CN108754374A - A kind of zinc-plated online deferrization process using hydrogen peroxide and limewash - Google Patents
A kind of zinc-plated online deferrization process using hydrogen peroxide and limewash Download PDFInfo
- Publication number
- CN108754374A CN108754374A CN201810864213.7A CN201810864213A CN108754374A CN 108754374 A CN108754374 A CN 108754374A CN 201810864213 A CN201810864213 A CN 201810864213A CN 108754374 A CN108754374 A CN 108754374A
- Authority
- CN
- China
- Prior art keywords
- zinc
- hydrogen peroxide
- limewash
- fluxing agent
- mixed solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The present invention provides a kind of zinc-plated online deferrization process using hydrogen peroxide and limewash, include the following steps：The solution that the fluxing agent for impregnating the steel pipe to come from diluted acid pond forms in except iron pipe conduit with hydrogen peroxide and limewash be sufficiently mixed reacting, obtains mixed solution A；Mixed solution A after reaction is passed directly into fluxing agent surge tank, Fe (OH) is made in fluxing agent surge tank3Precipitation forms the mixed solution B with flocculent deposit；Mixed solution B in fluxing agent surge tank is subjected to press filtration, removal Fe (OH)3, the return of filtered solution is helped into coating bath, use can be continued cycling through.The present invention improves the utilization rate of zinc, due to being the totally enclosed processing system in pipeline, reduces the volatilization of potassium chlorate and ammonium hydroxide, it is greatly improved in the utilization rate of medicament, the thermal loss for reducing fluxing agent, reduces the discharge of waste, saves a large amount of costs of material.
Description
Technical field
The invention belongs to hot dip galvanizing process fields, are removed online using hydrogen peroxide and the zinc-plated of limewash more particularly, to a kind of
Iron process.
Background technology
Galvanizing due to it in terms of Treatment of Metal Surface plating thickness, beauty, strong corrosion resistance the advantages that be metal watch
The more satisfactory means of surface treatment.It plates in zinc gray containing zinc, zinc oxide, zinc chloride, iron chloride and a small amount of ammonium chloride etc., can be used as
The secondary resource of zinc is recycled.Currently, recycling valuable metal generally uses wet processing from plating zinc gray.It is soaked from plating zinc gray
Going out zinc has hot water leaching, neutral leaching and hot acid to leach.When hot water leaching, the hydrotrope plated in zinc gray is completely dissolved, zinc chloride
It is transformed into zinc hydroxide to enter in slag, iron chloride and a small amount of ammonium chloride enter solution.The terminal PH that neutrality leaches is about 5 to 6
Between, free acid, iron-holder are relatively fewer in solution.And also containing a large amount of free acids after hot acid leaches, in solution, iron enters molten
The amount of liquid is relatively more, and supernatant returns to neutral leach needs removal impurity iron before, if cannot be in time Impurities In Solvents spy
It is not that ferrous ion removes oar, prodigious economic loss is caused to enterprise.So the research of solvent on-line regeneration technology is with application
Galvanizing industry is badly in need of the technical barrier solved.
Invention content
In view of this, the present invention is directed to propose a kind of zinc-plated online deferrization process using hydrogen peroxide and limewash, for a long time
It keeps frerrous chloride content in fluxing agent slot to remove iron speed hereinafter, increasing in 1g/l, reduces zinc soil and zinc in hot galvanizing process
Cost of material is saved in the generation of slag.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of zinc-plated pre-treating technology of steel pipe includes sour processing procedure, two-stage dilute hydrochloric acid cleaning process and molten from front to back
Agent processing procedure, sour processing procedure, which includes eo-acid pond, old sour pond and spent acid pond, eo-acid pond, the injection of concentrated hydrochloric acid；The dilute salt of two-stage
Sour cleaning process includes two-stage dilute hydrochloric acid pond；Solvent processing procedure includes helping coating bath and online deferrization process, online deferrization process
By the ferrous ions helped in coating bath, precipitates and prepare ferroso-ferric oxide.
Using the zinc-plated online deferrization process of hydrogen peroxide and limewash, include the following steps：
Step 1：The solution that the fluxing agent for impregnating steel pipe forms in except iron pipe conduit with hydrogen peroxide and limewash is carried out
It is sufficiently mixed reaction, obtains mixed solution A；
Step 2：Mixed solution A after reaction is passed directly into fluxing agent surge tank, makes Fe in fluxing agent surge tank
(OH)3Precipitation forms the mixed solution B with flocculent deposit；
Step 3：Mixed solution B in fluxing agent surge tank is subjected to press filtration, removal Fe (OH)3, will be filtered molten
Liquid return helps coating bath, can continue cycling through use.
Further, 190g/l zinc chloride and 150g/l calcium chloride are contained in fluxing agent.
Further, the molar ratio of hydrogen peroxide and calcium hydroxide is 1-2 in the solution of hydrogen peroxide and limewash composition:1-
1.3。
Further, the reaction temperature of step 1 is 55-70 DEG C.
Further, the PH in step 1 is controlled in 4-6.
Compared with the existing technology, it is of the present invention using the zinc-plated online deferrization process of hydrogen peroxide and limewash have with
Lower advantage：
Zinc-plated online deferrization process of the present invention using hydrogen peroxide and limewash improves the utilization rate of zinc, by
Then the totally enclosed processing system in pipeline, reduces the volatilization of hydrogen peroxide, the relatively original facture of falling slot and reaction
The online reaction method in pond, is greatly improved in the utilization rate of medicament, and iron removal quickly, effectively, reduces fluxing agent
Thermal loss reduces the discharge of waste, has significant Social benefit and economic benefit, in addition, hydrotropy can be kept for a long time
In agent slot frerrous chloride content in 1g/l hereinafter, keep fluxing agent it is limpid, reduce the production of zinc soil and cadmia in hot galvanizing process
It is raw, save a large amount of costs of material.
Specific implementation mode
In addition to being defined, technical term used in following embodiment has universal with those skilled in the art of the invention
The identical meanings of understanding.Test reagent used in following embodiment is unless otherwise specified conventional biochemical reagent；It is described
Experimental method is unless otherwise specified conventional method.
With reference to embodiment, the present invention will be described in detail.
Embodiment I
With the fluxing agent of 55 DEG C of immersions steel pipe in removing iron pipe conduit with molar ratio be 1：1.1 hydrogen peroxide and hydrogen-oxygen
Change the solution that calcium is formed to be sufficiently mixed, mixed process is automatically controlled by PLC, and entire reaction is completed in the duct.Then
By fluxing agent surge tank, Fe (OH) is made in fluxing agent surge tank3Precipitation is united at flocculent deposit.Then pass through height
Press pump is driven into filtration system, removal Fe (OH)3.Limpid fluxing agent up to standard return helps coating bath after filtering, the Fe being press-filtered out
(OH)3Precipitation makes red soil.
Embodiment II
With the fluxing agent of 60 DEG C of immersions steel pipe in removing iron pipe conduit with molar ratio be 1:1.3 hydrogen peroxide and hydrogen-oxygen
Change the solution that calcium is formed to be sufficiently mixed, mixed process is automatically controlled by PLC, and entire reaction is completed in the duct.Then
By fluxing agent surge tank, Fe (OH) is made in fluxing agent surge tank3Precipitation is united at flocculent deposit.Then pass through height
Press pump is driven into filtration system, removal Fe (OH)3.Limpid fluxing agent up to standard return helps coating bath after filtering, the Fe being press-filtered out
(OH)3Precipitation makes red soil.
Embodiment III
With the fluxing agent of 65 DEG C of immersions steel pipe in removing iron pipe conduit with molar ratio be 1.1：1.2 hydrogen peroxide and hydrogen
The solution that calcium oxide is formed is sufficiently mixed, and mixed process is automatically controlled by PLC, and entire reaction is completed in the duct.So
Afterwards by fluxing agent surge tank, Fe (OH) is made in fluxing agent surge tank3Precipitation is united at flocculent deposit.Then pass through
High-pressure pump is driven into filtration system, removal Fe (OH)3.Limpid fluxing agent up to standard return helps coating bath after filtering, the Fe being press-filtered out
(OH)3Precipitation makes red soil.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (5)
1. a kind of zinc-plated online deferrization process using hydrogen peroxide and limewash, it is characterised in that：Include the following steps：
Step 1：To impregnate the fluxing agent of the steel pipe to come from diluted acid pond in except iron pipe conduit with hydrogen peroxide and limewash group
At solution carry out being sufficiently mixed reaction, obtain mixed solution A；
Step 2：Mixed solution A after reaction is passed directly into fluxing agent surge tank, Fe (OH) is made in fluxing agent surge tank3It is heavy
Precipitation goes out, and forms the mixed solution B with flocculent deposit；
Step 3：Mixed solution B in fluxing agent surge tank is subjected to press filtration, removal Fe (OH)3, filtered solution is returned
It returns and helps coating bath, use can be continued cycling through.
2. the zinc-plated online deferrization process according to claim 1 using hydrogen peroxide and limewash, it is characterised in that：Help plating
Contain 190g/l zinc chloride and 150g/l calcium chloride in agent.
3. the zinc-plated online deferrization process according to claim 1 using hydrogen peroxide and limewash, it is characterised in that：Dioxygen
The molar ratio of hydrogen peroxide and calcium hydroxide is 1-2 in the solution of water and limewash composition:1-1.3.
4. the zinc-plated online deferrization process according to claim 1 using hydrogen peroxide and limewash, it is characterised in that：Step
One reaction temperature is 55-70 DEG C.
5. the zinc-plated online deferrization process according to claim 1 using hydrogen peroxide and limewash, it is characterised in that：Step
PH in one is controlled in 4-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810864213.7A CN108754374A (en) | 2018-08-01 | 2018-08-01 | A kind of zinc-plated online deferrization process using hydrogen peroxide and limewash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810864213.7A CN108754374A (en) | 2018-08-01 | 2018-08-01 | A kind of zinc-plated online deferrization process using hydrogen peroxide and limewash |
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| Publication Number | Publication Date |
|---|---|
| CN108754374A true CN108754374A (en) | 2018-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810864213.7A Pending CN108754374A (en) | 2018-08-01 | 2018-08-01 | A kind of zinc-plated online deferrization process using hydrogen peroxide and limewash |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111333206A (en) * | 2020-03-31 | 2020-06-26 | 江苏华电铁塔制造有限公司 | Zinc-containing waste acid solution treatment method and treatment system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974834A (en) * | 2006-12-01 | 2007-06-06 | 华南理工大学 | Comprehensive plating promoter treatment process and apparatus for hot galvanizing production line |
| CN101144143A (en) * | 2007-10-26 | 2008-03-19 | 陈冬 | Processing technique of plating auxiliary agent for hot galvanizing |
| CN103361590A (en) * | 2012-04-05 | 2013-10-23 | 云南东电线路器材有限公司 | Hot-dip galvanizing process |
| CN104004983A (en) * | 2014-05-12 | 2014-08-27 | 领新(南通)重工有限公司 | Method for comprehensive treatment of ferrous ions in hot galvanizing assistant liquid |
| CN106745151A (en) * | 2016-12-19 | 2017-05-31 | 唐山市斯瑞尔化工有限公司 | Waste acid containing the zinc comprehensive treatment utilization method high |
-
2018
- 2018-08-01 CN CN201810864213.7A patent/CN108754374A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974834A (en) * | 2006-12-01 | 2007-06-06 | 华南理工大学 | Comprehensive plating promoter treatment process and apparatus for hot galvanizing production line |
| CN101144143A (en) * | 2007-10-26 | 2008-03-19 | 陈冬 | Processing technique of plating auxiliary agent for hot galvanizing |
| CN103361590A (en) * | 2012-04-05 | 2013-10-23 | 云南东电线路器材有限公司 | Hot-dip galvanizing process |
| CN104004983A (en) * | 2014-05-12 | 2014-08-27 | 领新(南通)重工有限公司 | Method for comprehensive treatment of ferrous ions in hot galvanizing assistant liquid |
| CN106745151A (en) * | 2016-12-19 | 2017-05-31 | 唐山市斯瑞尔化工有限公司 | Waste acid containing the zinc comprehensive treatment utilization method high |
Non-Patent Citations (1)
| Title |
|---|
| 杨冰等: "连续清除热镀锌助镀剂中铁离子的工艺技术", 《电镀与涂饰》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111333206A (en) * | 2020-03-31 | 2020-06-26 | 江苏华电铁塔制造有限公司 | Zinc-containing waste acid solution treatment method and treatment system |
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Application publication date: 20181106 |
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