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

摘要

V containing spinel phase was successfully separated from vanadium slag by centrifugal casting. With the process parameters of (3=900 (where normal gravity G=1), t=20 min and 7=1557 K, almost all V containing spinel phase is enriched in the concentrate, while the tailing is made up of Fe_2SiO_4, Fe_2TiO_4 and Mn_2VO_4 phases. Under the hypothesis that the vanadium and silicon exist in the slag as V_2O_3 and SiO_2, the mass fractions of V_2O_3 and SiO_2 in the concentrate are 25.2 and 2.2%, while those of the tailing are 0.08 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.