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Production method of high-density ammonium metavanadate

A technology of ammonium metavanadate and its production method, which is applied in the field of metallurgical chemistry of vanadium, can solve problems such as low product quality, difficulty in mixing uniformly, large vanadium oxide dust, etc., and achieve the goals of improving crystallization characteristics, changing solubility, and improving surface tension Effect

Active Publication Date: 2017-02-22
DALIAN RONGKE ENERGY STORAGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Low-density, fine vanadium oxides are not only dusty, but also layered when smelting alloys, making it difficult to mix evenly, and the product quality is low

Method used

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  • Production method of high-density ammonium metavanadate
  • Production method of high-density ammonium metavanadate
  • Production method of high-density ammonium metavanadate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 46g sodium hydroxide, 100gV 2 o 5 Add the powder into water in turn, stir to dissolve, filter the insoluble matter, and set the volume to 1000ml to obtain a clear sodium metavanadate solution, pH 9, containing V 1.05mol / L.

[0039] Add 1g of PAM with a molecular weight of 1 million and stir until completely dissolved;

[0040] The solution was heated up to 45°C, 120g of ammonium chloride was added, and the temperature was kept stirring for 2h;

[0041] Cool down to 25°C and continue stirring for 1h;

[0042] Filter, wash and dry ammonium metavanadate, the measured bulk density is 1.1g / cm 3 , using a microscope to observe the particle state, such as figure 2 .

[0043] Compared figure 1 and figure 2 , it can be seen that the crystal structure of ammonium metavanadate has changed from agglomerates of fine particles to single crystal particles.

Embodiment 2

[0045] Add 100g of ammonium metavanadate to 900ml of water, stir and add 1mol of potassium sulfate;

[0046] Raise the temperature to 85°C to dissolve ammonium metavanadate, remove insoluble matter by filtration, set the volume to 1000ml, V concentration is 1.28mol / L, potassium concentration is 2mol / L;

[0047] Add ammonia to adjust the pH to 9;

[0048] Keep the solution at 80°C, add 150g of ammonium sulfate, and stir to precipitate vanadium for 2 hours;

[0049] Cool down to room temperature and continue stirring for 1 h;

[0050] Filter, wash and dry ammonium metavanadate, the measured bulk density is 1.05g / cm 3

[0051] For micrographs of AMV see image 3 ,Compared figure 1 , figure 2 and image 3 It can be seen that the addition of additives can make ammonium metavanadate from polycrystalline polymerization into fine single crystals, adding additives and increasing the temperature of vanadium precipitation can obtain single crystals and large grains of ammonium me...

Embodiment 3

[0053] Use 1000ml of leaching solution after sodium roasting of vanadium-containing steel slag, containing 0.7mol / L NaVO 3 , containing sodium sulfate 2mol / l, the solution pH9.5.

[0054] Add 10g of magnesium sulfate and stir until completely dissolved;

[0055] The solution was heated to 90°C;

[0056] Add 130g of ammonium sulfate, stir and crystallize for 2h;

[0057] Cool down to room temperature and continue stirring for 1 h;

[0058] Filter, wash and dry ammonium metavanadate, the measured bulk density is 1.15g / cm3 。

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PUM

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Abstract

The invention discloses a production method of high-density ammonium metavanadate. The production method comprises the following main steps: (1) pre-adding an aid into a vanadium-containing solution; (2) heating the solution; (3) adding ammonium salt, so as to obtain an ammonium metavanadate precipitate; (4) cooling to completely precipitate vanadium; and (5) drying. The production method has the advantages that produced ammonium metavanadate is a perfect single crystal with thick particles, and the apparent density is higher than 1g / cm<3>, so that the dust problem in the operation can be effectively solved.

Description

technical field [0001] The invention relates to a production method of high-density ammonium metavanadate, which belongs to the field of metallurgical chemistry of vanadium. Background technique [0002] The production method of ammonium metavanadate is to first obtain vanadium-containing leaching solution, neutralize, purify and remove impurities, adjust pH to 7-9, vanadium exists in the form of metavanadate anion, and add ammonium salt to obtain ammonium metavanadate precipitation. [0003] In the industrial production of ammonium metavanadate, in order to improve the production efficiency, an excessive amount of ammonium salt is often added to the solution to completely precipitate the vanadium in a short time. In this way, the supersaturation of the vanadium precipitation reaction is extremely high, so the obtained The bulk density of ammonium metavanadate is generally very small, 0.3-0.9g / cm 3 , microscopic observation showed irregular agglomeration of fine particles (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00C30B7/14C30B29/30
CPCC01G31/00C01P2004/02C30B7/14C30B29/30
Inventor 宋明明陈彦博曾繁武郝玥
Owner DALIAN RONGKE ENERGY STORAGE GRP CO LTD
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