of a parallel injection electrolytic device provided in accordance with an example of the invention.

    Figure 4 is a structural representation of a nozzle of a parallel injection electrolytic device provided in accordance with an example of the invention.
     35
    Figure 5 is a top view of an electrolytic tank of a parallel injection electrolytic device provided in accordance with an example of the invention.

    Figure 6 is a front view of an electrolytic tank of a parallel injection electrolytic device provided in accordance with an example of the invention. 40

    Figure 7 is a side view of an electrolytic tank of a parallel injection electrolytic device provided in accordance with an example of the invention;

    Figure 8 is a structural representation of a nozzle of a parallel electrolytic injection device provided in accordance with another example of the invention.

    Figure 9 is a front view of an electrolytic tank of a parallel injection electrolytic device provided in accordance with another example of the invention.
     fifty
    Figure 10 is a side view of the electrolytic tank of a parallel injection electrolytic device provided in accordance with another example of the invention.

    DETAILED DESCRIPTION OF THE INVENTION
     55
    The invention provides a parallel injection electrolytic process and a parallel injection electrolytic device to achieve an object of eliminating concentration polarization and avoiding the phenomenon of anode passivation.

    The technical solutions according to the examples of the invention are clearly and completely described below with reference to the drawings in the examples of the invention. Clearly, the examples described are only part of the examples according to the invention, instead of all the examples. All other examples obtained by those skilled in the art under the premise of no creative work, based on the examples according to the invention, fall within the scope claimed by the invention.
     65
    Reference is made to Figure 1 and Figure 1 is a flow chart of a parallel injection electrolytic process provided in accordance with an example of the invention.

    The invention provides a parallel electrolytic injection process, in which an electrolyte after being pressurized is injected in parallel from a position at the bottom and close to the surface of a cathode at a speed of 0.5 m / s 2.5 m / s within a space between the cathode and an anode.

    Compared to the prior art, in the electrolytic parallel injection process provided in accordance with the invention, since the pressurized electrolyte is injected in parallel from the bottom along the surface of the cathode plate, the electrolyte flows to along the surface of the cathode from the bottom to the top on the side of the cathode; and at the same time, on the anode side, since metal ions have a relatively high concentration and a relatively large specific gravity, the old electrolyte has a tendency to move down, and therefore under the impulse of the new electrolyte filled with a Relatively small specific gravity, the electrolyte moves from the top to the bottom along the surface of the anode, which in turn achieves a lateral cutting function on cathode 15 and anode, forming a forced internal circulation between the cathode and anode, filling the cathode with Cu2 +, accelerating the diffusion rate of Cu2 + in the anode, eliminating concentration polarization, thus being able to improve productivity by increasing the current density; and at the same time, the lateral cutting flow of the electrolyte from the top to the bottom at the anode is capable of greatly increasing the deposition rate of the anode mud and preventing its adhesion to the anode to form a layer 20 of anode mud , thereby avoiding the passivation of the anode.

    Additionally, the electrolyte is supplied from a circulation tank to the pressurization device by means of a supply pump and is pressurized, and the electrolyte has a pressure of 0.5 to 1 MPa.
     25
    The supply pump can use various configurations. According to an example of the invention, the supply pump is a variable frequency pump. By using the variable frequency pump, the operating parameters of the variable frequency pump can be adjusted according to the production requirements during the production process to achieve the purpose of controlling the electrolyte flow and allowing it to comply with Production requirements 30

    The anode mud floating in the electrolyte tends to adhere mechanically to the cathode surface, which affects the quality of electrolytic copper. To avoid the occurrence of this phenomenon, according to an example of the invention, the electrolyte is injected into the space between the cathode and the anode as two flows, in which the first flow is injected in a flat form parallel to the surface of the cathode, forming a fan-shaped liquid curtain wall near the surface of the cathode; and the second flow is injected from the side of the first flow that is remote from the cathode. The electrolyte flows from the bottom to the top along the surface of the cathode on the side of the cathode, and moves simultaneously from the top to the bottom along a surface of the anode on the side of the anode, forming a internal circulation As can be seen, by dividing the injected electrolyte into two flows, the first flow protects the cathode from contamination with the mud of the anode allowing the new electrolyte to form a fan-shaped liquid curtain wall on the cathode surface, and at the same time, the second flow drives the electrolyte between the cathode and the anode to form an internal circulation, eliminating concentration polarization.

    When the injection form described above is used, the electrolyte is injected horizontally from one side at the bottom of the cathode. Alternatively, the electrolyte is injected horizontally from both sides at the bottom of the cathode simultaneously.

    Naturally, the electrolytic parallel injection process can also employ other forms of injection. In another example according to the invention, the electrolyte is injected into the space between the cathode and the anode as a flow; and the electrolyte is injected in a flat shape parallel to the cathode surface, forming a fan-shaped liquid curtain wall close to the cathode surface. Additionally, when the injection form described above is used, the electrolyte needs to be injected vertically upwards from the bottom of the cathode.
     55
    The low current density is a main factor that limits the productivity of the electrolytic process in the prior art, the parallel injection electrolytic process provided in accordance with the invention is capable of forming a forced internal circulation between the cathode and the anode, facilitating the exchange and filling of Cu2 + between the cathode and the anode. Therefore, the electrolytic parallel injection process provided in accordance with the invention can increase the current density to 400 to 600 A / m2, which represents an increase of 200% or more compared to the current density of 280 A / m2 in the traditional process, therefore productivity can be greatly improved.

    Additionally, to save energy and reduce emissions, a heat exchange is provided between the supply pump and the pressurization device in an example of the invention. 65
    The electrolytic parallel injection process provided in accordance with the invention can process high impurity anode plates having chemical constituents of Cu ≥ 97%, Pb ≤ 1%, As ≤ 1%, Bi ≤ 0.5%, and Ni ≤ 0.5% Compared to the traditional process, the impurity content of the anode copper that can be processed is 5-10 times higher, the efficiency of the current is up to 99.0% or more, the residue rate at the anode is as low as 13%, and the grade of copper in the cathode is 99.9975 5% or more.

    With reference to Figures 2 and 3, Figure 2 is a structural representation of a parallel injection electrolytic device provided in accordance with an example of the invention, and Figure 3 is a diagram of the path of motion of an electrolyte between a cathode and an anode of a parallel injection electrolytic device 10 provided in accordance with an example of the invention.

    The invention also provides a parallel injection electrolytic device that includes a parallel injection device 4 and a pumping device.
     fifteen
    Among others, the parallel injection device 4 is provided within an electrolytic tank 1 and has multiple groups of nozzles 41 provided thereon, in which each group of nozzles 41 is oriented towards a space between the cathode 3 and the anode 2 and each group of nozzles 41 are parallel to each other and close to the side of the cathode 3, for the parallel injection of the electrolyte from the lower part close to the surface of the cathode plate 3 within the space between the cathode 3 and the anode 2; and the pumping device 20 is used for the supply of the electrolyte into a circulation tank 7 of the electrolytic device for the parallel injection device 4, and includes a supply pump 6 and a pressurization device 5 that are sequentially connected in the direction from the circulation tank 7 to the parallel injection device 4.
     25
    Compared to the prior art, in the electrolytic parallel injection process provided in accordance with the invention, during the production process, since the pressurized electrolyte is injected in parallel from the bottom along the surface of the plate of the cathode 3 through the parallel injection device 4 after being pressurized in the pressurization device 5, the electrolyte flows from the bottom to the top along the surface of the cathode 3 on the side of the cathode 3; and at the same time, on the side of anode 2, since metal ions have a relatively high concentration and a relatively large specific gravity, the old electrolyte has a tendency to move down, and therefore under the impulse of the new electrolyte filled with a relatively small specific gravity, the electrolyte moves from the top to the bottom along the surface of the anode 2, which in turn achieves a lateral cutting function on the cathode and the anode, forming a circulation forced between the cathode and the anode, filling the cathode 3 with Cu2 +, accelerating the diffusion rate of the Cu2 + in the anode 2, eliminating the concentration polarization, thus being able to improve productivity by increasing the density of current; and at the same time, the lateral cutting flow of the electrolyte from the top to the bottom at the anode 2 is capable of greatly increasing the deposition rate of the mud at the anode and limiting its adhesion to the anode 2 to form a layer of mud of the anode, thereby avoiding the passivation of anode 2.

    In recent years, with the global mining of concentrates, the storage of rich concentrates is gradually decreasing, the degree of concentrates supplied to the smelters of each country decreases, and the content of impurities such as Pb, As, Sb, Bi, Ni and the like in anode 2 produced 45 greatly increases; among others, the anode mud formed by impurities such as As, Sb, Bi and the like due to its small specific gravity will form a floating anode sludge that is suspended in the electrolyte and it is very easy for it to adhere mechanically to the surface of the cathode 3, affecting the quality of electrolyzed copper. Therefore, to prevent adhesion of the floating anode sludge at cathode 3, in an example according to the invention, referring to Figure 4 which is a structural representation of the nozzle of the electrolytic parallel injection device provided according to an example of the invention, a first liquid outlet passage 41a and a second liquid outlet passage 41b are provided side by side on the nozzle 41, wherein the first liquid outlet passage 41a in a flat shape is parallel to the surface of the cathode 3 in its longitudinal direction and closer to the cathode 3 in relation to the second liquid outlet passage 41b; and the electrolyte will form a fan-shaped liquid curtain wall when injected through the first liquid outlet passage 41a flat between the cathode and the anode, which has the ability to effectively prevent the mud from the floating anode reach cathode 3, avoiding adhesion of the floating anode sludge on cathode 3, and improving the quality of electrolytic copper. In addition, the electrolyte injected through the second liquid outlet passage 41b between the cathode and the anode can propel the electrolyte on the side of the cathode 3 to flow from the bottom to the top along the surface of the cathode 3 60 and move simultaneously from the top to the bottom along the surface of the anode 2 on the side of the anode 2, forming an inner circulation. As can be seen from the above, the electrolyte injected from the nozzles 41 above is capable of not only boosting the internal circulation between the cathode and the anode, which increases the volume of circulation and eliminates the concentration polarization, but also forms a liquid curtain wall, which prevents the floating anode sludge from adhering to cathode 3 and improves the quality of 65
    Electrolytic copper.

    Additionally, in an example of the invention, the first liquid outlet passage 41a has a rectangular or elliptical cross section, and the second liquid outlet passage 41b has a circular or elliptical cross section. Naturally, the first liquid outlet passage 41a can also use other shapes, provided that its flat shape can be secured to form a fan-shaped liquid curtain wall.

    With reference to Figures 5 to 7, Figure 5 is a top view of the electrolytic tank of the electrolytic parallel injection device provided in accordance with an example of the invention; Figure 6 is a front view of an electrolytic tank of the electrolytic parallel injection device provided in accordance with an example of the invention; and Figure 7 is a side view of the electrolytic tank of the electrolytic parallel injection device provided in accordance with an example of the invention. When the nozzle 41 is used as described above, the parallel injection device 4 is employed which employs a form of lateral introduction and upper outlet on one side or two sides of the inner side wall 15 of the electrolytic tank 1 , with the nozzle 41 oriented horizontally towards the space between the cathode 3 and the anode 2. In this way, the electrolyte is injected from the side of the cathode plate 3 at the bottom in a horizontal direction, rises between the plate of the cathode and the anode plate along cathode 3, and descends along the surface of the anode plate 2, forming an internal circulation. By supplying the solution from both sides, a good effect of the internal circulation can be ensured in case of a wide cathode and 20 anode. Preferably, the vertical distance of the nozzles 41 and the lower part of the cathode 3 is not less than 10 cm.

    Naturally, the nozzle 41 may also employ other constructions, for example, in another example according to the invention, with reference to Figure 8, which is a structural representation of a nozzle of the electrolytic parallel injection device provided in accordance with Another example of the invention, only a flat liquid outlet passage 41c is provided on the nozzle 41.

    When the nozzles 41 having only one liquid outlet passage 41c described above are used, since only the electrolyte is injected in a fan form, to allow an internal circulation 30 between the cathode and the anode, the electrolytic injection device in parallel provided in accordance with the invention, it cannot use the lateral entry and upper exit circulation form, but instead needs to be modified by using a lower entry and upper exit circulation form, that is, the device for parallel injection 4 is provided in the lower part of the electrolytic tank 1. With reference to Figures 9 and 10, Figure 9 is a front view of the electrolytic tank of the electrolytic parallel injection device 35 provided in accordance with another example of the invention, and Figure 10 is a side view of an electrolytic tank of the electrolytic injection device in p aralelo provided in accordance with another example of the invention; In this form of circulation, the nozzles 41 are oriented upwards towards the space between the cathode 3 and the anode 2, and the electrolyte is injected through the nozzles 41 from the bottom to the top inside the space between the cathode and the anode being close to the plate surface of plate 40 of cathode 3.

    According to an example of the invention, in order to simplify the construction for easy manufacturing, the parallel injection device 4 includes liquid feed pipes and the nozzles 41 are provided on the liquid feed pipes; and at the same time, for easy replacement of the 45 nozzles 41, there is a threaded connection between the nozzle 41 and the liquid supply line. The nozzles 41 can be made of various materials, such as a PVC material, stainless steel and the like.

    To ensure the formation of the internal circulation and the liquid curtain wall, the electrolyte has to be injected at a high speed. Therefore, in an example of the invention, the pumping device includes the pressurization device 5, in addition to the supply pump 6, to increase the electrolyte pressure, to increase its flow rate and to obtain high speed injections. The pressurization device 5 can employ various constructions such as a hole plate or a booster pump, to carry out the pressurization of the electrolyte.
     55
    To allow the flow rate of the electrolyte to be adjusted at any time according to the production requirements, in an example of the invention, the supply pump 6 is a variable frequency pump, and through cooperation between the variable frequency pump and the pressurization device 5, the electrolyte can flow into the electrolytic tank 1 at a speed of 0.5 to 2.5 m / s, which ensures the formation of the internal circulation and the liquid curtain wall. 60

    Each example in the present specification is described in a progressive manner; all that each example highlights are the differences from the other examples, and the same or similar parts between the respective examples can be referenced between them.
     65
    The above descriptions of the disclosed examples may allow those skilled in the art to implement or use the invention. Several modifications to these examples are evident to those skilled in the art, and the general principle defined herein can be implemented in other examples without departing from the spirit or scope of the invention. Therefore, the invention is not limited to these examples illustrated herein, but corresponds to the broader scope consistent with the principles 5 and novel features disclosed herein.
    权利要求:
    Claims (12)
    [1]

    1. An electrolytic parallel injection process, in which an electrolyte after being pressurized is injected in parallel, from a position at the bottom and close to a cathode surface, at a speed of 0.5 to 2 , 5 m / s in a space between the cathode and an anode. 5

    [2]
    2. The electrolytic parallel injection process according to claim 1, wherein the electrolyte is supplied to a pressurization device by a supply pump and pressurized, and the electrolyte has a pressure of 0.5 to 1 MPa .
     10
    [3]
    3. The electrolytic process of parallel injection according to claim 1, wherein the electrolyte is injected into the space between the cathode and the anode as two streams, wherein the first stream is injected in a flat form parallel to the cathode surface, forming a fan-shaped liquid curtain wall close to the cathode surface; the second flow is injected from the side of the first flow that is separated from the cathode; and the electrolyte flows from the bottom to the top along the surface of the cathode 15 on the cathode side, and moves simultaneously from the top to the bottom along a surface of the anode on the side of the anode , forming an internal circulation.

    [4]
    4. The electrolytic parallel injection process according to claim 3, wherein the electrolyte is injected horizontally from one side at the bottom of the cathode; alternatively, the electrolyte is injected horizontally from both sides simultaneously in the lower part of the cathode.

    [5]
    5. The electrolytic parallel injection process according to claim 1, wherein the electrolyte is injected vertically upward in a flat shape parallel to the cathode surface from the bottom of the cathode, forming the liquid curtain wall with fan shape near the surface of the cathode.

    [6]
    6. The electrolytic parallel injection process according to claim 1, wherein a current density is 400 to 600 A / m2.
     30
    [7]
    7. The electrolytic parallel injection process according to claim 1, wherein a heat exchanger is provided between the supply pump and the pressurization device.

    [8]
    8. An electrolytic parallel injection device, comprising:
     a parallel injection device (4) provided within an electrolytic tank (1) and having 35 groups of nozzles (41) provided therein, in which each group of nozzles (41) is oriented towards a space between a cathode (3) and an anode (2) and each group of the nozzles (41) are parallel to each other and close to the side of the cathode (3), for injection of an electrolyte in parallel from the bottom near a surface of the cathode plate (3) within the space between the cathode (3) and the anode (2); Y
     a pumping device for supplying the electrolyte into a circulation tank (7) of the electrolyte device to the parallel injection device (4), including a supply pump (6) and a pressurization device (5) that are sequentially connected in the direction from the circulation tank (7) to the parallel injection device (4).

    [9]
    9. The electrolytic parallel injection device according to claim 8, wherein a first liquid outlet passage (41a) and a second liquid outlet passage (41b) are provided side by side on the nozzle (41), in which the first liquid outlet passage (41a) of a flat shape is parallel to the surface of the cathode (3) in its longitudinal direction and closer to the cathode (3) in relation to the second passage of liquid outlet (41b).
     fifty
    [10]
    10. The electrolytic parallel injection device according to claim 9, wherein the parallel injection device (4) is provided on one side or two sides of the inner side wall of the electrolytic tank (1), with the nozzles (41) oriented horizontally towards the space between the cathode (3) and the anode (2).
     55
    [11]
    11. The electrolytic parallel injection device according to claim 8, wherein a flat liquid outlet passage (41c) is provided on the nozzle (41).

    [12]
    12. The electrolytic parallel injection device according to claim 11, wherein the parallel injection device (4) is provided at the bottom of the electrolytic tank (1) and the nozzles 60 (41) are oriented towards up into the space between the cathode (3) and the anode (2).
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    同族专利:
    公开号 | 公开日
    ES2606021B1|2017-12-29|
    US20170081771A1|2017-03-23|
    CN105040035B|2017-05-31|
    US10041181B2|2018-08-07|
    MX369663B|2019-11-14|
    MX2016002749A|2017-03-16|
    CN105040035A|2015-11-11|
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