Results of experiments on vanadium extraction out of Kusinsky deposit titanium-magnetite ores enrichment wastes

Abstract

The actuality of exhausted of titanium-magnetite ore deposits wastes is stipulated not only by necessity of their negative impact on environmental elimination, but also by a possibility of application of these wastes as vanadium-containing raw materials. Analysis of existing technological processes for vanadium extraction accomplished. A possibility of vanadium extraction out of Kusinsky deposit titanium-magnetite ore tails studied. Results of experiments on vanadium extraction as soluble vanadates by leaching from the samples after roasting with soda ash, sodium sulfate, calcium oxide, and sodium chloride in various mass ratios presented. It was determined, that additives of sodium chloride and sodium carbonate are the most effective reagents for roasting of this type of vanadium raw materials. A significant effect of titanium-magnetite ore tails chemical composition on the vanadium extraction degree revealed: with an increase content from 0.15% to 0.53% in the ore tails vanadium, the extraction degree increases to 74.8%. When using the sodium chloride reaction additive, it is possible to leach in only one stage using sulfuric acid. Increasing the sodium chloride amount in the roasting mixture leads to a significant increase in the vanadium extraction degree in the leaching solution.