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Method for directly extracting vanadium from vanadium titan magnetite concentrate

A vanadium-titanium-magnetite concentrate and direct technology are applied in the field of directly extracting vanadium from vanadium-titanium-magnetite concentrate, and can solve the problems of increased energy consumption, long leaching process time and the like

Inactive Publication Date: 2009-02-04
PANGANG GROUP RESEARCH INSTITUTE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, in order to dissolve the soluble sodium vanadate, the pellets need to be soaked many times, so the leaching process takes a long time, which increases the energy consumption

Method used

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  • Method for directly extracting vanadium from vanadium titan magnetite concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Get 2kg of Panzhihua vanadium-titanium magnetite concentrate (particle size: -200 mesh 67%; main component: V 2 o 5 0.769%, TFe 58.66%, FeO 27.08%, SiO2 1.52%, TiO 2 11.09%, MgO 1.63%, MnO 0.432%, Al 2 o 3 3.43%), add 0.12kg of anhydrous sodium sulfate into it, mix well and make pellets, the size of the pellets is 8-10mm, the pellets are heated to 1250°C in the muffle furnace and then kept for 60min; the roasted pellets are ground After the powdered material is leached with hot water, 4L of leaching solution with TV=1.895g / l is obtained, wherein, TV represents the total vanadium content, i.e. the content of metal vanadium; the leaching solution is adsorbed by 717 resin and desorbed by sodium hydroxide to obtain TV=24.3g 300ml of desorption liquid per 1; add 16g calcium chloride precipitation calcium vanadate to desorption liquid, obtain the calcium vanadate of 23.4gTV=30.8%.

Embodiment 2

[0040] Get 2.5kg of Panzhihua vanadium-titanium magnetite concentrate (particle size: -200 mesh 67%; main component: V 2 o 5 0.769%, TFe 58.66%, FeO 27.08%, SiO 2 1.52%, TiO 2 11.09%, MgO 1.63%, MnO 0.432%, Al 2 o 3 3.43%), add 0.15kg of anhydrous sodium sulfate therein, mix and pelletize, the size of the pellets is 8-12mm; the pellets are heated to 1250°C in the muffle furnace and then kept for 60min; the roasted pellets are ground into After the powder is leached with hot water, 4.58L of leaching solution with TV=2.07g / l is obtained; the leaching solution is adsorbed with 717 resin and desorbed with sodium hydroxide to obtain 361ml of desorption solution with TV=25.2g / l; add 20g of chloride Calcium precipitated calcium vanadate, yielding 29.7 g TV=30.2% calcium vanadate.

Embodiment 3

[0042] Get 1.7kg of Panzhihua Baima vanadium-titanium magnetite concentrate (particle size: -200 mesh 67%; main component: V 2 o 5 0.769%, TFe 58.66%, FeO 27.08%, SiO 2 1.52%, TiO 2 11.09%, MgO 1.63%, MnO 0.432%, Al 2 o 3 3.43%), add 0.10kg of anhydrous sodium sulfate therein, mix and make pellets, the size of the pellets is 8-12mm; the pellets are heated to 1250°C in the muffle furnace and then kept for 60min; the roasted pellets are ground into After the powder is leached with hot water, 3.46L of leaching solution with TV=1.86g / l is obtained; the leaching solution is extracted with N-263, back-extracted with sodium hydroxide and sodium chloride, and 361ml of back-extraction solution with TV=23.6g / l is obtained; Add 20 g of calcium chloride to precipitate calcium vanadate into the desorption solution to obtain 20.8 g of calcium vanadate with a TV=29.4%.

[0043] It can be seen from the above three examples that examples 1 and 2 use ion exchange resins to purify the le...

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Abstract

The invention provides a method for directly extracting vanadium from vanadium-titanium magnetite concentrate. The method comprises the steps: a method for directly extracting vanadium from vanadium-titanium magnetite concentrate comprises the steps: sodium sulfate is added into vanadium-titanium magnetite concentrate, and pellet fabrication is carried out after the sodium sulfate and the vanadium-titanium magnetite concentrate are mixed evenly; pellets which are obtained in pellet fabrication go through the high-temperature sodium oxide roasting; the roasted pellets are milled into powders and then are leached and washed by water; the leaching liquid is purified to collect vanadium to obtain vanadium solution; calcium chloride is added into the obtained vanadium solution to deposit calcium vanadate. The method can circularly utilize purified raffinate to avoid the generation of the waste water containing ammonia nitrogen, and can save the water and reduce the energy consumption.

Description

technical field [0001] The invention relates to a method for extracting vanadium from vanadium-titanium magnetite concentrate, more specifically, relates to a method for directly extracting vanadium from vanadium-titanium magnetite concentrate. Background technique [0002] At present, in addition to the method of first reducing iron in vanadium-titanium magnetite concentrate and then extracting vanadium from vanadium-titanium slag, the method of directly extracting vanadium from vanadium-titanium magnetite concentrate has been fully studied at home and abroad. [0003] The industrialization process of directly extracting vanadium from vanadium-titanium magnetite concentrate in foreign countries is: sodium pellet → sodium oxide roasting → powder (or pellet) water leaching → vanadium precipitation → ammonium polyvanadate or ammonium metavanadate. This process enriches the concentration of vanadium in the solution by circulating leaching of leachate. Although the concentration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B1/06
Inventor 付自碧孙朝晖黎建明张林彭毅张帆边悟
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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