Method for recovering vanadium from ferric vanadate

A technology from ferric vanadate and ferric vanadate, which is applied in the field of metallurgy, can solve the problems of long process flow, complicated operation, waste of resources, etc., and achieve the effect of short process flow, simple operation and environmental friendliness

Inactive Publication Date: 2019-09-20
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN 104630485 A discloses a method for extracting vanadium from iron vanadate sludge. The steps of the method are: mixing iron vanadate sludge with water and alkali, reacting and dissolving to obtain a mixed slurry; filtering and separating the mixed slurry, Obtain tailings and vanadium-containing aqueous solution; carry out calcification and precipitation on the vanadium-containing solution, and separate solid and liquid to obtain the vanadium precipitation supernatant and calcium vanadate, but this method has many steps, and the water used is deionized water, which requires water quality High, and the iron is not recycled, resulting in waste of resources
[0005] CN 108383165 A discloses a method for preparing ferric vanadate and using it to produce vanadium pentoxide. In this method, vanadium-containing tailings and water are mixed according to a certain mass ratio, and the vanadium precipitate is obtained by adjusting pH, and then calcined Preparation of vanadium pentoxide, but V in the vanadium-containing tailings in this method 2 o 5 The mass fraction of V is 2-6%, and V in the tailings 2 o 5 The content requirement is very high, it is difficult to get practical promotion and application, and there is no recovery of iron
[0006] CN 109234521 A discloses a method for extracting vanadium from vanadium-containing by-product iron vanadate. In the method, iron vanadate and crude vanadium slag are mixed, and sodium carbonate is added to the mixed powder to extract vanadium. After extracting vanadium, the supernatant The ferric vanadate obtained by adding polymeric ferric sulfate to the solution is reused and mixed with crude vanadium slag. Although the principle of this method is simple, adding polymeric ferric sulfate to the supernatant after vanadium extraction will increase the treatment capacity of ferric vanadate , leading to an increase in processing costs
[0007] It can be seen that the current methods for recovering vanadium from ferric vanadate mainly include sodium hydroxide redissolution, direct acid dissolution, sodium (calcification) roasting and recovery of vanadium, etc., but there are disadvantages such as long process flow, complicated operation, and large material consumption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 50g of ferric vanadate and sodium sulfite to 300mL water for beating, wherein the amount of sodium sulfite added is such that Fe 3+ reduced to Fe 2+ and V 5+ Revert to V 4+ 1.1 times the theoretical required amount, add sulfuric acid to the slurry, adjust the pH of the slurry to 0.8, and stir at room temperature for 30 minutes. After the stirring is completed, separate the solid and liquid to obtain the vanadium-containing iron leachate and residue, and keep the leachate;

[0038] Add sodium carbonate to the above leaching solution, adjust the pH to 5.5, stir and react at room temperature for 30 minutes, separate the solid from the liquid, and wash the precipitate with water for 3 times to obtain a vanadium-containing precipitate, which is obtained after vacuum drying;

[0039] The dried vanadium precipitate was calcined in a muffle furnace at 550°C for 120min to obtain V 2 o 5 The product is 23.9g, and the recovery rate of vanadium is about 90%.

Embodiment 2

[0041] Add 200g of ferric vanadate and iron powder into 1000mL water for beating, wherein the amount of iron powder added is such that Fe 3+ reduced to Fe 2 + and V 5+ Revert to V 4+ 1.1 times the theoretical required amount, add sulfuric acid to the slurry, adjust the pH of the slurry to 1.5, and stir at room temperature for 60 minutes. After the stirring is completed, separate the solid and liquid to obtain the vanadium-containing iron leachate and residue, and keep the leachate;

[0042] Add sodium bicarbonate to the above leaching solution, adjust the pH to 6.0, stir and react at room temperature for 60 minutes, separate the solid from the liquid, and wash the precipitate with water for 3 times to obtain a vanadium-containing precipitate, which is obtained after vacuum drying;

[0043] The dried vanadium precipitate was calcined in a muffle furnace at 550°C for 120min to obtain V 2 o 5 The product is 97.92g, and the recovery rate of vanadium is about 92%.

Embodiment 3

[0045] Add 300g of ferric vanadate and sodium bisulfite to 1500mL water for beating, wherein the amount of sodium bisulfite added is such that Fe 3+ reduced to Fe 2+ and V 5+ Revert to V 4+ 1.1 times the amount required in theory, add hydrochloric acid to the slurry, adjust the pH of the slurry to 1.4, and stir at room temperature for 80 minutes. After the stirring is completed, separate the solid and liquid to obtain the vanadium-containing iron leachate and residue, and keep the leachate;

[0046] Add ammonium carbonate to the leaching solution, adjust the pH to 6.5, stir at room temperature for 80 minutes, and the stirring speed is 400r / min, separate the solid from the liquid, and wash the precipitate with water for 3 times to obtain a vanadium-containing precipitate, which is obtained after vacuum drying;

[0047] The dried vanadium precipitate was calcined in a muffle furnace at 550°C for 120min to obtain V 2 o 5 The product is 148.6g, and the recovery rate of vanadiu...

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Abstract

The invention discloses a method for recovering vanadium from ferric vanadate, and belongs to the technical field of metallurgy. The method aims to overcome defects in the process of recovering vanadium from ferric vanadate in the prior art and comprises the steps of adding the ferric vanadate and a reducing agent into water, performing pulping, adjusting the pH value of slurry to 0.8-1.5, and carrying out reduction reaction and solid-liquid separation to obtain a leachate and residues; adjusting the pH value of the leachate to 5-7, and carrying out vanadium precipitation reaction and solid-liquid separation to obtain a vanadium precipitate; and drying and calcining the vanadium precipitate to obtain vanadium pentoxide. The method realizes vanadium-iron separation and vanadium recovery in the ferric vanadate by means of adding water for pulping, reduction through the reducing agent, adding acid for dissolving, vanadium precipitation through an alkaline solution and generating vanadium pentoxide through calcining, thereby providing a new way of recovering vanadium in ferric vanadate.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for recovering vanadium from ferric vanadate. Background technique [0002] As an important strategic resource, vanadium is widely used in metallurgy, chemical industry, national defense, aerospace and other fields. At present, there are many raw materials that can be used to extract vanadium at home and abroad, mainly including vanadium slag and stone coal. The main techniques for extracting vanadium include sodium roasting-water leaching and calcification roasting-acid leaching. Among them, the acid leaching process is to enter the vanadium in the vanadium-containing raw material into the solution in the form of vanadium ions, and then use a precipitant to precipitate the vanadium out of the solution. However, the vanadium concentration obtained by the acid leaching process is not high for materials with low vanadium content, and the ammonium salt vana...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C22B34/22C22B7/00
CPCC22B34/22C22B7/007Y02P10/20
Inventor王俊魏昶邓志敢朱学军杨涛
OwnerKUNMING UNIV OF SCI & TECH