Method for preparing metal vanadium

A metal and crude vanadium technology, applied in the field of metallurgy, can solve the problems of high production cost, high electrolysis energy consumption, and high equipment requirements, and achieve the effects of low cost, simple process steps and broad application prospects.

Inactive Publication Date: 2011-02-09
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it has the following defects: 1. High energy consumption, including the electric energy required for electrolysis and the heat energy required to maintain the electrolysis temperature; 2. The current efficiency is relatively low, which can only be maintained at about 60%; 3. For electrolysis equipment The requirements are high. Due to the high current density of molten salt electrolysis and the corrosiveness of molten salt, the electrolytic reaction device is easy to corrode, so a special alloy reaction device is required, and the cost is high
This method has the following defects: 1, the cathode product is not completely deoxidized, and the deoxidation reaction is only carried out on the surface of the oxide; 2, the obtained cathode product has poor mechanical properties and is fragile; 3, the electrolysis energy consumption is high, which is harmful to the electrolysis equipment High demand, low output
However, this method requires high equipment and may also cause heavy metal pollution to the environment.
[0007] The patent application with the application number 200910300085.4 discloses a "method for preparing low-oxygen metal vanadium", which uses oxygen-containing vanadium hydride powder or oxygen-containing metal vanadium powder as the vanadium-containing raw material, and adopts calcithermal reaction + acid washing method, which is a typical calcareous method, and its production cost is relatively high

Method used

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Experimental program
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Effect test

preparation example Construction

[0020] a, the preparation of crude vanadium: take vanadium trioxide and vanadium pentoxide as raw materials, take Al powder as reducing agent, ignition reduction makes crude vanadium and slag; Wherein, the weight ratio of vanadium trioxide and vanadium pentoxide The ratio is 1:1~2, and the amount of Al powder is 0.6~0.9 times of the theoretical amount of V when the raw material is completely reduced;

[0021] b. Refining: Vacuum refining to obtain metal vanadium.

[0022] Wherein, in order to improve the purity of the prepared metal vanadium, the purity of the vanadium trioxide and vanadium pentoxide described in step a above is preferably ≥99.9%, and the purity of the Al powder is preferably ≥99.7%.

[0023] Wherein, because the vanadium content in the obtained slag of the present invention is higher, in order to make full use of the vanadium resource, avoid resource waste, the slag obtained in the above step a can be used as the lining of the reaction furnace, and can also b...

Embodiment 1

[0030] Embodiment 1 adopts the inventive method to prepare metal vanadium

[0031] Get 4000g of vanadium oxide mixture, wherein the weight ratio of vanadium trioxide and vanadium pentoxide is 1:1, and the aluminum powder addition ratio is 0.7 (that is, 0.7 times of theoretical aluminum consumption, the same below), to analyze The pure barium peroxide mixture is used as the ignition agent, and the aluminothermic reduction reaction is carried out in the aluminothermic reduction reaction furnace, and the reaction ends in 61 seconds. After the aluminothermic reaction is completed, 1650g of crude vanadium with a vanadium content (mass percentage, the same below) of 99.5% is generated, and the crude vanadium is put into a vacuum melting furnace, and melted for 4 hours at a vacuum degree of 0.255Pa and a melting temperature of 2000°C , remove nitrogen, oxygen, hydrogen, aluminum and other impurities to obtain 1600g of vacuum smelted product.

[0032] A part of the aluminothermic rea...

Embodiment 2

[0034] Embodiment 2 adopts the inventive method to prepare metal vanadium

[0035] Get 40kg of vanadium oxide mixture, wherein the weight ratio of vanadium trioxide and vanadium pentoxide is 1:2, the aluminum matching coefficient added by aluminum powder is 0.9, and the amount of limestone added is 2kg, with analytically pure barium peroxide as ignition agent , the aluminothermic reduction reaction is carried out in the aluminothermic reduction reaction furnace, and the reaction ends in 70 seconds. After the aluminothermic reaction is completed, 21kg of crude vanadium with a vanadium content of 99.4% is produced. Put the crude vanadium into a vacuum melting furnace and melt for 10 hours at a vacuum degree of 0.133Pa and a temperature of 2200°C to remove nitrogen, oxygen, hydrogen, aluminum, etc. Impurities were removed to obtain 20kg vacuum smelting product.

[0036] A part of the aluminothermic reaction slag is used as the lining of the aluminothermic reduction reaction furn...

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Abstract

The invention relates to a method for preparing metal vanadium, and belongs to the field of metallurgy. The technical problem to be solved is to provide a method for preparing the metal vanadium with low production cost. The method for preparing the metal vanadium comprises the following steps of: a, preparing crude vanadium, namely igniting and reducing vanadium trioxide and vanadium pentoxide serving as raw materials by using Al powder as a reducing agent to obtain the crude vanadium and slag, wherein the weight ratio of the vanadium trioxide to the vanadium pentoxide is 1:1-2, and the using amount of the Al powder is 0.6 to 0.9 time the theoretical using amount of the raw materials when the raw materials are completely reduced into vanadium (V) (the theoretical using amount is the using amount of the Al powder required for completely reducing the vanadium trioxide and the vanadium pentoxide serving as the raw materials into the metal vanadium); and b, refining, namely performing vacuum refining to obtain the metal vanadium.

Description

technical field [0001] The invention relates to a method for preparing metal vanadium, which belongs to the field of metallurgy. Background technique [0002] High-purity metal vanadium powder can be smelted at high temperature into pure vanadium profiles, which can be used as structural materials for ships and seamless thin-walled tubes for chemical containers, and can also be smelted with other metals to form vanadium-based alloys to make superconducting materials, vacuum tube filaments Wait. Especially with its good nuclear physical properties, it can be used as a fuel wrapping material for sodium-cooled fast neutron reactors, and as a material for air-cooled fast neutron reactors. [0003] The usual methods for producing high-purity metal vanadium include molten salt electrolytic refining, molten salt electrodeoxidation, vacuum smelting, regional smelting and purification, iodide thermal decomposition refining, electromigration refining, and calcithermal method. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B5/04
Inventor 孟伟巍孙朝晖鲜勇陈海军刘学文
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES
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