A method for purifying silicon, phosphorus and arsenic in vanadium-containing solution

A solution and leaching solution technology, applied in the field of arsenic, purification of silicon and phosphorus in vanadium-containing solutions, to achieve the effect of fast purification, less vanadium loss and low price

Active Publication Date: 2021-02-02
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention has the advantages of deep purification of impurities, wide application range, high purification efficiency, less loss of vanadium, simple adsorbent, etc., and does not introduce new impurities in the purification process, overcomes various shortcomings in the prior art, and has good economic efficiency. Benefits and Application Prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] (1) Preparation of adsorbent: Soak commercially available calcium aluminate in water, filter and wash to obtain wet powder, add polyvinyl alcohol with 8.45% calcium aluminate mass as binder, and add 0.5% calcium aluminate polyvinyl alcohol at the same time Carbon powder, 1% starch, and 3% polyethylene glycol pore-forming agent are mixed evenly, and a long granular semi-finished adsorbent is obtained through an extrusion granulation process; it is put into a vacuum drying device and dried at -30°C to The water content is about 4%, take it out and place it in the calcination equipment, control the heating rate to 114.02°C / h, stop heating when the temperature rises to 640.3°C, and after 0.5h of heat preservation, the finished adsorbent is obtained, and the obtained finished adsorbent is loaded into a fixed bed for adsorption In the column, an aluminate adsorption column is obtained;

[0080] (2) Purification of vanadium solution: use weak acid, weak base and water to alter...

Embodiment 2

[0082] (1) Preparation of adsorbent: add the alum obtained by the crystallization of stone coal acid leaching solution into water, stir, dissolve and filter to obtain aluminum hydroxide and filtrate, and then dissolve the gained aluminum hydroxide in alkali to obtain sodium aluminate solution by conventional wet process, add Stir and mix 0.001% ethanolamine and 0.008% polyacrylamide surfactant in sodium aluminate solution, slowly add calcium salt and iron salt, filter and wash to obtain mixed wet powder of calcium aluminate and calcium aluminoferrate; then add aluminate Calcium and calcium aluminum ferrite quality 30% methyl cellulose is used as binder, 2% urea and 5% polyacrylamide are used as pore-forming agent, mix evenly, obtain spherical semi-finished adsorbent by rolling granulation process, will Dry it at 50°C until the water content is about 3%, take it out and place it in the calcination equipment, control the heating rate to 100°C / h, stop heating when the temperature ...

Embodiment 3

[0085] (1) Preparation of adsorbent: react aluminum-containing substance and magnesium-containing substance at high temperature according to the conventional fire process, crush, ball mill, soak in water, filter and wash to obtain magnesium aluminate wet powder; add 1% formazan of magnesium aluminate mass Base cellulose and 20% polyvinyl alcohol as a binder, 10% urea as a pore-forming agent, mix evenly, and obtain a spherical semi-finished adsorbent through a compression granulation process; put it into a vacuum drying equipment and dry at -60 ° C When the water content is about 2.5%, take it out and place it in the calcination equipment, control the heating rate to 300°C / h, stop heating when the temperature rises to 700°C, and keep it warm for 0.5h to obtain the finished adsorbent, which is then loaded into a fixed bed for adsorption In the column, an aluminate adsorption column is obtained;

[0086] (2) Purification of vanadium solution: use weak acid, weak base and water to...

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Abstract

The invention relates to a method for purifying silicon, phosphorus and arsenic in a vanadium-containing solution. The insoluble active aluminate is used as an adsorbent, and an aluminate adsorption column is obtained through processes such as synthesis, granulation, drying, calcination, and column packing. , the vanadium-containing solution is processed through an aluminate adsorption column to remove silicon, phosphorus and arsenic in the solution to obtain a vanadium-containing purification solution. The invention has the advantages of simple purification process, cheap adsorbent, easy preparation, complex pore structure, large specific surface area, large porosity, high mechanical strength, multi-channel utilization, no introduction of new impurities, fast adsorption and purification speed, and high production efficiency. , less loss of vanadium, etc., can achieve deep purification of vanadium-containing solution with a pH of 1-14, and control the concentration of impurities to less than 10ppm. After purification, the vanadium solution can be used to prepare ultra-pure vanadium products, which has good economic benefits and application prospects.

Description

technical field [0001] The invention relates to the technical field of vanadium chemical metallurgy, in particular to a method for purifying silicon, phosphorus and arsenic in a vanadium-containing solution. Background technique [0002] Vanadium is recognized as a scarce resource and an important strategic substance in the world. Due to its excellent alloy properties and catalytic properties, vanadium is widely used in metallurgy, chemical industry, machinery, electronics, automobiles, railways and light industry. 85% of vanadium is Consumption in the steel industry, among which high-purity vanadium oxide is used in high-precision fields such as all-vanadium redox flow batteries, vanadium-aluminum alloys, electrode materials, and catalysts. [0003] The raw materials for the production of vanadium products in my country mainly include vanadium slag, stone coal, and spent vanadium-containing catalysts. No matter what kind of raw materials contain silicon, some raw materials ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/22C22B3/24
CPCC22B3/24C22B34/22Y02P10/20
Inventor 董玉明李会强张笛裴丽丽张红玲徐红彬张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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