A high purity metal vanadium production method, with vanadium pentoxide as raw material, Al powder as reducing agent, smelting by furnace method, aluminum alloy vanadium ingot; The vanadium aluminum alloy ingot was cleaned and cut into vanadium aluminum alloy bars with uniform shape. The vanadium aluminum alloy bars were welded into vanadium aluminum alloy bars matching the feeding size of electron beam melting furnace by argon arc welding. The vanadium aluminum alloy rod is sent into the electron beam melting furnace, vacuumized, and bombarded with electron beam to melt the vanadium aluminum alloy rod into the water-cooled crucible, which is melted in the melting zone of the water-cooled crucible. The liquid vanadium in the water-cooled crucible is solidified into vanadium ingot. This method has the advantages of short production cycle, large production capacity, small environmental pollution, energy saving, greatly reduced production cost, no other impurities introduced in the production process, product purity up to 99.5%-99.9%, suitable for industrial production.
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. However, the production capacity of high purity metal vanadium by molten salt electrolysis method is small and the labor cost is large. Taking the molten salt electrolysis furnace with φ 200 as an example, the output of metal vanadium is only 15KW.
The vanadium aluminum alloy rod is sent into the electron beam melting furnace, the electron beam melting furnace is vacuumized to 3 X 103Pa ~ 6 X 102Pa, the water-cooled crucible in the electron beam melting furnace is cooled with water, the temperature is maintained at 20°C ~ 60°C, and the high pressure is set at 9kV ~ 10kV. The vanadium aluminum alloy bar was bombarded with IOOOmA ~ 1500mA electron beam to melt it into a water-cooled crucible. At 3000°C ~ 3400°C, the metal vanadium was melted in the melting zone of the water-cooled crucible for 20min ~ 30min, and the electron beam was closed. The liquid vanadium in the water-cooled crucible was solidified into a metal key. Ingot.
Vanadium alloy rods into the process of electron beam melting furnace, electron beam bombardment to the vanadium alloy rods, melt vanadium alloy rods, melting process, the low boiling point impurity (aluminum, iron, chromium and other impurities) evaporate, vanadium alloy forming droplets into the cooling crucible, electron beam continues to vanadium alloy heating water-cooled crucible, water-cooled crucible melting zone further volatile impurities, The purity of the product can reach 99.5% ~ 99.9% without introducing other impurities in the production process. The method is suitable for industrial production with short production cycle, large production capacity, small environmental pollution, energy saving and greatly reduced production cost.
