Study of the Effect of Roasting System on Leaching Process of Sodium Vanadium Residue

Bao-yao LIU, Pei-yang SHI, Mao-fa JIANG


Reasonable choice of sodium roasting process system for vanadium and solution purification plays an important role. The effects of roasting process on the migration behavior of V , Si and P were studied systematically by means of XRD and fluorescence spectr oscopy. The results show that the vanadium iron spinel phase disappears gradually with the increase of calcination temperature, and the diffraction peaks of sodium vanadate, sodium silicate and sodium chromate are gradually enhanced. With the increase of c alcination temperature and the reaction time, the leaching efficiency of vanadium in vanadium slag increased first and then decreased. When the calcination temperature was 860 ° C , the maximum leaching efficiency of vanadium was 91.0% . The leaching efficien cy of Si, P and Cr in vanadium slag is gradually increased, and the higher the temperature, the higher the leaching efficiency of these elements is, and the suitable process is roasting Temperature 860 ° C and time 45min.


Vanadium slag , Soda roasting , Leaching process , Na 2 CO 3 /V 2 O 5 ratio



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