Titanium-Enriched Slag Prepared by Atmospheric Hydrochloric Acid Leaching of Mechanically Activated Vanadium Titanomagnetite Concentrates

Abstract

The titanium-enriched slag was obtained via atmospheric hydrochloric acid leaching of mechanically activated vanadium titanomagnetite concentrates (VTMCs). Under the influence of mechanical activation, specific physicochemical changes were observed via X-ray diffractometry, scanning electron microscopy, and granulometric laser diffraction analysis. Experimental findings revealed that the mechanical activation of VTMCs resulted in a decrease in the median volume particle diameter (d50) and an increase in the specific surface area (SA) with an increased milling time. The results of the leaching experiment revealed that the mechanical activation treatment favors the extraction of iron (Fe) and titanium dioxide (TiO2) from the VTMCs. The Fe and TiO2 extractions from the mechanically activated sample after 10 h compared with the unactivated sample were increased by 12.82% and 4.73%, respectively. The presence of the ilmenite phase in the titanium-enriched slag was confirmed by X-ray diffractometry and EDS patterns, and the content of the TiO2 in the enriched slag can get as high as 43.75%.

Processing of titanium-containing ores for the production of titanium products: A comprehensive review

“…When Ti slag is sintered with NaOH, Ti, Si, V, and Al form titanates, silicates, vanadates, and aluminates, respectively, which dissolve in water, while Ti remains in the precipitate, and dissolves in H 2 SO 4 or HCl with further isolation of titanic acid. The resulting product is converted into a white TiO 2 pigment by calcination [ 46 , 47 ]. A new technology has been developed for the industrial production of the high-quality pigment TiO 2 [ 48 ], composition, wt.…”

“…This technology includes alkaline roasting, leaching with a solution of HCl at a concentration of 2 mol/dm 3 , and calcining the titanic acid to produce pigmentary TiO 2 . The most interesting technology is the production of pigment TiO 2 from slag obtained from the processing of titanomagnetite concentrate [ 46 , 49 ]. According to the technological scheme ( Fig.…”

Processing of Titanium-Containing Ores for the Production of Titanium Products: A Comprehensive Review

“…Hydrochloric acid leaching is one of the most frequently used well-proven methods of modernization of titanium-containing raw materials [25][26][27].…”