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Fluidized reduction furnace for producing high-purity vanadium trioxide and production method

A vanadium trioxide and fluidization technology, applied in the direction of vanadium trioxide, etc., can solve the problems of unsuitability for high-purity vanadium trioxide, unstable product quality, low reaction efficiency, etc., to avoid material agglomeration and improve operation Stability and the effect of improving reaction efficiency

Active Publication Date: 2012-07-11
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The object of the present invention is to provide a kind of equipment and production method for producing high-purity vanadium trioxide, to overcome the low operating rate, low reaction efficiency and unstable product quality of existing fluidized reactors, which are not suitable for producing high-purity vanadium trioxide. Defects such as vanadium oxide

Method used

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  • Fluidized reduction furnace for producing high-purity vanadium trioxide and production method
  • Fluidized reduction furnace for producing high-purity vanadium trioxide and production method
  • Fluidized reduction furnace for producing high-purity vanadium trioxide and production method

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Effect test

Embodiment 1

[0038] With a feed rate of 300kg / h, ammonium vanadate powder enters the figure 1 The eight-layer fluidized reduction furnace shown. The flue gas at 1000°C enters the fluidized reduction furnace from the flue gas inlet and heats it. The temperatures of the first to eighth floors are 353°C, 446°C, 535°C, 603°C, 668°C, 728°C, 780°C, 823°C. 150Nm 3 / h of coke oven gas enters from the air funnel at the bottom of the fluidized reduction furnace, and floats the ammonium vanadate powder that enters from the feed inlet, and the ammonium vanadate powder passes through the first to eighth layers in turn, and is gradually heated and reduced , and finally discharged from the outlet after cooling. The reaction tail gas is discharged from the tail gas outlet of the expansion section; the heat supply medium after heat exchange is discharged from the outlet.

Embodiment 2

[0040] With a feed rate of 200kg / h, the vanadium pentoxide powder enters the five-layer fluidized reduction furnace. The flue gas at 950°C enters the fluidized reduction furnace from the flue gas inlet and heats it. The temperatures of the first to fifth floors are 363°C, 485°C, 598°C, 709°C, and 802°C respectively. 140Nm 3 The coke oven gas per hour enters from the air funnel at the bottom of the fluidized reduction furnace, and the vanadium pentoxide powder that enters from the feed inlet floats up, and the vanadium pentoxide powder passes through the first to fifth layers in sequence, and is gradually Heat reduction, and finally discharged from the discharge port. The reaction tail gas is discharged from the tail gas outlet of the expansion section; the heat supply medium after heat exchange is discharged from the outlet.

Embodiment 3

[0042] At a feed rate of 400kg / h, the ammonium vanadate powder enters the ten-layer fluidized reduction furnace. The flue gas at 1000°C enters the fluidized reduction furnace from the flue gas inlet and heats it. The temperatures of the first to tenth floors are 327°C, 426°C, 515°C, 584°C, 648°C, 702°C, 751°C, 793°C, 823°C, 842°C. 170Nm 3 / h of coke oven gas enters from the air funnel at the bottom of the fluidized reduction furnace, and floats the ammonium vanadate powder that enters from the feed inlet, and the ammonium vanadate powder passes through the first to tenth layers in turn, and is gradually heated and reduced , and finally discharged from the outlet. The reaction tail gas is discharged from the tail gas outlet of the expansion section; the heat supply medium after heat exchange is discharged from the outlet.

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Abstract

The invention relates to a fluidized reduction furnace for producing high-purity vanadium trioxide, which comprises a fluidized bed reactor and a built-in heat exchange component, wherein the heat exchange component is a tube type heat exchanger, and a heat exchange tube is vertically provided with at least two layers of sieve mesh plates to form at least three layers of fluidized reaction chambers. The invention also provides a fluidized reduction method for producing the high-purity vanadium trioxide. The fluidized reduction furnace and the fluidized reduction method have the advantages that firstly, materials in each layer are in a fully-mixed state, and material flow among the layers is in a plug flow state; secondly, the multi-stage fluidized reduction conditions are provided, raw materials enter from the lowermost layer, are reduced step by step and are purified gradually, and the running stability and the operating rate of equipment are improved in a manner of reduction step by step; and thirdly, the fluidized reduction furnace can be used for producing the high-purity vanadium trioxide, and the vanadium grade is larger than 67.9 percent.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a fluidized equipment and a production method for producing vanadium trioxide. Background technique [0002] Vanadium trioxide is gray-black crystal or powder, insoluble in water, soluble in nitric acid, hydrofluoric acid, hot water, slowly absorbing oxygen in the air and transforming into vanadium tetroxide. Vanadium trioxide is an important vanadium compound, which has important applications in metallurgy, electronics, chemical industry and other fields. Vanadium trioxide can be used to produce ferrovanadium, and vanadium trioxide can be made into vanadium carbide or vanadium nitride, etc., and can be directly added to molten steel to produce special steel. Vanadium trioxide can also be used to make metal vanadium powder. In addition, vanadium trioxide can also be directly used in the production of electronic products such as heating elements. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02
Inventor 张涛朱庆山李洪钟
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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