|About this Abstract
||Part C-3: Processing of Critical Metals
||Vanadium Extraction from Low Concentrated Iron Bearing Sources by a New Method
||Benedikt Nowak, Raffael Stastny, Herbert Weissenbaeck
|On-Site Speaker (Planned)
For sources with an iron-to-vanadium ratio of far above 1, it is proposed to leach in acid and to oxidize under autoclave conditions. Experimentally it could be shown that free HCl prevents the precipitation of both iron and vanadium. If the initial concentration of free HCl is an order that can be consumed by the ferrous-to-ferric oxidation, also vanadium will co-precipitate as iron-vanadium-oxide. By means of setting the right HCl concentration, an iron-to-vanadium ratio of close to 1 can be reached, whereas the liquid remainder is almost vanadium free. Further processing of this filter cake by conventional technologies such as caustic leaching and precipitation with ammonia, salt roasting, or reduction with aluminum yields common marketable products.
||Planned: At-meeting proceedings