CN115927861A - Process for extracting metal copper from copper-containing acidic mine wastewater - Google Patents
Process for extracting metal copper from copper-containing acidic mine wastewater Download PDFInfo
- Publication number
- CN115927861A CN115927861A CN202310049906.1A CN202310049906A CN115927861A CN 115927861 A CN115927861 A CN 115927861A CN 202310049906 A CN202310049906 A CN 202310049906A CN 115927861 A CN115927861 A CN 115927861A
- Authority
- CN
- China
- Prior art keywords
- copper
- wastewater
- treatment tank
- containing acidic
- mine
- 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.)
- Pending
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 124
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 124
- 239000010949 copper Substances 0.000 title claims abstract description 124
- 239000002351 wastewater Substances 0.000 title claims abstract description 77
- 230000002378 acidificating effect Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 35
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 26
- 239000002184 metal Substances 0.000 title claims abstract description 26
- 230000008569 process Effects 0.000 title claims abstract description 26
- 238000011282 treatment Methods 0.000 claims abstract description 41
- 239000007788 liquid Substances 0.000 claims abstract description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 26
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910001431 copper ion Inorganic materials 0.000 claims abstract description 18
- 239000002253 acid Substances 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000002386 leaching Methods 0.000 claims abstract description 13
- 239000002699 waste material Substances 0.000 claims abstract description 12
- 238000001179 sorption measurement Methods 0.000 claims abstract description 11
- 238000011084 recovery Methods 0.000 claims abstract description 10
- 238000004064 recycling Methods 0.000 claims abstract description 9
- 230000002411 adverse Effects 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 claims abstract description 5
- 150000002739 metals Chemical class 0.000 claims abstract description 5
- 230000009467 reduction Effects 0.000 claims abstract description 5
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 4
- 238000011221 initial treatment Methods 0.000 claims description 24
- 239000012528 membrane Substances 0.000 claims description 24
- 238000003795 desorption Methods 0.000 claims description 15
- 239000012535 impurity Substances 0.000 claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000001471 micro-filtration Methods 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 230000001376 precipitating effect Effects 0.000 claims description 8
- 238000001728 nano-filtration Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 239000011229 interlayer Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 4
- 229910021536 Zeolite Inorganic materials 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000004746 geotextile Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 claims description 3
- 238000010907 mechanical stirring Methods 0.000 claims description 3
- 238000011272 standard treatment Methods 0.000 claims description 3
- 238000004065 wastewater treatment Methods 0.000 claims description 3
- 239000010457 zeolite Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 6
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 4
- 238000007667 floating Methods 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 241000605222 Acidithiobacillus ferrooxidans Species 0.000 description 1
- 241000605272 Acidithiobacillus thiooxidans Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Electrolytic Production Of Metals (AREA)
- Water Treatment By Sorption (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a process for extracting metal copper from copper-containing acidic mine wastewater. The method provides technical support for the efficient treatment of the copper-containing acidic wastewater, the adsorption rate of the copper by the activated carbon is up to more than 95%, the recovery rate of the copper when the copper-rich liquid is replaced by iron powder is up to more than 90%, and the total recovery rate of the copper is more than 80%. In addition, the concentration of copper ions after the secondary electrolysis is lower than 10mg/L, the copper ions can be directly returned to the leaching working section of the acid-containing wastewater of the copper mine, the adverse effects on the leaching, adsorption and the like of other metals are avoided, the cyclic utilization of the wastewater is realized, the equipment is simple, the operation is simple, the investment is low, the cost is low, the adaptability is strong, the environment is protected, the contradiction that the supply and demand of high-quality copper mine resources are increasingly prominent is relieved, and the reduction, recycling and harmless efficient treatment of harmful wastes is realized.
Description
Technical Field
The invention belongs to the technical field of metal copper extraction, and particularly relates to a process for extracting metal copper from copper-containing acidic mine wastewater.
Background
Ores such as copper non-ferrous metal ores contain a certain amount of sulfur or copper sulfide, in the process of mining and dressing, because the surfaces of underground mines and open mines are exposed, stripped rock and soil are stacked in the open, a large amount of tailings are stacked in a tailing pond, under the catalytic action of microorganisms such as thiobacillus ferrooxidans and thiobacillus thiooxidans, copper-containing sulfide ores are oxidized, and mine acid wastewater containing copper ions, sulfuric acid and sulfate is formed through rainwater washing; the general copper processing enterprises can generally divide the treatment of heavy metal-containing waste acid water into two types; firstly, the heavy metal in the dissolved state in the waste acid water is converted into insoluble metal compounds or elements, and is removed from the waste acid water through precipitation and floating, such as a neutralization precipitation method, a sulfide precipitation method, a floating separation method, an electrolytic precipitation (or floating) method, a diaphragm electrolysis method and the like; and concentrating and separating heavy metals in the waste acid water history under the condition of changing the chemical form of the heavy metals, wherein the heavy metals can be applied by a reverse osmosis method, an electrodialysis method, an evaporation method, an adsorption method and the like. The methods are used singly or in combination according to the conditions of the water quality, the water quantity and the like of the waste acid water, the waste acid is generally treated by comprehensively treating lime or strong alkali and the like, and the waste acid water has higher concentration, more quantity, higher treatment cost and more sediments after treatment, so the extraction process of the metal copper in the copper-containing acidic waste water of the mine is provided to solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide a process for extracting metal copper from copper-containing acidic mine wastewater, which aims to solve the problems in the prior art in the background technology.
In order to realize the purpose, the invention adopts the following technical scheme:
a process for extracting metallic copper from copper-containing acidic mine wastewater comprises the following steps:
firstly, mine wastewater is introduced into a primary treatment tank, at least four layers of filter screens are arranged at the inlet of the primary treatment tank, bentonite, activated carbon, zeolite and geotextile filling interlayers are arranged among the multiple layers of filter screens, the mine wastewater flows into the primary treatment tank after being filtered by the multiple layers of filter screens with the filling interlayers, a microfiltration membrane is arranged at the outlet of the primary treatment tank, the mine wastewater flowing out of the primary treatment tank is filtered again through the microfiltration membrane, so that impurities in the mine wastewater are fully filtered, and the filtered acidic wastewater is converged into an electrolytic treatment tank;
collecting solid impurities filtered from an inlet and an outlet of a primary treatment tank, treating the collected solid impurities in a drying and grinding mode, dissolving the solid impurities in an acid solution after grinding the solid impurities into particles, and then merging the particles into an electrolytic treatment tank;
the pH value of the copper-containing acidic wastewater in the electrolytic treatment tank is adjusted to prevent the copper-containing acidic wastewater from precipitating and precipitating in the standing process, anode plates and cathode plates are arranged at two ends of the electrolytic treatment tank, a plurality of cathode films and anode films which are alternately arranged are arranged between the cathode plates and the anode plates, nanofiltration membranes are arranged at the outlet end and the inlet end of the secondary treatment tank, most of metal copper in the copper-containing acidic wastewater is precipitated through electrolysis, then the residual wastewater in the electrolytic treatment tank is transferred to evaporation equipment to be evaporated and concentrated, the copper in the residual wastewater is precipitated by adopting electrolysis again when the concentration of the copper ions in the residual wastewater is suitable for electrolysis, and the electrolysis is stopped when the concentration of the copper ions in the residual wastewater is lower than a certain range.
Preferably, after the electrolysis is stopped, adding the electrolysis residual liquid into a desorption column, adding A-grade analysis liquid to carry out leaching desorption on the copper-containing carbon for 3-5 hours, wherein the A-grade analysis liquid is water according to the mass ratio: 98% sulfuric acid: 30% hydrogen peroxide =1000:15 to 30: 2-5.
Preferably, the mass of the grade A analytic solution used per hour is controlled to be 1-2 times of the mass of the copper-containing carbon in the desorption column, meanwhile, the grade A analytic solution is controlled to be 10-20 cm higher than the carbon surface, and the analytic carbon and the copper-rich solution are obtained after the analysis.
Preferably, the copper-rich liquid of the desorption reaction is added with iron powder to carry out a displacement reaction, wherein the amount of the iron powder is 1.05-1.3 times of the amount of 0.88kg of iron powder required for displacing 1kg of copper, the copper-rich liquid is subjected to the displacement reaction for 30-60 min under the condition of mechanical stirring, then, the solid-liquid separation is carried out to obtain sponge copper and the displaced liquid, and the solid-liquid separation is carried out after the displacement reaction is finished to obtain the sponge copper and the displaced liquid.
Preferably, part of the displaced liquid returns to the second desorption reaction for recycling, and the rest displaced liquid is sent to a wastewater treatment system for standard treatment and then discharged.
Preferably, the aperture of the micro-filtration membrane in the primary treatment pool is controlled to be 0.3-0.5 micron, the outlet pressure is controlled to be 0.3-0.5 MPa, the aperture of the nano-filtration membrane in the electrolytic treatment pool is controlled to be 0.1-0.3 nm, and the pressure at the inlet and outlet is controlled to be 0.5-0.7 MPa; the aperture of each filter screen in the primary treatment is the same and is 3-5 mm, and the distance between the cathode membrane and the anode membrane in the electrolytic treatment is 10-15 cm.
Preferably, in the process of the extraction process of the metallic copper in the copper-containing acidic mine wastewater, the adsorption rate of the copper on the activated carbon is up to more than 95%, the recovery rate of the copper when the copper-rich solution is replaced by iron powder is up to more than 90%, and the total recovery rate of the copper is more than 80%.
Preferably, the concentration of copper ions after the electrolysis in the electrolysis treatment tank is performed again is lower than 10mg/L, the copper ions can be directly returned to the leaching working section of the copper ore acid-containing wastewater, the leaching, adsorption and the like of other metals cannot be adversely affected, the wastewater recycling is realized, the equipment is simple, the operation is simple, the investment is low, the cost is low, the adaptability is strong, the environment is friendly, the contradiction that the supply and demand of high-quality copper ore resources are increasingly prominent is relieved, and the efficient treatment of reduction, recycling and harmlessness of harmful wastes is realized.
The invention has the technical effects and advantages that: compared with the prior art, the extraction process of the metal copper in the copper-containing acidic mine wastewater has the following advantages:
the invention provides a process for extracting metal copper from copper-containing acidic wastewater in a mine, which is characterized in that the pH value of the copper-containing acidic wastewater in an electrolytic treatment tank is regulated to prevent the copper-containing acidic wastewater from precipitating and precipitating in the standing process, an anode plate and a cathode plate are arranged at two ends of the electrolytic treatment tank, a plurality of cathode membranes and anode membranes which are alternately arranged are arranged between the cathode plate and the anode plate, nanofiltration membranes are arranged at the outlet end and the inlet end of a secondary treatment tank, most of metal copper in the copper-containing acidic wastewater is precipitated through electrolysis, then the residual wastewater in the electrolytic treatment tank is transferred to evaporation equipment to be evaporated and concentrated, the copper in the electrolytic residual wastewater is again precipitated after being concentrated to the concentration suitable for electrolysis, and the electrolysis is stopped when the concentration of copper ions in the residual wastewater is lower than a certain range;
the method provides wide space for the high-efficiency treatment of the copper-containing acidic wastewater and provides technical support for the transformation of the existing related enterprises, the adsorption rate of the copper by the activated carbon is up to more than 95%, the recovery rate of the copper can reach more than 90% when the copper-rich liquid is replaced by iron powder, and the total recovery rate of the copper is more than 80%. In addition, the concentration of copper ions after the secondary electrolysis is lower than 10mg/L, the copper ions can be directly returned to the leaching working section of the acid-containing wastewater of the copper mine, the adverse effects on the leaching, adsorption and the like of other metals are avoided, the cyclic utilization of the wastewater is realized, the equipment is simple, the operation is simple, the investment is low, the cost is low, the adaptability is strong, the environment is protected, the contradiction that the supply and demand of high-quality copper mine resources are increasingly prominent is relieved, and the reduction, recycling and harmless efficient treatment of harmful wastes is realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
FIG. 1 is a process flow diagram of the process for extracting metallic copper from copper-containing acidic mine wastewater.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention provides an embodiment as shown in fig. 1:
a process for extracting metallic copper from copper-containing acidic mine wastewater comprises the following steps:
firstly, mine wastewater is introduced into a primary treatment tank, at least four layers of filter screens are arranged at the inlet of the primary treatment tank, bentonite, activated carbon, zeolite and geotextile filling interlayers are arranged among the multiple layers of filter screens, the mine wastewater flows into the primary treatment tank after being filtered by the multiple layers of filter screens with the filling interlayers, a microfiltration membrane is arranged at the outlet of the primary treatment tank, and then the mine wastewater flowing out of the primary treatment tank is filtered again through the microfiltration membrane, so that impurities in the mine wastewater are fully filtered, and the filtered acidic wastewater is converged into an electrolytic treatment tank;
collecting solid impurities filtered from an inlet and an outlet of a primary treatment tank, treating the collected solid impurities in a drying and grinding mode, dissolving the solid impurities in an acid solution after grinding the solid impurities into particles, and then merging the particles into an electrolytic treatment tank;
the pH value of the copper-containing acidic wastewater in the electrolytic treatment tank is adjusted to prevent the copper-containing acidic wastewater from precipitating and precipitating in the standing process, anode plates and cathode plates are arranged at two ends of the electrolytic treatment tank, a plurality of cathode films and anode films which are alternately arranged are arranged between the cathode plates and the anode plates, nanofiltration membranes are arranged at the outlet end and the inlet end of the secondary treatment tank, most of metal copper in the copper-containing acidic wastewater is precipitated through electrolysis, then the residual wastewater in the electrolytic treatment tank is transferred to evaporation equipment to be evaporated and concentrated, the copper in the residual wastewater is precipitated by adopting electrolysis again when the concentration of the copper ions in the residual wastewater is suitable for electrolysis, and the electrolysis is stopped when the concentration of the copper ions in the residual wastewater is lower than a certain range.
Adding electrolytic residual liquid into a desorption column after electrolysis is stopped, adding A-grade analytic liquid to carry out leaching desorption on the copper-containing carbon for 3-5 h, wherein the A-grade analytic liquid is water according to the mass ratio: 98% sulfuric acid: 30% hydrogen peroxide =1000:15 to 30: 2-5.
And controlling the mass of the grade A analytic solution used per hour to be 1-2 times of the mass of the copper-containing carbon in the desorption column, and simultaneously controlling the grade A analytic solution to be 10-20 cm higher than the carbon surface, so as to obtain the analytic carbon and the copper-rich solution after the analysis is finished.
Adding iron powder into the copper-rich liquid obtained by the desorption reaction to carry out a displacement reaction, wherein the amount of the iron powder is 1.05-1.3 times of the amount of 0.88kg of iron powder needed by 1kg of copper to be displaced, carrying out the displacement reaction on the copper-rich liquid for 30-60 min under the condition of mechanical stirring, then carrying out solid-liquid separation to obtain sponge copper and a displaced liquid, and carrying out solid-liquid separation to obtain the sponge copper and the displaced liquid after the displacement reaction is finished; and returning part of the displaced liquid to the second desorption reaction for recycling, and delivering the rest displaced liquid to a wastewater treatment system for standard treatment and then discharging.
The aperture of the microfiltration membrane in the primary treatment tank is controlled to be 0.3-0.5 micron, the outlet pressure is controlled to be 0.3-0.5 MPa, the aperture of the nanofiltration membrane in the electrolytic treatment tank is controlled to be 0.1-0.3 nm, and the inlet and outlet pressure is controlled to be 0.5-0.7 MPa; the aperture of each filter screen in the primary treatment is the same and is 3-5 mm, and the mutual distance between the cathode film and the anode film in the electrolytic treatment is 10-15 cm; in the process of the extraction process of the metallic copper in the copper-containing acidic mine wastewater, the adsorption rate of the activated carbon of the copper is up to more than 95%, the recovery rate of the copper when the copper-rich liquid is replaced by iron powder is up to more than 90%, and the total recovery rate of the copper is more than 80%.
The concentration of copper ions after the secondary electrolysis in the electrolytic treatment tank is lower than 10mg/L, the copper ions can be directly returned to the leaching working section of the acid-containing wastewater in the copper mine, the adverse effects on the leaching, adsorption and the like of other metals are avoided, the cyclic utilization of the wastewater is realized, the equipment is simple, the operation is simple, the investment is low, the cost is low, the adaptability is strong, the environment is friendly, the contradiction that the supply and demand of high-quality copper mine resources are increasingly prominent is relieved, and the efficient treatment of reduction, recycling and harmlessness of harmful wastes is realized.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. A process for extracting metallic copper from copper-containing acidic mine wastewater is characterized by comprising the following steps:
firstly, mine wastewater is introduced into a primary treatment tank, at least four layers of filter screens are arranged at the inlet of the primary treatment tank, bentonite, activated carbon, zeolite and geotextile filling interlayers are arranged among the multiple layers of filter screens, the mine wastewater flows into the primary treatment tank after being filtered by the multiple layers of filter screens with the filling interlayers, a microfiltration membrane is arranged at the outlet of the primary treatment tank, the mine wastewater flowing out of the primary treatment tank is filtered again through the microfiltration membrane, so that impurities in the mine wastewater are fully filtered, and the filtered acidic wastewater is converged into an electrolytic treatment tank;
collecting solid impurities filtered from an inlet and an outlet of a primary treatment tank, treating the collected solid impurities in a drying and grinding mode, dissolving the solid impurities in an acid solution after grinding the solid impurities into particles, and then merging the particles into an electrolytic treatment tank;
the pH value of the copper-containing acidic wastewater in the electrolytic treatment tank is adjusted to prevent the copper-containing acidic wastewater from precipitating and precipitating in the standing process, an anode plate and a cathode plate are arranged at two ends of the electrolytic treatment tank, a plurality of cathode membranes and anode membranes which are alternately arranged are arranged between the cathode plate and the anode plate, nanofiltration membranes are arranged at the outlet end and the inlet end of the secondary treatment tank, most of metal copper in the copper-containing acidic wastewater is precipitated through electrolysis, then the residual wastewater in the electrolytic treatment tank is transferred to evaporation equipment to be evaporated and concentrated, the copper in the residual wastewater is precipitated by adopting electrolysis again when the concentration of the copper ions in the residual wastewater is concentrated to a concentration suitable for electrolysis, and the electrolysis is stopped when the concentration of the copper ions in the residual wastewater is lower than a certain range.
2. The process for extracting metal copper from copper-containing acidic mine wastewater according to claim 1, characterized by comprising the following steps: adding electrolytic residual liquid into a desorption column after electrolysis is stopped, adding A-grade analytic liquid to carry out leaching desorption on the copper-containing carbon for 3-5 h, wherein the A-grade analytic liquid is water according to the mass ratio: 98% sulfuric acid: 30% hydrogen peroxide =1000:15 to 30: 2-5.
3. The process for extracting metal copper from copper-containing acidic mine wastewater according to claim 2, characterized by comprising the following steps: and controlling the mass of the grade A analytic solution used per hour to be 1-2 times of the mass of the copper-containing carbon in the desorption column, and simultaneously controlling the grade A analytic solution to be 10-20 cm higher than the carbon surface, so as to obtain the analytic carbon and the copper-rich solution after the analysis is finished.
4. The process for extracting metal copper from copper-containing acidic mine wastewater according to claim 3, characterized by comprising the following steps: adding the copper-rich liquid of the desorption reaction into iron powder for replacement reaction, wherein the using amount of the iron powder is 1.05-1.3 times of that of 0.88kg of iron powder required by replacing 1kg of copper, performing replacement reaction on the copper-rich liquid for 30-60 min under the condition of mechanical stirring, then performing solid-liquid separation to obtain sponge copper and a solution after replacement, and performing solid-liquid separation after the replacement reaction is finished to obtain the sponge copper and the solution after replacement.
5. The process for extracting the metal copper from the mine copper-containing acidic wastewater according to claim 4, which is characterized in that: and returning part of the displaced liquid to the second desorption reaction for recycling, and delivering the rest displaced liquid to a wastewater treatment system for standard treatment and then discharging.
6. The process for extracting the metal copper from the copper-containing acidic mine wastewater according to claim 1, which is characterized in that: the aperture of the microfiltration membrane in the primary treatment tank is controlled to be 0.3-0.5 micron, the outlet pressure is controlled to be 0.3-0.5 MPa, the aperture of the nanofiltration membrane in the electrolytic treatment tank is controlled to be 0.1-0.3 nm, and the inlet and outlet pressure is controlled to be 0.5-0.7 MPa; the aperture of each filter screen in the primary treatment is the same and is 3-5 mm, and the distance between the cathode membrane and the anode membrane in the electrolytic treatment is 10-15 cm.
7. The process for extracting the metal copper from the copper-containing acidic mine wastewater according to claim 1, which is characterized in that: in the process of the extraction process of the metallic copper in the copper-containing acidic mine wastewater, the adsorption rate of the activated carbon of the copper is up to more than 95%, the recovery rate of the copper when the copper-rich liquid is replaced by iron powder is up to more than 90%, and the total recovery rate of the copper is more than 80%.
8. The process for extracting metal copper from copper-containing acidic mine wastewater according to claim 7, characterized by comprising the following steps: the concentration of copper ions after the secondary electrolysis in the electrolytic treatment tank is lower than 10mg/L, the copper ions can be directly returned to the leaching working section of the acid-containing wastewater in the copper mine, the adverse effects on the leaching, adsorption and the like of other metals are avoided, the cyclic utilization of the wastewater is realized, the equipment is simple, the operation is simple, the investment is low, the cost is low, the adaptability is strong, the environment is friendly, the contradiction that the supply and demand of high-quality copper mine resources are increasingly prominent is relieved, and the efficient treatment of reduction, recycling and harmlessness of harmful wastes is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310049906.1A CN115927861A (en) | 2023-02-01 | 2023-02-01 | Process for extracting metal copper from copper-containing acidic mine wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310049906.1A CN115927861A (en) | 2023-02-01 | 2023-02-01 | Process for extracting metal copper from copper-containing acidic mine wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115927861A true CN115927861A (en) | 2023-04-07 |
Family
ID=86698007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310049906.1A Pending CN115927861A (en) | 2023-02-01 | 2023-02-01 | Process for extracting metal copper from copper-containing acidic mine wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115927861A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104531991A (en) * | 2014-12-23 | 2015-04-22 | 中南大学 | Low-grade copper ore bioleaching solution treatment method |
| CN107129079A (en) * | 2017-05-31 | 2017-09-05 | 厦门紫金矿冶技术有限公司 | A kind of method for handling low concentration cupric cyanide wastewater |
| CN109554544A (en) * | 2017-09-25 | 2019-04-02 | 鄄城广泰耐磨制品有限公司 | A method of recycling copper from acidic copper-containing waste water |
| JP7037023B1 (en) * | 2021-07-22 | 2022-03-16 | 生態環境部華南環境科学研究所 | Copper Pyrophosphate Plating How to Recycle Copper and Phosphorus Resources in Wastewater |
| CN216918848U (en) * | 2021-12-28 | 2022-07-08 | 福建百灵天地环保科技有限公司 | Mine copper-containing acid wastewater comprehensive treatment system |
-
2023
- 2023-02-01 CN CN202310049906.1A patent/CN115927861A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104531991A (en) * | 2014-12-23 | 2015-04-22 | 中南大学 | Low-grade copper ore bioleaching solution treatment method |
| CN107129079A (en) * | 2017-05-31 | 2017-09-05 | 厦门紫金矿冶技术有限公司 | A kind of method for handling low concentration cupric cyanide wastewater |
| CN109554544A (en) * | 2017-09-25 | 2019-04-02 | 鄄城广泰耐磨制品有限公司 | A method of recycling copper from acidic copper-containing waste water |
| JP7037023B1 (en) * | 2021-07-22 | 2022-03-16 | 生態環境部華南環境科学研究所 | Copper Pyrophosphate Plating How to Recycle Copper and Phosphorus Resources in Wastewater |
| CN216918848U (en) * | 2021-12-28 | 2022-07-08 | 福建百灵天地环保科技有限公司 | Mine copper-containing acid wastewater comprehensive treatment system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2293691C (en) | Method for separating and isolating precious metals from non precious metals dissolved in solutions | |
| Bowell et al. | A review of sulfate removal options for mine waters | |
| US5476591A (en) | Liquid treatment system and method for operating the same | |
| CA2307500C (en) | Method for removing contaminants from process streams in metal recovery processes | |
| US6458184B2 (en) | Recovery of zinc from geothermal brines | |
| US5961833A (en) | Method for separating and isolating gold from copper in a gold processing system | |
| CN111727171A (en) | Method for recovering lithium from brine | |
| US5733431A (en) | Method for removing copper ions from copper ore using organic extractions | |
| CN101786734A (en) | Process for treating acid waste water containing copper, nickel and the like by membrane method | |
| Vecino et al. | Valorisation options for Zn and Cu recovery from metal influenced acid mine waters through selective precipitation and ion-exchange processes: promotion of on-site/off-site management options | |
| CN102030433A (en) | Method for treating pure terephthalic acid refined wastewater | |
| CN114988438A (en) | Lithium carbonate circulation lithium extraction process | |
| Awadalla et al. | Opportunities for membrane technologies in the treatment of mining and mineral process streams and effluents | |
| CN115927852A (en) | Method for recovering gold, silver and copper from sulfur concentrate calcine washing waste liquid | |
| CN107381705B (en) | Method for separating and recovering multiple cationic heavy metals in water through phase change regulation | |
| CN115927861A (en) | Process for extracting metal copper from copper-containing acidic mine wastewater | |
| CN114455762B (en) | Wastewater treatment system and application thereof in wastewater treatment of battery anode material production | |
| Vyrides et al. | Metal recovery from sludge: Problem or opportunity | |
| WO2004022796A1 (en) | Process and apparatus for recovery of cyanide and metals | |
| CN213012284U (en) | System for be used for carrying out filtration treatment and jointly removing heavy processing to waste water | |
| CN109761383B (en) | Recycling and treating method and recycling and treating system for heavy metal wastewater | |
| Ranjan | Chemical, Physical and Biological Techniques for Recovery of Heavy Metals from Wastewater | |
| CN215439953U (en) | High concentration phenol-containing waste water precipitation method phenol desorption and recovery unit | |
| CN218404350U (en) | Device for recycling and extracting lithium by taking lithium ore as raw material | |
| Savov et al. | DEVELOPMENT AND APPLICATIONS OF IONTECH ION EXCHANGE (IONTIX®) PROCESS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |