CN103088364B - A kind of recoverying and utilizing method of copper foil production wastewater - Google Patents
A kind of recoverying and utilizing method of copper foil production wastewater Download PDFInfo
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- CN103088364B CN103088364B CN201310048836.4A CN201310048836A CN103088364B CN 103088364 B CN103088364 B CN 103088364B CN 201310048836 A CN201310048836 A CN 201310048836A CN 103088364 B CN103088364 B CN 103088364B
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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 invention belongs to technical field of copper foil production, disclose a kind of recoverying and utilizing method of copper foil production wastewater.Copper foil production wastewater is concentrated into copper ion concentration at more than 1g/l, after concentrated, solution is as extraction feed liquid, add extraction agent and kerosene extracts, after extraction, load organic phases is as lean solution, and the sulphuric acid soln adding concentration 180-220g/L is stripped, and obtains enrichment electrolytic solution, using copper bar energising as anode and cathode, obtain finished product copper through electrolytic reaction; Wherein, described extraction agent is alkylbenzene oxime mixture, and extraction agent and kerosene form organic phase with mass ratio 1:4-6, and the volume ratio of organic phase and extraction feed liquid is 1-2:1, and the volume ratio of lean solution and sulphuric acid soln is 1-2:1.The present invention utilizes the copper in extraction and back extraction reaction enriching low-concentration copper foil production wastewater, and the technology of Cu in waste water is extracted in recycling electrolytic reaction, and extraction efficiency is high, day process waste water 120m
3, monthly electrowinning copper can reach 7-8 ton, and producing economic benefit has 500,000 yuan.
Description
Technical field
The invention belongs to technical field of copper foil production, be specifically related to a kind of recoverying and utilizing method of copper foil production wastewater.
Background technology
Copper Foil production technique has raw paper tinsel and surface treatment twice important procedure, creates a large amount of waste water in process of production.Copper containing lower concentration in waste water, utilizes the replacement(metathesis)reaction of displacement pool at first, and recycle the copper of lower concentration in waste water, the efficiency of recycling is low, deficiency in economic performance, can not meet the requirement of environmental protection.For this reason, urgently research and develop a kind of extraction efficiency high, the recovery method of environment protection can be had again in mind.
Summary of the invention
The object of the present invention is to provide a kind of extraction efficiency high, the recoverying and utilizing method of the copper foil production wastewater of environment protection can be had again in mind.
For achieving the above object, the technical scheme taked of the present invention is as follows:
A kind of recoverying and utilizing method of copper foil production wastewater: copper foil production wastewater is concentrated into copper ion concentration at more than 1g/l, after concentrated, solution is as extraction feed liquid, add extraction agent and kerosene extracts, after extraction, load organic phases is as lean solution, and the sulphuric acid soln adding concentration 180-220g/L is stripped, and obtains enrichment electrolytic solution, using copper bar energising as anode and cathode, obtain finished product copper through electrolytic reaction; Wherein, described extraction agent is alkylbenzene oxime mixture, and extraction agent and kerosene form organic phase with mass ratio 1:4-6, and the volume ratio of organic phase and extraction feed liquid is 1-2:1, and the volume ratio of lean solution and sulphuric acid soln is 1-2:1.
Further, the solution reuse after electrolytic reaction, in initial extraction feed liquid, repeats to recycle.
Further again, the remaining liquid after extraction, is discharged in displacement pool, utilizes the remaining copper in iron substitutional solution.
Beneficial effect of the present invention:
1, utilize the copper in extraction and back extraction reaction enriching low-concentration copper foil production wastewater, the technology of Cu in waste water is extracted in recycling electrolytic reaction, and extraction efficiency is high, and day process wastewater flow rate is large.Waste water after treatment, the content of copper obviously reduces, and is the clean new technology of efficient-clean-recycle, accomplishes both to have environment protection in mind, focus on resource reclaim again, environment protection and economic benefit, social benefit are organically combined.
2, after the present invention's application, day process waste water 120m
3, meet Production requirement completely, monthly electrowinning copper can reach 7-8 ton, and producing economic benefit has 500,000 yuan.Technique available protecting environment, reaches energy-saving and emission-reduction, green production requirement, is a worth promotion technology.
Accompanying drawing explanation
Fig. 1: present invention process schema.
Embodiment
A kind of recoverying and utilizing method of copper foil production wastewater, process flow sheet is as shown in Figure 1: Copper Foil is produced low concentration wastewater and concentrate for twice through water station, in raising solution, copper ion concentration is to more than 1g/l, after concentrated, solution is as extraction feed liquid, then (first time extraction allows a large amount of copper in organic phase extracting and enriching feed liquid through twice extraction to add extraction agent and kerosene, second time extraction is to extract remaining copper in extraction feed liquid further), in first time extraction and for the second time extraction process, utilize copper high-dissolvability in extraction agent, cupric ion is extracted from extraction feed liquid, cupric ion is transferred in the organic phase of extraction agent and kerosene formation, utilize organic phase and water different densities, baffle plate separating for several times technology separates the organic phase of supported copper ion.After twice extraction, load organic phases is as lean solution, the sulphuric acid soln adding concentration 200g/L stirs strips, again the high density cupric ion of organic phase and load is separated, be separated aqueous copper solution after organic phase through back extraction and form enrichment electrolytic solution, using copper bar as anode and cathode, logical upper direct current, under additional power source effect, allow cupric ion deposit on negative electrode, finally effectively extract the copper acquisition finished product copper of solution middle and high concentration through electrolytic reaction; Contain a small amount of copper in solution after electrolytic reaction, can get in initial extraction feed liquid with pump, copper in second extraction solution, forms an open closed cycle; After extraction, solution copper content is very low, is called remaining liquid, can be discharged in displacement pool, utilize remaining copper in iron substitutional solution, as much as possible extract, and reduces the wasting of resources, reaches environmental emission standard.Wherein, described extraction agent is alkylbenzene oxime mixture { the copper extractant LIX984N} that peaceful (Cognis) company of German section produces, extraction agent and kerosene form organic phase using mass ratio 1:4, and (extraction agent is as the solute of organic phase, kerosene is the solvent of organic phase), in first time extraction and reextraction process, the volume ratio of organic phase and extraction feed liquid is 1:1, and in stripping process, the volume ratio of lean solution and sulphuric acid soln is 2:1.
Utilize this new technology both to reach and extract lower concentration copper requirement in waste water, increase economic benefit, again can at utmost protection of the environment.In whole process, extraction agent and kerosene can recycle, and loss is low, save cost.
Below in removal process, each phase solution copper content, carry out measuring at laboratory titration assay method and contrast, after can observing extraction, in solution, copper content obviously reduces.
In table, the solution of extraction feed liquid-----copper foil production wastewater after water station concentrates for twice; The load organic phases of lean solution-----extraction feed liquid after twice extraction, the solution namely containing extraction agent; Enrichment electrolytic solution-----lean solution is separated the aqueous copper solution after organic phase through back extraction; Remaining liquid-----extraction feed liquid remains the aqueous solution containing trace copper after twice extraction.
From above Data Comparison, after extraction, in solution, the content of copper obviously reduces, and originally in solution, copper segregation gets up, and efficiency during raising electrolysis, can effectively extract copper in solution.
Claims (3)
1. the recoverying and utilizing method of a copper foil production wastewater, it is characterized in that: copper foil production wastewater is concentrated into copper ion concentration at more than 1g/L, after concentrated, solution is as extraction feed liquid, add extraction agent and kerosene extracts, after extraction, load organic phases is as lean solution, the sulphuric acid soln adding concentration 180-220g/L is stripped, obtain enrichment electrolytic solution, using copper bar energising as anode and cathode, obtain finished product copper through electrolytic reaction; Wherein, described extraction agent is copper extractant LIX984N, and extraction agent and kerosene form organic phase with mass ratio 1:4-6, and the volume ratio of organic phase and extraction feed liquid is 1-2:1, and the volume ratio of lean solution and sulphuric acid soln is 1-2:1.
2. the recoverying and utilizing method of copper foil production wastewater as claimed in claim 1, is characterized in that: the solution reuse after electrolytic reaction, in initial extraction feed liquid, repeats to recycle.
3. the recoverying and utilizing method of copper foil production wastewater as claimed in claim 1 or 2, is characterized in that: the remaining liquid after extraction, is discharged in displacement pool, utilizes the remaining copper in iron substitutional solution.
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| CN201310048836.4A CN103088364B (en) | 2013-02-07 | 2013-02-07 | A kind of recoverying and utilizing method of copper foil production wastewater |
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| CN103088364B true CN103088364B (en) | 2016-01-06 |
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| CN109293118A (en) * | 2018-11-23 | 2019-02-01 | 深圳市纯水号水处理科技有限公司 | Copper foil production wastewater recycles the corrosion-resistant evaporation technique of zero discharge of high-purity copper- |
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| US6702872B1 (en) * | 1999-07-08 | 2004-03-09 | Cognis Corporation | Processes for the recovery of copper from aqueous solutions containing nitrate ions |
| CN1904142A (en) * | 2006-07-08 | 2007-01-31 | 王万春 | Copper extraction method of etching waste liquid or low copper containing waste liquid |
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| JP2011144437A (en) * | 2010-01-18 | 2011-07-28 | Sumitomo Metal Mining Co Ltd | Method for separating and recovering copper from copper-containing iron sulfide |
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