Extraction of Vanadium from the Dust of Ore-Thermal Melting ?f Ilmenite Concentrate Using Deep Eutectic Solvents

During the production of titanium slag by melting ilmenite concentrate, a large amount of dust is formed, most of which is taken to the landfill. The problem of dust disposal and recycling is the most important task of titanium production, since valuable components that can be extracted are lost along with the dust. In addition, the storage of dust in open landfills causes great harm to the environment. The use of deep eutectic solvents as green solvents for dust leaching has great prospects. The possibility of extracting vanadium from the dust of ore-thermal melting using deep eutectic solvents based on choline chloride and carboxylic acids is investigated. The highest yield of vanadium was during leaching in the Oxaline system and amounted to 89 %. The results of leaching were compared with leaching with equivalent aqueous acid solutions. The effect of ultrasound on the time of the leaching process was also studied. The resulting vanadium-containing material can be used as an additive to the charge in the accompanying technology for the production of vanadium pentoxide.