Laboratory assessment of isothermal separation of V containing spinel phase from vanadium slag by centrifugal casting

Abstract

V containing spinel phase was successfully separated from vanadium slag by centrifugal casting. With the process parameters of G = 900 (where normal gravity G = 1), t = 20 min and T = 1557 K, almost all V containing spinel phase is enriched in the concentrate, while the tailing is made up of Fe₂SiO₄, Fe₂TiO₄ and Mn₂VO₄ phases. Under the hypothesis that the vanadium and silicon exist in the slag as V₂O₃ and SiO₂, the mass fractions of V₂O₃ and SiO₂ in the concentrate are 25·2 and 2·2%, while those of the tailing are 0·8 and 32·2% respectively. The recovery ratio of V in the concentrate is up to 97·4%, while the removal ratio of Si is 92·5% by centrifugal separation.