CN116043274B - Application of combined additive in defogging of electrodeposited zinc - Google Patents
Application of combined additive in defogging of electrodeposited zinc Download PDFInfo
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- CN116043274B CN116043274B CN202310095489.4A CN202310095489A CN116043274B CN 116043274 B CN116043274 B CN 116043274B CN 202310095489 A CN202310095489 A CN 202310095489A CN 116043274 B CN116043274 B CN 116043274B
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 39
- 239000011701 zinc Substances 0.000 title claims abstract description 39
- 239000000654 additive Substances 0.000 title abstract description 11
- 230000000996 additive effect Effects 0.000 title abstract description 10
- 101100006584 Mus musculus Clnk gene Proteins 0.000 claims abstract description 74
- 239000003595 mist Substances 0.000 claims abstract description 74
- 239000002253 acid Substances 0.000 claims abstract description 67
- 239000003112 inhibitor Substances 0.000 claims abstract description 38
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 claims abstract description 31
- 239000001397 quillaja saponaria molina bark Substances 0.000 claims abstract description 29
- 229930182490 saponin Natural products 0.000 claims abstract description 29
- 150000007949 saponins Chemical class 0.000 claims abstract description 29
- 239000003792 electrolyte Substances 0.000 claims abstract description 28
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims description 16
- 108010010803 Gelatin Proteins 0.000 claims description 9
- 239000002202 Polyethylene glycol Substances 0.000 claims description 9
- 229920000159 gelatin Polymers 0.000 claims description 9
- 239000008273 gelatin Substances 0.000 claims description 9
- 235000019322 gelatine Nutrition 0.000 claims description 9
- 235000011852 gelatine desserts Nutrition 0.000 claims description 9
- 229920001223 polyethylene glycol Polymers 0.000 claims description 9
- 230000008030 elimination Effects 0.000 claims 2
- 238000003379 elimination reaction Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 239000001301 oxygen Substances 0.000 abstract description 4
- 229910052760 oxygen Inorganic materials 0.000 abstract description 4
- 238000003723 Smelting Methods 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 230000036541 health Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 21
- 238000005265 energy consumption Methods 0.000 description 15
- 239000011248 coating agent Substances 0.000 description 12
- 238000000576 coating method Methods 0.000 description 12
- 238000004070 electrodeposition Methods 0.000 description 11
- 238000003760 magnetic stirring Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000005363 electrowinning Methods 0.000 description 5
- 238000001878 scanning electron micrograph Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- -1 ethoxy pentafluoroethyl cyclotriphosphazene Chemical compound 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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 provides an application of a combined additive in defogging in electrodeposited zinc, and relates to the technical field of acid mist inhibitors in metal smelting. The acid mist inhibitor comprises, by mass, 12-20 parts of sodium lignin sulfonate, 4-10 parts of saponin and 2-8 parts of fluoroethylene carbonate. By adding the combined additive (acid mist inhibitor) into the electrolyte, the surface tension of the electrolyte can be reduced, on one hand, the oxygen separated out from the anode smoothly passes through the liquid level, and the acid is prevented from being brought into a production site; on the other hand, the generated bubbles are finer, micro cracks are rapidly generated on the surface of the bubbles in the transferring process, and the splashing degree of the bubbles when the bubbles are broken is reduced, so that the technical effect of reducing the concentration of acid mist in the environment is achieved. The combined additive (acid mist inhibitor) can reduce the concentration of acid mist in the environment to be below the national standard (1.2 mg/m 3), and effectively reduce the corrosion of the acid mist to equipment and the influence of the acid mist to the health of workers.
Description
Technical Field
The invention relates to the technical field of acid mist inhibitors in metal smelting, in particular to application of a combined additive in defogging of electrodeposited zinc.
Background
Electrodeposition is an electrochemical process that is widely used to extract and refine metals such as zinc, copper, and the like from solutions. In most cases, the solution is acidic, oxidation of the anodic water molecules results in release of oxygen bubbles and cathodic release of hydrogen gas, a common reaction, the generation of oxygen bubbles usually requiring a high overpotential, a significant percentage of energy consumption in the metal electrowinning pot. In addition, the generated bubbles break at the air/solution interface, producing highly acidic droplets, where fine droplets are generated in the air and form acid mist in the tank room of the whole electro-winning plant. The acid mist has strong corrosiveness and can corrode a cathode plate, an anode suspender, storage tank equipment and a building structure. Acid mist also causes serious health hazards and extreme discomfort to the skin, eyes and respiratory system of the investigator. Therefore, it is necessary to reduce acid mist in the electrodeposition process.
There have been many attempts to eliminate or reduce acid mist in zinc, copper, etc. electrowinning operations, such as acoustic coalescing, WFGD systems with double scrubbers, superimposed polymer microsphere matrices, and acid mist inhibitors. Among these methods, the acid mist inhibitor is the most effective method for inhibiting acid mist. The traditional acid mist inhibitor can reduce the current efficiency while reducing the acid mist in the electrodeposition process, has negative influence on the deposited zinc coating, has higher cost and has quite unsatisfactory effect. Therefore, the research and development of a combined additive (acid mist inhibitor) which can not reduce the current efficiency, but also form a compact zinc coating and inhibit acid mist is a problem to be solved in the electrodeposition process.
Disclosure of Invention
Based on the foregoing, the present invention provides for the use of a combination additive for defogging in electrodeposited zinc.
In order to achieve the above object, the present invention provides the following solutions:
According to one of the technical schemes, the acid mist inhibitor comprises, by mass, 12-20 parts of sodium lignin sulfonate, 4-10 parts of saponin and 2-8 parts of fluoroethylene carbonate.
Further, the raw materials comprise 1001-5 parts of polyethylene glycol, 12-20 parts of sodium lignin sulfonate, 4-10 parts of saponin, 2-8 parts of fluoroethylene carbonate and 10-30 parts of gelatin according to parts by weight.
Further, the raw materials comprise 1002-4 parts by weight of polyethylene glycol, 14-16 parts by weight of sodium lignin sulfonate, 6-8 parts by weight of saponin, 4-6 parts by weight of fluoroethylene carbonate and 12-15 parts by weight of gelatin.
In a second technical scheme of the invention, the acid mist inhibitor is applied to defogging of electrodeposited zinc, and the electrolyte contains the acid mist inhibitor.
Further, the concentration of the acid mist inhibitor in the electrolyte is 18-73mg/L.
According to the third technical scheme, the acid mist inhibitor is added into the electrolyte in the method for reducing the acid mist concentration in the zinc electrowinning process.
Further, the concentration of the acid mist inhibitor in the electrolyte is 18-73mg/L.
The invention discloses the following technical effects:
by adding the combined additive (acid mist inhibitor) into the electrolyte, the surface tension of the electrolyte can be reduced, on one hand, the oxygen separated out from the anode smoothly passes through the liquid level, and the acid is prevented from being brought into a production site; on the other hand, the generated bubbles are finer, micro cracks are rapidly generated on the surface of the bubbles in the transferring process, and the splashing degree of the bubbles when the bubbles are broken is reduced, so that the technical effect of reducing the concentration of acid mist in the environment is achieved.
The combined additive (acid mist inhibitor) can reduce the concentration of acid mist in the environment to be below the national standard (1.2 mg/m 3), and effectively reduce the corrosion of the acid mist to equipment and the influence of the acid mist to the health of workers.
The invention has the advantages of simple and easily obtained raw materials, low cost and obvious effect of inhibiting acid mist, and is expected to be widely popularized and used.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an SEM image of a zinc coating layer prepared in example 1;
FIG. 2 is an SEM image of the zinc plating layer prepared in comparative example 2;
fig. 3 is an SEM image of the zinc plating layer prepared in comparative example 3.
Detailed Description
Various exemplary embodiments of the invention will now be described in detail, which should not be considered as limiting the invention, but rather as more detailed descriptions of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In addition, for numerical ranges in this disclosure, it is understood that each intermediate value between the upper and lower limits of the ranges is also specifically disclosed. Every smaller range between any stated value or stated range, and any other stated value or intermediate value within the stated range, is also encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the invention described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from consideration of the specification of the present invention. The specification and examples of the present invention are exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.
The invention provides an acid mist inhibitor, which comprises, by mass, 12-20 parts of sodium lignin sulfonate, 4-10 parts of saponin and 2-8 parts of fluoroethylene carbonate.
In a preferred embodiment of the present invention, the raw material of the acid mist inhibitor is composed of 14 parts by mass of sodium lignin sulfonate, 5 parts by mass of saponin and 2.5 parts by mass of fluoroethylene carbonate.
The invention also provides application of the acid mist inhibitor in defogging of electrodeposited zinc, and the electrolyte contains the acid mist inhibitor.
In the invention, the concentration of the acid mist inhibitor in the electrolyte is 18-24mg/L. Specifically, the concentration of sodium lignin sulfonate in the electrolyte is 12-15mg/L, the concentration of saponin is 4-6mg/L, and the concentration of fluoroethylene carbonate is 2-3mg/L.
The sodium lignin sulfonate can reduce the surface tension of the electrolyte, and when the concentration of the sodium lignin sulfonate is not more than 10mg/L, the sodium lignin sulfonate has no obvious influence on the current efficiency and the energy consumption, and when the concentration of the sodium lignin sulfonate exceeds 10mg/L, the current efficiency is reduced, and the energy consumption is increased.
The saponin can reduce the surface tension of the electrolyte, and the simple saponin can reduce the current efficiency to a certain extent and increase the energy consumption when being added into the electrolyte.
However, the invention is discovered through repeated experimental exploration, when the concentration of the saponin and the concentration of the sodium lignin sulfonate are compounded, the current efficiency can be improved, the energy consumption can be reduced, and the effect of reducing the surface tension of the electrolyte can be enhanced. On the basis of the compounding of the saponin and the sodium lignin sulfonate, fluoroethylene carbonate is used as an auxiliary material, so that the compactness of the zinc coating can be improved, the zinc coating is smoother and denser, and no small holes exist. The fluoroethylene carbonate is replaced by fluorine-containing additives commonly used in the field, such as tri (2, 2-trifluoroethyl) phosphate or ethoxy pentafluoroethyl cyclotriphosphazene, so that the smoothness and compactness of the zinc coating are not obviously improved.
In the invention, the raw materials of the acid mist inhibitor can also consist of 1001-5 parts of polyethylene glycol, 12-20 parts of sodium lignin sulfonate, 4-10 parts of saponin, 2-8 parts of fluoroethylene carbonate and 10-30 parts of gelatin according to parts by weight.
In the invention, the raw materials of the acid mist inhibitor comprise 1002-4 parts of polyethylene glycol, 14-16 parts of sodium lignin sulfonate, 6-8 parts of saponin, 4-6 parts of fluoroethylene carbonate and 12-15 parts of gelatin according to parts by weight.
The gelatin is added on the basis of 14-16 parts of sodium lignin sulfonate, 6-8 parts of saponin and 4-6 parts of fluoroethylene carbonate as acid mist inhibitor, so that the grain size can be further reduced, the grain arrangement is more uniform, and the tank voltage can be reduced by adding polyethylene glycol.
The invention also provides a method for reducing the concentration of acid mist in the zinc electrowinning process, and the acid mist inhibitor is added into the electrolyte.
In the invention, the concentration of the acid mist inhibitor in the electrolyte is 18-24mg/L.
The raw materials used in the invention are available from a purchasing route unless otherwise specified.
The current efficiency and the energy consumption in the examples and comparative examples of the present invention were calculated by the following formulas:
Current efficiency (E):
Energy consumption (W):
Wherein m is the mass (unit: g) of zinc actually precipitated on the cathode; i is current (unit: A); t is the power-on time (unit: h); q is the equivalent of the influence of the acid mist inhibitor on the electrodeposited zinc of the sulfate system [ 1.1960 g/(A.h) ]; u is the tank voltage (unit: V). The current efficiency and the energy consumption calculation mode are conventional technical means in the field and are not used as the key points of patent protection of the invention, and are not repeated here.
Example 1
Acid mist inhibitor: the raw materials comprise 14 parts by weight of sodium lignin sulfonate, 5 parts by weight of saponin and 2.5 parts by weight of fluoroethylene carbonate.
And (3) an electro-deposition zinc process: the electrolyte comprises the following components: zn 2+ g/L, concentrated sulfuric acid 150g/L, sodium lignin sulfonate 14mg/L, saponin 5mg/L and fluoroethylene carbonate 2.5mg/L; the technological conditions are that the polar distance is 3.0cm, the temperature is 38+/-2 ℃, the magnetic stirring speed is 300r/min, and the time is 6h.
In the embodiment, the current efficiency is as high as 99.02%, the energy consumption is as low as 2500.9 kW.h/t, and the highest value of the concentration of the sulfuric acid mist outside the perimeter is 0.8mg/m 3; the obtained zinc coating has flat, compact and pinhole-free surface, and the SEM image is shown in figure 1.
Example 2
Acid mist inhibitor: the raw materials comprise 13.5 parts by weight of sodium lignin sulfonate, 4.5 parts by weight of saponin and 2 parts by weight of fluoroethylene carbonate.
And (3) an electro-deposition zinc process: the electrolyte comprises the following components: zn 2+ g/L, concentrated sulfuric acid 150g/L, sodium lignin sulfonate 13.5mg/L, saponin 4.5mg/L and fluoroethylene carbonate 2mg/L; the technological conditions are that the polar distance is 3.0cm, the temperature is 38+/-2 ℃, the magnetic stirring speed is 300r/min, and the time is 6h.
In the embodiment, the current efficiency is as high as 96.71%, the energy consumption is as low as 2560.6 kW.h/t, and the highest value of the concentration of the sulfuric acid mist outside the perimeter is 1.1mg/m 3; the obtained zinc coating has flat and compact surface and no pinholes on the surface.
Example 3
Acid mist inhibitor: the raw materials comprise 15 parts by weight of sodium lignin sulfonate, 5.4 parts by weight of saponin and 3 parts by weight of fluoroethylene carbonate.
And (3) an electro-deposition zinc process: the electrolyte comprises the following components: zn 2+ g/L, concentrated sulfuric acid 150g/L, sodium lignin sulfonate 15mg/L, saponin 5.4mg/L and fluoroethylene carbonate 3mg/L; the technological conditions are that the polar distance is 3.0cm, the temperature is 38+/-2 ℃, the magnetic stirring speed is 300r/min, and the time is 6h.
In the embodiment, the current efficiency is as high as 98.86%, the energy consumption is as low as 2505.0 kW.h/t, and the maximum value of the concentration of the sulfuric acid mist outside the perimeter is 0.9mg/m 3; the obtained zinc coating has flat and compact surface and no pinholes.
Example 4
Acid mist inhibitor: the raw materials comprise 1003 parts of polyethylene glycol, 15 parts of sodium lignin sulfonate, 7 parts of saponin, 5 parts of fluoroethylene carbonate and 13 parts of gelatin according to parts by weight.
And (3) an electro-deposition zinc process: the electrolyte comprises the following components: zn 2+ g/L, concentrated sulfuric acid 150g/L, polyethylene glycol 1003mg/L, sodium lignin sulfonate 15mg/L, saponin 7mg/L, fluoroethylene carbonate 5mg/L and gelatin 13mg/L; the technological conditions are that the polar distance is 3.0cm, the temperature is 38+/-2 ℃, the magnetic stirring speed is 300r/min, and the time is 6h.
In the embodiment, the current efficiency is as high as 99.37%, the energy consumption is as low as 2492.1 kW.h/t, and the highest value of the concentration of the sulfuric acid mist outside the perimeter is 0.6mg/m 3; the obtained zinc coating has flat and compact surface and no pinholes.
Comparative example 1
Acid mist inhibitor: the raw materials comprise 5 parts by weight of saponin and 2.5 parts by weight of fluoroethylene carbonate.
And (3) an electro-deposition zinc process: the electrolyte comprises the following components: zn 2+ g/L, concentrated sulfuric acid 150g/L, saponin 5mg/L and fluoroethylene carbonate 2.5mg/L; the technological conditions are that the polar distance is 3.0cm, the temperature is 38+/-2 ℃, the magnetic stirring speed is 300r/min, and the time is 6h.
In the embodiment, the current efficiency is 81.25%, the energy consumption is 3047.9 kW.h/t, and the highest value of the concentration of the sulfuric acid mist outside the periphery is 1.5mg/m 3; the obtained zinc coating has smooth surface and small holes.
Comparative example 2
Acid mist inhibitor: the raw materials comprise 14 parts by weight of sodium lignin sulfonate and 2.5 parts by weight of fluoroethylene carbonate.
And (3) an electro-deposition zinc process: the electrolyte comprises the following components: zn 2+ g/L, concentrated sulfuric acid 150g/L, sodium lignin sulfonate 14mg/L and fluoroethylene carbonate 2.5mg/L; the technological conditions are that the polar distance is 3.0cm, the temperature is 38+/-2 ℃, the magnetic stirring speed is 300r/min, and the time is 6h.
In the embodiment, the current efficiency is 93.71%, the energy consumption is 2642.6 kW.h/t, and the maximum value of the concentration of the sulfuric acid mist outside the periphery is 4.2mg/m 3; the surface of the obtained zinc coating is relatively flat, and has a tendency of forming holes, and an SEM (scanning electron microscope) chart is shown in figure 2.
Comparative example 3
Acid mist inhibitor: the raw materials comprise 14 parts by weight of sodium lignin sulfonate and 5 parts by weight of saponin.
And (3) an electro-deposition zinc process: the electrolyte comprises the following components: zn 2+ g/L, concentrated sulfuric acid 150g/L, sodium lignin sulfonate 14mg/L and saponin 5mg/L; the technological conditions are that the polar distance is 3.0cm, the temperature is 38+/-2 ℃, the magnetic stirring speed is 300r/min, and the time is 6h.
In the embodiment, the current efficiency is 95.93%, the energy consumption is 2581.5 kW.h/t, and the highest value of the concentration of the sulfuric acid mist outside the periphery is 1.3mg/m 3; the surface of the obtained zinc coating is rough, small holes exist, and an SEM image is shown in figure 3.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (7)
1. The acid mist inhibitor is characterized by comprising, by mass, 12-20 parts of sodium lignin sulfonate, 4-10 parts of saponin and 2-8 parts of fluoroethylene carbonate.
2. The acid mist suppressant according to claim 1, wherein the raw materials consist of 1001-5 parts by mass of polyethylene glycol, 12-20 parts by mass of sodium lignin sulfonate, 4-10 parts by mass of saponin, 2-8 parts by mass of fluoroethylene carbonate and 10-30 parts by mass of gelatin.
3. The acid mist inhibitor according to claim 1, wherein the raw materials consist of 1002-4 parts by mass of polyethylene glycol, 14-16 parts by mass of sodium lignin sulfonate, 6-8 parts by mass of saponin, 4-6 parts by mass of fluoroethylene carbonate and 12-15 parts by mass of gelatin.
4. Use of an acid mist suppressant according to claim 1 for mist elimination in electrodeposited zinc, characterized in that the acid mist suppressant according to claim 1 is contained in the electrolyte.
5. Use of an acid mist suppressant according to claim 4 for mist elimination in electrodeposited zinc, characterized in that the concentration of the acid mist suppressant in the electrolyte is 18-73mg/L.
6. A method of reducing the concentration of acid mist in an electrodeposited zinc process, characterized in that the acid mist inhibitor of claim 1 is added to an electrolyte.
7. The method for reducing the concentration of acid mist in an electrodeposited zinc process according to claim 6, wherein the concentration of the acid mist suppressant in the electrolyte is 18-73mg/L.
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|---|---|---|---|---|
| GB1327303A (en) * | 1971-03-23 | 1973-08-22 | Cruickshanks Ltd M T | Acidic zinc electroplating bath |
| RU2095477C1 (en) * | 1995-07-19 | 1997-11-10 | Акционерное общество "Челябинский электролитный цинковый завод" | Method of preventing formation of sulfuric acid mist |
| RU2133301C1 (en) * | 1998-03-16 | 1999-07-20 | Акционерное общество открытого типа "Челябинский электролитный цинковый завод" | Method of preventing formation of sulfuric 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 |
| CN104862737A (en) * | 2015-04-21 | 2015-08-26 | 郎溪县鑫科金属科技有限公司 | Copper electrolyte addition agent loaded with nanocarbon and preparation method of addition agent |
| CN111321433A (en) * | 2020-02-25 | 2020-06-23 | 光山白鲨针布有限公司 | Electroplating solution for chromium-based card clothing |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6833479B2 (en) * | 2002-08-16 | 2004-12-21 | Cognis Corporation | Antimisting agents |
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