CN1195880C - Method of recovering waste copper foil - Google Patents
Method of recovering waste copper foil Download PDFInfo
- Publication number
- CN1195880C CN1195880C CNB011368012A CN01136801A CN1195880C CN 1195880 C CN1195880 C CN 1195880C CN B011368012 A CNB011368012 A CN B011368012A CN 01136801 A CN01136801 A CN 01136801A CN 1195880 C CN1195880 C CN 1195880C
- Authority
- CN
- China
- Prior art keywords
- copper
- paper tinsel
- scrap paper
- bath
- copper scrap
- 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.)
- Expired - Fee Related
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Classifications
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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
- Y02P10/20—Recycling
Abstract
The present invention relates to a method for recovering a waste copper foil, which uses solution comprising sulfuric acid to recover the waste copper foil electrically plating one kind or more than one kind of heavy metal by chemical dissolution and crystallization purification. The method comprises the following steps: the waste copper foil is dissolved by the sulfuric acid solution so as to generate cupric sulfate solution; after the concentration of the cupric sulfate solution is stabilized, the cupric sulfate solution is crystallized and is isolated into the two parts of crystallization and mother liquid, and at the moment, the heavy metal on the waste copper foil is removed to the mother liquid; the crystallization and the mother liquid are isolated by washing by clean water; and obtained cupric sulfate crystallization is conveyed to an electric plating groove and is dissolved so as to recover the copper foil. The method for recovering a waste copper foil can lower the expense for recovering the copper foil.
Description
Technical field
The invention relates to the method that a kind of copper scrap paper tinsel reclaims, refer in particular to a kind of chemical dissolution, crystallization purifying, to contain the method that vitriolic solution reclaims the copper scrap paper tinsel of electroplating one or more heavy metals.
Background technology
In general printed circuit board industry, be evenly equipped with Copper Foil in circuit board surface usually, for the usefulness of current signal circulation; And factory all can be reclaimed cloth Copper Foil thereon usually for its bad circuit card of producing because of the mistake on the processing procedure, careless mistake or other factors, to save the cost expenditure.
At present general Copper Foil factory reclaims the copper scrap paper tinsel two kinds of traditional methods.
1, one of traditional method is that recovery re-used after the outer heat of committee was melted processing.Committee is outer melts copper scrap paper tinsel input heat in the groove, after treating its thawing and separating the heavy metal that is wherein contained, gives again casting mold, processing again and recycling.Its major defect is:
Because the expense costliness of the required consumption of separable programming of heavy metal, on the program of integral body, there is not economic worth, listing the funds of the required consumption of this processing method below adjusts: suppose 145 tons/month of the outer treatment capacity average out to of present copper scrap paper tinsel committee of certain factory, processing costs is 8.54 thousand yuan/ton, then every month on average about 1,238 thousand yuan/month of outer handling of committee.
2, two of traditional method is that the copper scrap paper tinsel is directly dropped into the material dissolution groove, and recovery re-uses.Its major defect is:
Because the copper scrap paper tinsel contains heavy metal, as direct input material dissolution groove, can cause other heavy metal to separate out, when these heavy metal concentrations of separating out are above above finite concentration (as 6g/l), the solubleness of system can descend, and causes a large amount of crystallization of copper sulfate in the material dissolution groove, and influences the stability of processing procedure and the quality of product, so need material dissolution groove plating bath to be substituted liquid making again again.Listing the funds of the required consumption of liquid making again below adjusts: suppose that certain factory has four production lines (production line 1-production line 4) at present, then the required costimating of liquid making is as follows again:
One, each line plating bath total amount (liquid level 100%=222m
3):
Production line 1:[222m
3* 42% (dissolving tank) 1+[41m
3(strainer)]+[9m
3(medial launder)]+[10m
3(board) * 6]+[4m
3(pipeline)=208m
3/ production line 1;
Production line 2:[222m
3* 42% (dissolving tank)]+[41m
3(strainer)]+[9m
3(medial launder)]+[10m
3(board) * 6]+[4m
3(pipeline)]=208m
3/ production line 2;
Production line 3:[222m
3* 49% (dissolving tank)]+[41m
3(strainer)]+[9m
3(medial launder)]+[10m
3(board) * 6]+[4m
3(pipeline)]=223m
3/ production line 3;
Production line 4:[222m
3* 52% (dissolving tank)]+[21m
3(strainer)]+[9m
3(medial launder)]+[10m
3(board) * 4]+[4m
3(pipeline)]=189m
3/ production line 4;
Total plating bath amount: production line 1+ production line 2+ production line 3+ production line 4=828m
3
With 145 tons of copper scrap paper tinsels estimation in every month, cause (145 tons * 1% * 1000 kilogram/ton/828m of the lifting of 1.75g/l concentration approximately
3), with a truck 20m
3Estimation, need 12 train numbers could be with concentration dilution to the reasonable standard value approximately.
Two, plating bath is taken out the copper and the sulfuric acid expense of required liquid making:
1, copper (unit price: 61 yuan/kg): 20m
3Train number * 12 train numbers * 1,0001/m
3* 103g/1 * 1kg/1,000g * 61 yuan/kg=1,508,000 yuan;
2, sulfuric acid (unit price: 1.64 yuan/kg): 20m
3Train number * 12 train numbers * 1,0001/m
3* 103g/1 * 1kg/1, thousand yuan of 000g * 1.64 yuan/kg=40.5;
Copper and sulfuric acid cost are: 1, and 508+40.5=1,548,000 yuan/month.
By above estimation as can be known, two of traditional method directly drops into living paper tinsel dissolving tank with the copper scrap paper tinsel, can save the outer processing costs 1 of committee, one of 238,000 yuan/month＜method 〉, but, again required copper cash of liquid making and sulfuric acid take but up to 1,548 thousand yuan/month＜method two.So two of traditional method directly drops into dissolving tank with the copper scrap paper tinsel and does not meet economic benefit.
As from the foregoing, traditional copper scrap paper tinsel recovery method on reality is used, obviously has the inconvenience shortcoming existence higher with cost, must be improved.
Summary of the invention
At above-mentioned defective, inventor spy concentrates on studies, and cooperates the utilization of scientific principle, creates technical scheme of the present invention finally.
Main purpose of the present invention provides a kind of recovery method of copper scrap paper tinsel, and it is that Copper Foil drop into is being given birth to before the paper tinsel dissolving tank reclaims, and is carried out the reaction treatment of a chemical dissolution, crystallization purifying earlier, reaches and reduces the purpose that reclaims the Copper Foil expense.
The object of the present invention is achieved like this: the method that a kind of copper scrap paper tinsel reclaims is characterized in that it comprises the steps:
At first, copper scrap paper tinsel and sulphuric acid soln reaction are formed copper-bath, and treat that this copper-bath is stable; Copper-bath is separated with moisture, and copper-bath is cooled to than lower temperature of saturation before separating; With the copper-bath crystallization, form cupric sulphate crystal and mother liquor simultaneously again, cupric sulphate crystal and mother liquor are separated, and with the flushing with clean water cupric sulphate crystal; Cupric sulphate crystal is dissolved with water or electroplate liquid, to finish recycling step.
The formed copper-bath of this copper scrap paper tinsel and sulphuric acid soln reaction back places temporary bucket one, and is solution-stabilized to treat this.This copper-bath is to isolate moisture by a concentration systems, and this concentration systems is evaporating pot device, permeable membrane device, distillation tower device or the tower apparatus that boils suddenly.The moisture of this copper-bath gained after separating is as the usefulness of cleaning the mother liquor on the cupric sulphate crystal.This moisture places temporary bucket two, with the usefulness of the mother liquor on the cupric sulphate crystal to be cleaned.This copper-bath is lowered the temperature through cooling system with after moisture separates.This copper-bath gives crystallization through crystal system, and this crystal system is a crystallizer.This cupric sulphate crystal separates it through separation system with mother liquor, this separation system is vacuum separation machine, separating centrifuge or pressure dewatering machine.This cupric sulphate crystal is to loop back sulphuric acid soln by a vapor system through separating the mother liquor of back gained.This mother liquor is to place temporary bucket three, with to be recycled time sulphuric acid soln.
Method of the present invention is to utilize chemical dissolution, crystallization purifying to react to reach, at first, the copper scrap paper tinsel is dissolved with sulphuric acid soln, again through a concentration systems, the copper-bath behind the dissolving copper scrap paper tinsel is concentrated into a steady concentration after, through a crystal system with the cupric sulphate crystal in the solution, that is be separated into crystallization and mother liquor two portions, at this moment, oneself moves to mother liquor the heavy metal on the copper scrap paper tinsel, by a separation system crystallization is separated with mother liquor again; In view of the above, mother liquor is recyclable to be used to employed interior continuation of dissolving tank that contains sulphuric acid soln of original dissolving copper scrap paper tinsel, and the crystallization of copper sulfate then can be delivered in the plating tank and dissolve, to finish the step of recovery.
Further specify below in conjunction with preferred embodiment and accompanying drawing.
Description of drawings
Fig. 1 is a method flow synoptic diagram of the present invention.
Embodiment
Consult shown in Figure 1, the method that copper scrap paper tinsel of the present invention reclaims, its required equipment comprises a dissolving tank 20, a concentration systems 30, a cooling system 40, a crystal system 50, a separation system 60, a vapor system 70 (STM), temporary bucket 1, temporary bucket 2 31 and temporary bucket 3 61, and its detailed step is as follows:
(a) at first, copper scrap paper tinsel 10 input is contained in the dissolving tank 20 of sulphuric acid soln to produce solubilizing reaction, the sulfuric acid concentration in this solution must be 0～57%, and temperature is reacted under the situation of aerobic below 100 ℃; During copper-bath to be formed, its reaction back concentration of copper sulfate must be at 0-64%, so.Can insert in the temporary bucket 1, and treat solution-stabilized after, carry out next step again;
(b) this concentration systems 30 is evaporating pot device, permeable membrane device, distillation tower device or the tower apparatus that boils suddenly; And in concentration systems 30, by the different physical properties of mixture mid-boiling point, copper-bath and moisture are separated, make it stable with the concentration of controlling copper-bath, the moisture of being separated can import in the temporary bucket 2 31 in advance.
(c) when copper-bath continues temperature of saturation lower before cooling system 40 is cooled to separation, can prepare to carry out cupric sulphate crystal.
(d) this crystal system 50 can be crystallizer; In crystal system 50, the product of step (c) is separated into cupric sulphate crystal and mother liquor, at this moment, oneself moves to the heavy metal ion on the copper scrap paper tinsel 10 in the mother liquor.
(e) this separation system 60 is vacuum separation machine, separating centrifuge or pressure dewatering machine; In separation system 60, the cupric sulphate crystal that step (d) is produced separates with mother liquor, places the clear water of temporary bucket 2 31 or the clear water that adds with step (b) simultaneously, or both mixing waters, and mother liquor residual in the crystallization is cleaned; At this moment, contain can the guide people temporary bucket 3 61 of mother liquor of heavy metal ion, pass through the processing of vapor system 70 again after, the dissolving tank 20 of capable of circulation time step (a) is used as the solution (or making other purposes) of dissolving copper scrap paper tinsel 10, so do not have secondary pollution problem.
(f) last, cupric sulphate crystal is sent in the plating tank, and made the cupric sulphate crystal dissolving, to finish recycling step by water in the plating tank or electroplate liquid.
In step (e), though this mother liquor contains copper-bath and part heavy metal ion solution that copper scrap paper tinsel 10 is washed out through concentration systems 30, before yet the concentration of heavy metal ion in the solution does not reach necessarily, its solution still has the ability with 10 reactions of copper scrap paper tinsel, do not cause copper scrap paper tinsel 10 can't disengage heavy metal ion on it, treat that heavy metal ion arrives after the finite concentration, discharged again and do wastewater treatment, or replenish new sulphuric acid soln separately.
With the reclaimer that this method is carried out, its cost analysis is as follows:
(1) as every month 145 tons of copper scrap paper tinsels are dropped into dissolving tank, utilizes crystal system that the copper metallic crystal is removed again, need the pure water expense to be approximately: 0.32 thousand yuan of/month (6.4m
3Pure water/the moon * 50 yuan/m
3);
The sulfuric acid and the Copper Foil expense of loss are about respectively: 5.6 thousand yuan/month (3.4 tons/month * I.64 thousand yuan) and 134.2 thousand yuan/month (2.2 tons/month * 61 yuan/kg);
The liquid waste disposal expense that causes is 42,000 yuan/month (12 tons/month * 3.5 thousand yuan/ton).
(2) water coolant and the vapor system expense that were consumed in every month of heavy metal crystal system is respectively 10.4 thousand yuan/month and 85,000 yuan/month.
" specifically estimating as follows "
* recirculated water demand: 145 tons/month/(30 days/month * 24Hr/ day * 0.5)/(0.475-0.285)=2.11m
3/ Hr.
* circulation fluid demand: 2.11m
3/ Hr/ (1-0.475)=4.02m
3/ Hr.
* water coolant demand: 4.02 * 1000kg * 1000g * (70-40) cal/g-℃/5 ℃/1000/1000=24m
3/ Hr.
* vapor system demand: 4.02 * 1000 tons * 1000g * (70-40) cal/g-℃/1000/510 (latent heat)=236kg/Hr
* water coolant expense: 24m
3/ Hr * 0.6 yuan/m
3* 30 days/month * 24Hr/ day=10.4 thousand yuan/month.
* vapor system expense: 0.236 ton/Hr * 500 yuan/m
3* 30 days/month * 24Hr/ day=85,000 yuan/month.
(3) construction investment equipment hypothesis is 8,000 thousand yuan, and then every month depreciation funds is 95,000 yuan/month (8,000 thousand yuan/7 years/December); Maintenance charge is 9.3 thousand yuan/month (8,000 thousand yuan * I.4%/December).
In sum, can save 856,000 yuan/month in every month, a year benefit is 10,272 thousand yuan/year, and payback period is 9.3 months.
As from the foregoing, the method for copper scrap paper tinsel recovery of the present invention can significantly lower the expense that the heavy metal processing is consumed.The method that copper scrap paper tinsel of the present invention reclaims has following advantage at least:
1, saving the copper scrap paper tinsel directly gives heat and melts the spent expensive expense of handling.
2, the moisture that concentration systems discharged in the program can be directed at separation system in addition and be used, and so can fully reach the effect that resource reclaims.
3, the mother liquor that separation system is discharged in the program also can be directed in the dissolving tank in addition and is used, can be for the renewable resource of recycling.
In sum, the present invention really can reach the application target of expection, overcomes the defective of conventional art, has novelty, creativeness and practicality.
The above only is preferred embodiment of the present invention, and modification or variation that all utilizations specification sheets of the present invention and graphic content are done all include within protection scope of the present invention.
Claims (9)
1, a kind of method of copper scrap paper tinsel recovery, described copper scrap paper tinsel is the copper scrap paper tinsel that contains one or more heavy metal, it is characterized in that it comprises the steps:
(1) make the reaction of Copper Foil in the copper scrap paper tinsel and sulphuric acid soln form copper-bath, and the impurity heavy metal on the Copper Foil is thereupon in the vitriolization, and treats that this copper-bath is stable;
(2) copper-bath is separated with moisture, and copper-bath is cooled to than lower temperature of saturation before separating;
(3) again with the copper-bath crystallization, form simultaneously and separate cupric sulphate crystal and mother liquor, the impurity heavy-metal movement in the former copper scrap paper tinsel is not separated out with cupric sulphate crystal to mother liquor, and with the flushing with clean water cupric sulphate crystal;
(4) cupric sulphate crystal is dissolved with water or electroplate liquid, to finish recycling step;
The moisture of copper-bath gained after separating of this step (two) is as the usefulness of cleaning the mother liquor on the cupric sulphate crystal; Or place temporary bucket two, with the usefulness of the mother liquor on the cupric sulphate crystal to be cleaned.
2, the method for copper scrap paper tinsel recovery according to claim 1 is characterized in that: the formed copper-bath of copper scrap paper tinsel of this step () and sulphuric acid soln reaction back places temporary bucket one, stablizes to treat this copper-bath.
3, the method for copper scrap paper tinsel recovery according to claim 1, it is characterized in that: the copper-bath of this step (two) is to isolate moisture by a concentration systems, this concentration systems is evaporating pot device, permeable membrane device, distillation tower device or the tower apparatus that boils suddenly.
4, the method that reclaims of copper scrap paper tinsel according to claim 1 is characterized in that: the copper-bath of this step (two) is lowered the temperature through cooling system with after moisture separates.
5, the method for copper scrap paper tinsel recovery according to claim 1, it is characterized in that: the copper-bath of this step (three) gives crystallization through crystal system, and this crystal system is a crystallizer.
6, the method for copper scrap paper tinsel recovery according to claim 1, it is characterized in that: the cupric sulphate crystal of this step (three) separates it through separation system with mother liquor, this separation system is vacuum separation machine, separating centrifuge or pressure dewatering machine.
7, the method for copper scrap paper tinsel recovery according to claim 1, it is characterized in that: the cupric sulphate crystal of this step (three) is to loop back sulphuric acid soln by a vapor system through separating the mother liquor of back gained.
8, the method for copper scrap paper tinsel recovery according to claim 1 is characterized in that: the mother liquor of this step (three) is to place temporary bucket three, with to be recycled time sulphuric acid soln.
9, the method that reclaims of copper scrap paper tinsel according to claim 1, it is exclusively used in the Copper Foil factory processing to the copper scrap paper tinsel of the heavy metal that contains one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011368012A CN1195880C (en) | 2001-10-23 | 2001-10-23 | Method of recovering waste copper foil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011368012A CN1195880C (en) | 2001-10-23 | 2001-10-23 | Method of recovering waste copper foil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1414123A CN1414123A (en) | 2003-04-30 |
| CN1195880C true CN1195880C (en) | 2005-04-06 |
Family
ID=4673928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011368012A Expired - Fee Related CN1195880C (en) | 2001-10-23 | 2001-10-23 | Method of recovering waste copper foil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1195880C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618722B (en) * | 2012-03-27 | 2014-04-09 | 武振龙 | Clean recovery production method of copper-containing waste |
| CN103496731A (en) * | 2013-09-11 | 2014-01-08 | 江西新金叶实业有限公司 | Method for preparing nanometer copper oxide by using copper scrap |
| CN107321271A (en) * | 2017-08-07 | 2017-11-07 | 江苏夏博士节能工程股份有限公司 | A kind of useless circuit board production copper sulphate device and its technique |
| CN115259208A (en) * | 2022-06-30 | 2022-11-01 | 金川集团股份有限公司 | Process for producing anhydrous copper sulfate by spray pyrolysis of high-purity leaching solution of waste copper foil |
| CN114990645B (en) * | 2022-06-30 | 2024-04-16 | 深圳惠科新材料股份有限公司 | Copper sulfate crystal recovery device and method |
-
2001
- 2001-10-23 CN CNB011368012A patent/CN1195880C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1414123A (en) | 2003-04-30 |
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Granted publication date: 20050406 Termination date: 20161023 |
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