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.

Industrial, Ecological and Resource-Efficient Aspects of Vanadium Production and Use of Technogenic Vanadium Sources

“…In laboratory experiments samples with a charge containing 5 gram of slag and varied amounts of an alkaline additive (Na 2 CO 3 soda) at 50 %, 33 % and 20 % of the total weight of the charge were used. All samples were roasted for 1.5 hour at different temperatures in the range of 800 °C to 1100 °C [18,19]. Leaching of this charge was carried out at temperatures from 50 °C to 80 °C using water for 1, 2 and 3 hours.…”

Analysis of the Leaching Stage Effect on the Vanadium Extraction from Technogenic Raw Materials

“…The main stages of vanadium slag processing are grinding, oxidizing roasting with reactive additives to convert vanadium into an easily soluble form, leaching of the roasting product and subsequent vanadium precipitation from solution in the form of vanadate [11]. The efficiency of this process depends not only on the slag chemical composition and oxidative roasting modes, but also on the applied technological solutions for leaching [12 -14].…”