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Vanadium iron separation method for vanadium-containing solution

A separation method and ferrovanadium technology are applied in the direction of improving process efficiency, which can solve the problems of complex extraction process and inability to discharge directly, and achieve the effects of simple and low process, good effect and high comprehensive utilization rate of resources.

Inactive Publication Date: 2018-09-14
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extraction process is complicated, and stripping is required after extraction. Although ferrovanadium is separated, the raffinate after separation still contains a large amount of iron impurities, which cannot be discharged directly, and still need to be reprocessed

Method used

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Comparison scheme
Effect test

Embodiment 1

[0023] The invention discloses a method for separating ferrovanadium from a vanadium-containing solution. The vanadium-containing solution described in this embodiment is: the concentration of vanadium is 1-2 g / L; the concentration of iron is 3-6 g / L; the concentration of oxalate is 10-20 g / L; the pH value is 2-5.

[0024] The iron-vanadium separation method of the vanadium-containing solution described in the present embodiment is:

[0025] (1) According to the potassium ion in the potassium salt: the material ratio of the iron ion in the vanadium-containing solution is (1~4): 1, the potassium salt is added in the described vanadium-containing solution, and stirred at 80~85° C. 1 ~ 3h, to obtain the liquid after the reaction.

[0026] (2) the liquid after the reaction is left to stand for 3 to 10 hours at 0 to 10° C. and under light-proof conditions, and the solid and liquid are separated to obtain the liquid and filter cake after the separation of vanadium and iron; the liq...

Embodiment 2

[0029] The invention discloses a method for separating ferrovanadium from a vanadium-containing solution. The vanadium-containing solution described in this embodiment is: the concentration of vanadium is 2-3 g / L; the concentration of iron is 5-8 g / L; the concentration of oxalate is 15-25 g / L; the pH value is 1-4.

[0030] The iron-vanadium separation method of the vanadium-containing solution described in the present embodiment is:

[0031] (1) According to the potassium ion in the potassium salt: the material ratio of the iron ion in the vanadium-containing solution is (2~5): 1, the potassium salt is added in the described vanadium-containing solution, and stirred at 85~90°C 1 ~ 3h, to obtain the liquid after the reaction.

[0032] (2) the liquid after the reaction is left standing for 10 to 16 hours at 0 to 10 DEG C and light-proof conditions, and the solid and liquid are separated to obtain the liquid and filter cake after the separation of vanadium and iron; the liquid a...

Embodiment 3

[0035] The invention discloses a method for separating ferrovanadium from a vanadium-containing solution. The vanadium-containing solution described in this embodiment is: the concentration of vanadium is 3-4 g / L; the concentration of iron is 7-10 g / L; the concentration of oxalate is 20-30 g / L; the pH value is 0-3.

[0036] The iron-vanadium separation method of the vanadium-containing solution described in the present embodiment is:

[0037] (1) According to the potassium ion in the potassium salt: the material ratio of the iron ion in the vanadium-containing solution is (3~6): 1, the potassium salt is added in the described vanadium-containing solution, and stirred at 90~95° C. 1 ~ 3h, to obtain the liquid after the reaction.

[0038] (2) the liquid after the reaction is left standing for 16 to 24 hours at 0 to 10 DEG C and light-proof conditions, and the solid and liquid are separated to obtain the liquid and filter cake after the separation of vanadium and iron; the liqui...

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Abstract

The invention relates to a vanadium iron separation method for vanadium-containing solution. According to the technical scheme, according to the potassium ion in potassium salt, specifically, the ratio of substance iron ion in the vanadium-containing solution is (1-6):1, the potassium salt is added into the vanadium-containing solution and is stirred for 1-3 hours at 80-95 DEG C, and reaction solution is obtained. The reaction solution is stationary for 3-24 hours at 0-10 DEG C and under light-proof conditions, the solid-liquid separation is carried out, the solution after the vanadium iron separation and filter cake are obtained; and the solution after the vanadium iron separation is used for further purification and enrichment, and the filter cake is used for further purification of (K3[Fe (C2O4) 3].3H2O). According to the vanadium-containing solution, the vanadium concentration is 1-4 g / L, the iron concentration is 3-10 g / L, the oxalate concentration is 10-30 g / L, and the pH valueis 0-5. The potassium salt is more than one of potassium chloride, potassium sulfate, potassium oxalate and potassium nitrate. The vanadium iron separation method for the vanadium-containing solutionhas simple process and low cost, and has the characteristics of good vanadium iron separation effect, high comprehensive utilization rate of resources and remarkable environmental protection benefit.

Description

technical field [0001] The invention belongs to the technical field of vanadium iron separation. Specifically, it relates to a method for separating ferrovanadium from a vanadium-containing solution. Background technique [0002] Usually, the vanadium-containing solution contains more impurity iron ions. The presence of iron ions will affect the subsequent purification and enrichment process of vanadium and the quality of the final vanadium product. Therefore, it is necessary to separate vanadium-iron from the vanadium-containing solution. [0003] The separation methods of ferrovanadium in vanadium-containing solution mainly include neutralization method, extraction method and precipitation method. The neutralization method mainly realizes the separation of vanadium and iron by adding alkali to precipitate iron in the form of ferric hydroxide; the extraction method is to extract vanadium by adding an extractant to the vanadium-containing solution without extracting iron to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C22B34/22
CPCC22B3/44C22B34/22Y02P10/20
Inventor 张一敏刘子帅刘涛黄晶
Owner WUHAN UNIV OF SCI & TECH
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