Production of vanadium pentoxide from vanadium ore
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Production of vanadium pentoxide from vanadium ore
The chemical composition of vanadium ore is: v0.3%-1.4%, Fe about 60%, TiO2 about 14%. Vanadium-containing pig iron is obtained by reducing vanadium ore with coke in a blast furnace (or electric furnace). It contains v0.4%-1.2%, si<0.5%, and Ti about 0.3%.
The vanadium slag obtained by blowing the pig iron with oxygen in a top-blown oxygen converter (or ladle) contains V10%-15%, feo25%-45%, sio213%-20%, TiO2 about 10%, and cr2o31%-5.0%. The slag is mixed with metallic iron (semi-steel).
After crushing and ball milling, the particle size is less than 0.1mm, and the metallic iron is selected by an air separator or magnetic separator and used as a raw material for the production of vanadium pentoxide. Vanadium exists in the spinel phase in vanadium slag.
V2O3 should be oxidized to V2O5 by oxidation method, and then combined with Na2O to form water-soluble sodium vanadate. Use soda ash and Glauber's salt.
