Methods of chemical analysis, XRD, and pH monitoring are adopted in order to study wet extraction of Fe, V and Ti based on activated reduction, and the control conditions as well as the degree of recovery are determined. The primary-leaching in NaHCO3 saturated solution followed by final-leaching via carbonization is possible, and the leaching ratio for Na approaches 94% as the pH value of the alkali is controlled at 8 in the carbonization process. Metallic iron powder with an iron content of 94% is prepared by means of magnetic separation, and there are few slag fragments bearing V and Ti dispersed within iron particles. Precipitation of NaHCO3 and Si, Al impurities is completed during thorough carbonization at a pH value of 6, and the concentration of Si and Al in the resultant solution after carbonization meets the specifications for V extraction by an ammonia method. Residue from carbonization leaching displays good solubility in dilute acid, the leaching rate of Ti in dilute 15 vol.% hydrochloric acid exceeds 95%, and a purity of 98.4% for titanium white pigment is acquired from the acid-leaching lixivium by reheating hydrolysis. Finally, the overall degree of Fe, V and Ti recovery during wet extraction reaches 94, 90 and 90% respectively.
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Translated from Metallurg, Vol. 65, No. 10, pp. 55–60, October, 2021. Russian DOI: 10.52351/00260827_2021_10_55.
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Jun, Z., Feng, W., Yuan-hong, Q. et al. High-Efficiency Extraction of Fe, V, and Ti from Vanadium Titano-Magnetite Concentrate Based on Activated Reduction. Metallurgist 65, 1125–1132 (2022). https://doi.org/10.1007/s11015-022-01255-9
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DOI: https://doi.org/10.1007/s11015-022-01255-9