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Extraction vanadium recovery process

An extraction and process technology, applied in the field of vanadium extraction process, can solve the problems of low efficiency of single-stage extraction, cumbersome multi-stage extraction, and large loss of extraction agent, so as to reduce the number of extraction stages and oxidation processes, increase extraction capacity, and reduce price. low effect

Active Publication Date: 2017-10-13
KAIFENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the existing vanadium extraction technology, due to improper treatment of industrial "three wastes", it is easy to cause environmental pollution, and there are problems such as low single-stage extraction efficiency, multi-stage extraction is cumbersome and large loss of extractant, so the application is limited

Method used

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  • Extraction vanadium recovery process
  • Extraction vanadium recovery process
  • Extraction vanadium recovery process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: extraction vanadium extraction process comprises the following steps:

[0042] 1) Obtain the original extract

[0043] a. Grind the particle size of the spent vanadium catalyst to less than 375 μm, immerse in water at a temperature of 100°C and leaching for 1.5 hours, filter to obtain the water leaching filtrate and water leaching filter residue, and wash the water leaching filter residue with water until neutral Obtain water immersion residue, water immersion filtrate, and washing liquid are combined to obtain water immersion liquid, and water immersion residue and water immersion liquid are respectively collected for subsequent use;

[0044] b. to the water leaching slag obtained in step a at a liquid-solid ratio of 2ml:1g, H 2 SO 4 Adding the reducing agent potassium sulfite under the condition that the mass percent concentration is 12%, performing reducing acid leaching, filtering to obtain the reducing acid leaching solution and reducing acid leachi...

Embodiment 2

[0049] Embodiment 2: extraction process for vanadium extraction, comprising the following steps:

[0050] 1) Obtain the original extract

[0051] a. Grind the particle size of the spent vanadium catalyst to less than 375 μm, immerse in water at a temperature of 100°C and leaching for 1.5 hours, filter to obtain the water leaching filtrate and water leaching filter residue, and wash the water leaching filter residue with water until neutral Obtain water immersion residue, water immersion filtrate, and washing liquid are combined to obtain water immersion liquid, and water immersion residue and water immersion liquid are respectively collected for subsequent use;

[0052] b. to the water leaching slag obtained in step a at a liquid-solid ratio of 2ml:1g, H 2 SO 4 Adding the reducing agent potassium sulfite under the condition that the mass percent concentration is 12%, performing reducing acid leaching, filtering to obtain the reducing acid leaching solution and reducing acid ...

Embodiment 3

[0057] Embodiment 3: extract vanadium extraction process, comprise the following steps:

[0058] 1) Obtain the original extract

[0059] a. Grind the particle size of the spent vanadium catalyst to less than 375 μm, immerse in water at a temperature of 100°C and leaching for 1.5 hours, filter to obtain the water leaching filtrate and water leaching filter residue, and wash the water leaching filter residue with water until neutral Obtain water immersion residue, water immersion filtrate, and washing liquid are combined to obtain water immersion liquid, and water immersion residue and water immersion liquid are respectively collected for subsequent use;

[0060] b. to the water leaching slag obtained in step a at a liquid-solid ratio of 2ml:1g, H 2 SO 4 Adding the reducing agent potassium sulfite under the condition that the mass percent concentration is 12%, performing reducing acid leaching, filtering to obtain the reducing acid leaching solution and reducing acid leaching ...

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Abstract

The invention discloses an extraction vanadium recovery process. Spent vanadium catalysts are subjected to water leaching and reductive acid leaching treatment to obtain VOSO4-containing extracted raw liquid, the raw liquid is subjected to the single-stage extraction, tail liquid concentration, separate reextraction and back extraction vanadium recovery process, vanadium precipitation is carried out with ammonium hydroxide, and roasting is conducted to produce vanadium pentoxide. Saponified P204 is adopted as a main extraction agent, it is ensured that the pH value of the whole system is within the optimal pH value range in the extraction process, the extraction system can maintain a stable pH value, and the single-stage extraction rate of vanadium is greatly improved to above 96.4%; tetravalent vanadium obtained through extraction can be directly subjected to vanadium precipitation without oxidation, a high-purity vanadium product is produced, the technological process is simplified, and atmosphere pollution caused by chlorine generated by chlorate vanadium oxide is avoided; meanwhile, the selectivity characteristic of the saponified P204 is utilized, the influences of iron, phosphorus and arsenic on purity of extracted vanadium are effectively avoided, a part of impurity removal work is reduced, raw material consumption is reduced, enterprise cost is reduced, and economic benefits are remarkable.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a process for extracting vanadium. Background technique [0002] The content of vanadium in the earth's crust occupies the 22nd place, and so far no independent vanadium deposits have been found in nature. As a valuable strategic resource, vanadium is widely used in fields such as aerospace, railway, machinery manufacturing and chemical industry, and automobile. In recent years, with the sharp shortage of vanadium ore resources and the enhancement of people's awareness of environmental protection, the recovery of vanadium from secondary resources, such as vanadium-rich iron slag, spent vanadium catalyst, and lime ash, has attracted widespread attention from scholars at home and abroad. [0003] Generally, the process of recovering vanadium from secondary resources includes processes such as vanadium leaching, vanadium extraction, and vanadium precipitation. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B34/22
CPCC22B7/007C22B34/225Y02A50/20Y02P10/20B01D11/0492
Inventor 郝喜才刘明海焦婵王迪姬学亮李洁
Owner KAIFENG UNIV
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