Process for extracting vanadium form oxygen tension pickle liquor of high ferro vanadium-containing stone coal

A technology of extraction and vanadium stone, which is applied in the field of metallurgy and chemical industry, can solve the problems of affecting the extraction rate of vanadium, increasing iron content, and large consumption of iron filings, etc., and achieves the effect of simple technical process, low processing cost and high vanadium recovery rate

Inactive Publication Date: 2008-10-22
KUNMING UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

Although iron filings are cheap as a reducing agent, they will increase the iron content in the original solution. Especially when dealing with high-iron leachate, the consumption of iron filings is large, which greatly increases the iron content in the original solution. The potential after reduction is unstable. When the labor intensity increases, it will bring inconvenience to the follow-up process and greatly affect the extraction rate of vanadium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take the stone coal oxygen pressure acid leaching solution containing vanadium 6.20g / L and iron 16.78g / L, according to Fe:Na 2 SO 3 (Molar ratio) than 1:1, add a certain amount of anhydrous sodium sulfite with a purity of ≥97%.

[0020] Stir slowly for 90 minutes at 60°C. Then the leaching solution is cooled to room temperature, the pH of the leaching solution is adjusted to 2.5-3.0 with a concentration of 30-50% NaOH solution, and then the synergistic extraction of vanadium is carried out with a mixed kerosene solvent of 10% P204 and 5% TBP.

[0021] Fe 3+ The reduction rate of iron is 98.89%, the extraction rate of iron is 1.27%, and the extraction rate of vanadium is 95.63%.

Embodiment 2

[0023] Take the stone coal oxygen pressure acid leaching solution containing vanadium 6.20g / L and iron 16.78g / L, according to Fe:Na 2 SO 3 The (molar ratio) ratio is 1:0.75, and a certain amount of anhydrous sodium sulfite with a purity of ≥97% is added.

[0024] Stir slowly for 60 minutes at 50°C. Then the leaching solution is cooled to room temperature, the pH of the leaching solution is adjusted to 2.5-3.0 with 30-50% NaOH solution, and the synergistic extraction of vanadium is carried out with a mixed kerosene solvent of 10% P204 and 5% TBP.

[0025] Fe 3+ The reduction rate of iron is 85.14%, the extraction rate of iron is 8.94%, and the extraction rate of vanadium is 90.16%.

Embodiment 3

[0027] Take the stone coal oxygen pressure acid leaching solution containing vanadium 6.20g / L and iron 16.78g / L, according to Fe:Na 2 SO 3 The (molar ratio) ratio is 1:0.5, and a certain amount of anhydrous sodium sulfite with a purity of ≥97% is added.

[0028] Stir slowly for 30 minutes at 50°C. Then the leaching solution is cooled to room temperature, the pH of the leaching solution is adjusted to 2.5-3.0 with 30-50% NaOH solution, and the synergistic extraction of vanadium is carried out with a mixed kerosene solvent of 10% P204 and 5% TBP.

[0029]Fe 3+ The reduction rate of iron is 73.51%, the extraction rate of iron is 17.45%, and the extraction rate of vanadium is 77.63%.

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Abstract

The invention provides a method for extracting vanadium from ferri containing vanadium bone coal oxygen pressure acid leach solution. The invention relates to a method for extracting vanadium from ferri containing vanadium bone coal oxygen pressure acid leach solution, belonging to the metallurgic-chemical technical field. The method is characterized in that according to the content of iron impurity (Fe<3+>) in leach solution and the percentage needed for completion of the reaction, inorganic salt reducing agents are added, which reduce Fe<3+> in the leach solution into Fe<2+>, and the leach solution is cooled to the room temperature, and the pH value of the leach solution is adjusted by NaOH solution, and the synergistic extraction of vanadium is made by mixing kerosene solvent of P204 and TBP. The method has the advantages of simple technical process, little reagent consumption, low disposal cost, high recovery rate of vanadium and high purity, etc., and is widely applied to the process of extracting vanadium from stone coal acid leach solution.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and chemical industry, and more specifically relates to a method for extracting vanadium from high-iron vanadium-containing stone coal oxygen pressure acid leaching solution. Background technique [0002] The method of oxidative transformation and leaching of vanadium from stone coal under pressure field is a new technology of wet vanadium extraction from stone coal developed by Kunming University of Science and Technology with independent intellectual property rights, and the patent number is 200610011042.0. This invention overcomes the shortcomings and deficiencies of the traditional technology, and provides a simple technical process, high metal recovery rate, easy separation of vanadium, small reagent consumption, concentrated valuable metals, and low pollution from stone coal oxidation under pressure field Method of conversion leaching vanadium. Its technical solution is to add stone coal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B34/22
CPCY02P10/20
Inventor 邓志敢魏昶樊刚李旻廷李存兄
Owner KUNMING UNIV OF SCI & TECH
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