CN101230480A - Electroplating reverse-flow rinsing process - Google Patents
Electroplating reverse-flow rinsing process Download PDFInfo
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- CN101230480A CN101230480A CNA2007101132718A CN200710113271A CN101230480A CN 101230480 A CN101230480 A CN 101230480A CN A2007101132718 A CNA2007101132718 A CN A2007101132718A CN 200710113271 A CN200710113271 A CN 200710113271A CN 101230480 A CN101230480 A CN 101230480A
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- rinse
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000009713 electroplating Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000007921 spray Substances 0.000 claims abstract description 30
- 238000011282 treatment Methods 0.000 claims abstract description 13
- 238000005342 ion exchange Methods 0.000 claims abstract description 12
- 239000008399 tap water Substances 0.000 claims abstract description 12
- 235000020679 tap water Nutrition 0.000 claims abstract description 12
- 238000011084 recovery Methods 0.000 claims abstract description 10
- 238000003860 storage Methods 0.000 claims abstract description 6
- 238000013019 agitation Methods 0.000 claims description 11
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 5
- 229910021645 metal ion Inorganic materials 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 12
- 238000007747 plating Methods 0.000 abstract description 11
- 229910052759 nickel Inorganic materials 0.000 abstract description 6
- 239000002351 wastewater Substances 0.000 abstract description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052804 chromium Inorganic materials 0.000 abstract description 5
- 239000011651 chromium Substances 0.000 abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052802 copper Inorganic materials 0.000 abstract description 4
- 239000010949 copper Substances 0.000 abstract description 4
- 239000008237 rinsing water Substances 0.000 abstract 3
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000006200 vaporizer Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 150000001455 metallic ions Chemical class 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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Abstract
The invention discloses an electroplating countercurrent rinsing technique. When electroplated and taken out of the plating solution tank, a workpiece is rinsed from a primary rinsing tank to a final rinsing tank in sequence. After an ion-exchange treatment, the tap water enters from the final rinsing tank and then is guided into a superior rinsing tank step by step, and the rinsing water overflowing from the primary rinsing tank reenters a storage tank to be recovered and stored. After being rinsed and taken out of a certain rinsing tank, the workpiece is conducted an atomized spray by the rinsing water from an inferior rinsing tank, the duration of the atomized spray is controlled to be 4 to 15 seconds and the pressure of the atomizing nozzle is controlled to be 0.04 to 0.1 MPa. The invention facilitates the plated workpiece to have a desirable rinsing effect. The water consumption for rinsing the workpiece is reduced to 1/20 to 1/15 of the water consumption by the traditional countercurrent rinsing technique. The rinsing water can realize a closed cycle and the wastewater can realize a zero discharge. The water utilization rate in the rinsing process can reach 98 percent and the recovery rate for the raw chemical materials of copper, nickel, chromium and zinc ions can reach 98 percent.
Description
Technical field the present invention relates to the cleaning of electroplating parts, directly relates to the reverse-flow rinsing process to the rack plating workpiece, is particularly suitable for the cleaning after workpiece chromium plating, nickel plating, the zinc-plated or copper facing.
Background technology is at electroplating industry, carries out cleaning after the most general plating that countercurrent rinsing remains current employing after workpiece is electroplated, especially with chromium plating, nickel plating, zinc-plated or the supporting use of copper-plating technique is more common.Its advantage is can streamline operration, and production efficiency is higher, but shortcoming is also very outstanding, and that is exactly to have wasted water resources in a large number.If waste water is not administered and can serious environment pollution, if can increase great amount of investment again to waste water centralized treatment and improve production cost, sometimes even the existence of entail dangers to enterprise.To the electroplating parts atomizing spray is a kind of theory that electroplating parts is cleaned that the eighties is just proposed by the expert in last century, adopt atomizing spray technology that the cleaning performance of workpiece is better than reverse-flow rinsing process, same this technology also exists the problem of a large amount of waste water resources, and two also find no clear, complete, concrete and the atomizing spray technical scheme of economizing on water successful Application aborning during the last ten years always.
Summary of the invention purpose of the present invention will provide a kind of improved electroplating reverse-flow rinsing process exactly, and it can overcome existing electroplating reverse-flow rinsing process effectively and have the problem that water resource waste is serious, waste water is difficult to administer.
The object of the present invention is achieved like this: electroplating reverse-flow rinsing process, workpiece carries out rinsing successively from elementary rinse bath to final stage rinse bath electroplate out groove in bath trough after, tap water enters from the final stage rinse bath after ion exchange treatment, then successively to the upper level rinse bath mend into, the rinse water of overflowing from rinse bath enters hold tank recovery storage again, described to the upper level rinse bath mend into technological process be the technological process of guide groove step by step stage by stage, described rinse water is from the process of overflow process for only overflowing from elementary rinse bath of rinse bath, described workpiece is after certain one-level rinse bath rinsing goes out groove, use rinse water from the next stage rinse bath to the workpiece atomizing spray again, spray time is controlled at 4-15 second, and the atomizing nozzle pressure-controlling is at 0.04-0.1MPa.
As further scheme of the present invention be: the agitation air that the rinse water of rinse baths at different levels is fed 0.02-0.06MPa pressure at rinsing process.
As further scheme of the present invention be: will send into evaporator evaporation from the rinse water that described hold tank recovery is stored again and concentrate, the gained water of condensation is mended into the final stage rinse bath, and gained plated metal ion concentrated solution is mended into bath trough.
The present invention is because the technical scheme that adopted the classification countercurrent rinsing to combine with atomizing spray, and chosen rational atomizing spray parameter, thereby the cleaning performance of electroplating parts is even more ideal; Among the present invention because what the atomizing spray of the workpiece after every grade of rinsing was adopted is rinse water from the next stage rinse bath, thereby make workpiece take that plated metal ionic amount reduces greatly in the next stage rinse bath rinse water to, thereby greatly reduced the number of times that upgrades rinse water in the rinse bath, prolonged the life cycle of rinse water; For this reason, also become regularly upwards the controllable quantification water of guide groove step by step from final stage to the circulate rinse water upgraded of higher level by the perennial draingage of overflow at any time; The present invention feeds the agitation air of selective pressure to the rinse water of rinse bath in rinsings at different levels after, make the cleaning performance of workpiece even more ideal, further reduced workpiece and the plated metal ion brought into the probability of next stage rinse bath, thereby also further prolonged the life cycle of rinse water, reduced from final stage to higher level's rinse bath number of times of guide groove step by step; After adopting the present invention, the cleaning workpiece water consumption can be reduced to the 1/20-1/15 of conventional counter-current rinsing process water consumption; The very big reduction of water consumption greatly facilitates the processing of high-concentration metallic ions water again, also make will reclaim the plating of storing from hold tank after rinse water send into the concentrated possibility that becomes of evaporator evaporation, and evaporation concentration gained water of condensation can be mended into the final stage rinse bath again and recycles, the gained concentrated solution is mended into bath trough and is reused, thereby realize the closed cycle of rinse water, realize the zero release of waste water, this has saved the expense of a large amount of waste water treatments again, add up according to detected result, the water resources cyclic utilization rate of cleaning process can reach 98%, copper, nickel, chromium, the zine ion industrial chemicals rate of recovery can reach 98%.
Description of drawings Fig. 1 is the process flow sheet of first kind of embodiment of the present invention, and Fig. 2 is the process flow sheet of second kind of embodiment of the present invention, and Fig. 3 is the process flow sheet of the third embodiment of the present invention.The invention will be further described below in conjunction with accompanying drawing.
Embodiment Fig. 1 shows the technical process of first kind of embodiment of electroplating reverse-flow rinsing process of the present invention.The structure of each several part is: hang hanger 2 on utmost point thick stick 1, hang workpiece 3 on the hanger 2, but driving is carried workpiece 3 left and right horizontal and is moved, workpiece 3 is delivered in the top of bath trough and each rinse bath in realization, above the rinse baths at different levels before the final stage, atomizing nozzle 4 is set, each atomizing nozzle 4 is corresponding respectively to be communicated with the next stage rinse bath and to be controlled by computer and spray water, water-in 5 is set above the final stage rinse bath, tap water enters after ion exchange treatment thus, overflow port to the hold tank draining is set on the elementary rinse bath, road of falling the barrel and liquid pump also is set step by step by final stage rinse bath to elementary rinse bath.Idiographic flow is: workpiece 3 carries out rinsing successively from elementary rinse bath to final stage rinse bath electroplate out groove in bath trough after, rinsing process is elected three to six grades as, the Pyatyi that is divided into shown in Figure 1, that is: elementary rinsing, secondary rinsing, three grades of rinsings, level Four rinsing and final rinse, tap water enters from the final stage rinse bath after ion exchange treatment, then successively to the upper level rinse bath mend into, the mode of mend for stage by stage step by step guide groove mend into, containing plated metal ionic concentration according to final stage rinse bath rinse water the opportunity that benefit is gone into determines, the rinse water of overflowing from rinse bath enters hold tank recovery storage again, the overflow port that only is provided with from elementary rinse bath that overflows of rinse water is discharged, workpiece 3 is after certain one-level rinse bath rinsing goes out groove, use again from the rinse water of next stage rinse bath and carry out atomizing spray, spray time is controlled at 4-15 second, and the pressure-controlling of atomizing nozzle 4 is at 0.04-0.1MPa.When workpiece 3 is the product of the simple external structure of hand-operated tools class, spray time is controlled at 4-6 second, and when workpiece 3 was the product of complex class external structure, spray time was controlled at 10-15 second, when workpiece 3 was the product of external structure of general complexity, spray time was controlled at 6-10 second.
Fig. 2 shows the technical process of second kind of embodiment of electroplating reverse-flow rinsing process of the present invention.The structure of each several part is: hang hanger 2 on utmost point thick stick 1, hang workpiece 3 on the hanger 2, but driving is carried workpiece 3 left and right horizontal and is moved, thereby realize workpiece 3 is delivered to the top of bath trough and each rinse bath, above the rinse baths at different levels before the final stage, atomizing nozzle 4 is set, each atomizing nozzle 4 is corresponding respectively to be communicated with the next stage rinse bath and to be controlled by computer and spray water, water-in 5 is set above the final stage rinse bath, tap water enters after ion exchange treatment thus, overflow port to the hold tank draining is set on the elementary rinse bath, by final stage rinse bath to elementary rinse bath road of falling the barrel and liquid pump are set step by step also, agitation air nozzle 6 also is set, the perforated tube of the structure choice internal diameter 20-25mm of agitation air nozzle 6 below rinse baths at different levels.Idiographic flow is: workpiece 3 carries out rinsing successively from elementary rinse bath to final stage rinse bath electroplate out groove in bath trough after, rinsing process is elected three to six grades as, the Pyatyi that is divided into shown in Figure 2, that is: elementary rinsing, secondary rinsing, three grades of rinsings, level Four rinsing and final rinse, tap water enters from the final stage rinse bath after ion exchange treatment, then successively to the upper level rinse bath mend into, the mode of mend for stage by stage step by step guide groove mend into, containing plated metal ionic concentration according to final stage rinse bath rinse water the opportunity that benefit is gone into determines, the rinse water of overflowing from rinse bath enters hold tank recovery storage again, the overflow port that only is provided with from elementary rinse bath that overflows of rinse water is discharged, workpiece 3 is after certain one-level rinse bath rinsing goes out groove, use again from the rinse water of next stage rinse bath and carry out atomizing spray, spray time is controlled at 4-15 second, the pressure-controlling of atomizing nozzle 4 is at 0.04-0.1MPa, and the pressure that feeds the agitation air nozzle 6 of agitation air to rinse baths at different levels is chosen as 0.02-0.06MPa.When workpiece 3 is the product of the simple external structure of hand-operated tools class, spray time is controlled at 4-6 second, and when workpiece 3 was the product of complex class external structure, spray time was controlled at 10-15 second, when workpiece 3 was the product of external structure of general complexity, spray time was controlled at 6-10 second.
Fig. 3 shows the technical process of the third embodiment of electroplating reverse-flow rinsing process of the present invention.The structure of each several part is: hang hanger 2 on utmost point thick stick 1, hang workpiece 3 on the hanger 2, but driving is carried workpiece 3 left and right horizontal and is moved, thereby realize workpiece 3 is delivered to the top of bath trough and each rinse bath, above the rinse baths at different levels before the final stage, atomizing nozzle 4 is set, each atomizing nozzle 4 is corresponding respectively to be communicated with the next stage rinse bath and to be controlled by computer and spray water, water-in 5 is set above the final stage rinse bath, tap water enters after ion exchange treatment thus, overflow port to the hold tank draining is set on the elementary rinse bath, by final stage rinse bath to elementary rinse bath road of falling the barrel and liquid pump are set step by step also, agitation air nozzle 6 also is set below rinse baths at different levels, the perforated tube of the structure choice internal diameter 20-25mm of agitation air nozzle 6, hold tank also links to each other with vaporizer, vaporizer is preferentially selected thin-film evaporator for use, and the condensation-water drain of vaporizer links to each other with the final stage rinse bath, and the plated metal ion concentrated solution outlet of vaporizer links to each other with bath trough.Idiographic flow is: workpiece 3 carries out rinsing successively from elementary rinse bath to final stage rinse bath electroplate out groove in bath trough after, rinsing process is elected three to six grades as, the Pyatyi that is divided into shown in Figure 3, that is: elementary rinsing, secondary rinsing, three grades of rinsings, level Four rinsing and final rinse, tap water enters from the final stage rinse bath after ion exchange treatment, then successively to the upper level rinse bath mend into, the mode of mend for stage by stage step by step guide groove mend into, containing plated metal ionic concentration according to final stage rinse bath rinse water the opportunity that benefit is gone into determines, the rinse water of overflowing from rinse bath enters hold tank recovery storage again, the overflow port that only is provided with from elementary rinse bath that overflows of rinse water is discharged, workpiece 3 is after certain one-level rinse bath rinsing goes out groove, use again from the rinse water of next stage rinse bath and carry out atomizing spray, spray time is controlled at 4-15 second, the pressure-controlling of atomizing nozzle 4 is at 0.04-0.1MPa, the pressure that feeds the agitation air nozzle 6 of agitation air to rinse baths at different levels is chosen as 0.02-0.06MPa, to send into evaporator evaporation from the rinse water that described hold tank recovery is stored again concentrates, the gained water of condensation is mended into the final stage rinse bath, and gained plated metal ion concentrated solution is mended into bath trough.When workpiece 3 is the product of the simple external structure of hand-operated tools class, spray time is controlled at 4-6 second, and when workpiece 3 was the product of complex class external structure, spray time was controlled at 10-15 second, when workpiece 3 was the product of external structure of general complexity, spray time was controlled at 6-10 second.
For adopting chromium plating production line of the present invention, to carry out guide groove when the concentration of hexavalent chromium reaches 0.5mg/L in the final stage rinse bath, the rinse water that is about in the elementary rinse bath imports hold tank, successively the rinse water in the next stage rinse bath is imported the upper level rinse bath then, tap water is mended after ion exchange treatment from the final stage rinse bath.
For adopting nickel plating production line of the present invention, to carry out guide groove when nickel concentration reaches 0.8mg/L in the final stage rinse bath, the rinse water that is about in the elementary rinse bath imports hold tank, successively the rinse water in the next stage rinse bath is imported the upper level rinse bath then, tap water is mended after ion exchange treatment from the final stage rinse bath.
For adopting copper facing production line of the present invention, to carry out guide groove when the concentration of cupric ion reaches 0.5mg/L in the final stage rinse bath, the rinse water that is about in the elementary rinse bath imports hold tank, successively the rinse water in the next stage rinse bath is imported the upper level rinse bath then, tap water is mended after ion exchange treatment from the final stage rinse bath.
Claims (3)
1. electroplating reverse-flow rinsing process, workpiece (3) carries out rinsing successively from elementary rinse bath to final stage rinse bath electroplate out groove in bath trough after, tap water enters from the final stage rinse bath after ion exchange treatment, then successively to the upper level rinse bath mend into, the rinse water of overflowing from rinse bath enters hold tank recovery storage again, it is characterized in that: described to the upper level rinse bath mend into technological process be the technological process of guide groove step by step stage by stage, described rinse water is from the process of overflow process for only overflowing from elementary rinse bath of rinse bath, described workpiece (3) is after certain one-level rinse bath rinsing goes out groove, use again from the rinse water of next stage rinse bath and carry out atomizing spray, spray time is controlled at 4-15 second, and atomizing nozzle (4) pressure-controlling is at 0.04-0.1MPa.
2. electroplating reverse-flow rinsing process according to claim 1 is characterized in that: the agitation air that the rinse water of rinse baths at different levels is fed 0.02-0.06MPa pressure at rinsing process.
3. electroplating reverse-flow rinsing process according to claim 1 and 2, it is characterized in that: will send into evaporator evaporation from the rinse water that described hold tank recovery is stored again and concentrate, the gained water of condensation is mended into the final stage rinse bath, and gained plated metal ion concentrated solution is mended into bath trough.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101132718A CN101230480B (en) | 2007-10-29 | 2007-10-29 | Electroplating reverse-flow rinsing process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101132718A CN101230480B (en) | 2007-10-29 | 2007-10-29 | Electroplating reverse-flow rinsing process |
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| Publication Number | Publication Date |
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| CN101230480A true CN101230480A (en) | 2008-07-30 |
| CN101230480B CN101230480B (en) | 2010-06-02 |
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| CN2007101132718A Expired - Fee Related CN101230480B (en) | 2007-10-29 | 2007-10-29 | Electroplating reverse-flow rinsing process |
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| CN102531254A (en) * | 2010-12-21 | 2012-07-04 | 苏州市甘泉自动化环保设备厂 | Closed cycle and zero emission method for electroplating wastewater |
| CN102605399A (en) * | 2011-09-29 | 2012-07-25 | 山东建筑大学 | On-line recycling method for steel strip continuous copper plating |
| CN102877113A (en) * | 2011-07-14 | 2013-01-16 | 天津市大港镀锌厂 | Zero discharge and recycling method of chrome plating automatic line rinse water |
| CN102877112A (en) * | 2012-09-09 | 2013-01-16 | 东营宏源机械设备有限公司 | Backflow water washing equipment |
| CN103132126A (en) * | 2011-12-01 | 2013-06-05 | 天津市大港镀锌厂 | Novel electroplating hard chrome technology method |
| CN103130375A (en) * | 2011-11-25 | 2013-06-05 | 合肥杰事杰新材料股份有限公司 | Sewage zero discharge system of waste plastic recycling |
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| CN108249494A (en) * | 2016-12-29 | 2018-07-06 | 太仓市诚可盛机械设备有限公司 | A kind of water-saving waste liquid high efficiency recovery processing technique |
| CN108441908A (en) * | 2018-05-23 | 2018-08-24 | 惠州卓越紧固系统有限公司 | A kind of automatic rinsing wire body device |
| CN109721201A (en) * | 2019-03-05 | 2019-05-07 | 天津市富仁板带有限公司 | Water process environmental protecting device for the cleaning of tin plating plate |
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| CN2092546U (en) * | 1991-05-03 | 1992-01-08 | 周荣廷 | Washing equipment being able to recover galvanization solution entirely |
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| CN102531254A (en) * | 2010-12-21 | 2012-07-04 | 苏州市甘泉自动化环保设备厂 | Closed cycle and zero emission method for electroplating wastewater |
| CN102877113A (en) * | 2011-07-14 | 2013-01-16 | 天津市大港镀锌厂 | Zero discharge and recycling method of chrome plating automatic line rinse water |
| CN102605399A (en) * | 2011-09-29 | 2012-07-25 | 山东建筑大学 | On-line recycling method for steel strip continuous copper plating |
| CN103130375A (en) * | 2011-11-25 | 2013-06-05 | 合肥杰事杰新材料股份有限公司 | Sewage zero discharge system of waste plastic recycling |
| CN103132126A (en) * | 2011-12-01 | 2013-06-05 | 天津市大港镀锌厂 | Novel electroplating hard chrome technology method |
| CN103132126B (en) * | 2011-12-01 | 2016-06-15 | 天津市大港镀锌厂 | Novel electroplating hard chrome process method |
| CN102877112A (en) * | 2012-09-09 | 2013-01-16 | 东营宏源机械设备有限公司 | Backflow water washing equipment |
| CN103324039A (en) * | 2013-07-01 | 2013-09-25 | 淳华科技(昆山)有限公司 | Cleaning system for selection plating product developing process |
| CN108249494A (en) * | 2016-12-29 | 2018-07-06 | 太仓市诚可盛机械设备有限公司 | A kind of water-saving waste liquid high efficiency recovery processing technique |
| CN108441908A (en) * | 2018-05-23 | 2018-08-24 | 惠州卓越紧固系统有限公司 | A kind of automatic rinsing wire body device |
| CN109721201A (en) * | 2019-03-05 | 2019-05-07 | 天津市富仁板带有限公司 | Water process environmental protecting device for the cleaning of tin plating plate |
| CN112195502A (en) * | 2019-06-23 | 2021-01-08 | 上海梅山钢铁股份有限公司 | Recovery device and recovery method for efficient tin methanesulfonate electroplating solution |
| CN112195502B (en) * | 2019-06-23 | 2023-02-28 | 上海梅山钢铁股份有限公司 | A recovery device and recovery method for high-efficiency tin methanesulfonate-based electroplating solution |
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| CN112481671B (en) * | 2019-09-12 | 2024-05-10 | 上海梅山钢铁股份有限公司 | Reflow pretreatment device and method for low-tin-layer electroplated tin plate |
| CN111389801A (en) * | 2020-04-16 | 2020-07-10 | 生态环境部华南环境科学研究所 | Automatic cleaning water-saving device and cleaning method for electroplating production |
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| CN112410865A (en) * | 2020-10-09 | 2021-02-26 | 厦门市同利源电气设备有限公司 | Novel surface treatment system |
| CN112547675A (en) * | 2020-11-23 | 2021-03-26 | 阜阳市世科智能设备有限公司 | Hardware processing is with wasing drying equipment |
| CN113818058A (en) * | 2021-11-22 | 2021-12-21 | 新恒汇电子股份有限公司 | Electroplating process of countercurrent washing for lead frame |
| CN113818058B (en) * | 2021-11-22 | 2022-03-15 | 新恒汇电子股份有限公司 | Electroplating process of countercurrent washing for lead frame |
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