Abstract
In this paper, we study the possibility of obtaining iron and titanium-vanadium concentrates with highest contents of iron and titanium, respectively, through hydrometallurgical processing of the titanomagnetite ores of the Chineisk deposit. We varied two key parameters to determine the efficiency of the process: (a) concentration of leaching solution (ammonium fluoride); and (b) acidity of solution. Ammonium fluoride concentration was varied from 0.08 mol/L to 4.2 mol/L with the other fixed parameters. It was shown that optimum ammonium fluoride concentration for leaching the ore is 0.42 mol/L; at these concentrations iron and titanium contents are about 62.8 wt % and 3.5 wt % in solid phase, respectively. The acidity of solution was changed by adding of hydrofluoric acid with varied concentration (from 0.86 mol/L to 4.07 mol/L) to ammonium fluoride solution with fixed concentration of 0.42 mol/L. The best results (degree of titanium extraction = 63.7%) were obtained when using a solution of hydrofluoric acid with concentration 4.07 mol/L. In this case, the addition of acid makes it possible to increase the Fe/Ti ratio by 3.4 times in comparison with the original ore. Thus, we conclude that acidity and the concentration of ammonium fluoride solution significantly influences the selectivity of the hydrometallurgical process.
Highlights
Vanadium-containing titanomagnetite ores are among the most promising types of unconventional ores, and an important source of titanium, vanadium and iron [1,2,3]
As follows from the diagram (Figure 10), the ore is treated by the leaching solution of the required
Extraction of a predetermined amount of titanium from the ore, the heap is an iron concentrate that is Thefor possibility for titanomagnetite ore processing through the selective recovery of titanium suitable further metallurgical processing
Summary
Vanadium-containing titanomagnetite ores are among the most promising types of unconventional ores, and an important source of titanium, vanadium and iron [1,2,3]. The content of these components in the ore is sufficient for industrial extraction, though it can vary widely. In Russia, stocks of V2 O5 and TiO2 account for 80% and 18.5%, respectively, in these ores. The world’s total reserves of titanomagnetites amount to tens of billions of tons [1,4,5,6] and about 50% of iron ore reserves of this type belong to the Russian. More than 40 deposits in Russia have been discovered and estimated to varying degrees
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