Oxidation Kinetics, Structural Changes and Element Migration during Oxidation Process of Vanadium-titanium Magnetite Ore

Pan, Feng; Zhu, Qingshan; Du, Zhan; Sun, Haoyan

doi:10.1016/s1006-706x(16)30171-6

Cited by 23 publications

(15 citation statements)

References 19 publications

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“…The main chemical compositions of titanaugite were Ca 2+ ions, Mg 2+ ions, and Al 3+ ions. Under the weak acid pulp condition, most of the Ca 2+ ions and Mg 2+ ions were dissolved from the titanaugite surface, and the remaining metallic ions were mainly Al 3+ ions (Table 5), in the forms of Al(OH) 3 [28], as the active sites on which OHA molecules were adsorbed; this resulted in a remarkable chemical shift of Al2p (+0.25 eV, Table 4). The chemical compositions of MA-spinel were only Mg 2+ ions and Al 3+ ions; under the weak acid pulp, a portion of the Mg 2+ ions were dissolved, and the remaining metallic ions were still Mg 2+ ions and Al 3+ ions ( Table 7).…”

Section: Interaction Mechanism Of Oha and Mineralsmentioning

confidence: 99%

Flotation Behaviors of Perovskite, Titanaugite, and Magnesium Aluminate Spinel Using Octyl Hydroxamic Acid as the Collector

et al. 2017

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Abstract:The flotation behaviors of perovskite, titanaugite, and magnesium aluminate spinel (MA-spinel), using octyl hydroxamic acid (OHA) as the collector, were investigated using microflotation experiments, zeta-potential measurements, Fourier transform infrared (FT-IR) analyses, X-ray photoelectron spectroscopy (XPS) analyses, and flotation experiments on artificially mixed minerals. The microflotation experiments show that the floatability of perovskite is clearly better than titanaugite and MA-spinel at around pH 5.5, while titanaugite possesses certain floatability at pH 6.0-6.5, and MA-spinel displays good floatability at pH > 8.0. The results of the FT-IR and XPS analyses show that OHA mainly interacts with Ti, resulting in perovskite flotation, and that the Al on titanaugite, as well as the Mg and Al on the MA-spinel surface, chemically react with OHA under acidic conditions. However, OHA mainly reacts with the Ti and Ca on the perovskite surface, Ca and Mg on the titanaugite surface, and Mg and Al on the MA-spinel surface under alkaline conditions. The results of the artificially mixed mineral flotation experiment show that the concentrate of TiO 2 grade increased from 19.73% to 30.18% at pH 5.4, which indicates that a weakly acidic solution is the appropriate condition for the flotation separation of perovskite from titanaugite and MA-spinel. The results of the modified slag flotation experiments show that the TiO 2 grade of concentrate increased from 18.13% to 23.88% at pH 5.4, through the open circuit test of "one roughing and one cleaning". OHA displays selectivity toward perovskite in the modified slag flotation, but the consumption of H 2 SO 4 is very high. The CaSO 4 precipitate covered on the mineral surfaces results in poor TiO 2 grade and recovery.

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Section: Interaction Mechanism Of Oha and Mineralsmentioning

confidence: 99%

Flotation Behaviors of Perovskite, Titanaugite, and Magnesium Aluminate Spinel Using Octyl Hydroxamic Acid as the Collector

et al. 2017

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“…10) Moreover, Tang et al 13) studied the coupled effect of TiO 2 , V 2 O 5 , and Cr 2 O 3 during the oxidization process. Actually, the content of gangue components is very high in vanadium-titanium magnetite ore. MgO naturally exists in the form of solid solution in most iron ores, in which the content of MgO is more than 2.5 wt.% in some iron ores, 14) even as high as 7.8% in the Panzhihua vanadious titanomagnetite Ore. 15) Obviously, the existence of MgO also influences the reduction performance of the natural iron ores.…”

Section: Migration Behavior Of the Mgo And Its Influence On The Reducmentioning

confidence: 99%

Migration Behavior of the MgO and its Influence on the Reduction of Fe<sub>3</sub>O<sub>4</sub>–MgO Sinter

Pan

Zhu

et al. 2018

ISIJ International

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“…20) In recent years, the oxidation roasting and gas-based direct reduction of titaniferous or other iron oxides have been widely investigated by a large amount of researchers. [21][22][23][24][25][26][27] Zhang et al 21) studied the morphological changes and phase transition behaviors for the weak reduction of preoxidized Panzhihua ilmenite by hydrogen. Chen et al 24) investigated the effects of different parameters such as the size, preheating conditions, and roasting conditions on the roasting characteristics of vanadium titanomagnetite pellet.…”

Section: Effects Of Preheating Temperature and Time Of Hongge Vanadiumentioning

confidence: 99%

Effects of Preheating Temperature and Time of Hongge Vanadium Titanomagnetite Pellet on Its Gas-Based Direct Reduction Behavior with Simulated Shaft Furnace Gases

Wang

et al. 2018

ISIJ Int.

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Oxidation Kinetics, Structural Changes and Element Migration during Oxidation Process of Vanadium-titanium Magnetite Ore

Cited by 23 publications

References 19 publications

Flotation Behaviors of Perovskite, Titanaugite, and Magnesium Aluminate Spinel Using Octyl Hydroxamic Acid as the Collector

Flotation Behaviors of Perovskite, Titanaugite, and Magnesium Aluminate Spinel Using Octyl Hydroxamic Acid as the Collector

Migration Behavior of the MgO and its Influence on the Reduction of Fe<sub>3</sub>O<sub>4</sub>–MgO Sinter

Effects of Preheating Temperature and Time of Hongge Vanadium Titanomagnetite Pellet on Its Gas-Based Direct Reduction Behavior with Simulated Shaft Furnace Gases

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