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Impurity removing method of vanadium solution

A technology of solution and vanadium solution is applied in the field of wet vanadium extraction to achieve the effect of reducing vanadium loss and improving precipitation rate

Inactive Publication Date: 2013-01-23
攀钢集团西昌钢钒有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In summary, it can be seen that the vanadium solution impurity removal method of the prior art does not involve the removal of impurities that affect the precipitation effect, such as Fe 2+ other reducing substances

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0041] Get 200ml vanadium liquid, the total content of vanadium is 25g / l, wherein, V 4+ The content is 10g / l, Fe 2+ The content is 6g / l. Stir in a beaker and heat to 40°C; add 10g of ammonium sulfate to the vanadium solution and stir to make it completely dissolve within 3min; then add 8g of precipitant, continue stirring for 3min and then add it to the vanadium solution Concentrated sulfuric acid until the pH of the vanadium solution is adjusted to 1.9; continue to heat the vanadium solution to 90°C, and precipitate at a constant temperature of 90°C for 90min; finally, filter and wash the vanadium solution to obtain vanadate. The removal rate of ferrous iron reached 99.6%, and the loss rate of vanadium was 0.3%.

example 2

[0043] Get 200ml vanadium liquid, the total content of vanadium is 15g / l, wherein, V 4+ The content is 5g / l, Fe 2+ The content is 4g / l, stir in a beaker and heat to 30°C; while stirring, add 8g of potassium permanganate to the vanadium solution to completely dissolve it within 3min; then add 8g of precipitant and continue stirring After 1 minute, add concentrated sulfuric acid to the vanadium solution until the pH of the vanadium solution is adjusted to 1.5; continue to heat the vanadium solution to 80°C to 100°C, and precipitate at a constant temperature of 80°C for 120 minutes; finally, filter and wash the vanadium solution to obtain vanadium acid Salt. The removal rate of ferrous iron reaches 99.1%, and the loss rate of vanadium is 0.5%.

example 3

[0045] Get 200ml vanadium liquid, the total content of vanadium is 35g / l, wherein, V 4+ The content is 15g / l, Fe 2+ The content is 8g / l, stir in a beaker and heat to 70°C; while stirring, add 15g of hydrogen peroxide to the vanadium solution to make it completely dissolve within 3min; then add 8g of precipitant, continue stirring for 5min and then add Add concentrated sulfuric acid to the vanadium solution until the pH of the vanadium solution is adjusted to 2.2; continue to heat the vanadium solution to 100°C, and precipitate at a constant temperature of 80°C to 100°C for 60 minutes; finally, filter and wash the vanadium solution to obtain vanadate. The removal rate of ferrous iron reached 99.3%, and the loss rate of vanadium was 0.4%.

[0046] Known by the examples of the present invention, according to the impurity removal method of the vanadium solution of the present invention, the impurity removal rate is more than 99%, and the loss of vanadium is controlled within 0.5%...

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Abstract

The invention discloses an impurity removing method of vanadium solution. The impurity removing method comprises steps as follows: a, adding an oxidant which is capable of respectively oxidizing Fe<2+> and V<4+> in the vanadium solution into Fe<3+> and V<5+> to the vanadium solution based on the contents of Fe<2+> and V<4+> in the vanadium solution, so as to remove impurities; b, adding a precipitating agent to the impurity-removed vanadium solution, and agitating so as to completely dissolve an impurity removing agent within 3 minutes; c, adjusting the pH (Potential Of Hydrogen) of the vanadium solution to reach 1.5-2.2 by virtue of sulfuric acid; d, heating the vanadium solution of which the pH is adjusted, and precipitating the vanadium solution for 60-150 minutes at 80-100 DEG C; and e, carrying out solid-liquid separation to the precipitated vanadium solution by virtue of common methods such as filtering, and then washing to obtain vanadate. With the adoption of the method disclosed by the invention, the impurity Fe2<+> which is disadvantageous for be precipitated can be removed from the vanadium solution, so that the precipitating rate in precipitating and producing process can be improved; and meanwhile, the tetravalent vanadium is reduced into pentavalent by virtue of the oxidant, so that the loss of the vanadium is decreased.

Description

technical field [0001] The invention relates to the technical field of vanadium extraction by wet method, in particular to a method for removing impurities from a vanadium solution. Background technique [0002] In the prior art, the vanadium slag is processed through crushing, grinding, roasting, leaching, precipitation and other processes to obtain vanadate substances. During the whole vanadium extraction process, the vanadium liquid contains many impurities due to various reasons. If these are not removed , will enter the vanadate and affect the quality of vanadium products, and the existence of some impurities may even affect the precipitation rate during the precipitation process, thereby reducing the recovery rate of vanadium element and causing serious loss of vanadium during the precipitation process. [0003] As mentioned in the Chinese patent literature with the publication number CN101182036A, by using hydrochloric acid to adjust the pH value of the vanadium-conta...

Claims

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Application Information

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IPC IPC(8): C22B3/44C22B34/22
CPCY02P10/20
Inventor 张林刘武汉刘恢前刘波冯光磊杨雄钟国梅
Owner 攀钢集团西昌钢钒有限公司
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