CN113151694A - Method for purifying zinc sulfate electrolyte by using metal aluminum powder - Google Patents
Method for purifying zinc sulfate electrolyte by using metal aluminum powder Download PDFInfo
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- aluminum powder
- purifying agent
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- zinc sulfate
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 42
- 239000002184 metal Substances 0.000 title claims abstract description 42
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 41
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 title claims abstract description 28
- 229910000368 zinc sulfate Inorganic materials 0.000 title claims abstract description 27
- 229960001763 zinc sulfate Drugs 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003792 electrolyte Substances 0.000 title claims abstract description 10
- 239000000243 solution Substances 0.000 claims abstract description 27
- 239000012629 purifying agent Substances 0.000 claims abstract description 25
- 239000010949 copper Substances 0.000 claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 14
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 6
- 239000003929 acidic solution Substances 0.000 claims abstract description 5
- 239000012670 alkaline solution Substances 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 5
- 230000002378 acidificating effect Effects 0.000 claims abstract description 3
- 230000003213 activating effect Effects 0.000 claims abstract description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 4
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Inorganic materials [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 4
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 2
- 239000005751 Copper oxide Substances 0.000 claims description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- 229910000410 antimony oxide Inorganic materials 0.000 claims description 2
- 229910000379 antimony sulfate Inorganic materials 0.000 claims description 2
- MVMLTMBYNXHXFI-UHFFFAOYSA-H antimony(3+);trisulfate Chemical compound [Sb+3].[Sb+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O MVMLTMBYNXHXFI-UHFFFAOYSA-H 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- 235000015165 citric acid Nutrition 0.000 claims description 2
- 229910000431 copper oxide Inorganic materials 0.000 claims description 2
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 2
- 235000019253 formic acid Nutrition 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 235000006408 oxalic acid Nutrition 0.000 claims description 2
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 claims description 2
- 235000019260 propionic acid Nutrition 0.000 claims description 2
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 21
- 239000011701 zinc Substances 0.000 abstract description 19
- 239000002893 slag Substances 0.000 abstract description 17
- 229910052725 zinc Inorganic materials 0.000 abstract description 14
- 239000012535 impurity Substances 0.000 abstract description 10
- 150000002739 metals Chemical class 0.000 abstract description 9
- 229910021645 metal ion Inorganic materials 0.000 abstract description 5
- 229910052793 cadmium Inorganic materials 0.000 abstract description 3
- 229910052759 nickel Inorganic materials 0.000 abstract description 3
- 238000002386 leaching Methods 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 description 10
- 239000000706 filtrate Substances 0.000 description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000001914 filtration Methods 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004070 electrodeposition Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 239000011686 zinc sulphate Substances 0.000 description 1
- 235000009529 zinc sulphate Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
- C22B19/26—Refining solutions containing zinc values, e.g. obtained by leaching zinc ores
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
- C22B3/46—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
-
- 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
- C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a method for purifying zinc sulfate electrolyte by using metal aluminum powder. It is characterized in that: the metal aluminum powder is taken as a main purifying agent, or a substance containing copper or antimony is added as an auxiliary purifying agent; firstly, activating aluminum powder in an acidic or alkaline solution with certain PH; adding a proper amount of purifying agent into a zinc sulfate solution to be purified with certain acidity and temperature, fully mixing and reacting under a certain atmosphere, and then carrying out liquid-solid separation; obtaining zinc electrolyte with qualified impurity metal ions and leaching residue containing high-grade valuable metals such as Ni, Co, Cu, Cd and the like. The invention has simple process, takes the metal aluminum powder with more negative potential than the standard electrode potential of the zinc powder (the traditional purifying agent) as the purifying agent, can shorten the purifying process flow, greatly reduces the using amount of the purifying agent, and produces the slag phase which is easy to recover the impurity valuable metal.
Description
Technical Field
The invention relates to the field of leachate purification in hydrometallurgy, and can purify impurity metal ions in a zinc sulfate solution to be qualified by using metal aluminum powder as a purifying agent and produce leaching slag which is easy to recover impurity valuable metals.
Background
Impure metal ions (Cu) in unpurified zinc sulphate solution in zinc smelting enterprises2+、Cd2+、Co2+、Ni2+、Sb2+、Ge2+) The concentration is too high, which has great negative effect on the economic and technical indexes of zinc electrodeposition and the quality of zinc electroplating.
At present, a zinc powder replacement method is mainly adopted for purifying the impurity ions, but the using amount of the zinc powder is usually 6-10 times of the theoretical amount, the obtained slag phase has high zinc content and large slag amount, and the enrichment of valuable metals such as Cu, Cd, Co, Ni and the like is insufficient. The fundamental reason for this phenomenon is that the zinc powder used has a large particle size (about tens of microns), a small specific surface area and is liable to settle, and the impurity ions, which are not much in total in solution, are extremely dispersed, so that the effective utilization rate of the zinc powder is low. And submicron or nanometer zinc powder with smaller granularity has poor dispersibility in the solution, serious agglomeration and lower effective utilization rate.
Standard electrode potential of aluminum (Al)3+Al, -1.66V) far negative than Zn (Zn)2+Zn, -0.76V). The purification of zinc sulfate solution by using metal aluminum powder has two principle advantages: firstly, the electrode potential is lower than that of zinc, the thermodynamic condition of the replacement reaction with impurity metal ions is better, and the purification is more thorough; secondly, Zn can be converted from metal aluminum powder2+The replacement is performed by nano-grade zinc crystal grains with extremely good dispersibility, so that the kinetic condition of the replacement of impurity metal ions is greatly improved, and the utilization rate of aluminum is improved by multiple times. The process has three benefits: the purifying agent cost is greatly reduced, because the molar mass of the aluminum is 41.26 percent of that of the zinc, the electron quantity provided by each mole of the aluminum is 1.5 times that of the zinc, and the price of the metal aluminum is 78.16 percent of that of the zinc, so even if the purifying efficiency of the aluminum and the metal aluminum is the same, the cost of the aluminum consumption is only 21.46 percent of that of the zinc consumption; the slag quantity is reduced by times, and the valuable metals such as Cu, Cd, Co, Ni and the like in the slag phase have higher grades.
2 patent (application No. 201510507426.0, 201510507841.6) all propose a method of using high aluminum alloy zinc powder (Al content 0.5-25%, Cu content 0.05-0.4%, Pb content 1.5-10%, Sb content 0.01-0.15%, and Zn balance) as zinc sulfate solution scavenger. The method has certain effect, but the preparation process of the purifying agent is complex and the defect of using zinc powder cannot be avoided.
Although the metal aluminum powder has many advantages as a cleaning agent, the current use methods are not all satisfactory. Therefore, it is significant to develop a method of using metal aluminum powder as a zinc sulfate solution purifying agent under a wider range of conditions to exert the advantages of aluminum to the utmost and obtain a greater and more comprehensive purifying effect.
Disclosure of Invention
Aiming at the problems and the defects in the prior art, the method for purifying the zinc sulfate electrolyte by the metal aluminum powder is provided. The method takes metal aluminum powder as a main purifying agent or adds a substance containing copper or antimony as an auxiliary purifying agent, realizes the deep purification of the zinc sulfate solution at low cost under wider conditions, and produces a slag phase with high enrichment degree of valuable metals. The invention is realized by the following technical scheme.
A method for purifying zinc sulfate electrolyte by using metal aluminum powder comprises the following specific steps:
the metal aluminum powder is taken as a main purifying agent, or a substance containing copper or antimony is added as an auxiliary purifying agent; firstly, activating aluminum powder in an acidic or alkaline solution with certain PH; adding a proper amount of purifying agent into the zinc sulfate solution to be purified with certain acidity and temperature, fully mixing and reacting under a certain atmosphere, and then carrying out liquid-solid separation.
In the step [0009], the purity of the main purifying agent metal aluminum powder is more than 60 percent, the auxiliary purifying agents are copper-containing or antimony-containing substances such as metal copper, metal antimony, copper sulfate, antimony sulfate, copper oxide, antimony oxide and the like, and the particle sizes of the purifying agents are all-100 meshes.
In step [0009], the acidic solution is hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, acetic acid, oxalic acid, carbonic acid, citric acid, formic acid, propionic acid, etc., having a PH of about 1.0 to 5.5.
In the step [0009], the alkaline solution is a solution of sodium/potassium/calcium hydroxide, ammonia water, sodium carbonate and the like with the pH value of 7.5-11.
In the step [0009], the activation treatment temperature is 10-60 ℃, and the treatment time is 1-60 min.
In the step [0009], the proper amount of the activated metal aluminum powder is 1-6 times of the theoretical consumption required by purifying the zinc sulfate solution, and the addition amount of the depurative Cu or Sb is 0-250 mg/L.
In the step [0009], the zinc sulfate solution to be purified with certain acidity and temperature is the zinc sulfate solution to be purified with the temperature of 30-95 ℃ and the PH of 1-6.
Step [0009]]Wherein the atmosphere is an open atmosphere or a closed atmosphere (e.g., O)2、H2、SO2Etc.).
In the step [0009], the activated aluminum powder may be added at one time, or may be added in 2 or 3 times, and liquid-solid separation is performed each time.
In the step [0009], the mixing manner includes stirring, ultrasonic, flowing, heating, and the like.
The invention has the beneficial effects that: the application condition is wide, the using amount of the purifying agent is greatly reduced, impurities in the zinc sulfate solution can be deeply purified, the slag amount is small, and the enrichment degree of valuable metals in a slag phase is high.
Detailed Description
The present invention will be further described with reference to the following embodiments.
Example 1.
The method for purifying the zinc sulfate electrolyte by using the metal aluminum powder comprises the following steps:
adding 0.35g (1.1 times of theoretical consumption) of activated aluminum powder (-300 meshes, purity of 99.9% and activation in hydrochloric acid solution with pH of 2.0 for 5min) into 1L of zinc sulfate solution to be purified (containing Zn-148g/L, Cu-635mg/L, Cd 812mg/L, Co-6.5mg/L and Ni-21mg/L) at 73 deg.C and pH of 5.0 at one time, stirring for 50min, filtering to obtain filtrate and slag phase, wherein the components of the filtrate meet the zinc electrodeposition requirements (Cu-0.11mg/L, Cd-0.53mg/L, Co-0.32mg/L and Ni-0.59mg/L), and the enrichment degree of valuable metals in the slag phase is high (Zn-7.2%, Cu-39.55%, Cd-50.75%, Co-0.38%, Ni-1.25% and the rest is 0.87%).
Example 2.
The method for purifying the zinc sulfate electrolyte by using the metal aluminum powder comprises the following steps:
in 1L zinc sulfate solution to be purified (containing Zn-146g/L, Cu-820mg/L, Cd-649mg/L, Co-18.3mg/L, Ni-12.8mg/L) at 50 ℃ and pH 5.0, 0.45g (0.24 g added for the second time and 2.0 times of theoretical consumption) of metal aluminum powder (-300 meshes, 99.9% purity and 10min activation in sodium hydroxide solution at pH 11.0) and 0.108g of CuSO are added for the first time4(purity 99.9%) and 0.05g of SbSO4(purity 95%), stirring for 20min, and filtering to obtain primary filtrate and primary slag phase; adding 0.24g of activated metal aluminum powder into the primary filtrate at 38 ℃ (same as the primary filtrate), stirring for 10min, and filtering to obtain a secondary filtrate and a secondary slag phase, wherein the secondary filtrate comprises the components (Cu-0.12mg/L, Cd-0.28mg/L, Co-0.25mg/L and Ni-0.05mg/L), the enrichment degree of valuable metals in the primary slag phase is high (Zn-27.02%, Cu-39.53%, Cd-31.47%, Co-0.89%, Ni-0.59% and the other 0.50%), and the secondary slag phase mainly contains Zn.
Example 3.
The method for purifying the zinc sulfate electrolyte by using the metal aluminum powder comprises the following steps:
0.636g (1.06 times of theoretical consumption) of activated metal aluminum powder (-100 meshes, the purity of 62 percent and the balance of impurity Si) is added into 1L of zinc sulfate solution to be purified (containing Zn-138g/L, Cu-1020mg/L, Cd 510mg/L, Co-8.5mg/L and Ni-3.9mg/L) with the temperature of 85 ℃ and the pH of 3.5 at one time, the solution is activated in sodium hydroxide solution with the pH of 11.0 for 10min, a filtrate and a slag phase are obtained by filtering after stirring for 70min, wherein the components of the filtrate meet the zinc electrodeposition requirements (Cu-0.15mg/L, Cd-0.74mg/L, Co-0.41mg/L and Ni-0.63mg/L), the enrichment degree of valuable metals in the slag phase is high (Zn-6.09%, Cu-53.73%, Cd-0.43%, Co-0.43% and Ni-0.17%, the other 12.73%).
Claims (10)
1. A method for purifying zinc sulfate electrolyte by using metal aluminum powder is characterized by comprising the following steps:
the metal aluminum powder is taken as a main purifying agent, or a substance containing copper or antimony is added as an auxiliary purifying agent; firstly, activating aluminum powder in an acidic or alkaline solution with certain PH; adding a proper amount of purifying agent into the zinc sulfate solution to be purified with certain acidity and temperature, fully mixing and reacting under a certain atmosphere, and then carrying out liquid-solid separation.
2. The apparatus of claim 1, wherein: the purity of the metal aluminum powder is more than 60 percent, the purifying agent is copper-containing or antimony-containing substances such as metal copper, metal antimony, copper sulfate, antimony sulfate, copper oxide, antimony oxide and the like, and the granularity of the purifying agent is-100 meshes.
3. The apparatus of claim 1, wherein: the acidic solution is hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, acetic acid, oxalic acid, carbonic acid, citric acid, formic acid, propionic acid, etc. with pH of about 1.0-5.5.
4. The apparatus of claim 1, wherein: the alkaline solution is a solution of sodium/potassium/calcium hydroxide, ammonia water, sodium carbonate and the like with the pH value of 7.5-11.
5. The apparatus of claim 1, wherein: the activation treatment temperature is 10-60 ℃, and the treatment time is 1-60 min.
6. The apparatus of claim 1, wherein: the proper amount of the activated metal aluminum powder is 1-6 times of the theoretical consumption amount needed by purifying the zinc sulfate solution, and the addition amount of the auxiliary purifying agent Cu or Sb is 0-250 mg/L.
7. The apparatus of claim 1, wherein: the zinc sulfate solution to be purified with certain acidity and temperature is the zinc sulfate solution to be purified with the temperature of 30-95 ℃ and the PH of 1-6.
8. The apparatus of claim 1, wherein: the atmosphere is an open atmosphere or a closed atmosphere (e.g. O)2、H2、SO2Etc.).
9. The apparatus of claim 1, wherein: the activated aluminum powder can be added at one time, or added in 2 or 3 times, and liquid-solid separation is carried out each time.
10. The apparatus of claim 1, wherein: the mixing mode comprises stirring, ultrasonic, flowing, heating and the like.
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| CN202110227473.5A CN113151694A (en) | 2021-03-01 | 2021-03-01 | Method for purifying zinc sulfate electrolyte by using metal aluminum powder |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| US5453111A (en) * | 1992-01-15 | 1995-09-26 | Metals Recycling Technologies, Inc. | Method for separation of metals from waste stream |
| CN104016403A (en) * | 2013-12-16 | 2014-09-03 | 宁波市镇海新东方精细化工有限公司 | Zinc sulfate impurity removal method |
| CN108277345A (en) * | 2018-01-29 | 2018-07-13 | 昆明理工大学 | A method of the copper removal cadmium from zinc sulfate leaching liquid |
| CN110129585A (en) * | 2019-06-06 | 2019-08-16 | 何耀 | A kind of method of Purification of zinc sulfate solution removing heavy metals |
| CN111254292A (en) * | 2020-01-20 | 2020-06-09 | 昆明瀚创科技有限公司 | Method for removing nickel, cobalt and germanium by zinc sulfate aqueous solution purification |
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2021
- 2021-03-01 CN CN202110227473.5A patent/CN113151694A/en active Pending
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| CA1133228A (en) * | 1980-10-24 | 1982-10-12 | Robert C. Kerby | Purification of zinc sulphate solution |
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| CN108277345A (en) * | 2018-01-29 | 2018-07-13 | 昆明理工大学 | A method of the copper removal cadmium from zinc sulfate leaching liquid |
| CN110129585A (en) * | 2019-06-06 | 2019-08-16 | 何耀 | A kind of method of Purification of zinc sulfate solution removing heavy metals |
| CN111254292A (en) * | 2020-01-20 | 2020-06-09 | 昆明瀚创科技有限公司 | Method for removing nickel, cobalt and germanium by zinc sulfate aqueous solution purification |
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Application publication date: 20210723 |