CN115652374A - Pulse rotational flow reinforced metal electrolysis device - Google Patents
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Abstract
The invention discloses a pulse rotational flow strengthening metal electrolysis device, which comprises a cylindrical electrolytic tank, wherein the cylindrical electrolytic tank is provided with an upper end cover and a lower end cover, an anode rod is arranged at the center of the electrolytic tank, the anode rod penetrates through the upper end cover to be connected with the anode of a pulse power supply, a cathode sheet is pasted on the inner wall of the electrolytic tank, and the cathode sheet is connected with the cathode of the pulse power supply; the bottom of electrolysis trough is provided with the feed inlet, and the top is provided with the discharge gate, feed inlet and liquid storage pot intercommunication, electrolyte process in the liquid storage pot the feed inlet flows in with tangential direction from bottom to top in the electrolysis trough, electrolyte is in spiral in the electrolysis trough rise with the negative pole piece with the contact of anode rod takes place electrolytic reaction, the metal is in the surface of negative pole piece is appeared. The invention overcomes the problems of serious concentration polarization, serious hydrogen evolution side reaction, low current efficiency, poor cathode product quality and the like in the metal electrolysis process.
Description
Technical Field
The invention relates to a metal electrolysis device, in particular to a pulse rotational flow strengthened metal electrolysis device which can recover metal from electrolyte.
Background
Metal electrolysis refers to the process of electrochemical deposition of a metal or alloy from an aqueous solution, non-aqueous solution or molten salt of its compounds, which is a necessary step in many metal smelting processes. In the traditional flat plate electrolysis, a cathode and an anode are placed in a stagnant tank body, and metal ions are precipitated and separated out at the cathode by controlling certain conditions. In the electrolytic process, the higher the metal ion concentration on the surface of the cathode, the more favorable the electrolytic process is. In the traditional flat plate electrolysis process, metal ions only reach the surface of an electrode through diffusion mass transfer, concentration polarization is serious, serious concentration polarization and hydrogen evolution side reaction exist in the electrolysis process, the problems of low current efficiency, poor product quality and the like are faced, and efficient and clean extraction of metal is difficult to realize.
In order to improve the electrolytic process, improve the quality of the cathode metal product and reduce the energy consumption, researchers have proposed a number of new electrolytic processes, such as pulse electrolysis and cyclone electrolysis. Pulse electrolysis refers to electrolysis by applying a pulse current. When the current is conducted, metal ions are reduced and separated out; when the current is cut off, the discharge ions near the cathode region are restored to the initial concentration through diffusion mass transfer, so that concentration polarization is eliminated. Practice proves that the pulse electrolysis has obvious superiority in refining crystallization, improving cathode metal quality and the like compared with the traditional electrodeposition. The cyclone electrolysis is a novel nonferrous metal separation and extraction technology which strengthens liquid phase mass transfer through the circular flow of electrolyte, effectively eliminates the adverse effect of concentration polarization and realizes the efficient and selective extraction of target metal from low-concentration and complex solution. The method has obvious advantages in technical indexes such as cathode product quality, metal recovery rate, current efficiency and energy consumption.
For metal electrodeposition, the actual precipitation potential of a metal is related to the concentration of metal ions at the surface of the electrode according to the Nernst equation, the higher the concentration, the lower the actual precipitation potential, and the more readily the electrode reaction occurs from a thermodynamic perspective, namely:
E = E 0 -RT/nFlnC s
in the formula: e is the actual precipitation potential, E 0 For standard electrode potential, R is the ideal gas constant, 8.314 J.K -1 ·mol -1 (ii) a T is the temperature of the molten metal,n is the electron transfer number of the half-electrode reaction, F is the Faraday constant, 96485C/mol; cs is the metal ion concentration on the surface of the electrode, mol/L.
During electrolysis, the transfer of ions from the bulk of the electrolyte to the electrode surface involves three modes, diffusion, convection and electromigration, wherein the effect of electromigration is negligible when there is a sufficiently high concentration of supporting electrolyte in the electrolyte, i.e. diffusion and convection are the dominant modes of ionic mass transfer during electrolysis. At a place far away from the surface of the electrode, convection mass transfer is mainly used; and diffusion mass transfer is dominant in the liquid layer near the electrode surface. In order to increase the concentration of metal ions on the surface of the electrode, researchers have developed an electrolysis process that promotes convective mass transfer of an electrolyte by forced convection, such as a cyclone electrolysis process, and an electrolysis process that achieves immediate recovery of the ion concentration on the surface of the electrode by applying a pulse current, i.e., a pulse electrolysis process.
Patent CN102965693A reports an ultrasonic cyclone electrolyzer, which intensifies the electrolysis process by ultrasonic waves and cyclone, but the ultrasonic technology is difficult to be applied to mass production. Patent CN204530000U discloses a membrane cyclone electrolysis device, which combines membrane electrolysis and cyclone electrolysis technologies, but the introduction of the membrane can weaken convection mass transfer, and high-speed moving fluid can cause membrane rupture. The power supplies adopted in the above patents are all direct current power supplies. Patent CN104831314B discloses a high-frequency pulse manganese electrolysis device, but the electrolytic cell used is a traditional flat electrolytic cell, and a lower duty ratio is required to ensure a better ion migration effect.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a pulse rotational flow strengthening metal electrolysis device.
A pulse rotational flow strengthening metal electrolysis device comprises a cylindrical electrolytic tank, wherein the electrolytic tank is provided with an upper end cover and a lower end cover, an anode rod is arranged at the center of the electrolytic tank, the anode rod penetrates through the upper end cover to be connected with the anode of a pulse power supply, a cathode strip is pasted on the inner wall of the electrolytic tank, and the cathode strip is connected with the cathode of the pulse power supply; the bottom of electrolysis trough is provided with the feed inlet, and the top is provided with the discharge gate, feed inlet and liquid storage pot intercommunication, electrolyte process in the liquid storage pot the feed inlet flows in with tangential direction from bottom to top in the electrolysis trough, electrolyte is in spiral rise in the electrolysis trough with the negative pole piece with the contact of anode rod takes place electrolytic reaction, the metal is in the surface of negative pole piece is appeared.
Optionally, the electrolyte after the electrolytic reaction flows out of the discharge port and flows back to the liquid storage tank through a pipeline, and a circulation passage is formed between the electrolytic tank and the liquid storage tank; forming a containing groove capable of containing the fallen metal on the lower end cover; the liquid storage tank is arranged in the heater, and a thermocouple and a thermometer are arranged in the liquid storage tank; the circulating pump is sequentially connected with the flowmeter and the feed inlet through a pipeline; sealing the electrolytic cell by the upper end cap and the lower end cap; the cathode sheet is made of stainless steel or titanium; the anode rod is a titanium anode with an oxide coating; the duty ratio of the pulse power supply is continuously adjustable; the circulating pump is a magnetic circulating pump.
The beneficial effects of the invention are: the invention provides an efficient energy-saving pulse rotational flow enhanced electrolysis device, which solves the problems of serious concentration polarization, serious hydrogen evolution side reaction, low current efficiency, poor cathode product quality and the like in the metal electrolysis process. The device comprises a rotational flow electrolytic tank, a pulse power supply, an electrolyte storage tank and the like. The rotational flow device enhances convective mass transfer by accelerating the flow velocity of the electrolyte, and can effectively reduce the thickness of a diffusion layer; and when the pulse current is interrupted, the reactant ions can transfer mass and supplement to the surface of the electrode in time through diffusion and convection, so that the thickness of the diffusion layer during reaction is further reduced. The combination of the two can further improve the diffusion current density, effectively eliminate concentration polarization and improve the cathode process. The device combines the advantages of pulse electrolysis and cyclone electrolysis, can further optimize the electro-deposition device, improve the duty ratio of pulse current, lighten concentration polarization, improve current efficiency and improve the quality of cathode products, and is particularly suitable for the electrolysis of electrolyte with low concentration, complex components and higher impurity content and metal with negative standard electrode potential.
By adopting the technology, the invention not only reserves the respective advantages of cyclone electrolysis and pulse electrolysis, but also better improves the mass transfer process in the non-conduction time of the pulse current and improves the duty ratio of the pulse signal. The electrolyte has good adaptability, can normally run in a strong acid or strong alkali system, and has long service life. The method can be used for selectively extracting valuable metals in the electrolyte with complex components and high impurity content or improving the current efficiency of metals with negative reduction potential (such as gallium, manganese and the like) according to the metal activity sequence, effectively inhibiting the occurrence of side reactions (hydrogen evolution, impurity ion evolution, electrode corrosion and the like), and improving the purity and the current efficiency of cathode metals.
Although typical pulse or swirl electrolysis can eliminate some of the concentration polarization. However, in the pulse electrolysis process, due to the short interval of the pulse signal, the reactive ions are difficult to replenish to the surface of the cathode through diffusion mass transfer in a very short time, and a low duty ratio is often needed to realize the process, which reduces the efficiency of the electrolysis process. The invention combines the cyclone electrolysis method to effectively eliminate the defect, strengthens convective mass transfer by enabling the electrolyte to flow at high speed in the electrolytic bath, improves the mass transfer process by high-frequency pulse signals, ensures that ions are timely supplemented in the time when the current is not conducted, and can further strengthen the mass transfer process and improve the current efficiency by combining the two methods. Therefore, the pulse rotational flow electrolysis combines the advantages of the two, can effectively and complementarily further optimize the electrolysis process in a cooperative way, and improves the current efficiency and the quality of cathode products.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic diagram of a product of cathode gallium obtained in example.
In the figure: 1-a liquid storage tank, 2-a thermocouple, 3-a thermometer, 4-a discharge port, 5-an upper end cover, 6-an anode bar, 7-a lead, 8-a cathode sheet, 9-a pulse power supply, 10-an electrolytic tank, 11-a lower end cover, 12-a flowmeter, 13-a circulating pump, 14-a feed inlet and 15-a heater.
Detailed Description
The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the present invention when taken in conjunction with the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. The drawings are not intended to be to scale, emphasis instead being placed upon illustrating the principles of the invention.
As shown in FIG. 1, the metal electrolysis device comprises a cylindrical electrolytic bath 10 having an upper end cap 5 and a lower end cap 11, an anode rod 6 is located at the center of the electrolytic bath 10, the anode rod 6 passes through the upper end cap 5 and is connected with the positive electrode of a pulse power supply 9, the inner wall of the electrolytic bath 10 forms a cathode sheet 8, for example, the inner wall of the electrolytic bath 10 is tightly attached with the cathode sheet formed by stainless steel or titanium, and the cathode sheet 8 is connected with the negative electrode of the pulse power supply 9.
The bottom of the electrolytic cell 10 is provided with a feed inlet 14, and the top is provided with a discharge outlet 4. The feed inlet 14 is communicated with the liquid storage tank 1, the electrolyte in the liquid storage tank 1 flows into the electrolytic tank 10 from bottom to top in a tangential direction at a high speed through the feed inlet 14, the electrolyte rises spirally in the electrolytic tank 10 and fully contacts with the cathode sheet 8 and the anode bar 6 to carry out electrolytic reaction, and metal is separated out on the surface of the cathode sheet 8.
The electrolyte after the electrolytic reaction flows out of the discharge port 4 and flows back to the liquid storage tank 1 again through the pipeline, so that a circulation passage is formed between the electrolytic cell 10 and the liquid storage tank 1, and the electrolyte is continuously circulated and electrolyzed in the circulation passage.
Further, the electrolysis apparatus of the present invention may further include a thermocouple 2, a thermometer 3, a lead 7, a flow meter 12, a circulation pump 13, and a heater 15. The liquid storage tank 1 is arranged in a heater 15, a thermocouple 2 and a thermometer 3 are arranged in the liquid storage tank 1, a pipeline of a feeding hole 14 extends into the lower part of the electrolyte level of the liquid storage tank 1, a circulating pump 13 and a flowmeter 12 are communicated with the feeding hole 14 at the lower part of an electrolytic bath 10 through pipelines, and the circulating pump and the flowmeter are connected with the liquid storage tank 1 through a discharging hole 4 to form a loop.
The electrolytic cell 10 is made of stainless steel, the specification is phi 50 x 260 mm, the distance between the cathode and the anode in the electrolytic cell is 25 mm, the upper end and the lower end of the electrolytic cell are respectively sealed by the upper end cover 5 and the lower end cover 11 by adopting screws and rubber rings, and the cathode and anode leads are fixed by adopting nuts. The upper end cover 5 and the lower end cover 11 are provided with grooves for fixing the anode bar 6, the grooves of the lower end cover 11 are deep, a holding groove is formed, for example, the depth is 30 mm, part of metal can fall off from the cathode sheet 8 in the electrolytic process, the fallen metal is located between the cathode sheet 8 and the anode bar 6, the fallen metal easily causes short circuit between the cathode sheet 8 and the anode bar 6, the holding groove can better collect the metal fallen from the cathode sheet 8, and the cathode and the anode are prevented from being directly or indirectly contacted to cause short circuit.
The cathode sheet 8 is made of stainless steel or titanium, is 160 × 250 × 0.3 mm in specification, has a high hydrogen evolution overpotential, can effectively inhibit the occurrence of hydrogen evolution side reaction in the electrolysis process, has good ductility, corrosion resistance and conductivity, can be tightly attached to the inner wall of the electrolytic cell 10, and can be fully contacted with the electrolyte. The anode rod 6 of the cyclone electrolysis device is made of IrO2-Ta2O5 oxide coating titanium anode with the specification of phi 25 x 260 mm. The electrolytic cell has strong adaptability to an electrolytic system, can resist corrosion of strong acid and strong alkali, has long service life and has lower oxygen evolution overpotential on the surface.
The pulse power supply 9 has continuously adjustable frequency, voltage, current, duty ratio and other parameters, can provide stable square wave pulse current, and has commutation time less than 1 ms. The circulating pump 13 is driven by magnetic force, so that the circulating pump has strong acid and alkali corrosion resistance, the circulating flow of the electrolyte can be adjusted to be 0 to 1000L/h, the heat dissipation effect is good, and the temperature of the electrolyte is not greatly influenced. The diameters of the pipelines of the feed inlet 14 and the discharge outlet 4 are phi 20 mm, and the pipelines are made of polytetrafluoroethylene, so that the pipeline has good acid-base corrosion resistance, good temperature resistance, good deformation resistance and easy disassembly and assembly.
When the electrolytic cell works, electrolyte is placed in the liquid storage tank 1 and is heated by the heater 15, the electrolyte enters the electrolytic cell 10 through the feed inlet 14 by the circulating pump 13, the electrolyte flows into the electrolytic cell 10 from bottom to top in a tangential direction at a high speed, and fully contacts with the cathode strip 8 and the anode bar 6 to carry out electrolytic reaction, and metal is separated out on the surface of the cathode strip 8. The electrolyte spirals up in the tank and finally returns to the circulation tank 1 at the upper port 5 through the discharge opening 4. The specific pulse current density and duty ratio are set through the pulse power supply 9, and the circulating pump 13 is controlled to adjust the flow speed and flow of the electrolyte, so that the electrolysis process can run stably. After the electrolysis is carried out for a certain time, the pulse power supply and the circulating pump are closed, the angle is adjusted to discharge the residual electrolyte in the pipeline, the upper end cover is disassembled, the cathode and the anode in the electrolytic cell are taken out, and the cathode plate and the metal falling at the lower end cover are collected.
Specifically, three stages of feeding, electrolysis and peeling can be divided.
In the charging stage, the cathode sheet 8 and the anode bar 6 are placed in the electrolytic cell 10 and fixed, the upper end cover and the lower end cover are fixed and sealed through screws, the lead 7 is fixed by nuts and connected with the pulse power supply 9, and the direction and the angle of the pipeline are adjusted. Electrolyte is added into the liquid storage tank 1 until the upper liquid level of the electrolyte passes through the feed inlet pipeline, the circulating pump 13 and the heater 15 are arranged and started, the electrolyte flows into the electrolytic tank 10 from bottom to top in a tangential direction at a high speed, and the counting of the thermometer 3 and the flowmeter 12 is stable.
And in the electrolysis stage, after the readings of the thermometer 3 and the flowmeter 12 in the charging stage stably reach preset values, the current density, the duty ratio and the frequency of the pulse power supply 9 are set, the pulse power supply 9 is started after the setting is finished, the electrolysis reaction is started, and the electrolyte is fully contacted with the cathode and the anode and reacts under the action of pulse current and smoothness. And after the preset electrolysis time is reached, the pulse power supply 9 is closed.
And a stripping stage, namely after the electrolysis stage is finished, closing the circulating pump 13 and the heating device, adjusting the angle and the position of the pipeline at the discharge port, and pouring out the residual electrolyte in the pipeline and the electrolytic bath. And disassembling the pipeline and the screw, taking out the cathode and the anode in the electrolytic bath, stripping and collecting the metal separated out from the cathode sheet and part of the metal remained on the lower end cover, and washing the obtained metal to obtain a crude metal product.
Example 1: taking 2L of gallium-containing alkaline waste liquid generated in the gallium arsenide waste treatment process, wherein the concentration of gallium acid radical ions is 40.0g/L, the concentration of alkali is 120g/L, and the gallium-containing alkaline waste liquid contains partial impurities such as arsenic, aluminum, silicon and the like, and the specific components are shown in the following table.
| Composition (I) | Ga | As | Al | Si | NaOH |
| Concentration (g/L) | 40.00 | 4.12 | 0.29 | 0.10 | 120 |
The cathode is made of Ti sheet and the pulse current density is 750A/m 2 The frequency is 50Hz, the duty ratio is 0.5, the electrolysis time is 6h, the circulation flow is 200L/h, and the temperature is 30 ℃. The cathode current efficiency reaches 55.26%, the gallium concentration in the electrolyzed solution is 3.72g/L, the gallium recovery rate reaches 92.36%, the total concentration of other ions in the solution is basically unchanged, the total power consumption is about 8561kWh/T gallium, the cathode gallium is subjected to acid cleaning and then is analyzed for impurity content by ICP-MS according to the GB/T10118-2009 high-purity gallium standard, and the result is shown in the following table, the purity of the cathode gallium reaches 99.993% by accounting for the residual Ga, and is shown in figure 2.
| Impurity element | As | Al | Si | Zr | Cr | Cu | Fe | Mg | Mn | Ni | Pb | Zn | Sn |
| Content (ppm) | 1.61 | 1.79 | <10 | 0.31 | 2.54 | 10.1 | 16.1 | 6.33 | 12.1 | 3.55 | 0.18 | 1.20 | 1.00 |
Example 2: taking 2L of the gallium-containing alkaline waste liquid, and placing Ti sheet as cathode material with pulse current density of 750A/m 2 The frequency is 50Hz, the duty ratio is 0.8, the electrolysis time is 6h, the circulation flow is 200L/h, and the temperature is 30 ℃. The cathode current efficiency reaches 56.27%, the gallium concentration in the electrolyzed solution is 3.69 g/L, the gallium recovery rate reaches 92.89%, the total concentration of other ions in the solution is basically unchanged, the total power consumption is about 8532kWh/t gallium, and the purity of the cathode gallium after acid washing is higher than 99.99%.
Example 3: taking 2L of the gallium-containing alkaline waste liquid, wherein the cathode material is Ti sheet, and the pulse current density is 750A/m 2 Frequency of 100Hz, duty ratio of 0.5, electrolysis time of 6h, circulation flow of 200L/h and temperature of 30 ℃. The cathode current efficiency reaches 53.64 percent, the gallium concentration in the electrolyzed solution is 4.01 g/L, the gallium recovery rate reaches 90.54 percent, the total concentration of other ions in the solution is basically unchanged, the total power consumption is about 8864 kWh/t gallium, and the purity of the cathode gallium after acid cleaning is higher than 99.99 percent.
The electrolyte is treated by adopting the traditional flat plate electrolysis, pulse electrolysis and cyclone electrolysis processes under the same condition, and compared with the pulse cyclone reinforced electrolysis process.
Comparative example 1: taking 2L of the gallium-containing alkaline waste liquid, and using Ti sheet as cathode material and DC current density of 750A/m 2 The electrolysis time is 6h, the circulation flow is 200L/h, and the temperature is 30 ℃. The cathode current efficiency reaches 47.92 percent, the gallium concentration in the electrolyzed solution is 4.53g/L, the gallium recovery rate reaches 90.16 percent, the total concentration of other ions in the solution is basically unchanged, and the total power consumption is 9048kWh/t.
Comparative example 2: taking 2L of the gallium-containing alkaline waste liquid, placing in a flat plate electrolytic bath with Ti sheet as cathode material and DC current density of 750A/m 2 The electrolysis time is 6h, and the temperature is 30 ℃. The cathode current efficiency reaches 26.21%, the gallium concentration in the electrolyzed solution is 9.65g/L, the gallium recovery rate reaches 76.34%, the total concentration of other ions in the solution is basically unchanged, and the total power consumption is reduced12650kWh/t.
Comparative example 3: taking 2L of the gallium-containing alkaline waste liquid, placing in a flat electrolytic tank, and adopting a cathode material as a Ti sheet with a pulse current density of 750A/m 2 The frequency is 50Hz, the duty ratio is 0.5, the electrolysis time is 6h, and the temperature is 30 ℃. The cathode current efficiency reaches 32.65%, the gallium concentration in the electrolyzed solution is 8.12 g/L, the gallium recovery rate reaches 82.69%, the total concentration of other ions in the electrolyzed solution is basically unchanged, and the total power consumption is 11249kWh/t.
As can be seen from the comparative example, the current efficiency of the gallium recovery by adopting the pulse rotational flow enhanced electrolysis process is far higher than that by adopting the traditional flat plate electrolysis process and higher than that of the single use of the pulse electrolysis or rotational flow electrolysis process, and the high-efficiency clean recovery of the metal is realized.
In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The foregoing description is only a preferred embodiment of the invention, which can be embodied in many different forms than described herein, and therefore the invention is not limited to the specific embodiments disclosed above. And that those skilled in the art may, using the methods and techniques disclosed above, make numerous possible variations and modifications to the disclosed embodiments, or modify equivalents thereof, without departing from the scope of the claimed embodiments. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.
Claims (10)
1. A pulse rotational flow strengthening metal electrolysis device is characterized by comprising a cylindrical electrolysis bath, wherein the electrolysis bath is provided with an upper end cover and a lower end cover, an anode rod is arranged at the center of the electrolysis bath, the anode rod penetrates through the upper end cover to be connected with the anode of a pulse power supply, the inner wall of the electrolysis bath is pasted with a cathode sheet, and the cathode sheet is connected with the cathode of the pulse power supply; the bottom of electrolysis trough is provided with the feed inlet, and the top is provided with the discharge gate, feed inlet and liquid storage pot intercommunication, electrolyte process in the liquid storage pot the feed inlet flows in with tangential direction from bottom to top in the electrolysis trough, electrolyte is in spiral rise in the electrolysis trough with the negative pole piece with the contact of anode rod takes place electrolytic reaction, the metal is in the surface of negative pole piece is appeared.
2. The metal electrolysis device according to claim 1, wherein the electrolyte after the electrolysis reaction flows out of the discharge port and flows back to the liquid storage tank again through a pipeline, and a circulation passage is formed between the electrolysis cell and the liquid storage tank.
3. The metal electrolysis apparatus according to claim 1, wherein a receiving groove for receiving the released metal is formed in the lower end cap.
4. The metal electrolysis device according to claim 1, wherein the reservoir is disposed within the heater, and the reservoir houses a thermocouple and a thermometer.
5. The metal electrolysis device according to claim 1, further comprising a flow meter and a circulation pump, wherein the circulation pump is connected with the flow meter and the feed inlet in sequence through a pipeline.
6. The metal electrolysis device according to claim 1, wherein the electrolysis cell is sealed by the upper end cap and the lower end cap.
7. The metal electrolysis device according to claim 1, wherein the cathode sheet is a stainless steel or titanium cathode sheet.
8. The metal electrolysis device according to claim 1, wherein the anode rod is a titanium anode having an oxide coating.
9. The metal electrolysis device according to claim 1, wherein the pulsed power supply duty cycle is continuously adjustable.
10. The metal electrolysis device according to claim 5, wherein the circulation pump is a magnetic circulation pump.
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| CN117779121A (en) * | 2024-02-26 | 2024-03-29 | 成都中核高通同位素股份有限公司 | Dynamic electrolytic separation and purification device and system |
| CN117779121B (en) * | 2024-02-26 | 2024-05-17 | 成都中核高通同位素股份有限公司 | Dynamic electrolytic separation and purification device and system |
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