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A kind of production method of vanadium trioxide

A technology of vanadium trioxide and production method, applied in vanadium oxide and other directions, can solve the problems of poor reduction effect, unstable product quality, weak safety, etc., achieve cost saving, avoid large fluctuations in product quality, and high safety Effect

Active Publication Date: 2016-03-16
湖北晶洋科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects and problems of poor reduction effect, unstable product quality and weak safety in the prior art, and provide a trioxide with good reduction effect, stable product quality and strong safety. Production method of divanadium

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A production method of vanadium trioxide, which sequentially comprises a preparation process of charge, a roasting process of charge, and a process of cooling out of the furnace;

[0042] The preparation process of the charge: first mix the ammonium vanadate compound, the reducing agent, and the catalyst uniformly in a mass ratio of 60:15:2 to obtain a mixture, and then place the mixture for 4-8 hours to obtain the charge; the ammonium vanadate The compound is ammonium polyvanadate or ammonium metavanadate or ammonium orthovanadate or ammonium pyrovanadate or any combination thereof, and the vanadium content of the ammonium vanadate compound is 42%-50%; the reducing agent is flake graphite powder or carbon black or charcoal powder or graphite electrode carbon powder or any combination thereof; the catalyst is calcium fluoride or calcium oxide or calcium carbonate or any combination thereof; the ammonium vanadate compound needs to be pretreated before mixing , the pretre...

Embodiment 2

[0046] Basic technology is the same as embodiment 1, and difference is:

[0047] The mass ratio of ammonium vanadate compound, reducing agent and catalyst is 70:20:3;

[0048] The temperature in the dehydration stage is 330°C, the temperature in the deammonization stage is 500°C, and the temperature in the reduction stage is 770°C;

[0049] The vanadium content of the finally prepared vanadium trioxide is 63.15%.

Embodiment 3

[0051] Basic technology is the same as embodiment 1, and difference is:

[0052] The mass ratio of ammonium vanadate compound, reducing agent and catalyst is 74:25:4;

[0053] The temperature in the dehydration stage is 350°C, the temperature in the deammonization stage is 570°C, and the temperature in the reduction stage is 800°C;

[0054] The vanadium content of the finally prepared vanadium trioxide is 64%.

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PUM

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Abstract

The invention relates to a production method of vanadium trioxide, which comprises the following steps: uniformly mixing an ammonium vanadate compound, a reducer and a catalyst in a mass ratio of (60-74):(15-25):(2-4), and standing to obtain a furnace material, wherein the ammonium vanadate compound is ammonium polyvanadate or ammonium metavanadate or ammonium orthovanadate or ammonium pyrovanadate or any combination thereof, the reducer is flake graphite powder or carbon black or powdered charcoal or graphite electrode carbon powder or any combination thereof, and the catalyst is calcium fluoride or calcium oxide or calcium carbonate or any composition thereof; sending the furnace material into a closed roasting furnace in a nitrogen protective atmosphere to carry out closed roasting, wherein the furnace material is sequentially subjected to dewatering, ammonium removal and reduction to obtain a roasting product; and cooling the roasting product, and discharging to obtain the vanadium trioxide with the vanadium content of 62-64%. The method has the advantages of favorable reduction effect, stable product quality, lower cost and higher safety.

Description

technical field [0001] The invention relates to a method for preparing raw materials of high-quality vanadium products, in particular to a method for producing vanadium trioxide, which is particularly suitable for using a solid reducing agent to improve the quality of vanadium trioxide. Background technique [0002] At present, when producing vanadium-nitrogen alloys, most manufacturers use vanadium pentoxide as raw material, and only one in China produces vanadium trioxide with vanadium trioxide as raw material. The production of vanadium-nitrogen alloys with vanadium pentoxide is difficult, unstable in quality, low in yield, and high in energy consumption. Therefore, it is the trend of the times to produce vanadium-nitrogen alloys with vanadium trioxide. The existing production of vanadium trioxide is mostly obtained by grinding and drying ammonium polyvanadate, and then reducing it with high-temperature gas in a rotary kiln. This process requires a high reduction temperat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/02
Inventor 甘锦旺高向山
Owner 湖北晶洋科技有限公司