CN109609974A - Conducive to the method for reducing Zinc electrolysis tank voltage and energy consumption - Google Patents
Conducive to the method for reducing Zinc electrolysis tank voltage and energy consumption Download PDFInfo
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- CN109609974A CN109609974A CN201910086315.5A CN201910086315A CN109609974A CN 109609974 A CN109609974 A CN 109609974A CN 201910086315 A CN201910086315 A CN 201910086315A CN 109609974 A CN109609974 A CN 109609974A
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- zinc
- energy consumption
- urea
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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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- 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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Abstract
The present invention relates to a kind of conducive to the method for reducing Zinc electrolysis tank voltage and energy consumption, including electrolytic cell, the electrolytic cell includes groove body, anode and cathode, is added urea as additive in Zinc electrolysis electrolyte, groove body is added after being sufficiently mixed uniformly, then leads to direct current progress electrodeposition and takes zinc；Addition concentration range of the urea in Zinc electrolysis electrolyte is 0.01~0.8mol/L.The present invention haves no need to change the other parameters and condition during existing Zinc electrolysis, the urea of reasonable concentration is only added as additive, realize being greatly lowered for Zinc electrolysis anodic current potential, zinc is not influenced in the deposition of cathode simultaneously, to realize being greatly reduced for electrolytic deposition process energy consumption, implementation cost is low, energy consumption is reduced obvious and easily realized, is convenient for industrial application.
Description
Technical field
The invention belongs to Extraction metallurgy technical fields, and in particular to a kind of conducive to the side for reducing Zinc electrolysis tank voltage and energy consumption
Method.
Background technique
In the general smelting process of metallic zinc, final step needs to obtain cathode zinc by the method for electrochemical reduction, claims
For Zinc electrolysis, generally using lead-containing alloy plate as anode during Zinc electrolysis, aluminium sheet is as cathode, sulfuric acid-solution of zinc sulfate
System as basic electrolyte system, while in electrolyte also containing other additive ions such as manganese, fluorine, chlorine or magazine from
Son.During Zinc electrolysis, since the deposition potential of hydrogen is relatively negative thus zinc ion obtains electron reduction Cheng Jin at cathode
Belong to zinc and invests on aluminium sheet, and on anode, then the evolution reaction of oxygen occurs, since oxygen evolution reaction needs are very high excessively electric
Pressure, therefore in general, total tank voltage of Zinc electrolysis is up to 3.3V or more, ton electrolytic zinc consumes direct current energy 2900-3100 degree
Electricity.Zinc electrolysis process consumes a large amount of high-quality electric energy, and how research, which reduces the tank voltage of the process and then reduce power consumption, has
Significance.
In order to reduce the tank voltage and energy consumption of Zinc electrolysis process, the method that industry generallys use is to improve anode material to reduce
Anodic overpotential improves the overpotential for oxygen evolution etc. of lead-containing alloy for example, by using DSA anode, addition alloying element.However, these sides
Formula still have invest excessive, the unconspicuous problem of effect so that so far in the research and industrial application of Zinc electrolysis process into
It postpones slow.
Summary of the invention
For the above-mentioned deficiency of the prior art, it is conducive to reduce Zinc electrolysis the technical problem to be solved in the present invention is to provide one kind
The method of tank voltage and energy consumption avoids existing Zinc electrolysis production process tank voltage and the high problem of energy consumption, obtain improving cost it is low,
Energy consumption reduces the effect obviously, easily realized in order to industrial application.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
Conducive to the method for reducing Zinc electrolysis tank voltage and energy consumption, including electrolytic cell, the electrolytic cell include groove body, anode and yin
Pole is added urea as additive in Zinc electrolysis electrolyte, and groove body is added after being sufficiently mixed uniformly, then leads to direct current and carries out
Electrodeposition takes zinc.
Further improve above-mentioned technical proposal, addition concentration range of the urea in Zinc electrolysis electrolyte be 0.01~
0.8mol/L。
Further, with the circulation of electrolyte in electrolytic deposition process, continuous uniform supplement addition urea simultaneously makes its concentration model
It encloses and remains 0.01~0.8mol/L.
Further, electrolytic deposition process continues 24~48h.
Further, the Zinc electrolysis electrolyte is the mixed solution for including sulfuric acid and zinc sulfate.
Compared with prior art, the invention has the following beneficial effects:
The present invention proposes a kind of to utilize urea as the new of additive for the double high problems of Zinc electrolysis process tank voltage and energy consumption
Electrodeposition system and method, pass through the path for changing anode reaction to obtain the tank voltage and energy more much lower than existing Zinc electrolysis
It consumes, in electrolytic deposition process, the gas that anode is precipitated is the mixed gas of carbon dioxide, nitrogen and oxygen, goes out slot after 24~48h of electrodeposition
Acceptable cathodic zinc and electrolysis waste solution containing urea are obtained, electrolytic deposition process can reduce 100mV relative to anode potential when being not added with urea
More than, energy consumption reduces 100kWh or more.When carrying out Zinc electrolysis production using this method, during having no need to change existing Zinc electrolysis
Other parameters and condition, only be added reasonable concentration urea be used as additive, that is, realize Zinc electrolysis anodic current potential
Be greatly lowered, while zinc is not influenced in the deposition of cathode, to realize being greatly reduced for electrolytic deposition process energy consumption, implementation cost
Low, energy consumption is reduced obvious and is easily realized, is convenient for industrial application.
Specific embodiment
The present invention is described in further detail With reference to embodiment.
The method for being conducive to reduce Zinc electrolysis tank voltage and energy consumption of specific embodiment, varies without the other ginsengs of Zinc electrolysis process
Several and condition need to only be added urea as additive in Zinc electrolysis electrolyte, and Zinc electrolysis electrolyte is with sulfuric acid and zinc sulfate
Based on mixed solution；Electrolytic cell is added after carrying out being sufficiently mixed outside electrolytic cell uniformly, the addition of urea in the electrolytic solution is dense
Degree range is 0.01~0.8mol/L, and logical direct current carries out electrodeposition and takes zinc, and continuous with the circulation of electrolyte in electrolytic deposition process
Addition is supplemented outside uniform slot to keep the concentration of urea basicly stable；In electrolytic deposition process, anode be precipitated gas be carbon dioxide,
The mixed gas of nitrogen and oxygen goes out slot after 24~48h of electrodeposition and obtains acceptable cathodic zinc and electrolyte containing urea, electrolytic deposition process phase
Anode potential can reduce 100mV or more when for being not added with urea, and energy consumption reduces 100kWh or more.
Embodiment one:
The raw material of the electrowinning zinc process of embodiment one be containing the leachate that Zn is 60g/L, sulfur acid is 150g/L, by urea with
The concentration calculation of 0.05mol/L and the additive amount for weighing urea, the urea weighed, which is uniformly added in leachate, makes it
Urea concentration reaches 0.05mol/L, and uniformly adding urea in holding electrolytic deposition process electrolyte circulation maintains the concentration of its urea
In 0.05mol/L or so.Use pure stereotype as anode, for aluminium sheet as cathode, the gas that anode is precipitated is carbon dioxide, nitrogen
With the mixed gas of oxygen, the electrolysis that is powered goes out slot afterwards for 24 hours, obtains uniform cathode zinc metal sheet and urea-containing waste electrolyte.
The yield of cathode zinc is identical (not changing substantially), but the tank voltage of electrolytic process is relative to the electricity for being not added with urea
Bath voltage reduces 117mV, and energy consumption reduces 107kWh.
Embodiment two:
The raw material of the electrowinning zinc process of embodiment two be containing the leachate that Zn is 50g/L, sulfur acid is 160g/L, by urea with
The concentration calculation of 0.3mol/L and the additive amount for weighing urea, the urea weighed, which is uniformly added in leachate, makes its urine
Plain concentration reaches 0.3mol/L, and uniformly adding urea in holding electrolytic deposition process electrolyte circulation maintains the concentration of its urea
0.3mol/L or so.Use the stereotype of argentiferous 0.8% as anode, for aluminium sheet as cathode, the gas that anode is precipitated is titanium dioxide
The mixed gas of carbon, nitrogen and oxygen, be powered after electrolysis 48h slot out, obtains uniform cathode zinc metal sheet and urea-containing useless electrolysis
Liquid.
The yield of cathode zinc is identical, and the tank voltage of electrolytic process is reduced relative to the bath voltage for being not added with urea
152mV, energy consumption reduce 141kWh.
Embodiment three:
The raw material of the electrowinning zinc process of embodiment three be containing the leachate that Zn is 55g/L, sulfur acid is 155g/L, by urea with
The concentration calculation of 0.8mol/L and the additive amount for weighing urea, the urea weighed, which is uniformly added in leachate, makes its urine
Plain concentration reaches 0.8mol/L, and uniformly adding urea in holding electrolytic deposition process electrolyte circulation maintains the concentration of its urea
0.8mol/L or so.The gas for using the titanium plate plate of surface plating ruthenic oxide to be precipitated as DSA anode, aluminium sheet as cathode, anode
Body is the mixed gas of carbon dioxide, nitrogen and oxygen, goes out slot after the electrolysis 36h that is powered, and obtains cathode zinc metal sheet and urea-containing useless
Electrolyte.
The yield of cathode zinc is identical, and the tank voltage of electrolytic process is reduced relative to the bath voltage for being not added with urea
201mV, energy consumption reduce 187kWh.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (5)
1. the method for being conducive to reduce Zinc electrolysis tank voltage and energy consumption, including electrolytic cell, the electrolytic cell include groove body, anode and yin
Pole, it is characterised in that: be added urea as additive in Zinc electrolysis electrolyte, groove body be added after being sufficiently mixed uniformly, then
Logical direct current carries out electrodeposition and takes zinc.
2. the method for being conducive to reduce Zinc electrolysis tank voltage and energy consumption according to claim 1, it is characterised in that: urea is in zinc electricity
Addition concentration range in product electrolyte is 0.01~0.8mol/L.
3. the method for being conducive to reduce Zinc electrolysis tank voltage and energy consumption according to claim 2, it is characterised in that: in electrolytic deposition process
In with electrolyte circulation, continuous uniform supplement addition urea simultaneously so that its concentration range is remained 0.01~0.8mol/L.
4. the method for being conducive to reduce Zinc electrolysis tank voltage and energy consumption according to claim 1, it is characterised in that: electrolytic deposition process is held
Continuous 24~48h.
5. the method for being conducive to reduce Zinc electrolysis tank voltage and energy consumption according to claim 1 described in -4 any one, it is characterised in that: institute
Stating Zinc electrolysis electrolyte is the mixed solution for including sulfuric acid and zinc sulfate.
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| CN201910086315.5A CN109609974A (en) | 2019-01-29 | 2019-01-29 | Conducive to the method for reducing Zinc electrolysis tank voltage and energy consumption |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110747490A (en) * | 2019-11-21 | 2020-02-04 | 株洲冶炼集团股份有限公司 | Zinc electrodeposition method |
| CN114808042A (en) * | 2022-06-07 | 2022-07-29 | 赵坤 | Cation membrane continuous electrolysis device and use method thereof |
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| CN101935848A (en) * | 2010-10-04 | 2011-01-05 | 普宁市长欣五金有限公司 | Method for electrolyzing and separating tin-covered copper wire |
| CN102321907A (en) * | 2011-06-23 | 2012-01-18 | 兰州理工大学 | Preparation method of composite film on surface of steel and solution formula for preparation method |
| CN103639420A (en) * | 2013-11-27 | 2014-03-19 | 昆明理工大学 | Method for utilizing low co-fusion type ionic liquid electro-deposition to manufacture nanometer copper powder |
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| CN101935848A (en) * | 2010-10-04 | 2011-01-05 | 普宁市长欣五金有限公司 | Method for electrolyzing and separating tin-covered copper wire |
| CN102321907A (en) * | 2011-06-23 | 2012-01-18 | 兰州理工大学 | Preparation method of composite film on surface of steel and solution formula for preparation method |
| CN104955987A (en) * | 2012-07-26 | 2015-09-30 | 俄亥俄州立大学 | Selective reductive electrowinning apparatus and methods |
| CN103639420A (en) * | 2013-11-27 | 2014-03-19 | 昆明理工大学 | Method for utilizing low co-fusion type ionic liquid electro-deposition to manufacture nanometer copper powder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110747490A (en) * | 2019-11-21 | 2020-02-04 | 株洲冶炼集团股份有限公司 | Zinc electrodeposition method |
| CN110747490B (en) * | 2019-11-21 | 2021-11-19 | 株洲冶炼集团股份有限公司 | Zinc electrodeposition method |
| CN114808042A (en) * | 2022-06-07 | 2022-07-29 | 赵坤 | Cation membrane continuous electrolysis device and use method thereof |
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