CN1180099C - Method of recovering waste copper foil - Google Patents
Method of recovering waste copper foil Download PDFInfo
- Publication number
- CN1180099C CN1180099C CNB011368020A CN01136802A CN1180099C CN 1180099 C CN1180099 C CN 1180099C CN B011368020 A CNB011368020 A CN B011368020A CN 01136802 A CN01136802 A CN 01136802A CN 1180099 C CN1180099 C CN 1180099C
- Authority
- CN
- China
- Prior art keywords
- copper
- paper tinsel
- scrap paper
- copper foil
- bath
- Prior art date
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- Expired - Fee Related
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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
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a method for recovering waste copper foil, which comprises the following steps: a chemical displacement reaction is utilized, and cupric sulfate solution and the copper foil electrically plating at least one kind of heavy metal with oxidation electric potential higher than that of copper carry out an oxidation reducing displacement reaction; the copper foil is conveyed to a barrel groove holding the cupric sulfate solution for the chemical displacement reaction, and after the copper foil entrapped with a solution thin film after the reaction is cleaned by a water cleaning system, the copper foil is recovered. The copper foil can be recovered after the copper foil is cut into the copper foil with needed size. The method for recovering waste copper foil can lower the recovering expense of the copper foil and reduce environmental pollution.
Description
Technical field
The invention relates to a kind of recovery method of copper scrap paper tinsel, refer in particular to a kind of chemical replacement reaction that utilizes, reclaim the method for the copper scrap paper tinsel of electroplating at least a heavy metal with the solution that contains cupric ion.
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)]+[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 * 1,000l/m
3* 103g/l * 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 * 1,000l/m
3* 103g/l * 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＜traditional method 〉, but, again required copper cash of liquid making and sulfuric acid take but up to 1,548 thousand yuan/month＜traditional 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, it is that Copper Foil drop into is being given birth to before the paper tinsel dissolving tank reclaims, carried out a chemical replacement reaction treatment earlier, reach the reduction Copper Foil and directly give the purpose that heat is melted the required expensive expense that expends of processing.
Another object of the present invention provides a kind of recovery method of copper scrap paper tinsel, and it is that the waste liquid that is produced after copper scrap paper tinsel and the copper-bath reaction is done secondary recovery and utilization again, reaches the purpose that solves environmental issue.
The object of the present invention is achieved like this: a kind of recovery method of copper scrap paper tinsel is characterized in that: it comprises the steps:
Copper scrap paper tinsel input is contained the bucket groove of copper-bath, make heavy metal and the cupric ion in the copper-bath generation replacement(metathesis)reaction on the copper scrap paper tinsel, to remove heavy metal;
The copper scrap paper tinsel with the bucket groove in copper-bath reaction after, will the residual copper-bath that contains heavy metal thereon clean through water wash system; Copper scrap paper tinsel after washing is promptly recyclable.
This copper scrap paper tinsel is the big wide cut Copper Foil of wide cut greater than 600mm.Copper-bath in this barrel groove is to be provided by solution feeding system.The waste liquid that this water wash system produced is through concentration systems waste liquid to be separated into concentrated solution and washing water, and this concentration systems is evaporating pot device, permeable membrane device, distillation tower device or the tower apparatus that boils suddenly.This concentrated solution continues to refill in the solution tank groove.This washing water continues to be recycled to water wash system with the water that cleans Copper Foil.This copper scrap paper tinsel is cut into required size through the roller clipper earlier after washing, reclaim again.
The recovery method of another kind of copper scrap paper tinsel, it is characterized in that: it comprises the steps:
The copper scrap paper tinsel is inserted in the acidproof basket, hang in the bucket groove that contains copper-bath, make heavy metal and the cupric ion in the copper-bath on the copper scrap paper tinsel produce replacement(metathesis)reaction, to remove heavy metal with overhead traveling crane;
After treating that the copper scrap paper tinsel drains residual copper-bath on it, reclaimed again; This copper scrap paper tinsel is the little wide cut Copper Foil of wide cut less than 600mm.Copper-bath in this barrel groove is to be provided by solution feeding system.
Major advantage of the present invention is:
1, utilizes redox principle, before copper scrap paper tinsel input is given birth to the recovery of paper tinsel dissolving tank, earlier itself and copper-bath are reacted, utilize the principle,displacement of oxidizing potential difference, with the copper scrap paper tinsel with copper-bath and one or more oxidizing potentials heavy metal high than copper, by oxygenizement, in Copper Foil is moved to copper-bath; Cupric ion in the copper-bath is also shifted on the former copper scrap paper tinsel simultaneously at this moment, the copper scrap paper tinsel is after reacting with copper-bath, the reacted Copper Foil that to carry solution again secretly is through water wash system, with clean residual thereon contained heavy metal solution, and can be cut into required size and reclaimed.
2, the waste liquid that this water wash system produced, can be through the concentration systems of sealing and circulating cleaning, waste liquid is separated into concentrated solution and washing water, concentrated solution wherein is sustainable to be refilled in the solution tank groove, washing water and the sustainable water wash system that is supplemented to of water that cleans Copper Foil, and reclaim unnecessary high-quality water and use for processing procedure, so can keep water quality, do not have wastewater problem and take place.
Further specify below in conjunction with preferred embodiment and accompanying drawing.
Description of drawings
Fig. 1 is the schematic flow sheet of the big wide cut Copper Foil of recovery of the present invention.
Fig. 2 is the schematic flow sheet of the little wide cut Copper Foil of recovery of the present invention.
Embodiment
Consulting Figure 1 and Figure 2, is the schematic flow sheet that is respectively big wide cut Copper Foil of recovery of the present invention and little wide cut Copper Foil.The present invention provides a kind of recovery method of copper scrap paper tinsel, its required equipment comprises that a solution feeding system 20, two is equipped with bucket groove 21,22, a water wash system 30, a concentration systems 40, a roller clipper 50, the one acidproof basket 60 and the day car 70 of copper-bath, and its concrete steps are as follows:
(a) the copper scrap paper tinsel that the present invention reclaimed is divided into the big wide cut Copper Foil 10 of wide cut greater than 600mm, and wide cut is also inequality less than the reclaimer of 11 two kinds of copper scrap paper tinsels of little wide cut Copper Foil (ear material) of 600mm.
At first, as shown in Figure 1, big wide cut Copper Foil 10 is sent with driving motor or drive motor, via one contain copper-bath the bucket groove 21, the copper ion concentration that contains of its solution must be more than 5ppm, copper-bath reaction in heavy metal ion on the big wide cut Copper Foil 10 and the bucket groove 21, pass through redoxomorphism, free to copper-bath, be arranged in also free the adhering on big wide cut Copper Foil 10 surfaces of cupric ion of ortho-sulfuric acid copper solutions simultaneously, so far, great majority are fine copper on the big wide cut Copper Foil 10.
(b) continue through a water wash system 30 with the reacted big wide cut Copper Foil 10 of copper-bath, that is cleaned its remained on surface contains cupric ion and heavy metal ion solution; Waste liquid 31 after cleaning 32 arrives the concentration systems 40 that sealing and circulating is cleaned again by the road; And big wide cut Copper Foil 10 can be cut into after the suitable size through roller clipper 50, is reclaimed or stores.
(C) recovery method of little wide cut Copper Foil 11 as shown in Figure 2, is inserted it in openable acidproof basket 60 in bottom earlier, hangs in barrel groove 22 with overhead traveling crane 70, and reaction is changed in the redox of carrying out as hereinbefore; Because copper-bath and heavy metal solution residual on the little wide cut Copper Foil 11 only be a small amount of, will not reclaim for the economic benefit consideration, only treat that little wide cut Copper Foil 11 drains residual copper-bath on it voluntarily after, reclaimed again.
Water wash system 30 be one in order to clean on the big wide cut Copper Foil 10 the device of residual copper sulfate solution, since on the big wide cut Copper Foil 10 the residual copper-bath heavy metal ion that contains after replacement(metathesis)reaction to be produced, so before carrying out recycling step, must utilize pure water to be cleaned, avoid causing the quality that reclaims on the processing procedure bad.
Concentration systems 40 is evaporating pot device, permeable membrane device, distillation tower device or the tower apparatus that boils suddenly, can the solution of the variant composition in the same liquid phase will be had, by physical properties differences such as boiling point, vapour pressure and molecular weight sizes, give individual separation with fractionation and mode such as centrifugal; So waste liquid 31, is separated into concentrated solution 41 and washing water 42 two portions through these concentration systems 40 after separatings; The composition of the washing water 42 after concentrating is near the quality of pure water, so can be recycled to former water wash system 30 again; What washed out contains cupric ion and part heavy metal ion solution, concentration of heavy metal ion in its solution does not reach before certain standard, its solution still has the ability with big wide cut Copper Foil 10 reactions, do not cause big wide cut Copper Foil 10 can't disengage heavy metal ion on it, treat that heavy metal ion arrives after the finite concentration, discharged again and done wastewater treatment, replenished new copper-bath by solution feeding system 20 in addition, so still recyclable to bucket groove 21 or 22.
Above-mentioned solution feeding system 20 is large-scale dissolving tanks, can via this solution feeding system 20 solution be delivered to barrel groove 21,22 respectively, in order to the running of recovery operation for behind the copper-bath that this recovery method utilized in collecting factory.
Reaction principle of the present invention is as follows in laboratory test results:
Get 1000 milliliters of waste liquids and the chemical replacement of copper scrap paper tinsel reaction, ending to reaction is to judge appearance color, its experimental result such as table 1 with interior eye.
Table 1
| Cu g/l | H 2SO 4 g/l | Zn ppm | Copper Foil weight g | |
| Before the reaction | 13.41 | 25 | 0 | 75.993 |
| After the reaction | 1.22 | 0 | 295700 | 75.015 |
Reaction formula is:
, speed of reaction is 5 seconds.
The recovery method of copper scrap paper tinsel of the present invention and traditional method are relatively, can learn: there is no obvious loss because zine ion is separated out with cupric ion displacement back quality, and before the copper ion concentration reaction is 13.41g/l, if with 5 seconds reaction times be benchmark, then working as copper ion concentration is that 1.22g/l is the reaction threshold value, so every month required waste liquid is 116m
3/ month.
＜estimation one〉suppose that copper scrap paper tinsel zine ion amount is 1%:
Reaction formula is:
G/l * the 65.38/63.55 of 145 tons/month * 1000kg/ ton * 10009/kg * 1%[(13.41-1.22)] * m
3/ 1000l=116m
3/ month (every month required waste liquid),
This waste liquid all imports the waste water field and makes mud (about 9.67 tons/month, 77.4 thousand yuan/month of the outer processing costss of mud committee), and required master/coagulant aids expense is about 12.2 thousand yuan/month.
＜estimation two 〉
1, zinc mud expense: [(13400) ppm/1000g/kg * 4.61kg zinc mud/kgZn+6.5kg/0.3] * m
3/ 1000l * 116m
3/ the moon * 8,000 yuan/m
3=77.4 thousand yuan/month;
2, main agent expense: the 116m that coagulates
3/ the moon * 6kg/m
3Thousand yuan/month of water * 5 yuan/kg=3.5.
3, coagulant aids expense: 116m
3/ the moon * 0.5kg/m
3Thousand yuan/month of water * 150 yuan/kg=8.7.
Add up to zinc mud and master/coagulant aids expense: 89.6 thousand yuan/month.
6,000 thousand yuan of this construction investment equipment hypothesis, then every month depreciation funds is 72,000 yuan/month (6,000 thousand yuan/7 years/December), maintenance charge is 7,000 yuan/month (6,000 thousand yuan * 1.4%/December); So can save 1,069 thousand yuan/month in every month; Year benefit: 12,832 thousand yuan/year, payback period is 5.6 months.
As from the foregoing, the recovery method of copper scrap paper tinsel of the present invention can significantly lower the expense that heavy metal is handled required consumption; By the recovery method of copper scrap paper tinsel of the present invention, have following advantage at least:
1, saves and directly to give heat and melt the required expensive expense that expends of handling.
2, employed copper-bath in the program can directly be imported by the waste liquid relief outlet of other factory building of on-site, does not need to prepare separately or buy, and can fully reach the effect that resource reclaims.
3, the waste liquid of the generation of the water wash system in the program, also can be separated into two through enrichment step can be for the renewable resource of recycling, so also do not need to add in addition the water of water wash system in the process.
In sum, the present invention really can reach the application target of expection, overcomes the shortcoming of traditional method, has novelty and creativeness.
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 in like manner all include within protection scope of the present invention.
Claims (6)
1, a kind of recovery method of copper scrap paper tinsel, it is exclusively used in the removal operation of Copper Foil factory to heavy metal in the copper scrap paper tinsel, it is characterized in that it comprises the steps:
Copper scrap paper tinsel input is contained the bucket groove of copper-bath, make heavy metal and the cupric ion in the copper-bath generation replacement(metathesis)reaction on the copper scrap paper tinsel, to remove heavy metal;
The copper scrap paper tinsel with the bucket groove in copper-bath reaction after, will the residual copper-bath that contains heavy metal thereon clean through water wash system; Copper scrap paper tinsel after washing is promptly recyclable;
The waste liquid that this water wash system produced is through concentration systems waste liquid to be separated into concentrated solution and washing water; This concentration systems is evaporating pot device, permeable membrane device, distillation tower device or the tower apparatus that boils suddenly; This concentrated solution continues to refill in the solution tank groove; This washing water continues to be recycled to water wash system with the water that cleans Copper Foil.
2, the recovery method of copper scrap paper tinsel according to claim 1 is characterized in that: this copper scrap paper tinsel is the big wide cut Copper Foil of wide cut greater than 600mm.
3, the recovery method of copper scrap paper tinsel according to claim 1 is characterized in that: the copper-bath in this barrel groove is to be provided by solution feeding system.
4, the recovery method of copper scrap paper tinsel according to claim 1 is characterized in that: this copper scrap paper tinsel is cut into required size through the roller clipper earlier after washing, reclaim again.
5, a kind of recovery method of copper scrap paper tinsel, it is exclusively used in the removal operation of Copper Foil factory to heavy metal in the copper scrap paper tinsel, it is characterized in that it comprises the steps:
The copper scrap paper tinsel is inserted in the acidproof basket, hang in the bucket groove that contains copper-bath, make heavy metal and the cupric ion in the copper-bath on the copper scrap paper tinsel produce replacement(metathesis)reaction, to remove heavy metal with overhead traveling crane;
After treating that the copper scrap paper tinsel drains residual copper-bath on it, reclaimed again; This copper scrap paper tinsel is the little wide cut Copper Foil of wide cut less than 600mm.
6, the recovery method of copper scrap paper tinsel according to claim 5 is characterized in that: the copper-bath in this barrel groove is to be provided by solution feeding system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011368020A CN1180099C (en) | 2001-10-23 | 2001-10-23 | Method of recovering waste copper foil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011368020A CN1180099C (en) | 2001-10-23 | 2001-10-23 | Method of recovering waste copper foil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1414124A CN1414124A (en) | 2003-04-30 |
| CN1180099C true CN1180099C (en) | 2004-12-15 |
Family
ID=4673929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011368020A Expired - Fee Related CN1180099C (en) | 2001-10-23 | 2001-10-23 | Method of recovering waste copper foil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1180099C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313331B (en) * | 2014-09-28 | 2016-08-24 | 江苏中容铜业有限公司 | A kind of method reclaiming copper junk |
-
2001
- 2001-10-23 CN CNB011368020A patent/CN1180099C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1414124A (en) | 2003-04-30 |
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