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Granular vanadium oxide and production method thereof

A vanadium oxide and production method technology, applied in the direction of vanadium oxide, etc., can solve the problems of uncontrollable average valence state of vanadium in products, large evaporation loss, high energy consumption, etc., reduce impurity content and production energy consumption, and simplify smelting production process, avoiding the effect of the melting process

Active Publication Date: 2014-03-26
大连融科储能集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Vanadium pentoxide consumes a lot of energy during the melting process and has a large evaporation loss
The average valence state of vanadium in the products of this process is very low (<4.1), which is not conducive to the aluminothermic reaction
And the average valence state of vanadium in the product is uncontrollable
[0006] The product purity of the above production methods is not high, and the average valence state of the product vanadium is uncontrollable

Method used

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  • Granular vanadium oxide and production method thereof
  • Granular vanadium oxide and production method thereof

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Embodiment 1

[0028] will V 2 o 5 Powder, ammonium polyvanadate (APV), water, dextrin, and graphite powder were sequentially added to the mixer and mixed. The weight ratio of the raw materials was: 500:350:140:10:2, and mixed for 60 minutes. The mixed powder is continuously added to a disc granulator to obtain a granular vanadium oxide precursor. The above-mentioned precursor particles obtained are continuously fed into the rotary kiln by a vibrating feeder. The heating temperature is 600°C. Nitrogen gas is introduced into the furnace. After heating, the material is decomposed and deaminated, and a partial reduction reaction occurs to obtain particles vanadium oxide, the average valence state of vanadium is +4.76, the total impurity content is 0.108%, the particle diameter is 1-3mm, and the average compressive strength is 90N.

Embodiment 2

[0030] Add ammonium polyvanadate (APV), water, and talcum powder into a mixer in sequence for mixing, the weight ratio of the raw materials is 900:100:0.01, and mix for 30 minutes. The mixed powder is continuously added to the double-roll granulator to obtain the granular vanadium oxide precursor, and the above-mentioned precursor particles obtained are continuously fed into the rotary kiln by a screw feeder, and the heating temperature is 700 ℃, nitrogen gas is introduced into the furnace, and the material is decomposed and deaminated by heating, and a partial reduction reaction occurs to obtain granular vanadium oxide. The average valence state of vanadium is +4.50, the total impurity content is 0.13%, the particle diameter is 5-12mm, and the average compressive strength is 110N.

Embodiment 3

[0032] will V 2 o 5 Powder, ammonium metavanadate (AMV), water, dextrin, and talcum powder were sequentially added to the mixer and mixed. The weight ratio of the raw materials was: 500:468:30:5:0.05, and mixed for 30 minutes. The mixed powder is continuously added to a double-roll granulator to obtain a granular vanadium oxide precursor. The above-mentioned precursor particles obtained are continuously fed into the rotary kiln by a screw feeder, the heating temperature is 600°C, nitrogen gas is introduced into the furnace, and the material is decomposed and deaminated by heating to obtain granular vanadium oxide. The average valence state of vanadium is +4.69, the total impurity content is 0.10%, the particle diameter is 3-9mm, and the average compressive strength is 100N.

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Abstract

The invention relates to a granular vanadium oxide and a production method thereof. The granularity of the granular vanadium oxide is 1-50 mm, the average valence of vanadium is +4.5-(+4.85), and the granular average compressive strength is more than 50 N. The production method comprises the following production steps of a, mixing one or more of the vanadium oxide and vanadium ammonium salt powder with an auxiliary material; b, granulating and processing a mixed raw material into a vanadium oxide precursor granule; c, continuously adding the precursor to a heating container, introducing a gas, heating at the temperature of 500-950 DEG C for 10-120 minutes, carrying out oxidation-reduction reaction on the vanadium oxide precursor granule in the heating container to generate the granular vanadium oxide, and cooling to room temperature under the condition of sealing or gas protection. The granular vanadium oxide can be used for the production of vanadium iron and a vanadium-aluminum alloy, can be used for controlling the reaction degree and enhances the vanadium yield. The product is controllable in granule diameter and granular vanadium valence state. The production method disclosed by the invention is low in energy consumption.

Description

technical field [0001] The present invention relates to a vanadium oxide particle. The invention also relates to a method for the production of the vanadium oxide particles. Background technique [0002] In the smelting of vanadium-aluminum alloys, aluminum is generally used as a reducing agent to produce vanadium-aluminum alloys with different vanadium contents by using the aluminothermic reaction to reduce vanadium oxides. The vanadium oxides actually used are generally flake or powdered vanadium pentoxide. Because the content of pentavalent vanadium in these two raw materials is greater than 98%, the oxygen content is high, and the amount of reducing agent aluminum consumed is relatively large, which increases the production cost, and causes the aluminothermic reaction process to be very violent and the heat release is extremely large. Usually, in order to reduce the amount of aluminum used and control the exothermic heat of the reaction, part of vanadium trioxide is add...

Claims

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Application Information

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IPC IPC(8): C01G31/02
Inventor 宋明明陈彦博郝玥吴大伟阎成友
Owner 大连融科储能集团股份有限公司
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