The production method of high purity metal vanadium is using vanadium pentoxide as raw material, Al powder as reducing agent, and using outside furnace smelting to obtain vanadium aluminum alloy ingot. The surface of the ingot was cleaned and cut into uniformly shaped vanadium and aluminium alloy bars, which were welded into vanadium and aluminium alloy bars matching the feed size of the electron beam melting furnace by argon arc welding. The vanadium and aluminum alloy rod is sent into the electron beam melting furnace, and the vacuum is pumped, and the electron beam is used to bombardment the vanadium and aluminum alloy rod to melt into the water-cooled crucible and melt in the water-cooled crucible melting zone. The vanadium metal in the water-cooled crucible is cooled and solidified into vanadium metal ingot. The production cycle of this method is short, the production capacity is large, the environmental pollution is small, and can save energy, the production cost is greatly reduced, the production process does not introduce other impurities, the purity of the product can reach 99.5% ~ 99.9%, suitable for industrial production.
High purity vanadium metal is known as metal "vitamin", with high melting point, good plasticity, good ductility, corrosion resistance and other characteristics, is very widely used. Vanadium metal is an excellent alloy additive, added to alloy steel, can refine the steel grain, thus increasing the strength, toughness and wear resistance of steel. In addition, vanadium has good nuclear physical properties and can be used as a wrapping material for nuclear fuel.
At present, molten salt electrolysis is the main method to produce high purity metal vanadium. This method uses crude metal containing vanadium as soluble anode and produces high purity metal vanadium at cathode through electrochemical refining. But molten salt electrolysis production of high purity metal vanadium production capacity is small, the labor cost is large, to Φ200 molten salt electrolytic furnace as an example, the power is 15KW, the output of metal vanadium is only O. 7kg/ day; The whole electrolytic process requires a large amount of electric energy, high energy consumption, high production cost, restricting the application of vanadium metal; In addition, three kinds of waste salt, K, Ca and Li, are produced in the electrolytic process, which will cause pollution to the environment and need to be treated.
