CN106149016A - The removal technique of sodium carbonate in a kind of alkaline zinc plating liquid - Google Patents
The removal technique of sodium carbonate in a kind of alkaline zinc plating liquid Download PDFInfo
- Publication number
- CN106149016A CN106149016A CN201610521448.7A CN201610521448A CN106149016A CN 106149016 A CN106149016 A CN 106149016A CN 201610521448 A CN201610521448 A CN 201610521448A CN 106149016 A CN106149016 A CN 106149016A
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- Prior art keywords
- sodium carbonate
- zinc plating
- alkaline zinc
- plating liquid
- electroplating bath
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/16—Regeneration of process solutions
- C25D21/18—Regeneration of process solutions of electrolytes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/22—Electroplating: Baths therefor from solutions of zinc
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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)
- Chemically Coating (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Abstract
The removal technique of sodium carbonate in a kind of alkaline zinc plating liquid, comprises the following steps:The concentration of sodium carbonate in detection electroplating bath,Alkaline zinc plating liquid is carried out crystallisation by cooling,By stepThe alkaline zinc plating liquid obtained and the mixed solution of crystals of sodium carbonate are separated by centrifugal dehydrator,Alkaline zinc plating liquid stream reclaims to liquid medicine accumulator tank, crystals of sodium carbonate；
Description
Technical field
The present invention relates to chemical technology field, be specifically related to the removal technique of sodium carbonate in a kind of alkaline zinc plating liquid.
Background technology
Basic plating zincate (zinc-plated or zinc-nickel alloy) technique, inside electroplate liquid containing caustic soda (in electroplating process
Produce), sodium carbonate can be produced on electroplate liquid surface with air contact generation oxidation reaction.Along with persistently carrying out of plating, plating
Carbonate content inside medicinal liquid can improve constantly, and when the concentration of sodium carbonate exceedes admissible scope, can cause plating speed
Spend slack-off, affect electroplating effect.
Alkaline zinc plating liquid production and application can produce the accumulation of sodium carbonate after 1 year, general requirement is less than 60g/L, when containing
Measure more than electroplating liquid medicine internal resistance increase during 80g/L, temperature rise is accelerated, plating upper density limit reduces, and the electric conductivity of electroplate liquid is deteriorated.Work
Skill requires current density range to be 1 ~ 4A/dm2 and is the most only raised to about 1.3A/dm2, when electric current density is slightly higher, just has
Corner is burnt simultaneously electroplating liquid medicine and is heated up too fast, and dispersibility and covering power are deteriorated, and electroplating liquid medicine is pale brown and the limpidest, coating
Fragility becomes big phenomenon.Electroplating efficiency reduces, electroplating time increases, and wastes resource, strengthens cost.
Traditional process includes following several method:
1) winter nights freezing method of cleaning: winter, is extracted into storage outdoors groove by bath solution, carries out one night of naturally frozen,
Clear up sodium carbonate bottom accumulator tank the next morning.The method needs continuous freezing at least 3 times, but can not fully erased carbonic acid
Sodium.Shortcoming: utilize ambient temperature to cool down, season, limitation was big, and south temperature height is not met by requirement, need to prepare one and
Electroplate liquid is pumped through to process to transfer again and goes back by the trough that coating bath volume is the biggest, and volume accounts for greatly hall space, and processing speed is slow,
And need to stop production, production efficiency is low, and utilization rate of equipment and installations declines, and production cost increases.
2) artificial ice cube freezing method of cleaning: take suitable rustless steel metal bucket, fill ice cube, put in solution, static one section
Time, solution meet cold after i.e. can on ice bucket outer wall crystallization, such continuous processing repeatedly, can reduce carbonate content,
But can not fully erased sodium carbonate.Shortcoming: using ice cube local indirectly to cool down electroplate liquid, heat exchange efficiency is low, operation is complicated, processes
Speed is the slowest.The method is also required to stop production, and production efficiency is low, and utilization rate of equipment and installations declines, and production cost increases.
3) Calx or quick lime method of cleaning.Shortcoming: need to invest a set of large-scale filter plant, the operation water to workman
Flat requirement height, has the risk scrapping whole groove electroplate liquid, also needs to electroplate liquid is taken away the carbonic acid clearing up trench bottom again after having processed
Calcium, quantities is huge.Equipment also needs to stop production, and cost increases.
4) solution cleaning partially spent method: when cleaning is safeguarded, scrap a part of bottom solution, add a part of new soln weight
Newly join groove.Shortcoming: need to scrap electroplate liquid, equipment need to stop production process, and cost is the highest.
Therefore, for the problems referred to above, the present invention proposes a kind of new technical scheme.
Summary of the invention
It is an object of the invention to provide a kind of easy to operate, circular treatment, high treating effect, save production cost, and
And do not interfere with the removal technique of sodium carbonate in the alkaline zinc plating liquid of production.
The present invention is achieved by the following technical solutions:
The removal technique of sodium carbonate in a kind of alkaline zinc plating liquid, for removing the sodium carbonate of excess in alkaline zinc plating liquid, so that should
The repeatable utilization of alkaline zinc plating liquid, comprises the following steps:
The concentration of sodium carbonate in detection electroplating bath, when in alkaline zinc plating liquid, the concentration of sodium carbonate is more than 60g/L, need to be to alkali
Sodium carbonate in property galvanizing flux processes；
A part of alkaline zinc plating liquid in electroplating bath is imported in crystallization tank by catheter, then alkaline zinc plating liquid is entered
Row crystallisation by cooling, temperature controls, at 3 ~ 5 DEG C, at the uniform velocity to be stirred alkaline zinc plating liquid by agitator arm during crystallisation by cooling
Mixing, the speed of stirring is 140 ~ 160r/min, until crystals of sodium carbonate is not further added by；
By stepThe alkaline zinc plating liquid obtained and the mixed solution of crystals of sodium carbonate are drained in centrifugal dehydrator, then
By centrifugal dehydrator, alkaline zinc plating liquid and crystals of sodium carbonate being separated, the rotating speed of centrifugal dehydrator controls 480 ~
520r/min, the time controls at 5 ~ 10min；
StepThe middle alkaline zinc plating liquid stream through separating from dewaterer reclaims to liquid medicine accumulator tank, crystals of sodium carbonate；
Liquid medicine accumulator tank is back in electroplating bath, then repeat the above steps, processes back and forth, by carbonic acid in electroplating bath
Na concn controls within 60g/L.
Further, the volume of crystallization tank is less than the volume of electroplating bath.
Further, described stepMiddle crystals of sodium carbonate is Sorbet shape structure, and size is 20 ~ 40 mesh.
Further, described step, step, stepAnd stepIn electroplating bath, crystallization tank, centrifuge dehydration
Machine and liquid medicine accumulator tank form a set of blood circulation.
Further, described stepThe time of middle crystallisation by cooling and the volume of crystallization tank are directly proportional.
The invention has the beneficial effects as follows: it is convenient that sodium carbonate proposed by the invention removes technological operation, rational technology passes through
Cooperate between electroplating bath, crystallization tank, centrifugal dehydrator and liquid medicine accumulator tank, form the processing procedure of a set of circulation, it is ensured that
The quality of the liquid medicine in electroplating bath, thus ensure that the quality of product, meanwhile, this process efficiency is high, and utilization rate of equipment and installations is high, compares
Prior art, it is not necessary to stop producing, can synchronize to act on, substantially increase treatment effeciency, and, significantly reduce
Processing cost, improves economic benefit.
Detailed description of the invention
The removal technique of sodium carbonate in a kind of alkaline zinc plating liquid, for removing the sodium carbonate of excess in alkaline zinc plating liquid, with
Make this repeatable utilization of alkaline zinc plating liquid, comprise the following steps:
The concentration of sodium carbonate in detection electroplating bath, when in alkaline zinc plating liquid, the concentration of sodium carbonate is more than 60g/L, need to be to alkali
Sodium carbonate in property galvanizing flux processes；
A part of alkaline zinc plating liquid in electroplating bath is imported in crystallization tank by catheter, then alkaline zinc plating liquid is entered
Row crystallisation by cooling, temperature controls, at 3 ~ 5 DEG C, at the uniform velocity to be stirred alkaline zinc plating liquid by agitator arm during crystallisation by cooling
Mixing, the speed of stirring is 140 ~ 160r/min, until crystals of sodium carbonate is not further added by；
By stepThe alkaline zinc plating liquid obtained and the mixed solution of crystals of sodium carbonate are drained in centrifugal dehydrator, then
By centrifugal dehydrator, alkaline zinc plating liquid and crystals of sodium carbonate being separated, the rotating speed of centrifugal dehydrator controls 480 ~
520r/min, the time controls at 5 ~ 10min；
StepThe middle alkaline zinc plating liquid stream through separating from dewaterer reclaims to liquid medicine accumulator tank, crystals of sodium carbonate；
Liquid medicine accumulator tank is back in electroplating bath, then repeat the above steps, processes back and forth, by carbonic acid in electroplating bath
Na concn controls within 60g/L.
In the art, the volume of crystallization tank is less than the volume of electroplating bath, described stepMiddle crystals of sodium carbonate is Sorbet
Shape structure, size is 20 ~ 40 mesh, step, step, stepAnd stepIn electroplating bath, crystallization tank, from
Heart dewaterer and liquid medicine accumulator tank form a set of blood circulation, stepThe time of middle crystallisation by cooling just becomes with the volume of crystallization tank
Ratio.
Below in conjunction with embodiment, the present invention is described further.
Embodiment 1
The volume assuming pending electroplating bath neutral and alkali galvanizing flux is 43200L, and the capacity of crystallization tank is 200L.
The removal technique of sodium carbonate in a kind of alkaline zinc plating liquid, for removing the sodium carbonate of excess in alkaline zinc plating liquid, with
Make this repeatable utilization of alkaline zinc plating liquid, comprise the following steps:
The concentration of sodium carbonate in detection electroplating bath, when in alkaline zinc plating liquid, the concentration of sodium carbonate is more than 60g/L, need to be to alkali
Sodium carbonate in property galvanizing flux processes；
Alkaline zinc plating liquid in electroplating bath is imported by catheter in the crystallization tank of 200L, then alkaline zinc plating liquid is entered
Row crystallisation by cooling, temperature controls, at 3 ~ 5 DEG C, at the uniform velocity to be stirred alkaline zinc plating liquid by agitator arm during crystallisation by cooling
Mixing, the speed of stirring is 140 ~ 160r/min, and the time controls at 2.5 ~ 2.8h；
By stepThe alkaline zinc plating liquid obtained and the mixed solution of crystals of sodium carbonate are drained in centrifugal dehydrator, then
By centrifugal dehydrator, alkaline zinc plating liquid and crystals of sodium carbonate being separated, the rotating speed of centrifugal dehydrator controls 480 ~
520r/min, the time controls at 5 ~ 10min；
StepThe middle alkaline zinc plating liquid stream through separating from dewaterer reclaims to liquid medicine accumulator tank, crystals of sodium carbonate；
Liquid medicine accumulator tank is back in electroplating bath, then repeat the above steps, processes back and forth, by carbonic acid in electroplating bath
Na concn controls within 60g/L.
In the present embodiment, the time of a processing cycle process is about 3 hours, and a processing cycle is got off and about may be used
Remove the sodium carbonate of 60 ~ 90KG, volume be about the whole circular treatment of alkaline zinc plating liquid time once of 43200L 27 ~
30d。
It is convenient that sodium carbonate proposed by the invention removes technological operation, rational technology, by electroplating bath, crystallization tank, is centrifuged
Cooperate between dewaterer and liquid medicine accumulator tank, form the processing procedure of a set of circulation, it is ensured that the matter of the liquid medicine in electroplating bath
Amount, thus ensure that the quality of product, meanwhile, this process efficiency is high, and utilization rate of equipment and installations is high, compared to existing technology, it is not necessary to stop
Only produce, can synchronize to act on, substantially increase treatment effeciency, and, significantly reduce processing cost, improve through
Ji benefit.
The sodium carbonate technique being previously mentioned in the present invention, is applicable not only to going of sodium carbonate in the carbonate liquid in alkaline zinc plating liquid
Remove, be also suitable the removal of sodium carbonate in other electroplate liquids such as zinc-nickel alloy liquid.For a person skilled in the art, this
Bright can have various modifications and variations.All within the spirit and principles in the present invention, any amendment, the equivalent made, change
Enter, should be included within the scope of the present invention.
Claims (5)
1. a removal technique for sodium carbonate in alkaline zinc plating liquid, for removing the sodium carbonate of excess in alkaline zinc plating liquid, so that
This repeatable utilization of alkaline zinc plating liquid, it is characterised in that: comprise the following steps:
The concentration of sodium carbonate in detection electroplating bath, when in alkaline zinc plating liquid, the concentration of sodium carbonate is more than 60g/L, need to be to alkalescence
Sodium carbonate in galvanizing flux processes；
A part of alkaline zinc plating liquid in electroplating bath is imported in crystallization tank by catheter, then alkaline zinc plating liquid is carried out
Crystallisation by cooling, temperature controls, at 3 ~ 5 DEG C, at the uniform velocity to be stirred alkaline zinc plating liquid by agitator arm during crystallisation by cooling
Mixing, the speed of stirring is 140 ~ 160r/min, until crystals of sodium carbonate is not further added by；
By stepThe alkaline zinc plating liquid obtained and the mixed solution of crystals of sodium carbonate are drained in centrifugal dehydrator, then lead to
Crossing centrifugal dehydrator to separate alkaline zinc plating liquid and crystals of sodium carbonate, the rotating speed of centrifugal dehydrator controls at 480 ~ 520r/
Min, the time controls at 5 ~ 10min；
StepThe middle alkaline zinc plating liquid stream through separating from dewaterer reclaims to liquid medicine accumulator tank, crystals of sodium carbonate；
Liquid medicine accumulator tank is back in electroplating bath, then repeat the above steps, processes back and forth, by sodium carbonate in electroplating bath
Concentration controls within 60g/L.
The removal technique of sodium carbonate in a kind of alkaline zinc plating liquid, it is characterised in that: the body of crystallization tank
The long-pending volume less than electroplating bath.
The removal technique of sodium carbonate in a kind of alkaline zinc plating liquid, it is characterised in that: described step
Middle crystals of sodium carbonate is Sorbet shape structure, and size is 20 ~ 40 mesh.
The removal technique of sodium carbonate in a kind of alkaline zinc plating liquid, it is characterised in that: described step
, step, stepAnd stepIn electroplating bath, crystallization tank, centrifugal dehydrator and liquid medicine accumulator tank form a set of cyclic system
System.
The removal technique of sodium carbonate in a kind of alkaline zinc plating liquid, it is characterised in that: described step
The time of middle crystallisation by cooling and the volume of crystallization tank are directly proportional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610521448.7A CN106149016A (en) | 2016-07-05 | 2016-07-05 | The removal technique of sodium carbonate in a kind of alkaline zinc plating liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610521448.7A CN106149016A (en) | 2016-07-05 | 2016-07-05 | The removal technique of sodium carbonate in a kind of alkaline zinc plating liquid |
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| Publication Number | Publication Date |
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| CN106149016A true CN106149016A (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610521448.7A Pending CN106149016A (en) | 2016-07-05 | 2016-07-05 | The removal technique of sodium carbonate in a kind of alkaline zinc plating liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109537036A (en) * | 2019-01-05 | 2019-03-29 | 上海裕继金属制品有限公司 | A kind of auxiliary system of electroplating technology |
-
2016
- 2016-07-05 CN CN201610521448.7A patent/CN106149016A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109537036A (en) * | 2019-01-05 | 2019-03-29 | 上海裕继金属制品有限公司 | A kind of auxiliary system of electroplating technology |
| CN109537036B (en) * | 2019-01-05 | 2020-10-20 | 上海裕继金属制品有限公司 | Auxiliary system of electroplating process |
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Application publication date: 20161123 |