Research on Vanadium Extraction from Vanadium-bearing Iron Concentrate by Roasting with Sodium Salt and Ion Exchange Process

Using the Baima vanadium-bearing titaniferous magnetite concentrate as raw material,research on sodium roasting and ion exchange process was carried out in the laboratory.The research focused on the effects of different kinds of sodium agents,proportioning,roasting temperature and cooling condition on the roasting leaching ratio of the vanadium-bearing titaniferous magnetite concentrate and 8 rounds of clinker roasting,leaching,ion exchange and water cycling trials were carried out.The results show that the vanadium leaching rate can reach 85%~90% with Na₂CO₃ content of 3%~4%,roasting temperature of 1 150 ℃,and roasting time of 30 min.Phosphorus exhibited an enrichment during water cycling process.With enrichment to a certain extent,phosphorus should be removed for water recirculation.