CN110790434B - Method for simultaneously reducing concentrations of copper ions, zinc ions and lead ions in tailing wastewater generated by mineral separation and recycling - Google Patents
Method for simultaneously reducing concentrations of copper ions, zinc ions and lead ions in tailing wastewater generated by mineral separation and recycling Download PDFInfo
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- CN110790434B CN110790434B CN201911211543.7A CN201911211543A CN110790434B CN 110790434 B CN110790434 B CN 110790434B CN 201911211543 A CN201911211543 A CN 201911211543A CN 110790434 B CN110790434 B CN 110790434B
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- 238000000034 method Methods 0.000 title claims abstract description 32
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- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 150000002500 ions Chemical class 0.000 title claims abstract description 14
- 238000004064 recycling Methods 0.000 title claims abstract description 11
- 229910001431 copper ion Inorganic materials 0.000 title claims abstract description 10
- 238000000926 separation method Methods 0.000 title claims description 26
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims description 24
- 239000011707 mineral Substances 0.000 title claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 33
- 239000011133 lead Substances 0.000 claims abstract description 29
- RVPVRDXYQKGNMQ-UHFFFAOYSA-N lead(2+) Chemical compound [Pb+2] RVPVRDXYQKGNMQ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000005855 radiation Effects 0.000 claims abstract description 8
- 239000002244 precipitate Substances 0.000 claims abstract description 3
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 claims abstract 2
- 229910052976 metal sulfide Inorganic materials 0.000 claims abstract 2
- 230000000593 degrading effect Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000004062 sedimentation Methods 0.000 claims description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 claims 2
- QTANTQQOYSUMLC-UHFFFAOYSA-O Ethidium cation Chemical compound C12=CC(N)=CC=C2C2=CC=C(N)C=C2[N+](CC)=C1C1=CC=CC=C1 QTANTQQOYSUMLC-UHFFFAOYSA-O 0.000 claims 1
- HQABUPZFAYXKJW-UHFFFAOYSA-O butylazanium Chemical compound CCCC[NH3+] HQABUPZFAYXKJW-UHFFFAOYSA-O 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 5
- 239000003814 drug Substances 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011593 sulfur Substances 0.000 abstract description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- 239000012991 xanthate Substances 0.000 abstract 1
- 239000011701 zinc Substances 0.000 description 21
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 20
- 229910052725 zinc Inorganic materials 0.000 description 20
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 description 13
- 238000012360 testing method Methods 0.000 description 13
- TUZCOAQWCRRVIP-UHFFFAOYSA-N butoxymethanedithioic acid Chemical compound CCCCOC(S)=S TUZCOAQWCRRVIP-UHFFFAOYSA-N 0.000 description 11
- 239000012141 concentrate Substances 0.000 description 11
- 239000010949 copper Substances 0.000 description 9
- 229910021645 metal ion Inorganic materials 0.000 description 8
- 230000002000 scavenging effect Effects 0.000 description 8
- 239000010453 quartz Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 238000001556 precipitation Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000005188 flotation Methods 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 238000005456 ore beneficiation Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- UXNBTDLSBQFMEH-UHFFFAOYSA-N [Cu].[Zn].[Pb] Chemical compound [Cu].[Zn].[Pb] UXNBTDLSBQFMEH-UHFFFAOYSA-N 0.000 description 2
- FQGMPQGXUXIOKI-UHFFFAOYSA-N [S--].[S--].[Cu++].[Zn++] Chemical compound [S--].[S--].[Cu++].[Zn++] FQGMPQGXUXIOKI-UHFFFAOYSA-N 0.000 description 2
- 229910000365 copper sulfate Inorganic materials 0.000 description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 2
- 229910000368 zinc sulfate Inorganic materials 0.000 description 2
- 229960001763 zinc sulfate Drugs 0.000 description 2
- FWLHAQYOFMQTHQ-UHFFFAOYSA-N 2-N-[8-[[8-(4-aminoanilino)-10-phenylphenazin-10-ium-2-yl]amino]-10-phenylphenazin-10-ium-2-yl]-8-N,10-diphenylphenazin-10-ium-2,8-diamine hydroxy-oxido-dioxochromium Chemical compound O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.Nc1ccc(Nc2ccc3nc4ccc(Nc5ccc6nc7ccc(Nc8ccc9nc%10ccc(Nc%11ccccc%11)cc%10[n+](-c%10ccccc%10)c9c8)cc7[n+](-c7ccccc7)c6c5)cc4[n+](-c4ccccc4)c3c2)cc1 FWLHAQYOFMQTHQ-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- -1 Pb2+ ions Chemical class 0.000 description 1
- 241001530209 Swertia Species 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 238000001612 separation test Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005486 sulfidation Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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Images
Classifications
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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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—Heavy metal compounds
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
- C02F1/325—Irradiation devices or lamp constructions
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for simultaneously reducing the concentration of copper ions, zinc ions and lead ions in tailing wastewater of beneficiation and reuse. When the concentration of copper ions, zinc ions and lead ions in the tailing wastewater is below 20mg/L, adding xanthate, black medicine and sulfur and nitrogen type beneficiation collecting agents into the tailing wastewater, and controlling the concentration of the beneficiation collecting agents in the tailing wastewater to be 5-100 mg/L; by adopting a VUV irradiation method, the VUV radiation intensity is 180-280 mu W/cm2, the power is 10-200W, the wavelength is 185nm and 254nm, the irradiation time is 10-180 min, and S is promoted to be analyzed by the collecting agent2‑，S2‑And Cu2+、Zn2+、Pb2+The generated metal sulfide precipitates are combined, the concentrations of copper ions, zinc ions and lead ions in the tailings water for beneficiation recycling are reduced, and the whole recycling of the tailings wastewater for beneficiation is realized without influencing the beneficiation indexes.
Description
Technical Field
The invention belongs to the technical field of treatment and recycling of beneficiation wastewater, and particularly relates to a method for simultaneously reducing the concentration of active metal ions in beneficiation recycled tailing wastewater.
Background
The production amount of mineral processing wastewater in China is huge, wherein the tailing wastewater accounts for more than 80% of the mineral processing wastewater, and if the tailing wastewater is directly recycled, copper ions (Cu) in the wastewater are generated2+) Zinc ion (Zn)2+) Lead ion (Pb)2+) Heavy metal ions which play a role in activation or inhibition can cause the deterioration of the separation environment, have great influence on the mineral separation index, and cause the reduction of the grade of the concentrate, the increase of the content of impurities, the reduction of the recovery rate and the like. Due to the fact thatTherefore, the tailing wastewater is treated when being recycled. Common beneficiation wastewater treatment methods include a precipitation method, an adsorption method, a membrane treatment method, an electric flocculation method, an artificial wetland and the like, wherein the precipitation method is most commonly used, but the precipitation method has the problems of large sludge generation amount and easy secondary pollution, and other methods have complicated process flows or need to add a large amount of different treatment agents, so the cost is high, and beneficiation enterprises are difficult to bear.
Wherein the sulfidation precipitation method comprises adding a sulfidizing agent (such as Na)2S) effective removal of the active metal Cu from the solution2+、Zn2+、Pb2 +And the like, but the vulcanizing agent has the same great influence on the beneficiation indexes, the concentration of the vulcanizing agent needs to be accurately controlled, and the vulcanizing agent is not popularized due to the difficulty in controlling the addition amount. The invention discloses a method for treating and recycling copper-zinc sulfide ore dressing wastewater, which aims at the copper-zinc sulfide ore dressing wastewater, adopts a mode of combining a sulfide precipitation method and a coagulating precipitation method, effectively reduces the contents of components such as solid suspended matters, heavy metal ions, residual organic agents and the like in the copper-zinc ore dressing wastewater, and realizes resource utilization and zero discharge of the ore dressing wastewater.
At present, no report about adding a beneficiation collecting agent into recycled tailing wastewater, treating the tailing wastewater by degrading the collecting agent by using a low-pressure Vacuum Ultraviolet (VUV) lamp and simultaneously reducing the concentration of active metal ions in the beneficiation recycled tailing wastewater is found.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for simultaneously reducing the concentrations of copper ions, zinc ions and lead ions in the beneficiation recycling tailing wastewater.
In order to solve the technical problem, the technical scheme adopted by the invention is as follows:
a method for simultaneously reducing the concentrations of copper ions, zinc ions and lead ions in tailing wastewater of ore dressing recycling comprises the following steps:
the method comprises the following steps:
and adding a certain amount of mineral separation collecting agent into the tailing wastewater, and stirring to ensure that the mineral separation collecting agent is fully and uniformly distributed in the wastewater.
Step two:
after the first step is finished, degrading the mineral separation collecting agent in the tailing wastewater by a VUV irradiation method to promote the collecting agent to analyze S2-； S2-And Cu2+、Zn2+、Pb2+The combination generates sulfide metal deposition, the deposition is less, and the concentration of active metal ions is reduced.
Step three:
and after the second step is finished, the tailing wastewater is directly recycled in the mineral separation production without filtration and sedimentation.
Cu in the tailing wastewater in the step I2+、Zn2+、Pb2+The ion concentration is below 20 mg/L;
the ore dressing collector in the first step is a dressing agent for yellow chemicals, black chemicals and sulfur and nitrogen for collecting target minerals in the flotation process, preferably ethyl yellow chemical [ C ]3H5NaOS2]Butyl xanthate [ C ]4H9OCSSNa]Dibutoxyfop [ (C)4H9O)2PSSNH4]Aniline black drug [ (RNH) PSSH]Ethylthio-nitrogen [ (C)2H5)2NCSSNa·3H2O]One or more of the medicaments.
In the first step, after the mineral separation collecting agent is added, the concentration of the mineral separation collecting agent in the tailing wastewater is 5-100 mg/L;
in the second step, the VUV radiation method is: wrapping the quartz tube for the low-pressure vacuum ultraviolet lamp, and placing the quartz tube into the wastewater by a manual or mechanical method, wherein the radiation intensity is 180-2The power is 10-200W, and the wavelength is 185nm and 254 nm; the irradiation time is 10-180 min.
The invention has the following beneficial effects:
1. cu in swertia mine wastewater2+、Zn2+、Pb2+When the ion concentration is below 20mg/L, the selection used in the inventionThe ore collecting agent is a medicament used in the ore dressing process, and VUV radiation is adopted to degrade S separated out by the ore dressing collecting agent2-And Cu2+、Zn2+、Pb2+The reaction is rapid, the removal rate of Cu2+, Zn2+ and Pb2+ ions in the tailing wastewater is more than 94 percent, and the simultaneous removal of Cu is achieved2+、Zn2+、Pb2+The amount of ions and precipitates is small.
2. The process flow is simple, the mineral separation collecting agent is easy to obtain, and the influence of the content of the mineral separation collecting agent in the recycled tailing wastewater on mineral separation indexes is easy to control.
Drawings
FIG. 1 is a flow chart of a treatment process for reducing the concentration of active metal ions in mill run recycled tailing wastewater according to the invention;
FIG. 2 is a flow chart of a tailings wastewater recycling beneficiation test.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
Example 1
Referring to the process flow of fig. 1, the components of the lead-zinc tailing wastewater are firstly detected, and the results are shown in table 1. Adding 10 percent of butyl xanthate (C) into 1000mL of lead-zinc ore tailing wastewater4H9OCSSNa) aqueous solution is 2mL, the content of butyl xanthate in the tailing wastewater is detected to be 24mg/L, and the mixture is stirred uniformly; wrapping the quartz tube for the low-pressure vacuum ultraviolet lamp, manually putting the quartz tube into wastewater, degrading the mineral separation collecting agent in the tailing wastewater by VUV irradiation, controlling the VUV radiation intensity to be 180-280 mu W/cm2, controlling the wavelength to be 185nm and 254nm, controlling the power of the low-pressure vacuum ultraviolet lamp to be 40W, and irradiating for 30 min. The supernatant was collected after filtration and examined, and the results are shown in Table 1. Therefore, after the lead-zinc mine tailing wastewater is treated by the technical scheme of the invention, the removal rates of active metal ions of copper, lead and zinc in the mine tailing wastewater are all over 94 percent, copper is not detected, the lead concentration is reduced from 2.441mg/L to 0.10mg/L, the zinc concentration is reduced from 3.13mg/L to 0.16mg/L, and the treatment effect is good.
TABLE 1 lead-zinc mine tailing wastewater and detection results after treatment
Example 2
Taking 1000mL of copper-lead-zinc mine tailing wastewater with detection results shown in Table 2, adding 6mL of butyl xanthate aqueous solution with the mass concentration of 5%, and stirring, wherein the content of butyl xanthate in the tailing wastewater is detected to be 37 mg/L; meanwhile, 2mL of a 5% ammonium dimonium nigrcide aqueous solution is added and uniformly stirred, and the content of the ammonium dimonium nigrcide in the tailing wastewater is about 10 mg/L. Wrapping the quartz tube for the low-pressure vacuum ultraviolet lamp, manually putting the quartz tube into wastewater, degrading the beneficiation collecting agent in the tailing wastewater by VUV irradiation, controlling the VUV radiation intensity to be 180-280 mu W/cm2, the wavelength to be 185nm and 254nm, controlling the power of the low-pressure vacuum ultraviolet lamp to be 60W, irradiating for 180 min, filtering, taking clear liquid for detection, and obtaining the result shown in Table 2. Therefore, after the copper-lead-zinc mine tailing wastewater is treated by the technical scheme of the invention, the removal rate of active metal ions such as copper, lead and zinc in the mine tailing wastewater is over 97 percent, copper is not detected, the lead concentration is reduced from 7.31mg/L to 0.06mg/L, the zinc concentration is reduced from 5.25mg/L to 0.12mg/L, and the treatment effect is good.
Table 2 copper lead zinc ore dressing tailing wastewater and detection results after treatment
Example 3
Carrying out a lead-zinc ore beneficiation test according to the figure 2, wherein the beneficiation test flow is that raw ore is ground to the required granularity by an ore grinding 1, enters a lead roughing 2, and is subjected to a lead dressing 3 and a scavenging 4 to obtain lead concentrate; the ore pulp after lead separation enters zinc roughing 5 for zinc separation, and zinc concentration 6 and zinc scavenging 7 are carried out to obtain zinc concentrate; and filtering 8 the tailing slurry after zinc separation to obtain tailings and tailing water.
Sampling, adding anti preparation lime 0.8g into lead-zinc raw ore with the mass of 1000g and the granularity of less than 2mm, and grinding by a grinding machine 1 until the granularity of less than 0.074mm accounts for 70%; 0.2g of zinc sulfate, 0.2g of butyl xanthate serving as a collecting agent and 0.045g of 2# oil serving as a foaming agent are gradually added into the ore pulp 11, and the mixture enters a lead roughing 2 to carry out anti zinc lead separation; the foam of the lead roughing 2 is lead roughing concentrate 21, and the lead roughing concentrate enters a lead concentration 3 for concentration to obtain lead concentrate 31; anti preparation zinc sulfate 0.1g, collector butyl xanthate 0.05g and foaming agent 2# oil 0.02g are added into tailing slurry 22 of lead roughing 2, lead scavenging 4 is carried out, and the obtained scavenging concentrate 41 and tailings 32 of lead dressing 3 are returned to lead roughing 2 together.
Adding 0.15g of activating agent copper sulfate, 0.06g of collecting agent butyl xanthate and 0.045g of foaming agent No. 2 oil into tailing slurry of the lead scavenging machine 4, feeding the tailing slurry into a zinc roughing machine 5 for zinc roughing, and feeding the obtained zinc rough concentrate 51 into a zinc fine concentration machine 6 for fine concentration to obtain zinc concentrate 61; adding 0.05g of activator copper sulfate and 0.03g of collector butyl xanthate into tailing slurry 52 of the zinc roughing 5, entering a zinc scavenging operation 7, and returning the obtained scavenging concentrate 71 and tailings 62 of the zinc concentrating 6 to the zinc roughing 5; the tailing slurry 72 from the zinc scavenging 7 is filtered 8 and the filtrate 82 is the tailing water.
In the test 1, the water consumption condition is that untreated tailing water is adopted completely, namely the tailing water is directly recycled;
the water consumption condition of the test 2 is that the tailing water treated by the method is adopted; the tailing water treatment steps are as follows: adding 3mL of a butyl xanthate aqueous solution with the mass concentration of 5% into 1000mL of tailing wastewater, enabling the content of butyl xanthate in the tailing wastewater to reach 15mg/L, uniformly stirring, wrapping a low-pressure vacuum ultraviolet lamp by using a quartz tube, manually putting the wrapped low-pressure vacuum ultraviolet lamp into the wastewater, degrading a mineral separation collecting agent in the tailing wastewater by VUV irradiation, controlling the VUV radiation intensity to be 180-280 mu W/cm2, controlling the wavelength to be 185nm and 254nm, controlling the power of the low-pressure vacuum ultraviolet lamp to be 60W, and irradiating for 40 min.
Test 3 the water conditions were all clear water.
The lead-zinc ore beneficiation tests are carried out according to the beneficiation test flow of the figure 2 in the test 1, the test 2 and the test 3. And drying the concentrates and the tailings, weighing, calculating the yield, sampling, and sending to a laboratory for grade test. The results of the experiment are shown in table 3.
TABLE 3 grade and recovery of flotation products in lead-zinc ore beneficiation test
The result of mineral separation test shows that the concentration of active metal ions in the lead-zinc tailing wastewater treated by the technical scheme provided by the invention is greatly reduced, the lead-zinc tailing wastewater is reused in lead-zinc separation, and the recovery rate and the grade of flotation products are both close to those of clear water. The technical scheme provided by the invention for simultaneously reducing the concentration of the active metal ions in the tailing wastewater generated by mineral separation and reuse can effectively solve the problem of recycling the tailing wastewater generated by mineral separation production.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (2)
1. A method for simultaneously reducing the concentrations of copper ions, zinc ions and lead ions in tailing wastewater of ore dressing recycling is characterized by comprising the following steps:
the method comprises the following steps:
when the concentration of copper ions, zinc ions and lead ions in the tailing wastewater is below 20mg/L, adding a mineral separation collecting agent into the tailing wastewater, stirring, and controlling the concentration of the mineral separation collecting agent in the tailing wastewater to be 5-100 mg/L;
step two:
after the first step is finished, degrading the mineral separation collecting agent in the tailing wastewater by adopting a VUV irradiation method, and controlling the VUV radiation intensity to be 180-2The power is 10-200W, the wavelength is 185nm and 254nm, and the irradiation time is 10-180 min; promote the collecting agent to separate out S2-， S2-And Cu2+、Zn2+、Pb2+The combination produces a precipitate of the metal sulfide with a simultaneous reduction of Cu2+、Zn2+、Pb2+Concentration;
step three:
and after the second step is finished, the tailing wastewater is directly recycled in the mineral separation production without filtration and sedimentation.
2. The method according to claim 1, wherein the beneficiation collector is one or more of an ethyl xanthate, a butyl ammonium nigride, an aniline nigride, and an ethidium agent.
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| DE102009041143A1 (en) * | 2009-09-14 | 2011-03-24 | Frederick Simon Oosthuizen | Processing mining waste water comprises separating sulfur metal ions and sulfate from water, reducing sulfur metal ions and sulfate to sulfide and removing the sulfide from waste water, and oxidizing the waste water loaded with iron salts |
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