Why is vanadium pentoxide an important intermediate product in vanadium processing?

Vanadium pentoxide ($V_2{O}_5$) is a critical intermediate product in vanadium processing because it serves as the primary precursor for producing both vanadium metal and its most common commercial form, ferrovanadium.12

Its importance is defined by several key roles:

• Primary Feedstock: Most vanadium-bearing ores, slags, and residues are processed through various smelting, roasting, and leaching techniques specifically to isolate and concentrate vanadium as $V_2{O}_5$.12
• Production of Ferrovanadium: In the production of ferrovanadium, $V_2{O}_5$ is reduced in an electric-arc furnace with iron and aluminum. This alloy is the most significant commercial use of the element, essential for creating high-strength steels and cast irons.12
• Metal Extraction: To obtain pure vanadium metal, $V_2{O}_5$ is reduced metallothermically using agents such as calcium or aluminum.1
• Catalytic Applications: Beyond its role as a processing intermediate, $V_2{O}_5$ is directly utilized as an important industrial catalyst, most notably in the contact process for the manufacture of sulfuric acid.12