CN102766883A - Spent solder stripper recovery method and equipment - Google Patents
Spent solder stripper recovery method and equipment Download PDFInfo
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- CN102766883A CN102766883A CN2011101586613A CN201110158661A CN102766883A CN 102766883 A CN102766883 A CN 102766883A CN 2011101586613 A CN2011101586613 A CN 2011101586613A CN 201110158661 A CN201110158661 A CN 201110158661A CN 102766883 A CN102766883 A CN 102766883A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
Disclosed are a spent solder stripper recovery method and equipment. The recovery method comprises the following steps of: adding the spent solder stripper into a tin setting tank, starting stirring, adding 30% of sodium hydroxide, controlling pH value of the solution to 5-7, adding a tin setting activator to make tin sludge coagulate, pumping the tin sludge slurry into a plate-and-frame filter press for solid-liquid separation so as to obtain filter residue which mainly contains tin, iron and a small amount of copper and are directly sold, allowing a filtrate to enter a copper electrowinning trough, electrowinning to obtain high-purity dense metal copper, acquiring less than 0.5g/L of copper in a raffinate after copper electrowinning, pumping raffinate into an adjusting system, adding nitric acid and a small amount of additive, and returning to a production line for use. According to the invention, valuable metals in the spent solder stripper are recovered, and wastewater is processed to return to the production line for recycling. Thus, water pollution to the environment is reduced to zero discharge. The spent solder stripper recovery method provided by the invention is a novel environmental protection technology which has effects of saving energy, reducing emission and changing wastes into valuables.
Description
Technical field
The present invention relates to trade effluent environmental protection treatment recovery technology field, be specifically related to a kind of printed substrate waste tin stripper recovery method and equipment.
Background technology
It mainly is alkaline chemical precipitation that existing printed substrate waste tin stripper is handled; Filter back waste water and efflux, because of containing heavy metal and large amount of organic in the waste water, directly discharging causes the huge pollution of environment; And the useful component in the waste water can not get recycle, caused the wasting of resources.Secondly prior art can not effectively extract the copper in the waste tin stripper, and copper and tin coprecipitation cause the later separation difficulty, have increased the cost of further purification.
Summary of the invention
Technical problem to be solved by this invention is: solve the problem that above-mentioned prior art exists; And a kind of waste tin stripper recovery method and equipment are provided; Valuable metal in the waste tin stripper is recycled, and waste water returns production line and recycles through handling; The water of environment polluted reducing to zero release, is a kind of energy-saving and emission-reduction, the environment protection novel of turning waste into wealth.
The technical scheme that the present invention adopts is: this waste tin stripper recovery method is: waste tin stripper is got into heavy molten tin bath, open and stir, add 30% sodium hydroxide, control solution pH value 5-7 adds heavy tin acvator again, makes tin mud coagulation; Tin pug slurry is pumped into plate-and-frame filter press from heavy molten tin bath, carry out solid-liquid separation, the main stanniferous of filter residue and iron and little copper; Sell, filtrating is advanced the copper Winning cell, and electrodeposition obtains the high-purity compact metallic copper; The tail washings copper content of copper electrodeposition is less than 0.5g/L; Tail washings pumps into mixing system, and additional nitric acid and little additive, returns production line and uses.
In the technique scheme, the heavy tin acvator that adds heavy molten tin bath is a sodium sulphite, and add-on is the 20-40% of waste tin stripper volume.
In the technique scheme, the nitric acid that adds mixing system is the nitric acid of 30% concentration, and the additive of adding is Seignette salt or sodium-acetate; Both add the 10-20% that volume is a tail washings; By nitric acid, both sums of additive is 100%, and then wherein additive is 3-5%, and all the other are nitric acid.
Waste tin stripper recovery system of the present invention comprises heavy molten tin bath, flame filter press, copper Winning cell, allotment bucket, liquid storing barrel, is connected successively with hydro-pump through pipeline between them, and is equipped with power control system.
In the technique scheme; Described heavy molten tin bath has the waste tin stripper inlet, and heavy tin bath outlet is connected flame filter press through pipeline with hydro-pump, and flame filter press has scruff outlet and filtrate outlet; Filtrating is connected the copper Winning cell through pipeline with hydro-pump; The outlet of the tail washings of copper Winning cell is connected the allotment bucket through pipeline with hydro-pump, allotment barrel is passed through pipeline again and is connected liquid storing barrel with hydro-pump, and liquid storing barrel is connected with hydro-pump through pipeline and returns production line.
The present invention is directed to the shortcoming of prior art, proposed a kind of novel process of waste tin stripper recycle.The present invention lets 98% tin be deposited in Xi Nizhong with the form of metastannic acid and tindioxide through the pH value of control solution, and the solution of the post precipitation electrodeposition of switching on obtains the electro deposited copper of densification.Solution adjustment composition behind the decopper(ing) returns and moves back solder production, therefore; The invention solves waste water and efflux problem, contain metals such as a large amount of tin, copper, iron because of waste tin stripper, the present invention reclaims these valuable metals in the waste tin stripper; Waste water after reclaiming is through adjustment; Return production line and use, the water disposal of pollutants of environment is reduced to zero, good environmental protection.
Description of drawings:
Fig. 1 is a process flow sheet of the present invention;
Fig. 2 is the present device synoptic diagram.
The explanation of accompanying drawing mark:
1-sinks molten tin bath, and 2-flame filter press, 3-copper Winning cell, 4-are allocated bucket, 5-liquid storing barrel, 6-power control system.
Embodiment:
Referring to Fig. 1, waste tin stripper recovery method of the present invention is: waste tin stripper is got into heavy molten tin bath, open and stir, add 30% sodium hydroxide, control solution pH value 5-7 adds heavy tin acvator again, makes tin mud coagulation; Tin pug slurry is pumped into plate-and-frame filter press from heavy molten tin bath, carry out solid-liquid separation, the main stanniferous of filter residue and iron and little copper; Sell, filtrating is advanced the copper Winning cell, and electrodeposition obtains the high-purity compact metallic copper; The tail washings copper content of copper electrodeposition is less than 0.5g/L, and tail washings pumps into mixing system, and additional nitric acid and little additive; Return production line and use, the 20-40% that the heavy tin acvator that adds heavy molten tin bath is the waste tin stripper volume, the nitric acid that adds mixing system is the nitric acid of 30% concentration; The additive that adds is Seignette salt or sodium-acetate, and adding volume is the 10-20% of tail washings, and waste tin stripper recovery system of the present invention comprises heavy molten tin bath, flame filter press, copper Winning cell, allotment bucket, liquid storing barrel; Be connected successively with hydro-pump through pipeline between them, and be equipped with power control system, described heavy molten tin bath has the waste tin stripper inlet; Heavy tin bath outlet is connected flame filter press through pipeline with hydro-pump; Flame filter press has scruff outlet and filtrate outlet, and filtrating is connected the copper Winning cell through pipeline with hydro-pump, and the tail washings outlet of copper Winning cell is connected the allotment bucket through pipeline with hydro-pump; Allotment bucket is connected liquid storing barrel through pipeline with hydro-pump again, and liquid storing barrel is connected with hydro-pump through pipeline and returns production line.
Claims (5)
1. a waste tin stripper recovery method is characterized in that: waste tin stripper is got into heavy molten tin bath, open and stir, add 30% sodium hydroxide, control solution pH value 5-7, add heavy tin acvator again, make tin mud coagulation; Tin pug slurry is pumped into plate-and-frame filter press from heavy molten tin bath, carry out solid-liquid separation, the main stanniferous of filter residue and iron and little copper; Sell, filtrating is advanced the copper Winning cell, and electrodeposition obtains the high-purity compact metallic copper; The tail washings copper content of copper electrodeposition is less than 0.5g/L; Tail washings pumps into mixing system, and additional nitric acid and little additive, returns production line and uses.
2. waste tin stripper recovery method according to claim 1 is characterized in that: the 20-40% that the heavy tin acvator that adds heavy molten tin bath is the waste tin stripper volume.
3. waste tin stripper recovery method according to claim 1 is characterized in that: the nitric acid that adds mixing system is the nitric acid of 30% concentration, and the additive of adding is Seignette salt or sodium-acetate, and adding volume is the 10-20% of tail washings.
4. a waste tin stripper recovery system is characterized in that: comprise heavy molten tin bath, flame filter press, copper Winning cell, allotment bucket, liquid storing barrel, be connected successively with hydro-pump through pipeline between them, and be equipped with power control system.
5. waste tin stripper recovery system according to claim 4; It is characterized in that: described heavy molten tin bath has the waste tin stripper inlet; Heavy tin bath outlet is connected flame filter press through pipeline with hydro-pump; Flame filter press has scruff outlet and filtrate outlet, and filtrating is connected the copper Winning cell through pipeline with hydro-pump, and the tail washings outlet of copper Winning cell is connected the allotment bucket through pipeline with hydro-pump; Allotment bucket is connected liquid storing barrel through pipeline with hydro-pump again, and liquid storing barrel is connected with hydro-pump through pipeline and returns production line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110158661.3A CN102766883B (en) | 2011-06-14 | 2011-06-14 | Spent solder stripper recovery method and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110158661.3A CN102766883B (en) | 2011-06-14 | 2011-06-14 | Spent solder stripper recovery method and equipment |
Publications (2)
| Publication Number | Publication Date |
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| CN102766883A true CN102766883A (en) | 2012-11-07 |
| CN102766883B CN102766883B (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110158661.3A Expired - Fee Related CN102766883B (en) | 2011-06-14 | 2011-06-14 | Spent solder stripper recovery method and equipment |
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| CN (1) | CN102766883B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103482688A (en) * | 2013-09-25 | 2014-01-01 | 广东致卓精密金属科技有限公司 | Method for preparing stannic oxide from nitric acid spent solder stripper |
| CN105293454A (en) * | 2015-10-27 | 2016-02-03 | 盛隆资源再生（无锡）有限公司 | Method for preparing dilute nitric acid, sponge tin and polymeric aluminum through spent tin-fading liquid |
| CN106145463A (en) * | 2016-08-09 | 2016-11-23 | 江苏兴达钢帘线股份有限公司 | The processing method of a kind ofization tinning bronze alloy waste plating solution |
| CN107012467A (en) * | 2017-06-19 | 2017-08-04 | 四川绿源聚能环保科技有限责任公司 | A kind of apparatus system of tin removal waste liquor circular regeneration |
| CN107268007A (en) * | 2017-06-16 | 2017-10-20 | 四川绿源聚能环保科技有限责任公司 | A kind of method of tin removal waste liquor circular regeneration |
| CN108560001A (en) * | 2018-05-07 | 2018-09-21 | 昆山市新溢诚电子科技有限公司 | A kind of environment-friendly type stripping tin liquor cyclic utilization system and circulation utilization method |
| CN111320326A (en) * | 2020-03-12 | 2020-06-23 | 无锡中天固废处置有限公司 | Method for treating complex tin stripping waste liquid |
| CN112410792A (en) * | 2019-10-08 | 2021-02-26 | 叶涛 | PCB iron-free nitric acid type tin stripping water and regeneration and reuse method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1530466A (en) * | 2003-03-11 | 2004-09-22 | 湖南高奇实业有限公司 | Recovery of tin from waste liquid of tin and lead |
| CN101928958A (en) * | 2010-07-21 | 2010-12-29 | 北京科技大学 | Method and device for recovering metal tin from lead separated slag of copper anode slime |
| CN202080977U (en) * | 2011-06-14 | 2011-12-21 | 湖南万容科技有限公司 | Waste tin-stripping solution recovery plant |
-
2011
- 2011-06-14 CN CN201110158661.3A patent/CN102766883B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1530466A (en) * | 2003-03-11 | 2004-09-22 | 湖南高奇实业有限公司 | Recovery of tin from waste liquid of tin and lead |
| CN101928958A (en) * | 2010-07-21 | 2010-12-29 | 北京科技大学 | Method and device for recovering metal tin from lead separated slag of copper anode slime |
| CN202080977U (en) * | 2011-06-14 | 2011-12-21 | 湖南万容科技有限公司 | Waste tin-stripping solution recovery plant |
Non-Patent Citations (3)
| Title |
|---|
| K.SCOTT.ET.AL: ""Electrochemical recycling of tin, lead and copper from stripping solution in the manufacture of circuit boards", 《RESOURCES, CONSERVATION AND RECYCLING》 * |
| 杨志浩等: "废退锡液的循环利用技术研究进展", 《化学工程与装备》 * |
| 林坚等: "简单功能高分子体系在废退锡液再生", 《印制电路信息》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103482688A (en) * | 2013-09-25 | 2014-01-01 | 广东致卓精密金属科技有限公司 | Method for preparing stannic oxide from nitric acid spent solder stripper |
| CN105293454A (en) * | 2015-10-27 | 2016-02-03 | 盛隆资源再生（无锡）有限公司 | Method for preparing dilute nitric acid, sponge tin and polymeric aluminum through spent tin-fading liquid |
| CN106145463A (en) * | 2016-08-09 | 2016-11-23 | 江苏兴达钢帘线股份有限公司 | The processing method of a kind ofization tinning bronze alloy waste plating solution |
| CN107268007A (en) * | 2017-06-16 | 2017-10-20 | 四川绿源聚能环保科技有限责任公司 | A kind of method of tin removal waste liquor circular regeneration |
| CN107012467A (en) * | 2017-06-19 | 2017-08-04 | 四川绿源聚能环保科技有限责任公司 | A kind of apparatus system of tin removal waste liquor circular regeneration |
| CN108560001A (en) * | 2018-05-07 | 2018-09-21 | 昆山市新溢诚电子科技有限公司 | A kind of environment-friendly type stripping tin liquor cyclic utilization system and circulation utilization method |
| CN112410792A (en) * | 2019-10-08 | 2021-02-26 | 叶涛 | PCB iron-free nitric acid type tin stripping water and regeneration and reuse method thereof |
| CN111320326A (en) * | 2020-03-12 | 2020-06-23 | 无锡中天固废处置有限公司 | Method for treating complex tin stripping waste liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102766883B (en) | 2015-06-03 |
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