CN113337712A - Method for recovering zinc from zinc-containing wastewater - Google Patents
Method for recovering zinc from zinc-containing wastewater Download PDFInfo
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- CN113337712A CN113337712A CN202110514128.XA CN202110514128A CN113337712A CN 113337712 A CN113337712 A CN 113337712A CN 202110514128 A CN202110514128 A CN 202110514128A CN 113337712 A CN113337712 A CN 113337712A
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- zinc
- solid
- filtering
- containing wastewater
- recovering
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 239000011701 zinc Substances 0.000 title claims abstract description 91
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000002351 wastewater Substances 0.000 title claims abstract description 36
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 64
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 36
- 238000001914 filtration Methods 0.000 claims abstract description 36
- 239000007787 solid Substances 0.000 claims abstract description 33
- 230000003647 oxidation Effects 0.000 claims abstract description 32
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 32
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims abstract description 23
- 229960001763 zinc sulfate Drugs 0.000 claims abstract description 23
- 229910000368 zinc sulfate Inorganic materials 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 239000000706 filtrate Substances 0.000 claims abstract description 21
- 238000001704 evaporation Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002253 acid Substances 0.000 claims abstract description 11
- 239000007800 oxidant agent Substances 0.000 claims abstract description 11
- 239000000047 product Substances 0.000 claims abstract description 10
- 238000002386 leaching Methods 0.000 claims abstract description 8
- 230000001590 oxidative effect Effects 0.000 claims abstract description 8
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 17
- 239000012528 membrane Substances 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 10
- 230000008020 evaporation Effects 0.000 claims description 9
- 239000012286 potassium permanganate Substances 0.000 claims description 9
- 238000002425 crystallisation Methods 0.000 claims description 5
- 230000008025 crystallization Effects 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- 239000001117 sulphuric acid Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 description 1
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000013094 purity test Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000011667 zinc carbonate Substances 0.000 description 1
- 229910000010 zinc carbonate Inorganic materials 0.000 description 1
- 235000004416 zinc carbonate 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G9/00—Compounds of zinc
- C01G9/06—Sulfates
-
- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to the technical field of zinc recovery from zinc wastewater, in particular to a method for recovering zinc from zinc-containing wastewater, which mainly comprises the steps of filtering the zinc wastewater, adding excessive acid solution to adjust the pH value, and then filtering zinc raw pulp for the second time; putting the zinc raw pulp into an oxidation tank, adding an oxidant to oxidize to obtain an oxidation liquid, and filtering the oxidation liquid by a filter press to obtain a filtrate and filter residues; adding excessive sodium hydroxide into the filtrate to adjust the pH value, and filtering to obtain a solid and a solution; leaching the solid with water, adding dilute sulfuric acid into the leached solid, adding excessive zinc powder, standing, and filtering to obtain a zinc sulfate solution and zinc; and evaporating and crystallizing the zinc sulfate solution to obtain the finished product zinc sulfate. The method effectively improves the extraction of zinc in the zinc wastewater in the prior art, and greatly improves the purity of the extracted zinc.
Description
Technical Field
The invention relates to the technical field of zinc-containing wastewater treatment, in particular to a method for recovering zinc from zinc-containing wastewater.
Background
Zinc is a heavy metal resource which is abundant on the earth. The reserves of zinc ore resources in China are the second place in the world, and the zinc resources are widely applied to modern industrial production, such as smelting, pharmacy and food industries. Zinc is an indispensable element for human health, widely exists in human muscles and bones, but the content of zinc is very small, and serious consequences can occur if the zinc is in excess. The discharge of the zinc-containing wastewater has serious harm to human health and industrial and agricultural activities, has the characteristics of persistence, high toxicity, serious pollution and the like, once the wastewater enters the environment, the wastewater cannot be biodegraded, most of the wastewater participates in food chain circulation, and finally is accumulated in organisms to destroy normal physiological metabolic activities of the organisms, so that the human health is harmed.
In the prior art, the zinc-containing wastewater is sent to a sewage treatment station for neutralization treatment and then is recycled, but the method in the prior art not only causes the loss of zinc in the zinc-containing wastewater, but also increases the treatment cost of the wastewater. If a proper process is selected to recover the zinc in the zinc-containing wastewater, the recovery rate of the zinc in an enterprise can be improved, and the economic benefit of the enterprise can also be improved.
Disclosure of Invention
The present invention is directed to a method for recovering zinc from zinc-containing wastewater to solve the problems set forth in the background art.
A method for recovering zinc from zinc-containing wastewater, comprising the steps of:
the method comprises the following steps: filtering the zinc wastewater, adding an excessive acid solution to adjust the pH value, and filtering the zinc raw pulp for the second time;
step two: putting the zinc raw pulp into an oxidation tank, adding an oxidant to oxidize to obtain an oxidation liquid, and filtering the oxidation liquid by a filter press to obtain a filtrate and filter residues;
step three: adding excessive sodium hydroxide into the filtrate to adjust the pH value, and filtering to obtain a solid and a solution;
step four: leaching the solid with water, adding dilute sulfuric acid into the leached solid, adding excessive zinc powder, standing, and filtering to obtain a zinc sulfate solution and zinc;
step five: and evaporating and crystallizing the zinc sulfate solution to obtain the finished product zinc sulfate.
Preferably, the acid solution in the first step is a sulfuric acid solution, the concentration of the sulfuric acid solution is 10%, and the solute ratio of the zinc primary pulp is 50%.
Preferably, the pH value adjusted by adding sulfuric acid in the step one is 5.5-6.5.
Preferably, the oxidizing agents in the second step are potassium permanganate and hydrogen peroxide, the ratio of the potassium permanganate to the hydrogen peroxide is 5:7, the temperature of the oxidation pond is 45 degrees, and the oxidation pond is sealed.
Preferably, the pH value in the third step is 8-9, and the filtering process in the third step is to wrap the filtrate added with the sodium hydroxide by using a solid-liquid separation membrane, put the filtrate into a water tank, soak the filtrate for 30min, and then take out the solid-liquid separation membrane and the solid.
Preferably, the dilute sulfuric acid is added in the fourth step with continuous stirring, and the dilute sulfuric acid is added until the solid is completely dissolved.
Preferably, the number of solid rinsing in the fourth step is 3-5.
Preferably, the standing time in the fourth step is 10 min.
Preferably, the evaporative crystallization process in the fifth step is in a closed environment, and water vapor generated by evaporation is discharged through a fan.
Compared with the prior art, the invention has the beneficial effects that: through adding potassium permanganate and hydrogen peroxide solution in the oxidation pond, and keep oxidation pond constancy of temperature 45, make the zinc magma react in the oxidation pond fully and can not be too violent, compare in traditional effect of leading to oxygen oxidation, because zinc waste water contains other metals that dissolve in sulphuric acid and zinc ion can deposit under alkaline condition, can effectively deposit zinc and other alkaline precipitation ion in the filtrating through adding sodium hydroxide regulation PH to oxidizing filtration in the filtrating after, the rethread filters and obtains alkaline solid, guarantee that the material is all alkaline non-soluble, use dilute sulphuric acid to dissolve and can effectively guarantee that the solid is whole to be converted into the sulphate, add zinc powder replacement at last and can effectively replace the whole replacement of non-zinc metal in the sulphate, guarantee that the product only has zinc sulfate, effectively guarantee the purity of retrieving zinc.
Detailed Description
The invention discloses a method for recovering zinc from zinc-containing wastewater, which is further detailed by specific examples.
Example 1
The method for recovering zinc from the zinc-containing wastewater mainly comprises the following steps:
the method comprises the following steps: filtering the zinc wastewater, adding an excessive acid solution to adjust the pH value, and filtering the zinc raw pulp for the second time;
step two: putting the zinc raw pulp into an oxidation tank, adding an oxidant to oxidize to obtain an oxidation liquid, and filtering the oxidation liquid by a filter press to obtain a filtrate and filter residues;
step three: adding excessive sodium hydroxide into the filtrate to adjust the pH value, and filtering to obtain a solid and a solution;
step four: leaching the solid with water, adding dilute sulfuric acid into the leached solid, adding excessive zinc powder, standing, and filtering to obtain a zinc sulfate solution and zinc;
step five: and evaporating and crystallizing the zinc sulfate solution to obtain the finished product zinc sulfate.
The acid solution in the first step is specifically a sulfuric acid solution, the concentration of the sulfuric acid solution is 10%, the solute ratio of the zinc primary pulp is 50%, and the pH value regulated by adding sulfuric acid in the first step is 5.5-6.5.
And in the second step, the oxidizing agents are potassium permanganate and hydrogen peroxide, the ratio of the potassium permanganate to the hydrogen peroxide is 5:7, the temperature of the oxidation pond is 45 degrees, and the oxidation pond is sealed.
And in the third step, the pH value is 8-9, and in the filtering process in the third step, the filtrate added with the sodium hydroxide is wrapped by a solid-liquid separation membrane and is placed in a water tank for soaking for 30min, and then the solid-liquid separation membrane and the solid are taken out.
And continuously stirring in the process of adding the dilute sulfuric acid in the fourth step, adding the dilute sulfuric acid until the solid is completely dissolved, leaching the solid in the fourth step for 3-5 times, and standing for 10min in the fourth step.
And in the fifth step, the evaporation crystallization process is carried out in a closed environment, and water vapor generated by evaporation is discharged through a fan.
Example 2
The method for recovering zinc from the zinc-containing wastewater mainly comprises the following steps:
the method comprises the following steps: filtering the zinc wastewater, adding an excessive acid solution to adjust the pH value, and filtering the zinc raw pulp for the second time;
step two: putting the zinc raw pulp into an oxidation tank, adding an oxidant to oxidize to obtain an oxidation liquid, and filtering the oxidation liquid by a filter press to obtain a filtrate and filter residues;
step three: adding excessive sodium hydroxide into the filtrate to adjust the pH value, and filtering to obtain a solid and a solution;
step four: leaching the solid with water, adding dilute sulfuric acid into the leached solid, adding excessive zinc powder, standing, and filtering to obtain a zinc sulfate solution and zinc;
step five: and evaporating and crystallizing the zinc sulfate solution to obtain the finished product zinc sulfate.
The acid solution in the first step is specifically a sulfuric acid solution, the concentration of the sulfuric acid solution is 10%, the solute ratio of the zinc primary pulp is 50%, and the pH value regulated by adding sulfuric acid in the first step is 5.5-6.5.
And step two, adding an oxidant by introducing oxygen, wherein the ratio of oxygen to nitrogen is 7:3, the temperature of the oxidation pond is 45 degrees, and the oxidation pond is sealed.
And in the third step, the pH value is 8-9, and in the filtering process in the third step, the filtrate added with the sodium hydroxide is wrapped by a solid-liquid separation membrane and is placed in a water tank for soaking for 30min, and then the solid-liquid separation membrane and the solid are taken out.
And continuously stirring in the process of adding the dilute sulfuric acid in the fourth step, adding the dilute sulfuric acid until the solid is completely dissolved, leaching the solid in the fourth step for 3-5 times, and standing for 10min in the fourth step.
And in the fifth step, the evaporation crystallization process is carried out in a closed environment, and water vapor generated by evaporation is discharged through a fan.
Example 3
The method for recovering zinc from the zinc-containing wastewater mainly comprises the following steps:
the method comprises the following steps: filtering the zinc wastewater, adding an excessive acid solution to adjust the pH value, and filtering the zinc raw pulp for the second time;
step two: putting the zinc raw pulp into an oxidation tank, adding an oxidant to oxidize to obtain an oxidation liquid, and filtering the oxidation liquid by a filter press to obtain a filtrate and filter residues;
step three: adding excessive sodium hydroxide into the filtrate to adjust the pH value, and filtering to obtain a solid and a solution;
step four: adding dilute sulfuric acid into the solid, adding excessive zinc powder, standing, and filtering to obtain a zinc sulfate solution and zinc;
step five: and evaporating and crystallizing the zinc sulfate solution to obtain the finished product zinc sulfate.
The acid solution in the first step is specifically a sulfuric acid solution, the concentration of the sulfuric acid solution is 10%, the solute ratio of the zinc primary pulp is 50%, and the pH value regulated by adding sulfuric acid in the first step is 5.5-6.5.
And in the second step, the oxidizing agents are potassium permanganate and hydrogen peroxide, the ratio of the potassium permanganate to the hydrogen peroxide is 5:7, the temperature of the oxidation pond is 45 degrees, and the oxidation pond is sealed.
And in the third step, the pH value is 8-9, and in the filtering process in the third step, the filtrate added with the sodium hydroxide is wrapped by a solid-liquid separation membrane and is placed in a water tank for soaking for 30min, and then the solid-liquid separation membrane and the solid are taken out.
And D, continuously stirring in the process of adding the dilute sulfuric acid in the step four, adding the dilute sulfuric acid until the solid is completely dissolved, and standing for 10min in the step four.
And in the fifth step, the evaporation crystallization process is carried out in a closed environment, and water vapor generated by evaporation is discharged through a fan.
The purity test results of the experimental zinc carbonate are as follows
| Contrast item | Example 1 | Example 2 | Example 3 |
| Purity of zinc sulfate | 99.90％ | 99.72％ | 98.34％ |
Wherein I is the zinc sulfate content of a first finished product in an example II, the zinc sulfate content of a second finished product in an example III, and the zinc sulfate content of a finished product in a third inspection example.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A method for recovering zinc from zinc-containing wastewater is characterized by comprising the following steps: comprises the following steps:
the method comprises the following steps: filtering the zinc wastewater, adding an excessive acid solution to adjust the pH value, and filtering the zinc raw pulp for the second time;
step two: putting the zinc raw pulp into an oxidation tank, adding an oxidant to oxidize to obtain an oxidation liquid, and filtering the oxidation liquid by a filter press to obtain a filtrate and filter residues;
step three: adding excessive sodium hydroxide into the filtrate to adjust the pH value, and filtering to obtain a solid and a solution;
step four: leaching the solid with water, adding dilute sulfuric acid into the leached solid, adding excessive zinc powder, standing, and filtering to obtain a zinc sulfate solution and zinc;
step five: and evaporating and crystallizing the zinc sulfate solution to obtain the finished product zinc sulfate.
2. A process for recovering zinc from zinc-containing wastewater according to claim 1, characterized in that: the acid solution in the first step is a sulfuric acid solution, the concentration of the sulfuric acid solution is 10%, and the solute ratio of the zinc primary pulp is 50%.
3. A method for recovering zinc from zinc-containing wastewater according to claim 2, characterized in that: and adding sulfuric acid in the step one to adjust the pH value to be 5.5-6.5.
4. A process for recovering zinc from zinc-containing wastewater according to claim 1, characterized in that: and the oxidizing agents in the step two are potassium permanganate and hydrogen peroxide, the ratio of the potassium permanganate to the hydrogen peroxide is 5:7, the temperature of the oxidation pond is 45 degrees, and the oxidation pond is closed.
5. A process for recovering zinc from zinc-containing wastewater according to claim 1, characterized in that: and the pH value in the third step is 8-9, and the filtering process in the third step is to wrap the filtrate added with the sodium hydroxide by using a solid-liquid separation membrane, put the filtrate into a water tank, soak the filtrate for 30min, and take out the solid-liquid separation membrane and the solid.
6. A process for recovering zinc from zinc-containing wastewater according to claim 1, characterized in that: in the fourth step, the dilute sulfuric acid is added while stirring, and the dilute sulfuric acid is added until the solid is completely dissolved.
7. A process for recovering zinc from zinc-containing wastewater according to claim 1, characterized in that: and the solid leaching times in the fourth step are 3-5 times.
8. A process for recovering zinc from zinc-containing wastewater according to claim 1, characterized in that: and the standing time in the fourth step is 10 min.
9. A process for recovering zinc from zinc-containing wastewater according to claim 1, characterized in that: and in the fifth step, the evaporation crystallization process is carried out in a closed environment, and water vapor generated by evaporation is discharged through a fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110514128.XA CN113337712A (en) | 2021-05-11 | 2021-05-11 | Method for recovering zinc from zinc-containing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110514128.XA CN113337712A (en) | 2021-05-11 | 2021-05-11 | Method for recovering zinc from zinc-containing wastewater |
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| CN113337712A true CN113337712A (en) | 2021-09-03 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732731A (en) * | 2012-07-09 | 2012-10-17 | 湖南中燎科技有限公司 | Method for extracting valuable metals and refining zinc sulphate monohydrate from zinc-containing waste material |
| CN102965505A (en) * | 2012-10-31 | 2013-03-13 | 铜陵市祥英锌业有限公司 | One-step method for removing manganese and cobalt impurities in zinc sulfate solution |
| CN105129839A (en) * | 2015-08-22 | 2015-12-09 | 湖南华信稀贵科技有限公司 | Method for producing micron-grade zinc oxide with high fluorine and chlorine crude zinc oxide as raw material |
| CN108002580A (en) * | 2017-09-22 | 2018-05-08 | 中冶长天国际工程有限责任公司 | A kind of acidic flue gas treatment of waste water from washing and application thereof |
-
2021
- 2021-05-11 CN CN202110514128.XA patent/CN113337712A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102732731A (en) * | 2012-07-09 | 2012-10-17 | 湖南中燎科技有限公司 | Method for extracting valuable metals and refining zinc sulphate monohydrate from zinc-containing waste material |
| CN102965505A (en) * | 2012-10-31 | 2013-03-13 | 铜陵市祥英锌业有限公司 | One-step method for removing manganese and cobalt impurities in zinc sulfate solution |
| CN105129839A (en) * | 2015-08-22 | 2015-12-09 | 湖南华信稀贵科技有限公司 | Method for producing micron-grade zinc oxide with high fluorine and chlorine crude zinc oxide as raw material |
| CN108002580A (en) * | 2017-09-22 | 2018-05-08 | 中冶长天国际工程有限责任公司 | A kind of acidic flue gas treatment of waste water from washing and application thereof |
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