CN108950204A - A method of zinc is effectively recycled from the pickle liquor of cupric - Google Patents
A method of zinc is effectively recycled from the pickle liquor of cupric Download PDFInfo
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- CN108950204A CN108950204A CN201810815382.1A CN201810815382A CN108950204A CN 108950204 A CN108950204 A CN 108950204A CN 201810815382 A CN201810815382 A CN 201810815382A CN 108950204 A CN108950204 A CN 108950204A
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- 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
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- 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
- C22B11/00—Obtaining noble metals
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- 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
- C22B19/22—Obtaining zinc otherwise than by distilling with leaching with acids
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- 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
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
- C22B3/24—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition by adsorption on solid substances, e.g. by extraction with solid resins
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- 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
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/36—Heterocyclic compounds
- C22B3/362—Heterocyclic compounds of a single type
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/12—Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper
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Abstract
The present invention relates to a kind of methods that zinc is effectively recycled in pickle liquor from cupric, including being fired the pickle liquor of the resulting cupric of acid leaching process to gold and silver concentrate through multi-stage oxidizing, charcoal adsorbs gold and silver, extraction electrodeposition, chelated zinc ions, chelate decomposition and etc., by the present invention in that forming highly stable chelate with the zinc ion of four picolyl ethylenediamine of chelating agent and divalent, a small amount of copper can still contained, zinc ion is separated in the raffinate of iron plasma, to which zinc ion is effectively used, compared with traditional Extraction electrodeposition technique, zinc is effectively recycled, and reduce the processing cost of pickle liquor, reduce the influence to ambient enviroment.
Description
Technical field
The present invention relates to effectively recycle in a kind of recovery method of metallic zinc more particularly to a kind of pickle liquor from Gold Concentrate under Normal Pressure
The method of zinc, belongs to field of chemical metallurgical technology.
Background technique
In recent years, in gold smelting field cupric gold and silver concentrate baking cyaniding technique, be to adopt the concentrate of cupric gold and silver
Slurry type feeding is roasted at a certain temperature with the oxygen in air after being sized mixing with water, and roasting gained high-temperature flue gas enters sulfuric acid
Production technology, gained calcining and dilute sulfuric acid carry out acidleach, output cupric pickle liquor, gained cupric acidleach under the conditions of certain acidleach
Enter extraction electrodeposition technique after liquid, extraction is the key step of modern wet-milling processing (Leaching-solvent Extraction-electrowinning Technology, L-SX-EW)
Suddenly.With the exploitation of efficient, stable copper extractant, the hydrometallurgy of copper has obtained huge development.Currently, the whole world 20%
Copper is produced by Extraction electrodeposition technique.
Although good recycling, the zinc contained in Gold Concentrate under Normal Pressure can be obtained by traditional Extraction electrodeposition technique in copper metal
The recycling of metal is but always a problem, and the zinc metal contained in Gold Concentrate under Normal Pressure is leached during acidleach with copper together, existing
In some technique, the raffinate waste liquid (containing remaining a small amount of copper simultaneously) containing zinc is by the way of lime neutralization
Reason not only causes the waste of zinc resource, but also neutralize higher cost, institute so that zinc enters the bottom ash of lime neutralization in this way
Bottom ash can partially be sold to cement plant and do raw materials for production, remainder can only be stored up, and not only take up a large amount of soils in this way, and right
Ambient enviroment causes to seriously affect, and with national conservation-minded society, the proposition of environment-friendly type social construction, carries out in cupric pickle liquor
The research and application of the effectively recycling, reduction outlet and neutralisation treatment cost direction of metallic zinc are rather important.
Summary of the invention
Deficiency present in recovery method of the present invention for metallic zinc in the pickle liquor of Gold Concentrate under Normal Pressure provides a kind of from cupric
Pickle liquor in effectively recycle the method for zinc.
The technical scheme to solve the above technical problems is that
A method of zinc effectively being recycled from the pickle liquor of cupric, is included the following steps:
1) it is concatenated that the pickle liquor that gold and silver concentrate is fired the resulting cupric of acid leaching process multi-stage oxidizing: is introduced several
In stirred tank, hydrogen peroxide and potassium permanganate are added into stirred tank, the additional amount of hydrogen peroxide is 3-5kg/m3, potassium permanganate plus
Entering amount is 0.5-1.0kg/m3, oxidated solution is obtained after oxidation 3-5 hours；
2) charcoal adsorbs gold and silver: so that oxidated solution obtained in step 1) is flowed through activated carbon adsorption device, controls oxidated solution
Flow velocity be 10-20m3/ h, liquid after output absorption after absorption, gold, silver are effectively adsorbed in active carbon at this time, the load gold and silver of output
Active carbon carries out smelting recycling, output gold and silver product；
3) extraction electrodeposition: liquid carries out level-one extraction with copper extractant after adsorbing obtained in step 2), obtains level-one extraction
The organic phase of extraction raffinate and load, the organic phase of load obtain level-one copper-rich liquid and regeneration organic phase after carrying out acidleach back extraction copper；Two
Grade extraction, the level-one raffinate after dilution carry out second level extraction using regeneration organic phase, obtain second level raffinate and part
The organic phase of load；The organic phase of fractional load obtains second level copper-rich liquid, level-one copper-rich liquid and second level copper-rich after acidleach is stripped copper
Through electrodeposition process output tough cathode after liquid merging；
4) chelated zinc ions: four picolyl ethylenediamine of chelating agent is added into the resulting second level raffinate of step 3), stirs
Mixing mixing makes chelating agent and zinc ion form chelate, and organic solvent is added in backward mixed system and is extracted, stirring makes it
It is sufficiently mixed, rear standing liquid separation obtains organic phase and water phase, and the chelate of zinc ion is present in organic phase；
5) chelate decomposes: the acid adding into organic phase obtained by step 4), and adjusting pH is 3-5, makes four picolyl of chelating agent
Ethylenediamine at salt, after thereto plus water is extracted, stirring mixes them thoroughly, rear to stand liquid separation and obtain organic phase and water phase, has
Machine it is mutually purified after return step 4) in reuse, water phase is zinc solution.
Further, the additional amount of four picolyl ethylenediamine of chelating agent is 50~100mg/L in step 4).
Further, the pickle liquor of cupric described in step 1) 0.03-0.06g/m containing gold3, argentiferous 0.01-0.05g/m3, contain
Copper 1-10g/L, iron content 3-10g/L, 2-8kg/m containing zinc3。
Further, the pickle liquor of cupric described in step 1) obtains by the following method:
I is sized mixing roasting: gold and silver concentrate is sized mixing with water, control pulp density is 50-70wt%, after ore pulp is placed in 500-
Roast to obtain high-temperature flue gas and calcining at 650 DEG C, roasting refer to gold and silver concentrate make in calciner inflammable substance sulphur, arsenic, carbon,
The clean-burning process of the elements such as selenium, gained high-temperature flue gas enter sulfuric acid production process output arsenic trioxide product and sulphuric acid production
Product；
II acidleach: calcining being mixed with dilute sulfuric acid and is sized mixing, and control pulp density is 30-35wt%, after ore pulp is placed in 50-
Acidleach is carried out under the conditions of 70 DEG C, after will separation of solid and liquid obtain the pickle liquor of acid leaching residue and cupric containing gold and silver, gained is containing gold and silver
Acid leaching residue enters recovery for Au and Ag system recycling gold and silver.
Further, the mass concentration of dilute sulfuric acid described in step II acid leaching process is 1-2.5wt%, leaching time control
It is 2-4 hours.
Further, copper extractant described in step 3) is oximes extractant, beta-diketon kind of extractants, ternary amine extraction
Agent and any one in compounding kind of extractants, the compounding preferred ketoxime of kind of extractants is compounded with aldoxime.
Further, organic solvent described in step 4) be ethyl acetate, acetone, THF, DMSO, benzene,toluene,xylene,
Any one in DMF.
Further, the stirred tank in step 1) is 3-5 concatenated stirred tanks, and the mixing speed control of stirred tank is 50-
80r/min。
Further, the control of adsorption process described in step 2) is 4-6 hours.
Four picolyl ethylenediamine Chinese name of Zinc Ions Chelated agent used in the present invention are as follows: tetra- (2- of N, N, N', N'-
Picolyl) ethylenediamine, CAS:16858-02-9.
The beneficial effects of the present invention are:
1) by the present invention in that forming highly stable chela with the zinc ion of four picolyl ethylenediamine of chelating agent and divalent
Object is closed, can be separated zinc ion in the raffinate for still containing a small amount of copper, iron plasma, so that zinc ion is able to effectively
It utilizes, compared with traditional Extraction electrodeposition technique, has effectively recycled zinc, and reduce the processing cost of pickle liquor, reduce pair
The influence of ambient enviroment；
2) due to the basic Whote-wet method closed cycle of whole set process process, the circulation comprehensive benefit of cupric pickle liquor is significantly improved
With efficiency, wastewater zero discharge is realized, reduces the pollution to ambient enviroment, finally improves the economic benefit of enterprise.
Specific embodiment
Principles and features of the present invention are described below in conjunction with example, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
The 0.03-0.06g/m containing gold of the pickle liquor of raw material cupric used in the embodiment of the present invention3, argentiferous 0.01-
0.05g/m3, cupric 1-10g/l, iron content 3-10g/l, 2-8kg/m containing zinc3, production obtains by the following method:
I is sized mixing roasting: gold and silver concentrate is sized mixing with water, control pulp density is 50-70wt%, after ore pulp is placed in 500-
Roast to obtain high-temperature flue gas and calcining at 650 DEG C, roasting refer to gold and silver concentrate make in calciner inflammable substance sulphur, arsenic, carbon,
The clean-burning process of the elements such as selenium, gained high-temperature flue gas enter sulfuric acid production process output arsenic trioxide product and sulphuric acid production
Product；
II acidleach: calcining being mixed with the dilute sulfuric acid that mass concentration is 1-2.5wt% and is sized mixing, and control pulp density is 30-
35wt%, after ore pulp is placed in 50-70 DEG C under the conditions of carry out acidleach, after acidleach 2-4 hours will separation of solid and liquid obtain containing gold and silver
The pickle liquor of acid leaching residue and cupric, acid leaching residue of the gained containing gold and silver enter recovery for Au and Ag system recycling gold and silver.
Embodiment 1:
A method of zinc effectively being recycled from the pickle liquor of cupric, is included the following steps:
1) multi-stage oxidizing: the pickle liquor that gold and silver concentrate is fired the resulting cupric of acid leaching process is introduced 3 and concatenated is stirred
It mixes in slot, hydrogen peroxide and potassium permanganate is added into stirred tank, the additional amount of hydrogen peroxide is 3kg/m3, the additional amount of potassium permanganate
For 1.0kg/m3, mixing speed 60r/min, oxidation 3 hours after oxidated solution；
2) charcoal adsorbs gold and silver: so that oxidated solution obtained in step 1) is flowed through activated carbon adsorption device, controls oxidated solution
Flow velocity be 15m3/ h, liquid after output absorption after circulation absorption 4 hours, gold, silver are effectively adsorbed in active carbon at this time, output
It carries gold and silver active carbon and carries out smelting recycling, output gold and silver product；
3) extraction electrodeposition: liquid carries out level-one extraction with copper extractant Acorga M5640 after adsorbing obtained in step 2)
Take, obtain the organic phase of level-one raffinate and load, the organic phase of load obtain after acidleach back extraction copper level-one copper-rich liquid and
Regenerate organic phase；Second level extraction, the level-one raffinate after dilution carry out second level extraction using regeneration organic phase, obtain second level
The organic phase of raffinate and fractional load；The organic phase of fractional load obtains second level copper-rich liquid, level-one copper-rich after acidleach is stripped copper
Liquid merge with second level copper-rich liquid after through electrodeposition process output tough cathode；
4) four picolyl ethylenediamine of chelating agent, chela chelated zinc ions: are added into the resulting second level raffinate of step 3)
The additional amount of mixture is 80mg/L, and being stirred makes chelating agent and zinc ion form chelate, and second is added in backward mixed system
Acetoacetic ester is extracted, and stirring mixes them thoroughly, and rear standing liquid separation obtains organic phase and water phase, and the chelate of zinc ion is present in
In organic phase；
5) chelate decomposes: into organic phase obtained by step 4) plus the dilute hydrochloric acid of 1mol/L, adjusting pH are 3-5, make to chelate
Four picolyl ethylenediamine of agent at salt, after thereto plus the water of equal volume is extracted, stirring mixes them thoroughly, rear to stand
Liquid separation obtains organic phase and water phase, return step 4 after organic phase is purified) in reuse, water phase is liquor zinci chloridi.
Embodiment 2:
A method of zinc effectively being recycled from the pickle liquor of cupric, is included the following steps:
1) multi-stage oxidizing: the pickle liquor that gold and silver concentrate is fired the resulting cupric of acid leaching process is introduced 5 and concatenated is stirred
It mixes in slot, hydrogen peroxide and potassium permanganate is added into stirred tank, the additional amount of hydrogen peroxide is 5kg/m3, the additional amount of potassium permanganate
For 0.5kg/m3, mixing speed 50r/min, oxidation 5 hours after oxidated solution；
2) charcoal adsorbs gold and silver: so that oxidated solution obtained in step 1) is flowed through activated carbon adsorption device, controls oxidated solution
Flow velocity be 10m3/ h, liquid after output absorption after circulation absorption 5 hours, gold, silver are effectively adsorbed in active carbon at this time, output
It carries gold and silver active carbon and carries out smelting recycling, output gold and silver product；
3) extraction electrodeposition: liquid carries out level-one extraction with copper extractant Lix984 after adsorbing obtained in step 2), obtains
The organic phase of level-one raffinate and load, the organic phase of load obtain level-one copper-rich liquid after carrying out acidleach back extraction copper and regenerate organic
Phase；Second level extraction, by dilution after level-one raffinate using regeneration organic phase carry out second level extraction, obtain second level raffinate with
The organic phase of fractional load；The organic phase of fractional load obtains second level copper-rich liquid, level-one copper-rich liquid and second level after acidleach is stripped copper
Through electrodeposition process output tough cathode after the merging of copper-rich liquid；
4) four picolyl ethylenediamine of chelating agent, chela chelated zinc ions: are added into the resulting second level raffinate of step 3)
The additional amount of mixture is 50mg/L, and being stirred makes chelating agent and zinc ion form chelate, is added third in backward mixed system
Ketone is extracted, and stirring mixes them thoroughly, and rear standing liquid separation obtains organic phase and water phase, and the chelate of zinc ion is present in organic
Xiang Zhong；
5) chelate decomposes: into organic phase obtained by step 4) plus the dilute sulfuric acid of 1mol/L, adjusting pH are 3-5, make to chelate
Four picolyl ethylenediamine of agent at salt, after thereto plus isometric water is extracted, stirring mixes them thoroughly, rear to stand point
Liquid obtains organic phase and water phase, return step 4 after organic phase is purified) in reuse, water phase is solution of zinc sulfate.
Embodiment 3:
A method of zinc effectively being recycled from the pickle liquor of cupric, is included the following steps:
1) multi-stage oxidizing: the pickle liquor that gold and silver concentrate is fired the resulting cupric of acid leaching process is introduced 3 and concatenated is stirred
It mixes in slot, hydrogen peroxide and potassium permanganate is added into stirred tank, the additional amount of hydrogen peroxide is 4kg/m3, the additional amount of potassium permanganate
For 0.8kg/m3, mixing speed 80r/min, oxidation 4 hours after oxidated solution；
2) charcoal adsorbs gold and silver: so that oxidated solution obtained in step 1) is flowed through activated carbon adsorption device, controls oxidated solution
Flow velocity be 20m3/ h, liquid after output absorption after circulation absorption 6 hours, gold, silver are effectively adsorbed in active carbon at this time, output
It carries gold and silver active carbon and carries out smelting recycling, output gold and silver product；
3) extraction electrodeposition: after being adsorbed obtained in step 2) the copper extractant SME529 that produces of liquid Shell company into
The extraction of row level-one, obtains the organic phase of level-one raffinate and load, and the organic phase of load obtains level-one after carrying out acidleach back extraction copper
Copper-rich liquid and regeneration organic phase；Second level extraction, the level-one raffinate after dilution carry out second level extraction using regeneration organic phase,
Obtain the organic phase of second level raffinate and fractional load；The organic phase of fractional load obtains second level copper-rich liquid after acidleach is stripped copper,
Level-one copper-rich liquid merge with second level copper-rich liquid after through electrodeposition process output tough cathode；
4) four picolyl ethylenediamine of chelating agent, chela chelated zinc ions: are added into the resulting second level raffinate of step 3)
The additional amount of mixture is 100mg/L, and being stirred makes chelating agent and zinc ion form chelate, and being added in backward mixed system has
Solvent THF is extracted, and stirring mixes them thoroughly, and rear standing liquid separation obtains organic phase and water phase, and the chelate of zinc ion is deposited
It is in organic phase；
5) chelate decomposes: into organic phase obtained by step 4) plus the dilute sulfuric acid of 1mol/L, adjusting pH are 3-5, make to chelate
Four picolyl ethylenediamine of agent at salt, after thereto plus water is extracted, stirring mixes them thoroughly, it is rear stand liquid separation obtain it is organic
Mutually and water phase, organic phase it is purified after return step 4) in reuse, water phase is solution of zinc sulfate.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. effectively recycling the method for zinc in a kind of pickle liquor from cupric, which comprises the steps of:
1) pickle liquor that gold and silver concentrate is fired the resulting cupric of acid leaching process multi-stage oxidizing: is introduced into several concatenated stirrings
In slot, hydrogen peroxide and potassium permanganate are added into stirred tank, the additional amount of hydrogen peroxide is 3-5kg/m3, the additional amount of potassium permanganate
For 0.5-1.0kg/m3, oxidated solution is obtained after oxidation 3-5 hours；
2) charcoal adsorbs gold and silver: so that oxidated solution obtained in step 1) is flowed through activated carbon adsorption device, controls the stream of oxidated solution
Speed is 10-20m3/ h, liquid after output absorption after absorption, gold, silver are effectively adsorbed in active carbon at this time, the load gold and silver activity of output
Charcoal carries out smelting recycling, output gold and silver product；
3) extraction electrodeposition: liquid carries out level-one extraction with copper extractant after adsorbing obtained in step 2), obtains level-one raffinate
With the organic phase of load, the organic phase of load obtains level-one copper-rich liquid and regeneration organic phase after carrying out acidleach back extraction copper；Second level extraction
It takes, the level-one raffinate after dilution carries out second level extraction using regeneration organic phase, obtains second level raffinate and fractional load
Organic phase；The organic phase of fractional load obtains second level copper-rich liquid after acidleach is stripped copper, and level-one copper-rich liquid and second level copper-rich liquid close
Through electrodeposition process output tough cathode after and；
4) chelated zinc ions: four picolyl ethylenediamine of chelating agent being added into the resulting second level raffinate of step 3), and stirring is mixed
Conjunction makes chelating agent and zinc ion forms chelate, and organic solvent is added in backward mixed system and is extracted, stirring makes it sufficiently
Mixing, rear standing liquid separation obtain organic phase and water phase, and the chelate of zinc ion is present in organic phase；
5) chelate decomposes: the acid adding into organic phase obtained by step 4), and adjusting pH is 3-5, makes four picolyl second two of chelating agent
Amine at salt, after thereto plus water is extracted, stirring mixes them thoroughly, rear to stand liquid separation and obtain organic phase and water phase, organic phase
It is purified after return step 4) in reuse, water phase is zinc solution.
2. the method according to claim 1, wherein in step 4) four picolyl ethylenediamine of chelating agent addition
Amount is 50~100mg/L.
3. method according to claim 1 or 2, which is characterized in that the pickle liquor of cupric described in step 1) 0.03- containing gold
0.06g/m3, argentiferous 0.01-0.05g/m3, cupric 1-10g/l, iron content 3-10g/l, 2-8kg/m containing zinc3。
4. according to the method described in claim 3, it is characterized in that, the pickle liquor of cupric described in step 1) is by such as lower section
What method obtained:
I is sized mixing roasting: gold and silver concentrate is sized mixing with water, control pulp density is 50~70wt%, after ore pulp is placed in 500~
Roast to obtain high-temperature flue gas and calcining at 650 DEG C, roasting refer to gold and silver concentrate make in calciner inflammable substance sulphur, arsenic, carbon,
The clean-burning process of the elements such as selenium, gained high-temperature flue gas enter sulfuric acid production process output arsenic trioxide product and sulphuric acid production
Product；
II acidleach: calcining being mixed with dilute sulfuric acid and is sized mixing, and control pulp density is 30-35wt%, after ore pulp is placed in 50~70
Acidleach is carried out under the conditions of DEG C, after will separation of solid and liquid obtain the pickle liquor of acid leaching residue and cupric containing gold and silver, acid of the gained containing gold and silver
Phase analysis enters recovery for Au and Ag system recycling gold and silver.
5. according to the method described in claim 4, it is characterized in that, the quality of dilute sulfuric acid described in step II acid leaching process is dense
Degree is 1-2.5wt%, and leaching time control is 2-4 hours.
6. method according to claim 1 or 2, which is characterized in that copper extractant described in step 3) is oximes extraction
Agent, beta-diketon kind of extractants, ternary amine extractant and compounding kind of extractants in any one, compound the preferred ketone of kind of extractants
Oxime is compounded with aldoxime.
7. method according to claim 1 or 2, which is characterized in that organic solvent described in step 4) be ethyl acetate,
Acetone, THF, DMSO, benzene,toluene,xylene, any one in DMF.
8. method according to claim 1 or 2, which is characterized in that the stirred tank in step 1) is 3-5 concatenated stirrings
Slot.
9. the method according to the description of claim 7 is characterized in that the mixing speed control of stirred tank is 50- in step 1)
80r/min。
10. method according to claim 1 or 2, which is characterized in that the control of adsorption process described in step 2) is 4-6
Hour.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110819815A (en) * | 2019-12-03 | 2020-02-21 | 山东国大黄金股份有限公司 | Waste acid purification method |
| CN114134325A (en) * | 2021-11-19 | 2022-03-04 | 湖南理工学院 | Method for improving selectivity of polymer containing membrane for separating different metal ions by using complexing agent |
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| CN114134325A (en) * | 2021-11-19 | 2022-03-04 | 湖南理工学院 | Method for improving selectivity of polymer containing membrane for separating different metal ions by using complexing agent |
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