Method for preparing vanadium oxide by using sodium salt roasting lixivium of titanium tetrachloride refined tailings

A titanium tetrachloride, sodium roasting technology, applied in the field of vanadium extraction, can solve the problems of environmental safety hazards, waste of resources, high vanadium content, etc., and achieve good social and economic benefits

Active Publication Date: 2014-09-03
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because it will release a large amount of chlorine gas during the stacking process, which will seriously pollute the environment. At the same time, because the vanadium content in the slag is high, it also causes a waste of resources. Therefore, the existing treatment methods have not fundamentally solved the environmental protection problem. Security risks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0038] Take 1000ml of sodium roasted leaching solution of titanium tetrachloride refined tailings with the ingredients listed in Table 1, heat it to 80°C, then add 10.6g of sodium carbonate and 2g of activated carbon, react for 60min, and filter to obtain a purified solution. Add 132g of ammonium sulfate to the purification solution, control the vanadium precipitation time to 120min, and then filter to obtain ammonium metavanadate. The obtained ammonium metavanadate was dried at 40°C for 12 hours, and then calcined at 550°C for 40 minutes to obtain high-purity vanadium pentoxide.

[0039] After testing, the purity of the obtained vanadium pentoxide is 99.91%, and the content of silicon, chromium, iron, calcium, aluminum and other impurities is less than 0.005%.

example 2

[0041] Take 1000ml of sodium roasted leaching solution of titanium tetrachloride refined tailings with the ingredients listed in Table 1, heat it to 100°C, then add 42.4g of sodium bicarbonate and 5g of activated carbon, react for 20min and filter to obtain a purified solution. Add 236g of ammonium chloride to the purification solution, control the vanadium precipitation time to 40min, and then filter to obtain ammonium metavanadate. The obtained ammonium metavanadate was dried at 50°C for 5 hours, and then calcined at 600°C for 10 minutes to obtain high-purity vanadium pentoxide.

[0042] After testing, the purity of the obtained vanadium pentoxide is 99.96%, and the content of silicon, chromium, iron, calcium, aluminum and other impurities is less than 0.005%.

example 3

[0044] Take 1000ml of sodium roasted leaching solution of titanium tetrachloride refined tailings with the ingredients listed in Table 1, heat it to 90°C, then add 21.2g of sodium carbonate and 3g of activated carbon, react for 40min and filter to obtain a purified solution. Add 208g of ammonium carbonate to the purification solution, control the vanadium precipitation time to 60min, and then filter to obtain ammonium metavanadate. The obtained ammonium metavanadate was dried at 45°C for 10 hours, and then calcined at 580°C for 30 minutes to obtain high-purity vanadium pentoxide.

[0045] After testing, the purity of the obtained vanadium pentoxide is 99.95%, and the content of silicon, chromium, iron, calcium, aluminum and other impurities is less than 0.005%.

[0046] In summary, the process of the present invention is simple and easy to use, requires less equipment, is convenient to operate, has a wide range of application, and is low in cost, and has good social and econom...

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PUM

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Abstract

The invention discloses a method for preparing vanadium oxide by using sodium salt roasting lixivium of titanium tetrachloride refined tailings. The method comprises the following steps: adding an aluminum remover and an adsorbent in heated sodium salt roasting lixivium of titanium tetrachloride refined tailings to remove impurities, and then filtering to obtain purified liquor; adding a soluble ammonium salt into the purified liquor and carrying out molybdenum precipitation, then, filtering to obtain ammonium metavanadate precipitates, washing, drying and roasting the ammonium metavanadate precipitates to obtain vanadium pentoxide. According to the method disclosed by the invention, sodium salt roasting lixivium of titanium tetrachloride refined tailings is directly adopted, molybdenum precipitation is directly carried out after further removing aluminum, and the purity of the prepared titanium tetrachloride is greater than 99.9wt%, the content of impurities such as silicon, chromium, iron, calcium and aluminum, is less than 0.005wt%, the yield of vanadium is over 90wt%, so that not only can a long-term pollution problem of waste slag on environment be solved, but also a vanadium resource is recycled and high-purity vanadium oxide is prepared, so that the method has very good social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of vanadium extraction, and more specifically relates to a method for preparing vanadium oxide by using sodiumized roasting leaching solution of tailing residue refined with titanium tetrachloride. Background technique [0002] Titanium tetrachloride is an important raw material for the production of titanium sponge and titanium dioxide. Usually industrial titanium tetrachloride is prepared by the chlorination method of reacting carbide slag with chlorine gas, but the chlorination method produces only crude titanium tetrachloride , which contains impurities such as oxygen, nitrogen, carbon, vanadium, iron, silicon, calcium, magnesium, etc. and the composition is very complex, especially the main content is VOCl 3 and VCl 4 The vanadium impurity makes titanium tetrachloride yellow or even dark red, which directly affects the quality of sponge titanium and titanium dioxide. Therefore, it is very necessary to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B34/22C01G31/02
CPCY02P10/20
Inventor 殷兆迁彭毅付自碧李良张玉杰
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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