CN106319564A - Metallic copper, method for treating wastewater containing copper ions and method for electrolyzing metal ions - Google Patents
Metallic copper, method for treating wastewater containing copper ions and method for electrolyzing metal ions Download PDFInfo
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- CN106319564A CN106319564A CN201610822080.8A CN201610822080A CN106319564A CN 106319564 A CN106319564 A CN 106319564A CN 201610822080 A CN201610822080 A CN 201610822080A CN 106319564 A CN106319564 A CN 106319564A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/12—Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/06—Operating or servicing
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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
The invention relates to the field of wastewater treatment and particularly provides metallic copper, a method for treating wastewater containing copper ions and a method for electrolyzing metal ions. The method for treating the wastewater containing the copper ions comprises the following steps of 1, conducting solid-liquid separation on the wastewater containing the copper ions; and 2, introducing the wastewater which contains the copper ions and is obtained after solid-liquid separation into an electrolytic tank, and making the wastewater flow in a rotary manner in the electrolytic tank at the flow speed of 1000-15000 liter/hour, wherein the metallic copper can be gradually separated out of a cathode under the action of an electric field formed at the electric current density of 50-1200 A/m<2>. The method has the beneficial effects of being simple in technology, short in technological process, low in cost, high in treatment efficiency and wide in treatment concentration range.
Description
Technical field
The present invention relates to sewage treatment area, in particular to a kind of metallic copper, the method for Treatment of Copper ion waste water
And the method for electrolytic metal ion.
Background technology
Electrolysis is the process that electric current causes chemical change by material, and chemical change is that material loses or obtains electronics
The process of (aoxidize or reduce).Electrolytic process is carried out in electrolyzer, electrolyzer be by be immersed in respectively containing positive and negative from
Two electrodes of yin, yang in the solution of son are constituted, and electric current flows to negative electrode (negative electrode), and cation positively charged in solution migrates
To negative electrode, and be combined with electronics, become neutral element or molecule；Electronegative anion moves to another electrode (sun
Pole), provide electronics, become neutral element or molecule.
The method of traditional electrolyte metal ion is to be passed through in electrolyzer by the solution containing metal ion, leads to two electrodes
Electricity can realize the electrolysis of metal ion.But this conventional electrolytic methods can be affected by multiple situation in electrolytic process, as
Ion concentration, ion rheobase, anode and cathode current potential, concentration polarization, pH value, overvoltage etc., due to depositing of above-mentioned rough sledding
Asking of metal ion electrolysis can not be completed in the case of wide concentration range and high current density making conventional electrolytic methods
Topic.
Chip factory's copper sulfate waste water is a kind of highly acidity, low-concentration sulfuric acid copper waste water, and the process technique of this waste water is most
It is the method using alkaline matter to adjust pH value, the copper in waste water is precipitated into curpic carbonate precipitation or Copper hydrate precipitation, passed through
Filter is further processed after separating again.In waste water, acidity is higher, can be greatly enhanced the consumption of alkaline matter, cause waste water
Processing cost remains high, and the curpic carbonate of output precipitates during being processed further and easily causes secondary pollution,
Process for waste water and bring great hidden danger.Therefore, this type of mode is used to process highly acidity, low-concentration sulfuric acid copper waste water, not only labor
Fatigue resistance compared with big, working environment is poor, and cost of labor is high, metal recovery rate is relatively low.
In view of this, the special proposition present invention.
Summary of the invention
The first object of the present invention is a kind of method providing electrolytic metal ion, and the method has that technique is simple, becomes
This low and that efficiency is high advantage.
The second object of the present invention is a kind of method providing Treatment of Copper ion waste water, and the method has technique letter
Advantage single, that technological process is short, low cost, treatment effeciency high and concentration for the treatment of scope is wide.
The third object of the present invention is to provide a kind of metallic copper, and this metallic copper uses above-mentioned Treatment of Copper ion waste water
Method prepares, and the metallic copper purity using said method to be prepared from is high, and preparation efficiency is high, and can be prepared as required
Powder body or sheet material.
In order to realize the above-mentioned purpose of the present invention, spy by the following technical solutions:
A kind of method that the invention provides electrolytic metal ion, comprises the following steps:
S1, provide metal ion solution: described solution contains the metal ion that at least two is different, different metal from
The theoretical deposition potential of son is different；
S2, described solution is passed through in electrolysis bath, and pressurization quickly flowing in electrolysis bath, under electric field action,
Gradually there is the metal of the highest theoretical deposition potential in negative electrode precipitation.
CSED electrolysis tech, is that one utilizes solution movement supercharging flowing working method, valuable metal is carried out selectivity
The new technique of electrolysis (electrodeposition).CSED electrolysis tech is difference based on each metal ion theory deposition potential, is i.e. intended to be extracted
As long as metal have bigger potential difference, the then metal that current potential is higher to be prone to excellent at negative electrode with other metal ions in solution system
First separate out, by high speed rotating liquid stream, eliminate the unfavorable factor to electrolysis, it is to avoid traditional electrolyte (electrodeposition) mode is in electrolysis
During by many factors (ion concentration, ion rheobase, anode and cathode current potential, concentration polarization, pH value, overvoltage etc.) affect
Rough sledding, high-quality metal product can be produced by simple technical conditions, the most above-mentioned electrolytic method can be complete
Become conventional electrolytic methods can not complete wide concentration range (from 0. more than zero grams per liter to hundreds of grams per liter), high current density
(400A/m2Metal ion electrolysis in the case of above), and produce different types of metal product (sheet material or powder body).
It should be noted that above-mentioned quick flowing refers to that flow velocity is more than 1000 ls/h.
The method of above-mentioned electrolytic metal ion can be used in processing waste water, manages containing at least two in described waste water
The metal that opinion deposition potential is different, is directly passed through waste water in electrolysis bath and is electrolysed, and said method is particularly suitable at sewage
The selective electrolysis (electrodeposition) of low concentration, complicated solution is separated and purifies by reason industry, can effectively solve at other sewage
The problem that reason mode pollutes environment, waste water remove impurity difficulty is big, technological process length, production cost are high and overall efficiency is low.
A kind of method that present invention also offers Treatment of Copper ion waste water, comprises the following steps:
S1, by copper ions waste water solid separate；
S2, the copper ions waste water after solid-liquid separation is passed through in electrolysis bath, and with the flow velocity of 1000-15000 l/h
Pressurization quickly flowing in electrolysis bath, at 50-1200A/m2Electric current density formed electric field action under, can be gradually at negative electrode
Precipitating metal copper.
Copper ions waste water after solid-liquid separation, under the effect of circulating pump, exists with the flow velocity of 1000-15000 l/h
In electrolysis bath, machinery increase rotation flows up；Under the effect of electric field, hydroxide radical anion is to anode displacement, in solution
Copper ion obtain electronic deposition precipitating metal copper to negative electrode displacement, copper ion at negative electrode, anion loses electricity at anode
Sub-precipitated oxygen.Just can go out groove after scalding, pack warehouse-in when the metallic copper on negative electrode reaches constant weight.
It should be noted that in above-mentioned copper ions waste water in addition to containing copper ion, possibly together with other theoretical deposition potentials
The metal different from copper ion, wherein the theoretical deposition potential of copper ion is the highest.
In the present invention, described flow velocity is typical but non-limiting is 1000 ls/h, 2000 ls/h, 3000 liters/little
Time, 4000 ls/h, 5000 ls/h, 6000 ls/h, 7000 ls/h, 8000 ls/h, 9000 ls/h,
10000 ls/h, 11000 ls/h, 12000 ls/h, 13000 ls/h, 14000 ls/h or 15000 liters/little
Time.
In the present invention, described electric current density is typical but non-limiting for 50A/m2、100A/m2、200A/m2、300A/m2、
400A/m2、500A/m2、600A/m2、700A/m2、800A/m2、900A/m2、1000A/m2、1100A/m2Or 1200A/m2。
The method of above-mentioned Treatment of Copper ion waste water has that technique is simple, low cost, treatment effeciency high and concentration for the treatment of model
Enclose wide advantage.After utilizing said method Treatment of Copper ion waste water, the copper ion in waste water can be reduced to below 0.001g/L,
Current efficiency may be up to 99%, and (current efficiency refers to that the reasonable opinion of actual analysis copper amount analyses the percentage ratio of copper amount, or actual precipitation target
The reasonable opinion of amount of metal separates out the percentage ratio of metal target amount).The copper-containing wastewater of more than 20g/L can reach the electric current effect of more than 98%
Rate, the copper-containing wastewater of more than 5g/L can reach the current efficiency of more than 90%, when copper ion concentration is reduced to reduced levels, electricity
Stream efficiency is the highest.When Cu in waste water ion concentration is at more than 5-10g/L, can the electrolysis production of electric current efficient, high pure
Degree is more than 99.9% tough cathode product, when 1-5g/L, can produce purity more than 99.5% tough cathode product, to greatest extent
By copper resource cash.
Further, described method also includes the step adding the solution containing non-copper metal ion in copper ions waste water
Suddenly, the theoretical deposition potential of described non-copper metal ion is lower than the theoretical deposition potential of copper ion.The effect of above-mentioned steps be for
Guarantee containing other non-copper metal ions in copper ions, and the theoretical deposition potential of other non-copper metal ions is than copper ion
Theoretical deposition potential is low, it is ensured that copper ion can preferentially separate out from negative electrode.
Further, described non-copper metal ion is K+、Ca2+、Mg2+、Na+、Zn2+And Fe2+In any one or at least
The mixing of two kinds.
Further, reduce solution system flow velocity after described method is additionally included in S2 and improve the step of electric current density；
And/or, the metallic copper separated out is taken out, and the step of packaging after scalding.
When in solution copper ion concentration reduce time, reduce solution system flow velocity and improve electric current density can improve electric current effect
Rate.
Further, the waste water flow velocity after reduction is 1000-5000 l/h, and the electric current density after raising is 400-
1200A/m2。
Further, the filter screen of described filtration is ceramic filter screen, and the aperture of described ceramic filter screen is 0.01-0.1 micron.Pottery
Porcelain is mainly made up of silicate, and acid-proof alkaline is excellent, and the features pottery constituted with metal or metal-oxide is also equipped with
The advantages such as good toughness, high temperature resistant, high intensity and antioxygenic property are excellent, foam ceramic filter can effectively filter out in waste water
Solid particle, the filtering accuracy of the ceramic filter screen of 0.01-0.1 micron is higher.
Further, described copper ions waste water is the copper sulfate waste water of highly acidity, low concentration.Highly acidity, low concentration
Copper sulfate waste water uses said method to process, and not only technique is simple, easy and simple to handle, and efficiency is high, low cost.
Further, a kind of method processing Treatment of Copper ion waste water, comprise the following steps:
The ceramic filter screen that the copper sulfate waste water of highly acidity, low concentration is 0.01-0.1 micron through aperture is filtered by S1；
S2, adding containing the solution of non-copper metal ion in copper sulfate waste water, described non-copper metal ion is K+、Ca2+、
Mg2+、Na+、Zn2+And Fe2+In any one or the mixing of at least two；
S3, the solution system in S2 is passed through in electrolysis bath, and with the flow velocity of 1000-15000 l/h in electrolysis bath
Pressurization quickly flowing, at 50-1200A/m2Electric current density formed electric field action under, can be gradually at negative electrode precipitating metal
Copper；
S4, the flow velocity of the solution system in S3 is reduced to 1000-5000 l/h, electric current density is improved to 400-
1200A/m2, continue at negative electrode precipitating metal copper；
S5, the metallic copper separated out by S3 and S4 take out, and pack after scalding.
It should be noted that above-mentioned copper ions waste water is after said method processes, also need to carry out follow-up sewage disposal, with
Thoroughly other harmful substances in waste water are removed.
In the present invention, highly acidity, the copper sulfate waste water of low concentration refer to pH < 4, and copper ion concentration is less than 10 grams per liters
Copper sulfate waste water.
Present invention also offers a kind of metallic copper, described metallic copper is to be prepared by the method for above-mentioned Treatment of Copper ion waste water
Obtain.
Compared with prior art, the invention have the benefit that
The method of a kind of electrolytic metal ion that the present invention provides, uses CSED electrolysis tech, will contain at least two simultaneously
The solution system planting different metal ion is passed through in electrolysis bath, and solution system is rotational flow in electrolysis bath, in the effect of electric field
Under, the metal ion that electrode potential is higher preferentially separates out, the method for above-mentioned electrolytic metal ion can complete wide concentration range (from
0. more than zero grams per liter is to hundreds of grams per liter) and high current density (400A/m2Metal ion electrolysis under above), technique is simple,
Flow process is short, low cost and efficiency high.Said method is utilized to process sewage, it is possible to effectively to solve other sewage treatmentmethod and pollute ring
Border, the problem that waste water remove impurity difficulty is big, technological process length, production cost are high and overall efficiency is low.
The method of Treatment of Copper ion waste water that the present invention provides, has that technique is simple, low cost, treatment effeciency are high and place
The advantage that reason concentration range is wide, it is possible to complete wide concentration range (from 0. more than zero grams per liter to hundreds of grams per liter) and high current density
(400A/m2Copper ion electrolysis under above).After utilizing said method Treatment of Copper ion waste water, the copper ion in waste water can drop
As little as below 0.001g/L, current efficiency may be up to 99%.The method can directly carry out metal ion from low concentration solution
Electrolysis, optionally electrolytic metal, less demanding to solution compolision, can be directly molten from highly acidity, low-concentration sulfuric acid copper
Liquid is produced qualified electro deposited copper product.
The metallic copper that the present invention provides, uses the method for above-mentioned Treatment of Copper ion waste water to prepare, preparation technology letter
List, low cost, prepared metallic copper purity are high, and can prepare powdery or the metallic copper of two kinds of different shapes of tabular.
Detailed description of the invention
Below in conjunction with embodiment, embodiment of the present invention are described in detail, but those skilled in the art will
Understanding, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the present invention.In embodiment unreceipted specifically
Condition person, the condition advised according to normal condition or manufacturer is carried out.
A kind of method of electrolytic metal ion that the present invention provides, comprises the following steps: S1, provide the molten of metal ion
Liquid: described solution contains the metal ion that at least two is different, the theoretical deposition potential of different metal ion is different；
S2, described mixed solution system is passed through in electrolysis bath, and rotational flow in electrolysis bath, under electric field action,
The metal of the highest theoretical deposition potential gradually can be had in negative electrode precipitation.
The method of a kind of Treatment of Copper ion waste water that the present invention provides, comprises the following steps:
S1, by copper ions waste water solid separate；
S2, the copper ions waste water after solid-liquid separation is passed through in electrolysis bath, and with the flow velocity of 1000-15000 l/h
Pressurization quickly flowing in electrolysis bath, at 50-1200A/m2Electric current density formed electric field action under, can be gradually at negative electrode
Precipitating metal copper.
A kind of metallic copper that the present invention provides, is prepared by the method for above-mentioned Treatment of Copper ion waste water.
Below in conjunction with embodiment and detailed description of the invention, the present invention will be further described in detail.
Embodiment 1
A kind of method of electrolytic metal ion, comprises the following steps: S1, offer are containing Zn2+And K+Solution；
S2, above-mentioned solution system is passed through in electrolysis bath, and pressurizes in electrolysis bath quickly stream with the flow velocity of 3000 ls/h
Dynamic, it is 400A/m in electric current density2Under the electric field action formed, can be gradually at negative electrode precipitating metal ferrum.
Embodiment 2
A kind of method of electrolytic metal ion, comprises the following steps: S1, offer are containing Cd2+、K+And Na+Solution；
S2, above-mentioned solution is passed through in electrolysis bath, and pressurizes in electrolysis bath quickly stream with the flow velocity of 3000 ls/h
Dynamic, it is 300A/m in electric current density2Under the electric field action formed, can be gradually at negative electrode precipitating metal cadmium.
Embodiment 3
A kind of method of Treatment of Copper ion waste water, comprises the following steps: S1, by copper ions waste water by aperture be
The ceramic filter net filtration of 0.01 micron；
S2, will filter after copper ions waste water be passed through in electrolysis bath, and with the flow velocity of 1000 ls/h in electrolysis bath
Pressurization quickly flowing, in electric current density 50A/m2Under the electric field action formed, can be gradually at negative electrode precipitating metal copper.
Embodiment 4
A kind of method of Treatment of Copper ion waste water, comprises the following steps: S1, by copper ions waste water by aperture be
The ceramic filter net filtration of 0.05 micron；
S2, will filter after copper ions waste water be passed through in electrolysis bath, and with the flow velocity of 7000 ls/h in electrolysis bath
Pressurization quickly flowing, in electric current density 400A/m2Under the electric field action formed, can be gradually at negative electrode precipitating metal copper.
Embodiment 5
A kind of method of Treatment of Copper ion waste water, comprises the following steps: S1, by copper ions waste water by aperture be
The ceramic filter net filtration of 0.05 micron；
S2, copper ions waste water after filtering add containing K+Solution；
S3, above-mentioned mixed solution system is passed through in electrolysis bath, and pressurizes in electrolysis bath with the flow velocity of 7000 ls/h
Quickly flowing, in electric current density 400A/m2Under the electric field action formed, can be gradually at negative electrode precipitating metal copper.
Embodiment 6
A kind of method of Treatment of Copper ion waste water, comprises the following steps: S1, given up by the copper sulfate of highly acidity, low concentration
Water is by ceramic filter net filtration that aperture is 0.05 micron；
S2, copper ions waste water after filtering add containing K+And Ca2+Solution；
S3, above-mentioned mixed solution system is passed through in electrolysis bath, and pressurizes in electrolysis bath with the flow velocity of 1000 ls/h
Quickly flowing, in electric current density 400A/m2Under the electric field action formed, can be gradually at negative electrode precipitating metal copper.
Embodiment 7
A kind of method of Treatment of Copper ion waste water, comprises the following steps: S1, given up by the copper sulfate of highly acidity, low concentration
Water is by ceramic filter net filtration that aperture is 0.1 micron；
S2, will filter after copper ions waste water be passed through in electrolysis bath, and with the flow velocity of 9000 ls/h in electrolysis bath
Pressurization quickly flowing, in electric current density 200A/m2Under the electric field action formed, can be gradually at negative electrode precipitating metal copper；
S3, the flow velocity of copper ions waste water is reduced to 3000 ls/h, electric current density is improved to 1200A/m2Continue
Electrolysis, continues precipitating metal copper on negative electrode；
S4, the metallic copper separated out by above-mentioned S2 and S3 take out, and pack after scalding.
Embodiment 8
A kind of method of Treatment of Copper ion waste water, comprises the following steps: S1, by copper ions waste water by aperture be
The ceramic filter net filtration of 0.1 micron；
S2, copper ions waste water after filtering add containing Zn2+Solution；
S3, above-mentioned mixed solution system is passed through in electrolysis bath, and pressurizes in electrolysis bath with the flow velocity of 9000 ls/h
Quickly flowing, in electric current density 200A/m2Under the electric field action formed, can be gradually at negative electrode precipitating metal copper；
S4, the flow velocity of copper ions waste water is reduced to 3000 ls/h, electric current density is improved to 1200A/m2Continue
Electrolysis, continues precipitating metal copper on negative electrode；
S5, the metallic copper separated out by above-mentioned S3 and S4 take out, and pack after scalding.
Embodiment 9
A kind of method of Treatment of Copper ion waste water, comprises the following steps: S1, given up by the copper sulfate of highly acidity, low concentration
Water is by ceramic filter net filtration that aperture is 0.05 micron；
S2, will filter after copper ions waste water be passed through in electrolysis bath, and with the flow velocity of 1000 ls/h in electrolysis bath
Pressurization quickly flowing, in electric current density 500A/m2Under the electric field action formed, can be gradually at negative electrode precipitating metal copper；
S3, the metallic copper of above-mentioned precipitation is taken out, and pack after scalding.
Embodiment 10
A kind of metallic copper, uses the method for the Treatment of Copper ion waste water of embodiment 8 to prepare.
Embodiment 11
A kind of metallic copper, uses the method for the Treatment of Copper ion waste water of embodiment 9 to prepare.
Comparative example 1
A kind of method of electrolytic metal ion, comprises the following steps: S1, offer are containing Zn2+And K+Solution；
S2, above-mentioned solution is passed through in electrolysis bath, and flows in electrolysis bath with the flow velocity of 700 ls/h, close at electric current
Degree is 1500A/m2Under the electric field action formed, can be gradually at negative electrode precipitating metal ferrum.
Comparative example 2
A kind of method of Treatment of Copper ion waste water, comprises the following steps: S1, by copper ions waste water by aperture be
The ceramic filter net filtration of 0.01 micron；
S2, will filter after copper ions waste water be passed through in electrolysis bath, and with the flow velocity of 500 ls/h in electrolysis bath
Flowing, in electric current density 10A/m2Under the electric field action formed, can be gradually at negative electrode precipitating metal copper.
Comparative example 3
A kind of method of Treatment of Copper ion waste water, comprises the following steps: S1, given up by the copper sulfate of highly acidity, low concentration
Water is by ceramic filter net filtration that aperture is 0.05 micron；
S2, will filter after copper ions waste water be passed through in electrolysis bath, and with the flow velocity of 600 ls/h in electrolysis bath
Flowing, in electric current density 1250A/m2Under the electric field action formed, can be gradually at negative electrode precipitating metal copper；
S3, the metallic copper of above-mentioned precipitation is taken out, and pack after scalding.
Comparative example 4
A kind of method of Treatment of Copper ion waste water, comprises the following steps: S1, by copper ions waste water by aperture be
The ceramic filter net filtration of 0.1 micron；
S2, copper ions waste water after filtering add containing Zn2+Solution；
S3, above-mentioned mixed solution system is passed through in electrolysis bath, and adds in electrolysis bath with the flow velocity of 20000 ls/h
Pressure quickly flowing, in electric current density 10A/m2Under the electric field action formed, can be gradually at negative electrode precipitating metal copper；
S4, the flow velocity of copper ions waste water is reduced to 3000 ls/h, electric current density is improved to 1200A/m2Continue
Electrolysis, continues precipitating metal copper on negative electrode；
S5, the metallic copper separated out by above-mentioned S3 and S4 take out, and pack after scalding.
For the current efficiency in clear and definite the various embodiments described above and each comparative example, measure in initial soln before method starts
Concentration of metal ions, and measure metal ion in surplus solution after method terminates, by actual amount of precipitation and calculated
Theoretical system measures each current efficiency, and test and result of calculation are as shown in table 1.
Table 1 embodiment 1-9 and comparative example 1-4 current efficiency comparison sheet
By above test data, use the electrolytic metal ion of present invention offer and Treatment of Copper ion waste water
Method, it is possible to complete wide concentration range (from 0. more than zero grams per liter to hundreds of grams per liter) and high current density (400A/m2Above)
Under metal ion electrolysis, when initial concentration higher than 1g/L time, current efficiency, more than 90%, reaches as high as 99%；Work simultaneously
Skill is simple, flow process is short, low cost.The electrolytic metal ion of comparative example 1-4 offer and the electricity of the method for Treatment of Copper ion waste water
Stream efficiency is all below 85%, hence it is evident that less than the electrolytic metal ion of the present invention and the electric current of the method for Treatment of Copper ion waste water
Efficiency.In addition, by electrolytic metal ion provided by the present invention and the concentration for the treatment of of the method for Treatment of Copper ion waste water
Scope and current efficiency compare with concentration range and the current efficiency of conventional electrolytic methods, find that the process of the method for the present invention is dense
Degree scope and current efficiency are superior to traditional method.
Through observation shows that, embodiment 10 gained metallic copper is sheet material, and embodiment 11 gained metallic copper is powder body.
Although illustrate and describing the present invention with specific embodiment, but it will be appreciated that without departing substantially from the present invention's
May be made that in the case of spirit and scope many other change and amendment.It is, therefore, intended that in the following claims
Including all such changes and modifications belonged in the scope of the invention.
Claims (10)
1. the method for an electrolytic metal ion, it is characterised in that comprise the following steps:
S1, the solution of offer metal ion: described solution contains the metal ion that at least two is different, different metal ion
Theoretical deposition potential is different；
S2, described solution is passed through in electrolysis bath, and pressurization quickly flowing in electrolysis bath, under electric field action, can be gradually
The metal with the highest theoretical deposition potential is separated out at negative electrode.
2. the method for a Treatment of Copper ion waste water, it is characterised in that comprise the following steps:
S1, by copper ions waste water solid separate；
S2, the copper ions waste water after solid-liquid separation is passed through in electrolysis bath, and with the flow velocity of 1000-15000 l/h at electricity
Solve pressurization quickly flowing in groove, at 50-1200A/m2Electric current density formed electric field action under, can gradually negative electrode separate out
Metallic copper.
The method of Treatment of Copper ion waste water the most according to claim 2, it is characterised in that described method also includes to containing
Adding the step of the solution containing non-copper metal ion in copper ion waste water, the theoretical deposition potential of described non-copper metal ion compares copper
The theoretical deposition potential of ion is low.
The method of Treatment of Copper ion waste water the most according to claim 3, it is characterised in that described non-copper metal ion is
K+、Ca2+、Mg2+、Na+、Zn2+And Fe2+In any one or the mixing of at least two.
The method of Treatment of Copper ion waste water the most according to claim 2, it is characterised in that be additionally included in described method
Reduce waste water flow velocity after S2 and improve the step of electric current density；
And/or, the metallic copper separated out is taken out, and the step of packaging after scalding.
The method of Treatment of Copper ion waste water the most according to claim 5, it is characterised in that the waste water flow velocity after reduction is
1000-5000 l/h, the electric current density after raising is 400-1200A/m2。
The method of Treatment of Copper ion waste water the most according to claim 2, it is characterised in that the filter screen of described filtration is pottery
Porcelain filter screen, the aperture of described ceramic filter screen is 0.01-0.1 micron.
The method of Treatment of Copper ion waste water the most according to claim 2, it is characterised in that described copper ions waste water is
Highly acidity, the copper sulfate waste water of low concentration.
The method of Treatment of Copper ion waste water the most according to claim 2, it is characterised in that comprise the following steps:
S1, by the copper sulfate waste water of highly acidity, low concentration it is that the ceramic filter screen of 0.01-0.1 micron filters through aperture；
S2, adding containing the solution of non-copper metal ion in copper sulfate waste water, described non-copper metal ion is K+、Ca2+、Mg2+、Na+、Zn2+And Fe2+In any one or the mixing of at least two；
S3, the solution system in S2 is passed through in electrolysis bath, and rotates in electrolysis bath with the flow velocity of 1000-15000 l/h
Flowing, at 50-1200A/m2Electric current density formed electric field action under, can be gradually at negative electrode precipitating metal copper；
S4, the flow velocity of the solution system in S3 is reduced to 1000-5000 l/h, electric current density is improved to 400-
1200A/m2, continue at negative electrode precipitating metal copper；
S5, the metallic copper separated out by S3 and S4 take out, and pack after scalding.
10. a metallic copper, it is characterised in that described metallic copper is to be prepared into by method according to any one of claim 2-9
Arrive.
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