CN109837384A - A kind of sodium roasting vanadium-extracting technique - Google Patents
A kind of sodium roasting vanadium-extracting technique Download PDFInfo
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Abstract
The present invention relates to vanadium metallurgical technology fields, disclose a kind of sodium roasting vanadium-extracting technique.The technique includes sodium roasting, leaching, precipitation, recycling sodium salt, wherein precipitation step uses ammonium carbonate precipitation, deposition vanadium mother liquid ingredient is based on sodium bicarbonate, the sodium bicarbonate crude product obtained after being completely distilled off returns to sodium operation, sodium is recycled, traditional handicraft is avoided using ammonium sulfate and ammonium chloride precipitation bring environmental issue, solves sodium sulphate or sodium chloride slag muck product, unavailable problem in production.It is significant to reduce production cost, environmental benefit for its simple process.Further, carrying out distillation procedure to deposition vanadium mother liquid includes deamination distillation and redistillation, and the weak aqua ammonia that deamination distills can return to precipitation step and continue precipitation, therefore excess of ammonia is recycled when precipitation；The distilled water that the redistillation of deposition vanadium mother liquid obtains, which returns, leaches operation, and water obtains circulation and uses, and realizes sodium roasting vanadium-extracting wastewater zero discharge.
Description
Technical field
The present invention relates to vanadium metallurgical technology fields, in particular to a kind of sodium roasting vanadium-extracting technique.
Background technique
Sodium roasting vanadium-extracting technique is technique more traditional in extraction vanadium method, and principle is to roast the vanadium of slightly solubility
It is converted into sodium vanadate soluble easily in water in the process, then can get vanadium product by processes such as leaching, precipitation, calcinings.Sodium carbonate or
Sodium bicarbonate roasts after mixing according to a certain percentage with vanadium-containing material at high temperature as additive common in sodium roasting,
Obtain roasting clinker；Roasting clinker is gone out with water logging again, adds ammonium sulfate or ammonium chloride precipitation after obtaining vanadium leachate, is obtained partially
Ammonium vanadate and deposition vanadium mother liquid；Ammonium metavanadate obtains the V that purity is greater than 98% after calcining2O5, and deposition vanadium mother liquid is that high concentration contains sodium
Waste water contains other metal impurities ions simultaneously, is unable to direct circulation utilization.Directly by deposition vanadium mother liquid evaporating completely in production,
Although can be with reuse after vapor condensation, evaporating slag be the mixing based on sodium sulphate or sodium chloride and contained a large amount of impurities
Object, can neither Returning utilization, can not be sold as product, manufacturing enterprise's environmental protection pressure is big.Sodium in sodium roasting vanadium-extracting technique
Cannot recycle is the bottleneck problem for perplexing the technique and being unable to large-scale promotion application.
It in existing some techniques, will be leached again after vanadium-containing material sodium roasting, leachate crystallisation by cooling removing sodium, sodium salt returns
Process, then purification and impurity removal are roasted, the solution after removal of impurities adds the organic matters such as ethylenediamine complexing vanadium, then is adjusted with acid pH to 1.0
~7.5, crystallisation by cooling adds ammonium chloride solution after vanadium complex is precipitated, and obtains purification containing vanadium complex, then calcine to obtain vanadium
Oxide.Although the technique can obtain the higher barium oxide of purity, complex process, long flow path, the solution sodium after removing sodium
Content may be still higher；The organic complexing agent of precipitation process addition is at high cost；It adds ammonium chloride solution and turns brilliant purification, so that turning crystalline substance
Contain a large amount of chloride ions in mother liquor, the chloride ion constantly accumulated in production will make environmental protection of enterprise pressure huge.Therefore, the technology is real
Border is difficult to be truly realized sodium to be recycled completely, it is also difficult to really be realized wastewater zero discharge, can not be realized clean manufacturing from source.
To sum up, existing some techniques are although vanadic anhydride can be obtained, and the deposition vanadium mother liquid generated is with sodium sulphate, chlorine
Change based on sodium, sodium slag obtained by subsequent evaporation is difficult to recycle, and the sodium slag of circulative accumulation will lead to serious environmental issue.
Summary of the invention
The purpose of the present invention is to provide a kind of sodium roasting vanadium-extracting technique, simple processes, the circulation for realizing sodium salt
It utilizes, reduces production cost and more environmentally-friendly.
The embodiment of the present invention is achieved in that
A kind of sodium roasting vanadium-extracting technique comprising:
Sodium roasting: vanadium-containing material being mixed with sodium salt, is roasted, to obtain roasting clinker；
It leaches: water logging being carried out to roasting clinker, to obtain leached mud and containing the leachate of vanadium；
Precipitation: ammonium carbonate is mixed in the environment of pH value is 8~10 with leachate, then is separated by solid-liquid separation, to obtain inclined vanadium
Sour ammonium and deposition vanadium mother liquid, ammonium metavanadate are used to prepare vanadic anhydride；
It recycles sodium salt: distillation procedure being carried out to deposition vanadium mother liquid, using crystallisation by cooling, sodium bicarbonate is obtained by filtration slightly produces
Product, sodium bicarbonate crude product are back to sodium roasting step as raw material.
In optional embodiment of the present invention, include: to the step of deposition vanadium mother liquid progress distillation procedure
Deamination distillation is carried out to deposition vanadium mother liquid, to obtain weak aqua ammonia and evaporated mother liquor；
Redistillation is carried out under the conditions of 70~100 DEG C to evaporated mother liquor.
In optional embodiment of the present invention, the weak aqua ammonia that deamination distills is back to precipitation step as raw material.
In optional embodiment of the present invention, the evaporation capacity control of deamination distillation is the 5~20% of deposition vanadium mother liquid total volume.
In optional embodiment of the present invention, redistillation is vacuum distillation.
In optional embodiment of the present invention, sodium salt in sodium roasting step be sodium carbonate, in sodium bicarbonate at least
It is a kind of.
In optional embodiment of the present invention, recycles in sodium salt step, sodium bicarbonate crude product and filtering is obtained by filtration
Mother liquor, filtrated stock is for carrying out redistillation after mixing with the evaporated mother liquor in distillation procedure next time.
In optional embodiment of the present invention, in precipitation step, full nitrogen in ammonium carbonate rubs with the full vanadium in leachate
You are than being (3~8): 1.
In optional embodiment of the present invention, in precipitation step, after ammonium carbonate is mixed with leachate, it is passed through CO2Keep molten
Liquid pH value is stirred simultaneously for 8~10, then is separated by solid-liquid separation.
In optional embodiment of the present invention, vanadium-containing material be vanadium titano-magnetite, bone coal navajoite, steel-making vanadium slag in one
Kind, vanadium grade is 5~30%.
The beneficial effect of the embodiment of the present invention is:
The embodiment of the present invention includes sodium roasting, leaching, precipitation, recycling sodium salts, and wherein precipitation step uses carbon
Sour ammonia-sinking vanadium, based on sodium bicarbonate, the sodium bicarbonate crude product obtained after being completely distilled off returns to sodium and makees deposition vanadium mother liquid ingredient
Industry, sodium are recycled, and avoid traditional handicraft using ammonium sulfate and ammonium chloride precipitation bring environmental issue, solve life
Sodium sulphate or sodium chloride slag muck product, unavailable problem in production.It is aobvious to reduce production cost, environmental benefit for its simple process
It writes.Further, carrying out distillation procedure to deposition vanadium mother liquid includes deamination distillation and redistillation, and the weak aqua ammonia that deamination distills can
It returns to precipitation step and continues precipitation, therefore excess of ammonia is recycled when precipitation；The steaming that the redistillation of deposition vanadium mother liquid obtains
Distilled water, which returns, leaches operation, and water obtains circulation and uses, and realizes sodium roasting vanadium-extracting wastewater zero discharge.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the flow chart of sodium roasting vanadium-extracting technique in the embodiment of the present invention.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Sodium roasting vanadium-extracting technique of the embodiment of the present invention is specifically described below.
Fig. 1 is the flow chart of sodium roasting vanadium-extracting technique in the embodiment of the present invention.Incorporated by reference to Fig. 1, the embodiment of the present invention is mentioned
The sodium roasting vanadium-extracting technique of confession roast for vanadium-containing material-leach vanadium extraction.The vanadium-containing material utilized can be navajoite,
Such as vanadium titano-magnetite, bone coal navajoite, it is also possible to obtained v-bearing steel slag in metallurgical process.Optionally, before firing
Vanadium-containing material can be screened, enabling the vanadium grade of vanadium-containing material is 5~30%, to improve vanadium extraction effect.Vanadium grade can be
5%, any point value in 10%, 18%, 29.5%, 30% or appoint value between two o'clock.Sodium roasting vanadium-extracting technique include with
Lower step.
One, sodium roasting
The step includes mixing vanadium-containing material with sodium salt, roasting, to obtain roasting clinker.Wherein, sodium salt can be carbon
One of sour sodium, sodium bicarbonate or two kinds of mixture.Optionally, sodium salt accounts for the 5~30% of vanadium-containing material, in the ratio
The roasting clinker obtained under example is conducive to subsequent leaching process for extracting vanadium, also avoids the waste of raw material.The roasting of sodium roasting
Temperature is controlled at 550~900 DEG C, and certain time finally obtains roasting clinker sufficiently to react.
Two, it leaches
The step includes carrying out water logging to roasting clinker, to obtain leached mud and containing the leachate of vanadium.In the step, it will roast
Overburnt material and water are mixed, and the mass ratio of the two mixing is 1:(1~4), it, can be to mixing later according to actual environment needs
Object is heated, and temperature is controlled at 25~80 DEG C, so that the leaching of roasting clinker is more abundant.It is stirred under the conditions of this temperature
1~5h, agitating mode and frequency can be selected as needed.It is separated by solid-liquid separation after stirring, obtains leachate and leaching
Slag.
Three, precipitation
The step includes mixing ammonium carbonate in the environment of pH value is 8~10 with leachate, then be separated by solid-liquid separation, with
Ammonium metavanadate and deposition vanadium mother liquid are obtained, ammonium metavanadate is used to prepare vanadic anhydride.In the step, leachate is mixed with ammonium carbonate
After react, vanadium is with ammonium metavanadate precipitate, to separate with deposition vanadium mother liquid.
Optionally, ammonium carbonate is added in leachate in the form of sal volatile, in ammonium carbonate in full nitrogen and leachate
The molar ratio of full vanadium is (3~8): 1.After sal volatile is added in leachate, by being passed through CO2Mode keep pH value of solution
Value is 8~10, and 1~5h is stirred under the conditions of 25~70 DEG C, is separated by solid-liquid separation later, obtains ammonium metavanadate and precipitation is female
Liquid.
Four, it calcines
The resulting ammonium metavanadate of precipitation step is calcined under the conditions of 450~600 DEG C, obtains V2O5Product completes vanadium
It extracts.
Five, sodium salt is recycled
After step 3, distillation procedure is carried out to the deposition vanadium mother liquid that precipitation step obtains, using crystallisation by cooling, filtering
Sodium bicarbonate crude product is obtained, sodium bicarbonate crude product is back to sodium roasting step as raw material.Further, distillation procedure
Include:
1, deamination distillation is carried out to deposition vanadium mother liquid, to obtain weak aqua ammonia and evaporated mother liquor.Wherein, the evaporation capacity of deposition vanadium mother liquid
Control the 5~20% of deposition vanadium mother liquid total volume before it is distilled.Weak aqua ammonia is separated as volatile matter with evaporated mother liquor, and the institute that is condensed
It collects.It collects obtained weak aqua ammonia and is back to precipitation step as raw material, for example, ammonium carbonate used in precipitation step can be by this
The weak aqua ammonia that step obtains is prepared.
2, resulting evaporated mother liquor is distilled to deamination and carries out redistillation under the conditions of 70~100 DEG C.Redistillation is that decompression is steamed
It evaporates, the boiling point of water reduces, and partial moisture can be evaporated and is recovered as distilled water, and the distilled water of recycling can be used as leaching step
Rapid uses water, therefore water is recycled, and realizes wastewater zero discharge.Evaporated mother liquor is concentrated after redistillation, then through cooling
Crystallization, sodium bicarbonate is precipitated, by the way that sodium bicarbonate crude product and filtrated stock is obtained by filtration.Sodium bicarbonate crude product can be used as
Raw material is back to sodium roasting step.And in filtrated stock also contain part sodium bicarbonate, therefore filtrated stock can with it is next
After secondary deamination distills resulting evaporated mother liquor mixing, redistillation is carried out again.Filtrated stock is back to redistillation step, it can be with
Increase the rate of recovery of sodium bicarbonate.
By above-mentioned distillation procedure, each material (including sodium salt, water, ammonium hydroxide) can recycle in this process, make
The cost for obtaining process for extracting vanadium reduces, more economical environmental protection.It should be appreciated that filtering is female in some optional embodiments of the present invention
Liquid can also be used as liquid waste processing or be used as other purposes, and the resulting weak aqua ammonia of distillation procedure, distilled water are also used as other
Purposes is not limited solely to above-mentioned cited circulation by way of.
Using above-mentioned sodium roasting vanadium-extracting technique, the vanadic anhydride product that purity is greater than 98%, precipitation rate can get
Greater than 99%, vanadium overall recovery is greater than 90%.Vanadium extraction effect is good, and entire process economics environmental protection.
Sodium roasting vanadium-extracting technique is described in detail below by way of specific embodiment.
Embodiment 1
Vanadium-containing material used in the present embodiment is the converter slag of essence containing vanadium of vanadium titano-magnetite steel-making, and vanadium grade is 18%,
The sodium salt is sodium carbonate.
The sodium roasting vanadium-extracting technique of the present embodiment includes:
(1) sodium roasting: according to the mass percent of vanadium-containing material, 15% sodium salt is mixed with vanadium-containing material, 800
It is roasted under the conditions of DEG C, obtains roasting clinker；
(2) it leaches: roasting clinker being mixed with water according to mass ratio for 1:1.5, mill leaching 1h, solid-liquid under the conditions of about 70 DEG C
Separation, obtains leachate and leached mud；
(3) precipitation: the molar ratio according to vanadium complete in nitrogen complete in ammonium carbonate and leachate is 5:1, ammonium carbonate is added described in
In leachate, it is passed through CO2Keeping solution ph is 9, stirs 2h under the conditions of 60 DEG C, is separated by solid-liquid separation, and obtains ammonium metavanadate and sinks
Vanadium mother liquid；
(4) it calcines: the ammonium metavanadate being calcined under the conditions of 550 DEG C, obtains V2O5Product；
(5) it recycling sodium salt: deposition vanadium mother liquid is subjected to deamination distillation, control evaporation capacity is the 10% of deposition vanadium mother liquid total volume,
Weak aqua ammonia and evaporated mother liquor are obtained, weak aqua ammonia returns to precipitation in next step (3)；Under the conditions of 70 DEG C further by evaporated mother liquor
Vacuum distillation.Crystallisation by cooling, filtering are carried out to the evaporated mother liquor after concentration, obtain distilled water, sodium bicarbonate crude product and filtering
Mother liquor, distilled water return step (2) is middle to be leached, and roasting, filtrated stock enter next time in sodium bicarbonate crude product return step (1)
Distillation and concentration.
The V that the present embodiment obtains2O5Product purity is 98.9%, and the V leaching rate of the present embodiment is 96.9%, the present embodiment
Precipitation rate be 99.5%, vanadium overall recovery be 96.4%.
Embodiment 2
Vanadium-containing material used in the present embodiment is the converter slag of essence containing vanadium of vanadium titano-magnetite steel-making, and vanadium grade is 18%,
The sodium salt is the sodium bicarbonate crude product that embodiment 1 recycles.
The sodium roasting vanadium-extracting technique of the present embodiment includes:
(1) sodium roasting: according to the mass percent of vanadium-containing material, 25% sodium salt is mixed with vanadium-containing material, 850
It is roasted under the conditions of DEG C, obtains roasting clinker；
(2) it leaches: roasting clinker being mixed with water according to mass ratio for 1:1.5, mill leaching 1h, solid-liquid under the conditions of about 70 DEG C
Separation, obtains leachate and leached mud；
(3) precipitation: the molar ratio according to vanadium complete in nitrogen complete in ammonium carbonate and leachate is 5:1, embodiment 1 is recycled dilute
The ammonium carbonate that ammonium hydroxide is prepared is added in leachate, is passed through CO2Keeping solution ph is 9.5, stirs 2h, solid-liquid under the conditions of 60 DEG C
Separation, obtains ammonium metavanadate and deposition vanadium mother liquid；
(4) it calcines: the ammonium metavanadate being calcined under the conditions of 550 DEG C, obtains V2O5Product；
(5) it recycling sodium salt: deposition vanadium mother liquid is subjected to deamination distillation, control evaporation capacity is the 10% of deposition vanadium mother liquid total volume,
Weak aqua ammonia and evaporated mother liquor are obtained, weak aqua ammonia returns to precipitation in next step (3)；By evaporated mother liquor and the resulting mistake of embodiment 1
It filters mother liquor to merge, be further evaporated under reduced pressure under the conditions of 70 DEG C.Crystallisation by cooling, filtering are carried out to the evaporated mother liquor after concentration, obtained
To distilled water, sodium bicarbonate crude product and filtrated stock, distilled water return step (2) is middle to be leached, and bicarbonate hydrogen sodium crude product is returned
It returns roasting, filtrated stock in step (1) and enters next distillation and concentration.
The V that the present embodiment obtains2O5Product purity is 99.0%, and the V leaching rate of the present embodiment is 96.5%, the present embodiment
Precipitation rate be 99.4%, vanadium overall recovery be 95.9%.
Embodiment 3
Vanadium-containing material used in the present embodiment is the converter slag of essence containing vanadium of vanadium titano-magnetite steel-making, and vanadium grade is 5%, institute
Stating sodium salt is sodium bicarbonate.
The sodium roasting vanadium-extracting technique of the present embodiment includes:
(1) sodium roasting: according to the mass percent of vanadium-containing material, 5% sodium salt is mixed with vanadium-containing material, 850
It is roasted under the conditions of DEG C, obtains roasting clinker；
(2) it leaches: roasting clinker being mixed with water according to mass ratio for 1:3, mill leaching 2h, solid-liquid point under the conditions of about 25 DEG C
From obtaining leachate and leached mud；
(3) precipitation: the molar ratio according to vanadium complete in nitrogen complete in ammonium carbonate and leachate is 3:1, and ammonium carbonate is added and is leached
In liquid, it is passed through CO2Keeping solution ph is 9.5, stirs 5h under the conditions of 25 DEG C, is separated by solid-liquid separation, obtains ammonium metavanadate and precipitation
Mother liquor；
(4) it calcines: the ammonium metavanadate being calcined under the conditions of 450 DEG C, obtains V2O5Product；
(5) it recycling sodium salt: deposition vanadium mother liquid is subjected to deamination distillation, control evaporation capacity is the 20% of deposition vanadium mother liquid total volume,
Weak aqua ammonia and evaporated mother liquor are obtained, weak aqua ammonia returns to precipitation in next step (3)；Under the conditions of 98 DEG C further by evaporated mother liquor
Vacuum distillation.Crystallisation by cooling, filtering are carried out to the evaporated mother liquor after concentration, obtain distilled water, sodium bicarbonate crude product and filtering
Mother liquor, distilled water return step (2) is middle to be leached, roasting in bicarbonate hydrogen sodium crude product return step (1), under filtrated stock enters
Secondary distillation and concentration.
The V that the present embodiment obtains2O5Product purity is 99.0%, and the V leaching rate of the present embodiment is 95.1%, the present embodiment
Precipitation rate be 98.8%, vanadium overall recovery be 94.0%.
Embodiment 4
Vanadium-containing material used in the present embodiment is the converter slag of essence containing vanadium of vanadium titano-magnetite steel-making, and vanadium grade is
29.5%, the sodium salt is the mixture of sodium carbonate and sodium bicarbonate.
The sodium roasting vanadium-extracting technique of the present embodiment includes:
(1) sodium roasting: according to the mass percent of vanadium-containing material, 30% sodium salt is mixed with vanadium-containing material, 900
It is roasted under the conditions of DEG C, obtains roasting clinker；
(2) it leaches: roasting clinker being mixed with water according to mass ratio for 1:4, mill leaching 5h, solid-liquid point under the conditions of about 50 DEG C
From obtaining leachate and leached mud；
(3) precipitation: the molar ratio according to vanadium complete in nitrogen complete in ammonium carbonate and leachate is 8:1, and ammonium carbonate is added and is leached
In liquid, it is passed through CO2Keeping solution ph is 10, stirs 1h under the conditions of 70 DEG C, is separated by solid-liquid separation, and obtains ammonium metavanadate and precipitation is female
Liquid；
(4) it calcines: the ammonium metavanadate being calcined under the conditions of 600 DEG C, obtains V2O5Product；
(5) it recycles sodium salt: deposition vanadium mother liquid is subjected to deamination distillation, control evaporation capacity is the 5% of deposition vanadium mother liquid total volume, is obtained
To weak aqua ammonia and evaporated mother liquor, weak aqua ammonia returns to precipitation in next step (3)；Evaporated mother liquor is further subtracted under the conditions of 83 DEG C
Pressure distillation.Crystallisation by cooling, filtering are carried out to the evaporated mother liquor after concentration, it is female to obtain distilled water, sodium bicarbonate crude product and filtering
Liquid, distilled water return step (2) is middle to be leached, and roasting, filtrated stock enter next time in bicarbonate hydrogen sodium crude product return step (1)
Distillation and concentration.
The V that the present embodiment obtains2O5Product purity is 98.8%, and the V leaching rate of the present embodiment is 96.9%, the present embodiment
Precipitation rate be 99.3%, vanadium overall recovery be 96.2%.
In conclusion wherein precipitation walks the embodiment of the present invention includes sodium roasting, leaching, precipitation, recycling sodium salt
Suddenly ammonium carbonate precipitation is used, deposition vanadium mother liquid ingredient based on sodium bicarbonate, return by the sodium bicarbonate crude product obtained after being completely distilled off
Sodium operation is returned, sodium is recycled, and it avoids traditional handicraft and uses ammonium sulfate and ammonium chloride precipitation bring environmental issue,
Solve sodium sulphate or sodium chloride slag muck product, unavailable problem in production.Its simple process reduces production cost, ring
Protect remarkable benefit.Further, to deposition vanadium mother liquid carry out distillation procedure include deamination distillation and redistillation, what deamination distilled
Weak aqua ammonia can return to precipitation step and continue precipitation, therefore excess of ammonia is recycled when precipitation；The redistillation of deposition vanadium mother liquid
Obtained distilled water, which returns, leaches operation, and water obtains circulation and uses, and realizes sodium roasting vanadium-extracting wastewater zero discharge.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of sodium roasting vanadium-extracting technique, which is characterized in that the technique includes:
Sodium roasting: vanadium-containing material being mixed with sodium salt, is roasted, to obtain roasting clinker；
It leaches: water logging being carried out to the roasting clinker, to obtain leached mud and containing the leachate of vanadium；
Precipitation: ammonium carbonate is mixed in the environment of pH value is 8~10 with the leachate, then is separated by solid-liquid separation, to obtain inclined vanadium
Sour ammonium and deposition vanadium mother liquid, the ammonium metavanadate are used to prepare vanadic anhydride；
It recycles sodium salt: distillation procedure being carried out to the deposition vanadium mother liquid, using crystallisation by cooling, sodium bicarbonate is obtained by filtration slightly produces
Product, the sodium bicarbonate crude product are back to the sodium roasting step as raw material.
2. sodium roasting vanadium-extracting technique according to claim 1, which is characterized in that carry out distillation behaviour to the deposition vanadium mother liquid
As the step of include:
Deamination distillation is carried out to the deposition vanadium mother liquid, to obtain weak aqua ammonia and evaporated mother liquor；
Redistillation is carried out under the conditions of 70~100 DEG C to the evaporated mother liquor.
3. sodium roasting vanadium-extracting technique according to claim 2, which is characterized in that the weak aqua ammonia that the deamination distills
The precipitation step is back to as raw material.
4. sodium roasting vanadium-extracting technique according to claim 2, which is characterized in that the evaporation capacity control of the deamination distillation
It is the 5~20% of the deposition vanadium mother liquid total volume.
5. sodium roasting vanadium-extracting technique according to claim 2, which is characterized in that the redistillation is vacuum distillation.
6. sodium roasting vanadium-extracting technique according to claim 1, which is characterized in that described in the sodium roasting step
Sodium salt is at least one of sodium carbonate, sodium bicarbonate.
7. sodium roasting vanadium-extracting technique according to claim 2, which is characterized in that in the recycling sodium salt step, through institute
State and the sodium bicarbonate crude product and filtrated stock be obtained by filtration, the filtrated stock be used for in the distillation procedure next time
Evaporated mother liquor mixing after carry out the redistillation.
8. sodium roasting vanadium-extracting technique according to claim 1, which is characterized in that in the precipitation step, the carbonic acid
The molar ratio of the full vanadium in full nitrogen and the leachate in ammonium is (3~8): 1.
9. sodium roasting vanadium-extracting technique according to claim 1, which is characterized in that in the precipitation step, the carbonic acid
After ammonium is mixed with the leachate, it is passed through CO2It keeps solution ph to be stirred simultaneously for 8~10, then carries out the solid-liquid point
From.
10. sodium roasting vanadium-extracting technique according to claim 1, which is characterized in that the vanadium-containing material is v-ti magnetite
One of mine, bone coal navajoite, steel-making vanadium slag, vanadium grade is 5~30%.
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Cited By (6)
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| CN110358935A (en) * | 2019-08-15 | 2019-10-22 | 攀钢集团钒钛资源股份有限公司 | The method of vanadium and sodium is recycled from sodium vanadate solution |
| CN110735032A (en) * | 2019-09-03 | 2020-01-31 | 昆明禾丰环境研究所 | vanadium-titanium-iron paragenetic ore treatment process |
| CN114182112A (en) * | 2021-11-02 | 2022-03-15 | 攀钢集团研究院有限公司 | Method for extracting vanadium from vanadium slag through carbonation leaching and recycling medium |
| CN114644357A (en) * | 2022-03-11 | 2022-06-21 | 万循材料科技有限公司 | Method for preparing ammonium metavanadate by sodium modification vanadium extraction combined alkali preparation and low-cost vanadium slag utilization |
| CN115321737A (en) * | 2022-08-29 | 2022-11-11 | 新疆盛安新材料科技有限公司 | Method for treating sodium-containing wastewater in vanadium slag sodium modification vanadium extraction process |
| CN115557558A (en) * | 2022-09-27 | 2023-01-03 | 上海晶宇环境工程股份有限公司 | Vanadium precipitation wastewater treatment method and system |
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