CN106167319B - A method of recovery acid, niobium and tantalum in the acid pickle generated are smelted from niobium tantalum - Google Patents
A method of recovery acid, niobium and tantalum in the acid pickle generated are smelted from niobium tantalum Download PDFInfo
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- CN106167319B CN106167319B CN201610656503.3A CN201610656503A CN106167319B CN 106167319 B CN106167319 B CN 106167319B CN 201610656503 A CN201610656503 A CN 201610656503A CN 106167319 B CN106167319 B CN 106167319B
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/24—Obtaining niobium or tantalum
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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
- 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
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- 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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Abstract
Recovery acid, the method for niobium and tantalum in the acid pickle generated are smelted from niobium tantalum the invention discloses a kind of, this method is recycled using diffusion dialyzer；The following steps are included: the two sides of the diffusion dialysis film of (1) in diffusion dialyzer fill acid pickle and receiving liquid respectively, stand；(2) continue from the two sides of diffusion dialysis film to import acid pickle and receiving liquid in diffusion dialyzer, the recycling acid solution containing niobium and tantalum can be obtained after diffusion dialysis.The present invention while waste acid recovery can in waste acid recovery liquid 90% or more tantalum ion and 92% or more niobium ion, can also retain in acid pickle 85% ferrous ion, it is thus possible to reduce niobium, in tantalum pentoxide product iron content.
Description
Technical field
Field is re-used the present invention relates to waste acid resourceization more particularly to a kind of from the acid pickle that niobium tantalum smelts generation
The method of recovery acid, niobium and tantalum.
Background technique
Nb-Ta mineral is by hydrofluoric acid and sulfuric acid mixed-acid dissolution niobium tantalum, and the meeting after extracting tantalum niobium obtains acid pickle, the spent acid
Total acidity in liquid is 8.5-12mol/L, the also tantalum of the ferrous iron containing 2.5-3.6g/L, the niobium of 1.5-1.8g/L, 25-35mg/L
Equal metal ions, wherein niobium, tantalum ion and fluorine form hexafluoro niobium anion and hexafluoro tantalum anion, and iron is with ferrous cationic shape
Formula exists.These extraction acid pickles account for 5% or so of tantalum and niobium hydrometallurgy sewage, unprocessed that very big danger can be caused to environment
Evil, while vast resources being caused to waste.Therefore carrying out effectively processing to these acid pickles is always hot spot concerned by people.
Current processing method is mainly acid-base neutralization, evaporation absorption, extraction etc..Wherein, although in lime neutralisation energy
With the acid in waste water, Natural zeolite and sulfate ion can be also removed, processing cost is lower, but lime neutralisation is numerous in the presence of managing
The disadvantages of waste residue amount that is trivial, not easy to control, generating is big, the wasting of resources, the niobium tantalum being unable in waste acid recovery；Evaporation absorbs volatility
The method of acid requires harshness to processing equipment, to have the equipment of corrosion resistance, and it is all higher to operate and handle expense；Solvent
Extraction also needs to put into a large amount of extraction medicament, is only suitable for the recycling of the acid of high added economic value, is unable to waste acid recovery
In niobium, tantalum metal, cause the niobium tantalum in spent acid to be lost.Therefore, it studies a kind of simple and effective and economic and environment-friendly from niobium tantalum smelting
Recovery acid, the method for niobium and tantalum in the acid pickle generated are refined, is necessary.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide a kind of simple and effective and economic and environment-friendly
Slave niobium tantalum smelt recovery acid, the method for niobium and tantalum in the acid pickle generated, both there is cleaning, stable, efficient, easy-operating spy
Point, and niobium tantalum can be smelted to acid, niobium and tantalum synthetical recovery in the acid pickle generated.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A method of recovery acid, niobium and tantalum in the acid pickle generated being smelted from niobium tantalum, this method utilizes diffusion dialyzer
It is recycled；The following steps are included:
(1) two sides of the diffusion dialysis film in diffusion dialyzer fill acid pickle and receiving liquid respectively, stand；
(2) continue from the two sides of diffusion dialysis film to import acid pickle and receiving liquid in diffusion dialyzer, through diffusion dialysis
The recycling acid solution containing niobium and tantalum is obtained afterwards.
Above-mentioned method, it is preferred that return to the wet process smelting of niobium tantalum containing the recycling acid solution of niobium and tantalum obtained in the step (2)
During refining.
Above-mentioned method, it is preferred that the acid pickle is derived from the waste liquid of niobium tantalum hydrometallurgy generation, and hydrometallurgy is
Niobium tantalum is leached using sulfuric acid and hydrofluoric acid.
Above-mentioned method, it is preferred that in the acid pickle main acid ingredient and its concentration be respectively as follows: sulfuric acid 2.8~
4.1mol/L, 2.5~3.5mol/L of hydrofluoric acid, total acidity are 8.5~12mol/L；The major metal contained in the acid pickle
Ion and its concentration are as follows: 2.5~3.6g/L of ferrous ion, 1.5~1.8g/L of niobium ion, 30~38.2mg/L of tantalum ion.
Above-mentioned method, it is preferred that, the flow direction of the acid pickle and receiving liquid that import in diffusion dialyzer is on the contrary, institute
The flow velocity for stating acid pickle is 8~12mL/min；The flow velocity of the acid pickle and the velocity ratio of receiving liquid are 1:(1~1.2).This hair
The bright two sides in anion-exchange membrane each lead into acid pickle and acceptable solution (water), using counter-current operation, by controlling acid pickle
Flow velocity in diffusion dialyzer of flow velocity and receiving liquid regulate and control to acid, the recovery efficiency of metal ion and ferrous ion
Rejection.After stabilization, the concentration of the acid of recovered liquid and raffinate is measured with the method for acid base titration, is measured with the method for Atomic absorption
The concentration of metal ion can calculate the rejection of acid and niobium, the rate of recovery of tantalum ion and ferrous iron.
Above-mentioned method, it is preferred that the time stood in the step (1) is 2~4 hours.
Above-mentioned method, it is preferred that the receiving liquid is water.
Above-mentioned method, it is preferred that the acid pickle needs to filter before importing diffusion dialyzer, removes in acid pickle
Suspended matter, filter process are filtered using the accurate filter of the polytetrafluoroethylene (PTFE) filter core material in 5 microns of aperture；The acid pickle and
Receiving liquid is imported in diffusion dialyzer by peristaltic pump.
Above-mentioned method, it is preferred that the diffusion dialyzer is mainly made of diffusion dialysis film, partition and clamping device；
The diffusion dialysis film is anion-exchange membrane；The positive electroactive group of lotus in the anion-exchange membrane be organic amine sun from
Son.Attract the acid ion in (pairing) acid pickle using organic amine cation electropositive, acid ion can be freely combined with
Machine amine positive charged group can form negatively charged ions migrating channels, the gold in acid pickle under the promotion of concentration difference on fenestra
Film can not be penetrated under the repulsion of organic amine cation group by belonging to cation, effect of the hydrogen ion in feed liquid in hydrated ion
Under, the other side for being paired to film can be carried out with acid ion, realize the recycling separation of acid.
Above-mentioned method, it is preferred that the diffusion dialyzer be by 31~39 anion-exchange membranes, 32~40 every
Plate, 64~80 gaskets and metal shell composition；Wherein the area of every anion-exchange membrane is 200mm × 400mm, the thickness of film
Degree is 0.15mm, and the effective dialysis area of diffusion dialyzer is 2.48~3.12 square metres.It is further preferred that it is described yin from
Proton exchange is selected from the anion-exchange membrane of Shandong Tianwei Membrane Technology Co., Ltd.'s production.
Niobium tantalum of the invention is smelted in the acid pickle generated, other than ferrous ion, there are also niobium, tantalum ion, and niobium, tantalum
Hydrometallurgy be niobium tantalum is leached using sulfuric acid and hydrofluoric acid, so niobium, tantalum ion and fluorine be readily formed hexafluoro tantalic acid root yin from
Son (TaF6 -), five fluorotantalic acid root (TaF5 2-), hexafluoro niobic acid root (NbF6 -), five fluorine oxygen close niobium (NbOF5 2-) etc., these anion
It can be entered in receiving liquid (water) by anion-exchange membrane as sulfate radical, fluorine ion, obtain the recycling containing niobium and tantalum
Acid solution；Simultaneously as H+Ionic hydration radius it is small, charge is low, active height, so compared to Fe2+For, H+Appearance can be compared
It changes places and reaches the anion bindings such as receiving liquid side (water side) and sulfate radical, fluorine ion generation sulfuric acid and hydrofluoric acid through film to meet
Electroneutral requirement in solution, and Fe2+Mainly by from amberplex to its stronger friction effect and sieve effect without
Anion-exchange membrane can be penetrated, is blocked in acid pickle.
The present invention is by flow velocity of flow velocity and the receiving liquid of regulation acid pickle in diffusion dialyzer and is used in combination specific
The anion-exchange membrane of the positive electroactive group of lotus, to realize that acid, metal ion are separated with ferrous ion.
Compared with the prior art, the advantages of the present invention are as follows:
(1) present invention can recycle the acid in the acid pickle that niobium tantalum hydrometallurgy generates, energy by the method for diffusion dialysis
85% or more acid in enough waste acid recovery liquid, restored acid can be used to molten mine and washup, while reduce by 80% or more spent acid
Processing cost reduces the disposal costs of sludge silt, with good economic efficiency.
(2) niobium of the present invention 90% or more tantalum ion and 92% or more in energy waste acid recovery liquid while waste acid recovery
Ion can also retain in acid pickle 85% ferrous ion, it is thus possible to reduce niobium, in tantalum pentoxide product iron content.
(3) for the present invention using the acid in diffusive dialysis method waste acid recovery liquid, operation energy consumption is very low, expense is low, cleans, is steady
It is fixed, efficient, easy to operate, to environment almost without pollution the advantages that.Therefore the present invention is to solve using diffusive dialysis method recovery acid
Niobium tantalum smelts a kind of simple and effective and economic and environment-friendly method of acid pickle problem, has important application value.
Detailed description of the invention
Fig. 1 is used diffusion dialyzer schematic diagram of the invention.
Fig. 2 is the flow chart of the invention that recovery acid, the method for niobium and tantalum in the acid pickle generated are smelted from niobium tantalum.
Marginal data:
1, acid pickle import；2, recycling acid solution outlet；3, receiving liquid import；4, raffinate exports；5, clamping plate；6, anion
Exchange membrane；7, partition.
Specific embodiment
To facilitate the understanding of the present invention, the present invention is made below in conjunction with Figure of description and preferred embodiment more complete
Face meticulously describes, but the protection scope of the present invention is not limited to the following specific embodiments.
Unless otherwise defined, all technical terms used hereinafter and the normally understood meaning of those skilled in the art
It is identical.Technical term used herein is intended merely to the purpose of description specific embodiment, is not intended to the limitation present invention
Protection scope.
Except there is a special instruction, the various reagents used in the present invention, raw material be can commodity commercially or
Person can the product as made from well known method.
Embodiment 1:
A kind of recovery acid, the method for niobium and tantalum of the invention from the acid pickle that niobium tantalum smelts generation, this method is using such as
Diffusion dialyzer shown in FIG. 1 is recycled, which is mainly consolidated by anion-exchange membrane 6, partition 7 and clamping plate 5
Surely it forms, acid pickle import 1, recycling acid solution outlet 2, receiving liquid import 3, raffinate outlet 4 is provided in the diffusion dialyzer；It should
In diffusion dialyzer specifically by 31 anion-exchange membranes (the positive electroactive group of lotus in anion-exchange membrane be organic amine sun from
Son is produced by Dong Tianwei membrane technology Co., Ltd), 32 partitions, 64 gaskets and metal shell form；Every anion exchange
Membrane area 200mm × 400mm, with a thickness of 0.15mm, 2.48 square metres of the effective area of diffusion dialyzer.
The slave niobium tantalum of the present embodiment smelts recovery acid, the method for niobium and tantalum in the acid pickle generated, main flow reference
Such as Fig. 2, specifically includes the following steps:
(1) the acid pickle import 1 and receiving liquid import 3 of the diffusion dialysis film two sides in diffusion dialyzer are injected separately into useless
Acid solution and tap water, and diffusion dialyzer is filled, stand 2 hours；
(2) acid pickle (concentration of each substance is as shown in table 1 in acid pickle) in waste water tank is pumped into accurate filter, led to
Accurate filter (the polytetrafluoroethylene (PTFE) filter core that filter core is 5 microns of aperture) filtering is crossed, the suspended matter in spent acid is removed；Then with compacted
Acid pickle is introduced into diffusion dialyzer by dynamic pump from acid pickle import 1, and the flow velocity of peristaltic pump is 10mL/min；Tap water is also used compacted
Dynamic pump is introduced into diffusion dialyzer from receiving liquid import 3, and the flow velocity of tap water is 10mL/min；Recycling acid solution containing niobium and tantalum from
2 outflow of acid solution outlet is recycled, ferrous ion is trapped in raffinate, from 4 outflow of raffinate outlet.
The concentration such as table 1 of the present embodiment recovery acid and hydrogen ion in raffinate and niobium, tantalum, ferrous ion is measured respectively,
The rate of recovery 89.4% of acid, the rate of recovery 96.4% of niobium, the rate of recovery 93.7% of tantalum, the rejection of ferrous ion are 87%.
Each material concentration in 1 solution of table
| Unit | mol/L | mol/L | g/L | mg/L | g/L |
| Ion classification | H2SO4 | HF | Nb | Ta | Fe |
| Former spent acid | 3.0 | 2.5 | 1.68 | 33.5 | 3.29 |
| Recycle acid solution | 2.7 | 2..2 | 1.62 | 31.4 | 0.43 |
| Raffinate | 0.3 | 0.3 | 0.06 | 2.12 | 2.87 |
Embodiment 2:
A kind of recovery acid, the method for niobium and tantalum of the invention from the acid pickle that niobium tantalum smelts generation, this method is using such as
Diffusion dialyzer shown in FIG. 1 is recycled, which is mainly consolidated by anion-exchange membrane 6, partition 7 and clamping plate 5
Surely it forms, acid pickle import 1, recycling acid solution outlet 2, receiving liquid import 3, raffinate outlet 4 is provided in the diffusion dialyzer；It should
Specifically by 35, (the positive electroactive group of lotus in anion-exchange membrane is organic amine cation, is tieed up by eastern day in diffusion dialyzer
Membrane technology Co., Ltd production), 36 partitions, 72 gaskets and metal shell composition；Every anion exchange membrane area 200mm
× 400mm, with a thickness of 0.15mm, 2.8 square metres of diffusion dialyzer effective area.
The slave niobium tantalum of the present embodiment smelts recovery acid, the method for niobium and tantalum in the acid pickle generated, main flow reference
Such as Fig. 2, specifically includes the following steps:
(1) the acid pickle import 1 and receiving liquid import 3 of the diffusion dialysis film two sides in diffusion dialyzer are injected separately into useless
Acid solution and tap water, and diffusion dialyzer is filled, stand 3 hours；
(2) acid pickle (concentration of each substance is as shown in table 2 in acid pickle) in waste water tank is pumped into accurate filter, led to
Accurate filter (the polytetrafluoroethylene (PTFE) filter core that filter core is 5 microns of aperture) filtering is crossed, the suspended matter in spent acid is removed；Then with compacted
Acid pickle is introduced into diffusion dialyzer by dynamic pump from acid pickle import 1, and the flow velocity of peristaltic pump is 8mL/min；Tap water is also used compacted
Dynamic pump is introduced into diffusion dialyzer from receiving liquid import 3, and the flow velocity of tap water is 8.8mL/min；Recycling acid solution containing niobium and tantalum
From 2 outflow of recycling acid solution outlet, ferrous ion is trapped in raffinate, from 4 outflow of raffinate outlet.
The concentration such as table 2 of recovery acid and hydrogen ion in raffinate and niobium, tantalum, ferrous ion, sour recycling are measured respectively
Rate 91.3%, the rate of recovery 93.9% of niobium, the rate of recovery 90.3% of tantalum, the rejection of ferrous ion are 89.9%.
Each material concentration in 2 solution of table
| Unit | mol/L | mol/L | g/L | mg/L | g/L |
| Ion classification | H2SO4 | HF | Nb | Ta | Fe |
| Former spent acid | 4.1 | 3.3 | 1.79 | 38.2 | 3.46 |
| Recycle acid solution | 3.7 | 2.71 | 1.53 | 31.5 | 0.32 |
| Raffinate | 0.4 | 0.59 | 0.11 | 3.71 | 3.11 |
Embodiment 3:
A kind of recovery acid, the method for niobium and tantalum of the invention from the acid pickle that niobium tantalum smelts generation, this method is using such as
Diffusion dialyzer shown in FIG. 1 is recycled, which is mainly consolidated by anion-exchange membrane 6, partition 7 and clamping plate 5
Surely it forms, acid pickle import 1, recycling acid solution outlet 2, receiving liquid import 3, raffinate outlet 4 is provided in the diffusion dialyzer；It should
Specifically by 39, (the positive electroactive group of lotus in anion-exchange membrane is organic amine cation, is tieed up by eastern day in diffusion dialyzer
Membrane technology Co., Ltd production), 40 partitions, 80 gaskets and metal shell composition；Every anion exchange membrane area 200mm
× 400mm, with a thickness of 0.15mm, 3.12 square metres of diffusion dialyzer effective area.
The slave niobium tantalum of the present embodiment smelts recovery acid, the method for niobium and tantalum in the acid pickle generated, main flow reference
Such as Fig. 2, specifically includes the following steps:
(1) the acid pickle import 1 and receiving liquid import 3 of the diffusion dialysis film two sides in diffusion dialyzer are injected separately into useless
Acid solution and tap water, and diffusion dialyzer is filled, stand 4 hours；
(2) acid pickle (concentration of each substance is as shown in table 3 in acid pickle) in waste water tank is pumped into accurate filter,
By accurate filter (the polytetrafluoroethylene (PTFE) filter core that filter core is 5 microns of aperture) filtering, the suspended matter in spent acid is removed；Then it uses
Acid pickle is introduced into diffusion dialyzer by peristaltic pump from acid pickle import 1, and the flow velocity of peristaltic pump is 12mL/min；Tap water is also used
Peristaltic pump is introduced into diffusion dialyzer from receiving liquid import 3, and the flow velocity of tap water is 14.4mL/min；Recovery acid containing niobium and tantalum
Liquid is trapped in raffinate from 2 outflow of recycling acid solution outlet, ferrous ion, from 4 outflow of raffinate outlet.
The concentration such as table 3 of the present embodiment recovery acid and hydrogen ion in raffinate and niobium, tantalum, ferrous ion is measured respectively,
The rate of recovery 86.0% of acid, the rate of recovery 92.9% of niobium, the rate of recovery 94.5% of tantalum, the rejection of ferrous ion are 85.6%.
Each material concentration in 3 solution of table
| Unit | mol/L | mol/L | g/L | mg/L | g/L |
| Ion classification | H2SO4 | HF | Nb | Ta | Fe |
| Former spent acid | 2.8 | 3.5 | 1.55 | 30.9 | 2.52 |
| Recovery acid | 2.56 | 3.34 | 1.30 | 24.3 | 1.80 |
| Raffinate | 0.24 | 0.16 | 0.11 | 1.70 | 0.36 |
Claims (7)
1. a kind of smelt recovery acid, the method for niobium and tantalum in the acid pickle generated from niobium tantalum, which is characterized in that this method utilizes expansion
Scattered dialyzer is recycled；The following steps are included:
(1) two sides of the diffusion dialysis film in diffusion dialyzer fill acid pickle and receiving liquid respectively, stand；The acid pickle
It is derived from the waste liquid of niobium tantalum hydrometallurgy generation, and hydrometallurgy is to leach niobium tantalum using sulfuric acid and hydrofluoric acid；
(2) continue from the two sides of diffusion dialysis film to import acid pickle and receiving liquid in diffusion dialyzer, after diffusion dialysis i.e.
Obtain the recycling acid solution containing niobium and tantalum；The flow direction of the acid pickle and receiving liquid that import in diffusion dialyzer is on the contrary, described useless
The flow velocity of acid solution is 8~12mL/min；The flow velocity of the acid pickle and the velocity ratio of receiving liquid are 1:(1~1.2)；The diffusion
Dialyzer is mainly made of diffusion dialysis film, partition and clamping device；The diffusion dialysis film is anion-exchange membrane；The yin
The positive electroactive group of lotus in amberplex is organic amine cation.
2. the method as described in claim 1, which is characterized in that the recycling acid solution obtained in the step (2) containing niobium and tantalum
It returns in niobium tantalum wet smelting process.
3. the method as described in claim 1, which is characterized in that main acid ingredient and its concentration difference in the acid pickle
Are as follows: 2.8~4.1mol/L of sulfuric acid, 2.5~3.5mol/L of hydrofluoric acid, total acidity are 8.5~12mol/L；Contain in the acid pickle
Some primary metal ions and its concentration are as follows: 2.5~3.6g/L of ferrous ion, 1.5~1.8g/L of niobium ion, tantalum ion 30~
38.2mg/L。
4. method according to any one of claims 1 to 3, which is characterized in that the time stood in the step (1) is 2
~4 hours.
5. method according to any one of claims 1 to 3, which is characterized in that the receiving liquid is water.
6. method according to any one of claims 1 to 3, which is characterized in that the acid pickle is importing diffusion dialyzer
It is needed before by filtration treatment；The acid pickle and receiving liquid are imported in diffusion dialyzer by peristaltic pump.
7. the method as described in claim 1, which is characterized in that the diffusion dialyzer is by 31~39 anion exchanges
Film, 32~40 partitions, 64~80 gaskets and metal shell composition；Wherein the area of every anion-exchange membrane is 200mm
× 400mm, with a thickness of 0.15mm；The effective dialysis area of diffusion dialyzer is 2.48~3.12 square metres.
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| CN101597095A (en) * | 2008-06-05 | 2009-12-09 | 佳科太阳能硅(厦门)有限公司 | The recovery treatment method of waste acid of smelting silicon by wet process |
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| CN101597095A (en) * | 2008-06-05 | 2009-12-09 | 佳科太阳能硅(厦门)有限公司 | The recovery treatment method of waste acid of smelting silicon by wet process |
| CN104445095A (en) * | 2014-12-18 | 2015-03-25 | 中南大学 | Method for purifying smelting waste acid |
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