CN111270265A - Method and device for purifying electrodeposited cobalt solution - Google Patents
Method and device for purifying electrodeposited cobalt solution Download PDFInfo
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- CN111270265A CN111270265A CN201811471312.5A CN201811471312A CN111270265A CN 111270265 A CN111270265 A CN 111270265A CN 201811471312 A CN201811471312 A CN 201811471312A CN 111270265 A CN111270265 A CN 111270265A
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- cobalt solution
- electrodeposited cobalt
- electrodeposited
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- copper
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- 229910017052 cobalt Inorganic materials 0.000 title claims abstract description 76
- 239000010941 cobalt Substances 0.000 title claims abstract description 76
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000003756 stirring Methods 0.000 claims abstract description 54
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052802 copper Inorganic materials 0.000 claims abstract description 36
- 239000010949 copper Substances 0.000 claims abstract description 36
- 238000004070 electrodeposition Methods 0.000 claims abstract description 21
- 239000012535 impurity Substances 0.000 claims abstract description 17
- 238000000746 purification Methods 0.000 claims abstract description 15
- 239000002659 electrodeposit Substances 0.000 claims abstract description 6
- 238000013019 agitation Methods 0.000 claims description 10
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 abstract description 10
- 229910001431 copper ion Inorganic materials 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 4
- 238000001556 precipitation Methods 0.000 abstract description 4
- 229910052979 sodium sulfide Inorganic materials 0.000 abstract description 4
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000007796 conventional method Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- -1 sulfur ions Chemical class 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 210000001331 nose Anatomy 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/12—Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/06—Electrolytic production, recovery or refining of metals by electrolysis of solutions or iron group metals, refractory metals or manganese
- C25C1/08—Electrolytic production, recovery or refining of metals by electrolysis of solutions or iron group metals, refractory metals or manganese of nickel or cobalt
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/02—Electrodes; Connections thereof
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/06—Operating or servicing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention discloses a purification method of an electrodeposited cobalt solution, which comprises the following steps: placing the electrodeposited cobalt solution and the cathode plate in a stirring tank, controlling the voltage and current density of the stirring tank, and stirring the electrodeposited cobalt solution to electrodeposit impurity copper in the electrodeposited cobalt solution; the invention also discloses a purification device for the electrodeposited cobalt solution; the method abandons the conventional method for removing copper by using sodium sulfide precipitation, adopts a cathode plate with a larger area, firstly electrodeposits copper ions according to different voltages required by copper and cobalt electrodeposition, removes impurity copper in an electrodeposited cobalt solution by the method, has obvious removal effect, does not introduce other impurities in the process, and has the advantages of simple use method, low cost and easy popularization.
Description
Technical Field
The invention belongs to the technical field of wet metallurgy, and particularly relates to a method and a device for purifying an electrodeposited cobalt solution.
Background
In hydrometallurgy, the requirement on the content of copper ions in a cobalt chloride electrolyte during electrodeposition is very low, and the copper ion content must be controlled below 0.001g/L, while in a production environment, the content of materials containing copper is more: for example, copper wires, copper noses and the like are easy to pollute the electrolyte, so that the copper ions in the electrolyte exceed the standard.
When the copper ions exceed the standard, the existing treatment methods are two, the first method is to waste the electro-deposition liquid, so the waste cost is very high, the second method is to use a sodium sulfide precipitation method to remove copper, but the copper can bring in sulfur ions, and then the sulfur ions are oxidized into sulfate ions, the electro-deposition liquid is cobalt chloride, and is a hydrochloric acid system, and if other anions exist in the system, the quality of the electro-deposition cobalt is greatly influenced, so the two methods have disadvantages.
Disclosure of Invention
The invention aims to provide a purification method of an electrodeposited cobalt solution, which can remove copper in the electrodeposited cobalt solution without introducing other impurities, is simple and solves the problem of the quality reduction of the electrodeposited cobalt solution caused by introducing other ions in the prior art.
Another object of the present invention is to provide a purification apparatus for electrodeposited cobalt solution.
The technical scheme adopted by the invention is that,
a method for purifying an electrodeposited cobalt solution comprises the following steps: and placing the electrodeposited cobalt solution and the cathode plate in a stirring tank, controlling the voltage and current density of the stirring tank, and stirring the electrodeposited cobalt solution to electrodeposit impurity copper in the electrodeposited cobalt solution.
The present invention is also characterized in that,
the area of the cathode plate is the same as the area of the inner surface of the stirring tank.
The voltage of the stirring tank is controlled to be between 2.4 and 2.5V.
The current of the stirring tank is controlled to be 0.5-1A/m2In the meantime.
The stirring speed of the stirring electrodeposition cobalt solution is not less than 118-120 rpm.
The utility model provides a purification device for electrodeposition cobalt solution, its includes stirred tank, stirring rod, anode bar, negative plate and motor, the one end of stirring rod and the output shaft of motor, the other end stretches into in the stirred tank, the anode bar sets up two and all is located the stirred tank, the negative plate covers in the internal surface of stirred tank.
And a solution outlet and a solution inlet are formed in the side surface of the stirring tank.
The area of the cathode plate is the same as the inner surface area of the stirring tank, so that the cathode plate covers the inner surface of the stirring tank.
The tail end of the stirring rod is provided with a stirring head which is of a symmetrical arc structure.
The method has the advantages that the conventional method for removing copper by using sodium sulfide precipitation is abandoned, the cathode plate with a large area is adopted, copper ions are electrodeposited according to different voltages required by copper and cobalt electrodeposition, impurity copper in the electrodeposited cobalt solution is removed by the method, the removal effect is obvious, other impurities cannot be introduced in the process, and the method is simple to use, low in cost and easy to popularize.
Drawings
FIG. 1 is a schematic structural diagram of a purification apparatus for an electrodeposited cobalt solution according to an embodiment of the present invention;
FIG. 2 is a bottom view of a purification apparatus for electrodeposited cobalt solution according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a method for purifying an electrodeposited cobalt solution, which comprises the following steps: placing the electrodeposited cobalt solution and the cathode plate in a stirring tank, and controlling the voltage of the stirring tank to be 2.4-2.5V and the current density to be 0.5-1A/m2Stirring the electrodeposited cobalt solution at the speed of not less than 118-120rpm to electrodeposit impurity copper in the electrodeposited cobalt solution;
thus, by the above method, since the voltage of cobalt electrodeposition is between 3.0 and 3.5V and the voltage of copper electrodeposition is only between 1.8 and 2.5V in the hydrochloric acid system, which are greatly different from each other, the removal of copper in the electrodeposited cobalt solution can be achieved by first electrodepositing copper ions without cobalt electrodeposition by using the bottom tank voltage method.
The area of the cathode plate is the same as that of the inner surface of the stirring tank, so that concentration polarization is eliminated to the maximum extent by adopting the cathode plate with an ultra-large area, and the copper ion concentration can be electrodeposited to be below 0.001 g/L.
Example 1
The embodiment 1 of the invention provides a purification method of an electrodeposited cobalt solution, which comprises the following specific steps: placing the electrodeposited cobalt solution and the cathode plate in a stirring tank, and controlling the voltage of the stirring tank to be 2.4V and the current density to be 0.5A/m2The electrodeposited cobalt solution was stirred at a speed of 120rpm so that copper impurity in the electrodeposited cobalt solution was electrodeposited.
The detection proves that the copper removal depth of the embodiment is reduced from 0.005g/L to 0.0008 g/L.
Example 2
The embodiment 2 of the invention provides a purification method of an electrodeposited cobalt solution, which comprises the following specific steps: placing the electrodeposited cobalt solution and the cathode plate in a stirring tank, and controlling the voltage of the stirring tank to be 2.5V and the current density to be 1A/m2The electrodeposited cobalt solution was stirred at a speed of 150rpm so that copper as an impurity in the electrodeposited cobalt solution was electrodeposited.
The detection proves that the copper removal depth of the embodiment is reduced from 0.0084g/L to 0.0007 g/L.
Example 3
The embodiment 3 of the invention provides a purification method of an electrodeposited cobalt solution, which comprises the following specific steps: placing the electrodeposited cobalt solution and the cathode plate in a stirring tank, and controlling the voltage of the stirring tank to be 2.45V and the current density to be 0.8A/m2The electrodeposited cobalt solution was stirred at a speed of 125rpm so that copper impurity in the electrodeposited cobalt solution was electrodeposited.
The detection proves that the copper removal depth of the embodiment is reduced from 0.0071g/L to 0.0003 g/L.
Example 4
The detection proves that the copper removal depth of the embodiment is reduced from 0.011g/L to 0.0009 g/L.
Example 5
The detection proves that the copper removal depth of the copper in the embodiment is reduced from 0.009g/L to 0.0005 g/L.
Example 6
Embodiment 6 of the present invention provides a method for purifying an electrodeposited cobalt solution, which specifically comprises: placing the electrodeposited cobalt solution and the cathode plate in a stirring tank, and controlling the voltage of the stirring tank to be 2.41V and the current density to be 0.7A/m2The electrodeposited cobalt solution was stirred at a speed of 140rpm so that copper impurity in the electrodeposited cobalt solution was electrodeposited.
The detection proves that the copper removal depth of the embodiment is reduced from 0.015g/L to 0.0009 g/L.
The method abandons the conventional method of removing copper by using sodium sulfide precipitation, adopts a cathode plate with a larger area, firstly electrodeposits copper ions according to the difference of voltages required by copper and cobalt electrodeposition, removes impurity copper in the electrodeposited cobalt solution by the method, has obvious removal effect, does not introduce other impurities in the process, and has simple use method and low cost.
The embodiment of the invention also provides a purification device for the electrodeposited cobalt solution, which comprises a stirring tank 1, a stirring rod 2, two anode rods 3, a cathode plate 4 and a motor 5, wherein one end of the stirring rod 2 is connected with an output shaft of the motor 5, the other end of the stirring rod extends into the stirring tank 1, the two anode rods 3 are arranged and are both positioned in the stirring tank 1, and the cathode plate 4 covers the inner surface of the stirring tank 1;
like this, adopt above-mentioned structure, motor 5 drives stirring rod 2 and stirs the electrodeposition cobalt solution in stirred tank 1, and voltage and current density in the control stirred tank 1 are under the effect of positive pole stick 3 and negative plate 4, and copper in the electrodeposition cobalt solution is by the electrodeposition, accomplishes the purification of electrodeposition cobalt solution.
The side surface of the stirring tank 1 is provided with a solution outlet 11 and a solution inlet 12.
The area of the cathode plate 4 is equal to the inner surface area of the agitation tank 1, so that the cathode plate 4 covers the inner surface of the agitation tank 1, and the cathode plate 4 having an ultra-large area is adopted, and the area of the cathode plate 4 is considered to be equal to the inner wall area of the agitation tank 1, so that concentration polarization can be eliminated to the maximum extent, and the copper ion concentration is electrodeposited to be less than 0.001 g/L.
The tail end of the stirring rod 2 is provided with a stirring head which is of a symmetrical arc structure.
Further, by using the agitation tank 1 as an electrodeposition tank and agitating the electrodeposition liquid at high speed, concentration polarization can be eliminated to the maximum extent.
This embodiment has accomplished the electrodeposition of copper through setting up super large area's negative plate in the stirred tank, voltage and current density in the control stirred tank simultaneously, has realized the purification of electrodeposition cobalt solution.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A method for purifying an electrodeposited cobalt solution is characterized by comprising the following steps: and placing the electrodeposited cobalt solution and the cathode plate in a stirring tank, controlling the voltage and current density of the stirring tank, and stirring the electrodeposited cobalt solution to electrodeposit impurity copper in the electrodeposited cobalt solution.
2. The method for purifying an electrodeposited cobalt solution as claimed in claim 1, wherein the area of the cathode plate is the same as the area of the inner surface of the agitation tank.
3. The method for purifying the electrodeposited cobalt solution as claimed in claim 2, wherein the voltage of the agitation tank is controlled to be 2.4 to 2.5V.
4. The method for purifying an electrodeposited cobalt solution as claimed in claim 3, wherein the current of the agitation tank is controlled to be 0.5 to 1A/m2In the meantime.
5. The method for purifying an electrodeposited cobalt solution as claimed in any one of claims 1 to 4, wherein the stirring speed of the stirred electrodeposited cobalt solution is not less than 118-120 rpm.
6. The utility model provides a purification device for electrodeposition cobalt solution, its characterized in that, it includes stirred tank (1), stirring rod (2), anode rod (3), negative plate (4) and motor (5), the one end of stirring rod (2) and the output shaft of motor (5), the other end stretches into in stirred tank (1), anode rod (3) set up two and all are located stirred tank (1), negative plate (4) cover in the internal surface of stirred tank (1).
7. The purifying apparatus for the electrodeposited cobalt solution as claimed in claim 6, wherein the side of the agitation tank (1) is opened with a solution outlet (11) and a solution inlet (12).
8. A purification apparatus for an electrodeposited cobalt solution according to claim 7, characterized in that the area of said cathode plate (4) and the inner surface area of the agitation tank (1) are the same size so that the cathode plate (4) covers the inner surface of the agitation tank (1).
9. The purifying apparatus for the electrodeposited cobalt solution as claimed in claim 8, wherein the stirring rod (2) is terminated with a stirring head having a symmetrical arc structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811471312.5A CN111270265A (en) | 2018-12-04 | 2018-12-04 | Method and device for purifying electrodeposited cobalt solution |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811471312.5A CN111270265A (en) | 2018-12-04 | 2018-12-04 | Method and device for purifying electrodeposited cobalt solution |
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| CN111270265A true CN111270265A (en) | 2020-06-12 |
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| CN201811471312.5A Pending CN111270265A (en) | 2018-12-04 | 2018-12-04 | Method and device for purifying electrodeposited cobalt solution |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089023A (en) * | 2021-03-22 | 2021-07-09 | 浙江中金格派锂电产业股份有限公司 | Method and device for purifying electrodeposited cobalt solution |
| CN113215622A (en) * | 2021-03-23 | 2021-08-06 | 台州屹泽金属制品有限公司 | Device and method for purifying nickel and copper |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113215622A (en) * | 2021-03-23 | 2021-08-06 | 台州屹泽金属制品有限公司 | Device and method for purifying nickel and copper |
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Application publication date: 20200612 |