CN110863214A - Zinc electrodeposition method without acid mist generation - Google Patents
Zinc electrodeposition method without acid mist generation Download PDFInfo
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- CN110863214A CN110863214A CN201911293163.2A CN201911293163A CN110863214A CN 110863214 A CN110863214 A CN 110863214A CN 201911293163 A CN201911293163 A CN 201911293163A CN 110863214 A CN110863214 A CN 110863214A
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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
- C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
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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
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
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Abstract
The invention discloses an electrodeposition method of zinc without acid mist generation. The method of the invention comprises the following steps: deoiling the qualified zinc stripping solution, and conveying the deoiled zinc stripping solution to an electrolytic bath through a peristaltic pump; weighing a proper amount of bone glue to prepare a bone glue solution, and adding the bone glue solution serving as an additive into an electrolytic cell through an adding pump in the electrolytic process; putting the anode plate into an electrolytic bath, turning on a direct-current power supply, a circulating pump and an additive adding pump, and finally putting the anode plate into the cathode plate to adjust to proper electrodeposition parameters to start electrodeposition of zinc; and taking out the cathode plate after a period of time, and performing hot-washing and plate stripping to obtain the zinc plate. The invention effectively solves the problem of acid mist generated in the electrodeposition process; the anode does not produce anode mud in the electrodeposition process, the work of cleaning the electrolytic cell regularly is reduced, the operation is simple, and the equipment utilization rate and the capacity are improved.
Description
Technical Field
The invention belongs to the technical field of electrochemistry, and particularly relates to a method for generating zinc electrodeposition without acid mist.
Background
The traditional Zn electrodeposition is basically carried out in a sulfate system, when current passes through an electrolytic solution in the zinc electrodeposition process, a zinc ion deposition process occurs at a cathode, and oxygen is separated out at an anode. The electrochemical reaction of the zinc electrodeposition process is as follows:
and (3) cathode reaction: zn2++2e-＝Zn，
And (3) anode reaction: h2O-2e-＝2H++1/2O2，
The total reaction is as follows: zn2++H2O＝Zn+1/2O2+2H+。
Most of the oxygen forms bubbles on the anode surface and adsorbs a small amount of acid and water to overflow the electrolytic cell to form an acid mist. Acid mist causes corrosion of equipment on the one hand and environmental pollution on the other hand. Therefore, under the condition that the environmental protection requirement is more and more strict, the zinc electrodeposition method without acid mist generation is urgently searched.
Disclosure of Invention
Based on the problem of acid mist generated by the traditional hydrometallurgy zinc electrodeposition, the invention provides a zinc electrodeposition method without acid mist generation, which is used for effectively solving the problem of acid mist generated in the electrodeposition process.
In order to achieve the purpose, the invention adopts the following technical scheme: a method of electrodepositing zinc without acid mist generation comprising the steps of:
A. conveying qualified zinc stripping solution into an electrolytic tank (from the liquid level to the level of an overflow port) through a peristaltic pump after oil removal;
B. weighing a proper amount of bone glue to prepare a bone glue solution, and adding the bone glue solution serving as an additive into an electrolytic cell through an adding pump in the electrolytic process;
C. putting the anode plate into an electrolytic bath, turning on a direct-current power supply, a circulating pump and an additive adding pump, and finally putting the anode plate into the cathode plate to adjust to proper electrodeposition parameters to start electrodeposition of zinc;
D. and after the zinc electrodeposition is finished, taking out the cathode plate, and performing ironing washing and stripping to obtain the zinc plate.
The whole process of the invention does not generate irritant acid mist.
As a supplement to the method, in the step A, Muse 501160-180 g/L and zinc content 100-130 g/L are contained in the zinc stripping solution.
As a supplement of the method, in the step A, Cu in the zinc back extraction solution is less than or equal to 1mg/L, Cd and less than or equal to 0.05mg/L, Fe and less than or equal to 5mg/L, Co and less than or equal to 0.05mg/L, Ni and less than or equal to 0.05mg/L, Pb and less than or equal to 1mg/L, Sn and less than or equal to 0.01mg/L, Sb and less than or equal to 0.01mg/L, As and less than or equal to 0.01 mg/L.
In addition to the above process, in step A, the zinc strip liquor oil content entering the electrolytic cell is less than 1 ppm.
As a supplement to the method, in the step B, the addition amount of the bone glue is 300-1000 g/t Zn.
In addition to the above method, in step C, the current density of the electrodeposition parameter is 100-1000A/m2。
In addition to the above method, in the step C, the temperature of the electrodeposition parameter is 35-50 ℃.
As a supplement to the method, in the step C, the circulation amount of the electrolyte with electrodeposition parameters is 20-100L/h.
As a supplement to the method, in the step C, the electrode distance of the electrodeposition parameter is 40-100 mm.
In addition to the above method, in step C, the electrolytic anode plate is made of titanium-based lead dioxide, and the electrolytic cathode plate is made of aluminum plate.
The invention has the beneficial effects that:
1. the method for electrodepositing zinc under the Muse501 system avoids the generation of acid mist and reduces the problems of environmental pollution and equipment corrosion.
2. The Muse501 can be recycled by combining the extraction process, so that the production cost is reduced.
3. The anode does not generate anode mud in the electrodeposition process, so that the work of cleaning the electrolytic cell regularly is reduced, and the equipment utilization rate and the production efficiency are improved.
4. The invention has high electric efficiency and simple operation, and is convenient for industrial production.
Detailed Description
The invention relates to an electrodeposition method of zinc without acid mist generation, which comprises the following specific steps:
1) and conveying the zinc strip liquor containing Muse 501160-180 g/L and 100-130 g/L of zinc to an electrolytic tank (from the liquid level to the level of an overflow port) through an addition pump.
2) Preparing bone glue solution, adding the bone glue solution into an electrolytic cell through an additive adding pump in the electrolytic process, wherein the adding amount of the bone glue is 300-1000 g/t Zn.
3) Put into titanium baseAnd (3) turning on a direct-current power supply, a circulating pump and an additive adding pump to start zinc electrodeposition. Electrodeposition parameters: the current density is 100 to 1000A/m2The temperature is 35-50 ℃, the circulation volume of the electrolyte is 20-100L/h, and the polar distance is 40-100 mm.
4) Conveying the electrodeposition barren solution to an extraction section by a pump, taking out the cathode aluminum plate after zinc electrodeposition to obtain a zinc plate, weighing the mass of the zinc plate, calculating the electric efficiency and the energy consumption, and detecting the zinc content and impurity components by the obtained zinc plate.
The present invention is further illustrated by the following specific examples.
Example 1
1. 200L of Muse501 and Muse501 Zn mixed solution containing Muse 501160-180 g/L and 100-130 g/L of zinc is prepared in an electrolytic bath and a circulating bath.
2. Heating the electrolytic cell to 35-50 ℃ by using a heating rod before electrifying, circulating the electrolyte by a pump, selecting a titanium-based lead dioxide anode plate as an anode and a cathode aluminum plate as a cathode, selecting the cell voltage of 3.2-5.5V and the current density of 100-1000A/m2The solution circulation amount is 20-100L/h, and the polar distance is 40-100 mm.
3. In the electrodeposition process, the bone glue solution is added into the electrolytic bath through an additive adding pump, and the adding amount is 300-1000 g/t Zn.
The temperature of the electrolyte can not exceed 50 ℃, the reaction lasts for 10 hours, and no irritant acid mist is generated on site.
4. And after the reaction is finished, taking out the cathode aluminum plate to obtain a zinc plate, weighing the mass of the zinc plate, calculating the electric efficiency and the energy consumption, and detecting the zinc content and impurity components by using the obtained zinc plate.
Experimental data for example 1:
example 2
1. 200L of Muse501 and Muse501 Zn mixed solution containing Muse 501180 g/L and zinc content of 120g/L is prepared in an electrolytic bath and a circulating bath.
2. Heating the electrolytic cell to 40 deg.C with a heating rod before electrifyingThe electrolyte is pumped and circulated by an adding pump, a titanium-based lead dioxide anode plate is adopted as an anode, a cathode aluminum plate is adopted as a cathode, the bath pressure is selected to be 4.2V, and the current density is 400A/m2The temperature is 40 ℃, the circulation volume of the solution is 70L/h, and the distance between the positive pole and the negative pole is 90 mm.
3. During the electrodeposition, the bone glue solution was added to the electrolytic bath by an additive addition pump in an amount of 600 g/tZn. The temperature of the electrolyte can not exceed 50 ℃, the reaction lasts for 10 hours, and no irritant acid mist is generated on site.
4. And after the reaction is finished, taking out the cathode aluminum plate to obtain a zinc plate, weighing the mass of the zinc plate, calculating the electric efficiency and the energy consumption, and detecting the zinc content and impurity components by using the obtained zinc plate.
Experimental data for example 2:
example 3
1. 200L of Muse501 and Muse501 Zn mixed solution containing Muse 501180 g/L and zinc content of 120g/L is prepared in an electrolytic bath and a circulating bath.
2. Heating the electrolytic cell to 40 deg.C with heating rod before electrifying, circulating the electrolyte with pump, adopting titanium-based lead dioxide anode plate as anode, cathode aluminum plate as cathode, selecting cell voltage of 4.6V, and current density of 800A/m2The temperature is 40 ℃, the circulation volume of the solution is 70L/h, and the distance between the positive pole and the negative pole is 90 mm.
3. During the electrodeposition, the bone glue solution was added to the electrolytic bath by an additive addition pump in an amount of 600 g/tZn. The temperature of the electrolyte can not exceed 50 ℃, the reaction lasts for 10 hours, and no irritant acid mist is generated on site.
4. And after the reaction is finished, taking out the cathode aluminum plate to obtain a zinc plate, weighing the mass of the zinc plate, calculating the electric efficiency and the energy consumption, and detecting the zinc content and impurity components by using the obtained zinc plate.
Experimental data for example 3:
example 4
1. 200L of Muse501 and Muse501 Zn mixed solution containing Muse 501160 g/L and zinc content of 120g/L is prepared in an electrolytic bath and a circulating bath.
2. Heating the electrolytic cell to 40 deg.C with heating rod before electrifying, circulating the electrolyte with pump, adopting titanium-based lead dioxide anode plate as anode, cathode aluminum plate as cathode, selecting cell voltage of 4.6V, and current density of 800A/m2The temperature is 40 ℃, the circulation volume of the solution is 70L/h, and the distance between the positive pole and the negative pole is 90 mm.
3. During the electrodeposition, the bone glue solution was added to the electrolytic bath by an additive addition pump in an amount of 600 g/tZn. The temperature of the electrolyte can not exceed 50 ℃, the reaction lasts for 10 hours, and no irritant acid mist is generated on site.
4. And after the reaction is finished, taking out the cathode aluminum plate to obtain a zinc plate, weighing the mass of the zinc plate, calculating the electric efficiency and the energy consumption, and detecting the zinc content and impurity components by using the obtained zinc plate.
Experimental data for example 4:
example 5
1. 200L of Muse501 and Muse501 Zn mixed solution containing Muse 501180 g/L and zinc content of 110g/L is prepared in an electrolytic bath and a circulating bath.
2. Heating the electrolytic cell to 40 deg.C with heating rod before electrifying, circulating the electrolyte with pump, adopting titanium-based lead dioxide anode plate as anode, cathode aluminum plate as cathode, selecting cell voltage of 4.6V, and current density of 800A/m2The temperature is 40 ℃, the circulation volume of the solution is 70L/h, and the distance between the positive pole and the negative pole is 90 mm.
3. During the electrodeposition, the bone glue solution was added to the electrolytic bath by an additive addition pump in an amount of 600 g/tZn. The temperature of the electrolyte can not exceed 50 ℃, the reaction lasts for 10 hours, and no irritant acid mist is generated on site.
4. And after the reaction is finished, taking out the cathode aluminum plate to obtain a zinc plate, weighing the mass of the zinc plate, calculating the electric efficiency and the energy consumption, and detecting the zinc content and impurity components by using the obtained zinc plate.
Experimental data for this example 5:
the invention solves the problem that acid mist is generated by zinc electrodeposition in the traditional acidic system, thereby not only reducing environmental pollution, avoiding equipment corrosion, reducing enterprise production cost, but also improving field operation environment; muse501 in the electrodeposition process of the extraction system can be recycled, so that the production cost is saved; the anode does not produce anode mud in the electrodeposition process, the work of cleaning the electrolytic cell regularly is reduced, the operation is simple, and the equipment utilization rate and the capacity are improved.
Claims (10)
1. A zinc electrodeposition method without acid mist generation is characterized by comprising the following steps:
A. deoiling the qualified zinc stripping solution, and conveying the deoiled zinc stripping solution to an electrolytic bath through a peristaltic pump;
B. weighing a proper amount of bone glue to prepare a bone glue solution, and adding the bone glue solution serving as an additive into an electrolytic cell through an adding pump in the electrolytic process;
C. putting the anode plate into an electrolytic bath, turning on a direct-current power supply, a circulating pump and an additive adding pump, and finally putting the anode plate into the cathode plate to adjust to proper electrodeposition parameters to start electrodeposition of zinc;
D. and after the zinc electrodeposition is finished, taking out the cathode plate, and performing ironing washing and stripping to obtain the zinc plate.
2. The method of claim 1, wherein in step A, the zinc stripping solution contains Muse 501160-180 g/L and 100-130 g/L zinc.
3. The method of claim 1, wherein in step A, Cu in the zinc strip solution is less than or equal to 1mg/L, Cd and less than or equal to 0.05mg/L, Fe and less than or equal to 5mg/L, Co and less than or equal to 0.05mg/L, Ni and less than or equal to 0.05mg/L, Pb and less than or equal to 1mg/L, Sn and less than or equal to 0.01mg/L, Sb and less than or equal to 0.01mg/L, As and less than or equal to 0.01 mg/L.
4. The method of claim 1, wherein the oil content of the zinc strip solution fed into the electrolytic bath in step A is less than 1 ppm.
5. The method of claim 1, wherein in step B, the amount of bone glue added is 300-1000 g/t Zn.
6. The method of claim 1, wherein in step C, the electrodeposition parameter current density is 100-1000A/m2。
7. The method of claim 1, wherein the electrodeposition temperature parameter in step C is 35-50 ℃.
8. The method of claim 1, wherein the electrodeposition parameter in step C is 20-100L/h of electrolyte circulation.
9. The method of claim 1, wherein in step C, the electrode spacing of electrodeposition parameters is 40-100 mm.
10. The method of claim 1, wherein in step C, the anode plate is made of titanium-based lead dioxide and the cathode plate is made of aluminum plate.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115074782A (en) * | 2022-05-11 | 2022-09-20 | 昆明理工大学 | Preparation method of foamed zinc |
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| CN104532294A (en) * | 2015-02-01 | 2015-04-22 | 天津格林泰克环保科技有限公司 | Electrolytic zinc acid mist inhibiting agent |
| CN108251864A (en) * | 2018-01-16 | 2018-07-06 | 昆明理工大学 | A kind of Zinc electrolysis additive and its application method |
| CN110512236A (en) * | 2019-09-27 | 2019-11-29 | 中国科学院长春应用化学研究所 | A kind of combined additive and its application in electrowinning zinc |
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2019
- 2019-12-16 CN CN201911293163.2A patent/CN110863214A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200995135Y (en) * | 2006-12-09 | 2007-12-26 | 赵金松 | Zinc electrolyzer against acid fog |
| CN102787239A (en) * | 2011-05-20 | 2012-11-21 | 鹰潭市精鹰铜业有限公司 | Technology for separating Cu-Pb-Zn-containing soot by alkali method |
| CN102618890A (en) * | 2012-04-24 | 2012-08-01 | 天华化工机械及自动化研究设计院 | Electrolytic tank cover for preventing and controlling acid mist |
| CN104532294A (en) * | 2015-02-01 | 2015-04-22 | 天津格林泰克环保科技有限公司 | Electrolytic zinc acid mist inhibiting agent |
| CN108251864A (en) * | 2018-01-16 | 2018-07-06 | 昆明理工大学 | A kind of Zinc electrolysis additive and its application method |
| CN110512236A (en) * | 2019-09-27 | 2019-11-29 | 中国科学院长春应用化学研究所 | A kind of combined additive and its application in electrowinning zinc |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115074782A (en) * | 2022-05-11 | 2022-09-20 | 昆明理工大学 | Preparation method of foamed zinc |
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