Studies on extraction of vanadium by fluo-solid salt roasting

A vanadium bearing titaniferous magnetite ore from Mayurbhanj district, Orissa, containing 0.97% V2O5. 13.88% TiO2 and 55.44% total iron was used for studies on extraction of vanadium by fluo-solid salt roasting in a 2.54 cm diameter quartz reactor. At optimum roasting temperature of 850°C, a feed with ore: salt ratio of 25: 3 employing-60 + 120 mesh (B.S.S.) size of the ore was roasted for 120 minutes while 60% of vanadium was converted to soluble vanadate. Fluidisation was effected with an air rate of 180 litres per hour with a-60 +120 mesh (B.S.S) size of ore. Leaching of the roasted ore gave rise to liquor free from chromium, aluminium and silica. (Mr. A.K. Saha, Junior Scientific Assistant, Mr. R.N. Misra, Scientist and Mr.P.P.Bhatnagar, Scientist, National Metallurgical Laboratory, Jamshedpur