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Vanadium Extraction 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: 2018-12-07
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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  • Vanadium Extraction Process
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  • Vanadium Extraction 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 and vanadium extraction process, may further comprise the steps:

[0050] 1) Get the extract

[0051] a. Grind the particle size of the waste vanadium catalyst to less than 375 μm, soak it in water at a temperature of 100 ° C and leaching for 1.5 hours, filter to obtain a water leaching filtrate and a water leaching filter residue, and wash the water leaching filter residue with water to neutrality The water leaching slag is obtained, the water leaching filtrate and the washing liquid are combined to obtain a water leaching solution, and the water leaching slag and the water leaching solution are respectively collected for subsequent use;

[0052] b. the water leaching residue obtained in step a is 2ml:1g in liquid-solid ratio, H 2 SO 4 The reducing agent potassium sulfite is added under the condition that the mass percentage concentration is 12%, the reducing acid leaching is carried out, the reducing acid leaching solution and the reducing a...

Embodiment 3

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

[0058] 1) Get the extract

[0059] a. Grind the particle size of the waste vanadium catalyst to less than 375 μm, soak it in water at a temperature of 100 ° C and leaching for 1.5 hours, filter to obtain a water leaching filtrate and a water leaching filter residue, and wash the water leaching filter residue with water to neutrality The water leaching slag is obtained, the water leaching filtrate and the washing liquid are combined to obtain a water leaching solution, and the water leaching slag and the water leaching solution are respectively collected for subsequent use;

[0060] b. the water leaching residue obtained in step a is 2ml:1g in liquid-solid ratio, H 2 SO 4 The reducing agent potassium sulfite is added under the condition that the mass percentage concentration is 12%, the reducing acid leaching is carried out, the reducing acid leaching solution and the reducing acid l...

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Abstract

The invention discloses an extraction process for vanadium extraction, which is a vanadium extraction process in which the raw solution containing VOSO4 obtained by immersing waste vanadium catalyst in water and reducing acid leaching is subjected to single-stage extraction, the tail liquid is concentrated, re-extracted separately, and back-extracted. Precipitate vanadium with ammonia water and calcine to produce vanadium pentoxide. The present invention uses saponified P204 as the main extractant to ensure that the pH of the entire system is within the optimum pH range during the extraction process, so that the extraction system maintains a stable pH value and greatly increases the vanadium single-stage extraction rate to over 96.4%; The extracted tetravalent vanadium can be directly precipitated without oxidation to prepare high-purity vanadium products, simplify the process, and avoid air pollution caused by chlorine gas produced by chlorate vanadium oxide. At the same time, using the selective characteristics of saponified P204, not only It effectively avoids the impact of iron, phosphorus and arsenic on the purity of extracted vanadium, and reduces part of the impurity removal work, saves raw material consumption, reduces enterprise costs, and has significant economic benefits.

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 Patents(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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