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Method for extracting vanadium from vanadium-containing solution

An extraction and solution technology, which is applied in the field of vanadium-containing solution extraction and vanadium extraction, can solve the problems of difficult ammonia nitrogen wastewater treatment, complex vanadium-containing solution system, unfavorable vanadium extraction and separation, etc., and achieve continuous production, environmental friendliness, and separation of vanadium and impurities The effect of good effect and simplified operation

Active Publication Date: 2020-03-17
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the traditional method adopts the acid-base neutralization method to adjust the pH value of the solution so that it reaches a suitable range, and there are obvious defects: 1) adding a neutralizer makes the vanadium-containing solution system complicated, which is not conducive to the extraction and separation of vanadium; 2) acid-base neutralization and produce a large amount of high-salt wastewater; 3) entrainment or adsorption of vanadium in the neutralization slag causes vanadium loss and reduces the recovery rate of vanadium
Use ammonia water to adjust the pH value of the solution so that the raffinate contains a large amount of ammonia nitrogen, and the treatment of ammonia nitrogen wastewater is difficult and costly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Embodiment 1 adopts the inventive method to extract vanadium from vanadium-containing solution

[0054] Step 1: Extraction and separation of sulfuric acid The vanadium-containing sulfuric acid solution with a pH value of 1.0 is compared with the organic phase A at an O / A ratio of 1:2 and countercurrently extracted for 5 stages to obtain the extraction stock solution and the loaded organic phase A. The single-stage extraction time is 6 minutes; Among them, the composition of the organic phase A is: the volume fraction of the amine extractant tri-n-octylamine accounts for 48%, and the rest is the diluent sulfonated kerosene;

[0055] Step 2: Extraction and separation of vanadium. The raw liquid and the organic phase B are compared with the O / A ratio of 1:5 and countercurrent extracted for 3 stages to obtain the raffinate and the loaded organic phase B. The single-stage extraction time is 9 minutes; among them, the composition of the organic phase B is : Phosphorous extracta...

Embodiment 2

[0059] Embodiment 2 adopts the inventive method to extract vanadium from vanadium-containing solution

[0060] Step 1: extraction and separation of sulfuric acid. The vanadium-containing sulfuric acid solution with a pH value of 0.9 is compared with the organic phase A at an O / A ratio of 1:2.4 and countercurrently extracted for 3 stages to obtain the original extract and the loaded organic phase A. The single-stage extraction time is 8 minutes; Among them, the composition of the organic phase A is: the amine extraction agent secondary carbon primary amine accounts for 21% by volume, and the rest is diluent sulfonated kerosene;

[0061] Step 2: Extraction and separation of vanadium. The raw liquid and the organic phase B are compared with the O / A ratio of 1:2 and countercurrent extracted for 5 stages to obtain the raffinate and the loaded organic phase B. The single-stage extraction time is 5 minutes; among them, the composition of the organic phase B is : The volume fraction o...

Embodiment 3

[0065] Embodiment 3 adopts the inventive method to extract vanadium from vanadium-containing solution

[0066] Step 1: extraction and separation of sulfuric acid. The vanadium-containing sulfuric acid solution with a pH value of 1.3 is compared with the organic phase A at an O / A ratio of 1:2.8. Countercurrent extraction is carried out in 2 stages to obtain the extraction stock solution and the loaded organic phase A. The single-stage extraction time is 10 minutes; Wherein, the composition of the organic phase A is: the volume fraction of the amine extractant tri(octyl-decyl)alkyl tertiary amine and secondary carbon primary amine accounts for 18%, and the rest is diluent sulfonated kerosene;

[0067] Step 2: Extraction and separation of vanadium. The raw liquid and the organic phase B are compared with the O / A of 1:4 countercurrent extraction for 3 stages to obtain the raffinate and the loaded organic phase B. The single-stage extraction time is 4 minutes; among them, the compos...

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Abstract

The invention relates to a method for extracting vanadium from a solution containing vanadium, and belongs to the field of hydrometallurgy. The invention provides a method for extracting vanadium from a vanadium-containing solution, comprising the following steps: a. extraction and separation of sulfuric acid: taking the vanadium-containing solution, and countercurrently extracting it with an organic phase A containing an amine extractant to obtain an extraction stock solution and a loaded organic phase A; b. Extraction and separation of vanadium: extract the original solution, and use countercurrent extraction with organic phase B containing phosphorus extractant to obtain raffinate and loaded organic phase B; The organic phase B is back-extracted to obtain the lean organic phase B and vanadium-rich solution, and the vanadium-rich solution can be collected; wherein, the vanadium-containing solution is vanadium slag and / or vanadium shale produced by vanadium-titanium magnetite smelting The leaching solution obtained after sulfuric acid leaching. The invention has the advantages of high vanadium extraction rate, good vanadium impurity separation effect, strong production continuity and environmental friendliness, and has broad promotion and application prospects.

Description

technical field [0001] The invention relates to a method for extracting vanadium from a solution containing vanadium, and belongs to the field of hydrometallurgy. Background technique [0002] Vanadium is widely used and its strategic position is extremely important. Raw materials for vanadium extraction in my country mainly include vanadium slag and vanadium shale after smelting vanadium-titanium magnetite. In order to improve the recovery rate of vanadium, additives must be added to the above-mentioned roasting and leaching process of vanadium extraction raw materials to strengthen the dissociation of vanadium-containing minerals. A large number of impurity elements enter the leach solution, therefore, vanadium-hetero-separation is of great significance for the preparation of vanadium products. [0003] At present, acidic extractants such as bis(2-ethylhexyl) phosphate (P204) and 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (P507) are usually used to extract and s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/28C22B3/38C22B34/22
CPCC22B34/22C22B3/28C22B3/38
Inventor 师启华潘成尹丹凤陈海军
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD