Method for preparing metal vanadium

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...

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