CN114134344B - Method for precipitating vanadium by using ammonium metavanadate - Google Patents
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Abstract
The application relates to the technical field of chemical industry, and discloses a method for precipitating vanadium by using ammonium metavanadate. The method comprises the following steps: (1) Adjusting the pH value of the vanadium precipitation solution to 1.8-5.0, adding ammonium metavanadate for pulping, and adjusting the pH value of the pulping liquid to 1.5-2.0, wherein the adding amount of the ammonium metavanadate is NH in the ammonium metavanadate 4 VO 3 The mass ratio of the vanadium-precipitating liquid to the V in the vanadium-precipitating liquid is 1-5: 1 is the right; (2) After the pH of the slurry is stable, the temperature of the slurry is raised to 90-100 ℃ at a heating rate of 3-10 ℃/min for precipitation, and then ammonium polyvanadate is obtained; (3) And (3) washing, drying and calcining the ammonium polyvanadate after filtering to obtain vanadium pentoxide. The method is simple to operate, the ammonium metavanadate is taken as the vanadium ammonium salt to obviously reduce the ammonium salt consumption, the ammonia nitrogen utilization rate is high, the influence of excessive impurities in the vanadium liquid on the quality of vanadium precipitation can be avoided, the vanadium loss is small, and the ammonia nitrogen content in the wastewater is low.
Description
Technical Field
The application relates to the technical field of chemical industry, in particular to a method for precipitating vanadium by using ammonium metavanadate.
Background
The vanadium precipitation process in the current industrial vanadium extraction process mainly comprises a chemical precipitation method, including hydrolysis vanadium precipitation, ammonium salt vanadium precipitation, ferric salt vanadium precipitation and calcium salt vanadium precipitation. The method has the advantages of simple operation of hydrolyzing and precipitating vanadium, short production period, low production cost and wide fluctuation of vanadium concentration, and has the defects that the red cake obtained by hydrolyzing and precipitating vanadium is crude vanadium, the product purity is low, the acid consumption is large, the sewage amount is large, and the red cake is basically replaced by ammonium salt vanadium precipitation; the precipitation amount of the vanadium precipitated by the calcium salt is large, and the subsequent working difficulty is large; the calcium salt vanadium precipitation has high requirement on the purity of the vanadium-containing solution, and the Si and P contents are as low as possible; the calcium salt vanadium precipitation is generally used as an intermediate product for enriching vanadium or used as a raw material of ferrovanadium in smelting, and the application is limited. The precipitation amount of the vanadium precipitated by the calcium salt is large, and the subsequent working difficulty is large; the calcium salt vanadium precipitation has high requirement on the purity of the vanadium-containing solution, and the Si and P contents are as low as possible; the calcium salt vanadium precipitation is generally used as an intermediate product for enriching vanadium or used as a raw material of ferrovanadium in smelting, and the application is limited. The ferric salt vanadium slag amount is larger, and the product purity is lower. Therefore, the prior process mainly adopts an ammonium salt vanadium precipitation process.
The ammonium salt vanadium precipitation process has high ammonium consumption, and the wastewater has higher ammonia content and difficult treatment.
Chinese patent CN112047379A, "method for precipitating ammonium polyvanadate", provides a method for precipitating ammonium polyvanadate. Firstly, preheating a vanadium-containing solution to 60-80 ℃, adding ammonium salt, stirring and dissolving to obtain a mixed solution; adding the mixed solution into a certain amount of acid, and changing the feeding mode to adopt a method of adding a mixture of vanadium liquid and ammonium salt into a predetermined acid amount to realize rapid precipitation, wherein the vanadium precipitation rate can reach more than 99% after 15min of precipitation; the ammonium-vanadium ratio can be reduced to 0.4-0.8, and the ammonium salt dosage can be reduced. The method has the advantages of low equipment requirement, convenient operation, wide application range, low cost and good social and economic benefits.
Chinese patent CN111020233B, "method for preparing vanadium pentoxide by ammonium-free vanadium precipitation", comprises the following steps: reducing the vanadium-containing pickle liquor by using a reducing agent, and regulating the pH value of the solution by using ammonia water; extracting by adopting a cation extractant to obtain an organic phase loaded with vanadyl cations and raffinate; hydrogen peroxide and sulfuric acid are used as materials to maintain the pH value to be 1.5-2.5; and (3) carrying out heat preservation and stirring reaction for 15-45 min at the temperature of 90-100 ℃, filtering and washing to obtain ammonium polyvanadate. The back extraction agent is used for back extraction to obtain vanadium back extraction liquid; and (3) standing the strip liquor for a period of time, enabling the peroxypolyvanadate to be unstable, decomposing to generate polyvanadate, gradually separating out the polyvanadate from the water phase, and calcining to obtain a vanadium pentoxide product. The method for preparing vanadium pentoxide by ammonium-free vanadium precipitation provided by the application greatly simplifies the vanadium smelting process, thoroughly solves the problems of large consumption of sulfuric acid and ammonia water and large output of ammonia nitrogen wastewater in the back extraction process, has the technical characteristics of short process, greenness and high efficiency, and is easy for industrial popularization.
In view of the above-mentioned patent, the method for precipitating vanadium by reducing the ammonium salt dosage and precipitating vanadium without ammonium is relatively high in cost and complex in operation.
Disclosure of Invention
The application aims to solve the problems of high ammonium consumption in the ammonium salt vanadium precipitation process, high ammonia content in wastewater, difficult treatment, high cost and complex operation of precipitating vanadium by adopting a mode of reducing the ammonium salt consumption for precipitating vanadium and no ammonium for precipitating vanadium in the prior art, and provides a method for precipitating vanadium by using ammonium metavanadate.
In order to achieve the above object, the present application provides a method for precipitating vanadium using ammonium metavanadate, comprising the steps of:
(1) Adjusting the pH value of the vanadium precipitation solution to 1.8-5.0, adding ammonium metavanadate for pulping, and adjusting the pH value of the pulping liquid to 1.5-2.0, wherein the adding amount of the ammonium metavanadate is NH in the ammonium metavanadate 4 VO 3 The mass ratio of the vanadium-precipitating liquid to the V in the vanadium-precipitating liquid is 1-5: 1 is the right;
(2) After the pH of the slurry is stable, the temperature of the slurry is raised to 90-100 ℃ at a heating rate of 3-10 ℃/min for precipitation, and then ammonium polyvanadate is obtained;
(3) And (3) washing, drying and calcining the ammonium polyvanadate after filtering to obtain vanadium pentoxide.
Preferably, in the step (1), the vanadium precipitation solution is a calcium-method acid leaching vanadium solution or a sodium-method water leaching vanadium solution.
Preferably, in the step (1), when the vanadium precipitation liquid is the calcium acid leaching vanadium liquid, the pH value of the vanadium precipitation liquid is regulated to 2.0-3.0; when the vanadium precipitation liquid is sodium method water leaching vanadium liquid, the pH value of the vanadium precipitation liquid is regulated to 1.8-5.0.
Preferably, in the step (1), the pH value of the vanadium precipitation solution is adjusted by using 1:1 sulfuric acid.
Preferably, in step (1), the pH of the slurry is adjusted with a sulfuric acid solution.
More preferably, in step (1), 1:1 sulfuric acid solution to adjust the pH value of the slurry.
Preferably, in step (1), the beating temperature is 20 to 60 ℃.
Preferably, in the step (2), the incubation time is 30 to 60 minutes.
Preferably, in step (3), the ammonium polyvanadate is washed with water, and the temperature of the washing water used is 50 to 80 ℃.
Preferably, in step (3), the drying temperature is 75 to 110 ℃; the drying time is greater than 4 hours.
Preferably, in the step (3), the calcination temperature is 500 to 550 ℃, and the calcination time is 150 to 240 minutes.
Compared with the prior art, the application has the following advantages:
1) The ammonium metavanadate is used as ammonium salt, so that the vanadium concentration in the vanadium precipitation liquid can be increased, the impurity content in the vanadium precipitation liquid can be diluted, the V/P value can be improved, the Na/V value can be reduced, and the influence of the excessive impurity content in the vanadium precipitation liquid on the quality of the vanadium precipitation can be effectively avoided;
2) The ammonium metavanadate is taken as the vanadium-precipitating ammonium salt, so that the ammonium salt dosage can be obviously reduced, and the ammonium metavanadate coefficient (mass ratio) is only NH 4 VO 3 V=1-5, high ammonia nitrogen utilization rate, less ammonia nitrogen in the wastewater and low cost.
Detailed Description
The following describes specific embodiments of the present application in detail. It should be understood that the detailed description and specific examples, while indicating and illustrating the application, are not intended to limit the application.
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
The method for precipitating vanadium by utilizing ammonium metavanadate provided by the application comprises the following steps of:
(1) Adjusting the pH value of the vanadium precipitation solution to 1.8-5.0, adding ammonium metavanadate for pulping, and adjusting the pH value of the pulping liquid to 1.5-2.0, wherein the adding amount of the ammonium metavanadate is ammonium metavanadateMiddle NH 4 VO 3 The mass ratio of the vanadium-precipitating liquid to the V in the vanadium-precipitating liquid is 1-5: 1 is the right;
(2) After the pH of the slurry is stable, the temperature of the slurry is raised to 90-100 ℃ at a heating rate of 3-10 ℃/min for precipitation, and then ammonium polyvanadate is obtained;
(3) And (3) washing, drying and calcining the ammonium polyvanadate after filtering to obtain vanadium pentoxide.
In the method of the application, in the step (1), the vanadium precipitation liquid is a calcium acid leaching vanadium liquid or a sodium water leaching vanadium liquid.
According to the application, ammonium metavanadate replaces traditional ammonium salts such as ammonium sulfate, ammonium chloride, ammonium carbonate and ammonium bicarbonate to be used as vanadium-precipitating ammonium salts, the vanadium-precipitating liquid is firstly adjusted to a specific pH value, then ammonium metavanadate is added for pulping, the ammonium salt loss in the process of adjusting the pH value again after the ammonium metavanadate is added can be avoided, ammonium polyvanadate is precipitated at high temperature after the pH value is continuously adjusted to the optimal state of vanadium precipitation, and then the ammonium polyvanadate is filtered, washed and dried, and calcined to obtain vanadium pentoxide.
The existing method mainly adopts ammonium sulfate, ammonium chloride, ammonium carbonate, ammonium bicarbonate and the like as ammonium salts to precipitate vanadium, and the ammonium salts are combined with vanadate in the solution to generate ammonium polyvanadate at high temperature, and the ammonium addition coefficient of the method is 1.8-6.0 times of the mass of vanadium in the vanadium precipitation solution. The application adopts ammonium metavanadate as vanadium-precipitating ammonium salt, the ammonium metavanadate is dissolved in the vanadium-precipitating liquid under the condition of the application after being added into the vanadium-precipitating liquid, the vanadium content in the vanadium-precipitating liquid is increased, simultaneously, the ammonium reacts with vanadium in the vanadium-precipitating liquid again to generate ammonium polyvanadate, namely, the ammonium metavanadate is cracked under the condition of acidity regulation, part of the ammonium metavanadate directly generates ammonium polyvanadate, the rest ammonium ions are combined with vanadate in the vanadium-precipitating liquid to generate ammonium polyvanadate, and the mass coefficient of the ammonium metavanadate is only NH 4 VO 3 /V＝1～5。
The method for precipitating vanadium can obviously reduce the ammonium-vanadium ratio in the vanadium precipitation process. For example: when the mass of vanadium in the vanadium precipitation solution is 51g (namely, the vanadium is 1 mol), ammonium sulfate is adopted as ammonium salt (the ammonium addition coefficient is 1.8-2), and when the ammonium addition coefficient is 1.8, the molar quantity of ammonium is as follows: (51×1.8/132) ×2=1.40; when the ammonium addition coefficient is 2, the molar amount of ammonium is: (51×2/132) ×2=1.54, i.e. the ammonium vanadium molar ratio is 1.4-1.54:1 when ammonium sulfate is used for precipitating vanadium. Similarly, when ammonium metavanadate is used as the vanadium precipitation ammonium salt (the ammonium addition coefficient is 1-5), when the ammonium addition coefficient is 1, the molar amount of ammonium is as follows: 51×1+.117=0.44, ammonium vanadium molar ratio: 0.44, (1+0.44) =0.44:1.44=0.3:1; when the ammonium addition coefficient is 5, the molar amount of ammonium is: 51×5+.117=2.18, ammonium vanadium molar ratio is 2.18: (1+2.18) =0.685:1, namely when ammonium metavanadate is adopted for vanadium precipitation, the ammonium vanadium molar ratio is 0.3-0.685:1. Therefore, the method for precipitating vanadium has the advantages that the ammonium vanadium molar ratio is obviously reduced, namely, compared with the prior art, the ammonium consumption is obviously reduced, and the ammonia nitrogen utilization rate is obviously improved. Meanwhile, the calcium acid leaching vanadium liquid contains P, mn and other impurities, the sodium acid leaching vanadium liquid contains Si, na, cr and other impurities, ammonium metavanadate is used as ammonium salt, the vanadium concentration in the vanadium precipitation liquid is increased, the impurity content in the vanadium precipitation liquid is diluted, and the influence of the excessive impurity content in the vanadium precipitation liquid on the quality of vanadium precipitation can be effectively avoided.
In a specific embodiment, in the step (1), when the vanadium precipitation solution is a calcium acid leaching vanadium solution, the pH of the vanadium precipitation solution may be adjusted to 2.0 to 3.0, for example, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9 or 3.0. When the vanadium precipitation liquid is sodium method water leaching vanadium liquid, the pH value of the vanadium precipitation liquid is adjusted to 1.8-5.0, such as 1.8, 2.0, 2.2, 2.4, 2.6, 2.8, 3.0, 3.2, 3.4, 3.6, 3.8, 4.0, 4.2, 4.4, 4.6, 4.8 or 5.0.
In a specific embodiment, in step (1), 1 may be used: and 1, regulating the pH value of the vanadium precipitation solution by sulfuric acid. Herein, the 1: the 1 sulfuric acid is sulfuric acid obtained by mixing water and sulfuric acid according to a volume ratio of 1:1.
In the method of the present application, in step (1), the pH of the slurry is adjusted with a sulfuric acid solution. Specifically, 1:1 sulfuric acid solution to adjust the pH value of the slurry.
In a specific embodiment, the pH value of the slurry can be adjusted to 1.5-2.0, such as 1.5, 1.6, 1.7, 1.8, 1.9 or 2.0, and the pH value is a pH value in a vanadium precipitation state, so that the quality of vanadium precipitation is prevented from being influenced.
In the method of the present application, in the step (1), the beating temperature may be 20 to 60 ℃, specifically, for example, 20 ℃, 25 ℃, 30 ℃, 35 ℃, 40 ℃, 45 ℃, 50 ℃, 55 ℃, or 60 ℃. Pulping is carried out within the temperature range of 20-60 ℃, so that impurities mixed in Ammonium Polyvanadate (APV) can be washed away, and meanwhile, the loss caused by dissolving the ammonium polyvanadate in a solution can be avoided.
In particular embodiments, in step (2), the heating rate may be 3 ℃/min, 4 ℃/min, 5 ℃/min, 6 ℃/min, 7 ℃/min, 8 ℃/min, 9 ℃/min or 10 ℃/min.
In a specific embodiment, the slurry may be precipitated by heating to 90℃at 91℃at 92℃at 93℃at 94℃at 95℃at 96℃at 97℃at 98℃at 99℃or at 100 ℃.
In a preferred embodiment, in step (2), the incubation time is 30 to 60min, for example 30min, 35min, 40min, 45min, 50min, 55min or 60min.
In the method of the present application, in step (3), ammonium polyvanadate is washed with water, and the temperature of the washing water used is 50 to 80 ℃, specifically, the temperature of the washing water may be, for example, 50 ℃, 55 ℃, 60 ℃, 65 ℃, 70 ℃, 75 ℃ or 80 ℃. In the present application, washing with washing water at a temperature of 50 to 80 ℃ enables washing away part of impurities in ammonium polyvanadate.
In particular embodiments, in step (3), the drying temperature may be 75 to 110 ℃, such as 75 ℃, 80 ℃, 85 ℃, 90 ℃, 95 ℃, 100 ℃, 105 ℃, or 110 ℃.
In a specific embodiment, in step (3), the drying time is greater than 4h, and may be, for example, 5h, 6h, 7h, 8h, 9h, 10h, 11h, or 12h.
In the method of the present application, in step (3), the calcination temperature may be 500 to 550 ℃, for example 500 ℃, 505 ℃, 510 ℃, 515 ℃, 520 ℃, 525 ℃, 530 ℃, 535 ℃, 540 ℃, 545 ℃, or 550 ℃; the calcination time may be 150 to 240 minutes, for example 150, 160, 170, 180, 190, 200, 210, 220, 230 or 240 minutes.
The method can effectively reduce the influence of the excessive impurity content in the vanadium precipitation liquid on the quality of the vanadium precipitation, and the obtained vanadium pentoxide meets the quality standard requirements of YB/T5304-2017.
The present application will be described in detail by way of examples, but the scope of the present application is not limited thereto.
Example 1
Measuring 100ml of calcium acid leaching vanadium liquid in a beaker, starting an electric stirrer to stir, setting the rotating speed to 260r/min, regulating the pH value of the solution to 2.8 by using 1:1 sulfuric acid, and adding ammonium metavanadate with the ammonium metavanadate coefficient (mass ratio) of NH (NH) 4 VO 3 V=1 ammonium metavanadate solid was added for beating at 20 ℃, followed by 1:1, the pH value of the sizing liquid is regulated to 2.0. After the pH value is stable, heating to 95 ℃ according to the heating rate of 10 ℃/min, carrying out heat preservation reaction for 30min at 95 ℃, closing an electric stirrer after the heat preservation time is up, filtering in time, washing ammonium polyvanadate once by adopting tap water at 50 ℃, drying the ammonium polyvanadate at 110 ℃, calcining for 240min at 500 ℃ after the drying time is more than 4h, and thus obtaining the vanadium pentoxide.
The vanadium precipitation rate of example 1 was 99%; the element content of the vanadium pentoxide comprises 0.012 percent of P, 0.012 percent of S, 0.10 percent of Fe, 0.032 percent of Si and K 2 O content 0.02%, na 2 O content is 0.021%, V content is 55.6%, and the obtained vanadium pentoxide meets the quality standard requirement of YB/T5304-2017.
Example 2
Measuring 100ml of sodium method water immersion vanadium liquid in a beaker, starting an electric stirrer to stir, setting the rotating speed to 260r/min, adjusting the pH value of the solution to 5.0 by using 1:1 sulfuric acid, and adding ammonium metavanadate with the ammonium metavanadate coefficient (mass ratio) of NH (NH) 4 VO 3 V=2 ammonium metavanadate solid was added for beating at 60 ℃, followed by 1:1, the pH value of the sizing liquid is regulated to 2.0. Heating to 90 ℃ at a heating rate of 3 ℃/min after the pH value is stable, carrying out heat preservation reaction for 60min at 90 ℃, closing an electric stirrer after the heat preservation time is up, filtering in time, washing ammonium polyvanadate once by tap water at 80 ℃, drying the ammonium polyvanadate at 75 ℃, calcining for 150min at 550 ℃ after the drying time is more than 4h, and obtaining the di-pentoxideVanadium.
The vanadium precipitation rate of example 2 is 99.2%; the element content of the vanadium pentoxide comprises 0.01 percent of P, 0.012 percent of S, 0.01 percent of Fe, 0.01 percent of Si and K 2 O content 0.02%, na 2 O content is 0.025%, V content is 55.6%, and the obtained vanadium pentoxide meets the quality standard requirements of YB/T5304-2017.
Example 3
Measuring 100ml of calcium acid leaching vanadium liquid in a beaker, starting an electric stirrer to stir, setting the rotating speed to 260r/min, regulating the pH value of the solution to 2.8 by using 1:1 sulfuric acid, and adding ammonium metavanadate with the ammonium metavanadate coefficient (mass ratio) of NH (NH) 4 VO 3 V=5 ammonium metavanadate solid was added and beaten at 40 ℃, followed by 1:1, the pH value of the sizing liquid is regulated to be 1.5. After the pH value is stable, heating to 90 ℃ at a heating rate of 10 ℃/min, carrying out heat preservation reaction for 60min at 90 ℃, closing an electric stirrer after the heat preservation time is up, filtering in time, washing ammonium polyvanadate once by tap water at 80 ℃, drying the ammonium polyvanadate at 110 ℃, calcining for more than 4h at 550 ℃ for 240min, and thus obtaining vanadium pentoxide.
The vanadium precipitation rate of example 3 was 99.15%; the element content composition of the vanadium pentoxide is that the P content is 0.011%, the S content is 0.012%, the Fe content is 0.098%, the Si content is 0.032%, and the K content is 0.012% 2 O content 0.02%, na 2 O content is 0.021%, V content is 55.56%, and the obtained vanadium pentoxide meets the quality standard requirement of YB/T5304-2017.
Comparative example 1
The procedure of example 1 was followed, except that 1:1 to adjust the pH of the slurry to 3.0.
The vanadium precipitation rate of comparative example 1 is 98.9%; the element content composition of the vanadium pentoxide is that P content is 0.128%, S content is 0.10%, fe content is 0.20%, si content is 0.35%, K 2 O content 0.02%, na 2 O content is 0.021%, V content is 53.68%, and the obtained vanadium pentoxide does not meet the quality standard requirements of YB/T5304-2017.
Comparative example 2
The procedure of example 1 was followed, except that the pH was stabilized, and the temperature was increased to 80℃at a rate of 10℃per minute, and the reaction was continued at 80℃for 30 minutes.
The vanadium precipitation rate of comparative example 2 is 90%; the element content composition of the vanadium pentoxide is that the P content is 0.218 percent, the S content is 0.20 percent, the Fe content is 0.089 percent, the Si content is 0.37 percent and the K content is 0.089 percent 2 O content 0.102%, na 2 O content is 0.051, V content is 53.4%, and the obtained vanadium pentoxide does not meet the quality standard requirements of YB/T5304-2017.
The preferred embodiments of the present application have been described in detail above, but the present application is not limited thereto. Within the scope of the technical idea of the application, a number of simple variants of the technical solution of the application are possible, including combinations of the individual technical features in any other suitable way, which simple variants and combinations should likewise be regarded as being disclosed by the application, all falling within the scope of protection of the application.
Claims (7)
1. A method for precipitating vanadium by using ammonium metavanadate is characterized by comprising the following steps:
(1) Adjusting the pH value of the vanadium precipitation solution to 1.8-5.0 by adopting a sulfuric acid solution with the ratio of 1:1, adding ammonium metavanadate, pulping, and adjusting the pH value of the pulping liquid to 1.5-2.0 by adopting a sulfuric acid solution with the ratio of 1:1, wherein the adding amount of ammonium metavanadate is NH in ammonium metavanadate 4 VO 3 The mass ratio of the vanadium-precipitating liquid to the V in the vanadium-precipitating liquid is 1-5: 1 is the right;
(2) After the pH of the slurry is stable, the temperature of the slurry is raised to 90-100 ℃ at a heating rate of 3-10 ℃/min for precipitation, and then ammonium polyvanadate is obtained;
(3) Washing, drying and calcining ammonium polyvanadate after filtering to obtain vanadium pentoxide;
in the step (1), the vanadium precipitation liquid is a calcium acid leaching vanadium liquid or a sodium water leaching vanadium liquid.
2. The method according to claim 1, wherein in the step (1), when the vanadium precipitation liquid is a calcium acid leaching vanadium liquid, the pH value of the vanadium precipitation liquid is adjusted to 2.0 to 3.0; when the vanadium precipitation liquid is sodium method water leaching vanadium liquid, the pH value of the vanadium precipitation liquid is regulated to 1.8-5.0.
3. The method according to claim 1, wherein in step (1), the beating temperature is 20 to 60 ℃.
4. The method according to claim 1, wherein in the step (2), the incubation time is 30 to 60 minutes.
5. The method according to claim 1, wherein in step (3), ammonium polyvanadate is washed with water, and the temperature of the washing water used is 50 to 80 ℃.
6. The method according to claim 1, wherein in step (3), the drying temperature is 75 to 110 ℃; the drying time is greater than 4 hours.
7. The method according to claim 1, wherein in the step (3), the calcination temperature is 500 to 550 ℃ and the calcination time is 150 to 240min.
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| CN104404274A (en) * | 2014-12-08 | 2015-03-11 | 中南大学 | Method for precipitating, separating and recovering vanadium from vanadium-containing solution |
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| CN112047379A (en) * | 2020-09-14 | 2020-12-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for precipitating ammonium polyvanadate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101748297A (en) * | 2009-12-30 | 2010-06-23 | 攀钢集团攀枝花钢钒有限公司 | Method for preparing ammonium metavanadate from vanadium extraction leaching solution |
| CN104404274A (en) * | 2014-12-08 | 2015-03-11 | 中南大学 | Method for precipitating, separating and recovering vanadium from vanadium-containing solution |
| CN110438347A (en) * | 2019-09-11 | 2019-11-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Sodium cleans extraction vanadium method |
| CN112047379A (en) * | 2020-09-14 | 2020-12-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for precipitating ammonium polyvanadate |
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