CN113151684A - Method for precipitating vanadium from sodium roasting water leaching purification solution by hydrochloric acid - Google Patents

Method for precipitating vanadium from sodium roasting water leaching purification solution by hydrochloric acid Download PDF

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CN113151684A
CN113151684A CN202110425663.8A CN202110425663A CN113151684A CN 113151684 A CN113151684 A CN 113151684A CN 202110425663 A CN202110425663 A CN 202110425663A CN 113151684 A CN113151684 A CN 113151684A
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vanadium
solution
hydrochloric acid
precipitating
water leaching
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舒贵鹏
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Panzhihua Yangrun Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00Working 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
    • C22B7/006Wet processes
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G31/00Compounds of vanadium
    • C01G31/02Oxides
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/44Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B34/00Obtaining refractory metals
    • C22B34/20Obtaining niobium, tantalum or vanadium
    • C22B34/22Obtaining vanadium
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The invention discloses a method for precipitating vanadium from a sodium roasting water immersion purification solution by hydrochloric acid, belonging to the field of hydrometallurgy. The method for precipitating vanadium by using hydrochloric acid is characterized by adding hydrochloric acid into the purified liquor, regulating pH value of said solution, heating and continuously stirring to separate out precipitate, washing said precipitate, heating and melting so as to obtain the vanadium pentoxide product with vanadium pentoxide contents of 98.0%, 99.0% and 99.5%. The method has the advantages of simple process, less working procedures and high production efficiency. Under the same condition, the hydrochloric acid has higher vanadium precipitation rate than sulfuric acid, the obtained vanadium pentoxide is purer, and the problems of lower purity and vanadium precipitation rate of the vanadium product obtained by the existing sulfuric acid hydrolysis vanadium precipitation method are effectively solved.

Description

Method for precipitating vanadium from sodium roasting water leaching purification solution by hydrochloric acid
Technical Field
The invention belongs to the field of hydrometallurgy, and particularly relates to a method for precipitating vanadium from a sodium roasting water leaching purification solution by hydrochloric acid.
Background
At present, the vanadium precipitation method for sodium salt roasting water leaching purification solution mainly comprises the method of hydrolyzing ammonium salt and sulfuric acid to precipitate vanadium, and because the high ammonium concentration wastewater and ammonia waste gas generated by vanadium precipitation by ammonium salt pollute the environment and the treatment cost is high, the research on hydrolyzing vanadium precipitation is turned to.
At present, in the prior art for researching the vanadium precipitation by sulfuric acid hydrolysis, the problems of complex process, multiple working procedures, low production efficiency, poor practicability, and the need of technically modifying equipment, facilities and the like for precipitating vanadium from the original ammonium salt exist, such as: patent CN102897834A published in 1 month of 2013, relating to a method for precipitating vanadium and a method for preparing vanadium pentoxide; patent CN105256137A published in 6.2018 is a method for hydrolyzing and precipitating vanadium-containing solution.
And the literature, "vanadium-chromium solution hydrolysis vanadium precipitation test research" (Wuzhexiu, Jianglin vanadium-chromium solution hydrolysis vanadium precipitation test research [ J)]Vanadium-titanium iron 2020,41(05): 22-26) and literature "high-efficiency low-consumption green vanadium precipitation technology experimental research" (Lecidaceae, Tang Xian, high-efficiency low-consumption green vanadium precipitation technology experimental research [ J]Ferroalloy 2014,45(06):25-29.) shows that when the sulfuric acid hydrolysis vanadium precipitation method is adopted, vanadium precipitation is carried out at high sodium concentration (> 50g/L), and sodium vanadate is generated more, so that V is caused if sodium removal is incomplete2O5The purity is lower; at the same time because part of vanadium generates [ VO2SO4]-And the vanadium deposition rate is influenced by factors.
In addition, in some methods, in order to remove sodium, the production cost is increased by adding sodium removal procedures, equipment and materials thereof, and meanwhile, vanadium loss is increased once in the sodium removal solution, so that the vanadium yield is reduced, namely the vanadium precipitation rate is reduced, such as: patent CN104694761A published in 6.2015, which is a method for extracting vanadium from vanadium liquid in a vanadium slag sodium salt roasting vanadium extraction process; patent CN111592042A published in 8.2020, which is a method for preparing high-purity vanadium pentoxide by vanadium liquid without ammonium precipitation; patent CN112030011A in 12.2020 discloses a method for producing vanadium pentoxide by one-step vanadium precipitation of vanadium-containing material by a full-wet method.
Therefore, compared with the prior art, the research on the vanadium precipitation rate is higher, and V is higher2O5The impurity content is lower, and a vanadium precipitation method with simple process steps is necessary.
Disclosure of Invention
The invention aims to solve the technical problem that the purity and vanadium precipitation rate of the vanadium product obtained by the existing sulfuric acid hydrolysis vanadium precipitation method are low.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for precipitating vanadium by using hydrochloric acid for the sodium salt roasting water leaching purification solution comprises the following steps:
a. under the stirring state, hydrochloric acid is used for adjusting the pH value of the purifying solution to 0.50-1.60, and the pH value is kept stable;
b. b, under the stirring state, putting the solution treated in the step a into a water bath kettle, heating the water bath kettle until the water is boiled, and keeping the boiling time to be more than or equal to 35 min;
c. b, filtering the liquid treated in the step b to obtain red vanadium precipitate, and washing the red vanadium precipitate by using an ammonium salt solution;
d. and c, heating the red vanadium washed in the step c to be molten, and cooling to obtain vanadium pentoxide.
In the step a, the purifying solution is obtained by leaching solution obtained by a sodium roasting water leaching process and removing impurities from calcium salt, aluminum salt or magnesium salt.
The concentration of vanadium in the purifying liquid is 10-70 g/L.
Further, the concentration of vanadium in the purifying liquid is 15-50 g/L.
In the step a, the concentration of the hydrochloric acid is 20-38%, and the hydrochloric acid can be diluted by 1-2 times when in use.
In the step a, the condition for keeping the pH value stable is that the pH value is changed to more than +/-0.05 within 10-30 s.
Further, the condition for keeping the pH value stable is that the pH value is not more than + -0.01 within 20 s.
In the steps a and b, the stirring speed is 300-400 r/min.
Further, in the above steps a and b, the stirring speed was 350 r/min.
And in the step b, timely supplementing the reduced evaporation amount of the vanadium precipitation solution with boiling water in the boiling process.
In the step c, the washing method comprises the following steps: according to the liquid-solid ratio of ammonium salt solution to precipitated red vanadium of 1.3-2.0mL to 1g, stirring to disperse red vanadium, filtering to dry, and repeating for 2-4 times.
Further, the above ammonium salt solution precipitated red vanadium 1.4-1.6 mL: 1 g.
In the step c, the concentration of the ammonium salt solution is 5-50g/L, and the ammonium salt is at least one of ammonium chloride, ammonium sulfate, ammonium nitrate and ammonium acetate.
Further, the ammonium salt is ammonium chloride, and the concentration of the ammonium salt solution is 7-12 g/L.
The invention has the beneficial effects that: the invention adopts hydrochloric acid as a vanadium precipitation agent, and adjusts the pH value of the purifying solution to carry out hydrolysis and vanadium precipitation. High-purity poly-vanadic acid is obtained by depositing vanadium with hydrochloric acidSalt, washing the precipitate with low ammonium salt solution, heating to melt to obtain V2O5Products with the contents of 98.0%, 99.0% and 99.5% are obtained.
On the basis of equipment and facilities for precipitating vanadium from orthogenic ammonium salt, the method does not need additional production equipment and facilities besides replacing sulfuric acid with hydrochloric acid, and has the advantages of simple process, less working procedures and high production efficiency. Under the same condition, the hydrochloric acid has higher vanadium precipitation rate than sulfuric acid, and the obtained V2O5The method uses 1/10 of ammonium salt precipitated vanadium, which can increase the recycling times of the washing filtrate and greatly reduce the environmental pollution and the wastewater treatment cost.
Detailed Description
The technical solution of the present invention can be specifically implemented as follows.
The method for precipitating vanadium by using hydrochloric acid for the sodium salt roasting water leaching purification solution comprises the following steps:
a. under the stirring state, hydrochloric acid is used for adjusting the pH value of the purifying solution to 0.50-1.60, and the pH value is kept stable;
b. b, under the stirring state, putting the solution treated in the step a into a water bath kettle, heating the water bath kettle until the water is boiled, and keeping the boiling time to be more than or equal to 35 min;
c. b, filtering the liquid treated in the step b to obtain red vanadium precipitate, and washing the red vanadium precipitate by using an ammonium salt solution;
d. and c, heating the red vanadium washed in the step c to be molten, and cooling to obtain vanadium pentoxide.
In the step a, the purifying solution is obtained by leaching solution obtained by a sodium roasting water leaching process and removing impurities from calcium salt, aluminum salt or magnesium salt. Among them, vanadium exists in pentavalent form, and usually contains impurities such as sodium, potassium, silicon, phosphorus, sulfur, calcium, magnesium, iron, aluminum, chromium, manganese, titanium, and the like.
In order to maximize the utilization of raw materials and achieve better experimental effects, it is preferable that the concentration of vanadium in the purified solution is 10-70 g/L. More preferably, the concentration of vanadium in the purified liquid is 15-50 g/L.
For better pH control, it is preferable that the hydrochloric acid concentration in the step a is 20-38%, and the hydrochloric acid can be diluted 1-2 times when used.
In order to reduce the influence of the solution pH value on the hydrolysis vanadium precipitation reaction, it is preferable that the pH value is kept stable in the step a under the condition that the pH value is not more than + -0.05 within 10-30 s. More preferably, the pH is maintained at a stable value within 20s under the condition that the pH value is not more than. + -. 0.01.
Since the hydrolysis precipitation of vanadium is a hydrolysis reaction process accompanied by heat and mass transfer, and the stirring speed is properly maintained, it is preferable that the stirring speed in the above steps a and b is 400 r/min. More preferably, the stirring speed is 350 r/min.
In order to reduce the change of the pH value and the temperature of the precipitated vanadium solution during the heating process, it is preferable that the evaporation reduction amount of the precipitated vanadium solution is timely supplemented with boiling water during the boiling process in the step b.
In order to remove impurities and achieve a product with higher purity, it is preferable that the washing method in the step c is: according to the liquid-solid ratio of ammonium salt solution to precipitated red vanadium of 1.3-2.0mL to 1g, stirring to disperse red vanadium, filtering to dry, and repeating for 2-4 times. More preferably, the ammonium salt solution precipitated red vanadium is 1.4-1.6 mL: 1 g.
In order to reduce the entry of impurities and achieve better impurity removal effect, it is preferable that in the step c, the concentration of the ammonium salt solution is 5 to 50g/L, and the ammonium salt is at least one of ammonium chloride, ammonium sulfate, ammonium nitrate and ammonium acetate. More preferably, the ammonium salt is ammonium chloride and the concentration of the ammonium salt solution is 7-12 g/L.
The technical solution and effects of the present invention will be further described below by way of practical examples.
Examples
Example 1: taking 300mL of each of 2 parts of purified solution (wherein V is 24.58g/L, Na is 60.1g/L), respectively adjusting the pH value to 1.20 and 1.40 by hydrochloric acid (1+1) under stirring, wherein the pH value is not more than +/-0.01 within 20s, putting the purified solution into a room-temperature water bath kettle, stirring the vanadium precipitation solution at the speed of 350r/min, heating to boiling for 50min (supplementing the vanadium precipitation solution with boiling water in time during boiling for evaporation), taking out the solution, carrying out solid-liquid suction filtration separation, washing the precipitated red vanadium by using 10g/L of ammonium chloride solution, and obtaining the ammonium salt solution (mL): precipitating red vanadium (g) at a liquid-solid ratio of 1.5: 1, stirring to disperse the red vanadium, filtering to dry, repeating the steps for 3 times, heating the red vanadium in a muffle furnace to melt, taking out, pouring out, and cooling to obtain flaky vanadium pentoxide.
Through the inspection: 1. the vanadium deposition rate of pH1.20 is 99.53%, and V in the vanadium pentoxide2O5=99.39%、Si=0.045%、Fe=0.01%、P=0.003%、S=0.006%。Na2O=0.51%、K2O=0.04%、Cr=0.052%。
2. The vanadium deposition rate of pH1.40 is 99.70%, and V in vanadium pentoxide is2O5=98.43%、Si=0.120%、Fe=0.03%、P=0.007%、S=0.009%。Na2O=0.97%、K2O=0.09%、Cr=0.082%。
Example 2: taking 300mL of each of 2 parts of purified solution (wherein V is 29.47g/L, Na is 73.3g/L), respectively adjusting the pH value to 0.90 and 1.10 by hydrochloric acid (1+1) under stirring, wherein the pH value is not more than +/-0.01 within 20s, putting the purified solution into a room-temperature water bath kettle, stirring the vanadium precipitation solution at the speed of 350r/min, heating to boil for 40min (supplementing the vanadium precipitation solution with boiling water in time during boiling for evaporation), taking out the solution, carrying out solid-liquid suction filtration separation, washing the precipitated red vanadium by using 10g/L of ammonium chloride solution, and obtaining the ammonium salt solution (mL): precipitating red vanadium (g) at a liquid-solid ratio of 1.5: 1, stirring to disperse the red vanadium, filtering to dry, repeating the steps for 3 times, heating the red vanadium in a muffle furnace to melt, taking out, pouring out, and cooling to obtain flaky vanadium pentoxide.
Through the inspection: 1. the vanadium deposition rate of pH0.90 is 98.84%, and V in the vanadium pentoxide2O5=99.55%、Na2O=0.34%、K2O=0.03%。
2. The vanadium deposition rate of pH1.10 is 99.63%, and V in the vanadium pentoxide is2O5=98.87%、Na2O=0.77%、K2O=0.05%。
Example 3: taking 300mL of each of 2 parts of purified solution (wherein V is 51.99g/L, Na is 100.1g/L), respectively adjusting the pH value to 0.50 and 0.70 by hydrochloric acid (1+1) under stirring, wherein the pH value is not more than +/-0.01 within 20s, putting the purified solution into a room-temperature water bath kettle, stirring the vanadium precipitation solution at the speed of 400r/min, heating to boiling for 35min (supplementing the vanadium precipitation solution with boiling water in time during boiling for evaporation), taking out the solution, carrying out solid-liquid suction filtration separation, washing the precipitated red vanadium by using 10g/L of ammonium chloride solution, and obtaining the ammonium salt solution (mL): precipitating red vanadium (g) at a liquid-solid ratio of 2.0: 1, stirring to disperse the red vanadium, filtering to dry, repeating the steps for 4 times, heating the red vanadium in a muffle furnace to melt, taking out, pouring out and cooling to form flaky vanadium pentoxide.
Through the inspection: 1. the precipitation rate of vanadium with a pH value of 0.50 is 97.76%, and V in vanadium pentoxide is2O5=99.61%、Na2O=0.29%、K2O=0.02%。
2. The precipitation rate of vanadium with pH of 0.70 is 99.48%, and V in vanadium pentoxide is2O5=98.91%、Na2O=0.72%、K2O=0.05%。
Example 4: taking 300mL of each of 2 parts of purified solution (wherein V is 14.82g/L, Na is 31.85g/L), respectively adjusting the pH to 1.30 and 1.60 by hydrochloric acid (1+1) under stirring, wherein the pH value is not more than +/-0.01 within 20s, putting the purified solution into a room-temperature water bath kettle, stirring the vanadium precipitation solution at the speed of 350r/min, heating to boil for 60min (the boiling water is used for supplementing the evaporation reduction amount of the vanadium precipitation solution in time in the boiling process), taking out, carrying out solid-liquid suction filtration separation, washing the precipitated red vanadium by using 10g/L of ammonium chloride solution, and obtaining the ammonium salt solution (mL): precipitating red vanadium (g) at a liquid-solid ratio of 2.0: 1, stirring to disperse the red vanadium, filtering to dry, repeating the steps for 2 times, heating the red vanadium in a muffle furnace to melt, taking out, pouring out, and cooling to obtain flaky vanadium pentoxide.
Through the inspection: 1. the vanadium deposition rate of the vanadium pentoxide is 98.52 percent, and V is contained in the vanadium pentoxide2O5=99.62%、Na2O=0.37%、K2O=0.02%。
2. The vanadium deposition rate of the vanadium pentoxide is 99.03 percent, and V is contained in the vanadium pentoxide2O5=98.72%、Na2O=0.86%、K2O=0.04%。
Example 5: taking 300mL of each of 2 parts of purified solution (wherein V is 27.31g/L, Na is 54.6g/L, and Cr is 20.22g/L), respectively adjusting the pH value to 1.20 and 1.40 by hydrochloric acid (1+1) under stirring, wherein the pH value is not more than +/-0.01 within 20s, putting the purified solution into a room-temperature water bath kettle, stirring the vanadium precipitation solution at the speed of 350r/min, heating to boiling, then 50min (the evaporation reduction amount of the vanadium precipitation solution is timely compensated by boiling water in the boiling process), taking out, carrying out suction filtration and separation, washing the precipitated vanadium with 10g/L of ammonium chloride solution, and obtaining the ammonium salt solution (mL): precipitating red vanadium (g) at a liquid-solid ratio of 2.0: 1, stirring to disperse the red vanadium, filtering to dry, repeating the steps for 3 times, heating the red vanadium in a muffle furnace to melt, taking out, pouring out, and cooling to obtain flaky vanadium pentoxide.
Through the inspection: 1. the vanadium deposition rate of pH1.20 is 99.30%, and V in the vanadium pentoxide2O5=99.35%、Na2O=0.43%、K2O=0.03%、Cr=0.083%。
2. The vanadium deposition rate of the vanadium pentoxide is 99.51 percent, and V is contained in the vanadium pentoxide2O5=98.22%、Na2O=1.36%、K2O=0.07%、Cr=0.121%。
Comparative example: taking 300mL of each of 2 parts of purified solution (wherein V is 24.58g/L, Na is 60.1g/L), respectively adjusting the pH value to 1.20 and 1.40 by using sulfuric acid (1+1) under stirring, wherein the pH value is not more than +/-0.01 within 20s, putting the purified solution into a room-temperature water bath kettle, stirring the vanadium precipitation solution at the speed of 350r/min, heating to boiling for 50min (supplementing the vanadium precipitation solution with boiling water in time during boiling for evaporation), taking out the solution, carrying out solid-liquid suction filtration separation, washing the precipitated red vanadium by using 10g/L of ammonium chloride solution, and obtaining the ammonium salt solution (mL): precipitating red vanadium (g) at a liquid-solid ratio of 1.5: 1, stirring to disperse the red vanadium, filtering to dry, repeating the steps for 3 times, heating the red vanadium in a muffle furnace to melt, taking out, pouring out, and cooling to obtain flaky vanadium pentoxide.
Through the inspection: 1. the vanadium deposition rate of pH1.20 is 98.07%, and V in the vanadium pentoxide is2O5=98.57%、Si=0.164%、Fe=0.02%、P=0.004%、S=0.026%。Na2O=0.76%、K2O=0.05%、Cr=0.109%。
2. The vanadium deposition rate of the vanadium pentoxide is 99.22 percent, and V is contained in the vanadium pentoxide2O5=97.87%、Si=0.246%、Fe=0.04%、P=0.008%、S=0.039%。Na2O=1.22%、K2O=0.09%、Cr=0.122%。
The above implementationIn the examples, 2 portions of different pH values of the same purification solution were used for vanadium precipitation, only to compare the vanadium precipitation rate with the V obtained2O5The difference of product purity does not require 2 times of vanadium precipitation for the same purifying liquid.
In the above embodiment, the vanadium deposition rate is determined by the percentage of the difference between the total vanadium amount in the purifying solution for vanadium deposition and the vanadium amount in the vanadium deposition supernatant solution in the total vanadium amount.
As can be seen from the above, the vanadium precipitation rate of the embodiment of the method of the invention is 97.76-99.70%, and the V of the obtained vanadium flake2O5The content is 98.22-99.62%. As can be seen from the comparison between example 1 and the comparative example, the hydrochloric acid has a higher vanadium deposition rate and a higher vanadium pentoxide purity than sulfuric acid under the same experimental conditions. The method of the invention is based on equipment and facilities for precipitating vanadium from ortho-acidic ammonium salt, and does not need additional equipment and facilities except for replacing sulfuric acid with hydrochloric acid. Simple process, less working procedures and high production efficiency. The method of the invention uses hydrochloric acid to precipitate vanadium, uses solution with low ammonium salt concentration to wash and precipitate red vanadium, uses 1/10 of ammonium salt to precipitate vanadium, can increase the recycling times of the washing filtrate, and can greatly reduce environmental pollution and wastewater treatment cost.

Claims (10)

1. The method for precipitating vanadium by using hydrochloric acid for the sodium salt roasting water leaching purification solution is characterized by comprising the following steps of:
a. under the stirring state, hydrochloric acid is used for adjusting the pH value of the purifying solution to 0.50-1.60, and the pH value is kept stable;
b. b, under the stirring state, putting the solution treated in the step a into a water bath kettle, heating the water bath kettle until the water is boiled, and keeping the boiling time to be more than or equal to 35 min;
c. b, filtering the liquid treated in the step b to obtain red vanadium precipitate, and washing the red vanadium precipitate by using an ammonium salt solution;
d. and c, heating the red vanadium washed in the step c to be molten, and cooling to obtain vanadium pentoxide.
2. The method for precipitating vanadium from sodium roasting water leaching purification solution by hydrochloric acid as claimed in claim 1, characterized in that: in the step a, the purifying solution is obtained by leaching solution obtained by a sodium roasting water leaching process and removing impurities from calcium salt, aluminum salt or magnesium salt.
3. The method for precipitating vanadium from sodium roasting water leaching purification solution by hydrochloric acid as claimed in claim 1, characterized in that: in the step a, the concentration of vanadium in the purifying liquid is 10-70 g/L.
4. The method for precipitating vanadium from sodium roasting water leaching purification solution by hydrochloric acid as claimed in claim 1, characterized in that: in the step a, the condition of keeping the pH value stable is that the pH value is changed to more than +/-0.05 within 10-30 s.
5. The method for precipitating vanadium from sodium roasting water leaching purification solution by hydrochloric acid as claimed in claim 1, characterized in that: in the steps a and b, the stirring speed is 300-400 r/min.
6. The method for precipitating vanadium from sodium roasting water leaching purification solution by hydrochloric acid as claimed in claim 1, characterized in that: and in the step b, in the boiling process, timely supplementing the reduced amount of the vanadium precipitation solution by using boiling water.
7. The method for precipitating vanadium from sodium roasting water leaching purification solution by hydrochloric acid as claimed in claim 1, characterized in that: in the step c, the washing method comprises the following steps: according to the liquid-solid ratio of ammonium salt solution to precipitated red vanadium of 1.3-2.0mL to 1g, stirring to disperse red vanadium, filtering to dry, and repeating for 2-4 times.
8. The method for precipitating vanadium from sodium roasting water leaching purification solution by hydrochloric acid as claimed in claim 7, characterized in that: ammonium salt solution precipitated red vanadium 1.4-1.6 mL: 1 g.
9. The method for precipitating vanadium from sodium roasting water leaching purification solution by hydrochloric acid as claimed in claim 1, characterized in that: in the step c, the concentration of the ammonium salt solution is 5-50g/L, and the ammonium salt is at least one of ammonium chloride, ammonium sulfate, ammonium nitrate and ammonium acetate.
10. The method for precipitating vanadium from sodium roasting water leaching purification solution by hydrochloric acid as claimed in claim 9, characterized in that: the ammonium salt is ammonium chloride, and the concentration of the ammonium salt solution is 7-12 g/L.
CN202110425663.8A 2021-04-20 2021-04-20 Method for precipitating vanadium from sodium roasting water leaching purification solution by hydrochloric acid Pending CN113151684A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1221243A (en) * 1984-02-01 1987-05-05 Thomas H. Etsell Vanadium recovery from ash from oil sands
CN102167400A (en) * 2011-03-18 2011-08-31 中南大学 Method for preparing vanadium pentoxide from vanadium-containing solution
CN102336437A (en) * 2011-09-06 2012-02-01 中南大学 Process for producing vanadium pentoxide by vanadium-contained solution

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1221243A (en) * 1984-02-01 1987-05-05 Thomas H. Etsell Vanadium recovery from ash from oil sands
CN102167400A (en) * 2011-03-18 2011-08-31 中南大学 Method for preparing vanadium pentoxide from vanadium-containing solution
CN102336437A (en) * 2011-09-06 2012-02-01 中南大学 Process for producing vanadium pentoxide by vanadium-contained solution

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