Study of Parameters Affecting the Recovery of Vanadium from Saghand-e-Yazed Ore(Anomally-II) Using Alkaline Roasting – Acid Leaching Process

In this study, the feasibility of vanadium recovery from magnetite ore (Anomally II) of Saghand area in the central part of Iran was investigated. Alkaline roasting-acid leaching process was applied to separate and extract vanadium from magnetite ore. Initially, ore samples having dimensions of less than 100 microns were crushed and grounded. The roasting stage was conducted by placing the sample mixed with certain sodium carbonate (salt) in a muffle furnace at a certain temperature and time. The roasted sample was leached in sulfuric acid at a certain temperature, the liquid to solid ratio (l/s), as well as the concentration of acid and time. In this research, the effect of roasting and leaching different parameters on the vanadium recovery from magnetite ore was determined. The results showed that the optimum temperature, time and sodium carbonate content in the roasting process were 1000˚C, 2 h and 40 wt%, respectively. Also, values of concentration of sulfuric acid, temperature, liquid to solid ratio and time were optimized for the leaching process. The maximum vanadium recovery of 87.8% was achieved under the optimum leaching condition of 85˚C, L/S:10/1, sulfuric acid concentration:4M and leaching time 5h.